CSharpGL.glm.frustum C# (CSharp) Method

        public static mat4 frustum(float left, float right, float bottom, float top, float nearVal, float farVal)
        {
            var result = mat4.identity();

            result[0, 0] = (2.0f * nearVal) / (right - left);
            result[1, 1] = (2.0f * nearVal) / (top - bottom);
            result[2, 0] = (right + left) / (right - left);
            result[2, 1] = (top + bottom) / (top - bottom);
            result[2, 2] = -(farVal + nearVal) / (farVal - nearVal);
            result[2, 3] = -1.0f;
            result[3, 2] = -(2.0f * farVal * nearVal) / (farVal - nearVal);
            result[3, 3] = 0.0f;

            return result;
        }