/// <summary>
/// Extract geometry (position, normal, UVs...) for a specific vertex
/// </summary>
/// <param name="mFnMesh"></param>
/// <param name="polygonId">The polygon (face) to examine</param>
/// <param name="vertexIndexGlobal">The object-relative (mesh-relative/global) vertex index</param>
/// <param name="vertexIndexLocal">The face-relative (local) vertex id to examine</param>
/// <param name="hasUV"></param>
/// <returns></returns>
private GlobalVertex ExtractVertex(MFnMesh mFnMesh, int polygonId, int vertexIndexGlobal, int vertexIndexLocal, bool hasUV)
{
MPoint point = new MPoint();
mFnMesh.getPoint(vertexIndexGlobal, point);
MVector normal = new MVector();
mFnMesh.getFaceVertexNormal(polygonId, vertexIndexGlobal, normal);
// Switch coordinate system at object level
point.z *= -1;
normal.z *= -1;
var vertex = new GlobalVertex
{
BaseIndex = vertexIndexGlobal,
Position = point.toArray(),
Normal = normal.toArray()
};
// UV
if (hasUV)
{
float u = 0, v = 0;
mFnMesh.getPolygonUV(polygonId, vertexIndexLocal, ref u, ref v);
vertex.UV = new float[] { u, v };
}
return(vertex);
}
/// <summary>
/// Extract ordered indices on a triangle basis
/// Extract position and normal of each vertex per face
/// </summary>
/// <param name="mFnMesh"></param>
/// <param name="vertices"></param>
/// <param name="indices"></param>
/// <param name="subMeshes"></param>
/// <param name="optimizeVertices"></param>
private void ExtractGeometry(MFnMesh mFnMesh, List <GlobalVertex> vertices, List <int> indices, List <BabylonSubMesh> subMeshes, bool optimizeVertices)
{
// TODO - Multimaterials: create a BabylonSubMesh per submaterial
// TODO - optimizeVertices
MIntArray triangleCounts = new MIntArray();
MIntArray trianglesVertices = new MIntArray();
mFnMesh.getTriangles(triangleCounts, trianglesVertices);
// For each polygon of this mesh
for (int polygonId = 0; polygonId < mFnMesh.numPolygons; polygonId++)
{
MIntArray verticesId = new MIntArray();
int nbTriangles = triangleCounts[polygonId];
// For each triangle of this polygon
for (int triangleIndex = 0; triangleIndex < triangleCounts[polygonId]; triangleIndex++)
{
int[] triangleVertices = new int[3];
mFnMesh.getPolygonTriangleVertices(polygonId, triangleIndex, triangleVertices);
// Inverse winding order
var tmp = triangleVertices[1];
triangleVertices[1] = triangleVertices[2];
triangleVertices[2] = tmp;
// For each vertex of this triangle (3 vertices per triangle)
foreach (int vertexId in triangleVertices)
{
MPoint point = new MPoint();
mFnMesh.getPoint(vertexId, point);
MVector normal = new MVector();
mFnMesh.getFaceVertexNormal(polygonId, vertexId, normal);
var vertex = new GlobalVertex
{
BaseIndex = vertexId,
Position = point.toArray(),
Normal = normal.toArray()
};
indices.Add(vertices.Count);
vertices.Add(vertex);
}
}
}
// BabylonSubMesh
var subMesh = new BabylonSubMesh {
indexStart = 0, materialIndex = 0
};
subMeshes.Add(subMesh);
subMesh.indexCount = indices.Count;
subMesh.verticesStart = 0;
subMesh.verticesCount = vertices.Count;
}
/// <summary>
/// Extract geometry (position, normal, UVs...) for a specific vertex
/// </summary>
/// <param name="mFnMesh"></param>
/// <param name="polygonId">The polygon (face) to examine</param>
/// <param name="vertexIndexGlobal">The object-relative (mesh-relative/global) vertex index</param>
/// <param name="vertexIndexLocal">The face-relative (local) vertex id to examine</param>
/// <param name="uvSetNames"></param>
/// <param name="isUVExportSuccess"></param>
/// <returns></returns>
private GlobalVertex ExtractVertex(MFnMesh mFnMesh, int polygonId, int vertexIndexGlobal, int vertexIndexLocal, MStringArray uvSetNames, ref bool[] isUVExportSuccess)
{
MPoint point = new MPoint();
mFnMesh.getPoint(vertexIndexGlobal, point);
MVector normal = new MVector();
mFnMesh.getFaceVertexNormal(polygonId, vertexIndexGlobal, normal);
// Switch coordinate system at object level
point.z *= -1;
normal.z *= -1;
var vertex = new GlobalVertex
{
BaseIndex = vertexIndexGlobal,
Position = point.toArray(),
Normal = normal.toArray(),
};
// TODO - Export colors ?
