BabylonJS - 漫反射

更新于 2025/2/22 9:52:17

Diffuse 漫反射属性将颜色扩散到其所连接的整个网格上。

示例

请考虑以下示例以了解其工作原理。

语法

materialforbox.diffuseColor = new BABYLON.Color3(1.0, 0.2, 0.7);

演示

<!doctype html>
<html>
   <head>
      <meta charset = "utf-8">
      <title>BabylonJs - Basic Element-Creating Scene</title>
      <script src = "babylon.js"></script>
      <style>
         canvas {width: 100%; height: 100%;}
      </style>
   </head>

   <body>
      <canvas id = "renderCanvas"></canvas>
      <script type = "text/javascript">
         var canvas = document.getElementById("renderCanvas");
         var engine = new BABYLON.Engine(canvas, true);
         var createScene  = function() {
            var scene = new BABYLON.Scene(engine);
            scene.clearColor = new BABYLON.Color3(0, 1, 0);
            
            var camera = new BABYLON.ArcRotateCamera("Camera", 1, 0.8, 10, new BABYLON.Vector3(0, 0, 0), scene);
            camera.attachControl(canvas, true);
            
            var light = new BABYLON.HemisphericLight("light1", new BABYLON.Vector3(0, 1, 0), scene);
            light.intensity = 0.7;	
           
            var materialforbox = new BABYLON.StandardMaterial("texture1", scene);
            
            var box = BABYLON.Mesh.CreateBox("box", '3', scene);	
            box.material  = materialforbox;
            materialforbox.diffuseColor = new BABYLON.Color3(1.0, 0.7, 0.3); // color is applied to he box
            return scene;
         };
         var scene = createScene();
         engine.runRenderLoop(function() {
            scene.render();
         });
      </script>
   </body>
</html>

输出

使用标准材质，您可以将颜色应用于其所附着的形状。

带纹理的演示

纹理是使用图像创建的。

<!doctype html>
<html>
   <head>
      <meta charset = "utf-8">
      <title>BabylonJs - Basic Element-Creating Scene</title>
      <script src = "babylon.js"></script>
      <style>
         canvas {width: 100%; height: 100%;}
      </style>
   </head>

   <body>
      <canvas id = "renderCanvas"></canvas>
      <script type = "text/javascript">
         var canvas = document.getElementById("renderCanvas");
         var engine = new BABYLON.Engine(canvas, true);
         var createScene  = function() {
            var scene = new BABYLON.Scene(engine);
            scene.clearColor = new BABYLON.Color3(0, 1, 0);
            
            var camera = new BABYLON.ArcRotateCamera("Camera", 1, 0.8, 10, new BABYLON.Vector3(0, 0, 0), scene);
            camera.attachControl(canvas, true);
            
            var light = new BABYLON.HemisphericLight("light1", new BABYLON.Vector3(0, 1, 0), scene);
            light.intensity = 0.7;	
            
            var materialforbox = new BABYLON.StandardMaterial("texture1", scene);
            
            var box = BABYLON.Mesh.CreateBox("box", '3', scene);	
            box.material  = materialforbox;
            materialforbox.diffuseTexture = new BABYLON.Texture("images/nature.jpg", scene);
            return scene;
         };
         var scene = createScene();
         engine.runRenderLoop(function() {
            scene.render();
         });
      </script>
   </body>
</html>

输出

上述代码行生成以下输出 −

在此演示中，我们使用了一个名为 nature.jpg 的图像。图像存储在本地 images/ 文件夹中，也粘贴在下面以供参考。您可以下载您选择的任何图像并在演示链接中使用。

我们已将以下图像用于框 − images/nature.jpg

使用偏移进行漫反射

现在让我们看看如何使用偏移进行漫反射。

语法

materialforbox.diffuseTexture.uOffset = 0.5;
materialforbox.diffuseTexture.vOffset = 0.5;

U 和 v 指的是 x 和 y 轴 −

<!doctype html>
<html>
   <head>
      <meta charset = "utf-8">
      <title>BabylonJs - Basic Element-Creating Scene</title>
      <script src = "babylon.js"></script>
      <style>
         canvas {width: 100%; height: 100%;}
      </style>
   </head>

   <body>
      <canvas id = "renderCanvas"></canvas>
      <script type = "text/javascript">
         var canvas = document.getElementById("renderCanvas");
         var engine = new BABYLON.Engine(canvas, true);
         
         var createScene  = function() {
            var scene = new BABYLON.Scene(engine);
            scene.clearColor = new BABYLON.Color3(0, 1, 0);
            var camera = new BABYLON.ArcRotateCamera("Camera", 1, 0.8, 10, new BABYLON.Vector3(0, 0, 0), scene);
            camera.attachControl(canvas, true);
            
            var light = new BABYLON.HemisphericLight("light1", new BABYLON.Vector3(0, 1, 0), scene);
            light.intensity = 0.7;	
            
            var materialforbox = new BABYLON.StandardMaterial("texture1", scene);
            
            var box = BABYLON.Mesh.CreateBox("box", '3', scene);	
            box.material  = materialforbox;
            materialforbox.diffuseTexture = new BABYLON.Texture("images/nature.jpg", scene);

            materialforbox.diffuseTexture.uOffset = 0.5;
            materialforbox.diffuseTexture.vOffset = 0.5;

            return scene;
         };
         var scene = createScene();
         engine.runRenderLoop(function() {
            scene.render();
         });
      </script>
   </body>
</html>

输出

上述代码行生成以下输出 −

在此演示中，我们使用了一个名为 nature.jpg 的图像。图像存储在本地的 images/ 文件夹中。在这里，我们使用了与上一个演示中相同的图像。该图像已粘贴在上面以供参考。您可以下载您选择的任何图像并在演示链接中使用。

带缩放的漫射

现在让我们看看如何带缩放的漫射。

语法

materialforbox.diffuseTexture.uScale = 5.0;
materialforbox.diffuseTexture.vScale = 5.0;

演示

<!doctype html>
<html>
   <head>
      <meta charset = "utf-8">
      <title>BabylonJs - Basic Element-Creating Scene</title>
      <script src = "babylon.js"></script>
      <style>
         canvas {width: 100%; height: 100%;}
      </style>
   </head>

   <body>
      <canvas id = "renderCanvas"></canvas>
      <script type = "text/javascript">
         var canvas = document.getElementById("renderCanvas");
         var engine = new BABYLON.Engine(canvas, true);
         var createScene  = function() {
            var scene = new BABYLON.Scene(engine);
            scene.clearColor = new BABYLON.Color3(0, 1, 0);
         
            var camera = new BABYLON.ArcRotateCamera("Camera", 1, 0.8, 10, new BABYLON.Vector3(0, 0, 0), scene);
            camera.attachControl(canvas, true);
         
            var light = new BABYLON.HemisphericLight("light1", new BABYLON.Vector3(0, 1, 0), scene);
            light.intensity = 0.7;	
         
            var materialforbox = new BABYLON.StandardMaterial("texture1", scene);
            var box = BABYLON.Mesh.CreateBox("box", '3', scene);	
            box.material  = materialforbox;
            materialforbox.diffuseTexture = new BABYLON.Texture("images/nature.jpg", scene);
            materialforbox.diffuseTexture.uOffset = 0.5;
            materialforbox.diffuseTexture.vOffset = 0.5;
            materialforbox.diffuseTexture.uScale = 5.0;
            materialforbox.diffuseTexture.vScale = 5.0;
            return scene;
         };
         var scene = createScene();
         engine.runRenderLoop(function() {
            scene.render();
         });
      </script>
   </body>
</html>