Method Get2DPosition

TombEngine/Renderer/RendererHelper.cpp:548–578

	}

	std::optional<Vector2> Renderer::Get2DPosition(const Vector3& pos) const
	{
		auto point = Vector4(pos.x, pos.y, pos.z, 1.0f);
		auto cameraPos = Vector4(
			_gameCamera.Camera.WorldPosition.x,
			_gameCamera.Camera.WorldPosition.y,
			_gameCamera.Camera.WorldPosition.z,
			1.0f);
		auto cameraDir = Vector4(
			_gameCamera.Camera.WorldDirection.x,
			_gameCamera.Camera.WorldDirection.y,
			_gameCamera.Camera.WorldDirection.z,
			1.0f);

		// Point is behind camera; return nullopt.
		if ((point - cameraPos).Dot(cameraDir) < 0.0f)
			return std::nullopt;

		// Calculate clip space coords.
		point = Vector4::Transform(point, _gameCamera.Camera.ViewProjection);

		// w is close to 0; return nullopt.
		if (std::abs(point.w) <= EPSILON)
			return std::nullopt;

		// Calculate NDC.
		point /= point.w;

		// Calculate and return 2D position.
		return TEN::Utils::ConvertNDCTo2DPosition(Vector2(point));
	}

	std::pair<Vector3, Vector3> Renderer::GetRay(const Vector2& pos) const
	{