public void BuildVBO()
{
VBO vbo = new VBO()
{
PrimitiveType = PrimitiveType.Triangles,
TextureId = terrain.DARK_GRASS
};
List <Vector3> verticesList = new List <Vector3>();
List <uint> indicesList = new List <uint>();
List <Vector3> normalsList = new List <Vector3>();
List <Vector2> texcoordsList = new List <Vector2>();
for (int x = X; x <= (X + WIDTH); x++)
{
for (int z = Z; z <= (Z + HEIGHT); z++)
{
verticesList.Add(terrain.HeightVectorAt(x, z));
normalsList.Add(terrain.NormalAt(x, z));
texcoordsList.Add(new Vector2((x - X) / (float)WIDTH, (z - Z) / (float)HEIGHT));
}
}
int stride = WIDTH + 1;
for (int x = 0; x < WIDTH; x++)
{
for (int z = 0; z < HEIGHT; z++)
{
indicesList.Add((uint)((x) * stride + (z + 1)));
indicesList.Add((uint)((x + 1) * stride + (z + 1)));
indicesList.Add((uint)((x) * stride + (z)));
indicesList.Add((uint)((x + 1) * stride + (z)));
indicesList.Add((uint)((x) * stride + (z)));
indicesList.Add((uint)((x + 1) * stride + (z + 1)));
}
}
vbo.SetVerticies(verticesList);
vbo.SetIndices(indicesList);
vbo.SetNormals(normalsList);
vbo.SetTexcoords(texcoordsList);
VBO = vbo;
Triangles = indicesList.Count / 3;
}
public void Load()
{
vbo = new VBO();
vbo.TextureId = Util.LoadTexture("Terrain.Assets.SKYBOX.jpg");
List <Vector3> verticesList = new List <Vector3>();
List <uint> indicesList = new List <uint>();
List <Vector2> texcoordsList = new List <Vector2>();
//forward
verticesList.Add(new Vector3(-1, -1, 1));
verticesList.Add(new Vector3(-1, 1, 1));
verticesList.Add(new Vector3(1, 1, 1));
verticesList.Add(new Vector3(1, -1, 1));
texcoordsList.Add(new Vector2(0.25f, 2f / 3f));
texcoordsList.Add(new Vector2(0.25f, 1f / 3f));
texcoordsList.Add(new Vector2(0.5f, 1f / 3f));
texcoordsList.Add(new Vector2(0.5f, 2f / 3f));
indicesList.Add(0);
indicesList.Add(1);
indicesList.Add(2);
indicesList.Add(2);
indicesList.Add(3);
indicesList.Add(0);
//top
verticesList.Add(new Vector3(-1, 0.98f, 1));
verticesList.Add(new Vector3(-1, 0.98f, -1));
verticesList.Add(new Vector3(1, 0.98f, -1));
verticesList.Add(new Vector3(1, 0.98f, 1));
texcoordsList.Add(new Vector2(0.255f, 1f / 3f));
texcoordsList.Add(new Vector2(0.255f, 0f / 3f));
texcoordsList.Add(new Vector2(0.495f, 0f / 3f));
texcoordsList.Add(new Vector2(0.495f, 1f / 3f));
indicesList.Add(4);
indicesList.Add(5);
indicesList.Add(6);
indicesList.Add(6);
indicesList.Add(7);
indicesList.Add(4);
//left
verticesList.Add(new Vector3(-1, -1, -1));
verticesList.Add(new Vector3(-1, 1, -1));
verticesList.Add(new Vector3(-1, 1, 1));
verticesList.Add(new Vector3(-1, -1, 1));
texcoordsList.Add(new Vector2(0.00f, 2f / 3f));
texcoordsList.Add(new Vector2(0.00f, 1f / 3f));
texcoordsList.Add(new Vector2(0.25f, 1f / 3f));
texcoordsList.Add(new Vector2(0.25f, 2f / 3f));
indicesList.Add(8);
indicesList.Add(9);
indicesList.Add(10);
indicesList.Add(10);
indicesList.Add(11);
indicesList.Add(8);
//right
verticesList.Add(new Vector3(1, -1, 1));
verticesList.Add(new Vector3(1, 1, 1));
verticesList.Add(new Vector3(1, 1, -1));
verticesList.Add(new Vector3(1, -1, -1));
texcoordsList.Add(new Vector2(0.50f, 2f / 3f));
texcoordsList.Add(new Vector2(0.50f, 1f / 3f));
texcoordsList.Add(new Vector2(0.75f, 1f / 3f));
texcoordsList.Add(new Vector2(0.75f, 2f / 3f));
indicesList.Add(12);
indicesList.Add(13);
indicesList.Add(14);
indicesList.Add(14);
indicesList.Add(15);
indicesList.Add(12);
//back
verticesList.Add(new Vector3(1, -1, -1));
verticesList.Add(new Vector3(1, 1, -1));
verticesList.Add(new Vector3(-1, 1, -1));
verticesList.Add(new Vector3(-1, -1, -1));
texcoordsList.Add(new Vector2(0.75f, 2f / 3f));
texcoordsList.Add(new Vector2(0.75f, 1f / 3f));
texcoordsList.Add(new Vector2(1f, 1f / 3f));
texcoordsList.Add(new Vector2(1f, 2f / 3f));
indicesList.Add(16);
indicesList.Add(17);
indicesList.Add(18);
indicesList.Add(18);
indicesList.Add(19);
indicesList.Add(16);
vbo.SetIndices(indicesList);
vbo.SetVerticies(verticesList);
vbo.SetTexcoords(texcoordsList);
}