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GLKit實現

效果圖

image

流程

image

具體步驟

1.準備工作

定義頂點坐標，紋理坐標，法線數據結構體

typedef struct {
    GLKVector3 positionCoord;   //頂點坐標
    GLKVector2 textureCoord;    //紋理坐標
    GLKVector3 normal;          //法線
} CCVertex;

定義正方體的三角形組成的頂點個數

// 頂點數:每個面有兩個三角形組成,兩三角形6個頂點,共6個面,立方體頂點個數是6*6= 36
static NSInteger const kCoordCount = 36;

實現GLKViewDelegate

@interface CubeViewController () <GLKViewDelegate>
@end

定義GLKView對象glkView

//定義GLKView對象
@property (nonatomic, strong) GLKView *glkView;

定義GLKBaseEffect對象 baseEffect;

//定義GLKBaseEffect對象
@property (nonatomic, strong) GLKBaseEffect *baseEffect;

定義數據結構體數組 vertices

//定義數據結構體數組
@property (nonatomic, assign) CCVertex *vertices;

定義定時器對象 displayLink;

//定義定時器對象
@property (nonatomic, strong) CADisplayLink *displayLink;

記錄旋轉角度變量 angle

//記錄旋轉角度變量
@property (nonatomic, assign) NSInteger angle;

頂點緩沖區ID vertexBuffer

//頂點緩沖區ID
@property (nonatomic, assign) GLuint vertexBuffer;

OpenGL ES相關初始化 commonInit函數

1.設置View背景色

self.view.backgroundColor = [UIColor blackColor];

2.初始化上下文，設置當前上下文

//創建context
     EAGLContext *context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
    //設置當前context
    [EAGLContext setCurrentContext:context];

3.創建GLKView并設置代理

CGRect frame = CGRectMake(0, 100, self.view.frame.size.width, self.view.frame.size.width);
    self.glkView = [[GLKView alloc] initWithFrame:frame context:context];
    self.glkView.backgroundColor = [UIColor clearColor];
    self.glkView.delegate = self;

4.使用深度緩存

self.glkView.drawableDepthFormat = GLKViewDrawableDepthFormat24;
    //默認是(0, 1)，這里用于翻轉 z 軸，使正方形朝屏幕外
    glDepthRangef(1, 0);

1. 配置視圖創建的渲染緩存區

self.glkView.drawableColorFormat = GLKViewDrawableColorFormatRGBA8888;
    self.glkView.drawableStencilFormat = GLKViewDrawableStencilFormat8;
    self.glkView.drawableMultisample = GLKViewDrawableMultisample4X;

6.將GLKView 添加self.view 上

[self.view addSubview:self.glkView];

7.加載紋理數據 setUpTexture函數

獲取紋理圖片路徑

NSString *imagePath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"meimei.jpg"];
    UIImage *image = [UIImage imageWithContentsOfFile:imagePath];

設置紋理參數

NSDictionary *options = @{GLKTextureLoaderOriginBottomLeft : @(YES)};
    GLKTextureInfo *textureInfo = [GLKTextureLoader textureWithCGImage:[image CGImage] options:options error:NULL];

使用蘋果GLKit提供GLKBaseEffect完成著色器工作

self.baseEffect = [[GLKBaseEffect alloc] init];
    self.baseEffect.texture2d0.name = textureInfo.name;
    self.baseEffect.texture2d0.target = textureInfo.target;
    //開啟光照效果
    self.baseEffect.light0.enabled = YES;
    //漫反射顏色
    self.baseEffect.light0.diffuseColor = GLKVector4Make(1, 1, 1, 1);
    //光源位置
    self.baseEffect.light0.position = GLKVector4Make(-0.5, -0.5, 5, 1);

8.加載圖片頂點坐標和紋理坐標 setUpVertexData函數

設置頂點數組（頂點坐標，紋理坐標）

//開辟頂點數據空間(數據結構SenceVertex 大小 * 頂點個數kCoordCount)
    self.vertices = malloc(sizeof(CCVertex) * kCoordCount);
    
