Method CollectSectorCollisionMeshTriangles

TombEngine/Game/room.cpp:140–542

}

void RoomData::CollectSectorCollisionMeshTriangles(CollisionMeshDesc& desc,
												   const FloorInfo& sector,
												   const FloorInfo& sectorNorth, const FloorInfo& sectorSouth,
												   const FloorInfo& sectorEast, const FloorInfo& sectorWest)
{
	constexpr auto SECTOR_SURFACE_COUNT = 2;

	struct SectorVertexData
	{
		struct SurfaceData
		{
			struct TriangleData
			{
				bool IsWall = false;

				Vector3 Vertex0 = Vector3::Zero;
				Vector3 Vertex1 = Vector3::Zero;
				Vector3 Vertex2 = Vector3::Zero;
			};

			struct NeighborData
			{
				bool IsWall = false;

				Vector3 Vertex0 = Vector3::Zero;
				Vector3 Vertex1 = Vector3::Zero;
			};

			bool IsSplit	   = false;
			bool IsSplitAngle0 = false;

			TriangleData Tri0 = {};
			TriangleData Tri1 = {};

			NeighborData NorthNeighbor = {};
			NeighborData SouthNeighbor = {};
			NeighborData EastNeighbor  = {};
			NeighborData WestNeighbor  = {};
		};

		SurfaceData Floor = {};
		SurfaceData Ceil  = {};
	};
	
	auto getSurfaceTriangleVertexY = [](const FloorInfo& sector, int relX, int relZ, int triID, bool isFloor)
	{
		constexpr auto AXIS_OFFSET = -BLOCK(0.5f);
		constexpr auto HEIGHT_STEP = BLOCK(1 / 32.0f);

		const auto& tri = isFloor ? sector.FloorSurface.Triangles[triID] : sector.CeilingSurface.Triangles[triID];

		relX += AXIS_OFFSET;
		relZ += AXIS_OFFSET;

		auto normal = tri.Plane.Normal();
		float relPlaneHeight = -((normal.x * relX) + (normal.z * relZ)) / normal.y;
		return (int)RoundToStep(tri.Plane.D() + relPlaneHeight, HEIGHT_STEP); // FAILSAFE: Round to circumvent plane query error.
	};