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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

            
              <script src="https://threejs.org/build/three.js"></script>
<script src="https://threejs.org/examples/js/controls/OrbitControls.js"></script>
<script src="https://threejs.org/examples/js/libs/dat.gui.min.js"></script>
            
          
!

CSS

            
              body{
  margin: 0px;
  background: #000000;
}
            
          
!

JS

            
              var renderer, scene, camera, cameraH,sceneH, mainMaterial,mainMaterialShader, holeMaterial, holeMaterialShader, holeMaterialCube, holeMaterialCubeShader ,holeSphere, mainSphere,startTime, HelperMesh, curveObject;
var cubeMap = new THREE.CubeTextureLoader()
	.setPath( 'https://threejs.org/examples/textures/cube/Bridge2/' )
	.load( [
		'posx.jpg',
		'negx.jpg',
		'posy.jpg',
		'negy.jpg',
		'posz.jpg',
		'negz.jpg'
	] );
var materialParams = {
  color:0xffffff,
  transparent:true,
  roughness:0.7,
  metalness: 0.2,
  opacity:1.0,
  envMap:cubeMap,
}

var hSize = 10;

var params = {
  Cube: function(){
    console.log("its a cube!");
    if(mainSphere){
      mainSphere.geometry = new THREE.BoxGeometry( 20, 20, 20 );
    }
    if(holeSphere){
      holeSphere.material = holeMaterialCube;
    }
    
  },
  Sphere: function(){
    console.log("its a Sphere!")
    if(mainSphere){
      mainSphere.geometry = new THREE.SphereGeometry( 10, 100, 100 );
    }
    if(holeSphere){
      holeSphere.material = holeMaterial;
    }
  },
  size: hSize,
  showHelpers: true
}

var gui = new dat.GUI();
gui.add(params, 'Cube');
gui.add(params, 'Sphere');
gui.add(params, 'size', 1, 20).onFinishChange(function(value){
  console.log(HelperMesh);
  if(holeSphere){
    for(var i =0;i< holeSphere.geometry.vertices.length;i++){
      holeSphere.geometry.vertices[i].normalize().multiplyScalar(value);
    }
    holeSphere.geometry.verticesNeedUpdate = true;
    
    HelperMesh.geometry = new THREE.SphereBufferGeometry( value, 12, 12 );

    hSize = value;
  }
  
});
gui.add(params, 'showHelpers').onChange(function(value){
  HelperMesh.visible = value;
  curveObject.visible = value;
});
gui.open();

SetMainMaterial();
SetHoleMaterialCube();
SetHoleMaterial();

init();
animate();

function SetMainMaterial(){
  mainMaterial = new THREE.MeshStandardMaterial(materialParams);
  mainMaterial.onBeforeCompile = function ( shader ) {
    
    shader.vertexShader = shader.vertexShader.replace(
      '#include <uv_pars_vertex>',
      [
        '#include <uv_pars_vertex>',
        'varying vec3 localPosition;'
      ].join( '\n' )
    ).replace(
      '#include <uv_vertex>',
      [
        'localPosition = vec3(position);',
        '#include <uv_vertex>',
      ].join( '\n' )
    );
    
    shader.fragmentShader = shader.fragmentShader.replace(
      '#include <uv_pars_fragment>',
      [
        '#include <uv_pars_fragment>',
        'varying vec3 localPosition;',
        'uniform vec4 posSize1;',
      ].join( '\n' )
    ).replace(
      'gl_FragColor = vec4( outgoingLight, diffuseColor.a );',
      [
        'if(length(posSize1.xyz - localPosition) < posSize1.w * 0.99){',
        'diffuseColor.a = 0.0;',
        '}',
        'gl_FragColor = vec4( outgoingLight, diffuseColor.a );',
      ].join( '\n' )
    );
    shader.uniforms.posSize1 = {value: new THREE.Vector4(0,10,0,hSize)};
    
    mainMaterialShader = shader;
  }
}
function SetHoleMaterial(){
  holeMaterial = new THREE.MeshStandardMaterial(materialParams);
  holeMaterial.side = THREE.BackSide;
  holeMaterial.onBeforeCompile = function ( shader ) {
    
    shader.vertexShader = shader.vertexShader.replace(
      '#include <uv_pars_vertex>',
      [
        '#include <uv_pars_vertex>',
        'varying vec3 localPosition;'
      ].join( '\n' )
    ).replace(
      '#include <uv_vertex>',
      [
        'localPosition = vec3(position);',
        '#include <uv_vertex>',
      ].join( '\n' )
    );
    
    shader.fragmentShader = shader.fragmentShader.replace(
      '#include <uv_pars_fragment>',
      [
        '#include <uv_pars_fragment>',
        'varying vec3 localPosition;',
        'uniform vec4 posSize1;',
        'uniform float mainSize;',
      ].join( '\n' )
    ).replace(
      'gl_FragColor = vec4( outgoingLight, diffuseColor.a );',
      [
        'vec3 hPos = vec3(0.0,10.0,0.0);',
        'if(length(posSize1.xyz + localPosition) > 10.0){',
        'diffuseColor.a = 0.0;',
        '}',
        'gl_FragColor = vec4( outgoingLight, diffuseColor.a );',
      ].join( '\n' )
    );
    
