public Terrain(int gridX, int gridZ, Loader loader, TerrainTexturePack texturePack, TerrainTexture blendMap)
{
TexturePack = texturePack;
BlendMap = blendMap;
X = gridX * SIZE;
Z = gridZ * SIZE;
generator = new HeightsGenerator(gridX, gridZ, vertexCount, seed);
Model = GenerateTerrain(loader);
}
private RawModel GenerateTerrain(Loader loader)
{
HeightsGenerator generator = new HeightsGenerator();
int count = vertexCount * vertexCount;
heights = new float[vertexCount, vertexCount];
float[] vertices = new float[count * 3];
float[] normals = new float[count * 3];
float[] textureCoords = new float[count * 2];
uint[] indices = new uint[6 * (vertexCount - 1) * (vertexCount * 1)];
int vertexPointer = 0;
for (int i = 0; i < vertexCount; i++)
{
for (int j = 0; j < vertexCount; j++)
{
vertices[vertexPointer * 3] = j / ((float)vertexCount - 1) * SIZE;
float height = GetHeight(j, i);
vertices[vertexPointer * 3 + 1] = height;
heights[j, i] = height;
vertices[vertexPointer * 3 + 2] = i / ((float)vertexCount - 1) * SIZE;
Vector3 normal = CalculateNormal(j, i);
normals[vertexPointer * 3] = normal.X;
normals[vertexPointer * 3 + 1] = normal.Y;
normals[vertexPointer * 3 + 2] = normal.Z;
textureCoords[vertexPointer * 2] = j / ((float)vertexCount - 1);
textureCoords[vertexPointer * 2 + 1] = i / ((float)vertexCount - 1);
vertexPointer++;
}
}
int pointer = 0;
for (int gz = 0; gz < vertexCount - 1; gz++)
{
for (int gx = 0; gx < vertexCount - 1; gx++)
{
uint topLeft = (uint)Math.Abs((gz * vertexCount) + gx);
uint topRight = topLeft + 1;
uint bottomLeft = (uint)Math.Abs(((gz + 1) * vertexCount) + gx);
uint bottomRight = bottomLeft + 1;
indices[pointer++] = topLeft;
indices[pointer++] = bottomLeft;
indices[pointer++] = topRight;
indices[pointer++] = topRight;
indices[pointer++] = bottomLeft;
indices[pointer++] = bottomRight;
}
}
return(loader.LoadToVao(vertices, textureCoords, normals, indices));
}