diff options
Diffstat (limited to 'engine/src/tools/jme3tools/optimize/GeometryBatchFactory.java')
| -rw-r--r-- | engine/src/tools/jme3tools/optimize/GeometryBatchFactory.java | 418 |
1 files changed, 418 insertions, 0 deletions
diff --git a/engine/src/tools/jme3tools/optimize/GeometryBatchFactory.java b/engine/src/tools/jme3tools/optimize/GeometryBatchFactory.java new file mode 100644 index 0000000..ae6ad8c --- /dev/null +++ b/engine/src/tools/jme3tools/optimize/GeometryBatchFactory.java @@ -0,0 +1,418 @@ +package jme3tools.optimize; + +import com.jme3.material.Material; +import com.jme3.math.Matrix4f; +import com.jme3.math.Transform; +import com.jme3.math.Vector3f; +import com.jme3.scene.Mesh.Mode; +import com.jme3.scene.*; +import com.jme3.scene.VertexBuffer.Format; +import com.jme3.scene.VertexBuffer.Type; +import com.jme3.scene.VertexBuffer.Usage; +import com.jme3.scene.mesh.IndexBuffer; +import com.jme3.util.BufferUtils; +import com.jme3.util.IntMap.Entry; +import java.nio.Buffer; +import java.nio.FloatBuffer; +import java.nio.ShortBuffer; +import java.util.*; +import java.util.logging.Logger; + +public class GeometryBatchFactory { + + private static final Logger logger = Logger.getLogger(GeometryBatchFactory.class.getName()); + + private static void doTransformVerts(FloatBuffer inBuf, int offset, FloatBuffer outBuf, Matrix4f transform) { + Vector3f pos = new Vector3f(); + + // offset is given in element units + // convert to be in component units + offset *= 3; + + for (int i = 0; i < inBuf.capacity() / 3; i++) { + pos.x = inBuf.get(i * 3 + 0); + pos.y = inBuf.get(i * 3 + 1); + pos.z = inBuf.get(i * 3 + 2); + + transform.mult(pos, pos); + + outBuf.put(offset + i * 3 + 0, pos.x); + outBuf.put(offset + i * 3 + 1, pos.y); + outBuf.put(offset + i * 3 + 2, pos.z); + } + } + + private static void doTransformNorms(FloatBuffer inBuf, int offset, FloatBuffer outBuf, Matrix4f transform) { + Vector3f norm = new Vector3f(); + + // offset is given in element units + // convert to be in component units + offset *= 3; + + for (int i = 0; i < inBuf.capacity() / 3; i++) { + norm.x = inBuf.get(i * 3 + 0); + norm.y = inBuf.get(i * 3 + 1); + norm.z = inBuf.get(i * 3 + 2); + + transform.multNormal(norm, norm); + + outBuf.put(offset + i * 3 + 0, norm.x); + outBuf.put(offset + i * 3 + 1, norm.y); + outBuf.put(offset + i * 3 + 2, norm.z); + } + } + + private static void doTransformTangents(FloatBuffer inBuf, int offset, FloatBuffer outBuf, Matrix4f transform) { + Vector3f tan = new Vector3f(); + float handedness = 0; + // offset is given in element units + // convert to be in component units + offset *= 4; + + for (int i = 0; i < inBuf.capacity() / 4; i++) { + tan.x = inBuf.get(i * 4 + 0); + tan.y = inBuf.get(i * 4 + 1); + tan.z = inBuf.get(i * 4 + 2); + handedness = inBuf.get(i * 4 + 3); + + transform.multNormal(tan, tan); + + outBuf.put(offset + i * 4 + 0, tan.x); + outBuf.put(offset + i * 4 + 1, tan.y); + outBuf.put(offset + i * 4 + 2, tan.z); + outBuf.put(offset + i * 4 + 3, handedness); + + } + } + + /** + * Merges all geometries in the collection into + * the output mesh. Creates a new material using the TextureAtlas. + * + * @param geometries + * @param outMesh + */ + public static void mergeGeometries(Collection<Geometry> geometries, Mesh outMesh) { + int[] compsForBuf = new int[VertexBuffer.Type.values().length]; + Format[] formatForBuf = new Format[compsForBuf.length]; + + int totalVerts = 0; + int totalTris = 0; + int totalLodLevels = 0; + + Mode mode = null; + for (Geometry geom : geometries) { + totalVerts += geom.getVertexCount(); + totalTris += geom.getTriangleCount(); + totalLodLevels = Math.min(totalLodLevels, geom.getMesh().getNumLodLevels()); + + Mode listMode; + int components; + switch (geom.getMesh().getMode()) { + case Points: + listMode = Mode.Points; + components = 1; + break; + case LineLoop: + case LineStrip: + case Lines: + listMode = Mode.Lines; + components = 2; + break; + case TriangleFan: + case TriangleStrip: + case Triangles: + listMode = Mode.Triangles; + components = 3; + break; + default: + throw new UnsupportedOperationException(); + } + + for (Entry<VertexBuffer> entry : geom.getMesh().getBuffers()) { + compsForBuf[entry.getKey()] = entry.getValue().getNumComponents(); + formatForBuf[entry.getKey()] = entry.getValue().getFormat(); + } + + if (mode != null && mode != listMode) { + throw new UnsupportedOperationException("Cannot combine different" + + " primitive types: " + mode + " != " + listMode); + } + mode = listMode; + compsForBuf[Type.Index.ordinal()] = components; + } + + outMesh.setMode(mode); + if (totalVerts >= 65536) { + // make sure we create an UnsignedInt buffer so + // we can fit all of the meshes + formatForBuf[Type.Index.ordinal()] = Format.UnsignedInt; + } else { + formatForBuf[Type.Index.ordinal()] = Format.UnsignedShort; + } + + // generate output buffers based on retrieved info + for (int i = 0; i < compsForBuf.length; i++) { + if (compsForBuf[i] == 0) { + continue; + } + + Buffer data; + if (i == Type.Index.ordinal()) { + data = VertexBuffer.createBuffer(formatForBuf[i], compsForBuf[i], totalTris); + } else { + data = VertexBuffer.createBuffer(formatForBuf[i], compsForBuf[i], totalVerts); + } + + VertexBuffer vb = new VertexBuffer(Type.values()[i]); + vb.setupData(Usage.Static, compsForBuf[i], formatForBuf[i], data); + outMesh.setBuffer(vb); + } + + int globalVertIndex = 0; + int globalTriIndex = 0; + + for (Geometry geom : geometries) { + Mesh inMesh = geom.getMesh(); + geom.computeWorldMatrix(); + Matrix4f worldMatrix = geom.getWorldMatrix(); + + int geomVertCount = inMesh.getVertexCount(); + int geomTriCount = inMesh.getTriangleCount(); + + for (int bufType = 0; bufType < compsForBuf.length; bufType++) { + VertexBuffer inBuf = inMesh.getBuffer(Type.values()[bufType]); + VertexBuffer outBuf = outMesh.getBuffer(Type.values()[bufType]); + + if (inBuf == null || outBuf == null) { + continue; + } + + if (Type.Index.ordinal() == bufType) { + int components = compsForBuf[bufType]; + + IndexBuffer inIdx = inMesh.getIndicesAsList(); + IndexBuffer outIdx = outMesh.getIndexBuffer(); + + for (int tri = 0; tri < geomTriCount; tri++) { + for (int comp = 0; comp < components; comp++) { + int idx = inIdx.get(tri * components + comp) + globalVertIndex; + outIdx.put((globalTriIndex + tri) * components + comp, idx); + } + } + } else if (Type.Position.ordinal() == bufType) { + FloatBuffer inPos = (FloatBuffer) inBuf.getDataReadOnly(); + FloatBuffer outPos = (FloatBuffer) outBuf.getData(); + doTransformVerts(inPos, globalVertIndex, outPos, worldMatrix); + } else if (Type.Normal.ordinal() == bufType) { + FloatBuffer inPos = (FloatBuffer) inBuf.getDataReadOnly(); + FloatBuffer outPos = (FloatBuffer) outBuf.getData(); + doTransformNorms(inPos, globalVertIndex, outPos, worldMatrix); + }else if(Type.Tangent.ordinal() == bufType){ + FloatBuffer inPos = (FloatBuffer) inBuf.getDataReadOnly(); + FloatBuffer outPos = (FloatBuffer) outBuf.getData(); + doTransformTangents(inPos, globalVertIndex, outPos, worldMatrix); + } else { + inBuf.copyElements(0, outBuf, globalVertIndex, geomVertCount); + } + } + + globalVertIndex += geomVertCount; + globalTriIndex += geomTriCount; + } + } + + public static void makeLods(Collection<Geometry> geometries, Mesh outMesh) { + int lodLevels = 0; + int[] lodSize = null; + int index = 0; + for (Geometry g : geometries) { + if (lodLevels == 0) { + lodLevels = g.getMesh().getNumLodLevels(); + } + if (lodSize == null) { + lodSize = new int[lodLevels]; + } + for (int i = 0; i < lodLevels; i++) { + lodSize[i] += g.getMesh().getLodLevel(i).getData().capacity(); + //if( i == 0) System.out.println(index + " " +lodSize[i]); + } + index++; + } + int[][] lodData = new int[lodLevels][]; + for (int i = 0; i < lodLevels; i++) { + lodData[i] = new int[lodSize[i]]; + } + VertexBuffer[] lods = new VertexBuffer[lodLevels]; + int bufferPos[] = new int[lodLevels]; + //int index = 0; + int numOfVertices = 0; + int curGeom = 0; + for (Geometry g : geometries) { + if (numOfVertices == 0) { + numOfVertices = g.getVertexCount(); + } + for (int i = 0; i < lodLevels; i++) { + ShortBuffer buffer = (ShortBuffer) g.getMesh().getLodLevel(i).getDataReadOnly(); + //System.out.println("buffer: " + buffer.capacity() + " limit: " + lodSize[i] + " " + index); + for (int j = 0; j < buffer.capacity(); j++) { + lodData[i][bufferPos[i] + j] = buffer.get() + numOfVertices * curGeom; + //bufferPos[i]++; + } + bufferPos[i] += buffer.capacity(); + } + curGeom++; + } + for (int i = 0; i < lodLevels; i++) { + lods[i] = new VertexBuffer(Type.Index); + lods[i].setupData(Usage.Dynamic, 