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* Copyright (c) 2009-2015 jMonkeyEngine
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package com.jme3.scene.plugins.fbx.mesh;
import com.jme3.animation.Bone;
import com.jme3.animation.Skeleton;
import com.jme3.asset.AssetManager;
import com.jme3.math.ColorRGBA;
import com.jme3.math.Vector2f;
import com.jme3.math.Vector3f;
import com.jme3.scene.Mesh;
import com.jme3.scene.plugins.IrUtils;
import com.jme3.scene.plugins.IrBoneWeightIndex;
import com.jme3.scene.plugins.IrMesh;
import com.jme3.scene.plugins.IrPolygon;
import com.jme3.scene.plugins.IrVertex;
import com.jme3.scene.plugins.fbx.anim.FbxCluster;
import com.jme3.scene.plugins.fbx.anim.FbxLimbNode;
import com.jme3.scene.plugins.fbx.anim.FbxSkinDeformer;
import com.jme3.scene.plugins.fbx.file.FbxElement;
import com.jme3.scene.plugins.fbx.obj.FbxObject;
import com.jme3.scene.plugins.fbx.node.FbxNodeAttribute;
import com.jme3.util.IntMap;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
public final class FbxMesh extends FbxNodeAttribute<IntMap<Mesh>> {
private static final Logger logger = Logger.getLogger(FbxMesh.class.getName());
private FbxPolygon[] polygons;
private int[] edges;
private FbxLayerElement[] layerElements;
private Vector3f[] positions;
private FbxLayer[] layers;
private ArrayList<Integer>[] boneIndices;
private ArrayList<Float>[] boneWeights;
private FbxSkinDeformer skinDeformer;
public FbxMesh(AssetManager assetManager, String sceneFolderName) {
super(assetManager, sceneFolderName);
}
@Override
public void fromElement(FbxElement element) {
super.fromElement(element);
List<FbxLayerElement> layerElementsList = new ArrayList<FbxLayerElement>();
List<FbxLayer> layersList = new ArrayList<FbxLayer>();
for (FbxElement e : element.children) {
if (e.id.equals("Vertices")) {
setPositions(FbxMeshUtil.getDoubleArray(e));
} else if (e.id.equals("PolygonVertexIndex")) {
setPolygonVertexIndices(FbxMeshUtil.getIntArray(e));
} else if (e.id.equals("Edges")) {
setEdges(FbxMeshUtil.getIntArray(e));
} else if (e.id.startsWith("LayerElement")) {
layerElementsList.add(FbxLayerElement.fromElement(e));
} else if (e.id.equals("Layer")) {
layersList.add(FbxLayer.fromElement(e));
}
}
for (FbxLayer layer : layersList) {
layer.setLayerElements(layerElementsList);
}
layerElements = new FbxLayerElement[layerElementsList.size()];
layerElementsList.toArray(layerElements);
layers = new FbxLayer[layersList.size()];
layersList.toArray(layers);
}
public FbxSkinDeformer getSkinDeformer() {
return skinDeformer;
}
public void applyCluster(FbxCluster cluster) {
if (boneIndices == null) {
boneIndices = new ArrayList[positions.length];
boneWeights = new ArrayList[positions.length];
}
FbxLimbNode limb = cluster.getLimb();
Bone bone = limb.getJmeBone();
Skeleton skeleton = limb.getSkeletonHolder().getJmeSkeleton();
int boneIndex = skeleton.getBoneIndex(bone);
int[] positionIndices = cluster.getVertexIndices();
double[] weights = cluster.getWeights();
for (int i = 0; i < positionIndices.length; i++) {
int positionIndex = positionIndices[i];
float boneWeight = (float)weights[i];
ArrayList<Integer> boneIndicesForVertex = boneIndices[positionIndex];
ArrayList<Float> boneWeightsForVertex = boneWeights[positionIndex];
if (boneIndicesForVertex == null) {
boneIndicesForVertex = new ArrayList<Integer>();
boneWeightsForVertex = new ArrayList<Float>();
boneIndices[positionIndex] = boneIndicesForVertex;
boneWeights[positionIndex] = boneWeightsForVertex;
}
boneIndicesForVertex.add(boneIndex);
boneWeightsForVertex.add(boneWeight);
}
}
@Override
public void connectObject(FbxObject object) {
if (object instanceof FbxSkinDeformer) {
if (skinDeformer != null) {
logger.log(Level.WARNING, "This mesh already has a skin deformer attached. Ignoring.");
return;
}
skinDeformer = (FbxSkinDeformer) object;
} else {
unsupportedConnectObject(object);
}
}
@Override
public void connectObjectProperty(FbxObject object, String property) {
unsupportedConnectObjectProperty(object, property);
}
private void setPositions(double[] positions) {
this.positions = FbxLayerElement.toVector3(positions);
}
private void setEdges(int[] edges) {
this.edges = edges;
// TODO: ...
