package electrosphere.game.cell;

import electrosphere.entity.Entity;
import electrosphere.entity.EntityUtil;
import electrosphere.main.Globals;
import electrosphere.renderer.Model;
import electrosphere.renderer.ModelUtils;
import electrosphere.renderer.ShaderProgram;
import electrosphere.util.Utilities;
import org.joml.Vector3f;

/**
 *
 * @author satellite
 */
public class DrawCell {
    float[][] drawArray;
    int drawWidth;
    
    
    int cellX;
    int cellY;
    int cellWidth;
    
    Entity modelEntity;
    
    ShaderProgram program;
    
    public DrawCell(float[][] drawArray, int drawWidth, int cellX, int cellY, int cellWidth, ShaderProgram program){
        this.drawArray = drawArray;
        this.drawWidth = drawWidth;
        this.cellX = cellX;
        this.cellY = cellY;
        this.cellWidth = cellWidth;
        this.program = program;
    }
    
    /**
     * Generates a drawable entity based on this chunk
     * @param stride The stride between indices used to generate "sparse" meshes
     */
    public void generateDrawableEntity(int stride){
        if(modelEntity != null){
            Globals.entityManager.deregisterEntity(modelEntity);
        }
        Model terrainModel = ModelUtils.createTerrainModelPrecomputedShader(drawArray, program, stride);
        modelEntity = EntityUtil.spawnDrawableEntity(terrainModel);
//        System.out.println("New cell @ " + cellX * cellWidth + "," + cellY * cellWidth);
        EntityUtil.getEntityPosition(modelEntity).set(new Vector3f(cellX * cellWidth, 0, cellY * cellWidth));
    }
    
    public void retireCell(){
        EntityUtil.cleanUpDrawableEntity(modelEntity);
    }
    
}