Possible Day 1 Code

C4WorkSpace.m

//
//  C4WorkSpace.m
//  Possible Day 1 for ITP
//
//  Created by Travis Kirton on 12-07-23.
//


#import "C4WorkSpace.h"

@implementation C4WorkSpace {
    NSMutableSet *allShapes;
    C4Shape *baseShape;
    NSInteger swirlDirection;
}

-(void)setup {
    allShapes = [NSMutableSet new];
    
    swirlDirection = 1;
    
    C4Shape *swirl = [self createSwirlyThingWithBaseFrame:CGRectMake(0, 0, 96, 96)];
    swirl.center = self.canvas.center;
    [self.canvas addShape:swirl];
    
    C4Shape *swirl2 = [self createSwirlyThingWithBaseFrame:CGRectMake(0,0,64,64)];
    swirl2.center = CGPointMake(self.canvas.width / 4, self.canvas.width / 4);
    [self.canvas addShape:swirl2];
    
    C4Shape *swirl3 = [self createSwirlyThingWithBaseFrame:CGRectMake(0,0,64,64)];
    swirl3.center = CGPointMake(self.canvas.width * 3 / 4, self.canvas.width / 4);
    [self.canvas addShape:swirl3];

    C4Shape *swirl4 = [self createSwirlyThingWithBaseFrame:CGRectMake(0,0,64,64)];
    swirl4.center = CGPointMake(self.canvas.width / 4, self.canvas.height - self.canvas.width / 4);
    [self.canvas addShape:swirl4];
    
    C4Shape *swirl5 = [self createSwirlyThingWithBaseFrame:CGRectMake(0,0,64,64)];
    swirl5.center = CGPointMake(self.canvas.width * 3 / 4, self.canvas.height - self.canvas.width / 4);
    [self.canvas addShape:swirl5];

    for(C4Shape *s in allShapes) [self animate:s];
}

-(C4Shape *)createSwirlyThingWithBaseFrame:(CGRect)baseFrame {
    
    baseShape = [C4Shape rect:baseFrame];
    
    CGPoint anchor = CGPointMake(-0.5,0.5);
    [self createAddShapesForAnchorPoint:anchor];

    anchor = CGPointMake(0.5,-0.5);
    [self createAddShapesForAnchorPoint:anchor];

    anchor = CGPointMake(1.5,0.5);
    [self createAddShapesForAnchorPoint:anchor];

    anchor = CGPointMake(0.5,1.5);
    [self createAddShapesForAnchorPoint:anchor];

    baseShape.center = self.canvas.center;
        
    return baseShape;
}

-(void)createAddShapesForAnchorPoint:(CGPoint)anchor {
    NSMutableArray *newShapes = [@[] mutableCopy];
    [newShapes addObject:baseShape];
    for(int i = 1; i < 10; i++) {
        CGRect frame;
        frame = ((C4Shape *)newShapes[i-1]).frame;
        frame.size.width *= .75;
        frame.size.height *= .75;
        
        C4Shape *currentShape = [C4Shape ellipse:frame];
        [[newShapes lastObject] addShape:currentShape];
        [newShapes addObject:currentShape];
    }
    
    for(int i = [newShapes count] - 1; i > 0; i--) {
        C4Shape *small = newShapes[i];
        C4Shape *larger = newShapes[i-1];
        
        small.anchorPoint = anchor;
        small.center = larger.center;
    }

    [allShapes addObjectsFromArray:newShapes];
}

-(void)animate:(C4Shape *)shape {
    shape.animationDuration = 8.0f;
    shape.animationOptions = REPEAT;
    shape.rotation = TWO_PI * swirlDirection;
    swirlDirection *= -1;
}

@end