egret-docs-master/Engine3D/Egret3DDisp/Terrain/README.md

Terrain

根据高度图创建地形网格信息 进行显示

---

// 加载地形的资源
protected loaderTerrain() {
    var loader = new egret3d.QueueLoader();

    loader.addEventListener(egret3d.LoaderEvent3D.LOADER_COMPLETE, this.onTerrainComplete, this);

    // 高度图
    loader.load("resource/doc/ziyan_xinshou/Heightmap_0.jpg");
    // 地形混合图
    loader.load("resource/doc/ziyan_xinshou/Alphamap_0.jpg");
    // 地表贴图 4张
    loader.load("resource/doc/ziyan_xinshou/SplatPrototype_texture_0.jpg");
    loader.load("resource/doc/ziyan_xinshou/SplatPrototype_texture_1.jpg");
    loader.load("resource/doc/ziyan_xinshou/SplatPrototype_texture_2.jpg");
    loader.load("resource/doc/ziyan_xinshou/SplatPrototype_texture_3.jpg");
}

private onTerrainComplete(e: egret3d.LoaderEvent3D) {
    var loader: egret3d.QueueLoader = e.target;

    // 使用高度图创建地形
    var heightImage: egret3d.ImageTexture = <egret3d.ImageTexture>loader.getAsset("resource/doc/ziyan_xinshou/Heightmap_0.jpg");
    var terrain: egret3d.Terrain = new egret3d.Terrain(heightImage, 2000, 500, 2000, 200, 200);
    var mat: egret3d.MaterialBase = terrain.material;
    //mat.gloss = 10.0;
    mat.repeat = true;

    this.view.addChild3D(terrain);

    // 给地形增加地形混合渲染方法
    var terrainMethod: egret3d.TerrainARGBMethod = new egret3d.TerrainARGBMethod(
        egret3d.CheckerboardTexture.texture,
        egret3d.CheckerboardTexture.texture,
        egret3d.CheckerboardTexture.texture,
        egret3d.CheckerboardTexture.texture,
        egret3d.CheckerboardTexture.texture);

    mat.diffusePass.addMethod(terrainMethod);

    terrainMethod.setUVTitling(0, 26.7, 26.7);
    terrainMethod.setUVTitling(1, 16, 16);
    terrainMethod.setUVTitling(2, 26.7, 26.7);
    terrainMethod.setUVTitling(3, 26.7, 26.7);

    // 设置混合贴图和地表贴图
    terrainMethod.controlTexture = loader.getAsset("resource/doc/ziyan_xinshou/Alphamap_0.jpg");
    terrainMethod.splat_0_Texture = loader.getAsset("resource/doc/ziyan_xinshou/SplatPrototype_texture_0.jpg");
    terrainMethod.splat_1_Texture = loader.getAsset("resource/doc/ziyan_xinshou/SplatPrototype_texture_1.jpg");
    terrainMethod.splat_2_Texture = loader.getAsset("resource/doc/ziyan_xinshou/SplatPrototype_texture_2.jpg");
    terrainMethod.splat_3_Texture = loader.getAsset("resource/doc/ziyan_xinshou/SplatPrototype_texture_3.jpg");
}

---