1, Format.UnsignedInt, BufferUtils.createIntBuffer(lodData[i])); + } + System.out.println(lods.length); + outMesh.setLodLevels(lods); + } + + public static List<Geometry> makeBatches(Collection<Geometry> geometries) { + return makeBatches(geometries, false); + } + + /** + * Batches a collection of Geometries so that all with the same material get combined. + * @param geometries The Geometries to combine + * @return A List of newly created Geometries, each with a distinct material + */ + public static List<Geometry> makeBatches(Collection<Geometry> geometries, boolean useLods) { + ArrayList<Geometry> retVal = new ArrayList<Geometry>(); + HashMap<Material, List<Geometry>> matToGeom = new HashMap<Material, List<Geometry>>(); + + for (Geometry geom : geometries) { + List<Geometry> outList = matToGeom.get(geom.getMaterial()); + if (outList == null) { + outList = new ArrayList<Geometry>(); + matToGeom.put(geom.getMaterial(), outList); + } + outList.add(geom); + } + + int batchNum = 0; + for (Map.Entry<Material, List<Geometry>> entry : matToGeom.entrySet()) { + Material mat = entry.getKey(); + List<Geometry> geomsForMat = entry.getValue(); + Mesh mesh = new Mesh(); + mergeGeometries(geomsForMat, mesh); + // lods + if (useLods) { + makeLods(geomsForMat, mesh); + } + mesh.updateCounts(); + mesh.updateBound(); + + Geometry out = new Geometry("batch[" + (batchNum++) + "]", mesh); + out.setMaterial(mat); + retVal.add(out); + } + + return retVal; + } + + public static void gatherGeoms(Spatial scene, List<Geometry> geoms) { + if (scene instanceof Node) { + Node node = (Node) scene; + for (Spatial child : node.getChildren()) { + gatherGeoms(child, geoms); + } + } else if (scene instanceof Geometry) { + geoms.add((Geometry) scene); + } + } + + /** + * Optimizes a scene by combining Geometry with the same material. + * All Geometries found in the scene are detached from their parent and + * a new Node containing the optimized Geometries is attached. + * @param scene The scene to optimize + * @return The newly created optimized geometries attached to a node + */ + public static Spatial optimize(Node scene) { + return optimize(scene, false); + } + + /** + * Optimizes a scene by combining Geometry with the same material. + * All Geometries found in the scene are detached from their parent and + * a new Node containing the optimized Geometries is attached. + * @param scene The scene to optimize + * @param useLods true if you want the resulting geometry to keep lod information + * @return The newly created optimized geometries attached to a node + */ + public static Node optimize(Node scene, boolean useLods) { + ArrayList<Geometry> geoms = new ArrayList<Geometry>(); + + gatherGeoms(scene, geoms); + + List<Geometry> batchedGeoms = makeBatches(geoms, useLods); + for (Geometry geom : batchedGeoms) { + scene.attachChild(geom); + } + + for (Iterator<Geometry> it = geoms.iterator(); it.hasNext();) { + Geometry geometry = it.next(); + geometry.removeFromParent(); + } + + // Since the scene is returned unaltered the transform must be reset + scene.setLocalTransform(Transform.IDENTITY); + + return scene; + } + + public static void printMesh(Mesh mesh) { + for (int bufType = 0; bufType < Type.values().length; bufType++) { + VertexBuffer outBuf = mesh.getBuffer(Type.values()[bufType]); + if (outBuf == null) { + continue; + } + + System.out.println(outBuf.getBufferType() + ": "); + for (int vert = 0; vert < outBuf.getNumElements(); vert++) { + String str = "["; + for (int comp = 0; comp < outBuf.getNumComponents(); comp++) { + Object val = outBuf.getElementComponent(vert, comp); + outBuf.setElementComponent(vert, comp, val); + val = outBuf.getElementComponent(vert, comp); + str += val; + if (comp != outBuf.getNumComponents() - 1) { + str += ", "; + } + } + str += "]"; + System.out.println(str); + } + System.out.println("------"); + } + } + + public static void main(String[] args) { + Mesh mesh = new Mesh(); + mesh.setBuffer(Type.Position, 3, new float[]{ + 0, 0, 0, + 1, 0, 0, + 1, 1, 0, + 0, 1, 0 + }); + mesh.setBuffer(Type.Index, 2, new short[]{ + 0, 1, + 1, 2, + 2, 3, + 3, 0 + }); + + Geometry g1 = new Geometry("g1", mesh); + + ArrayList<Geometry> geoms = new ArrayList<Geometry>(); + geoms.add(g1); + + Mesh outMesh = new Mesh(); + mergeGeometries(geoms, outMesh); + printMesh(outMesh); + } +} |