    shader.uniforms.mainSize = {value: 10}
    shader.uniforms.posSize1 = {value: new THREE.Vector4(0,10,0,hSize)}
    
    
    holeMaterialShader = shader;
  }
}
function SetHoleMaterialCube(){
  holeMaterialCube = new THREE.MeshStandardMaterial(materialParams);
  holeMaterialCube.side = THREE.BackSide;
  holeMaterialCube.onBeforeCompile = function ( shader ) {
    
    shader.vertexShader = shader.vertexShader.replace(
      '#include <uv_pars_vertex>',
      [
        '#include <uv_pars_vertex>',
        'varying vec3 localPosition;'
      ].join( '\n' )
    ).replace(
      '#include <uv_vertex>',
      [
        'localPosition = vec3(position);',
        '#include <uv_vertex>',
      ].join( '\n' )
    );
    
    shader.fragmentShader = shader.fragmentShader.replace(
      '#include <uv_pars_fragment>',
      [
        '#include <uv_pars_fragment>',
        'varying vec3 localPosition;',
        'uniform vec4 posSize1;',
        'uniform float mainSize;',
      ].join( '\n' )
    ).replace(
      'gl_FragColor = vec4( outgoingLight, diffuseColor.a );',
      [
        'vec3 hPos = posSize1.xyz + localPosition;',
        'if(hPos.x > 10.0 || hPos.x < -10.0 || hPos.y > 10.0 || hPos.y < -10.0 || hPos.z > 10.0 || hPos.z < -10.0){',
        'diffuseColor.a = 0.0;',
        '}',
        'gl_FragColor = vec4( outgoingLight, diffuseColor.a );',
      ].join( '\n' )
    );
    
    shader.uniforms.mainSize = {value: 10}
    shader.uniforms.posSize1 = {value: new THREE.Vector4(0,10,0,hSize)}
    
    
    holeMaterialCubeShader = shader;
  }
}
function init(){
  
  renderer = new THREE.WebGLRenderer({alpha:true, antialias:true});
  renderer.setSize( window.innerWidth, window.innerHeight );
  renderer.autoClear = false;
  document.body.appendChild( renderer.domElement );
  
  scene = new THREE.Scene();
  sceneH = new THREE.Scene();
  camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 10000 );
  camera.position.set(40, 20, -40);
  cameraH = camera.clone();
  var ambientLight = new THREE.AmbientLight( 0x404040 );
  var light = new THREE.PointLight( 0xffffff, 0.3, 1000 );
  camera.add(light);
  cameraH.add(light.clone());
  // controls
  controls = new THREE.OrbitControls( camera );
  var controlsH = new THREE.OrbitControls( cameraH );
  
  var path = new THREE.Path();
  curve = new THREE.CatmullRomCurve3( [
    new THREE.Vector3( -10,0,-12 ),
    new THREE.Vector3( 5,-4,0),
    new THREE.Vector3( -10,0,10),
    new THREE.Vector3( -8,3,0),

  ] );
  curve.closed = true;
  var points = curve.getPoints( 150 );
  var geometry = new THREE.BufferGeometry().setFromPoints( points );

  var material = new THREE.LineBasicMaterial( { color : 0xff0000 } );

  curveObject = new THREE.Line( geometry, material );

  //var mainSphereGeo = new THREE.SphereGeometry( 10, 100, 100 );
  var mainSphereGeo = new THREE.BoxGeometry( 20, 20, 20 );
  var holeSphereGeo = new THREE.SphereGeometry( hSize, 30, 30 );
  
  var HelperGeo = new THREE.SphereGeometry(hSize, 12, 12);
  var HelperWireframe = new THREE.WireframeGeometry(HelperGeo);
  HelperMesh = new THREE.LineSegments( HelperWireframe );
  HelperMesh.material.depthTest = false;
  HelperMesh.material.opacity = 0.5;
  HelperMesh.material.transparent = true;
  mainSphere = new THREE.Mesh(mainSphereGeo, mainMaterial);
  holeSphere = new THREE.Mesh(holeSphereGeo, holeMaterialCube);
  holeSphere.position.set(0,10,0);
  
  holeSphere.add(HelperMesh);
  
  scene.add(camera,mainSphere,curveObject);//, ambientLight
  sceneH.add(cameraH,holeSphere);//,ambientLight.clone()
  
  startTime = new Date().getTime();
}

function animate(){
  requestAnimationFrame( animate );
  
  var time = (new Date().getTime() - startTime)/8000;

  var alpha = -(Math.floor(time) - time);
  curve.getPoint( alpha, holeSphere.position );
  var posSize1 = new THREE.Vector4(holeSphere.position.x, holeSphere.position.y, holeSphere.position.z, hSize);
  if(mainMaterialShader){
    mainMaterialShader.uniforms.posSize1.value.copy(posSize1);
  }
  if(holeMaterialShader){
    holeMaterialShader.uniforms.posSize1.value.copy(posSize1);
  }
  if(holeMaterialCubeShader){
    holeMaterialCubeShader.uniforms.posSize1.value.copy(posSize1);
  }
  renderer.render(sceneH, cameraH);
  renderer.clearDepth();
  renderer.render( scene, camera );
}
            
          
!
999px

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