Function computeProjMatrix

TheForceEngine/TFE_System/math.cpp:36–51

	}

	Mat4 computeProjMatrix(f32 fovInRadians, f32 aspectRatio, f32 zNear, f32 zFar)
	{
		// Build a projection matrix.
		const f32 yScale = 1.0f / tanf(fovInRadians * 0.5f);
		const f32 xScale = yScale / aspectRatio;
		const f32 zScale = zFar / (zNear - zFar);
		const f32 wScale = zNear * zFar / (zNear - zFar);

		Mat4 r;
		r.m0 = { xScale, 0.0f, 0.0f, 0.0f };
		r.m1 = { 0.0f, yScale, 0.0f, 0.0f };
		r.m2 = { 0.0f, 0.0f, zScale, wScale };
		r.m3 = { 0.0f, 0.0f, -1.0f, 0.0f };

		return r;
	}

	Mat4 computeProjMatrixExplicit(f32 xScale, f32 yScale, f32 zNear, f32 zFar)
	{