地图不适用于加载的Obj

时间：2018-01-11 17:19:51

标签： three.js

这是我之前提出的问题here。我只想尝试在这个obj的每一侧应用不同的纹理，但什么都没有出现。没有控制台错误，我相信我正在以正确的顺序应用事物。

这应该很简单，但过去一小时我一直在努力。这是以下代码示例：

＆＃13;
＆＃13; 
(function onLoad() {
  var canvasElement;
  var width, height;
  var scene, camera;
  var renderer;
  var controls;

  var pivot;
  var bagMesh;
  var planeMesh;
  
  const objLoader = new THREE.OBJLoader2();
  const fileLoader = new THREE.FileLoader();
  const textureLoader = new THREE.TextureLoader();
 
  init();

  function init() {
    container = document.getElementById('container');
    initScene();
    addGridHelper();
    addCamera();
    addLighting();
    addRenderer();
    addOrbitControls();

    loadPlaneObj();
    
    // Logic
		var update = function() {};

		// Draw scene
		var render = function() {
			renderer.render(scene, camera);
		};

		// Run game logic (update, render, repeat)
		var gameLoop = function() {
			requestAnimationFrame(gameLoop);
			update();
			render();
		};
		gameLoop();
  }

  /**** Basic Scene Setup ****/
  function initScene() {
    scene = new THREE.Scene();
    scene.background = new THREE.Color(0xd3d3d3);
    var axis = new THREE.AxesHelper();
    scene.add(axis);
  }

  function addCamera() {
    camera = new THREE.PerspectiveCamera(70, window.innerWidth / window.innerHeight, 1, 1000);
    camera.position.set(3,3,3);
    scene.add(camera);
  }

  function addGridHelper() {
    var planeGeometry = new THREE.PlaneGeometry(2000, 2000);
    planeGeometry.rotateX(-Math.PI / 2);

    var planeMaterial = new THREE.ShadowMaterial({
      opacity: 0.2
    });
    var plane = new THREE.Mesh(planeGeometry, planeMaterial);
    plane.position.y = -200;
    plane.receiveShadow = true;
    scene.add(plane);

    var helper = new THREE.GridHelper(2000, 100);
    helper.material.opacity = 0.25;
    helper.material.transparent = true;
    scene.add(helper);

    var axis = new THREE.AxesHelper();
    scene.add(axis);
  }

  // *********** Lighting settings **********************
  function addLighting() {
    var light = new THREE.HemisphereLight(0xffffff, 0xffffff, 1);
    scene.add(light);
  }

  // ************** Material settings **************
  function setMaterial(materialName) {
    // get the object from the scene
    var bagMesh = scene.getObjectByName('bag');
    var material;

    if (!materialName) {
      materialName = materials.material;
    }

    if (bagMesh) {
      var colour = parseInt(materials.colour);
      switch (materialName) {
        case 'MeshBasicMaterial':
          material = new THREE.MeshBasicMaterial({
            color: colour
          });
          break;
        case 'MeshDepthMaterial':
          material = new THREE.MeshDepthMaterial();
          break;
        case 'MeshLambertMaterial':
          material = new THREE.MeshLambertMaterial({
            color: colour
          });
          break;
        case 'MeshNormalMaterial':
          material = new THREE.MeshNormalMaterial();
          break;
        case 'MeshPhongMaterial':
          material = new THREE.MeshPhongMaterial({
            color: colour
          });
          break;
        case 'MeshPhysicalMaterial':
          material = new THREE.MeshPhysicalMaterial({
            color: colour
          });
          break;
        case 'MeshStandardMaterial':
          material = new THREE.MeshStandardMaterial({
            color: colour
          });
          break;
        case 'MeshToonMaterial':
          material = new THREE.MeshToonMaterial({
            color: colour
          });
          break;
      }
      bagMesh.children.forEach(function(c) {
        c.material = material;
      });
    }
  }

  function setMaterialColour(colour) {
    materials.colour = colour;
    setMaterial(null);
  }
  // ************** End of materials ***************