    // 前面
    self.vertices[0] = (CCVertex){{-0.5, 0.5, 0.5}, {0, 1}, {0, 0, 1}};
    self.vertices[1] = (CCVertex){{-0.5, -0.5, 0.5}, {0, 0}, {0, 0, 1}};
    self.vertices[2] = (CCVertex){{0.5, 0.5, 0.5}, {1, 1}, {0, 0, 1}};
    self.vertices[3] = (CCVertex){{-0.5, -0.5, 0.5}, {0, 0}, {0, 0, 1}};
    self.vertices[4] = (CCVertex){{0.5, 0.5, 0.5}, {1, 1}, {0, 0, 1}};
    self.vertices[5] = (CCVertex){{0.5, -0.5, 0.5}, {1, 0}, {0, 0, 1}};
    
    // 上面
    self.vertices[6] = (CCVertex){{0.5, 0.5, 0.5}, {1, 1}, {0, 1, 0}};
    self.vertices[7] = (CCVertex){{-0.5, 0.5, 0.5}, {0, 1}, {0, 1, 0}};
    self.vertices[8] = (CCVertex){{0.5, 0.5, -0.5}, {1, 0}, {0, 1, 0}};
    self.vertices[9] = (CCVertex){{-0.5, 0.5, 0.5}, {0, 1}, {0, 1, 0}};
    self.vertices[10] = (CCVertex){{0.5, 0.5, -0.5}, {1, 0}, {0, 1, 0}};
    self.vertices[11] = (CCVertex){{-0.5, 0.5, -0.5}, {0, 0}, {0, 1, 0}};
    
    // 下面
    self.vertices[12] = (CCVertex){{0.5, -0.5, 0.5}, {1, 1}, {0, -1, 0}};
    self.vertices[13] = (CCVertex){{-0.5, -0.5, 0.5}, {0, 1}, {0, -1, 0}};
    self.vertices[14] = (CCVertex){{0.5, -0.5, -0.5}, {1, 0}, {0, -1, 0}};
    self.vertices[15] = (CCVertex){{-0.5, -0.5, 0.5}, {0, 1}, {0, -1, 0}};
    self.vertices[16] = (CCVertex){{0.5, -0.5, -0.5}, {1, 0}, {0, -1, 0}};
    self.vertices[17] = (CCVertex){{-0.5, -0.5, -0.5}, {0, 0}, {0, -1, 0}};
    
    // 左面
    self.vertices[18] = (CCVertex){{-0.5, 0.5, 0.5}, {1, 1}, {-1, 0, 0}};
    self.vertices[19] = (CCVertex){{-0.5, -0.5, 0.5}, {0, 1}, {-1, 0, 0}};
    self.vertices[20] = (CCVertex){{-0.5, 0.5, -0.5}, {1, 0}, {-1, 0, 0}};
    self.vertices[21] = (CCVertex){{-0.5, -0.5, 0.5}, {0, 1}, {-1, 0, 0}};
    self.vertices[22] = (CCVertex){{-0.5, 0.5, -0.5}, {1, 0}, {-1, 0, 0}};
    self.vertices[23] = (CCVertex){{-0.5, -0.5, -0.5}, {0, 0}, {-1, 0, 0}};
    
    // 右面
    self.vertices[24] = (CCVertex){{0.5, 0.5, 0.5}, {1, 1}, {1, 0, 0}};
    self.vertices[25] = (CCVertex){{0.5, -0.5, 0.5}, {0, 1}, {1, 0, 0}};
    self.vertices[26] = (CCVertex){{0.5, 0.5, -0.5}, {1, 0}, {1, 0, 0}};
    self.vertices[27] = (CCVertex){{0.5, -0.5, 0.5}, {0, 1}, {1, 0, 0}};
    self.vertices[28] = (CCVertex){{0.5, 0.5, -0.5}, {1, 0}, {1, 0, 0}};
    self.vertices[29] = (CCVertex){{0.5, -0.5, -0.5}, {0, 0}, {1, 0, 0}};
    
