public Mesh(GeometryData data)
{
VertexCount = data.VertexCount;
VertexArrayObject = GL.GenVertexArray();
if (VertexArrayObject == 0)
{
throw new Exception(GL.GetError().ToString());
}
GL.BindVertexArray(VertexArrayObject);
Buffer = GL.GenBuffer();
if (Buffer == 0)
{
throw new Exception(GL.GetError().ToString());
}
GL.BindBuffer(BufferTarget.ArrayBuffer, Buffer);
GL.BufferData(BufferTarget.ArrayBuffer, data.Data.Length, data.Data, BufferUsageHint.StaticDraw);
ElementBuffer = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ElementArrayBuffer, ElementBuffer);
GL.BufferData(BufferTarget.ElementArrayBuffer, data.Indices.Length * 4, data.Indices, BufferUsageHint.StaticDraw);
MeshHelper.ApplyVertexAttribs(data.Attribs, InstanceBuffer);
ElementBufferSize = data.Indices.Length;
GL.BindVertexArray(0);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
}
public static GeometryData FromCollada(float[] vertices, int[] indices, int indicesPerFace, float[] normals, int[] normalIndices, float[] uv, int[] uvIndices, List <Dictionary <string, float> > vertexWeights, List <Bone> bones, float[] bindShapeMatrix = null)
{
var data = new PositionNormalUV0SkinVertex[indices.Length];
var meshIndices = new int[indices.Length];
for (var i = 0; i < indices.Length; i++)
{
var vertex = (bindShapeMatrix != null) ?
new float[] {
vertices[indices[i] * 3],
vertices[indices[i] * 3 + 1],
vertices[indices[i] * 3 + 2]
}.VectorTransform(bindShapeMatrix)
: new float[] {
vertices[indices[i] * 3],
vertices[indices[i] * 3 + 1],
vertices[indices[i] * 3 + 2]
};
data[i].PosX = vertex[0];
data[i].PosY = vertex[1];
data[i].PosZ = vertex[2];
data[i].NormalX = normals[normalIndices[i] * 3];
data[i].NormalY = normals[normalIndices[i] * 3 + 1];
data[i].NormalZ = normals[normalIndices[i] * 3 + 2];
data[i].UvX = uv[uvIndices[i] * 2];
data[i].UvY = 1f - uv[uvIndices[i] * 2 + 1];
// skinning
var weight = 0;
foreach (var b in vertexWeights[indices[i]].OrderByDescending(a => a.Value).Select(a => a.Key))
{
if (vertexWeights[indices[i]][b] > 0)
{
if (weight == 0)
{
data[i].BoneId1 = bones.TakeWhile(a => a.Id != b).Count();
data[i].Weight1 = vertexWeights[indices[i]][b];
}
else if (weight == 1)
{
data[i].BoneId2 = bones.TakeWhile(a => a.Id != b).Count();
data[i].Weight2 = vertexWeights[indices[i]][b];
}
else if (weight == 2)
{
data[i].BoneId3 = bones.TakeWhile(a => a.Id != b).Count();
data[i].Weight3 = vertexWeights[indices[i]][b];
}
else if (weight == 3)
{
data[i].BoneId4 = bones.TakeWhile(a => a.Id != b).Count();
data[i].Weight4 = vertexWeights[indices[i]][b];
}
weight += 1;
}
}
// normalize weights
var totalWeights = data[i].Weight1 + data[i].Weight2 + data[i].Weight3 + data[i].Weight4;
if (totalWeights != 1f)
{
var normalizedWeight = 1.0f / totalWeights;
data[i].Weight1 *= normalizedWeight;
data[i].Weight2 *= normalizedWeight;
data[i].Weight3 *= normalizedWeight;
data[i].Weight4 *= normalizedWeight;
}
meshIndices[i] = i;
}
// check if we need to triangulate the mesh
if (indicesPerFace == 4)
{
meshIndices = MeshHelper.QuadIndicesToTriangles(meshIndices);
}
var result = new GeometryData()
{
VertexCount = data.Length,
Indices = meshIndices
};
using (var stream = new System.IO.MemoryStream())
using (var writer = new System.IO.BinaryWriter(stream))
{
for (int i = 0; i < data.Length; i++)
{
writer.Write(data[i].PosX);
writer.Write(data[i].PosY);
writer.Write(data[i].PosZ);
writer.Write(data[i].NormalX);
writer.Write(data[i].NormalY);
writer.Write(data[i].NormalZ);
writer.Write(data[i].UvX);
writer.Write(data[i].UvY);
writer.Write(data[i].BoneId1);
writer.Write(data[i].BoneId2);
writer.Write(data[i].BoneId3);
writer.Write(data[i].BoneId4);
writer.Write(data[i].Weight1);
writer.Write(data[i].Weight2);
