Line Smear - RealWorld forums

Line Smear

PAEz
on November 8th 2013

Smears lines.

Code
Configuration

``````Configuration.AddSlider("size", "Distance", "Be warned, the larger the size the longer it will take.", 1, 100, 8);
Configuration.AddSlider("density", "Density Percentage", "", 1, 100, 50);
Configuration.AddSlider("angle", "Angle", "", 1, 360, 1);
Configuration.AddSlider("mix", "Mix Percentage", "Who much of the smear to mix with orginal image, 1 will replace the image.", 1, 100, 50);``````

Execution

``````// Joel Besada
// Plus PAEz touch here and there

this.mixColors = function(t, rgb1, rgb2){
var r = this.linearInterpolate(t,rgb1 >> 16 & 255,rgb2 >> 16 & 255);
var g = this.linearInterpolate(t,rgb1 >> 8 & 255,rgb2 >> 8 & 255);
var b = this.linearInterpolate(t,rgb1 & 255,rgb2 & 255);
var a = this.linearInterpolate(t,rgb1 >> 24 & 255,rgb2 >> 24 & 255);
return b | (g << 8) | (r << 16) | (a << 24);
}

this.linearInterpolate = function(t,a,b){
return a + t * (b-a);
}

filter = function(distance, density, angle, mix) {
var output = Document.RasterImage;
var width = output.sizeX;
var height = output.sizeY;

var input = Document.Duplicate();
input = input.RasterImage;
angle = angle/180*Math.PI;
var sinAngle = Math.sin(angle);
var cosAngle = Math.cos(angle);
var numShapes = parseInt(2*density*width*height / 2);
for(var i = 0; i < numShapes; i++){
var sx = (Math.random()*Math.pow(2,32) & 0x7fffffff) % width;
var sy = (Math.random()*Math.pow(2,32) & 0x7fffffff) % height;
var length = (Math.random()*Math.pow(2,32) & 0x7fffffff) % distance + 1;
var rgb2 = input.GetPixel(sx,sy,0,0);
var dx = parseInt(length*cosAngle);
var dy = parseInt(length*sinAngle);

var x0 = sx-dx;
var y0 = sy-dy;
var x1 = sx+dx;
var y1 = sy+dy;
var x, y, d, incrE, incrNE, ddx, ddy;

if (x1 < x0){
ddx = -1;
} else {
ddx = 1;
}
if (y1 < y0){
ddy = -1;
} else {
ddy = 1;
}
dx = x1-x0;
dy = y1-y0;
dx = Math.abs(dx);
dy = Math.abs(dy);
x = x0;
y = y0;

if (x < width && x >= 0 && y < height && y >= 0) {
var rgb1 = output.GetPixel(x,y,0,0);
var mixedRGB = mixColors(mix,rgb1,rgb2)
output.SetPixel(x,y,0,0,mixedRGB);
}
if (Math.abs(dx) > Math.abs(dy)) {
d = 2*dy-dx;
incrE = 2*dy;
incrNE = 2*(dy-dx);

while (x != x1) {
if (d <= 0)
d += incrE;
else {
d += incrNE;
y += ddy;
}
x += ddx;
if (x < width && x >= 0 && y < height && y >= 0) {
var rgb1 = output.GetPixel(x,y,0,0);
var mixedRGB = mixColors(mix,rgb1,rgb2);
output.SetPixel(x,y,0,0,mixedRGB);
}
}
} else {
d = 2*dx-dy;
incrE = 2*dx;
incrNE = 2*(dx-dy);

while (y != y1) {
if (d <= 0)
d += incrE;
else {
d += incrNE;
x += ddx;
}
y += ddy;
if (x < width && x >= 0 && y < height && y >= 0) {
var rgb1 = output.GetPixel(x,y,0,0);
var mixedRGB = mixColors(mix,rgb1,rgb2)
output.SetPixel(x,y,0,0,mixedRGB);
}
}
}
}
}

var size = Configuration.size;
var density = Configuration.density/100;
var angle = Configuration.angle-1; // When I tried it angle was odd.  89, was 90, well straight...360 made it bug
var mix = Configuration.mix/100;
filter(size, density, angle, mix);``````
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