How to Apply transformation to Polygon object in Java

Question

i have made a transform and rendered a Polygon object with it(mesh is of type Polygon):

    at.setToTranslation(gameObject.position.x, gameObject.position.y);
           


        

Answer 1

If AffineTransform#createTransformedShape doesn't provide the desired result for Polygons (as it seems to be the case), you can split the Polygon into Points, transform each Point and combine into a new Polygon. Try:

//Polygon mesh
//AffineTransform at

int[] x = mesh.xpoints;
int[] y = mesh.ypoints;
int[] rx = new int[x.length];
int[] ry = new int[y.length];

for(int i=0; i<mesh.npoints; i++){
  Point2d p = new Point2d.Double(x[i], y[i]);
  at.transform(p,p);
  rx[i]=p.x;
  ry[i]=p.y;
}

mesh = new Polygon(rx, ry, mesh.npoints)