1156 lines
46 KiB
Java
1156 lines
46 KiB
Java
package electrosphere.collision;
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// import static org.ode4j.ode.OdeConstants.dContactBounce;
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// import static org.ode4j.ode.OdeConstants.dContactSoftCFM;
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// import static org.ode4j.ode.OdeConstants.dInfinity;
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import static org.ode4j.ode.OdeHelper.areConnectedExcluding;
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// import static org.ode4j.ode.OdeMath.dCalcVectorLengthSquare3;
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// import static org.ode4j.ode.OdeMath.dSubtractVectors3;
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// import static org.ode4j.ode.internal.Common.dRecip;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import java.util.concurrent.locks.ReentrantLock;
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import org.joml.Matrix4d;
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import org.joml.Quaterniond;
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import org.joml.Vector3d;
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import org.joml.Vector4d;
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import org.ode4j.math.DVector3;
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import org.ode4j.ode.DBody;
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import org.ode4j.ode.DBox;
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import org.ode4j.ode.DCapsule;
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import org.ode4j.ode.DContact;
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import org.ode4j.ode.DContactBuffer;
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import org.ode4j.ode.DContactGeom;
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import org.ode4j.ode.DContactJoint;
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import org.ode4j.ode.DCylinder;
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import org.ode4j.ode.DGeom;
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import org.ode4j.ode.DGeom.DNearCallback;
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import org.ode4j.ode.DJoint;
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import org.ode4j.ode.DJointGroup;
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import org.ode4j.ode.DMass;
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import org.ode4j.ode.DRay;
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import org.ode4j.ode.DSpace;
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import org.ode4j.ode.DSphere;
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import org.ode4j.ode.DTriMesh;
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import org.ode4j.ode.DTriMeshData;
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import org.ode4j.ode.DWorld;
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import org.ode4j.ode.OdeHelper;
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import electrosphere.collision.RayCastCallback.RayCastCallbackData;
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import electrosphere.collision.collidable.Collidable;
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import electrosphere.collision.collidable.SurfaceParams;
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import electrosphere.engine.Globals;
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import electrosphere.engine.time.Timekeeper;
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import electrosphere.entity.Entity;
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import electrosphere.entity.EntityDataStrings;
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import electrosphere.entity.EntityUtils;
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import electrosphere.entity.state.collidable.Impulse;
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import electrosphere.entity.state.physicssync.ServerPhysicsSyncTree;
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import electrosphere.game.data.collidable.CollidableTemplate;
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import electrosphere.game.data.collidable.HitboxData;
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import electrosphere.logger.LoggerInterface;
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/**
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* The main collision engine class. Tracks all entities that collide in its system and fires callbacks when they do.
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*/
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public class CollisionEngine {
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//gravity constant
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public static final float GRAVITY_MAGNITUDE = 0.15f;
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/**
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* The damping applied to angular velocity
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*/
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public static final double DEFAULT_ANGULAR_DAMPING = 0.01;
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/**
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* The damping applied to linear velocity
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*/
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public static final double DEFAULT_LINEAR_DAMPING = 0.01;
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/**
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* Default max angular speed
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*/
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public static final double DEFAULT_MAX_ANGULAR_SPEED = 100;
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/**
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* The number of times the physics engine should be simulated per frame of main game.
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* IE, if this value is 3, every main game engine frame, the physics simulation will run 3 frames.
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* This keeps the physics simulation much more stable than it would be otherwise.
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*/
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public static final int PHYSICS_SIMULATION_RESOLUTION = 5;
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/**
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* Threshold after which the engine warns about collidable count
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*/
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public static final int COLLIDABLE_COUNT_WARNING_THRESHOLD = 5000;
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/**
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* Default distance to interact with collidables at (ie picking where to place things)
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*/
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public static final double DEFAULT_INTERACT_DISTANCE = 5.0;
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//world data that the collision engine leverages for position correction and the like
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CollisionWorldData collisionWorldData;
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//Ode-specific stuff
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private DWorld world;
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private DSpace space;
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private static ReentrantLock spaceLock = new ReentrantLock();
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private DJointGroup contactgroup;
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// maximum number of contact points per body
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/**
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* <p> Maximum number of contact points per body </p>
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* <p><b> Note: </b></p>
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* <p>
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* This value must be sufficiently high (I'd recommend 64), in order for large bodies to not sink into other large bodies.
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* I used a value of 10 for a long time and found that cubes were sinking into TriMeshes.
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* </p>
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*/
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private static final int MAX_CONTACTS = 64;
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//The list of dbodies ode should be tracking
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List<DBody> bodies = new ArrayList<DBody>();
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//This is used to relate DBody's back to their collidables so that when the library detects a collision, the callback can know which collidables are involved.
