--track@d:Distortion,-10,10,0,0.01
--track@cx:X,-4000, 4000, 0, 1
--track@cy:Y,-4000, 4000, 0, 1
--track@pow:Pow,0.1,10,2,0.01
--track@lim:Limit,-10,0,-0.5,0.01
--label:変形
--[[pixelshader@psmain:
Texture2D tex : register(t0);
cbuffer constant0 : register(b0) {
    float d;
    float p;
    float2 resolution;
	float2 offset;
    float2 _pad1;
    float lim;
};
float4 psmain(float4 pos : SV_Position) : SV_Target {
    float2 centered = pos.xy - (resolution/2) - offset; //中心変換
	float r = length(centered/resolution);
	float denom = 1-pow(r,p)*max(d,lim)*10;
    denom = max(denom, 0.001); //でかすぎると画面外に変なのが発生
	float zoom = (d < lim) ? 1.0 + pow(max(-d +lim, 0.0),1.4) : 1.0; //歪みを小さくしすぎると破綻するので拡大でごまかす 下限をどこに設定すればいいかわからないからトラックバーに置いた
    float2 distorted = centered/denom/zoom;
    float2 texcoord = distorted+(resolution/2)+offset;
    return tex[int2(texcoord)];
}
]]
local w,h=obj.getpixel()
obj.pixelshader("psmain", "object", "object", {d,pow,w,h,cx,cy,0,0,lim})

--縦横比とかつけたいけど領域拡張で済む問題だしまあええか……