////////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary> Verifies that the lightmap mesh data is compatible with the loaded bsp. </summary>
///
/// <param name="lightmapMeshes"> The lightmap meshes. </param>
/// <param name="BSP"> The bsp. </param>
///
/// <returns> true if it passes, false if it fails. </returns>
bool VerifyMeshData(List <Lightmap> lightmapMeshes, structure_bsp_group BSP)
{
// Verify the BSP matches the loaded geometry
foreach (var lightmap in lightmapMeshes)
{
// Get the lightmap objects from the bsp and collada file
if (lightmap.LightmapIndex < 0 || lightmap.LightmapIndex >= BSP.Lightmaps.Count)
{
SendMessage(String.Format("A mesh in the COLLADA file has an out of bounds lightmap index ({0})", lightmap.LightmapIndex));
return(false);
}
var bspLightmap = BSP.Lightmaps[lightmap.LightmapIndex];
// Check the face count matches
int colladaFaceCount = lightmap.Faces.Count;
int bspFaceCount = 0;
bspLightmap.Materials.Elements.ForEach(entry => bspFaceCount += entry.SurfaceCount);
SendMessage(String.Format("COLLADA lightmap mesh {0}'s face count: {1}", lightmap.LightmapIndex, colladaFaceCount));
SendMessage(String.Format("BSP lightmap mesh {0}'s face count: {1}", lightmap.LightmapIndex, bspFaceCount));
if (colladaFaceCount != bspFaceCount)
{
SendMessage(String.Format("COLLADA lightmap mesh {0}'s face count does not match the bsp", lightmap.LightmapIndex));
return(false);
}
}
return(true);
}
////////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary> Overwrite the lightmap uv's in the target bsp. </summary>
///
/// <param name="lightmapMeshes"> The lightmap meshes. </param>
/// <param name="BSP"> The bsp. </param>
///
/// <returns> true if it succeeds, false if it fails. </returns>
bool OverwriteLightmapUVs(List <Lightmap> lightmapMeshes, structure_bsp_group BSP)
{
int bspLightmapCount = BSP.Lightmaps.Count - 1;
// Replace the vertex uv's
foreach (var lightmap in lightmapMeshes)
{
var bspLightmap = BSP.Lightmaps[lightmap.LightmapIndex];
int startFaceOffset = 0;
foreach (var material in bspLightmap.Materials)
{
// Write the lightmap UV's to the BSP's vertex data
try
{
var binaryWriter = new BinaryWriter(new MemoryStream(material.UncompressedVertices.Value));
// Skip past the normal texture coordinates
int vertexOffset = material.VerticesCount * 56;
int faceIndex = startFaceOffset;
foreach (int surfaceIndex in Enumerable.Range(0, material.SurfaceCount))
{
var colladaFace = lightmap.Faces[faceIndex];
var surface = BSP.Surfaces[material.Surfaces + surfaceIndex];
// Write the coordinate values
binaryWriter.Seek(vertexOffset + ((int)surface.A1.Value * 20) + 12, SeekOrigin.Begin);
binaryWriter.Write(colladaFace.Vertex2.X);
binaryWriter.Write(colladaFace.Vertex2.Y);
binaryWriter.Seek(vertexOffset + ((int)surface.A2.Value * 20) + 12, SeekOrigin.Begin);
binaryWriter.Write(colladaFace.Vertex1.X);
binaryWriter.Write(colladaFace.Vertex1.Y);
binaryWriter.Seek(vertexOffset + ((int)surface.A3.Value * 20) + 12, SeekOrigin.Begin);
binaryWriter.Write(colladaFace.Vertex0.X);
binaryWriter.Write(colladaFace.Vertex0.Y);
faceIndex++;
}
binaryWriter.Flush();
}
catch (Exception exception)
{
SendMessage(String.Format("Failed to write to the target BSP due to an exception: {0}", exception.Message));
return(false);
}
startFaceOffset += material.SurfaceCount;
}
}
return(true);
}