writer.Write(data[i].Weight3);
writer.Write(data[i].Weight4);
}
result.Data = stream.ToArray();
}
// add vertex attribs
result.Attribs = new VertexAttrib[]
{
new VertexAttrib()
{
Size = 3,
Type = (int)OpenTK.Graphics.OpenGL4.VertexAttribPointerType.Float,
Stride = 16 * sizeof(float),
Offset = 0
},
new VertexAttrib()
{
Size = 3,
Type = (int)OpenTK.Graphics.OpenGL4.VertexAttribPointerType.Float,
Stride = 16 * sizeof(float),
Offset = 3 * sizeof(float)
},
new VertexAttrib()
{
Size = 2,
Type = (int)OpenTK.Graphics.OpenGL4.VertexAttribPointerType.Float,
Stride = 16 * sizeof(float),
Offset = 6 * sizeof(float)
},
new VertexAttrib()
{
Size = 4,
Type = (int)OpenTK.Graphics.OpenGL4.VertexAttribIntegerType.Int,
Stride = 16 * sizeof(float),
Offset = 8 * sizeof(float)
},
new VertexAttrib()
{
Size = 4,
Type = (int)OpenTK.Graphics.OpenGL4.VertexAttribPointerType.Float,
Stride = 16 * sizeof(float),
Offset = 12 * sizeof(float)
}
};
return(result);
}
public static Mesh FromFBX(float[] vertices, int[] indices, int indicesPerFace, float[] normals, float[] uv, int[] uvIndices)
{
var mesh = new Mesh();
var data = new MeshHelper.PositionNormalUV0Vertex[indices.Length];
var meshIndices = new int[indices.Length];
// the normals are referred to the indices, not the vertices if
//MappingInformationType
//- ByPolygonVertex
//ReferenceInformationType
//- Direct
// UV
//MappingInformationType
//- ByPolygonVertex
//ReferenceInformationType
//- IndexToDirect
for (var i = 0; i < indices.Length; i++)
{
data[i].PosX = vertices[indices[i] * 3];
data[i].PosY = vertices[indices[i] * 3 + 1];
data[i].PosZ = vertices[indices[i] * 3 + 2];
data[i].NormalX = normals[i * 3];
data[i].NormalY = normals[i * 3 + 1];
data[i].NormalZ = normals[i * 3 + 2];
data[i].UvX = uv[uvIndices[i] * 2];
data[i].UvY = 1f - uv[uvIndices[i] * 2 + 1];
meshIndices[i] = i;
}
// check if we need to triangulate the mesh
if (indicesPerFace == 4)
{
meshIndices = MeshHelper.QuadIndicesToTriangles(meshIndices);
}
mesh.VertexCount = data.Length;
mesh.VertexArrayObject = GL.GenVertexArray();
GL.BindVertexArray(mesh.VertexArrayObject);
mesh.Buffer = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ArrayBuffer, mesh.Buffer);
GL.BufferData(BufferTarget.ArrayBuffer, 32 * data.Length, data, BufferUsageHint.StaticDraw);
mesh.ElementBuffer = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ElementArrayBuffer, mesh.ElementBuffer);
GL.BufferData(BufferTarget.ElementArrayBuffer, meshIndices.Length * 4, meshIndices, BufferUsageHint.StaticDraw);
GL.VertexAttribPointer(0, 3, VertexAttribPointerType.Float, false, 8 * sizeof(float), 0);
GL.EnableVertexAttribArray(0);
GL.VertexAttribPointer(1, 3, VertexAttribPointerType.Float, false, 8 * sizeof(float), 3 * sizeof(float));
GL.EnableVertexAttribArray(1);
GL.VertexAttribPointer(2, 2, VertexAttribPointerType.Float, false, 8 * sizeof(float), 6 * sizeof(float));
GL.EnableVertexAttribArray(2);
mesh.ElementBufferSize = meshIndices.Length;
GL.BindVertexArray(0);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
return(mesh);
}
public static SkinnedMesh FromFBX(float[] vertices, int[] indices, int indicesPerFace, float[] normals, float[] uv, int[] uvIndices, List <CoreFBX.FBX.Deformer> deformers, List <Bone> bones, float[] bindShapeMatrix = null)
{
var mesh = new SkinnedMesh();
var data = new MeshHelper.PositionNormalUV0SkinVertex[indices.Length];
var meshIndices = new int[indices.Length];
// the normals are referred to the indices, not the vertices if
//MappingInformationType
//- ByPolygonVertex
//ReferenceInformationType
//- Direct
// UV
//MappingInformationType
//- ByPolygonVertex
//ReferenceInformationType
//- IndexToDirect
for (var i = 0; i < indices.Length; i++)
{
var vertex = (bindShapeMatrix != null) ?
