Method Build

Source/Engine/CSG/CSGMesh.Build.cpp:9–317

#include "Engine/Core/Log.h"

void CSG::Mesh::Build(Brush* parentBrush)
{
    struct EdgeIntersection
    {
        int32 EdgeIndex;
        int32 PlaneIndices[2];

        EdgeIntersection()
        {
            EdgeIndex = INVALID_INDEX;
        }

        EdgeIntersection(int32 edgeIndex, int32 planeIndexA, int32 planeIndexB)
        {
            EdgeIndex = edgeIndex;
            PlaneIndices[0] = planeIndexA;
            PlaneIndices[1] = planeIndexB;
        }
    };

    struct PointIntersection
    {
        // TODO: optimize this shit?
        int32 VertexIndex;
        Array<EdgeIntersection> Edges;
        Array<int32> PlaneIndices;

        PointIntersection()
        {
            VertexIndex = INVALID_INDEX;
        }

        PointIntersection(int32 vertexIndex, const Array<int32>& planes)
        {
            VertexIndex = vertexIndex;
            PlaneIndices = planes;
        }
    };

    // Clear
    _bounds.Clear();
    _surfaces.Clear();
    _polygons.Clear();
    _edges.Clear();
    _vertices.Clear();
    _brushesMeta.Clear();

    // Get brush planes
    if (parentBrush == nullptr)
        return;
    auto mode = parentBrush->GetBrushMode();
    parentBrush->GetSurfaces(_surfaces);
    int32 surfacesCount = _surfaces.Count();
    if (surfacesCount > 250)
    {
        LOG(Error, "CSG brush has too many planes: {0}. Cannot process it!", surfacesCount);
        return;
    }