CATransform3D matrix with values explained

gistfile1.m

        CATransform3D transformation = CATransform3DIdentity;
        // x line
        transformation.m11 = 1; // 20% less wide wall
        transformation.m12 = 0; //-1 / 10.0; // skews left up, right down if >0
        transformation.m13 = 0; // extends sideways for a short time
        transformation.m14 = 0;// // 1 / 5000 = left side towards viewer, right side away from viewer
        // y line
        transformation.m21 = 0; //-1 / 2.0; // skews bottom left, top right if <0
        transformation.m22 = 1; // .8 - 20% less tall
        transformation.m23 = 0; // extends upward for a short time
        transformation.m24 = 0;//1 / 500.0; // 1 / 500.0 = top towards the viewer
        // z line
        transformation.m31 = 0;
        transformation.m32 = 0;
        transformation.m33 = 1; // 1 makes no change
        transformation.m34 = 0;
        // repositioning all axis
        transformation.m41 = 0; //-40; // >0 pushes on x-axis right
        transformation.m42 = 0; //-20; // >0 pushes on y-axis down
        transformation.m43 = 0; // pushes on z-axis
        transformation.m44 = 1; // 0.8 - makes the layer disappear