CODEWITHSUNDEEP
iphoneobjective-ccgrect
drucifer
drucifer

Reputation: 65

CGRectContainsRect Not Working

I'm having problems with this method. I have two rectangles that are obviously contained within each other.(I've even graphed their coordinates manually to make sure.) When I use CGRectContainsRect to compare these two rectangles, it returns false. For the life of me, I have tried everything, scoured the net, and I can't find an answer to this problem. Anyone have any idea why? I've included the values for the CGRects when I debug to show that they are definitely within each other.

-(bool)checkBoundingBox {
    bool returnItem = YES;

    //Checks for sprite interaction
    for (int i = 0; i < [arrGameItems count]; i++) {
        CGRect rect2 = [[self getChildByTag:1] boundingBox];
        CGRect rect1 = [[self getChildByTag:3] boundingBox];

        //        rect1 = CGRectStandardize(rect1);
        //        rect2 = CGRectStandardize(rect2);

        if (CGRectContainsRect(rect2, rect1)) {
            CCLOG(@"removed child b*&ch");
            [self removeChildByTag:[arrGameItems count] cleanup:YES];
            returnItem = NO;
        }
    }   

    CCLOG(@"g-dammit");    
    return returnItem;
}

rect1 origin x = 141 y = 76, height = 25, width = 25

rect2 origin x = 127 y = 91, height = 25, width = 25

Upvotes: 5

Views: 5813

Answers (2)

Michael Frederick
Michael Frederick

Reputation: 16714

rect1 does not contain rect2 in your example.

Rect 1 x coordinates span from 141 to 166. Rect 2 x coordinates span from 127 to 152.

Therefor, rect2 is not contained within rect1 (because rect2 exists within x coordinates 127-140, and rect1 does not exist in those coordinates).

Upvotes: 0

Shubhank
Shubhank

Reputation: 21805

CGRectContainsRect() checks if one rectangle completely encompasses another, not just if they intersect. From your coordinates, the rectangles don't contain each other, but just intersect. You're looking for CGRectIntersectsRect().

Upvotes: 24

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