Matrix matrix =newMatrix();// center of 1280x640
matrix.postRotate(90,640,360);float[] points =newfloat[10];for(int i =0; i < points.length; i+=2){
points[i]= i;
points[i +1]= i *10;}
matrix.mapPoints(points);for(int i =0; i < points.length; i+=2){android.util.Log.i("CNV90",String.format(Locale.US,"(%d, %d) > (%f, %f)",
i, i *10, points[i], points[i +1]));}