//// Color
//int colorIndex;
//string colorSetName;
//float[] defaultColor = new float[] { 0.5f, 0.5f, 0.5f, 1 };
//MColor color = new MColor();
//mFnMesh.getCurrentColorSetName(out colorSetName);
//if (mFnMesh.numColors(colorSetName) > 0)
//{
// //Get the color index
// mFnMesh.getColorIndex(polygonId, vertexIndexLocal, out colorIndex);
// //if a color is set
// if (colorIndex != -1)
// {
// mFnMesh.getColor(colorIndex, color);
// vertex.Color = color.toArray();
// }
// //else set the color to the default one of Maya
// else
// {
// vertex.Color = defaultColor;
// }
//}
//else
//{
// vertex.Color = defaultColor;
//}
// UV
int indexUVSet = 0;
if (uvSetNames.Count > indexUVSet && isUVExportSuccess[indexUVSet])
{
try
{
float u = 0, v = 0;
mFnMesh.getPolygonUV(polygonId, vertexIndexLocal, ref u, ref v, uvSetNames[indexUVSet]);
vertex.UV = new float[] { u, v };
}
catch (Exception e)
{
// An exception is raised when a vertex isn't mapped to an UV coordinate
isUVExportSuccess[indexUVSet] = false;
}
}
indexUVSet = 1;
if (uvSetNames.Count > indexUVSet && isUVExportSuccess[indexUVSet])
{
try
{
float u = 0, v = 0;
mFnMesh.getPolygonUV(polygonId, vertexIndexLocal, ref u, ref v, uvSetNames[indexUVSet]);
vertex.UV2 = new float[] { u, v };
}
catch (Exception e)
{
// An exception is raised when a vertex isn't mapped to an UV coordinate
isUVExportSuccess[indexUVSet] = false;
}
}
return(vertex);
}
private BabylonNode ExportMesh(MObject mObject, BabylonScene babylonScene)
{
MFnMesh mFnMesh = new MFnMesh(mObject);
MFnDagNode mFnDagNode = new MFnDagNode(mObject);
var mObjectParent = mFnMesh.parent(0);
MFnDagNode mFnDagNodeParent = new MFnDagNode(mObjectParent);
// --- prints ---
#region prints
RaiseVerbose("BabylonExporter.Mesh | mFnMesh data", 2);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.name=" + mFnMesh.name, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.absoluteName=" + mFnMesh.absoluteName, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.fullPathName=" + mFnMesh.fullPathName, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.partialPathName=" + mFnMesh.partialPathName, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.numVertices=" + mFnMesh.numVertices, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.numEdges=" + mFnMesh.numEdges, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.numPolygons=" + mFnMesh.numPolygons, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.numFaceVertices=" + mFnMesh.numFaceVertices, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.numNormals=" + mFnMesh.numNormals, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.numUVSets=" + mFnMesh.numUVSets, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.numUVsProperty=" + mFnMesh.numUVsProperty, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.activeColor=" + mFnMesh.activeColor.toString(), 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.attributeCount=" + mFnMesh.attributeCount, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.childCount=" + mFnMesh.childCount, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.displayColors=" + mFnMesh.displayColors, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.dormantColor=" + mFnMesh.dormantColor, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.hasUniqueName=" + mFnMesh.hasUniqueName, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.inUnderWorld=" + mFnMesh.inUnderWorld, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.isDefaultNode=" + mFnMesh.isDefaultNode, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.isInstanceable=" + mFnMesh.isInstanceable, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.isInstanced(true)=" + mFnMesh.isInstanced(true), 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.isInstanced(false)=" + mFnMesh.isInstanced(false), 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.isInstanced()=" + mFnMesh.isInstanced(), 