private static Mesh getMeshFromGrid(final ResultGrid resultGrid, float worldScale) {
Vector3f translate =
new Vector3f(resultGrid.minLocation.x, resultGrid.minLocation.y, resultGrid.minLocation.z);
float scale = 1.0f / worldScale;
Mesh mesh = MarchingCubesMesher.createMesh(resultGrid.dataGrid, scale, translate);
// Setup bone weight buffer
FloatBuffer weights = BufferUtils.createFloatBuffer(mesh.getVertexCount() * 4);
VertexBuffer weightsBuf = new VertexBuffer(VertexBuffer.Type.HWBoneWeight);
weightsBuf.setupData(VertexBuffer.Usage.Static, 4, VertexBuffer.Format.Float, weights);
mesh.setBuffer(weightsBuf);
// Setup bone index buffer
ByteBuffer indices = BufferUtils.createByteBuffer(mesh.getVertexCount() * 4);
VertexBuffer indicesBuf = new VertexBuffer(VertexBuffer.Type.HWBoneIndex);
indicesBuf.setupData(VertexBuffer.Usage.Static, 4, VertexBuffer.Format.UnsignedByte, indices);
mesh.setBuffer(indicesBuf);
Vector3f v1 = new Vector3f();
Vector3f v2 = new Vector3f();
Vector3f v3 = new Vector3f();
for (int i = 0; i < mesh.getTriangleCount(); i++) {
mesh.getTriangle(i, v1, v2, v3);
putBoneData(weights, indices, v1, resultGrid, scale, translate);
putBoneData(weights, indices, v2, resultGrid, scale, translate);
putBoneData(weights, indices, v3, resultGrid, scale, translate);
}
return mesh;
}
public static void convertToFixed(Geometry geom, Format posFmt, Format nmFmt, Format tcFmt) {
geom.updateModelBound();
BoundingBox bbox = (BoundingBox) geom.getModelBound();
Mesh mesh = geom.getMesh();
VertexBuffer positions = mesh.getBuffer(Type.Position);
VertexBuffer normals = mesh.getBuffer(Type.Normal);
VertexBuffer texcoords = mesh.getBuffer(Type.TexCoord);
VertexBuffer indices = mesh.getBuffer(Type.Index);
// positions
FloatBuffer fb = (FloatBuffer) positions.getData();
if (posFmt != Format.Float) {
Buffer newBuf =
VertexBuffer.createBuffer(posFmt, positions.getNumComponents(), mesh.getVertexCount());
Transform t = convertPositions(fb, bbox, newBuf);
t.combineWithParent(geom.getLocalTransform());
geom.setLocalTransform(t);
VertexBuffer newPosVb = new VertexBuffer(Type.Position);
newPosVb.setupData(positions.getUsage(), positions.getNumComponents(), posFmt, newBuf);
mesh.clearBuffer(Type.Position);
mesh.setBuffer(newPosVb);
}
// normals, automatically convert to signed byte
fb = (FloatBuffer) normals.getData();
ByteBuffer bb = BufferUtils.createByteBuffer(fb.capacity());
convertNormals(fb, bb);
normals = new VertexBuffer(Type.Normal);
normals.setupData(Usage.Static, 3, Format.Byte, bb);
normals.setNormalized(true);
mesh.clearBuffer(Type.Normal);
mesh.setBuffer(normals);
// texcoords
fb = (FloatBuffer) texcoords.getData();
if (tcFmt != Format.Float) {
Buffer newBuf =
VertexBuffer.createBuffer(tcFmt, texcoords.getNumComponents(), mesh.getVertexCount());
convertTexCoords2D(fb, newBuf);
VertexBuffer newTcVb = new VertexBuffer(Type.TexCoord);
newTcVb.setupData(texcoords.getUsage(), texcoords.getNumComponents(), tcFmt, newBuf);
