private void CopyToTerrainBuffers(VertexMultitextured[] vertices, int[] indices)
{
VertexDeclaration vertexDeclaration = new VertexDeclaration(VertexMultitextured.VertexElements);
_geometryAndSettings.landVertexBuffer = new VertexBuffer(_geometryAndSettings.device, vertexDeclaration, vertices.Length, BufferUsage.WriteOnly);
_geometryAndSettings.landVertexBuffer.SetData(vertices.ToArray());
_geometryAndSettings.sharedIndexBuffer = new IndexBuffer(_geometryAndSettings.device, typeof(int), indices.Length, BufferUsage.WriteOnly);
_geometryAndSettings.sharedIndexBuffer.SetData(indices);
}
private VertexMultitextured[] CalculateNormals(VertexMultitextured[] vertices, int[] indices)
{
for (int i = 0; i < vertices.Length; i++)
vertices[i].Normal = new Vector3(0, 0, 0);
for (int i = 0; i < indices.Length / 3; i++)
{
int index1 = indices[i * 3];
int index2 = indices[i * 3 + 1];
int index3 = indices[i * 3 + 2];
Vector3 side1 = vertices[index1].Position - vertices[index3].Position;
Vector3 side2 = vertices[index1].Position - vertices[index2].Position;
Vector3 normal = Vector3.Cross(side1, side2);
vertices[index1].Normal += normal;
vertices[index2].Normal += normal;
vertices[index3].Normal += normal;
}
for (int i = 0; i < vertices.Length; i++)
vertices[i].Normal.Normalize();
return vertices;
}
