Function UpdateSplatMap

Source/Engine/Terrain/TerrainPatch.cpp:362–397

}

void UpdateSplatMap(const TerrainDataUpdateInfo& info, const Color32* splatMap, const Int2& modifiedOffset, const Int2& modifiedSize, const byte* data)
{
    PROFILE_CPU_NAMED("Terrain.UpdateSplatMap");

    // TODO: use offset and size to improve performance of the data updating

    const auto splatPtr = splatMap;
    const auto ptr = (Color32*)data;
    for (int32 chunkIndex = 0; chunkIndex < Terrain::ChunksCount; chunkIndex++)
    {
        const int32 chunkX = (chunkIndex % Terrain::ChunksCountEdge);
        const int32 chunkZ = (chunkIndex / Terrain::ChunksCountEdge);

        const int32 chunkTextureX = chunkX * info.VertexCountEdge;
        const int32 chunkTextureZ = chunkZ * info.VertexCountEdge;

        const int32 chunkHeightmapX = chunkX * info.ChunkSize;
        const int32 chunkHeightmapZ = chunkZ * info.ChunkSize;

        for (int32 z = 0; z < info.VertexCountEdge; z++)
        {
            const int32 tz = (chunkTextureZ + z) * info.TextureSize;
            const int32 sz = (chunkHeightmapZ + z) * info.HeightmapSize;

            for (int32 x = 0; x < info.VertexCountEdge; x++)
            {
                const int32 tx = chunkTextureX + x;
                const int32 sx = chunkHeightmapX + x;
                const int32 textureIndex = tz + tx;
                const int32 heightmapIndex = sz + sx;

                ptr[textureIndex] = splatPtr[heightmapIndex];
            }
        }
    }
}

void UpdateSplatMap(const TerrainDataUpdateInfo& info, const Color32* splatMap, const byte* data)
{