    // 后面
    self.vertices[30] = (CCVertex){{-0.5, 0.5, -0.5}, {0, 1}, {0, 0, -1}};
    self.vertices[31] = (CCVertex){{-0.5, -0.5, -0.5}, {0, 0}, {0, 0, -1}};
    self.vertices[32] = (CCVertex){{0.5, 0.5, -0.5}, {1, 1}, {0, 0, -1}};
    self.vertices[33] = (CCVertex){{-0.5, -0.5, -0.5}, {0, 0}, {0, 0, -1}};
    self.vertices[34] = (CCVertex){{0.5, 0.5, -0.5}, {1, 1}, {0, 0, -1}};
    self.vertices[35] = (CCVertex){{0.5, -0.5, -0.5}, {1, 0}, {0, 0, -1}};

開辟頂點緩存區

創建頂點緩存區標識符ID

glGenBuffers(1, &_vertexBuffer);

綁定頂點緩存區

glBindBuffer(GL_ARRAY_BUFFER, _vertexBuffer);

將頂點數組的數據copy到頂點緩存區中

GLsizeiptr bufferSizeBytes = sizeof(CCVertex) * kCoordCount;
glBufferData(GL_ARRAY_BUFFER, bufferSizeBytes, self.vertices, GL_STATIC_DRAW);

打開讀取通道

頂點坐標數據 GLKVertexAttribPosition

glEnableVertexAttribArray(GLKVertexAttribPosition);glVertexAttribPointer(GLKVertexAttribPosition, 3, GL_FLOAT, GL_FALSE, sizeof(CCVertex), NULL + offsetof(CCVertex, positionCoord));

紋理坐標數據 GLKVertexAttribTexCoord0

glEnableVertexAttribArray(GLKVertexAttribTexCoord0);
glVertexAttribPointer(GLKVertexAttribTexCoord0, 2, GL_FLOAT, GL_FALSE, sizeof(CCVertex), NULL + offsetof(CCVertex, textureCoord));

法線數據 GLKVertexAttribNormal

glEnableVertexAttribArray(GLKVertexAttribNormal);
glVertexAttribPointer(GLKVertexAttribNormal, 3, GL_FLOAT, GL_FALSE, sizeof(CCVertex), NULL + offsetof(CCVertex, normal));

添加CADisplayLink定時器 addCADisplayLink

初始化定時器，并設置回調

        //CADisplayLink 類似定時器,提供一個周期性調用.屬于QuartzCore.framework中.
    //具體可以參考該博客 https://www.cnblogs.com/panyangjun/p/4421904.html
    self.angle = 0;
    self.displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(updateAngle)];
    [self.displayLink addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes];

定時器回調，設置旋轉后提交重新渲染

//計算旋轉度數
self.angle = (self.angle + 5) % 360;

//修改baseEffect.transform.modelviewMatrix
self.baseEffect.transform.modelviewMatrix = GLKMatrix4MakeRotation(GLKMathDegreesToRadians(self.angle), 0.3, 1, 0.7);

//重新渲染
[self.glkView display];

釋放資源 dealloc

當前上下文置為nil

if ([EAGLContext currentContext] == self.glkView.context) {
        [EAGLContext setCurrentContext:nil];
    }

釋放數據結構

if (_vertices) {
        free(_vertices);
        _vertices = nil;
    }

刪除頂點緩存區

if (_vertexBuffer) {
        glDeleteBuffers(1, &_vertexBuffer);
        _vertexBuffer = 0;
    }

displayLink 失效

[self.displayLink invalidate];

GLKit實現旋轉的立方體完整代碼參考：github

CoreAnimation實現

效果圖

image

流程

image

具體步驟

準備工作

IBOutlet容器View

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

IBOutlet 6個面

@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;

6個面的數組數組faces

@property(nonatomic,strong)NSArray *faces;

定時器對象

@property (nonatomic, strong) CADisplayLink *displayLink;

記錄旋轉角度

@property (nonatomic, assign) NSInteger angle;

viewDidLoad

添加立方體的6個面

self.faces = @[_view0,_view1,_view2,_view3,_view4,_view5];

將容器View先后繞X旋轉45度，繞Y軸旋轉45度

/父View的layer圖層
    CATransform3D perspective = CATransform3DIdentity;
    //m34影響到透視關系 參考 http://www.lxweimin.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);
        //特別注意：旋轉時，我們需要同時作用于6個子layer，所以請留意self.animateCube.layer.sublayerTransform = transform中使用的是sublayerTransform而非transform
    self.containerView.layer.sublayerTransform = perspective;

將6個View存儲到faces數組

1） face 1:正面---沿著Z軸的正方向平移100個單元

CATransform3D transform = CATransform3DMakeTranslation(0, 0, 100);
    [self addFace:0 withTransform:transform];

2） face 2:右邊的面 --- 沿著X軸的正方向平移100個單元然后沿著Y軸逆時針旋轉90度

transform = CATransform3DMakeTranslation(100, 0, 0);
    transform = CATransform3DRotate(transform, M_PI_2, 0, 1, 0);
    [self addFace:1 withTransform:transform];

3） face 3:底面 --- 沿著Y軸的負方向平移100個單元然后沿著X軸逆時針旋轉90度

transform = CATransform3DMakeTranslation(0, -100, 0);
    transform = CATransform3DRotate(transform, M_PI_2, 1, 0, 0);
    [self addFace:2 withTransform:transform];

4） face 4:頂面 --- 沿著Y軸的正方向平移100個單元然后沿著X軸順時針旋轉90度

transform = CATransform3DMakeTranslation(0, 100, 0);
    transform = CATransform3DRotate(transform, -M_PI_2, 1, 0, 0);
    [self addFace:3 withTransform:transform];

5） face 5:左邊的面 --- 沿著X軸的負數方向平移100個單元然后沿著Y軸順時針旋轉90度

transform = CATransform3DMakeTranslation(-100, 0, 0);
    transform = CATransform3DRotate(transform, -M_PI_2, 0, 1, 0);
    [self addFace:4 withTransform:transform];

6） face 6:背面 --- 沿著Z軸的負數方向平移100個單元然后沿著Y軸順時針旋轉180度

transform = CATransform3DMakeTranslation(0, 0, -100);
    transform = CATransform3DRotate(transform, M_PI, 0, 1, 0);
    [self addFace:5 withTransform:transform];

-addFace:withTransform:函數

//獲取face視圖并將其添加到容器中
UIView *face = self.faces[index];
[self.containerView addSubview:face];

//將face視圖放在容器的中心
CGSize containerSize = self.containerView.bounds.size;
face.center = CGPointMake(containerSize.width / 2.0, containerSize.height / 2.0);

//添加transform
face.layer.transform = transform;

添加定時器和回調函數

初始化定時器，并設置定時回調

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

回調處理

//計算旋轉度數
self.angle = (self.angle + 5) % 360;

//將度數轉化為弧度
float deg = self.angle * (M_PI / 180);

// 初始化一個單元矩陣
CATransform3D temp = CATransform3DIdentity;

//將單元矩陣旋轉
temp = CATransform3DRotate(temp, deg, 0.3, 1, 0.7);

//旋轉容器的子layer
self.containerView.layer.sublayerTransform = temp;

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二十二案例：旋轉的立方體（GLKit+CoreAnimation)

二十二案例：旋轉的立方體（GLKit+CoreAnimation)

GLKit實現

效果圖

流程

具體步驟

1.準備工作

OpenGL ES相關初始化 commonInit函數

添加CADisplayLink定時器 addCADisplayLink

釋放資源 dealloc

GLKit實現旋轉的立方體完整代碼參考：github

CoreAnimation實現

效果圖

流程

具體步驟

準備工作

viewDidLoad

CoreAnimation實現旋轉的立方體完整代碼參考：github

三个男躁一个女,国精产品一区一手机的秘密,麦子交换系列最经典十句话,欧美 国产 综合 欧美 视频

二十二 案例：旋轉的立方體（GLKit+CoreAnimation)

GLKit實現

效果圖

流程

具體步驟

1.準備工作

OpenGL ES相關初始化 commonInit函數

添加CADisplayLink定時器 addCADisplayLink

釋放資源 dealloc

GLKit實現旋轉的立方體完整代碼參考：github

CoreAnimation實現

效果圖

流程

具體步驟

準備工作

viewDidLoad

CoreAnimation實現旋轉的立方體完整代碼參考：github

三个男躁一个女,国精产品一区一手机的秘密,麦子交换系列最经典十句话,欧美国产综合欧美视频

二十二案例：旋轉的立方體（GLKit+CoreAnimation)