private void InitializeBlocks()
{
BlockCount = (Size - 1) / (BlockSize - 1);
blocks = new Block[BlockCount, BlockCount];
for (int i = 0; i < BlockCount; i++)
for (int j = 0; j < BlockCount; j++)
blocks[i, j] = new Block(this, new Point(i, j), new Point(i * (BlockSize - 1), j * (BlockSize - 1)));
foreach (Block block in blocks)
block.Initialize();
}
private float[] GetNeighborBlendings(Block block)
{
int x = block.Position.X;
int y = block.Position.Y;
return new float[] {
(y < BlockCount - 1) ? blocks[x, y + 1].Blending : block.Blending,
(x < BlockCount - 1) ? blocks[x + 1, y].Blending : block.Blending,
(y > 0) ? blocks[x, y - 1].Blending : block.Blending,
(x > 0) ? blocks[x - 1, y].Blending : block.Blending
};
}
private int[] GetNeighborLevels(Block block)
{
int x = block.Position.X;
int y = block.Position.Y;
return new int[] {
(y < BlockCount - 1) ? blocks[x, y + 1].CurrentLevel : block.CurrentLevel,
(x < BlockCount - 1) ? blocks[x + 1, y].CurrentLevel : block.CurrentLevel,
(y > 0) ? blocks[x, y - 1].CurrentLevel : block.CurrentLevel,
(x > 0) ? blocks[x - 1, y].CurrentLevel : block.CurrentLevel
};
}
private void DrawBlock(Block block)
{
int[] neighborLevels = GetNeighborLevels(block);
int[] blockIndices = indices.GetIndices(block.CurrentLevel, neighborLevels).ToArray();
if (blockIndices.Length == 0)
return;
Effect.Parameters["Level"].SetValue(block.CurrentLevel);
Effect.Parameters["Blending"].SetValue(block.Blending);
Effect.Parameters["NeighborLevels"].SetValue(neighborLevels);
Effect.Parameters["NeighborBlendings"].SetValue(GetNeighborBlendings(block));
Effect.Parameters["Offset"].SetValue(new Vector2(block.Offset.X, block.Offset.Y));
Effect.CurrentTechnique.Passes[0].Apply();
IndexBuffer.SetData<int>(blockIndices, 0, blockIndices.Length, SetDataOptions.Discard);
int size = (int)(BlockSize / Math.Pow(2, block.CurrentLevel) + 1);
int primitiveCount = blockIndices.Length / 3;
GraphicsDevice.DrawIndexedPrimitives(
PrimitiveType.TriangleList, GetIndex(block.Offset), 0, size * size, 0, primitiveCount);
TriangleCounter += primitiveCount;
DrawCallCounter++;
}