new float[] {
vertices[indices[i] * 3],
vertices[indices[i] * 3 + 1],
vertices[indices[i] * 3 + 2]
}.VectorTransform(bindShapeMatrix)
: new float[] {
vertices[indices[i] * 3],
vertices[indices[i] * 3 + 1],
vertices[indices[i] * 3 + 2]
};
data[i].PosX = vertex[0];
data[i].PosY = vertex[1];
data[i].PosZ = vertex[2];
data[i].NormalX = normals[i * 3];
data[i].NormalY = normals[i * 3 + 1];
data[i].NormalZ = normals[i * 3 + 2];
data[i].UvX = uv[uvIndices[i] * 2];
data[i].UvY = 1f - uv[uvIndices[i] * 2 + 1];
meshIndices[i] = i;
}
mesh.Bones = bones;
// add skin information
for (int b = 0; b < deformers.Count; b++)
{
var bone = bones.Where(a => a.Id == deformers[b].BoneId).FirstOrDefault();
var boneId = bones.IndexOf(bone);
bone.InverseBindMatrix = deformers[b].TransformLink.MatrixInverse().TransposeMatrix(); //deformers[b].Transform.MatrixProduct(deformers[b].TransformLink.MatrixInverse());// deformers[b].TransformLink.TransposeMatrix().MatrixInverse().MatrixProduct(deformers[b].TransformLink.TransposeMatrix());
for (int indexId = 0; indexId < deformers[b].Indexes.Length; indexId++)
{
// the weight could be needed in more than one vertex
for (var i = 0; i < indices.Length; i++)
{
if (indices[i] == deformers[b].Indexes[indexId])
{
if (data[i].Weight1 == 0)
{
data[i].BoneId1 = boneId;
data[i].Weight1 = deformers[b].Weights[indexId];
}
else if (data[i].Weight2 == 0)
{
data[i].BoneId2 = boneId;
data[i].Weight2 = deformers[b].Weights[indexId];
}
else if (data[i].Weight3 == 0)
{
data[i].BoneId3 = boneId;
data[i].Weight3 = deformers[b].Weights[indexId];
}
else if (data[i].Weight4 == 0)
{
data[i].BoneId4 = boneId;
data[i].Weight4 = deformers[b].Weights[indexId];
}
}
}
}
}
// normalize weights
for (int i = 0; i < data.Length; i++)
{
var totalWeights = data[i].Weight1 + data[i].Weight2 + data[i].Weight3 + data[i].Weight4;
if (totalWeights != 1f)
{
var normalizedWeight = 1.0f / totalWeights;
data[i].Weight1 *= normalizedWeight;
data[i].Weight2 *= normalizedWeight;
data[i].Weight3 *= normalizedWeight;
data[i].Weight4 *= normalizedWeight;
}
}
// check if we need to triangulate the mesh
if (indicesPerFace == 4)
{
meshIndices = MeshHelper.QuadIndicesToTriangles(meshIndices);
}
mesh.VertexCount = data.Length;
mesh.VertexArrayObject = GL.GenVertexArray();
GL.BindVertexArray(mesh.VertexArrayObject);
mesh.Buffer = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ArrayBuffer, mesh.Buffer);
GL.BufferData(BufferTarget.ArrayBuffer, 16 * 4 * data.Length, data, BufferUsageHint.StaticDraw);
mesh.ElementBuffer = GL.GenBuffer();
GL.BindBuffer(BufferTarget.ElementArrayBuffer, mesh.ElementBuffer);
GL.BufferData(BufferTarget.ElementArrayBuffer, meshIndices.Length * 4, meshIndices, BufferUsageHint.StaticDraw);
GL.VertexAttribPointer(0, 3, VertexAttribPointerType.Float, false, 16 * sizeof(float), 0);
GL.EnableVertexAttribArray(0);
GL.VertexAttribPointer(1, 3, VertexAttribPointerType.Float, false, 16 * sizeof(float), 3 * sizeof(float));
GL.EnableVertexAttribArray(1);
GL.VertexAttribPointer(2, 2, VertexAttribPointerType.Float, false, 16 * sizeof(float), 6 * sizeof(float));
GL.EnableVertexAttribArray(2);
GL.VertexAttribIPointer(3, 4, VertexAttribIntegerType.Int, 16 * sizeof(float), IntPtr.Add(IntPtr.Zero, 8 * sizeof(float)));
GL.EnableVertexAttribArray(3);
GL.VertexAttribPointer(4, 4, VertexAttribPointerType.Float, false, 16 * sizeof(float), 12 * sizeof(float));
GL.EnableVertexAttribArray(4);
mesh.ElementBufferSize = meshIndices.Length;
GL.BindVertexArray(0);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
return(mesh);
}
public XYPlaneMesh(float[] bindShapeMatrix = null)
: base(MeshHelper.CreateXYPlane(bindShapeMatrix))
{
}
