public Geometry(IntPtr pRenderModel, out int nTexId)
{
unsafe
{
// Unpack all the RenderModel data
void * ptr = pRenderModel.ToPointer();
IntPtr pVertexData = *(IntPtr *)ptr;
ptr = (void *)((IntPtr *)ptr + 1);
uint unVertexCount = *(uint *)pRenderModel.ToPointer();
ptr = (void *)((uint *)ptr + 1);
IntPtr pIndexData = *(IntPtr *)pRenderModel.ToPointer();
ptr = (void *)((IntPtr *)ptr + 1);
uint unIndexCount = *(uint *)pRenderModel.ToPointer();
ptr = (void *)((uint *)ptr + 1);
nTexId = *(int *)pRenderModel.ToPointer();
mGeometry = new float[3 * unVertexCount];
mNormals = new float[3 * unVertexCount];
mUvs = new float[2 * unVertexCount];
Valve.VR.RenderModel_Vertex_t *vertexPtr = (Valve.VR.RenderModel_Vertex_t *)pVertexData.ToPointer();
Valve.VR.RenderModel_Vertex_t v;
System.UInt16 *idxPtr = (System.UInt16 *)pIndexData.ToPointer();
for (uint i = 0; i < unVertexCount; i++)
{
v = *(vertexPtr + i);
mGeometry[3 * i + 0] = v.vPosition.v0;
mGeometry[3 * i + 1] = v.vPosition.v1;
mGeometry[3 * i + 2] = v.vPosition.v2;
mNormals[3 * i + 0] = v.vNormal.v0;
mNormals[3 * i + 1] = v.vNormal.v1;
mNormals[3 * i + 2] = v.vNormal.v2;
mUvs[3 * i + 0] = v.rfTextureCoord0;
mUvs[3 * i + 1] = v.rfTextureCoord1;
}
for (uint i = 0; i < unIndexCount; i++)
{
mGeometryIndices[i] = (int)*(idxPtr + i);
}
mNumPrimitives = (int)unIndexCount / 3;
primitiveType = OpenTK.Graphics.OpenGL4.BeginMode.Triangles;
}
}
// I'm doing this with too many loops but whatever.
// Also I'm shattering the ability to put multiple meshes in one file.
void LoadObjFile(string filename)
{
ObjParser.Obj obj = new ObjParser.Obj();
obj.LoadObj(filename);
mGeometry = new float[3 * 3 * obj.FaceList.Count];
mGeometryIndices = new int[3 * obj.FaceList.Count];
mNormals = new float[3 * 3 * obj.FaceList.Count];
mUvs = new float[2 * 3 * obj.FaceList.Count];
// This is the smart indexed way, but I need flat shading right now.
//int i = 0;
//foreach (var v in obj.VertexList)
//{
// mGeometry[3 * i + 0] = (float)v.X;
// mGeometry[3 * i + 1] = (float)v.Y;
// mGeometry[3 * i + 2] = (float)v.Z;
// i++;
//}
//i = 0;
//foreach (var f in obj.FaceList)
//{
// mGeometryIndices[3 * i + 0] = f.VertexIndexList[0] - 1;
// mGeometryIndices[3 * i + 1] = f.VertexIndexList[1] - 1;
// mGeometryIndices[3 * i + 2] = f.VertexIndexList[2] - 1;
// i++;
//}
mNumPrimitives = obj.FaceList.Count;
primitiveType = OpenTK.Graphics.OpenGL4.BeginMode.Triangles;
int i = 0;
Vector3[] normalCreators = new Vector3[3];
Vector3 n;
foreach (var f in obj.FaceList)
{
for (int v = 0; v < 3; v++)
{
normalCreators[v] = new Vector3((float)obj.VertexList.ElementAt(f.VertexIndexList[v] - 1).X, (float)obj.VertexList.ElementAt(f.VertexIndexList[v] - 1).Y, (float)obj.VertexList.ElementAt(f.VertexIndexList[v] - 1).Z);
mGeometry[9 * i + 3 * v + 0] = (float)obj.VertexList.ElementAt(f.VertexIndexList[v] - 1).X;
mGeometry[9 * i + 3 * v + 1] = (float)obj.VertexList.ElementAt(f.VertexIndexList[v] - 1).Y;
mGeometry[9 * i + 3 * v + 2] = (float)obj.VertexList.ElementAt(f.VertexIndexList[v] - 1).Z;
}
n = Math.calculateFaceNormal(normalCreators[0], normalCreators[1], normalCreators[2]);
for (int j = 0; j < 3; j++)
{
mNormals[9 * i + 3 * j + 0] = n.X;
mNormals[9 * i + 3 * j + 1] = n.Y;
mNormals[9 * i + 3 * j + 2] = n.Z;
}
if (obj.TextureList.Count > 0)
{
for (int j = 0; j < 3; j++)
{
mUvs[6 * i + 2 * j + 0] = (float)obj.TextureList[f.TextureVertexIndexList.ElementAt(j) - 1].X;
mUvs[6 * i + 2 * j + 1] = (float)obj.TextureList[f.TextureVertexIndexList.ElementAt(j) - 1].Y;
}
}
i++;
}
for (i = 0; i < mGeometryIndices.Length; i++)
{
mGeometryIndices[i] = i;
}
}
