gpuDeltaX
==================

.. js:function:: FullyConnectedLayer.gpuDeltaX()

    GPUによるδxの計算

ソース
^^^^^^

.. code-block:: js

            gpuDeltaX(){
                var vertex_shader = Shaders.FullyConnectedLayer_DeltaX;
    
                var param_id = "Fully-Connected-Layer-gpu-delta-X," + miniBatchSize + "," + this.prevLayer.unitSize + "," + this.unitSize;
                if (this.params[param_id] == undefined){
    
                    this.params[param_id] = {
                        id : param_id,
                        vertexShader: vertex_shader,
                        args : {
                            "zero": new Float32Array(miniBatchSize * this.prevLayer.unitSize),
                            "W": makeTextureInfo(WebGL2, "float", this.weight),
                            "deltaZ": makeTextureInfo(WebGL2, "float", this.deltaZ),
                            "deltaX" : this.deltaX.dt
                        }
                    };
                }
    
                var param = this.params[param_id];
                param.args["deltaZ"].value = this.deltaZ.dt;
    
                WebGL2.compute(param);
            }