public DeviceBuffer GetIndexBuffer(
int width,
int height,
out ushort[] indices)
{
var size = new TerrainPatchSize
{
Width = width,
Height = height
};
if (!_cachedIndexBuffers.TryGetValue(size, out var result))
{
_cachedIndexBuffers[size] = result = new CacheEntry
{
Buffer = AddDisposable(CreateIndexBuffer(size, out indices)),
Indices = indices
};
}
else
{
indices = result.Indices;
}
return(result.Buffer);
}
private DeviceBuffer CreateIndexBuffer(
TerrainPatchSize size,
out ushort[] indices)
{
// TODO: Could use triangle strip
var numIndices = CalculateNumIndices(size.Width, size.Height);
indices = new ushort[numIndices];
for (int y = 0, indexIndex = 0; y < size.Height - 1; y++)
{
var yThis = y * size.Width;
var yNext = (y + 1) * size.Width;
for (var x = 0; x < size.Width - 1; x++)
{
// Triangle 1
indices[indexIndex++] = (ushort)(yThis + x);
indices[indexIndex++] = (ushort)(yThis + x + 1);
indices[indexIndex++] = (ushort)(yNext + x);
// Triangle 2
indices[indexIndex++] = (ushort)(yNext + x);
indices[indexIndex++] = (ushort)(yThis + x + 1);
indices[indexIndex++] = (ushort)(yNext + x + 1);
}
}
return(_graphicsDevice.CreateStaticBuffer(indices, BufferUsage.IndexBuffer));
}
public TerrainSceneNode AddTerrainSceneNodeFromRawData(float[,] data, int width, SceneNode parent, int id, Vector3D position, Vector3D rotation, Vector3D scale, Color vertexColor, int maxLOD, TerrainPatchSize patchSize, int smoothFactor)
{
IntPtr par = IntPtr.Zero;
if (parent != null)
par = parent.Raw;
return (TerrainSceneNode)
NativeElement.GetObject(SceneManager_AddTerrainSceneNodeFromRawData(_raw, data, data.Length, width, par, id, position.ToUnmanaged(), rotation.ToUnmanaged(), scale.ToUnmanaged(), vertexColor.ToUnmanaged(), maxLOD, patchSize, smoothFactor),
typeof(TerrainSceneNode));
}
/// <summary>
/// Adds a heightmap-based terrain on the scene
/// </summary>
/// <returns>The terrain node</returns>
/// <param name="heightMap">Relative or non-relative path to the heightmap.</param>
/// <param name="parent">Parent from the terrain</param>
/// <param name="id">ID (-1 for automatic assign.)</param>
/// <param name="position">Position of the node</param>
/// <param name="rotation">Rotation of the node</param>
/// <param name="scale">Scale of the node</param>
/// <param name="vertexColor">Default color of all the vertices used if no texture is assigned to the node.</param>
/// <param name="maxLOD">Maximal LOD, set 5 or change it ONLY IF YOU KNOW WHAT YOU ARE DOING</param>
/// <param name="patchSize">PatchSize, should be 17 and you mustn't change it unless you know what you're doing</param>
public TerrainSceneNode AddTerrainSceneNode(string heightMap, SceneNode parent, int id, Vector3D position, Vector3D rotation, Vector3D scale, Color vertexColor, int maxLOD, TerrainPatchSize patchSize, int smoothFactor)
{
IntPtr par = IntPtr.Zero;
if(parent != null)
par = parent.Raw;
return (TerrainSceneNode)
NativeElement.GetObject(SceneManager_AddTerrainSceneNode(_raw, heightMap, par, id, position.ToUnmanaged(), rotation.ToUnmanaged(), scale.ToUnmanaged(), vertexColor.ToUnmanaged(), maxLOD, patchSize, smoothFactor),
typeof(TerrainSceneNode));
}
static extern IntPtr SceneManager_AddTerrainSceneNodeFromRawData(IntPtr scenemanager, [MarshalAs(UnmanagedType.LPArray,SizeParamIndex=2)] float[,] data, int size, int width, IntPtr parent, int id, float[] position, float[] rotation, float[] scale, int[] vertexColor, int maxLOD, TerrainPatchSize patchSize, int smoothFactor);
static extern IntPtr SceneManager_AddTerrainSceneNode(IntPtr scenemanager, string TreeXML, IntPtr parent, int id, float[] position, float[] rotation, float[] scale, int[] vertexColor, int maxLOD, TerrainPatchSize patchSize, int smoothFactor);
static extern IntPtr SceneManager_AddTerrainSceneNode(IntPtr scenemanager, string heightMap, IntPtr parent, int id, float[] position, float[] rotation, float[] scale, int[] vertexColor,int maxLOD, TerrainPatchSize patchSize);
