1 package com.jme3.effect.shapes; 2 3 import com.jme3.math.FastMath; 4 import com.jme3.math.Vector3f; 5 import com.jme3.scene.Mesh; 6 import java.util.List; 7 8 /** 9 * This emiter shape emits the particles from the given shape's interior constrained by its convex hull 10 * (a geometry that tightly wraps the mesh). So in case of multiple meshes some vertices may appear 11 * in a space between them. 12 * @author Marcin Roguski (Kaelthas) 13 */ 14 public class EmitterMeshConvexHullShape extends EmitterMeshFaceShape { 15 16 /** 17 * Empty constructor. Sets nothing. 18 */ EmitterMeshConvexHullShape()19 public EmitterMeshConvexHullShape() { 20 } 21 22 /** 23 * Constructor. It stores a copy of vertex list of all meshes. 24 * @param meshes 25 * a list of meshes that will form the emitter's shape 26 */ EmitterMeshConvexHullShape(List<Mesh> meshes)27 public EmitterMeshConvexHullShape(List<Mesh> meshes) { 28 super(meshes); 29 } 30 31 /** 32 * This method fills the point with coordinates of randomly selected point inside a convex hull 33 * of randomly selected mesh. 34 * @param store 35 * the variable to store with coordinates of randomly selected selected point inside a convex hull 36 * of randomly selected mesh 37 */ 38 @Override getRandomPoint(Vector3f store)39 public void getRandomPoint(Vector3f store) { 40 super.getRandomPoint(store); 41 // now move the point from the meshe's face towards the center of the mesh 42 // the center is in (0, 0, 0) in the local coordinates 43 store.multLocal(FastMath.nextRandomFloat()); 44 } 45 46 /** 47 * This method fills the point with coordinates of randomly selected point inside a convex hull 48 * of randomly selected mesh. 49 * The normal param is not used. 50 * @param store 51 * the variable to store with coordinates of randomly selected selected point inside a convex hull 52 * of randomly selected mesh 53 * @param normal 54 * not used in this class 55 */ 56 @Override getRandomPointAndNormal(Vector3f store, Vector3f normal)57 public void getRandomPointAndNormal(Vector3f store, Vector3f normal) { 58 super.getRandomPointAndNormal(store, normal); 59 // now move the point from the meshe's face towards the center of the mesh 60 // the center is in (0, 0, 0) in the local coordinates 61 store.multLocal(FastMath.nextRandomFloat()); 62 } 63 } 64