  function addRenderer() {
    renderer = new THREE.WebGLRenderer({
      antialias: true
    });
    renderer.setPixelRatio(window.devicePixelRatio);
    renderer.setSize(window.innerWidth, window.innerHeight);
    renderer.shadowMap.enabled = true;
    container.appendChild(renderer.domElement);
  }

  function addOrbitControls() {
    var controls = new THREE.OrbitControls(camera, renderer.domElement);
  }

  function addPivot() {
    var cubeGeo = new THREE.BoxBufferGeometry(5, 5, 5);
    var cubeMat = new THREE.MeshBasicMaterial();
    pivot = new THREE.Mesh(cubeGeo, cubeMat);
    bagMesh.position.x -= 15;
    bagMesh.position.z -= 55;

    pivot.add(bagMesh);
    pivot.add(handle);
    scene.add(pivot);
  }
  
  function loadPlaneObj() {
		loadObjWithMtl('PlaneWithMaterial', 
      'https://rawgit.com/Katana24/threejs-experimentation/material-test/models/PlaneWithMaterial.obj', 
      'https://rawgit.com/Katana24/threejs-experimentation/material-test/models/PlaneWithMaterial.mtl')
			.then(function(mesh) {
        loadTexture(
          'https://rawgit.com/Katana24/threejs-experimentation/material-test/img/1.jpg', scene, 0xff0000, THREE.FrontSide, mesh);
			});
	}
  
  function loadObjWithMtl(modelName, modelUrl, mtlUrl) {
		return new Promise(function(resolve, reject) {
			var callbackOnLoad = function ( event ) { resolve(event.detail.loaderRootNode); };
			var onLoadMtl = function ( materials ) {
				objLoader.setModelName( modelName );
				objLoader.setMaterials( materials );
				objLoader.getLogger().setDebug( true );
				objLoader.load( modelUrl, callbackOnLoad, null, null, null, false );
			};
			objLoader.loadMtl(mtlUrl, null, onLoadMtl );
		});
	}

	function loadTexture(imgPath, scene, color, side, mesh) {
		var loadedMesh = mesh;
	  textureLoader.load(imgPath,
			function (texture) {	
        var geometry = new THREE.Geometry().fromBufferGeometry( loadedMesh.children[0].geometry );
				mesh.children[0].material.map = texture;
				mesh.children[0].material.needsUpdate = true;
				scene.add(mesh);
			},
			undefined,
			function ( err ) {
				console.error( 'An error occurred...' );
			}
		);
	}
  
  function addPlaneToSceneSOAnswer(mesh) {
		var frontMaterial = new THREE.MeshBasicMaterial( { color : 0xff0000, side: THREE.FrontSide } );
		var backMaterial 	= new THREE.MeshBasicMaterial( { color : 0x00ff00, side: THREE.BackSide } );
		
		var geometry = new THREE.Geometry().fromBufferGeometry( mesh.children[0].geometry );
		var length = geometry.faces.length;
		geometry.faces.splice(14, 1);

		for (var i = 0; i < geometry.faces.length; i ++ ) {
			var face = geometry.faces[i];
			face.color.setHex(Math.random() * 0xffffff);
		}
		mesh = new THREE.Mesh( geometry, new THREE.MeshBasicMaterial({ vertexColors: THREE.FaceColors, side: THREE.DoubleSide }) );
		mesh.material.side = THREE.FrontSide; 
		
		var mesh2 = new THREE.Mesh( geometry, mesh.material.clone() ); 
		mesh2.material.side = THREE.BackSide; 
		// mesh2.material.vertexColors = THREE.NoColors; 
		mesh2.material.vertexColors = [new THREE.Color(0xff0000), new THREE.Color(0x00ff00), new THREE.Color(0x0000ff)];

		mesh.add( mesh2 );
		scene.add(mesh);
	}
})();
＆＃13; 
body {
  background: transparent;
  padding: 0;
  margin: 0;
  font-family: sans-serif;
}