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Map<DBody,Collidable> bodyPointerMap = new HashMap<DBody,Collidable>();
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//The list of all collidables the engine is currently tracking
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List<Collidable> collidableList = new ArrayList<Collidable>();
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//callbacks for collision check
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RayCastCallback rayCastCallback = new RayCastCallback();
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//the collision resolution callback
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CollisionResolutionCallback collisionResolutionCallback;
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//buffer for collisions
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DContactBuffer contacts = null;
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// Callback for any near collisions in the broadphase of the collision check
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private DNearCallback nearCallback;
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/**
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* Constructor
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*/
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public CollisionEngine(){
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world = OdeHelper.createWorld();
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space = OdeHelper.createBHVSpace(Collidable.TYPE_STATIC_BIT);
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world.setGravity(0,-GRAVITY_MAGNITUDE,0);
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// world.setContactMaxCorrectingVel(0.1);
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// world.setContactSurfaceLayer(0.001);
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world.setCFM(1e-5);
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//base plane
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OdeHelper.createPlane(space, 0, 1, 0, 0);
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contactgroup = OdeHelper.createJointGroup();
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this.nearCallback = new DNearCallback() {
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@Override
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public void call(Object data, DGeom o1, DGeom o2) {
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nearCallback( data, o1, o2);
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}
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};
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}
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/**
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* Creates a collision engine with a specified callback
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*/
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public static CollisionEngine create(CollisionResolutionCallback callback){
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CollisionEngine rVal = new CollisionEngine();
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rVal.setCollisionResolutionCallback(callback);
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return rVal;
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}
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/**
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* Resolves collisions in the engine
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* @param contactGeom the ode4j contact geometry
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* @param impactor the instigator of the collision
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* @param receiver the receiver of the collision
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* @param normal the normal to the collision surface
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* @param localPosition the local position of the collision
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* @param worldPos the world position of the collision
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* @param magnitude the magnitude of the collision
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*/
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public static void resolveCollision(DContactGeom contactGeom, Collidable impactor, Collidable receiver, Vector3d normal, Vector3d localPosition, Vector3d worldPos, float magnitude){
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switch(receiver.getType()){
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case Collidable.TYPE_CREATURE:
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switch(impactor.getType()){
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case Collidable.TYPE_TERRAIN:
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// System.out.println(EntityUtils.getPosition(impactor.getParent()) + " " + EntityUtils.getPosition(receiver.getParent()));
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// System.out.println();
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// System.out.println("Terrain-creature collision: " + normal + " mag:" + magnitude);
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// if(normal.y > normal.x + normal.z){
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// normal.x = 0;
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// normal.z = 0;
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// }
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receiver.addImpulse(new Impulse(normal, localPosition, worldPos, magnitude * 2, Collidable.TYPE_TERRAIN));
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break;
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case Collidable.TYPE_CREATURE:
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receiver.addImpulse(new Impulse(normal, localPosition, worldPos, magnitude, Collidable.TYPE_CREATURE));
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break;
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case Collidable.TYPE_STRUCTURE:
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// float realMag = 1f/(float)Math.pow(0.1, magnitude);
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// System.out.println(normal + " - " + realMag);
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receiver.addImpulse(new Impulse(normal, localPosition, worldPos, magnitude, Collidable.TYPE_STRUCTURE));
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// System.out.println("Structure-creature collision");
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break;
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case Collidable.TYPE_ITEM:
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receiver.addImpulse(new Impulse(normal, localPosition, worldPos, magnitude, Collidable.TYPE_ITEM));
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break;
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case Collidable.TYPE_OBJECT:
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receiver.addImpulse(new Impulse(normal, localPosition, worldPos, magnitude, Collidable.TYPE_OBJECT));
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break;
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case Collidable.TYPE_FOLIAGE_STATIC:
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receiver.addImpulse(new Impulse(normal, localPosition, worldPos, magnitude, Collidable.TYPE_OBJECT));
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break;
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}
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break;
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case Collidable.TYPE_ITEM:
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switch(impactor.getType()){
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case Collidable.TYPE_TERRAIN:
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// System.out.println(EntityUtils.getPosition(impactor.getParent()) + " " + EntityUtils.getPosition(receiver.getParent()));
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// System.out.println();
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// System.out.println("Terrain-item collision: " + normal + " mag:" + magnitude);
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// if(normal.y > normal.x + normal.z){
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// normal.x = 0;
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// normal.z = 0;
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// }
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receiver.addImpulse(new Impulse(normal, localPosition, worldPos, magnitude * 2, Collidable.TYPE_TERRAIN));
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break;
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case Collidable.TYPE_CREATURE:
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receiver.addImpulse(new Impulse(normal, localPosition, worldPos, magnitude, Collidable.TYPE_CREATURE));
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break;
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case Collidable.TYPE_STRUCTURE:
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// float realMag = 1f/(float)Math.pow(0.1, magnitude);
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// System.out.println(normal + " - " + realMag);
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receiver.addImpulse(new Impulse(normal, localPosition, worldPos, magnitude, Collidable.TYPE_STRUCTURE));
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// System.out.println("Structure-creature collision");
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break;
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case Collidable.TYPE_ITEM:
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receiver.addImpulse(new Impulse(normal, localPosition, worldPos, magnitude, Collidable.TYPE_ITEM));
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break;
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case Collidable.TYPE_OBJECT:
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receiver.addImpulse(new Impulse(normal, localPosition, worldPos, magnitude, Collidable.TYPE_OBJECT));
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break;
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}
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break;
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}
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}
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public void clearCollidableImpulseLists(){
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spaceLock.lock();
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for(Collidable collidable : collidableList){
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collidable.clear();
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}
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spaceLock.unlock();
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}
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public List<Collidable> getCollidables(){
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return collidableList;
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}
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/**
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*
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* @param e the entity that wants to move
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* @param positionToCheck the position that it wants to move to
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* @return true if it can occupy that position, false otherwise
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*/
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public boolean checkCanOccupyPosition(CollisionWorldData w, Entity e, Vector3d positionToCheck){
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boolean rVal = true;
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//
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// check world bounds
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//
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if(
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positionToCheck.x < collisionWorldData.getWorldBoundMin().x ||
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positionToCheck.y < collisionWorldData.getWorldBoundMin().y ||
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positionToCheck.z < collisionWorldData.getWorldBoundMin().z ||
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positionToCheck.x > collisionWorldData.getWorldBoundMax().x ||
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positionToCheck.y > collisionWorldData.getWorldBoundMax().y ||
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positionToCheck.z > collisionWorldData.getWorldBoundMax().z
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){
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return false;
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}
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// //
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// // are we below the terrain?
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// //
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// if(w.getElevationAtPoint(positionToCheck) > positionToCheck.y){
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// return false;
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// }
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return rVal;
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}
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/**
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* Performs the collision and simulation phases for this collision engine
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* @param time The time to increment the physics simulation by
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*/
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public void simulatePhysics(float time){
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Globals.profiler.beginCpuSample("physics");
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spaceLock.lock();
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for(int i = 0; i < PHYSICS_SIMULATION_RESOLUTION; i++){
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Globals.profiler.beginCpuSample("collide");
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OdeHelper.spaceCollide(space, 0, nearCallback);
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Globals.profiler.endCpuSample();
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// space.collide2(space, collisionWorldData, nearCallback);
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//simulate physics
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Globals.profiler.beginCpuSample("step physics");
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world.quickStep(Timekeeper.ENGINE_STEP_SIZE);
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Globals.profiler.endCpuSample();
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// remove all contact joints
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contactgroup.empty();
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}
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spaceLock.unlock();
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Globals.profiler.endCpuSample();
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}
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/**
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* Runs a collision cycle on all bodies in the collision engine
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*/
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public void collide(){
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Globals.profiler.beginCpuSample("physics");
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spaceLock.lock();
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Globals.profiler.beginCpuSample("collide");
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OdeHelper.spaceCollide(space, 0, nearCallback);
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Globals.profiler.endCpuSample();
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// remove all contact joints
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contactgroup.empty();
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spaceLock.unlock();
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Globals.profiler.endCpuSample();
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}
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/**
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* Sets the near callback function for all collision calls.