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.isIntermediateObject=" + mFnMesh.isIntermediateObject, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.isShared=" + mFnMesh.isShared, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.numColorSets=" + mFnMesh.numColorSets, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.numColorsProperty=" + mFnMesh.numColorsProperty, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.objectColor=" + mFnMesh.objectColor, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.parentCount=" + mFnMesh.parentCount, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.parentNamespace=" + mFnMesh.parentNamespace, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.uuid().asString()=" + mFnMesh.uuid().asString(), 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.dagRoot().apiType=" + mFnMesh.dagRoot().apiType, 3);
RaiseVerbose("BabylonExporter.Mesh | mFnMesh.model.equalEqual(mFnMesh.objectProperty)=" + mFnMesh.model.equalEqual(mFnMesh.objectProperty), 3);
RaiseVerbose("BabylonExporter.Mesh | ToString(mFnMesh.transformationMatrix)=" + mFnMesh.transformationMatrix.toString(), 3);
var transformationMatrix = new MTransformationMatrix(mFnMesh.transformationMatrix);
RaiseVerbose("BabylonExporter.Mesh | transformationMatrix.getTranslation().toString()=" + transformationMatrix.getTranslation().toString(), 3);
var transformationMatrixParent = new MTransformationMatrix(mFnDagNodeParent.transformationMatrix);
RaiseVerbose("BabylonExporter.Mesh | transformationMatrixParent.getTranslation().toString()=" + transformationMatrixParent.getTranslation().toString(), 3);
// Geometry
MIntArray triangleCounts = new MIntArray();
MIntArray trianglesVertices = new MIntArray();
mFnMesh.getTriangles(triangleCounts, trianglesVertices);
RaiseVerbose("BabylonExporter.Mesh | triangleCounts.ToArray()=" + triangleCounts.ToArray().toString(), 3);
RaiseVerbose("BabylonExporter.Mesh | trianglesVertices.ToArray()=" + trianglesVertices.ToArray().toString(), 3);
int[] polygonsVertexCount = new int[mFnMesh.numPolygons];
for (int polygonId = 0; polygonId < mFnMesh.numPolygons; polygonId++)
{
polygonsVertexCount[polygonId] = mFnMesh.polygonVertexCount(polygonId);
}
RaiseVerbose("BabylonExporter.Mesh | polygonsVertexCount=" + polygonsVertexCount.toString(), 3);
//MFloatPointArray points = new MFloatPointArray();
//mFnMesh.getPoints(points);
//RaiseVerbose("BabylonExporter.Mesh | points.ToArray()=" + points.ToArray().Select(mFloatPoint => mFloatPoint.toString()), 3);
//MFloatVectorArray normals = new MFloatVectorArray();
//mFnMesh.getNormals(normals);
//RaiseVerbose("BabylonExporter.Mesh | normals.ToArray()=" + normals.ToArray().Select(mFloatPoint => mFloatPoint.toString()), 3);
for (int polygonId = 0; polygonId < mFnMesh.numPolygons; polygonId++)
{
MIntArray verticesId = new MIntArray();
RaiseVerbose("BabylonExporter.Mesh | polygonId=" + polygonId, 3);
int nbTriangles = triangleCounts[polygonId];
RaiseVerbose("BabylonExporter.Mesh | nbTriangles=" + nbTriangles, 3);
for (int triangleIndex = 0; triangleIndex < triangleCounts[polygonId]; triangleIndex++)
{
RaiseVerbose("BabylonExporter.Mesh | triangleIndex=" + triangleIndex, 3);
int[] triangleVertices = new int[3];
mFnMesh.getPolygonTriangleVertices(polygonId, triangleIndex, triangleVertices);
RaiseVerbose("BabylonExporter.Mesh | triangleVertices=" + triangleVertices.toString(), 3);
foreach (int vertexId in triangleVertices)
{
RaiseVerbose("BabylonExporter.Mesh | vertexId=" + vertexId, 3);
MPoint point = new MPoint();
mFnMesh.getPoint(vertexId, point);
RaiseVerbose("BabylonExporter.Mesh | point=" + point.toString(), 3);
MVector normal = new MVector();
mFnMesh.getFaceVertexNormal(polygonId, vertexId, normal);
RaiseVerbose("BabylonExporter.Mesh | normal=" + normal.toString(), 3);
}
}
}
#endregion
if (IsMeshExportable(mFnMesh) == false)
{
return(null);
}
RaiseMessage(mFnMesh.name, 1);
var babylonMesh = new BabylonMesh {
name = mFnMesh.name, id = mFnMesh.uuid().asString()
};
// Position / rotation / scaling / hierarchy
ExportNode(babylonMesh, mFnDagNode, babylonScene);
// Misc.
// TODO - Retreive from Maya
// TODO - What is the difference between isVisible and visibility?
