OpenGLES/CCViewController.m



#import "CCViewController.h"

@interface CCViewController ()
@property (weak, nonatomic) IBOutlet UIView *containerView;


@property (strong, nonatomic) IBOutlet UIView *view0;
@property (strong, nonatomic) IBOutlet UIView *view1;
@property (strong, nonatomic) IBOutlet UIView *view2;
@property (strong, nonatomic) IBOutlet UIView *view3;
@property (strong, nonatomic) IBOutlet UIView *view4;
@property (strong, nonatomic) IBOutlet UIView *view5;


@property(nonatomic,strong)NSArray *faces;
@property (nonatomic, strong) CADisplayLink *displayLink;
@property (nonatomic, assign) NSInteger angle;
@end

@implementation CCViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    //添加面
    [self addCFaces];
    //添加CADisplayLink
    [self addCADisplayLink];
}

-(void) addCADisplayLink{
    
    self.angle = 0;
    self.displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(update)];
    [self.displayLink addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes];
}

-(void)addCFaces
{
    self.faces = @[_view0,_view1,_view2,_view3,_view4,_view5];
    
    //父View的layer图层
    CATransform3D perspective = CATransform3DIdentity;
    //m34影响到透视关系 参考 https://www.jianshu.com/p/3dd14cfbdc53
    perspective.m34 = -1.0 / 500.0;
    perspective = CATransform3DRotate(perspective, -M_PI_4, 1, 0, 0);
    perspective = CATransform3DRotate(perspective, -M_PI_4, 0, 1, 0);
        //特别注意：旋转时，我们需要同时作用于6个子layer，所以请留意self.animateCube.layer.sublayerTransform = transform中使用的是sublayerTransform而非transform
    self.containerView.layer.sublayerTransform = perspective;
    
    //add cube face 1:正面---沿着Z轴的正方向平移100个单元
    CATransform3D transform = CATransform3DMakeTranslation(0, 0, 100);
    [self addFace:0 withTransform:transform];
    
    //add cube face 2:右边的面 --- 沿着X轴的正方向平移100个单元 然后沿着Y轴逆时针旋转90度
    transform = CATransform3DMakeTranslation(100, 0, 0);
    transform = CATransform3DRotate(transform, M_PI_2, 0, 1, 0);
    [self addFace:1 withTransform:transform];
    
    //add cube face 3:底面 --- 沿着Y轴的负方向平移100个单元 然后沿着X轴逆时针旋转90度
    transform = CATransform3DMakeTranslation(0, -100, 0);
    transform = CATransform3DRotate(transform, M_PI_2, 1, 0, 0);
    [self addFace:2 withTransform:transform];

    //add cube face 4:顶面 --- 沿着Y轴的正方向平移100个单元 然后沿着X轴顺时针旋转90度
    transform = CATransform3DMakeTranslation(0, 100, 0);
    transform = CATransform3DRotate(transform, -M_PI_2, 1, 0, 0);
    [self addFace:3 withTransform:transform];
    
    //add cube face 5:左边的面 --- 沿着X轴的负数方向平移100个单元 然后沿着Y轴顺时针旋转90度
    transform = CATransform3DMakeTranslation(-100, 0, 0);
    transform = CATransform3DRotate(transform, -M_PI_2, 0, 1, 0);
    [self addFace:4 withTransform:transform];
    
    //add cube face 6:背面 --- 沿着Z轴的负数方向平移100个单元 然后沿着Y轴顺时针旋转180度
    transform = CATransform3DMakeTranslation(0, 0, -100);
    transform = CATransform3DRotate(transform, M_PI, 0, 1, 0);
    [self addFace:5 withTransform:transform];
    
}

- (void)addFace:(NSInteger)index withTransform:(CATransform3D)transform
{
    //获取face视图并将其添加到容器中
    UIView *face = self.faces[index];
    [self.containerView addSubview:face];
    
    //将face视图放在容器的中心
    CGSize containerSize = self.containerView.bounds.size;
    face.center = CGPointMake(containerSize.width / 2.0, containerSize.height / 2.0);
    
    //添加transform
    face.layer.transform = transform;
}

- (void)update {
    //1.计算旋转度数
    self.angle = (self.angle + 5) % 360;
    float deg = self.angle * (M_PI / 180);
    CATransform3D temp = CATransform3DIdentity;
    temp = CATransform3DRotate(temp, deg, 0.3, 1, 0.7);
    self.containerView.layer.sublayerTransform = temp;
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end