public static Mesh LoadMesh(Device device, string path)
{
var loader = new WavefrontObjLoader();
loader.LoadObj(path);
//if (positionTransform.HasValue)
//{
// Matrix3 transform = positionTransform.Value;
// for (int j = 0; j < loader.VertexList.Count; j++)
// {
// loader.VertexList[j].Vector = Matrix3.Transform(loader.VertexList[j].Vector, transform);
// }
//}
// vertex buffer
var vertexCount = loader.TriangleCount * 3;
var vertices = new ColoredTexturedVertex[vertexCount];
int i = 0;
foreach (var face in loader.FaceList)
{
var v = face.VertexIndexList;
var n = face.NormalVertexIndexList;
var t = face.TextureVertexIndexList;
vertices[i + 0] = new ColoredTexturedVertex {
Position = loader.VertexList[v[0] - 1].Vector, Normal = loader.NormalList[n[0] - 1].Vector, Color = new Vector4(1, 1, 1, 1), Texture = loader.TextureList[t[0] - 1].Vector
};
vertices[i + 1] = new ColoredTexturedVertex {
Position = loader.VertexList[v[1] - 1].Vector, Normal = loader.NormalList[n[1] - 1].Vector, Color = new Vector4(1, 1, 1, 1), Texture = loader.TextureList[t[1] - 1].Vector
};
vertices[i + 2] = new ColoredTexturedVertex {
Position = loader.VertexList[v[2] - 1].Vector, Normal = loader.NormalList[n[2] - 1].Vector, Color = new Vector4(1, 1, 1, 1), Texture = loader.TextureList[t[2] - 1].Vector
};
i += 3;
if (v.Length == 4)
{
vertices[i + 0] = new ColoredTexturedVertex {
Position = loader.VertexList[v[2] - 1].Vector, Normal = loader.NormalList[n[2] - 1].Vector, Color = new Vector4(1, 1, 1, 1), Texture = loader.TextureList[t[2] - 1].Vector
};
vertices[i + 1] = new ColoredTexturedVertex {
Position = loader.VertexList[v[3] - 1].Vector, Normal = loader.NormalList[n[3] - 1].Vector, Color = new Vector4(1, 1, 1, 1), Texture = loader.TextureList[t[3] - 1].Vector
};
vertices[i + 2] = new ColoredTexturedVertex {
Position = loader.VertexList[v[0] - 1].Vector, Normal = loader.NormalList[n[0] - 1].Vector, Color = new Vector4(1, 1, 1, 1), Texture = loader.TextureList[t[0] - 1].Vector
};
i += 3;
}
}
var indices = new int[vertexCount];
for (int j = 0; j < vertexCount; j++)
{
indices[j] = j;
}
Mesh mesh = new Mesh(device);
mesh.VertexBuffer = Buffer11.Create <ColoredTexturedVertex>(device.NativeDevice, BindFlags.VertexBuffer, vertices.ToArray());
mesh.IndexBuffer = Buffer11.Create(device.NativeDevice, BindFlags.IndexBuffer, indices.ToArray());
mesh.VertexSize = Utilities.SizeOf <ColoredTexturedVertex>();
mesh.IndexCount = indices.Count();
return(mesh);
}
public static Mesh CreateSphere(Device device)
{
float diameter = 30;
int tessellation = 10;
if (tessellation < 3)
{
throw new ArgumentOutOfRangeException("tessellation", "Must be >= 3");
}
int verticalSegments = tessellation;
int horizontalSegments = tessellation * 2;
var vertices = new ColoredTexturedVertex[(verticalSegments + 1) * (horizontalSegments + 1)];
var indices = new int[(verticalSegments) * (horizontalSegments + 1) * 6];
float radius = diameter / 2;
int vertexCount = 0;
// Create rings of vertices at progressively higher latitudes.
for (int i = 0; i <= verticalSegments; i++)
{
float v = 1.0f - (float)i / verticalSegments;
var latitude = (float)((i * Math.PI / verticalSegments) - Math.PI / 2.0);
var dy = (float)Math.Sin(latitude);
var dxz = (float)Math.Cos(latitude);
// Create a single ring of vertices at this latitude.
for (int j = 0; j <= horizontalSegments; j++)
{
float u = (float)j / horizontalSegments;
var longitude = (float)(j * 2.0 * Math.PI / horizontalSegments);
var dx = (float)Math.Sin(longitude);
var dz = (float)Math.Cos(longitude);
dx *= dxz;
dz *= dxz;
var normal = new Vector3(dx, dy, dz);
var textureCoordinate = new Vector2(u, v);
vertices[vertexCount++] = new ColoredTexturedVertex(normal * radius, normal, Vector4.One, textureCoordinate);
}
}
// Fill the index buffer with triangles joining each pair of latitude rings.
int stride = horizontalSegments + 1;
int indexCount = 0;
for (int i = 0; i < verticalSegments; i++)
{
for (int j = 0; j <= horizontalSegments; j++)
{
int nextI = i + 1;
int nextJ = (j + 1) % stride;
//indices[indexCount++] = (i * stride + j);
//indices[indexCount++] = (nextI * stride + j);
//indices[indexCount++] = (i * stride + nextJ);
//indices[indexCount++] = (i * stride + nextJ);
//indices[indexCount++] = (nextI * stride + j);
//indices[indexCount++] = (nextI * stride + nextJ);
indices[indexCount++] = (i * stride + j);
indices[indexCount++] = (i * stride + nextJ);
indices[indexCount++] = (nextI * stride + j);
indices[indexCount++] = (nextI * stride + j);
indices[indexCount++] = (i * stride + nextJ);
indices[indexCount++] = (nextI * stride + nextJ);
}
}
Mesh mesh = new Mesh(device);
mesh.VertexBuffer = Buffer11.Create <ColoredTexturedVertex>(device.NativeDevice, BindFlags.VertexBuffer, vertices.ToArray());
mesh.IndexBuffer = Buffer11.Create(device.NativeDevice, BindFlags.IndexBuffer, indices.ToArray());
mesh.VertexSize = Utilities.SizeOf <ColoredTexturedVertex>();
mesh.IndexCount = indices.Count();
return(mesh);
}