---

/*{
	"CATEGORIES": [
		"Distortion Effect"
	],
	"DESCRIPTION": "Displaces image randomly",
	"ISFVSN": "2",
	"INPUTS": [
		{
			"NAME": "inputImage",
			"TYPE": "image"
		},
		{
			"NAME": "displaceX",
			"TYPE": "float",
			"MAX": 0.1,
			"DEFAULT": 0,
			"MIN": 0,
			"LABEL": "Displace X"
		},
		{
			"NAME": "displaceY",
			"TYPE": "float",
			"MAX": 0.1,
			"DEFAULT": 0,
			"MIN": 0,
			"LABEL": "Displace Y"
		},
		{
			"NAME": "detailX",
			"TYPE": "float",
			"MAX": 1,
			"DEFAULT": 0.1,
			"MIN": 0,
			"LABEL": "Detail X"
		},
		{
			"NAME": "detailY",
			"TYPE": "float",
			"MAX": 1,
			"DEFAULT": 0.1,
			"MIN": 0,
			"LABEL": "Detail Y"
		},
		{
			"NAME": "updateTime",
			"TYPE": "float",
			"MAX": 0.1,
			"DEFAULT": 0.01,
			"MIN": 0,
			"LABEL": "Frequency"
		}
	],
	"CREDIT": "VIDVOX"
}
*/


float rand(vec2 co){
    return fract(sin(dot(co.xy ,vec2(12.9898,78.233))) * 43758.5453);
}

void main(){

	vec4 inputPixelColor;
	vec2 uv = (isf_FragNormCoord.xy).xy;
	float wobbleTime = (updateTime == 0.0) ? TIME : floor(TIME/updateTime);
	vec2 waveLoc = fract((uv)*vec2(detailX, detailY));
	float val1 = rand(vec2(waveLoc.x, wobbleTime));
	float val2 = rand(vec2(waveLoc.y, wobbleTime+1.0));
	vec2 wave = vec2(val1, val2)-0.5;
	wave *= vec2(displaceY, displaceX);

	inputPixelColor = IMG_NORM_PIXEL(inputImage, vec2(uv + wave.yx));

	gl_FragColor = inputPixelColor;
}