Question

so I would like to create a circle shape with primitives on cocos2d and then use it as a sprite, How can I do it please ?
I know that I have to use something like this :

glLineWidth(16);
glColor4ub(0, 255, 0, 255);
drawCircle( ccp(s.width/2, s.height/2), 100, 0, 10, NO);

But it’s hard for me to understand how it works and How to use it as a sprite

Answer 1

do you really need CCSprite instance? you can create a subclass of CCNode, then in its

- (void) draw

method put your code there. your circle will have it’s center position (0.f, 0.f)

@implementation MyScene

- (void) onEnter
{
    [super onEnter];
    CCNode* myNode = [MyNodeSubclass node];
    [node setPosition: someRandomPosition ];
    [self addChild: node];
}

@end

@implementation MyNodeSubclass

- (void) draw
{
    glColor4f(255, 255, 255, 255);
    CCPoint center = ccp(0.f, 0.f);
    CGFloat radius = 10.f;
    CGFloat angle = 0.f;
    NSInteger segments = 10;
    BOOL drawLineToCenter = YES;

    ccDrawCircle(center, radius, angle, segments, drawLineToCenter);    
}

@end

wrote this piece of code right here, didn’t copy from xcode, but it should work as you want. ccDrawCircle is a cocos2d function, declared in CCDrawingPrimitives.h