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* !!YOU LIKELY WANT TO INSTEAD OVERWRITE THE CollisionResolutionCallback!!
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* @param callback the callback
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*/
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public void setNearCallback(DNearCallback callback){
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this.nearCallback = callback;
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}
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/**
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* This is called by dSpaceCollide when two objects in space are potentially colliding.
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* @param data The data
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* @param o1 the first collision body
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* @param o2 the second collision body
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*/
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private void nearCallback (Object data, DGeom o1, DGeom o2) {
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// if (o1->body && o2->body) return;
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// exit without doing anything if the two bodies are connected by a joint
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DBody b1 = o1.getBody();
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DBody b2 = o2.getBody();
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if (b1!=null && b2!=null && areConnectedExcluding (b1,b2,DContactJoint.class)){
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return;
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}
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Collidable c1 = bodyPointerMap.get(b1);
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Collidable c2 = bodyPointerMap.get(b2);
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if(c1 == null || c2 == null){
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return;
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}
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if(
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!(
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bodyPointerMap.get(b1).getType() == Collidable.TYPE_TERRAIN &&
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(
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bodyPointerMap.get(b2).getType() == Collidable.TYPE_TERRAIN ||
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!b2.isEnabled()
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)
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) &&
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!(
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bodyPointerMap.get(b2).getType() == Collidable.TYPE_TERRAIN &&
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(
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bodyPointerMap.get(b1).getType() == Collidable.TYPE_TERRAIN ||
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!b1.isEnabled()
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)
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) &&
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!(bodyPointerMap.get(b1).getType() == Collidable.TYPE_FOLIAGE_STATIC && bodyPointerMap.get(b2).getType() == Collidable.TYPE_FOLIAGE_STATIC)
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){
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try {
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//creates a buffer to store potential collisions
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DContactBuffer contacts = new DContactBuffer(MAX_CONTACTS); // up to MAX_CONTACTS contacts per box-box
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SurfaceParams surfaceParams = c1.getSurfaceParams();
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for (int i=0; i<MAX_CONTACTS; i++) {
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DContact contact = contacts.get(i);
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contact.surface.mode = surfaceParams.getMode();
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contact.surface.mu = surfaceParams.getMu();
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if(surfaceParams.getRho() != null){
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contact.surface.rho = surfaceParams.getRho();
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}
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if(surfaceParams.getRho2() != null){
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contact.surface.rho2 = surfaceParams.getRho2();
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}
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if(surfaceParams.getRhoN() != null){
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contact.surface.rhoN = surfaceParams.getRhoN();
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}
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if(surfaceParams.getBounce() != null){
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contact.surface.bounce = surfaceParams.getBounce();
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}
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if(surfaceParams.getBounceVel() != null){
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contact.surface.bounce_vel = surfaceParams.getBounceVel();
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}
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}
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//calculate collisions
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int numc = OdeHelper.collide(o1,o2,MAX_CONTACTS,contacts.getGeomBuffer());
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//create DContacts based on each collision that occurs
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if (numc != 0) {
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for (int i=0; i<numc; i++) {
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DContact contact = contacts.get(i);
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//special code for ray casting
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if (o1 instanceof DRay || o2 instanceof DRay){
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DVector3 end = new DVector3();
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end.eqSum( contact.geom.pos, contact.geom.normal, contact.geom.depth );
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continue;
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}
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// //
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// //apply shallow slope correction
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// if(
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// //is terrain
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// (c1.getType() == Collidable.TYPE_TERRAIN || c2.getType() == Collidable.TYPE_TERRAIN) &&
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// (!c1.getType().equals(c2.getType())) &&
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// contact.geom.normal.length() > 0
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// &&
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// //force is pointing basically upwards
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// PhysicsUtils.odeVecToJomlVec(contact.geom.normal).dot(MathUtils.getUpVector()) > 0.7
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// ){
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// System.out.println(PhysicsUtils.odeVecToJomlVec(contact.geom.normal).dot(MathUtils.getUpVector()));
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// if(//force is pointing basically upwards
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// PhysicsUtils.odeVecToJomlVec(contact.geom.normal).dot(MathUtils.getUpVector()) > 0.7){
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// contact.geom.normal.set(PhysicsUtils.jomlVecToOdeVec(MathUtils.getUpVector()));
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// }
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// }
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//
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//add contact to contact group
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DJoint c = OdeHelper.createContactJoint(world,contactgroup,contact);
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c.attach(b1,b2);
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// Use the default collision resolution
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if(collisionResolutionCallback == null) {
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resolveCollision(
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contact.geom,
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bodyPointerMap.get(o1.getBody()),
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bodyPointerMap.get(o2.getBody()),
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PhysicsUtils.odeVecToJomlVec(contact.geom.normal).mul(-1.0),
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PhysicsUtils.odeVecToJomlVec(contact.fdir1).mul(-1.0),
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PhysicsUtils.odeVecToJomlVec(contact.geom.pos),
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(float)contact.geom.depth
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);
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resolveCollision(
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contact.geom,
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bodyPointerMap.get(o2.getBody()),
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bodyPointerMap.get(o1.getBody()),
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PhysicsUtils.odeVecToJomlVec(contact.geom.normal),
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PhysicsUtils.odeVecToJomlVec(contact.fdir1),
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PhysicsUtils.odeVecToJomlVec(contact.geom.pos),
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(float)contact.geom.depth
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);
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} else {
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//use custom collision resolution
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collisionResolutionCallback.resolve(
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contact.geom,
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o1,
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o2,
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bodyPointerMap.get(o1.getBody()),
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bodyPointerMap.get(o2.getBody()),
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PhysicsUtils.odeVecToJomlVec(contact.geom.normal).mul(-1.0),
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PhysicsUtils.odeVecToJomlVec(contact.fdir1).mul(-1.0),
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PhysicsUtils.odeVecToJomlVec(contact.geom.pos),
|
|
(float)contact.geom.depth
|
|
);
|
|
collisionResolutionCallback.resolve(
|
|
contact.geom,
|
|
o2,
|
|
o1,
|
|
bodyPointerMap.get(o2.getBody()),
|
|
bodyPointerMap.get(o1.getBody()),
|
|
PhysicsUtils.odeVecToJomlVec(contact.geom.normal),
|
|
PhysicsUtils.odeVecToJomlVec(contact.fdir1),
|
|
PhysicsUtils.odeVecToJomlVec(contact.geom.pos),
|
|
(float)contact.geom.depth
|
|
);
|
|
}
|
|
}
|
|
}
|
|
} catch(ArrayIndexOutOfBoundsException ex){
|
|
//I've found that ode4j occasionally throws an exception on the OdeHelper.collide function.
