Question

I have 2 arrays of ints I am using to create a polygon (that looks like a fish). What do I need to do to the arrays to flip the polygon horizontally?

x = new int[]
   { 0, 18, 24, 30, 48, 60, 60, 54, 60, 48, 30, 24, 0 };
y = new int[]
   { 0, 18, 6, 0, 0, 12, 18, 24, 24, 36, 36, 30, 36 };

Answer 1

You need to find the maximum value of the x array. In this case it is 60. Then set each x coordinate to 60 - x using a loop, like this:

for (i = 0; i < NUMBER_OF_POINTS; i++) {
    x[i] = MAX_X - x[i];
}