1 package com.badlogic.gdx.graphics.g3d.particles.values; 2 3 import com.badlogic.gdx.graphics.Mesh; 4 import com.badlogic.gdx.graphics.VertexAttributes.Usage; 5 import com.badlogic.gdx.graphics.g3d.Model; 6 import com.badlogic.gdx.math.MathUtils; 7 import com.badlogic.gdx.math.Vector3; 8 9 /** Encapsulate the formulas to spawn a particle on a mesh shape. 10 * @author Inferno */ 11 public final class UnweightedMeshSpawnShapeValue extends MeshSpawnShapeValue { 12 private float[] vertices; 13 private short[] indices; 14 private int positionOffset, vertexSize, vertexCount, triangleCount; 15 16 public UnweightedMeshSpawnShapeValue (UnweightedMeshSpawnShapeValue value) { 17 super(value); 18 load(value); 19 } 20 21 public UnweightedMeshSpawnShapeValue () {} 22 23 @Override 24 public void setMesh(Mesh mesh, Model model){ 25 super.setMesh(mesh, model); 26 vertexSize = mesh.getVertexSize()/4; 27 positionOffset = mesh.getVertexAttribute(Usage.Position).offset/4; 28 int indicesCount = mesh.getNumIndices(); 29 if(indicesCount >0){ 30 indices = new short[indicesCount]; 31 mesh.getIndices(indices); 32 triangleCount = indices.length/3; 33 } 34 else indices = null; 35 vertexCount = mesh.getNumVertices(); 36 vertices = new float[ vertexCount* vertexSize]; 37 mesh.getVertices(vertices); 38 } 39 40 @Override 41 public void spawnAux (Vector3 vector, float percent) { 42 if(indices == null){ 43 //Triangles 44 int triangleIndex = MathUtils.random(vertexCount -3)*vertexSize; 45 int p1Offset = triangleIndex+positionOffset, 46 p2Offset = p1Offset + vertexSize, 47 p3Offset = p2Offset + vertexSize; 48 float x1 = vertices[p1Offset], y1 = vertices[p1Offset+1], z1 = vertices[p1Offset+2], 49 x2 = vertices[p2Offset], y2 = vertices[p2Offset+1], z2 = vertices[p2Offset+2], 50 x3 = vertices[p3Offset], y3 = vertices[p3Offset+1], z3 = vertices[p3Offset+2]; 51 Triangle.pick(x1, y1, z1, x2, y2, z2, x3, y3, z3, vector); 52 } 53 else { 54 //Indices 55 int triangleIndex = MathUtils.random(triangleCount-1)*3; 56 int p1Offset = indices[triangleIndex]*vertexSize + positionOffset, 57 p2Offset = indices[triangleIndex+1]*vertexSize + positionOffset, 58 p3Offset = indices[triangleIndex+2]*vertexSize + positionOffset; 59 float x1 = vertices[p1Offset], y1 = vertices[p1Offset+1], z1 = vertices[p1Offset+2], 60 x2 = vertices[p2Offset], y2 = vertices[p2Offset+1], z2 = vertices[p2Offset+2], 61 x3 = vertices[p3Offset], y3 = vertices[p3Offset+1], z3 = vertices[p3Offset+2]; 62 Triangle.pick(x1, y1, z1, x2, y2, z2, x3, y3, z3, vector); 63 } 64 } 65 66 @Override 67 public SpawnShapeValue copy () { 68 return new UnweightedMeshSpawnShapeValue(this); 69 } 70 71 } 72