|
|
//I don't know why it has out of bounds elements, but it's happening.
|
|
//Catching the exception here allows the engine to keep running at least.
|
|
LoggerInterface.loggerEngine.ERROR("ode4j error", ex);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets the function that is called once a collision has happened
|
|
* @param collisionResolutionCallback the function
|
|
*/
|
|
public void setCollisionResolutionCallback(CollisionResolutionCallback collisionResolutionCallback){
|
|
this.collisionResolutionCallback = collisionResolutionCallback;
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @param w The collision world data
|
|
* @param positionToCheck the position the entity wants to be at
|
|
* @return the position the engine recommends it move to instead (this is
|
|
* guaranteed to be a valid position)
|
|
*/
|
|
public Vector3d suggestMovementPosition(CollisionWorldData w, Vector3d positionToCheck){
|
|
Vector3d suggestedPosition = new Vector3d(positionToCheck);
|
|
//
|
|
// adjust for world bounds
|
|
//
|
|
if(suggestedPosition.x < collisionWorldData.getWorldBoundMin().x){
|
|
suggestedPosition.x = collisionWorldData.getWorldBoundMin().x;
|
|
}
|
|
if(suggestedPosition.y < collisionWorldData.getWorldBoundMin().y){
|
|
suggestedPosition.y = collisionWorldData.getWorldBoundMin().y;
|
|
}
|
|
if(suggestedPosition.z < collisionWorldData.getWorldBoundMin().z){
|
|
suggestedPosition.z = collisionWorldData.getWorldBoundMin().z;
|
|
}
|
|
if(suggestedPosition.x > collisionWorldData.getWorldBoundMax().x){
|
|
suggestedPosition.x = collisionWorldData.getWorldBoundMax().x;
|
|
}
|
|
if(suggestedPosition.y > collisionWorldData.getWorldBoundMax().y){
|
|
suggestedPosition.y = collisionWorldData.getWorldBoundMax().y;
|
|
}
|
|
if(suggestedPosition.z > collisionWorldData.getWorldBoundMax().z){
|
|
suggestedPosition.z = collisionWorldData.getWorldBoundMax().z;
|
|
}
|
|
return suggestedPosition;
|
|
}
|
|
|
|
|
|
/**
|
|
* Sets the collision world data
|
|
* @param collisionWorldData The collision world data
|
|
*/
|
|
public void setCollisionWorldData(CollisionWorldData collisionWorldData){
|
|
this.collisionWorldData = collisionWorldData;
|
|
}
|
|
|
|
|
|
public boolean collisionSphereCheck(Entity hitbox1, HitboxData hitbox1data, Entity hitbox2, HitboxData hitbox2data){
|
|
Vector3d position1 = EntityUtils.getPosition(hitbox1);
|
|
Vector3d position2 = EntityUtils.getPosition(hitbox2);
|
|
float radius1 = hitbox1data.getRadius();
|
|
float radius2 = hitbox2data.getRadius();
|
|
double distance = position1.distance(position2);
|
|
if(distance < radius1 + radius2){
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Main function to resynchronize entity positions with physics object positions after impulses are applied.
|
|
*/
|
|
public void updateDynamicObjectTransforms(){
|
|
Globals.profiler.beginCpuSample("updateDynamicObjectTransforms");
|
|
spaceLock.lock();
|
|
if(this.collisionWorldData != null){
|
|
for(Collidable collidable : collidableList){
|
|
if(collidable.getParentTracksCollidable()){
|
|
Entity physicsEntity = collidable.getParent();
|
|
DBody rigidBody = PhysicsEntityUtils.getDBody(physicsEntity);
|
|
Matrix4d inverseTransform = new Matrix4d();
|
|
Vector4d rawPos = inverseTransform.transform(new Vector4d(PhysicsUtils.getRigidBodyPosition(rigidBody),1));
|
|
Vector3d calculatedPosition = new Vector3d(rawPos.x,rawPos.y,rawPos.z);
|
|
Vector3d suggestedPosition = this.suggestMovementPosition(collisionWorldData, calculatedPosition);
|
|
if(calculatedPosition.distance(suggestedPosition) > 0){
|
|
collidable.addImpulse(new Impulse(new Vector3d(), new Vector3d(), new Vector3d(), 0, Collidable.TYPE_WORLD_BOUND));
|
|
}
|
|
Quaterniond newRotation = PhysicsUtils.getRigidBodyRotation(rigidBody);
|
|
EntityUtils.getPosition(physicsEntity).set(suggestedPosition);
|
|
EntityUtils.getRotation(physicsEntity).set(newRotation);
|
|
}
|
|
}
|
|
}
|
|
spaceLock.unlock();
|
|
Globals.profiler.endCpuSample();
|
|
}
|
|
|
|
/**
|
|
* Registers a collision object with the server
|
|
* @param body The body
|
|
* @param collidable The corresponding collidable
|
|
*/
|
|
public void registerCollisionObject(DBody body, Collidable collidable){
|
|
spaceLock.lock();
|
|
this.registerPhysicsObject(body);
|
|
bodyPointerMap.put(body,collidable);
|
|
collidableList.add(collidable);
|
|
spaceLock.unlock();
|
|
}
|
|
|
|
/**
|
|
* Deregisters a collidable from the physics engine
|
|
* @param collidable The collidable
|
|
*/
|
|
public void deregisterCollisionObject(DBody body, Collidable collidable){
|
|
spaceLock.lock();
|
|
bodyPointerMap.remove(body);
|
|
collidableList.remove(collidable);
|
|
spaceLock.unlock();
|
|
}
|
|
|
|
public void listBodyPositions(){
|
|
for(DBody body : bodies){
|
|
LoggerInterface.loggerEngine.INFO("" + body);
|
|
LoggerInterface.loggerEngine.INFO("" + PhysicsUtils.getRigidBodyPosition(body));
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Casts a ray into the scene and returns the first entity that the ray collides with.