#canvas {
  margin: 10px auto;
  width: 800px;
  height: 350px;
  margin-top: -44px;
}
＆＃13; 
<body>
  <div id="container"></div>
  <script src="https://threejs.org/build/three.js"></script>
  <script src="https://threejs.org/examples/js/libs/dat.gui.min.js"></script>
  <script src="https://threejs.org/examples/js/controls/OrbitControls.js"></script>
  <script src="https://threejs.org/examples/js/loaders/MTLLoader.js"></script>
  <script src="https://rawgit.com/mrdoob/three.js/dev/examples/js/loaders/LoaderSupport.js"></script>
  <script src="https://rawgit.com/mrdoob/three.js/dev/examples/js/loaders/OBJLoader2.js"></script>
</body>
＆＃13;
＆＃13;
＆＃13;

那么我在这里做错了多么简单？我认为问题在于这个功能：

  function loadTexture(imgPath, scene, color, side, mesh) {
    var loadedMesh = mesh;
    textureLoader.load(imgPath,
      function (texture) {  
        var geometry = new THREE.Geometry().fromBufferGeometry( loadedMesh.children[0].geometry );
        mesh.children[0].material.map = texture;
        mesh.children[0].material.needsUpdate = true;
        scene.add(mesh);
      },
      undefined,
      function ( err ) {
        console.error( 'An error occurred...' );
      }
    );
  }

此函数获取网格，然后加载所需的纹理并将其应用于网格中的材质。然后它告诉材料更新。这是正确的方法吗？

这个答案here实际上只有在设置了所有内容后才调用渲染但我希望能够在运行时更改纹理，材质等。

我认为mesh.children[0].material.needsUpdate = true会指示着色器程序更新......

由于

1 个答案:

答案 0 :(得分：1)

纹理正确加载，但未正确显示，因为blender对象不提供任何纹理坐标：

# Blender v2.77 (sub 0) OBJ File: 'Plane.blend'
# www.blender.org
mtllib PlaneWithMaterial.mtl
o Plane
v -1.000000 0.000000 1.000000
v 1.000000 0.000000 1.000000
v -1.000000 0.000000 -1.000000
v 1.000000 0.000000 -1.000000
vn 0.0000 1.0000 0.0000
usemtl Material
s off
f 1//1 2//1 4//1 3//1

请改用以下对象：

# Blender v2.77 (sub 0) OBJ File: 'Plane.blend'
# www.blender.org
mtllib PlaneWithMaterial.mtl
o Plane

v -1.000000 0.000000 1.000000
v 1.000000 0.000000 1.000000
v -1.000000 0.000000 -1.000000
v 1.000000 0.000000 -1.000000

vt 0.000000 0.000000
vt 1.000000 0.000000
vt 0.000000 1.000000
vt 1.000000 1.000000

vn 0.0000 1.0000 0.0000

usemtl Material
s off
f 1/1/1 2/2/1 4/4/1 3/3/1

请参阅代码段：

(function onLoad() {
  var canvasElement;
  var width, height;
  var scene, camera;
  var renderer;
  var controls;

  var pivot;
  var bagMesh;
  var planeMesh;
  
  const objLoader = new THREE.OBJLoader2();
  const fileLoader = new THREE.FileLoader();
  const textureLoader = new THREE.TextureLoader();
  textureLoader.setCrossOrigin("");
 
  init();

  function init() {
    container = document.getElementById('container');
    initScene();
    addGridHelper();
    addCamera();
    addLighting();
    addRenderer();
    addOrbitControls();

    loadPlaneObj();
    
    // Logic
		var update = function() {};

		// Draw scene
		var render = function() {
			renderer.render(scene, camera);
		};
    
    function resize() {
      var aspect = window.innerWidth / window.innerHeight;
      renderer.setSize(window.innerWidth, window.innerHeight);
      camera.aspect = aspect;
      camera.updateProjectionMatrix();
    }
    window.onresize = resize;

		// Run game logic (update, render, repeat)
		var gameLoop = function() {
			requestAnimationFrame(gameLoop);
			update();
			render();
		};
		gameLoop();
  }

