BabylonJS - 镜头眩光

当光线散射并落在图像上时，您会看到外观不同的图像，颜色也会发生变化。当您开发游戏来展示真实的光效时，会使用镜头眩光。考虑太阳光线落在镜子上，所看到的效果通常称为镜头眩光。

语法

以下是创建镜头眩光的语法 −

var lensFlareSystem = new BABYLON.LensFlareSystem("lensFlareSystem", light0, scene);

参数

考虑以下参数来创建镜头眩光 −

Name −为镜头眩光系统指定的名称。
Light − 可以是光源或相机。
scene − 将添加镜头眩光的场景。

要向场景添加眩光，请执行以下命令 −

var flare1 = new BABYLON.LensFlare(0.5, 0.15, new BABYLON.Color3(1, 1, 1), "images/sun1.png", lensFlareSystem);

大小 − 0 到 1 之间的浮动值。
位置 −镜头光晕的源(发射器)(可以是相机、灯光或网格)。
Lensflaresystem − 使用 lensflaresystem 类创建的对象。

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 = BABYLON.Color3.Gray();
            var camera = new BABYLON.ArcRotateCamera(
               "Camera", -Math.PI / 2, 1.5, 15, BABYLON.Vector3.Zero(), scene);
            camera.attachControl(canvas, false);

            var light1 = new BABYLON.HemisphericLight("light1", new BABYLON.Vector3(0, -1, 0), scene);
            light1.groundColor = new BABYLON.Color3(0.2, 0.2, 0.2);
            light1.intensity = 0.5;
            
            var bigdiamond = BABYLON.Mesh.CreateSphere("sphere", 32,6, scene);
            bigdiamond.visibility = 0.6;
            var dmat = new BABYLON.StandardMaterial("dmat", scene);
            dmat.diffuseColor = BABYLON.Color3.Blue();
            
            var texture = new BABYLON.Texture("images/earth.jpg", scene);
            dmat.diffuseTexture = texture;		
            dmat.specularColor = BABYLON.Color3.White();
            bigdiamond.material = dmat;

            var lensflare1 = new BABYLON.LensFlareSystem("lensFlareSystem", camera, scene);
            var flare1 = new BABYLON.LensFlare(
               Math.random(), 0.15, new BABYLON.Color3(1, 1, 1), "images/sun1.png", lensflare1);

            var lensflare2 = new BABYLON.LensFlareSystem("lensFlareSystem", camera, scene);
            var flare2 = new BABYLON.LensFlare(
               Math.random()/2, 0.1, new BABYLON.Color3(1, 0, 0), "images/sun1.png", lensflare2);

            var lensflare3 = new BABYLON.LensFlareSystem("lensFlareSystem", camera, scene);
            var flare3 = new BABYLON.LensFlare(
               Math.random()/8, 0.1, new BABYLON.Color3(1, 0, 1), "images/sun1.png", lensflare3);

            var lensflare4 = new BABYLON.LensFlareSystem("lensFlareSystem", camera, scene);
            var flare4 = new BABYLON.LensFlare(
               Math.random()/12, 0.1, new BABYLON.Color3(0, 1, 0), "images/sun1.png", lensflare4);

            scene.registerBeforeRender(function() {
               scene.getCameraByID("Camera").alpha += 0.01;
            });		
            return scene;
         };
         var scene = createScene();
         engine.runRenderLoop(function() {
            scene.render();
         });
      </script>
   </body>
</html>