bool ParseNodeInstanceGeometry(Mat4 nodeTransform, XmlNode instanceGeometry)
{
string url = XmlUtils.GetAttribute(instanceGeometry, "url");
bool nodeTransformIdentity = nodeTransform.Equals(Mat4.Identity, .0001f);
Quat nodeRotation = nodeTransform.ToMat3().ToQuat().GetNormalize();
string geometryId = GetIdFromURL(url);
if (string.IsNullOrEmpty(geometryId))
{
Error("Invalid \"url\" attribute specified for \"instance_geometry\". Url: \"{0}\".", url);
return(false);
}
GeometryItem geometry;
if (!generatedGeometries.TryGetValue(geometryId, out geometry))
{
Error("Geometry with id \"{0}\" is not exists.", geometryId);
return(false);
}
foreach (GeometryItem.SubMesh geometrySubMesh in geometry.SubMeshes)
{
SubMeshVertex[] newVertices = new SubMeshVertex[geometrySubMesh.Vertices.Length];
for (int n = 0; n < newVertices.Length; n++)
{
SubMeshVertex vertex = geometrySubMesh.Vertices[n];
if (!nodeTransformIdentity)
{
vertex.position = nodeTransform * vertex.position;
vertex.normal = (nodeRotation * vertex.normal).GetNormalize();
}
newVertices[n] = vertex;
}
MySceneSubMesh sceneSubMesh = new MySceneSubMesh(newVertices, geometrySubMesh.Indices,
geometrySubMesh.TextureCoordCount, geometrySubMesh.VertexColors, geometrySubMesh.Material);
generatedSubMeshes.Add(sceneSubMesh);
}
return(true);
}
SubMeshVertex[] GenerateSubMeshVertices(Pair <ChannelTypes, SourceItem>[] inputs, int vertexCount,
int[] indices, int startIndex)
{
SubMeshVertex[] itemVertices = new SubMeshVertex[vertexCount];
int currentIndex = startIndex;
for (int nVertex = 0; nVertex < itemVertices.Length; nVertex++)
{
SubMeshVertex vertex = new SubMeshVertex();
foreach (Pair <ChannelTypes, SourceItem> input in inputs)
{
ChannelTypes channelType = input.First;
SourceItem source = input.Second;
int indexValue = indices[currentIndex];
currentIndex++;
switch (channelType)
{
case ChannelTypes.POSITION:
vertex.position = source.GetItemVec3(indexValue);
break;
case ChannelTypes.NORMAL:
vertex.normal = source.GetItemVec3(indexValue);
break;
case ChannelTypes.TEXCOORD0:
vertex.texCoord0 = source.GetItemVec2(indexValue);
break;
case ChannelTypes.TEXCOORD1:
vertex.texCoord1 = source.GetItemVec2(indexValue);
break;
case ChannelTypes.TEXCOORD2:
vertex.texCoord2 = source.GetItemVec2(indexValue);
break;
case ChannelTypes.TEXCOORD3:
vertex.texCoord3 = source.GetItemVec2(indexValue);
break;
case ChannelTypes.COLOR:
{
Vec3 c = source.GetItemVec3(indexValue);;
vertex.color = new ColorValue(c.X, c.Y, c.Z, 1);
}
break;
//maybe need use "TEXTANGENT".
//case ChannelTypes.TANGENT:
// vertex.tangent = source.GetItemVec3( indexValue );
// break;
}
}
itemVertices[nVertex] = vertex;
}
return(itemVertices);
}
