private ModelMeshContent ProcessMesh(MeshContent mesh, ModelBoneContent parent, ContentProcessorContext context)
{
var bounds = new BoundingSphere();
var parts = new List <ModelMeshPartContent>();
var vertexBuffer = new VertexBufferContent();
var indexBuffer = new IndexCollection();
var startVertex = 0;
foreach (var geometry in mesh.Geometry)
{
var vertices = geometry.Vertices;
var vertexCount = vertices.VertexCount;
var geomBuffer = geometry.Vertices.CreateVertexBuffer();
vertexBuffer.Write(vertexBuffer.VertexData.Length, 1, geomBuffer.VertexData);
var startIndex = indexBuffer.Count;
indexBuffer.AddRange(geometry.Indices);
var partContent = new ModelMeshPartContent(vertexBuffer, indexBuffer, startVertex, vertexCount, startIndex, geometry.Indices.Count / 3);
partContent.Material = geometry.Material;
parts.Add(partContent);
// Update mesh bounding box
bounds = BoundingSphere.CreateMerged(bounds, BoundingSphere.CreateFromPoints(geometry.Vertices.Positions));
// Geoms are supposed to all have the same decl, so just steal one of these
vertexBuffer.VertexDeclaration = geomBuffer.VertexDeclaration;
startVertex += vertexCount;
}
return(new ModelMeshContent(mesh.Name, mesh, parent, bounds, parts));
}
internal ModelMeshPartContent(VertexBufferContent vertexBuffer, IndexCollection indices, int vertexOffset,
int numVertices, int startIndex, int primitiveCount)
{
_vertexBuffer = vertexBuffer;
_indexBuffer = indices;
_vertexOffset = vertexOffset;
_numVertices = numVertices;
_startIndex = startIndex;
_primitiveCount = primitiveCount;
}
private Vector3 GetVertexPosition(VertexBufferContent buffer, int i)
{
float[] pos = new float[3];
for (int j = 0; j < 3; j++)
{
int offset = i * (int)buffer.VertexDeclaration.VertexStride + j * 4; //4 bytes per float
pos[j] = BitConverter.ToSingle(buffer.VertexData, offset);
}
return(new Vector3(pos[0], pos[1], pos[2]));
}
private void SetVertexNormalCoord(VertexBufferContent buffer, int i, Vector3 normal, int c)
{
int offset = i * (int)buffer.VertexDeclaration.VertexStride + 12;
float f;
if (c == 0)
{
f = normal.X;
}
else if (c == 1)
{
f = normal.Y;
}
else
{
f = normal.Z;
}
byte[] bytes = BitConverter.GetBytes(f);
for (int j = 0; j < 4; j++)
{
buffer.VertexData[i + c * 4 + j] = bytes[j];
}
}
private ModelMeshContent ProcessMesh(MeshContent mesh, ModelBoneContent parent, ContentProcessorContext context)
{
var parts = new List <ModelMeshPartContent>();
var vertexBuffer = new VertexBufferContent();
var indexBuffer = new IndexCollection();
if (GenerateTangentFrames)
{
context.Logger.LogMessage("Generating tangent frames.");
foreach (GeometryContent geom in mesh.Geometry)
{
if (!geom.Vertices.Channels.Contains(VertexChannelNames.Normal(0)))
{
MeshHelper.CalculateNormals(geom, true);
}
if (!geom.Vertices.Channels.Contains(VertexChannelNames.Tangent(0)) ||
!geom.Vertices.Channels.Contains(VertexChannelNames.Binormal(0)))
{
MeshHelper.CalculateTangentFrames(geom, VertexChannelNames.TextureCoordinate(0), VertexChannelNames.Tangent(0),
VertexChannelNames.Binormal(0));
}
}
}
var startVertex = 0;
foreach (var geometry in mesh.Geometry)
{
var vertices = geometry.Vertices;
var vertexCount = vertices.VertexCount;
ModelMeshPartContent partContent;
if (vertexCount == 0)
{
partContent = new ModelMeshPartContent();
}
else
{
var geomBuffer = geometry.Vertices.CreateVertexBuffer();
vertexBuffer.Write(vertexBuffer.VertexData.Length, 1, geomBuffer.VertexData);
var startIndex = indexBuffer.Count;
indexBuffer.AddRange(geometry.Indices);
partContent = new ModelMeshPartContent(vertexBuffer, indexBuffer, startVertex, vertexCount, startIndex, geometry.Indices.Count / 3);
// Geoms are supposed to all have the same decl, so just steal one of these
vertexBuffer.VertexDeclaration = geomBuffer.VertexDeclaration;
startVertex += vertexCount;
}
partContent.Material = geometry.Material;
parts.Add(partContent);
}
var bounds = new BoundingSphere();
if (mesh.Positions.Count > 0)
{
bounds = BoundingSphere.CreateFromPoints(mesh.Positions);
}
return(new ModelMeshContent(mesh.Name, mesh, parent, bounds, parts));
}