/// <summary>
/// Method to rebuild the normals and tangents of the loaded model.
/// </summary>
public void rebuildNormals()
{
// Generates a list of adjacent faces used for generating normals.
int[] adjacency = new int[model.NumberFaces * 3];
model.GenerateAdjacency(0, adjacency);
model.ComputeNormals(adjacency);
//model.ComputeTangentFrame(TangentOptions.GenerateInPlace | TangentOptions.CalculateNormals);
TangentBuilder.CalculateTangents(model);
}
/// <summary>
/// Method to load in a directx mesh.
/// </summary>
/// <param name="filename">Path of the model to load.</param>
/// <returns></returns>
public Mesh LoadModel(string filename)
{
Mesh mesh;
VertexElement[] vElements = new VertexElement[]
{
new VertexElement(0, 0, DeclarationType.Float3, DeclarationMethod.Default, DeclarationUsage.Position, 0),
new VertexElement(0, 12, DeclarationType.Float2, DeclarationMethod.Default, DeclarationUsage.TextureCoordinate, 0),
new VertexElement(0, 20, DeclarationType.Float3, DeclarationMethod.Default, DeclarationUsage.Normal, 0),
new VertexElement(0, 32, DeclarationType.Float4, DeclarationMethod.Default, DeclarationUsage.Tangent, 0),
VertexElement.VertexDeclarationEnd
};
// Load the mesh from file.
mesh = Mesh.FromFile(filename, MeshFlags.Managed | MeshFlags.Use32Bit, device);
// Clone the mesh.
mesh = mesh.Clone(MeshFlags.Managed | MeshFlags.Use32Bit, vElements, device);
// Generates a list of adjacent faces used for generating normals.
int[] adjacency = new int[mesh.NumberFaces * 3];
mesh.GenerateAdjacency(0, adjacency);
//mesh.ComputeTangentFrame(TangentOptions.GenerateInPlace | TangentOptions.CalculateNormals);
mesh.ComputeNormals(adjacency);
// Create the variables needed to convert the mesh to right handed coordinates.
GraphicsStream gStream = mesh.LockVertexBuffer(LockFlags.None);
List <Vertex> vertices = new List <Vertex>();
Vertex vertex;
// Convert the mesh to right handed coordinates.
for (int i = 0; i < mesh.NumberVertices; i++)
{
vertex = (Vertex)gStream.Read(typeof(Vertex));
vertex.Position.Z *= -1.0f;
vertex.Normal = Vector3.TransformNormal(vertex.Normal, Matrix.Scaling(1.0f, 1.0f, -1.0f));
vertices.Add(vertex);
}
// Set the vertex buffer
mesh.SetVertexBufferData(vertices.ToArray(), LockFlags.None);
// Calculate the tangents
TangentBuilder.CalculateTangents(mesh);
return(mesh);
}
/// <summary>
/// Copies over the vertex and index buffers and calls the function within
/// the model class to build a Mesh class.
/// </summary>
private void buildMesh()
{
VertexElement[] vElements = new VertexElement[]
{
new VertexElement(0, 0, DeclarationType.Float3, DeclarationMethod.Default, DeclarationUsage.Position, 0),
new VertexElement(0, 12, DeclarationType.Float2, DeclarationMethod.Default, DeclarationUsage.TextureCoordinate, 0),
new VertexElement(0, 20, DeclarationType.Float3, DeclarationMethod.Default, DeclarationUsage.Normal, 0),
new VertexElement(0, 32, DeclarationType.Float4, DeclarationMethod.Default, DeclarationUsage.Tangent, 0),
VertexElement.VertexDeclarationEnd
};
// Creates a new mesh
try
{
mesh = new Mesh(faceList.Count, vertexInfo.Count, MeshFlags.Managed | MeshFlags.Use32Bit, vElements, device);
mesh.SetVertexBufferData(vertexInfo.ToArray(), LockFlags.None);
mesh.SetIndexBufferData(faceList.ToArray(), LockFlags.None);
}
catch (DirectXException)
{
MessageBox.Show("A problem occured with the model", "Error", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
faceList.Clear();
vertexInfo.Clear();
vertexList.Clear();
mesh = new Mesh(1, 1, MeshFlags.Managed, vElements, device);
return;
}
// Try loop to generate normals (if needed), tangents and binormals.
try
{
// Generates a list of adjacent faces used for generating normals.
int[] adjacency = new int[mesh.NumberFaces * 3];
mesh.GenerateAdjacency(0, adjacency);
if (!hasNormals)
{
mesh.ComputeNormals(adjacency);
}
TangentBuilder.CalculateTangents(mesh);
}
catch (DirectXException dxe)
{
Console.WriteLine(dxe);
}
}
public void CreateGroundPlane(float minValue, float size, float uvScale)
{
VertexElement[] vElements = new VertexElement[]
{
new VertexElement(0, 0, DeclarationType.Float3, DeclarationMethod.Default, DeclarationUsage.Position, 0),
new VertexElement(0, 12, DeclarationType.Float2, DeclarationMethod.Default, DeclarationUsage.TextureCoordinate, 0),
new VertexElement(0, 20, DeclarationType.Float3, DeclarationMethod.Default, DeclarationUsage.Normal, 0),
new VertexElement(0, 32, DeclarationType.Float4, DeclarationMethod.Default, DeclarationUsage.Tangent, 0),
VertexElement.VertexDeclarationEnd
};
model = new Mesh(2, 4, MeshFlags.Managed | MeshFlags.Use32Bit, vElements, device);
Vertex[] vertexList = new Vertex[4];
// Initialize the values for the 4 vertexes.
vertexList[0].Position = new Vector3(-size, minValue, -size);
vertexList[0].Normal = new Vector3(0, 1.0f, 0);
vertexList[0].TexCoord = new Vector2(0, 0);
vertexList[1].Position = new Vector3(-size, minValue, size);
vertexList[1].Normal = new Vector3(0, 1.0f, 0);
vertexList[1].TexCoord = new Vector2(0, uvScale);
vertexList[2].Position = new Vector3(size, minValue, -size);
vertexList[2].Normal = new Vector3(0, 1.0f, 0);
vertexList[2].TexCoord = new Vector2(uvScale, 0);
vertexList[3].Position = new Vector3(size, minValue, size);
vertexList[3].Normal = new Vector3(0, 1.0f, 0);
vertexList[3].TexCoord = new Vector2(uvScale, uvScale);
int[] indexList = { 0, 3, 2, 1, 3, 0 };
model.SetIndexBufferData(indexList, LockFlags.None);
model.SetVertexBufferData(vertexList, LockFlags.None);
TangentBuilder.CalculateTangents(model);
}
