trurl-master

export function rotateSize(width: number, height: number, rotation: number): { width: number, height: number } {
  const rotRad = (rotation * Math.PI) / 180

  return {
     width: Math.abs(Math.cos(rotRad) * width) + Math.abs(Math.sin(rotRad) * height),
     height: Math.abs(Math.sin(rotRad) * width) + Math.abs(Math.cos(rotRad) * height),
   }
 }

trurl-master

/**
  Welcome to the reverse engineering hell!

  The idea is to disable pointer interactions with the board
  (with the exception of my pieces) when my piece is selected
  
  Known issues:
  - it won't work if your pieces are on top ("flipped" check
    that is used to determine "my" pieces is wrong in that case)
*/