40 lines
1.5 KiB
Java
40 lines
1.5 KiB
Java
package electrosphere.renderer;
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import org.joml.Matrix4f;
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import org.joml.Quaternionf;
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import org.joml.Vector3f;
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/**
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*
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* @author satellite
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*/
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public class Camera {
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public Vector3f pos_Center = new Vector3f(0,0,0);
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// public Vector3f pos_Front = new Vector3f(0,0,0);
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// public Vector3f pos_Top = new Vector3f(0,0,0);
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public Quaternionf rotation = new Quaternionf();
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public Camera(){
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}
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public void apply_camera(Camera c){
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pos_Center = new Vector3f(c.pos_Center);
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rotation = new Quaternionf(c.rotation);
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}
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public Matrix4f get_view_matrix(){
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Matrix4f rVal = new Matrix4f();
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// rVal.setLookAt(pos_Center, pos_Front, pos_Top);
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Vector3f up = new Vector3f(pos_Center);
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//new Vector3f(pos_Center).add(new Quaternionf(rotation)..transform(new Vector3f(1,0,0)))
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Vector3f up_modifier = new Vector3f(1,0,0);
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Quaternionf up_transformation = new Quaternionf(rotation);
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up_transformation.rotateAxis((float)Math.PI/2.0f, new Vector3f(up).cross(new Vector3f(0,1,0))); // the hard part is getting the axis in this logic to correspond to the vertical
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up = up.add(up_transformation.transform(up_modifier));
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rVal.setLookAt(pos_Center, //where our camera is
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new Vector3f(pos_Center).add(rotation.transform(new Vector3f(1,0,0))), //where our camera wants to look
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up); //where "up" is relative to our camera
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return rVal;
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}
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}
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