Question

I have two for loops and I wanna save that data in one array. The first for loop will create 5 rectangles in the array. After that, the second for loop will create 5 rectangles and add them to the array. But something doesn’t work. I get that “Index was outside the bounds of the array” error message in the last line of the code and I don’t know what to change.

int framewidth = texture.Width / sourceRects.Length; 
int frameheight = texture.Height; 

private void vorrück(Rectangle[] sourceRects, int framewidth, int frameheight) 
    { 
        int doublelenght = sourceRects.Length * 2; 
        for (int i = 0; i < sourceRects.Length; i++) 
            sourceRects[i] = new Rectangle(i * framewidth, 0, framewidth, frameheight); 
        for (int normallenght = sourceRects.Length; normallenght < doublelenght; normallenght++) 
            sourceRects[normallenght] = new Rectangle((sourceRects.Length - 1 - normallenght) * framewidth, 0, framewidth, frameheight);      
    }

Answer 1

You need a bigger array.

The second loop very clearly writes outside the bounds, the relevant details are:

for (int normallenght = sourceRects.Length; ...; ...) 
        sourceRects[normallenght] = ...;  //  normallenght >= sourceRects.Length

As a general solution, do not use arrays so much. In this case a List<Rectangle> is probably the preferred datastructure.