C++ (Cpp) Frustum::GetPlanes示例

示例#1

文件： Renderer.cpp 项目： tnam/MGD_Game_Engine

bool Renderer::ShouldDraw(const Renderable* renderable, const Frustum& frustum)
{
	// Testing all vertices against frustum.
	// TODO: Implement tests with bounding boxes

	const int NUM_PLANES = 6;
	bool bShouldDraw = false;

	const Plane(&planes)[NUM_PLANES] = frustum.GetPlanes();
	std::vector<Vertex> vertices = renderable->GetMesh()->GetVertices();

	for (size_t i = 0; i < vertices.size(); ++i)
	{
		unsigned int numPlanesInside = 0;
		for (size_t j = 0; j < NUM_PLANES; ++j)
		{
			if (!planes[j].IsInFront(vertices[i].position))
			{
				break;
			}
			++numPlanesInside;
		}

		if (numPlanesInside == 6)
		{
			bShouldDraw = true;
			break;
		}
	}

	return bShouldDraw;
}