妙用Pixel bender执行复杂运算/普通数据运算 传递Vector数组

var width :int = 3;
var height:int = 3;
var vector:Vector.<Number> = new Vector.<Number>;
var counter:int = 1;
 
//利用vector作为input，需要从左上角到右下角，逐行逐行把每个像素的3通道信息，以3个Number形式表示
for (var i:int = 0; i < width; i++)
{
        for (var j:int = 0; j < height; j++)
       {
              vector.push(counter, counter, counter);
              counter++;
       }
}
 
//目的是格式化输出，好看。。。
for (var k:int = 0; k < vector.length; k+=3* width)
{
        var array:Array = new Array();
        for (var i2:int = 0; i2 < width ; i2++)
       {
              array.push(vector[k+i2*3] + "," + vector[k+1+i2*3] + "," + vector[k+2+i2*3]);
       }
        trace(array.join("   "));
}
 
trace ("=====================");
 
var shader:Shader = new Shader( new PbjClass() as ByteArray );
shader.data.src.input = vector;
shader.data.src.width = width;//这里必须指定width和height，否则出错 
shader.data.src.height = height;
 
var result:Vector.<Number> = new Vector.<Number>();     
//这里必须指定width和height，否则出错            
var job:ShaderJob = new ShaderJob(shader, result, width, height);
job.start(true);
 
//目的是格式化输出，好看。。。
for (var k:int = 0; k < result.length; k+=3* width)
{
        var array:Array = new Array();
        for (var i2:int = 0; i2 < width ; i2++)
       {
              array.push(result[k+i2*3] + "," + result[k+1+i2*3] + "," + result[k+2+i2*3]);
       }
        trace(array.join("   "));
}

1,1,1   2,2,2   3,3,3
4,4,4   5,5,5   6,6,6
7,7,7   8,8,8   9,9,9
=====================
1,1,1   1,1,1   2,2,2
4,4,4   4,4,4   5,5,5
7,7,7   7,7,7   8,8,8

<languageVersion : 1.0;>

kernel test
<   namespace : "Your Namespace";
    vendor : "Your Vendor";
    version : 1;
>
{
    input image3 src;          //注意这里是3，不是4.如果是4的话，就会报错。着色器输入 src 没有足够的数据。因为as代码中初始化输入只是用了3元组
    output pixel3 dst;

    void
    evaluatePixel()
    {
          float2 coord = outCoord();
          pixel3 px = sampleNearest(src, coord + float2(-1.0, 0.0));
        dst.x = px.x;
        dst.y = px.y;
        dst.z = px.z;
    }
}