Expression | Rotate Image

sourceWidth = width/2;
sourceHeight = height/2;
diagonal = Math.sqrt(sourceWidth * sourceWidth + sourceHeight * sourceHeight);
sinB = sourceWidth/diagonal;
sourceRotation = Math.abs(rotation.value);
a0 = radiansToDegrees(Math.asin(sinB));
a1 = a0 - sourceRotation;
x = sourceWidth - sourceHeight * Math.tan(degreesToRadians(a1));
ratio = width/(width + x*2);
value / (ratio)