  /**** Basic Scene Setup ****/
  function initScene() {
    scene = new THREE.Scene();
    scene.background = new THREE.Color(0xd3d3d3);
    var axis = new THREE.AxesHelper();
    scene.add(axis);
  }

  function addCamera() {
    camera = new THREE.PerspectiveCamera(70, window.innerWidth / window.innerHeight, 1, 1000);
    camera.position.set(1,1,1);
    scene.add(camera);
  }

  function addGridHelper() {
    var planeGeometry = new THREE.PlaneGeometry(2000, 2000);
    planeGeometry.rotateX(-Math.PI / 2);

    var planeMaterial = new THREE.ShadowMaterial({
      opacity: 0.2
    });
    var plane = new THREE.Mesh(planeGeometry, planeMaterial);
    plane.position.y = -200;
    plane.receiveShadow = true;
    scene.add(plane);

    var helper = new THREE.GridHelper(2000, 100);
    helper.material.opacity = 0.25;
    helper.material.transparent = true;
    scene.add(helper);

    var axis = new THREE.AxesHelper();
    scene.add(axis);
  }

  // *********** Lighting settings **********************
  function addLighting() {
    var light = new THREE.HemisphereLight(0xffffff, 0xffffff, 1);
    scene.add(light);
  }

  // ************** Material settings **************
  function setMaterial(materialName) {
    // get the object from the scene
    var bagMesh = scene.getObjectByName('bag');
    var material;

    if (!materialName) {
      materialName = materials.material;
    }

    if (bagMesh) {
      var colour = parseInt(materials.colour);
      switch (materialName) {
        case 'MeshBasicMaterial':
          material = new THREE.MeshBasicMaterial({
            color: colour
          });
          break;
        case 'MeshDepthMaterial':
          material = new THREE.MeshDepthMaterial();
          break;
        case 'MeshLambertMaterial':
          material = new THREE.MeshLambertMaterial({
            color: colour
          });
          break;
        case 'MeshNormalMaterial':
          material = new THREE.MeshNormalMaterial();
          break;
        case 'MeshPhongMaterial':
          material = new THREE.MeshPhongMaterial({
            color: colour
          });
          break;
        case 'MeshPhysicalMaterial':
          material = new THREE.MeshPhysicalMaterial({
            color: colour
          });
          break;
        case 'MeshStandardMaterial':
          material = new THREE.MeshStandardMaterial({
            color: colour
          });
          break;
        case 'MeshToonMaterial':
          material = new THREE.MeshToonMaterial({
            color: colour
          });
          break;
      }
      bagMesh.children.forEach(function(c) {
        c.material = material;
      });
    }
  }

  function setMaterialColour(colour) {
    materials.colour = colour;
    setMaterial(null);
  }
  // ************** End of materials ***************

  function addRenderer() {
    renderer = new THREE.WebGLRenderer({
      antialias: true
    });
    renderer.setPixelRatio(window.devicePixelRatio);
    renderer.setSize(window.innerWidth, window.innerHeight);
    renderer.shadowMap.enabled = true;
    container.appendChild(renderer.domElement);
  }

  function addOrbitControls() {
    var controls = new THREE.OrbitControls(camera, renderer.domElement);
  }

  function addPivot() {
    var cubeGeo = new THREE.BoxBufferGeometry(5, 5, 5);
    var cubeMat = new THREE.MeshBasicMaterial();
    pivot = new THREE.Mesh(cubeGeo, cubeMat);
    bagMesh.position.x -= 15;
    bagMesh.position.z -= 55;

    pivot.add(bagMesh);
    pivot.add(handle);
    scene.add(pivot);
  }
  
  function loadPlaneObj() {
    makeTextFile = function (text) {
      var data = new Blob([text], {type: 'text/plain'});
      var textFile = window.URL.createObjectURL(data);
      return textFile;   
    }
    var textbox_obj = document.getElementById('plane_obj');
    var obj_url = makeTextFile(textbox_obj.value);
    var textbox_mtl = document.getElementById('plane_mtl');
    var mtl_url = makeTextFile(textbox_mtl.value);

    loadObjWithMtl('plane1', 
      obj_url, mtl_url)
			.then(function(mesh) {
        loadTexture(
         'https://rawgit.com/Katana24/threejs-experimentation/material-test/img/1.jpg',
         scene, 0xff0000, THREE.FrontSide, mesh);
			});
	}
  