mesh.clearBuffer(Type.TexCoord);
mesh.setBuffer(newTcVb);
}
}
public static void compressIndexBuffer(Mesh mesh) {
int vertCount = mesh.getVertexCount();
VertexBuffer vb = mesh.getBuffer(Type.Index);
Format targetFmt;
if (vb.getFormat() == Format.UnsignedInt && vertCount <= 0xffff) {
if (vertCount <= 256) targetFmt = Format.UnsignedByte;
else targetFmt = Format.UnsignedShort;
} else if (vb.getFormat() == Format.UnsignedShort && vertCount <= 0xff) {
targetFmt = Format.UnsignedByte;
} else {
return;
}
IndexBuffer src = mesh.getIndexBuffer();
Buffer newBuf = VertexBuffer.createBuffer(targetFmt, vb.getNumComponents(), src.size());
VertexBuffer newVb = new VertexBuffer(Type.Index);
newVb.setupData(vb.getUsage(), vb.getNumComponents(), targetFmt, newBuf);
mesh.clearBuffer(Type.Index);
mesh.setBuffer(newVb);
IndexBuffer dst = mesh.getIndexBuffer();
for (int i = 0; i < src.size(); i++) {
dst.put(i, src.get(i));
}
}
public RenderDeviceJme(NiftyJmeDisplay display) {
this.display = display;
quadColor = new VertexBuffer(Type.Color);
quadColor.setNormalized(true);
ByteBuffer bb = BufferUtils.createByteBuffer(4 * 4);
quadColor.setupData(Usage.Stream, 4, Format.UnsignedByte, bb);
quad.setBuffer(quadColor);
quadModTC.setUsage(Usage.Stream);
// Load the 3 material types separately to avoid
// reloading the shader when the defines change.
// Material with a single color (no texture or vertex color)
colorMaterial = new Material(display.getAssetManager(), "Common/MatDefs/Misc/Unshaded.j3md");
// Material with a texture and a color (no vertex color)
textureColorMaterial =
new Material(display.getAssetManager(), "Common/MatDefs/Misc/Unshaded.j3md");
// Material with vertex color, used for gradients (no texture)
vertexColorMaterial =
new Material(display.getAssetManager(), "Common/MatDefs/Misc/Unshaded.j3md");
vertexColorMaterial.setBoolean("VertexColor", true);
// Shared render state for all materials
renderState.setDepthTest(false);
renderState.setDepthWrite(false);
}
public static VertexBuffer convertToUByte(VertexBuffer vb) {
FloatBuffer fb = (FloatBuffer) vb.getData();
ByteBuffer bb = BufferUtils.createByteBuffer(fb.capacity());
convertToUByte(fb, bb);
VertexBuffer newVb = new VertexBuffer(vb.getBufferType());
newVb.setupData(vb.getUsage(), vb.getNumComponents(), Format.UnsignedByte, bb);
newVb.setNormalized(true);
return newVb;
}
public static VertexBuffer convertToFloat(VertexBuffer vb) {
if (vb.getFormat() == Format.Float) return vb;
IntBuffer ib = (IntBuffer) vb.getData();
FloatBuffer fb = BufferUtils.createFloatBuffer(ib.capacity());
convertToFloat(ib, fb);
VertexBuffer newVb = new VertexBuffer(vb.getBufferType());
newVb.setupData(vb.getUsage(), vb.getNumComponents(), Format.Float, fb);
return newVb;
}
public static void generate(Mesh mesh, boolean approxTangents, boolean splitMirrored) {
int[] index = new int[3];
Vector3f[] v = new Vector3f[3];
Vector2f[] t = new Vector2f[3];
