Method intersect

Source/Engine/CSG/CSGMesh.cpp:139–172

}

void CSG::Mesh::intersect(const Mesh* other, PolygonOperation insideOp, PolygonOperation outsideOp)
{
    // insideOp - operation for polygons being inside the other brush
    // outsideOp - operation for polygons being outside the other brush

    // Prevent from redundant action
    if (insideOp == Keep && outsideOp == Keep)
        return;

    // Check every sub brush from other mesh
    int32 count = other->_brushesMeta.Count();
    for (int32 subMeshIndex = 0; subMeshIndex < count; subMeshIndex++)
    {
        auto& brushMeta = other->_brushesMeta[subMeshIndex];

        // Check if can intersect with that sub mesh data
        if (!AABB::IsOutside(brushMeta.Bounds, _bounds))
        {
            PolygonOperation iOp = insideOp;
            PolygonOperation oOp = outsideOp;

            if (brushMeta.Mode == Mode::Subtractive)
            {
                iOp = Remove;
                oOp = Keep;
            }

            intersectSubMesh(other, subMeshIndex, iOp, oOp);
        }
    }

    // Update bounds
    updateBounds();
}

void CSG::Mesh::intersectSubMesh(const Mesh* other, int32 subMeshIndex, PolygonOperation insideOp, PolygonOperation outsideOp)
{