private void SetChunks(HeightMapComponent heightmap)
{
ushort iCapacity = ushort.MaxValue;
ushort vCapacity = (ushort)(iCapacity / 6);
ushort height = (ushort)(vCapacity / heightmap.Width);
ushort width = (ushort)(heightmap.Width);
vCapacity = (ushort)(height * width);
if (heightmap.Chunks == null)
{
heightmap.Chunks = new List <HeightMapChunk>();
}
int nChunks = (int)(heightmap.Height / height);
for (int i = 0; i < nChunks; ++i)
{
HeightMapChunk hmc = new HeightMapChunk();
var vertices = new List <VertexPositionNormalTexture>();
for (int y = i * (height - 1); y < i * (height - 1) + height; ++y)
{
for (int x = 0; x < width; ++x)
{
vertices.Add(heightmap.Vertices[y * heightmap.Width + x]);
}
}
hmc.Vertices = vertices.ToArray();
var indices = new ushort[6 * (width - 1) * (height - 1)];
ushort n = 0;
for (int y = 0; y < height - 1; y++)
{
for (int x = 0; x < width - 1; x++)
{
int botLeft = y * width + x;
int botRight = botLeft + 1;
int topLeft = botLeft + width;
int topRight = topLeft + 1;
indices[n++] = (ushort)topLeft;
indices[n++] = (ushort)botRight;
indices[n++] = (ushort)botLeft;
indices[n++] = (ushort)topLeft;
indices[n++] = (ushort)topRight;
indices[n++] = (ushort)botRight;
}
}
hmc.Indices = indices;
heightmap.Chunks.Add(hmc);
}
}
public void StoreInGraphicsCard(HeightMapChunk c)
{
var vertexBuffer = new VertexBuffer(
device,
typeof(VertexPositionNormalTexture),
c.Vertices.Length,
BufferUsage.None);
vertexBuffer.SetData(c.Vertices);
device.SetVertexBuffer(vertexBuffer);
var indexBuffer = new IndexBuffer(
device,
typeof(ushort),
c.Indices.Length,
BufferUsage.None);
indexBuffer.SetData(c.Indices);
device.Indices = indexBuffer;
}