for (int i = 0; i < 3; i++) {
v[i] = new Vector3f();
t[i] = new Vector2f();
}
if (mesh.getBuffer(Type.Normal) == null) {
throw new IllegalArgumentException("The given mesh has no normal data!");
}
List<VertexData> vertices;
switch (mesh.getMode()) {
case Triangles:
vertices = processTriangles(mesh, index, v, t, splitMirrored);
if (splitMirrored) {
splitVertices(mesh, vertices, splitMirrored);
}
break;
case TriangleStrip:
vertices = processTriangleStrip(mesh, index, v, t);
break;
case TriangleFan:
vertices = processTriangleFan(mesh, index, v, t);
break;
default:
throw new UnsupportedOperationException(mesh.getMode() + " is not supported.");
}
processTriangleData(mesh, vertices, approxTangents, splitMirrored);
// if the mesh has a bind pose, we need to generate the bind pose for the tangent buffer
if (mesh.getBuffer(Type.BindPosePosition) != null) {
VertexBuffer tangents = mesh.getBuffer(Type.Tangent);
if (tangents != null) {
VertexBuffer bindTangents = new VertexBuffer(Type.BindPoseTangent);
bindTangents.setupData(
Usage.CpuOnly, 4, Format.Float, BufferUtils.clone(tangents.getData()));
if (mesh.getBuffer(Type.BindPoseTangent) != null) {
mesh.clearBuffer(Type.BindPoseTangent);
}
mesh.setBuffer(bindTangents);
tangents.setUsage(Usage.Stream);
}
}
}
/**
* 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;
int maxWeights = -1;
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 (VertexBuffer vb : geom.getMesh().getBufferList().getArray()) {
int currentCompsForBuf = compsForBuf[vb.getBufferType().ordinal()];
if (vb.getBufferType() != Type.Index
&& currentCompsForBuf != 0
&& currentCompsForBuf != vb.getNumComponents()) {
throw new UnsupportedOperationException(
"The geometry "
+ geom
+ " buffer "
+ vb.getBufferType()
+ " has different number of components than the rest of the meshes "
+ "(this: "
+ vb.getNumComponents()
+ ", expected: "
+ currentCompsForBuf
+ ")");
}
compsForBuf[vb.getBufferType().ordinal()] = vb.getNumComponents();
formatForBuf[vb.getBufferType().ordinal()] = vb.getFormat();
}
maxWeights = Math.max(maxWeights, geom.getMesh().getMaxNumWeights());
if (mode != null && mode != listMode) {
throw new UnsupportedOperationException(
"Cannot combine different" + " primitive types: " + mode + " != " + listMode);
}
mode = listMode;
compsForBuf[Type.Index.ordinal()] = components;
}
outMesh.setMaxNumWeights(maxWeights);
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();
int components = inBuf.getNumComponents();
doTransformTangents(inPos, globalVertIndex, components, outPos, worldMatrix);
} else {
inBuf.copyElements(0, outBuf, globalVertIndex, geomVertCount);
}
}
globalVertIndex += geomVertCount;
globalTriIndex += geomTriCount;
}
}
/**
* This method returns an array of size 2. The first element is a vertex buffer holding bone
* weights for every vertex in the model. The second element is a vertex buffer holding bone
* indices for vertices (the indices of bones the vertices are assigned to).
