SCNGeometry几何体类型
1.SCNBox 立方体
代码：（下面只介绍几何体创建）
//盒子
SCNBox *box = [SCNBox boxWithWidth:10 height:10 length:10 chamferRadius:0];
//材质（贴图后面章节说贴图）
? ? SCNMaterial *allMaterial1 = [SCNMaterial new];
? ? allMaterial1.diffuse.contents =[UIImage imageNamed:@"1"];
? ? SCNMaterial *allMaterial2 = [SCNMaterial new];
? ? allMaterial2.diffuse.contents =[UIImage imageNamed:@"2"];
? ? SCNMaterial *allMaterial3 = [SCNMaterial new];
? ? allMaterial3.diffuse.contents =[UIImage imageNamed:@"3"];
? ? SCNMaterial *allMaterial4 = [SCNMaterial new];
? ? allMaterial4.diffuse.contents =[UIImage imageNamed:@"4"];
? ? SCNMaterial *allMaterial5 = [SCNMaterial new];
? ? allMaterial5.diffuse.contents =[UIImage imageNamed:@"5"];
? ? SCNMaterial *allMaterial6 = [SCNMaterial new];
? ? allMaterial6.diffuse.contents =[UIImage imageNamed:@"6"];
//贴图位置
? ? NSArray *array = @[allMaterial1,allMaterial2,allMaterial3,allMaterial4,allMaterial5,allMaterial6];
//? ? @[front,right,back,left,top,bottom];
? ? box.materials = array;
//立方体放node
? ? SCNNode *boxNode = [SCNNode nodeWithGeometry:box];
? ? boxNode.position = SCNVector3Make(0, 0, -50);
? ? [self.scnView.scene.rootNode addChildNode:boxNode];
//动画（为更好的体现立体，下一节介绍动画效果）
? ? SCNAction *action = [SCNAction rotateByAngle:10 aroundAxis:SCNVector3Make(0, 1, 0) duration:6];
? ? SCNAction *action1 = [SCNAction rotateByAngle:10 aroundAxis:SCNVector3Make(1, 0, 0) duration:4];
? ? [boxNode runAction:[SCNAction group:@[[SCNAction repeatActionForever:action],[SCNAction repeatActionForever:action1]]]];
2.SCNPlane 平面
????SCNPlane *Plane = [SCNPlane planeWithWidth:10 height:10];
3.SCNPyramid 锥形（金字塔）
????SCNPyramid *Pyramid = [SCNPyramid pyramidWithWidth:10 height:10 length:10];
4.SCNSphere?球体
SCNSphere *Cylinder = [SCNSphere sphereWithRadius:10];
5.SCNCylinder?圆柱
????SCNCylinder *Cylinder = [SCNCylinder cylinderWithRadius:10 height:10];
6.SCNCone?圆锥体
????SCNCone *Cylinder = [SCNCone coneWithTopRadius:10 bottomRadius:6 height:10];
7.SCNTube 圆柱管道
????SCNTube *Cylinder = [SCNTube tubeWithInnerRadius:8 outerRadius:10 height:10];
8.SCNCapsule?胶囊
SCNCapsule *Cylinder = [SCNCapsule capsuleWithCapRadius:1 height:10];
9.SCNTorus?圆环面
SCNTorus *Cylinder = [SCNTorus torusWithRingRadius:10 pipeRadius:3];
10.SCNFloor 地板
????SCNFloor *Cylinder = [SCNFloor floor];
? ? Cylinder.firstMaterial.diffuse.contents =[UIImage imageNamed:@"1"];
? ? SCNNode *CylinderNode = [SCNNode nodeWithGeometry:Cylinder];
? ? CylinderNode.position = SCNVector3Make(0, -5, 0);
? ? [self.scnView.scene.rootNode addChildNode:CylinderNode];
11.SCNText 字体
SCNText *Cylinder = [SCNText textWithString:@"海贼王" extrusionDepth:10];
12.SCNShape 自定义几何体
//路径 （单位为1m）
? ? ?UIBezierPath *path=[UIBezierPath bezierPath];
? ? [path moveToPoint:CGPointMake(0, 5)];
? ? [path addLineToPoint:CGPointMake(5, 0)];
? ? [path addLineToPoint:CGPointMake(10, 2.5)];
? ? [path addLineToPoint:CGPointMake(10, 7.5)];
? ? [path addLineToPoint:CGPointMake(5, 10)];
? ? [path addLineToPoint:CGPointMake(0, 5)];
//添加路径
? ? SCNShape *Cylinder = [SCNShape shapeWithPath:path extrusionDepth:6];
? ? Cylinder.chamferMode =SCNChamferModeBoth;
? ? Cylinder.firstMaterial.diffuse.contents =[UIImage imageNamed:@"1"];
