12 BK.Mesh 网格

网格 通过自定义顶点数组，映射到纹理中的不同位置中，可以做成非常灵活的多边形等

父类 BK.Node

成员变量

方法

构造函数 new BK.Mesh(tex,vertexes,indices);

返回值： 网格对象

例子：

//下方例子为一个正方形图片
var tex =new BK.Texture('GameRes://texture/terrain.png');
var vertexes = [
                {"x":100, "y":100,"z":0,"r":1,"g":1,"b":1,"a":1,"u":1,"v":1},
                {"x":100, "y":0,"z":0,"r":1,"g":1,"b":1,"a":1,"u":1,"v":0},
                {"x":0, "y":0,"z":0,"r":1,"g":1,"b":1,"a":1,"u":0,"v":0},
                {"x":0, "y":0,"z":0,"r":1,"g":1,"b":1,"a":1,"u":0,"v":0},
                {"x":0, "y":100,"z":0,"r":1,"g":1,"b":1,"a":1,"u":0,"v":1},
                {"x":100, "y":100,"z":0,"r":1,"g":1,"b":1,"a":1,"u":1,"v":1},

                ];
var indices = [0,1,2,3,4,5];
var  mesh = new BK.Mesh(tex,vertexes,indices);

setTexture(texture)

设置纹理

返回值：无

addVerticesAndIndices(newVertexes,newIndices)

新增顶点与索引数组。在现有的顶点数组和索引数组后添加新的索引点

返回值： 无

例子：

var tex =new BK.Texture('GameRes://texture/terrain.png');
var  vertexes = [
     {"x":0, "y":0,"z":0,     "r":1,"g":1,"b":1,"a":1, "u":0,"v":0},
     {"x":320, "y":0,"z":0,   "r":1,"g":1,"b":1,"a":1, "u":0,"v":0},
     {"x":320, "y":320,"z":0, "r":1,"g":1,"b":1,"a":1, "u":0,"v":0},
];
var indices = [0,1,2];
var  mesh = new BK.Mesh(tex,vertexes,indices);
BK.Director.root.addChild(mesh);


//新增顶点与索引数组
var  newVertexes = [
     {"x":0, "y":320,"z":0, "r":1,"g":1,"b":1,"a":1, "u":0,"v":0},
];
var newIndices = [0,2,3];

//由三个顶点加到四个顶点，并加上三个索引数组
//此时有四个顶点(0,0)(320,0),(320,320),(0,320)，6个索引值 [0,1,2,0,2,3]
mesh.addVerticesAndIndices(newVertexes,newIndices);

removeVerticesAndIndices(vexIdx,vexLen,iIdx,iLen)

移除顶点与索引数组。根据顶点数组的下标和长度、索引数组的下标和长度，移除顶点数组和索引数组的元素

返回值：无

例子：

//延续addVerticesAndIndices方法中的例子
//此时有四个顶点(0,0)(320,0),(320,320),(0,320)，6个索引值 [0,1,2,0,2,3]

//顶点数组中，删除从中第4个开始，删除1个元素
//索引数组中，删除从中第4个开始，删除3个元素
mesh.removeVerticesAndIndices(3,1,3,3);

setVerticesAndIndices(vertexes,indices)

重置所有的顶点与索引数组

返回值：无

getVertices()

获取当前Mesh的顶点数组

参数:无

返回值：

getIndices()

获取当前Mesh的索引数组

参数:无

返回值：

例子

查看 script/demo/render/mesh_demo.js