private static GeneratedMeshDescription[] GetMeshDescriptions(Int32 treeNodeID,
MeshQuery[] meshTypes,
VertexChannelFlags vertexChannelMask)
{
if (meshTypes == null)
{
throw new ArgumentNullException("meshTypes");
}
if (meshTypes.Length == 0)
{
return(null);
}
Int32 meshDescriptionCount;
GCHandle nativeMeshTypeHandle = GCHandle.Alloc(meshTypes, GCHandleType.Pinned);
IntPtr nativeMeshTypePtr = nativeMeshTypeHandle.AddrOfPinnedObject();
var result = GenerateMeshDescriptions(treeNodeID, meshTypes.Length, nativeMeshTypePtr, vertexChannelMask, out meshDescriptionCount);
nativeMeshTypeHandle.Free();
if (!result || meshDescriptionCount == 0)
{
return(null);
}
var meshDescriptions = new GeneratedMeshDescription[meshDescriptionCount];
var meshDescriptionsHandle = GCHandle.Alloc(meshDescriptions, GCHandleType.Pinned);
var meshDescriptionsPtr = meshDescriptionsHandle.AddrOfPinnedObject();
result = GetMeshDescriptions(treeNodeID, meshDescriptionCount, meshDescriptionsPtr);
meshDescriptionsHandle.Free();
if (!result ||
meshDescriptions[0].vertexCount <= 0 ||
meshDescriptions[0].indexCount <= 0)
{
return(null);
}
return(meshDescriptions);
}
public static MeshInstanceKey GenerateKey(GeneratedMeshDescription meshDescription)
{
return(new MeshInstanceKey(meshDescription.meshQuery, meshDescription.surfaceParameter, meshDescription.subMeshQueryIndex));
}
/// <summary>Creates and returns a <see cref="RealtimeCSG.Foundation.GeneratedMeshContents"/> for a given <see cref="RealtimeCSG.Foundation.GeneratedMeshDescription"/> created by <see cref="RealtimeCSG.Foundation.CSGTree.GetMeshDescriptions"/></summary>
/// <remarks>See the [Create Unity Meshes](~/documentation/createUnityMesh.md) article for more information.</remarks>
/// <param name="meshDescription">A <see cref="RealtimeCSG.Foundation.GeneratedMeshDescription"/> created by <see cref="RealtimeCSG.Foundation.CSGTree.GetMeshDescriptions"/>.</param>
/// <returns>A <see cref="RealtimeCSG.Foundation.GeneratedMeshContents"/> that can be used to initialize a [UnityEngine.Mesh](https://docs.unity3d.com/ScriptReference/Mesh.html) with.</returns>
/// <seealso cref="RealtimeCSG.Foundation.CSGTree.GetMeshDescriptions"/>
public GeneratedMeshContents GetGeneratedMesh(GeneratedMeshDescription meshDescription)
{
return(GetGeneratedMesh(treeNodeID, meshDescription));
}
private static GeneratedMeshContents GetGeneratedMesh(int treeNodeID, GeneratedMeshDescription meshDescription)
{
if (meshDescription.vertexCount <= 0 ||
meshDescription.indexCount <= 0)
{
Debug.LogWarning(string.Format("{0} called with a {1} that isn't valid", typeof(CSGTree).Name, typeof(GeneratedMeshDescription).Name));
return(null);
}
var generatedMesh = new GeneratedMeshContents();
var usedVertexChannels = meshDescription.meshQuery.UsedVertexChannels;
var vertexCount = meshDescription.vertexCount;
var indexCount = meshDescription.indexCount;
var meshIndex = meshDescription.meshQueryIndex;
var subMeshIndex = meshDescription.subMeshQueryIndex;
generatedMesh.description = meshDescription;
// create our arrays on the managed side with the correct size
generatedMesh.tangents = ((usedVertexChannels & VertexChannelFlags.Tangent) != 0) ? new Vector4[vertexCount] : null;
generatedMesh.normals = ((usedVertexChannels & VertexChannelFlags.Normal) != 0) ? new Vector3[vertexCount] : null;
generatedMesh.uv0 = ((usedVertexChannels & VertexChannelFlags.UV0) != 0) ? new Vector2[vertexCount] : null;
generatedMesh.positions = new Vector3[vertexCount];
generatedMesh.indices = new int[indexCount];
GCHandle indicesHandle = GCHandle.Alloc(generatedMesh.indices, GCHandleType.Pinned);
GCHandle positionHandle = GCHandle.Alloc(generatedMesh.positions, GCHandleType.Pinned);
GCHandle tangentHandle = new GCHandle();
GCHandle normalHandle = new GCHandle();
GCHandle uv0Handle = new GCHandle();
IntPtr indicesPtr = indicesHandle.AddrOfPinnedObject();
IntPtr positionPtr = positionHandle.AddrOfPinnedObject();
IntPtr tangentPtr = IntPtr.Zero;
IntPtr normalPtr = IntPtr.Zero;
IntPtr uv0Ptr = IntPtr.Zero;
if (generatedMesh.tangents != null)
{
tangentHandle = GCHandle.Alloc(generatedMesh.tangents, GCHandleType.Pinned); tangentPtr = tangentHandle.AddrOfPinnedObject();
}
if (generatedMesh.normals != null)
{
normalHandle = GCHandle.Alloc(generatedMesh.normals, GCHandleType.Pinned); normalPtr = normalHandle.AddrOfPinnedObject();
}
if (generatedMesh.uv0 != null)
{
uv0Handle = GCHandle.Alloc(generatedMesh.uv0, GCHandleType.Pinned); uv0Ptr = uv0Handle.AddrOfPinnedObject();
}
var boundsCenter = Vector3.zero;
var boundsSize = Vector3.zero;
var result = GetGeneratedMesh((Int32)treeNodeID,
(Int32)meshIndex,
(Int32)subMeshIndex,
(Int32)indexCount,
indicesPtr,
(Int32)vertexCount,
positionPtr,
tangentPtr,
normalPtr,
uv0Ptr,
out boundsCenter,
out boundsSize);
if (generatedMesh.uv0 != null)
{
uv0Handle.Free();
}
if (generatedMesh.normals != null)
{
normalHandle.Free();
}
if (generatedMesh.tangents != null)
{
tangentHandle.Free();
}
positionHandle.Free();
indicesHandle.Free();
if (!result)
{
return(null);
}
generatedMesh.bounds = new Bounds(boundsCenter, boundsSize);
return(generatedMesh);
}