// TODO - Fix fatal error: Attempting to save in C:/Users/Fabrice/AppData/Local/Temp/Fabrice.20171205.1613.ma
//babylonMesh.isVisible = mDagPath.isVisible;
//babylonMesh.visibility = meshNode.MaxNode.GetVisibility(0, Tools.Forever);
//babylonMesh.receiveShadows = meshNode.MaxNode.RcvShadows == 1;
//babylonMesh.applyFog = meshNode.MaxNode.ApplyAtmospherics == 1;
if (mFnMesh.numPolygons < 1)
{
RaiseError($"Mesh {babylonMesh.name} has no face", 2);
}
if (mFnMesh.numVertices < 3)
{
RaiseError($"Mesh {babylonMesh.name} has not enough vertices", 2);
}
if (mFnMesh.numVertices >= 65536)
{
RaiseWarning($"Mesh {babylonMesh.name} has more than 65536 vertices which means that it will require specific WebGL extension to be rendered. This may impact portability of your scene on low end devices.", 2);
}
// TODO - Material
var vertices = new List <GlobalVertex>();
var indices = new List <int>();
// TODO - UV, color, alpha
//var mappingChannels = unskinnedMesh.ActiveMapChannelNum;
//bool hasUV = false;
//bool hasUV2 = false;
//for (int i = 0; i < mappingChannels.Count; ++i)
//{
// var indexer = i;
// var channelNum = mappingChannels[indexer];
// if (channelNum == 1)
// {
// hasUV = true;
// }
// else if (channelNum == 2)
// {
// hasUV2 = true;
// }
//}
//var hasColor = unskinnedMesh.NumberOfColorVerts > 0;
//var hasAlpha = unskinnedMesh.GetNumberOfMapVerts(-2) > 0;
// TODO - Add custom properties
var optimizeVertices = false; // meshNode.MaxNode.GetBoolProperty("babylonjs_optimizevertices");
// Compute normals
var subMeshes = new List <BabylonSubMesh>();
ExtractGeometry(mFnMesh, vertices, indices, subMeshes, optimizeVertices);
if (vertices.Count >= 65536)
{
RaiseWarning($"Mesh {babylonMesh.name} has {vertices.Count} vertices. This may prevent your scene to work on low end devices where 32 bits indice are not supported", 2);
if (!optimizeVertices)
{
RaiseError("You can try to optimize your object using [Try to optimize vertices] option", 2);
}
}
RaiseMessage($"{vertices.Count} vertices, {indices.Count / 3} faces", 2);
// Buffers
babylonMesh.positions = vertices.SelectMany(v => v.Position).ToArray();
babylonMesh.normals = vertices.SelectMany(v => v.Normal).ToArray();
babylonMesh.subMeshes = subMeshes.ToArray();
// Buffers - Indices
babylonMesh.indices = indices.ToArray();
babylonScene.MeshesList.Add(babylonMesh);
RaiseMessage("BabylonExporter.Mesh | done", 3);
return(babylonMesh);
}
/// <summary>
/// Extract geometry (position, normal, UVs...) for a specific vertex
/// </summary>
/// <param name="mFnMesh"></param>
/// <param name="polygonId">The polygon (face) to examine</param>
/// <param name="vertexIndexGlobal">The object-relative (mesh-relative/global) vertex index</param>
/// <param name="vertexIndexLocal">The face-relative (local) vertex id to examine</param>
/// <param name="uvSetNames"></param>
/// <param name="isUVExportSuccess"></param>
/// <returns></returns>
private GlobalVertex ExtractVertex(MFnMesh mFnMesh, int polygonId, int vertexIndexGlobal, int vertexIndexLocal, MStringArray uvSetNames, ref bool[] isUVExportSuccess, ref bool isTangentExportSuccess)
{
MPoint point = new MPoint();
mFnMesh.getPoint(vertexIndexGlobal, point);
MVector normal = new MVector();
mFnMesh.getFaceVertexNormal(polygonId, vertexIndexGlobal, normal);
// Switch coordinate system at object level
point.z *= -1;
normal.z *= -1;
var vertex = new GlobalVertex
{
BaseIndex = vertexIndexGlobal,
Position = point.toArray(),
Normal = normal.toArray()
};
// Tangent
if (isTangentExportSuccess)
{
try
{
MVector tangent = new MVector();
mFnMesh.getFaceVertexTangent(polygonId, vertexIndexGlobal, tangent);