  function loadObjWithMtl(modelName, modelUrl, mtlUrl) {
		return new Promise(function(resolve, reject) {
			var callbackOnLoad = function ( event ) { resolve(event.detail.loaderRootNode); };
			var onLoadMtl = function ( materials ) {
				objLoader.setModelName( modelName );
				objLoader.setMaterials( materials );
				objLoader.getLogger().setDebug( true );
				objLoader.load( modelUrl, callbackOnLoad, null, null, null, false );
			};
			objLoader.loadMtl(mtlUrl, null, onLoadMtl );
		});
	}

	function loadTexture(imgPath, scene, color, side, mesh) {
		var loadedMesh = mesh;
	  textureLoader.load(imgPath,
			function (texture) {	
        var geometry = new THREE.Geometry().fromBufferGeometry( loadedMesh.children[0].geometry );
				mesh.children[0].material.map = texture;
				mesh.children[0].material.needsUpdate = true;
				scene.add(mesh);
			},
			undefined,
			function ( err ) {
				console.error( 'An error occurred...' );
			}
		);
	}
  
  function addPlaneToSceneSOAnswer(mesh) {
		var frontMaterial = new THREE.MeshBasicMaterial( { color : 0xff0000, side: THREE.FrontSide } );
		var backMaterial 	= new THREE.MeshBasicMaterial( { color : 0x00ff00, side: THREE.BackSide } );
		
		var geometry = new THREE.Geometry().fromBufferGeometry( mesh.children[0].geometry );
		var length = geometry.faces.length;
		geometry.faces.splice(14, 1);

		for (var i = 0; i < geometry.faces.length; i ++ ) {
			var face = geometry.faces[i];
			face.color.setHex(Math.random() * 0xffffff);
		}
		mesh = new THREE.Mesh( geometry, new THREE.MeshBasicMaterial({ vertexColors: THREE.FaceColors, side: THREE.DoubleSide }) );
		mesh.material.side = THREE.FrontSide; 
		
		var mesh2 = new THREE.Mesh( geometry, mesh.material.clone() ); 
		mesh2.material.side = THREE.BackSide; 
		// mesh2.material.vertexColors = THREE.NoColors; 
		mesh2.material.vertexColors = [new THREE.Color(0xff0000), new THREE.Color(0x00ff00), new THREE.Color(0x0000ff)];

		mesh.add( mesh2 );
		scene.add(mesh);
	}
})();
body {
  background: transparent;
  padding: 0;
  margin: 0;
  font-family: sans-serif;
}

#canvas {
  margin: 10px auto;
  width: 800px;
  height: 350px;
  margin-top: -44px;
}
<body>
  <div id="container"></div>
  <script src="https://threejs.org/build/three.js"></script>
  <script src="https://threejs.org/examples/js/libs/dat.gui.min.js"></script>
  <script src="https://threejs.org/examples/js/controls/OrbitControls.js"></script>
  <script src="https://threejs.org/examples/js/loaders/MTLLoader.js"></script>
  <script src="https://rawgit.com/mrdoob/three.js/dev/examples/js/loaders/LoaderSupport.js"></script>
  <script src="https://rawgit.com/mrdoob/three.js/dev/examples/js/loaders/OBJLoader2.js"></script>

  <textarea id="plane_obj" style="display:none;">
    # Blender v2.77 (sub 0) OBJ File: 'Plane.blend'
    # www.blender.org
    mtllib Plane.mtl
    o Plane
    
    v -1.000000 0.000000 1.000000
    v 1.000000 0.000000 1.000000
    v -1.000000 0.000000 -1.000000
    v 1.000000 0.000000 -1.000000
    
    vt 0.000000 0.000000
    vt 1.000000 0.000000
    vt 0.000000 1.000000
    vt 1.000000 1.000000
    
    vn 0.0000 1.0000 0.0000
    
    usemtl None
    s off
    f 1/1/1 2/2/1 4/4/1 3/3/1
  </textarea>

  <textarea id="plane_mtl" style="display:none;">
    # Blender MTL File: 'Plane.blend'
    # Material Count: 1
    
    newmtl None
    Ns 0
    Ka 0.000000 0.000000 0.000000
    Kd 0.8 0.8 0.8
    Ks 0.8 0.8 0.8
    d 1
    illum 2
  </textarea>

</body>

相关问题
最新问题