|
|
* This will collide with any type of collidable object.
|
|
* @param start THe start position of the ray
|
|
* @param direction The direction the ray will travel in
|
|
* @param length The length of the ray to cast
|
|
* @return The entity that the ray collides with if successful, null otherwise
|
|
*/
|
|
public Entity rayCast(Vector3d start, Vector3d direction, double length){
|
|
return rayCast(start,direction,length,null);
|
|
}
|
|
|
|
/**
|
|
* Casts a ray into the collision space and returns the first entity that the ray collides with.
|
|
* The type mask is a list of collidable types that are valid collisions.
|
|
* For instance, if the typeMask only contains Collidable.TYPE_TERRAIN, only entities with the type terrain will
|
|
* be returned from the raycast.
|
|
* @param start The start position of the way
|
|
* @param length The length to cast the ray out to
|
|
* @param typeMask The mask of types to collide the ray with
|
|
* @return The entity that the ray cast collided with. Will be null if no entity was collided with.
|
|
*/
|
|
public Entity rayCast(Vector3d start, Vector3d direction, double length, List<String> typeMask){
|
|
spaceLock.lock();
|
|
Vector3d unitDir = new Vector3d(direction).normalize();
|
|
//create the ray
|
|
DRay ray = OdeHelper.createRay(space, length);
|
|
ray.set(start.x, start.y, start.z, unitDir.x, unitDir.y, unitDir.z);
|
|
//collide
|
|
RayCastCallbackData data = new RayCastCallbackData(bodyPointerMap, typeMask);
|
|
rayCastCallback.setLength(length);
|
|
space.collide2(space, data, rayCastCallback);
|
|
//destroy ray
|
|
ray.destroy();
|
|
spaceLock.unlock();
|
|
return data.collidedEntity;
|
|
}
|
|
|
|
/**
|
|
* Ray casts into the scene and gets the position of the closest collision's position in world space.
|
|
* Will collide with any collidable types including characters and items.
|
|
* @param start The start position of the ray to cast
|
|
* @param direction The direction of the ray to cast (this will automatically be converted into a unit vector if it isn't already)
|
|
* @param length The length of the ray to cast
|
|
* @return The position, in world coordinates, of the closest collision of the way, or null if it did not collide with anything.
|
|
*/
|
|
public Vector3d rayCastPosition(Vector3d start, Vector3d direction, double length){
|
|
spaceLock.lock();
|
|
Vector3d unitDir = new Vector3d(direction).normalize();
|
|
//create the ray
|
|
DRay ray = OdeHelper.createRay(space, length);
|
|
ray.set(start.x, start.y, start.z, unitDir.x, unitDir.y, unitDir.z);
|
|
//collide
|
|
RayCastCallbackData data = new RayCastCallbackData(bodyPointerMap, null);
|
|
rayCastCallback.setLength(length);
|
|
space.collide2(ray, data, rayCastCallback);
|
|
//destroy ray
|
|
ray.destroy();
|
|
spaceLock.unlock();
|
|
return data.collisionPosition;
|
|
}
|
|
|
|
/**
|
|
* Ray casts into the scene and gets the position of the closest collision's position in world space.
|
|
* @param start The start position of the ray to cast
|
|
* @param direction The direction of the ray to cast
|
|
* @param length The length of the ray to cast
|
|
* @param typeMask The mask of types to collide the ray with
|
|
* @return The position, in world coordinates, of the closest collision of the way, or null if it did not collide with anything.