// Switch coordinate system at object level
tangent.z *= -1;
int tangentId = mFnMesh.getTangentId(polygonId, vertexIndexGlobal);
bool isRightHandedTangent = mFnMesh.isRightHandedTangent(tangentId);
// Invert W to switch to left handed system
vertex.Tangent = new float[] { (float)tangent.x, (float)tangent.y, (float)tangent.z, isRightHandedTangent ? -1 : 1 };
}
catch
{
// Exception raised when mesh don't have tangents
isTangentExportSuccess = false;
}
}
// Color
int colorIndex;
string colorSetName;
float[] defaultColor = new float[] { 1, 1, 1, 0 };
MColor color = new MColor();
mFnMesh.getCurrentColorSetName(out colorSetName);
if (mFnMesh.numColors(colorSetName) > 0)
{
//Get the color index
mFnMesh.getColorIndex(polygonId, vertexIndexLocal, out colorIndex);
//if a color is set
if (colorIndex != -1)
{
mFnMesh.getColor(colorIndex, color);
vertex.Color = color.toArray();
}
//else set the default color
else
{
vertex.Color = defaultColor;
}
}
// UV
int indexUVSet = 0;
if (uvSetNames.Count > indexUVSet && isUVExportSuccess[indexUVSet])
{
try
{
float u = 0, v = 0;
mFnMesh.getPolygonUV(polygonId, vertexIndexLocal, ref u, ref v, uvSetNames[indexUVSet]);
vertex.UV = new float[] { u, v };
}
catch
{
// An exception is raised when a vertex isn't mapped to an UV coordinate
isUVExportSuccess[indexUVSet] = false;
}
}
indexUVSet = 1;
if (uvSetNames.Count > indexUVSet && isUVExportSuccess[indexUVSet])
{
try
{
float u = 0, v = 0;
mFnMesh.getPolygonUV(polygonId, vertexIndexLocal, ref u, ref v, uvSetNames[indexUVSet]);
vertex.UV2 = new float[] { u, v };
}
catch
{
// An exception is raised when a vertex isn't mapped to an UV coordinate
isUVExportSuccess[indexUVSet] = false;
}
}
// skin
if (mFnSkinCluster != null)
{
// Filter null weights
Dictionary <int, double> weightByInfluenceIndex = new Dictionary <int, double>(); // contains the influence indices with weight > 0
// Export Weights and BonesIndices for the vertex
// Get the weight values of all the influences for this vertex
allMayaInfluenceWeights = new MDoubleArray();
MGlobal.executeCommand($"skinPercent -query -value {mFnSkinCluster.name} {mFnTransform.name}.vtx[{vertexIndexGlobal}]",
allMayaInfluenceWeights);
allMayaInfluenceWeights.get(out double[] allInfluenceWeights);
for (int influenceIndex = 0; influenceIndex < allInfluenceWeights.Length; influenceIndex++)
{
double weight = allInfluenceWeights[influenceIndex];
if (weight > 0)
{
try
{
// add indice and weight in the local lists
weightByInfluenceIndex.Add(indexByNodeName[allMayaInfluenceNames[influenceIndex]], weight);
}
catch (Exception e)
{
RaiseError(e.Message, 2);
RaiseError(e.StackTrace, 3);
}
}
}
// normalize weights => Sum weights == 1
Normalize(ref weightByInfluenceIndex);
// decreasing sort
OrderByDescending(ref weightByInfluenceIndex);
int bonesCount = indexByNodeName.Count; // number total of bones/influences for the mesh
float weight0 = 0;
float weight1 = 0;
float weight2 = 0;
float weight3 = 0;
int bone0 = bonesCount;
int bone1 = bonesCount;
int bone2 = bonesCount;
int bone3 = bonesCount;
int nbBones = weightByInfluenceIndex.Count; // number of bones/influences for this vertex
if (nbBones == 0)
{
weight0 = 1.0f;
bone0 = bonesCount;
}
if (nbBones > 0)
{
bone0 = weightByInfluenceIndex.ElementAt(0).Key;
weight0 = (float)weightByInfluenceIndex.ElementAt(0).Value;
if (nbBones > 1)
{
bone1 = weightByInfluenceIndex.ElementAt(1).Key;
weight1 = (float)weightByInfluenceIndex.ElementAt(1).Value;
if (nbBones > 2)
{
bone2 = weightByInfluenceIndex.ElementAt(2).Key;
weight2 = (float)weightByInfluenceIndex.ElementAt(2).Value;
