Function b3CreateFrustum

examples/OpenGLWindow/SimpleCamera.cpp:109–137

}

static void b3CreateFrustum(
	float left,
	float right,
	float bottom,
	float top,
	float nearVal,
	float farVal,
	float frustum[16])
{
	frustum[0 * 4 + 0] = (float(2) * nearVal) / (right - left);
	frustum[0 * 4 + 1] = float(0);
	frustum[0 * 4 + 2] = float(0);
	frustum[0 * 4 + 3] = float(0);

	frustum[1 * 4 + 0] = float(0);
	frustum[1 * 4 + 1] = (float(2) * nearVal) / (top - bottom);
	frustum[1 * 4 + 2] = float(0);
	frustum[1 * 4 + 3] = float(0);

	frustum[2 * 4 + 0] = (right + left) / (right - left);
	frustum[2 * 4 + 1] = (top + bottom) / (top - bottom);
	frustum[2 * 4 + 2] = -(farVal + nearVal) / (farVal - nearVal);
	frustum[2 * 4 + 3] = float(-1);

	frustum[3 * 4 + 0] = float(0);
	frustum[3 * 4 + 1] = float(0);
	frustum[3 * 4 + 2] = -(float(2) * farVal * nearVal) / (farVal - nearVal);
	frustum[3 * 4 + 3] = float(0);
}

#if 0
static void b3CreateDiagonalMatrix(float value, float result[4][4])