|
|
*/
|
|
public Vector3d rayCastPositionMasked(Vector3d start, Vector3d direction, double length, List<String> typeMask){
|
|
spaceLock.lock();
|
|
Vector3d unitDir = new Vector3d(direction).normalize();
|
|
//create the ray
|
|
DRay ray = OdeHelper.createRay(space, length);
|
|
ray.set(start.x, start.y, start.z, unitDir.x, unitDir.y, unitDir.z);
|
|
//collide
|
|
RayCastCallbackData data = new RayCastCallbackData(bodyPointerMap, typeMask);
|
|
rayCastCallback.setLength(length);
|
|
space.collide2(ray, data, rayCastCallback);
|
|
//destroy ray
|
|
ray.destroy();
|
|
spaceLock.unlock();
|
|
return data.collisionPosition;
|
|
}
|
|
|
|
/**
|
|
* Registers a body
|
|
* @param body The body
|
|
*/
|
|
public void registerPhysicsObject(DBody body){
|
|
if(!bodies.contains(body)){
|
|
bodies.add(body);
|
|
if(bodies.size() > COLLIDABLE_COUNT_WARNING_THRESHOLD){
|
|
LoggerInterface.loggerEngine.WARNING("Body count has superceded the warning threshold! " + bodies.size());
|
|
}
|
|
// OdeHelper.createBody(world);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Destroys a body and all geometry under the body
|
|
* @param body The DBody to destroy
|
|
*/
|
|
protected void destroyDBody(DBody body){
|
|
spaceLock.lock();
|
|
try {
|
|
if(bodies.contains(body)){
|
|
bodies.remove(body);
|
|
}
|
|
//destroy all geometries
|
|
Iterator<DGeom> geomIterator = body.getGeomIterator();
|
|
while(geomIterator.hasNext()){
|
|
DGeom geom = geomIterator.next();
|
|
space.remove(geom);
|
|
geom.DESTRUCTOR();
|
|
geom.destroy();
|
|
}
|
|
//destroy all joints
|
|
for(int i = 0; i < body.getNumJoints(); i++){
|
|
DJoint joint = body.getJoint(i);
|
|
joint.DESTRUCTOR();
|
|
joint.destroy();
|
|
}
|
|
//destroy actual body
|
|
body.destroy();
|
|
} catch (NullPointerException ex){
|
|
LoggerInterface.loggerEngine.ERROR(ex);
|
|
spaceLock.unlock();
|
|
}
|
|
spaceLock.unlock();
|
|
}
|
|
|
|
/**
|
|
* Destroys the physics on an entity
|
|
* @param e The entity
|
|
*/
|
|
public void destroyPhysics(Entity e){
|
|
//make uncollidable
|
|
if(PhysicsEntityUtils.containsDBody(e)){
|
|
DBody rigidBody = PhysicsEntityUtils.getDBody(e);
|
|
if(rigidBody == null){
|
|
throw new Error("DBody key set to null rigid body! " + rigidBody);
|
|
}
|
|
this.deregisterCollisionObject(rigidBody,PhysicsEntityUtils.getCollidable(e));
|
|
e.removeData(EntityDataStrings.PHYSICS_COLLISION_BODY);
|
|
this.destroyDBody(rigidBody);
|
|
}
|
|
if(ServerPhysicsSyncTree.hasTree(e)){
|
|
ServerPhysicsSyncTree.detachTree(e, ServerPhysicsSyncTree.getTree(e));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Creates a trimesh from a given set of vertices and indices
|
|
* @param verts The vertices
|
|
* @param indices The indices
|
|
* @return The DTriMesh
|
|
*/
|
|
protected DTriMesh createTrimeshGeom(float[] verts, int[] indices, long categoryBits){
|
|
spaceLock.lock();
|
|
DTriMeshData data = OdeHelper.createTriMeshData();
|
|
data.build(verts, indices);
|
|
final int preprocessFlags =
|
|
(1 << DTriMeshData.dTRIDATAPREPROCESS_BUILD.CONCAVE_EDGES) |
|
|
(1 << DTriMeshData.dTRIDATAPREPROCESS_BUILD.FACE_ANGLES) |
|
|
(1 << DTriMeshData.dTRIDATAPREPROCESS_FACE_ANGLES_EXTRA__MAX)
|
|
;
|
|
data.preprocess2(preprocessFlags,null);
|
|
DTriMesh rVal = OdeHelper.createTriMesh(space, data);
|
|
rVal.setTrimeshData(data);
|
|
rVal.setCategoryBits(categoryBits);
|
|
spaceLock.unlock();
|
|
return rVal;
|
|
}
|
|
|
|
/**
|
|
* Creates a cube geometry. Dimensions vector control the total length of the x, y, and z dimensions respectively.
|
|
* @param dimensions The dimensions of the box
|
|
* @return The DBox
|
|
*/
|
|
protected DBox createCubeGeom(Vector3d dimensions, long categoryBits){
|
|
spaceLock.lock();
|
|
DBox boxGeom = OdeHelper.createBox(space, dimensions.x, dimensions.y, dimensions.z);
|
|
boxGeom.setCategoryBits(categoryBits);
|
|
spaceLock.unlock();
|
|
return boxGeom;
|
|
}
|
|
|
|
/**
|
|
* Creates a cylinder geometry in the physics space
|
|
* @param dimensions The dimensions of the cylinder. X is the radius, y is the total height.
|
|
* @return The cylinder geometry
|
|
*/
|
|
protected DCylinder createCylinderGeom(double radius, double length, long categoryBits){
|
|
spaceLock.lock();
|
|
DCylinder cylinderGeom = OdeHelper.createCylinder(space, radius, length);
|
|
cylinderGeom.setCategoryBits(categoryBits);
|
|
spaceLock.unlock();
|
|
return cylinderGeom;
|
|
}
|
|
|
|
/**
|
|
* Creates a sphere geometry in the physics space
|
|
* @param radius The radius of the sphere
|
|
* @return The sphere geometry
|
|
*/
|
|
protected DSphere createSphereGeom(double radius, long categoryBits){
|
|
spaceLock.lock();
|
|
DSphere sphereGeom = OdeHelper.createSphere(space, radius);
|
|
sphereGeom.setCategoryBits(categoryBits);
|
|
spaceLock.unlock();
|
|
return sphereGeom;
|
|
}
|
|
|
|
/**
|
|
* Creates a capsule geometry in the physics space
|
|
* @param radius The radius of the capsule
|
|
* @param length The length of the capsule
|
|
* @return The capsule geometry
|
|
*/
|
|
protected DCapsule createCapsuleGeom(double radius, double length, long categoryBits){
|
|
spaceLock.lock();
|
|
DCapsule capsuleGeom = OdeHelper.createCapsule(space, radius, length);
|
|
capsuleGeom.setCategoryBits(categoryBits);
|
|
spaceLock.unlock();
|
|
return capsuleGeom;
|
|
}
|
|
|
|
/**
|
|
* Creates a DBody. Can optionally be passed DGeom objects to be attached to the body when it is created.