if (nbBones > 3)
{
bone3 = weightByInfluenceIndex.ElementAt(3).Key;
weight3 = (float)weightByInfluenceIndex.ElementAt(3).Value;
}
}
}
}
float[] weights = { weight0, weight1, weight2, weight3 };
vertex.Weights = weights;
vertex.BonesIndices = (bone3 << 24) | (bone2 << 16) | (bone1 << 8) | bone0;
if (nbBones > 4)
{
bone0 = weightByInfluenceIndex.ElementAt(4).Key;
weight0 = (float)weightByInfluenceIndex.ElementAt(4).Value;
weight1 = 0;
weight2 = 0;
weight3 = 0;
if (nbBones > 5)
{
bone1 = weightByInfluenceIndex.ElementAt(5).Key;
weight1 = (float)weightByInfluenceIndex.ElementAt(4).Value;
if (nbBones > 6)
{
bone2 = weightByInfluenceIndex.ElementAt(6).Key;
weight2 = (float)weightByInfluenceIndex.ElementAt(4).Value;
if (nbBones > 7)
{
bone3 = weightByInfluenceIndex.ElementAt(7).Key;
weight3 = (float)weightByInfluenceIndex.ElementAt(7).Value;
}
}
}
float[] weightsExtra = { weight0, weight1, weight2, weight3 };
vertex.WeightsExtra = weightsExtra;
vertex.BonesIndicesExtra = (bone3 << 24) | (bone2 << 16) | (bone1 << 8) | bone0;
}
}
return(vertex);
}
/// <summary>
/// Extract geometry (position, normal, UVs...) for a specific vertex
/// </summary>
/// <param name="mFnMesh"></param>
/// <param name="polygonId">The polygon (face) to examine</param>
/// <param name="vertexIndexGlobal">The object-relative (mesh-relative/global) vertex index</param>
/// <param name="vertexIndexLocal">The face-relative (local) vertex id to examine</param>
/// <param name="uvSetNames"></param>
/// <param name="isUVExportSuccess"></param>
/// <returns></returns>
private GlobalVertex ExtractVertex(MFnMesh mFnMesh, int polygonId, int vertexIndexGlobal, int vertexIndexLocal, MStringArray uvSetNames, ref bool[] isUVExportSuccess)
{
MPoint point = new MPoint();
mFnMesh.getPoint(vertexIndexGlobal, point);
MVector normal = new MVector();
mFnMesh.getFaceVertexNormal(polygonId, vertexIndexGlobal, normal);
MVector tangent = new MVector();
mFnMesh.getFaceVertexTangent(polygonId, vertexIndexGlobal, tangent);
// Switch coordinate system at object level
point.z *= -1;
normal.z *= -1;
tangent.z *= -1;
float[] tangentVec4 = new float[] { (float)tangent.x, (float)tangent.y, (float)tangent.z, -1 };
var vertex = new GlobalVertex
{
BaseIndex = vertexIndexGlobal,
Position = point.toArray(),
Normal = normal.toArray(),
Tangent = tangentVec4,
};
// Color
int colorIndex;
string colorSetName;
float[] defaultColor = new float[] { 1, 1, 1, 0 };
MColor color = new MColor();
mFnMesh.getCurrentColorSetName(out colorSetName);
if (mFnMesh.numColors(colorSetName) > 0)
{
//Get the color index
mFnMesh.getColorIndex(polygonId, vertexIndexLocal, out colorIndex);
//if a color is set
if (colorIndex != -1)
{
mFnMesh.getColor(colorIndex, color);
vertex.Color = color.toArray();
}
//else set the default color
else
{
vertex.Color = defaultColor;
}
}
// UV
int indexUVSet = 0;
if (uvSetNames.Count > indexUVSet && isUVExportSuccess[indexUVSet])
{
try
{
float u = 0, v = 0;
mFnMesh.getPolygonUV(polygonId, vertexIndexLocal, ref u, ref v, uvSetNames[indexUVSet]);
vertex.UV = new float[] { u, v };
}
catch (Exception e)
{
// An exception is raised when a vertex isn't mapped to an UV coordinate
isUVExportSuccess[indexUVSet] = false;
}
}
indexUVSet = 1;
if (uvSetNames.Count > indexUVSet && isUVExportSuccess[indexUVSet])
{
try
{
float u = 0, v = 0;
mFnMesh.getPolygonUV(polygonId, vertexIndexLocal, ref u, ref v, uvSetNames[indexUVSet]);
vertex.UV2 = new float[] { u, v };
}
catch (Exception e)
{
// An exception is raised when a vertex isn't mapped to an UV coordinate
isUVExportSuccess[indexUVSet] = false;
}
}
return(vertex);
}