threejs 裁剪

设置渲染器中的localClippingEnabled为true,即

renderer.localClippingEnabled = true;//设置为可剪裁

对于模型的material，如

let material = new THREE.MeshLambertMaterial(
				{
						color: colorToHex(meshData.Color[0]),
						flatShading: THREE.SmoothShading,
						clippingPlanes: clipPlanes,//裁剪
				});

clipPlanes可以理解为裁剪面，当clipPlanes中的constant的值，在模型的包围盒的范围内时，则发生裁剪

var clipPlanes= [
  new THREE.Plane( new THREE.Vector3( 1, 0, 0 ), 100 ),
  new THREE.Plane( new THREE.Vector3( 0, 1, 0 ), 100 ),
	new THREE.Plane( new THREE.Vector3( 0, 0, 1 ), 100 ),
	
  new THREE.Plane( new THREE.Vector3( -1, 0, 0 ), 100 ),
  new THREE.Plane( new THREE.Vector3( 0, -1, 0 ), 100 ),
  new THREE.Plane( new THREE.Vector3( 0, 0, -1 ), 100 ),
];
function clip(type,value){
	clipPlanes.map((n,i)=>{
		if(i==type){
			n.constant=value
		}
		
	})
	//clipPlanes[ j ].constant = value;
}

效果：