|
|
* @param geom The geometry objects to attach to the body on creation
|
|
* @return The DBody
|
|
*/
|
|
protected DBody createDBody(DGeom ...geom){
|
|
spaceLock.lock();
|
|
DBody body = OdeHelper.createBody(world);
|
|
body.setDamping(DEFAULT_LINEAR_DAMPING, DEFAULT_ANGULAR_DAMPING);
|
|
body.setMaxAngularSpeed(DEFAULT_MAX_ANGULAR_SPEED);
|
|
if(geom != null){
|
|
for(int i = 0; i < geom.length; i++){
|
|
if(geom != null){
|
|
geom[i].setBody(body);
|
|
}
|
|
}
|
|
}
|
|
spaceLock.unlock();
|
|
return body;
|
|
}
|
|
|
|
/**
|
|
* Creates a DMass and attaches a body to it
|
|
* @param massValue The amount of mass for the object
|
|
* @param radius The radius of the cylinder
|
|
* @param length The length of the cylinder
|
|
* @param body The DBody to attach the mass to
|
|
* @return The DMass
|
|
*/
|
|
protected DMass createCylinderMass(double massValue, double radius, double length, DBody body, Vector3d offset, Quaterniond rotation){
|
|
spaceLock.lock();
|
|
DMass mass = OdeHelper.createMass();
|
|
mass.setCylinder(massValue, 2, radius, length);
|
|
body.setMass(mass);
|
|
spaceLock.unlock();
|
|
return mass;
|
|
}
|
|
|
|
/**
|
|
* Creates a DMass and attaches a body to it
|
|
* @param massValue The amount of mass for the object
|
|
* @param dims The dimensions of the box
|
|
* @param body The DBody to attach the mass to
|
|
* @return The DMass
|
|
*/
|
|
protected DMass createBoxMass(double massValue, Vector3d dims, DBody body, Vector3d offset, Quaterniond rotation){
|
|
spaceLock.lock();
|
|
DMass mass = OdeHelper.createMass();
|
|
mass.setBox(massValue, dims.x, dims.y, dims.z);
|
|
body.setMass(mass);
|
|
spaceLock.unlock();
|
|
return mass;
|
|
}
|
|
|
|
/**
|
|
* Creates a DMass and attaches a body to it
|
|
* @param massValue The amount of mass for the object
|
|
* @param radius The radius of the capsule
|
|
* @param length The length of the capsule
|
|
* @param body The DBody to attach the mass to
|
|
* @return The DMass
|
|
*/
|
|
protected DMass createCapsuleMass(double massValue, double radius, double length, DBody body, Vector3d offset, Quaterniond rotation){
|
|
spaceLock.lock();
|
|
DMass mass = OdeHelper.createMass();
|
|
mass.setCapsule(massValue, 2, radius, length);
|
|
body.setMass(mass);
|
|
spaceLock.unlock();
|
|
return mass;
|
|
}
|
|
|
|
/**
|
|
* Sets the auto disable flags for the body
|
|
* @param body The body
|
|
* @param autoDisable whether auto disable should be used or not
|
|
* @param linearThreshold The linear velocity threshold to disable under
|
|
* @param angularThreshold The angular velocity threshold to disable under
|
|
* @param steps The number of steps the body must be beneath the threshold before disabling
|
|
*/
|
|
protected void setAutoDisableFlags(DBody body, boolean autoDisable, double linearThreshold, double angularThreshold, int steps){
|
|
spaceLock.lock();
|
|
body.setAutoDisableFlag(autoDisable);
|
|
body.setAutoDisableLinearThreshold(0.1);
|
|
body.setAutoDisableAngularThreshold(angularThreshold);
|
|
body.setAutoDisableSteps(steps);
|
|
spaceLock.unlock();
|
|
}
|
|
|
|
/**
|
|
* Sets the damping of the body
|
|
* @param body The body
|
|
* @param linearDamping The linear damping
|
|
* @param angularDamping The angular damping
|
|
*/
|
|
protected void setDamping(DBody body, double linearDamping, double angularDamping){
|
|
spaceLock.lock();
|
|
body.setDamping(linearDamping, angularDamping);
|
|
spaceLock.unlock();
|
|
}
|
|
|
|
/**
|
|
* Sets the transform on a body
|
|
* @param body The body
|
|
* @param position The position
|
|
* @param rotation The rotation
|
|
*/
|
|
protected void setBodyTransform(DBody body, Vector3d position, Quaterniond rotation){
|
|
spaceLock.lock();
|
|
body.setPosition(position.x, position.y, position.z);
|
|
body.setQuaternion(PhysicsUtils.jomlQuatToOdeQuat(rotation));
|
|
spaceLock.unlock();
|
|
}
|
|
|
|
/**
|
|
* Synchronizes the data on a body
|
|
* @param body The body
|
|
* @param position The position
|
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* @param rotation The rotation
|
|
* @param linearVel The linear velocity
|
|
* @param angularVel The angular velocity
|
|
* @param linearForce The linear force
|
|
* @param angularForce The angular force
|
|
*/
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|
protected void synchronizeData(DBody body, Vector3d position, Quaterniond rotation, Vector3d linearVel, Vector3d angularVel, Vector3d linearForce, Vector3d angularForce){
|
|
if(body != null){
|
|
spaceLock.lock();
|
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body.setPosition(position.x, position.y, position.z);
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|
body.setQuaternion(PhysicsUtils.jomlQuatToOdeQuat(rotation));
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|
body.setLinearVel(PhysicsUtils.jomlVecToOdeVec(linearVel));
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|
body.setAngularVel(PhysicsUtils.jomlVecToOdeVec(angularVel));
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|
body.setForce(PhysicsUtils.jomlVecToOdeVec(linearForce));
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|
body.setTorque(PhysicsUtils.jomlVecToOdeVec(angularForce));
|
|
spaceLock.unlock();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets the transform on a body
|
|
* @param body The body
|
|
* @param position The position
