protected bool ExtractSkeletonData(Entity entity, out int boneCount, out int weightCount)
{
bool isValidData = false;
boneCount = 0;
weightCount = 0;
//Check if we have pose animation which the HS sub render state does not
//know how to handle
bool hasVertexAnim = entity.Mesh.HasVertexAnimation;
//gather data on the skeleton
if (!hasVertexAnim && entity.HasSkeleton)
{
//get weights count
Mesh mesh = entity.Mesh;
// nb: OGRE source gets ..blendIndexToBoneIndexMap.Count, is this accurate?
boneCount = mesh.BoneAssignmentList.Count;
int totalMeshes = mesh.SubMeshCount;
for (int i = 0; i < totalMeshes; i++)
{
var ro = new RenderOperation();
SubMesh subMesh = mesh.GetSubMesh(i);
subMesh.GetRenderOperation(ro, 0);
//get the largest bone assignment
if (boneCount > subMesh.BoneAssignmentList.Count)
{
}
else
{
boneCount = subMesh.BoneAssignmentList.Count;
}
//go over vertex decleration
//check that they have blend indices and blend weights
VertexElement declWeights =
ro.vertexData.vertexDeclaration.FindElementBySemantic(VertexElementSemantic.BlendWeights, 0);
VertexElement declIndexes =
ro.vertexData.vertexDeclaration.FindElementBySemantic(VertexElementSemantic.BlendIndices, 0);
if ((declWeights != null) && (declIndexes != null))
{
isValidData = true;
switch (declWeights.Type)
{
case VertexElementType.Float1:
weightCount = Axiom.Math.Utility.Clamp(weightCount, weightCount, 1);
break;
case VertexElementType.Float2:
weightCount = Axiom.Math.Utility.Clamp(weightCount, weightCount, 2);
break;
case VertexElementType.Float3:
weightCount = Axiom.Math.Utility.Clamp(weightCount, weightCount, 3);
break;
case VertexElementType.Float4:
weightCount = Axiom.Math.Utility.Clamp(weightCount, weightCount, 4);
break;
default:
isValidData = false;
break;
}
if (isValidData == false)
{
break;
}
}
}
}
return(isValidData);
}
protected XmlElement WriteSubmesh(SubMesh subMesh)
{
XmlElement node = document.CreateElement("submesh");
XmlAttribute attr;
attr = document.CreateAttribute("material");
attr.Value = subMesh.MaterialName;
node.Attributes.Append(attr);
attr = document.CreateAttribute("usesharedvertices");
attr.Value = (subMesh.useSharedVertices) ? "true" : "false";
node.Attributes.Append(attr);
VertexData vertexData =
(subMesh.useSharedVertices) ? mesh.SharedVertexData : subMesh.vertexData;
IndexType indexType = IndexType.Size16;
if (vertexData.vertexCount > short.MaxValue)
{
indexType = IndexType.Size32;
}
attr = document.CreateAttribute("use32bitindexes");
attr.Value = (indexType == IndexType.Size32) ? "true" : "false";
node.Attributes.Append(attr);
bool isTriList = true;
// TODO: Support things other than triangle lists
attr = document.CreateAttribute("operationtype");
RenderOperation op = new RenderOperation();
subMesh.GetRenderOperation(op);
switch (op.operationType)
{
case OperationType.TriangleList:
attr.Value = "triangle_list";
break;
case OperationType.TriangleStrip:
attr.Value = "triangle_strip";
isTriList = false;
break;
case OperationType.TriangleFan:
attr.Value = "triangle_fan";
isTriList = false;
break;
default:
throw new AxiomException("Export of non triangle lists is not supported");
}
node.Attributes.Append(attr);
XmlElement childNode;
childNode = WriteFaces(subMesh, indexType, isTriList);
node.AppendChild(childNode);
if (!subMesh.useSharedVertices)
{
childNode = WriteGeometry(subMesh);
node.AppendChild(childNode);
}
if (subMesh.BoneAssignmentList.Count > 0)
{
childNode = WriteBoneAssignments(subMesh);
node.AppendChild(childNode);
}
return(node);
}