Aar0n /*
该类需继承自显示对象类
在该类中使用了自定义的着色器程序
注意：使用自定义着色器时，需要设置该显示对象类的渲染模式this._renderType |= Laya.RenderSprite.CUSTOM;并且需要重写该类的渲染处理函数
*/
var myShaderSprite = (function (_super) {
this.iNum = 0;
function myShaderSprite() {
myShaderSprite.super(this);
}
Laya.class(myShaderSprite, "myShaderSprite", _super);
/*
初始化此类
texture纹理对象
vb顶点数组
ib顶点索引数组
*/
myShaderSprite.prototype.init = function(texture,width_Size,height_Size,vb,ib){
this.vBuffer = Laya.VertexBuffer2D.create();
this.iBuffer = Laya.IndexBuffer2D.create();
this.ibData = new Uint16Array();
if(vb) {
vbArray = vb;
}
else{
vbArray = [];
var texWidth = texture.width;
var texHeight = texture.height;
// console.log("liuyi",texWidth);
//定义颜色值，取值范围0~1浮点
var red = 1;
var greed = 1;
var blue = 1;
var alpha = 1;
//在顶点数组中放入4个顶点
//每个顶点的数据：（坐标x，坐标y，u，v，R,G,B,A）
if(width_Size > 0 && height_Size > 0){
vbArray.push(0, 0, 0, 0, red, greed, blue, alpha);
vbArray.push(texWidth*width_Size, 0 , 1, 0, red, greed, blue, alpha);
vbArray.push(texWidth*width_Size, texHeight*height_Size, 1, 1, red, greed, blue, alpha);
vbArray.push(0, texHeight*height_Size, 0, 1,red, greed, blue, alpha);
}else{
vbArray.push(0, 0, 0, 0, red, greed, blue, alpha);
vbArray.push(texWidth, 0, 1, 0, red, greed, blue, alpha);
vbArray.push(texWidth, texHeight, 1, 1, red, greed, blue, alpha);
vbArray.push(0, texHeight, 0, 1, red, greed, blue, alpha);
}
}
if(ib){
ibArray = ib;
}
else{
ibArray = [];
//在顶点索引数组中放入组成三角形的顶点索引
//三角形的顶点索引对应顶点数组vbArray里的点索引，索引从0开始
ibArray.push(0,1,3);//从第一个三角形的顶点索引
ibArray.push(3,1,2);//第二个三角形的顶点索引
}
this.iNum = ibArray.length;
this.vbData = new Float32Array(vbArray);
this.ibData = new Uint16Array(ibArray);
this.vBuffer.append(this.vbData);
this.iBuffer.append(this.ibData);
this.shaderValue = new myShaderValue();
this.shaderValue.textureHost = texture;
this._renderType |= Laya.RenderSprite.CUSTOM;//设置当前显示对象的渲染模式为自定义渲染模式
}
//重写渲染函数
myShaderSprite.prototype.customRender = function(context,x,y){
context.ctx.setIBVB(x, y, (this.iBuffer), (this.vBuffer), this.iNum, null, myShader.shader, this.shaderValue, 0, 0);
}
return myShaderSprite;
})(Laya.Sprite);