*
* @param meshStructure the mesh structure object
* @param vertexListSize a number of vertices in the model
* @param bonesGroups this is an output parameter, it should be a one-sized array; the maximum
* amount of weights per vertex (up to MAXIMUM_WEIGHTS_PER_VERTEX) is stored there
* @param vertexReferenceMap this reference map allows to map the original vertices read from
* blender to vertices that are really in the model; one vertex may appear several times in
* the result model
* @param groupToBoneIndexMap this object maps the group index (to which a vertices in blender
* belong) to bone index of the model
* @param blenderContext the blender context
* @return arrays of vertices weights and their bone indices and (as an output parameter) the
* maximum amount of weights for a vertex
* @throws BlenderFileException this exception is thrown when the blend file structure is somehow
* invalid or corrupted
*/
private VertexBuffer[] getBoneWeightAndIndexBuffer(
Structure meshStructure,
int vertexListSize,
int[] bonesGroups,
Map<Integer, List<Integer>> vertexReferenceMap,
Map<Integer, Integer> groupToBoneIndexMap,
BlenderContext blenderContext)
throws BlenderFileException {
Pointer pDvert = (Pointer) meshStructure.getFieldValue("dvert"); // dvert = DeformVERTices
FloatBuffer weightsFloatData =
BufferUtils.createFloatBuffer(vertexListSize * MAXIMUM_WEIGHTS_PER_VERTEX);
ByteBuffer indicesData =
BufferUtils.createByteBuffer(vertexListSize * MAXIMUM_WEIGHTS_PER_VERTEX);
if (pDvert.isNotNull()) { // assigning weights and bone indices
List<Structure> dverts =
pDvert.fetchData(
blenderContext.getInputStream()); // dverts.size() == verticesAmount (one dvert per
// vertex in blender)
int vertexIndex = 0;
for (Structure dvert : dverts) {
int totweight =
((Number) dvert.getFieldValue("totweight"))
.intValue(); // total amount of weights assignet to the vertex
// (max. 4 in JME)
Pointer pDW = (Pointer) dvert.getFieldValue("dw");
List<Integer> vertexIndices =
vertexReferenceMap.get(
Integer.valueOf(vertexIndex)); // we fetch the referenced vertices here
if (totweight > 0
&& pDW.isNotNull()
&& groupToBoneIndexMap
!= null) { // pDW should never be null here, but I check it just in case :)
int weightIndex = 0;
List<Structure> dw = pDW.fetchData(blenderContext.getInputStream());
for (Structure deformWeight : dw) {
Integer boneIndex =
groupToBoneIndexMap.get(((Number) deformWeight.getFieldValue("def_nr")).intValue());
// Remove this code if 4 weights limitation is removed
if (weightIndex == 4) {
LOGGER.log(
Level.WARNING,
"{0} has more than 4 weight on bone index {1}",
new Object[] {meshStructure.getName(), boneIndex});
break;
}
if (boneIndex
!= null) { // null here means that we came accross group that has no bone attached
// to
float weight = ((Number) deformWeight.getFieldValue("weight")).floatValue();
if (weight == 0.0f) {
weight = 1;
boneIndex = Integer.valueOf(0);
}
// we apply the weight to all referenced vertices
for (Integer index : vertexIndices) {
weightsFloatData.put(index * MAXIMUM_WEIGHTS_PER_VERTEX + weightIndex, weight);
indicesData.put(
index * MAXIMUM_WEIGHTS_PER_VERTEX + weightIndex, boneIndex.byteValue());
}
}
++weightIndex;
}
} else {
for (Integer index : vertexIndices) {
weightsFloatData.put(index * MAXIMUM_WEIGHTS_PER_VERTEX, 1.0f);
indicesData.put(index * MAXIMUM_WEIGHTS_PER_VERTEX, (byte) 0);
}
}
++vertexIndex;
}
} else {
// always bind all vertices to 0-indexed bone
// this bone makes the model look normally if vertices have no bone assigned
// and it is used in object animation, so if we come accross object animation
// we can use the 0-indexed bone for this
for (List<Integer> vertexIndexList : vertexReferenceMap.values()) {
// we apply the weight to all referenced vertices
for (Integer index : vertexIndexList) {
weightsFloatData.put(index * MAXIMUM_WEIGHTS_PER_VERTEX, 1.0f);
indicesData.put(index * MAXIMUM_WEIGHTS_PER_VERTEX, (byte) 0);
}
}
}
bonesGroups[0] = this.endBoneAssigns(vertexListSize, weightsFloatData);
VertexBuffer verticesWeights = new VertexBuffer(Type.BoneWeight);
verticesWeights.setupData(Usage.CpuOnly, bonesGroups[0], Format.Float, weightsFloatData);
VertexBuffer verticesWeightsIndices = new VertexBuffer(Type.BoneIndex);
verticesWeightsIndices.setupData(
Usage.CpuOnly, bonesGroups[0], Format.UnsignedByte, indicesData);
return new VertexBuffer[] {verticesWeights, verticesWeightsIndices};
}