/// <summary>
/// Build up renderable geometry from input height neighborhood and material map.
/// </summary>
/// <param name="neighbors"></param>
/// <param name="colorMap"></param>
/// <returns></returns>
public bool MakeGeometry(VirtualMap.HeightMapNeighbors heightNeighbors, VirtualMap.ColorMapNeighbors colorNeighbors)
{
MakeMinLut(heightNeighbors);
bool notEmpty = MakeRenderables(heightNeighbors, colorNeighbors);
CheckIndices(heightNeighbors[(int)VirtualMap.HeightMapNeighbors.Dir.Center].Size);
return(notEmpty);
}
/// <summary>
/// Build up renderable geometry for each possible material. Discard empties.
/// </summary>
/// <param name="neighbors"></param>
/// <param name="colorMap"></param>
/// <returns></returns>
private bool MakeRenderables(
VirtualMap.HeightMapNeighbors heightNeighbors,
VirtualMap.ColorMapNeighbors colorNeighbors)
{
var heightMap = heightNeighbors[VirtualMap.HeightMapNeighbors.Dir.Center];
VirtualMap.ColorMap colorMap = colorNeighbors[VirtualMap.ColorMapNeighbors.Dir.Center];
Renderable.PrepareToBuild(heightMap.Size, Min, minLut);
//Dispose();
//renderableDict.Clear();
// Reset number of local vertices in each Renderable
// since we're about to remake the list.
ResetAllVertexCounts();
Vector2 cubeSize = new Vector2(
heightMap.Scale.X / (float)heightMap.Size.X,
heightMap.Scale.Y / (float)heightMap.Size.Y);
Vector2 halfSize = cubeSize * 0.5f;
Point vert = new Point(0, 0);
for (vert.X = 0; vert.X < heightMap.Size.X; vert.X += 1)
{
for (vert.Y = 0; vert.Y < heightMap.Size.Y; vert.Y += 1)
{
float h = heightMap.GetHeightUnsafe(vert.X, vert.Y);
if (h != 0)
{
ushort color = colorMap[vert.X, vert.Y];
//Debug.Assert(TerrainMaterial.IsValid(color, false, true));
if (TerrainMaterial.IsValid(color, false, true))
{
Vector3 pos = new Vector3(
(float)vert.X * cubeSize.X + halfSize.X,
(float)vert.Y * cubeSize.Y + halfSize.Y,
h);
Renderable r = GetOrMakeRenderable(colorMap[vert.X, vert.Y]);
r.AddVertices(pos, halfSize, vert, heightNeighbors, colorNeighbors);
}
}
}
}
return(FinishGeometry(cubeSize, halfSize));
}
