CODEWITHSUNDEEP
c#listxna
user2977903
user2977903

Reputation: 25

Adding rectangles to a list via a for loop and then drawing them to the screen

I am building a basic clone of breakout using C# and XNA. All the code seems to be working well except when trying to create and draw the blocks to the screen.

In the LoadContent() method I used a for loop I tried to add 10 rectangles to a rectangle list (just for testing) with changing X and Y values.

int xChange = 0;
int yChange = 0;
//loop iterates 10 times as a test
for (int i = 0; i == 10; i++)
{
    rectList.Add(new Rectangle(100+xChange, 200+ yChange, 40, 80));
    xChange += 100;
    yChange += 50;
}

Then in the draw method I used a foreach loop to draw each of these:

foreach (Rectangle rect in rectList)
{
    spriteBatch.Draw(block, rect,  Color.White);
}

When I run this code nothing draws and I'm not sure why. Full code can be found at http://pastebin.com/TNbzgUqn.

EDIT: By adding a rectangle manually (not in a loop) I got a rectangle to draw. This narrows it down to the for loop in which the rectangles are added to the list.

//The code below draws, the code above does not
Rectangle test1 = new Rectangle(200, 200, 40, 80);
rectList.Add(test1);

Upvotes: 0

Views: 2062

Answers (1)

user41732
user41732

Reputation: 46

From MSDN:

By using a for loop, you can run a statement or a block of statements repeatedly until a specified expression evaluates to false.

Your for loop is saying: starting from 0, do the following while i is equal to 10. Which will always be false. You should instead use:

for(int i = 0; i <= 10; i++)
{
 // your code here
}

Upvotes: 3

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