}
private void setPolygonVertexIndices(int[] polygonVertexIndices) {
List<FbxPolygon> polygonList = new ArrayList<FbxPolygon>();
boolean finishPolygon = false;
List<Integer> vertexIndices = new ArrayList<Integer>();
for (int i = 0; i < polygonVertexIndices.length; i++) {
int vertexIndex = polygonVertexIndices[i];
if (vertexIndex < 0) {
vertexIndex ^= -1;
finishPolygon = true;
}
vertexIndices.add(vertexIndex);
if (finishPolygon) {
finishPolygon = false;
polygonList.add(FbxPolygon.fromIndices(vertexIndices));
vertexIndices.clear();
}
}
polygons = new FbxPolygon[polygonList.size()];
polygonList.toArray(polygons);
}
private static IrBoneWeightIndex[] toBoneWeightIndices(List<Integer> boneIndices, List<Float> boneWeights) {
IrBoneWeightIndex[] boneWeightIndices = new IrBoneWeightIndex[boneIndices.size()];
for (int i = 0; i < boneIndices.size(); i++) {
boneWeightIndices[i] = new IrBoneWeightIndex(boneIndices.get(i), boneWeights.get(i));
}
return boneWeightIndices;
}
@Override
protected IntMap<Mesh> toJmeObject() {
// Load clusters from SkinDeformer
if (skinDeformer != null) {
for (FbxCluster cluster : skinDeformer.getJmeObject()) {
applyCluster(cluster);
}
}
IrMesh irMesh = toIRMesh();
// Trim bone weights to 4 weights per vertex.
IrUtils.trimBoneWeights(irMesh);
// Convert tangents / binormals to tangents with parity.
IrUtils.toTangentsWithParity(irMesh);
// Triangulate quads.
IrUtils.triangulate(irMesh);
// Split meshes by material indices.
IntMap<IrMesh> irMeshes = IrUtils.splitByMaterial(irMesh);
// Create a jME3 Mesh for each material index.
IntMap<Mesh> jmeMeshes = new IntMap<Mesh>();
for (IntMap.Entry<IrMesh> irMeshEntry : irMeshes) {
Mesh jmeMesh = IrUtils.convertIrMeshToJmeMesh(irMeshEntry.getValue());
jmeMeshes.put(irMeshEntry.getKey(), jmeMesh);
}
if (jmeMeshes.size() == 0) {
// When will this actually happen? Not sure.
logger.log(Level.WARNING, "Empty FBX mesh found (unusual).");
}
// IMPORTANT: If we have a -1 entry, those are triangles
// with no material indices.
// It makes sense only if the mesh uses a single material!
if (jmeMeshes.containsKey(-1) && jmeMeshes.size() > 1) {
logger.log(Level.WARNING, "Mesh has polygons with no material "
+ "indices (unusual) - they will use material index 0.");
}
return jmeMeshes;
}
/**
* Convert FBXMesh to IRMesh.
*/
public IrMesh toIRMesh() {
IrMesh newMesh = new IrMesh();
newMesh.polygons = new IrPolygon[polygons.length];
int polygonVertexIndex = 0;
int positionIndex = 0;
FbxLayer layer0 = layers[0];
FbxLayer layer1 = layers.length > 1 ? layers[1] : null;
for (int i = 0; i < polygons.length; i++) {
FbxPolygon polygon = polygons[i];
IrPolygon irPolygon = new IrPolygon();
irPolygon.vertices = new IrVertex[polygon.indices.length];
for (int j = 0; j < polygon.indices.length; j++) {
positionIndex = polygon.indices[j];
IrVertex irVertex = new IrVertex();
irVertex.pos = positions[positionIndex];
if (layer0 != null) {
irVertex.norm = (Vector3f) layer0.getVertexData(FbxLayerElement.Type.Normal, i, polygonVertexIndex, positionIndex, 0);
irVertex.tang = (Vector3f) layer0.getVertexData(FbxLayerElement.Type.Tangent, i, polygonVertexIndex, positionIndex, 0);
irVertex.bitang = (Vector3f) layer0.getVertexData(FbxLayerElement.Type.Binormal, i, polygonVertexIndex, positionIndex, 0);
irVertex.uv0 = (Vector2f) layer0.getVertexData(FbxLayerElement.Type.UV, i, polygonVertexIndex, positionIndex, 0);
irVertex.color = (ColorRGBA) layer0.getVertexData(FbxLayerElement.Type.Color, i, polygonVertexIndex, positionIndex, 0);
irVertex.material = (Integer) layer0.getVertexData(FbxLayerElement.Type.Material, i, polygonVertexIndex, positionIndex, 0);
irVertex.smoothing = (Integer) layer0.getVertexData(FbxLayerElement.Type.Smoothing, i, polygonVertexIndex, positionIndex, 0);
}
if (layer1 != null) {
irVertex.uv1 = (Vector2f) layer1.getVertexData(FbxLayerElement.Type.UV, i,
polygonVertexIndex, positionIndex, 0);
}
if (boneIndices != null) {
ArrayList<Integer> boneIndicesForVertex = boneIndices[positionIndex];
ArrayList<Float> boneWeightsForVertex = boneWeights[positionIndex];
if (boneIndicesForVertex != null) {
irVertex.boneWeightsIndices = toBoneWeightIndices(boneIndicesForVertex, boneWeightsForVertex);
}
}
irPolygon.vertices[j] = irVertex;
polygonVertexIndex++;
}
newMesh.polygons[i] = irPolygon;
}
// Ensure "inspection vertex" specifies that mesh has bone indices / weights
if (boneIndices != null && newMesh.polygons[0].vertices[0] == null) {
newMesh.polygons[0].vertices[0].boneWeightsIndices = new IrBoneWeightIndex[0];
}
return newMesh;
}
}