Sine Distort

Sine Distort
Distorts an image using sine.

Source
https://github.com/amsqr/Chromanin.js

Notes
This does not work the same as the code it was made from.
The way the edges are handled is different...might look at it later, but probably not 😉
Still, makes some cool looks.

Code
Configuration

Configuration.AddEditBox("_dx", "dx", "", 0.100000001490116);
Configuration.AddEditBox("_dy", "dy", "", 0.125);
Configuration.AddEditBox("_depthX", "depthX", "", 25);
Configuration.AddEditBox("_depthY", "depthY", "", 20);

Execution

var image = Document.RasterImage;
var clone = Document.Duplicate();
clone = clone.RasterImage;

var w = image.sizeX;
var h = image.sizeY;

function getBilerpixel(l, x, y) {
	var corner = [];
	var xi, yi, xip, xip1;
	var yip, yip1;

	xi = ~~x;
	yi = ~~y;
	xip = Math.max(Math.min(xi , w-1),0);
	xip1 = Math.max(Math.min(xi + 1,w-1),0) ;
	yip1 = Math.max(Math.min(yi + 1, h-1),0);
	yip = Math.max(Math.min(yi , h-1),0);

	corner[0] = l.GetPixel(xip,yip,0,0);//this.layers[l].data32[xip + yip];
	corner[1] = l.GetPixel(xip1,yip,0,0);//this.layers[l].data32[xip1 + yip];
	corner[2] = l.GetPixel(xip,yip1,0,0);//this.layers[l].data32[xip + yip1];
	corner[3] =  l.GetPixel(xip1,yip1,0,0);//this.layers[l].data32[xip1 + yip1];

	return cosineInterpolate(corner, (x - xi), (y - yi));
}

function cosineInterpolate(v, x, y) {
	var f1, f2, mf1, mf2, g0, g1, g2, g3;
	var color,r,g,b;
	mf1 = (1 - Math.cos(x * Math.PI)) * 0.5;
	mf2 = (1 - Math.cos(y * Math.PI)) * 0.5;
	var f1 = 1 - mf1;
	var f2 = 1 - mf2;
	var g0 = f1 * f2;
	var g1 = mf1 * f2;
	var g2 = f1 * mf2;
	var g3 = mf1 * mf2;

	color = ((v[0] & 255) * g0 + (v[1] & 255) * g1 + (v[2] & 255) * g2 + (v[3] & 255) * g3);
	color = color | ((((v[0] >> 8 & 255) * g0 + (v[1] >> 8 & 255) * g1 + (v[2] >> 8 & 255) * g2 + (v[3] >> 8 & 255) * g3) & 255) << 8);
	color = color | ((((v[0] >> 16 & 255) * g0 + (v[1] >> 16 & 255) * g1 + (v[2] >> 16 & 255) * g2 + (v[3] >> 16 & 255) * g3) & 255) << 16);
	color = color | ((((v[0] >> 24 & 255) * g0 + (v[1] >> 24 & 255) * g1 + (v[2] >> 24 & 255) * g2 + (v[3] >> 24 & 255) * g3) & 255) << 24);
	return color;
}

var dx=Configuration._dx;
var dy=Configuration._dy;
var depthX=Configuration._depthX;
var depthY=Configuration._depthY;

var lookupX=[],lookupY=[];
for(var x=0;x<w;x++){
	lookupX[x]=Math.sin(dy * x) * depthY;
}
for(var y=0;y<h;y++){
	lookupY[y]= Math.sin(dx * y) * depthX;
}

var c;

for (x=0; x<w; x++){
for (y=0; y<h; y++){

c = getBilerpixel(clone, lookupY[y]+x, lookupX[x]+y);
image.SetPixel(x, y, 0, 0, c);

}
}