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"];
