SceneKit_大神02_弹幕来袭

酷走天涯

发布于 2022-05-13 16:15:54

4990

发布于 2022-05-13 16:15:54

文章被收录于专栏：每日一篇技术文章

SceneKit_中级01_模型之间的过渡动画

SceneKit_中级02_SCNView 详细讲解

SceneKit_中级03_切换照相机视角

SceneKit_高级02_粒子系统深入研究

SceneKit_高级03_自定义力

SceneKit_高级04_自定义场景过渡效果

SceneKit_高级05 检测手势点击到节点

SceneKit_高级06_加载顶点、纹理、法线坐标

SceneKit_高级07_SCNProgram用法探究

SceneKit_大神03_navigationbar上的3D文字

让学习成为一种习惯

上干货

创建工程

就是一个普通的应用

拖拽一个view放在界面上,把它的类改成SCNView

引用一下

添加框架

上一步，有红不要紧，因为你没有添加框架.

配置工程到此结束,简单吧

添加场景

self.scnView.backgroundColor = [UIColor blackColor];
self.scnView.scene = [SCNScene scene];

添加摄像头

SCNCamera *camera = [SCNCamera camera];
SCNNode *cameraNode = [SCNNode node];
cameraNode.camera = camera;
cameraNode.position = SCNVector3Make(0, 5, 10);
[self.scnView.scene.rootNode addChildNode:cameraNode];

添加聚光灯

SCNNode *lightNode = [SCNNode node];
lightNode.light = [SCNLight light];
lightNode.light.type = SCNLightTypeSpot;
lightNode.position = SCNVector3Make(0, 20, 20);
lightNode.rotation = SCNVector4Make(1, 0, 0, -M_PI/4);
[self.scnView.scene.rootNode addChildNode:lightNode];

创建定时器,随机产生弹幕节点

 NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(createTextNode) userInfo:nil repeats:true];

-(void)createTextNode{
// 创建字体
SCNText *text = [SCNText textWithString:@"我是弹幕" extrusionDepth:1];
text.firstMaterial.diffuse.contents = [UIColor colorWithRed:arc4random_uniform(255)/255.0 green:arc4random_uniform(255)/255.0  blue:arc4random_uniform(255)/255.0  alpha:1];
text.font = [UIFont systemFontOfSize:2];
text.firstMaterial.diffuse.contents = @"1.PNG";

//绑定到节点上
SCNNode *textNode =[SCNNode nodeWithGeometry:text];


// 随机节点位置
textNode.position = SCNVector3Make(-arc4random_uniform(30)+15, arc4random_uniform(20)+1, -100);

// 添加行为动画
SCNAction *moveAction = [SCNAction moveTo:SCNVector3Make(-2, 4, 10) duration:5];
SCNAction *removeFromSuper = [SCNAction removeFromParentNode];
SCNAction *customAction = [SCNAction sequence:@[moveAction,removeFromSuper]];

// 将节点添加到场景中去
[self.scnView.scene.rootNode addChildNode:textNode];
[textNode runAction:customAction];
}

运行效果: