public Terrain CreateTerrain()
{
var terrain = new Terrain()
{
AmbientColor = new Vector3(0.1f, 0.1f, 0.1f),
DiffuseColor = Color.White.ToVector3(),
SpecularColor = Color.White.ToVector3(),
Shininess = 40,
Texture = PrimaryTexture,
SecondaryTexture = SecondaryTexture,
MarkTexture = MarkTexture
};
GenerateVertices(terrain, GeneratePositions());
for(int i = 0; i < SquareCount; ++i)
for (int j = 0; j < SquareCount; ++j)
{
terrain.AddIndex((i + 1) * (SquareCount + 1) + j);
terrain.AddIndex(i * (SquareCount + 1) + j + 1);
terrain.AddIndex(i*(SquareCount + 1) + j);
terrain.AddIndex((i + 1)*(SquareCount + 1) + j);
terrain.AddIndex((i + 1)*(SquareCount + 1) + j + 1);
terrain.AddIndex(i*(SquareCount + 1) + j + 1);
}
terrain.InitializePrimitive(GraphicsDevice);
return terrain;
}
private void GenerateVertices(Terrain terrain, Vector3[,] positions)
{
for(int i = 0; i < SquareCount+1; ++i)
for (int j = 0; j < SquareCount + 1; ++j)
{
var textureCoordinates = new Vector2(i / (float)SquareCount, (float)j / (float)SquareCount);
var normal = (i == 0 || j == 0 || i == SquareCount || j == SquareCount)
? Vector3.Up
: CalculateNormal(i, j, positions);
terrain.AddVertex(positions[i, j], normal, textureCoordinates);
}
}