Using a C4Slider to modulate the number of points in a C4Shape.

C4Workspace.m

//
//  C4WorkSpace.m
//  ShapeSlider
//
//  Created by Adam Tindale on 2013-06-01.
//

#import "C4WorkSpace.h"

@implementation C4WorkSpace
{
    C4Slider * slid;
    C4Shape * s; 
    CGPoint p[100];  
    
}

-(void)setup
{
    slid = [C4Slider slider:CGRectMake(0, 0, self.canvas.width, 20)];
    [slid runMethod:@"blarg:" target:self forEvent:VALUECHANGED];
    [self.canvas addUIElement:slid];
    
 
    for (int i = 0; i < 100; i++)
    {
        p[i] = CGPointMake( [C4Math randomIntBetweenA:0 andB:self.canvas.width] ,[C4Math randomIntBetweenA:0 andB:self.canvas.height] );
    }
    s = [C4Shape polygon:p pointCount:4];
    [self.canvas addShape:s];
}


-(void)blarg: (C4Slider *) sender
{
    int temp = sender.value * 100;

    [self.canvas removeObject:s];
    s = [C4Shape polygon:p pointCount:temp];
    [self.canvas addShape:s];
}
@end