Advanced Examples probability

C4Workspace.m

//
//  C4WorkSpace.m
//  Examples
//
//  Created by Greg Debicki.
//

@implementation C4WorkSpace {
    C4Shape *circle;
    CGFloat red, blue, grey;
    NSInteger rc, bc, gc;
    C4Label *rl, *bl, *gl;
}

-(void)setup {
    // percent chance of each color being chosen (total must equal 100)
    red = 30.0f;
    blue = 55.0f;
    grey = 15.0f;
    
    [self setupCircle];
    [self setupLabels];
    [self runMethod:@"changeColors" afterDelay:1.0f];
    [self.canvas addShape:circle];
}

-(void) changeColors {
    [self weightedProbability];
    [self updateLabels];
    circle.animationDuration = 0.0f;
    circle.strokeEnd = 0.0f;
    circle.animationDuration = 1.3f;
    circle.strokeEnd = 1.0f;
    [self runMethod:@"changeColors" afterDelay:1.5f];
}

-(void)weightedProbability {
    CGFloat chance = [C4Math randomInt:100];
    if (chance <= red) {
        circle.fillColor = C4RED;
        rc++;
    }
    if (chance > red && chance <= red + blue){
        circle.fillColor = C4BLUE;
        bc++;
    }
    if (chance > red + blue && chance <= red + blue + grey){
        circle.fillColor = C4GREY;
        gc++;
    }
}

-(void) setupCircle {
    circle = [C4Shape ellipse:CGRectMake(0, 0, 200, 200)];
    circle.center = self.canvas.center;
    circle.animationOptions = LINEAR;
    circle.strokeColor = [UIColor blackColor];
    circle.rotation -= PI/2;
    circle.lineWidth = 10.0f;
    circle.fillColor = [UIColor clearColor];
}

-(void) setupLabels {
    [self updateLabels];
    NSString *rs = [NSString stringWithFormat:@"Red has been chosen %3i times", rc];
    NSString *bs = [NSString stringWithFormat:@"Blue has been chosen %3i times", bc];
    NSString *gs = [NSString stringWithFormat:@"Grey has been chosen %3i times", gc];
    rl = [C4Label labelWithText:rs];
    bl = [C4Label labelWithText:bs];
    gl = [C4Label labelWithText:gs];
    
    CGPoint labelCenter = self.canvas.center;
    labelCenter.y += 150;
    rl.center = labelCenter;
    labelCenter.y += 30;
    bl.center = labelCenter;
    labelCenter.y += 30;
    gl.center = labelCenter;
    [self.canvas addObjects:@[rl, bl, gl]];
}

-(void) updateLabels {
    NSString *rs = [NSString stringWithFormat:@"Red has been chosen %i times", rc];
    NSString *bs = [NSString stringWithFormat:@"Blue has been chosen %i times", bc];
    NSString *gs = [NSString stringWithFormat:@"Grey has been chosen %i times", gc];
    rl.text = rs;
    bl.text = bs;
    gl.text = gs;
    
}


@end