|
|
* @param rotation The rotation
|
|
* @param scale The scale
|
|
*/
|
|
protected void setBodyTransform(DBody body, CollidableTemplate template, Vector3d position, Quaterniond rotation, Vector3d scale){
|
|
spaceLock.lock();
|
|
body.setPosition(position.x, position.y, position.z);
|
|
body.setQuaternion(PhysicsUtils.jomlQuatToOdeQuat(rotation));
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|
DGeom firstGeom = body.getFirstGeom();
|
|
if(firstGeom instanceof DCylinder){
|
|
((DCylinder)firstGeom).setParams(template.getDimension1() * scale.x,template.getDimension2() * scale.y);
|
|
} else if(firstGeom instanceof DBox){
|
|
((DBox)firstGeom).setLengths(template.getDimension1() * scale.x,template.getDimension2() * scale.y,template.getDimension3() * scale.z);
|
|
} else if(firstGeom instanceof DCapsule){
|
|
((DCapsule)firstGeom).setParams(template.getDimension1() * scale.x,template.getDimension2() * scale.y);
|
|
}
|
|
spaceLock.unlock();
|
|
}
|
|
|
|
/**
|
|
* Sets the transform of a geometry
|
|
* @param geom The geometry
|
|
* @param position The position
|
|
* @param rotation The rotation
|
|
*/
|
|
protected void setGeomTransform(DGeom geom, Vector3d position, Quaterniond rotation){
|
|
spaceLock.lock();
|
|
geom.setOffsetWorldPosition(position.x, position.y, position.z);
|
|
geom.setOffsetQuaternion(PhysicsUtils.jomlQuatToOdeQuat(rotation));
|
|
spaceLock.unlock();
|
|
}
|
|
|
|
/**
|
|
* Corrects the initial axis of eg cylinders or capsules
|
|
* @param geom the geometry to correct
|
|
*/
|
|
protected void setOffsetRotation(DGeom geom){
|
|
spaceLock.lock();
|
|
geom.setOffsetRotation(CollisionBodyCreation.AXIS_CORRECTION_MATRIX);
|
|
spaceLock.unlock();
|
|
}
|
|
|
|
/**
|
|
* Gets the position of the body in a thread-safe way
|
|
* @param body The body to get the position of
|
|
* @return The position
|
|
*/
|
|
protected Vector3d getBodyPosition(DBody body){
|
|
Vector3d rVal = null;
|
|
spaceLock.lock();
|
|
rVal = PhysicsUtils.odeVecToJomlVec(body.getPosition());
|
|
spaceLock.unlock();
|
|
return rVal;
|
|
}
|
|
|
|
/**
|
|
* Gets the rotation of the body in a thread-safe way
|
|
* @param body The body to get the rotation of
|
|
* @return The rotation
|
|
*/
|
|
protected Quaterniond getBodyRotation(DBody body){
|
|
Quaterniond rVal = null;
|
|
spaceLock.lock();
|
|
rVal = PhysicsUtils.odeQuatToJomlQuat(body.getQuaternion());
|
|
spaceLock.unlock();
|
|
return rVal;
|
|
}
|
|
|
|
/**
|
|
* Sets a body to be kinematic (infinite mass, not affected by gravity)
|
|
* @param body The body to set
|
|
*/
|
|
protected void setKinematic(DBody body){
|
|
spaceLock.lock();
|
|
body.setKinematic();
|
|
spaceLock.unlock();
|
|
}
|
|
|
|
/**
|
|
* Sets the gravity mode of the body
|
|
* @param body the body
|
|
* @param gravityMode the gravity mode
|
|
*/
|
|
protected void setGravityMode(DBody body, boolean gravityMode){
|
|
spaceLock.lock();
|
|
body.setGravityMode(gravityMode);
|
|
spaceLock.unlock();
|
|
}
|
|
|
|
/**
|
|
* Sets the offset position of the first geometry in the body
|
|
* @param body The body
|
|
* @param offsetVector The offset position
|
|
*/
|
|
protected void setOffsetPosition(DBody body, Vector3d offsetVector){
|
|
spaceLock.lock();
|
|
body.getGeomIterator().next().setOffsetPosition(offsetVector.x,offsetVector.y,offsetVector.z);
|
|
spaceLock.unlock();
|
|
}
|
|
|
|
/**
|
|
* Sets whether the body is angularly static or not
|
|
* @param body The body
|
|
* @param angularlyStatic true if angularly static, false otherwise
|
|
*/
|
|
protected void setAngularlyStatic(DBody body, boolean angularlyStatic){
|
|
spaceLock.lock();
|
|
if(angularlyStatic){
|
|
body.setMaxAngularSpeed(0);
|
|
} else {
|
|
body.setMaxAngularSpeed(DEFAULT_MAX_ANGULAR_SPEED);
|
|
}
|
|
spaceLock.unlock();
|
|
}
|
|
|
|
/**
|
|
* Removes the geometry from the body
|
|
* @param body the body
|
|
* @param geom the geometry
|
|
*/
|
|
protected void removeGeometryFromBody(DBody body, DGeom geom){
|
|
geom.setBody(null);
|
|
}
|
|
|
|
/**
|
|
* Destroys a geometry
|
|
* @param geom The geometry
|
|
*/
|
|
protected void destroyGeom(DGeom geom){
|
|
spaceLock.lock();
|
|
this.space.remove(geom);
|
|
geom.DESTRUCTOR();
|
|
geom.destroy();
|
|
spaceLock.unlock();
|
|
}
|
|
|
|
/**
|
|
* Attaches a geom to a body
|
|
* @param body the body
|
|
* @param geom the geom
|
|
*/
|
|
protected void attachGeomToBody(DBody body, DGeom geom){
|
|
geom.setBody(body);
|
|
}
|
|
|
|
|
|
/**
|
|
* A callback for resolving collisions between two entities
|
|
*/
|
|
public interface CollisionResolutionCallback {
|
|
/**
|
|
* Resolves a collision between two collidables in the engine
|
|
* @param contactGeom the ode4j contact geom
|
|
* @param geom1 The first geometry
|
|
* @param geom2 The second geometry
|
|
* @param impactor The collidable initiating the contact
|
|
* @param receiver The collidable recieving the contact
|
|
* @param normal The normal of the collision
|
|
* @param localPosition The local position of the collision
|
|
* @param worldPos The world position of the collision
|
|
* @param magnitude The magnitude of the collision
|
|
*/
|
|
public void resolve(DContactGeom contactGeom, DGeom geom1, DGeom geom2, Collidable impactor, Collidable receiver, Vector3d normal, Vector3d localPosition, Vector3d worldPos, float magnitude);
|
|
}
|
|
|
|
}
|