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/*
Modified by Matt McWilliams 2021
stipple_gen
This application is intended to replace the original UI of StippleGen_2 with
a simple Processing application that can be run using command line arguments or
a config file. Arguments take precedence over the config file.
Why do it this way? So that the stippling process can be run headless with a config file
or command line arguments. Why do that? So this application can be used for
automated image generation.
License: LGPL 2.1
*******************************************************************************
HISTORY
*******************************************************************************
Program is based on StippleGen_2
SVG Stipple Generator, v. 2.31
Copyright (C) 2013 by Windell H. Oskay, www.evilmadscientist.com
Full Documentation: http://wiki.evilmadscience.com/StippleGen
Blog post about the release: http://www.evilmadscientist.com/go/stipple2
An implementation of Weighted Voronoi Stippling:
http://mrl.nyu.edu/~ajsecord/stipples.html
*******************************************************************************
StippleGen_2 is based on the Toxic Libs Library ( http://toxiclibs.org/ )
& example code:
http://forum.processing.org/topic/toxiclib-voronoi-example-sketch
Additional inspiration:
Stipple Cam from Jim Bumgardner
http://joyofprocessing.com/blog/2011/11/stipple-cam/
and
MeshLibDemo.pde - Demo of Lee Byron's Mesh library, by
Marius Watz - http://workshop.evolutionzone.com/
Requires Toxic Libs library:
http://hg.postspectacular.com/toxiclibs/downloads
*/
/*
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* http://creativecommons.org/licenses/LGPL/2.1/
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
import toxi.geom.*;
import toxi.geom.mesh2d.*;
import toxi.util.datatypes.*;
import toxi.processing.*;
ToxiclibsSupport gfx;
public class Config {
private String filePath;
private File file;
private String[] data;
public int canvasWidth = 800;
public int canvasHeight = 600;
public float canvasScalar = 1.0;
public boolean display = true;
public int windowWidth = 800;
public int windowHeight = 600;
public boolean invert = false;
public boolean selectInput = false;
public String inputImage;
public String outputImage;
public String outputSVG;
public int centroidsPerPass = 500;
public int testsPerFrame = 90000; //
public int maxGenerations = 5; //number of generations
public float minDotSize = 1.25; //2;
public float maxDotSize;
public float dotSizeFactor = 4; //5;
public int maxParticles = 2000; // Max value is normally 10000.
public float cutoff = 0; // White cutoff value
public int optimize = 1000;
public boolean gammaCorrection = false;
public float gamma = 1.0;
public boolean fill = false;
public float fillAngle = 45.0;
public boolean fillRandom = false;
public boolean dot = false;
public float line = 1.0;
public String mode = "stipple"; //tsp
public Config (String inputFile) {
int index;
String[] parts;
file = new File(inputFile);
filePath = file.getAbsolutePath();
boolean exists = file.isFile();
filePath = file.getAbsolutePath();
exists = file.isFile();
index = argIndex("--config");
if (index == -1) {
index = argIndex("-c");
}
if (index > -1) {
file = new File(args[index + 1]);
filePath = file.getAbsolutePath();
exists = file.isFile();
}
if (exists) {
println("Using config " + filePath);
file = new File(filePath);
data = loadStrings(filePath);
}
if (data != null) {
for (int i = 0; i < data.length; i++) {
parts = splitTokens(data[i], "=");
setVar(parts[0], parts[1], filePath);
}
}
if (args != null) {
for (int i = 0; i < args.length; i+=2) {
if (args[i].startsWith("--")) {
setVar(args[i].substring(2), args[i+1], "args");
} else {
setVar(args[i], args[i+1], "args");
}
}
}
}
private int argIndex (String arg) {
int index = -1;
if (args != null) {
for (int i = 0; i < args.length; i++) {
if ( args[i].startsWith(arg) ) {
index = i;
}
}
}
return index;
}
private int intOrDie (String name, String val) {
int intVal = -1;
try {
intVal = parseInt(val);
} catch (Exception e) {
println("Error parsing value " + name);
println(e);
exit();
}
return intVal;
}
private boolean boolOrDie (String name, String val) {
String[] truthy = { "true", "on", "t" };
String[] falsey = { "false", "off", "f" };
boolean boolVal = true;
String compare = val.trim().toLowerCase();
for (int i = 0; i < truthy.length; i++) {
if (truthy[i].equals(compare)) {
boolVal = true;
break;
}
}
for (int i = 0; i < falsey.length; i++) {
if (falsey[i].equals(compare)) {
boolVal = false;
break;
}
}
return boolVal;
}
private float floatOrDie (String name, String val) {
float floatVal = -1.0;
try {
floatVal = parseFloat(val);
} catch (Exception e) {
println("Error parsing value " + name);
println(e);
exit();
}
return floatVal;
}
private String strOrDie (String name, String val) {
return val.trim();
}
public void setVar (String name, String val, String source) {
switch (name) {
case "canvasWidth" :
canvasWidth = intOrDie(name, val);
break;
case "canvasHeight" :
canvasHeight = intOrDie(name, val);
break;
case "canvasScalar" :
canvasScalar = floatOrDie(name, val);
break;
case "display" :
display = boolOrDie(name, val);
break;
case "windowWidth" :
windowWidth = intOrDie(name, val);
break;
case "windowHeight" :
windowHeight = intOrDie(name, val);
break;
case "invert" :
invert = boolOrDie(name, val);
break;
case "inputImage" :
inputImage = strOrDie(name, val);
break;
case "outputImage" :
outputImage = strOrDie(name, val);
break;
case "outputSVG" :
outputSVG = strOrDie(name, val);
break;
case "centroidsPerPass" :
centroidsPerPass = intOrDie(name, val);
break;
case "testsPerFrame" :
testsPerFrame = intOrDie(name, val);
break;
case "maxGenerations" :
maxGenerations = intOrDie(name, val);
break;
case "minDotSize" :
minDotSize = floatOrDie(name, val);
break;
case "maxDotSize" :
maxDotSize = floatOrDie(name, val);
break;
case "dotSizeFactor" :
dotSizeFactor = floatOrDie(name, val);
break;
case "maxParticles" :
maxParticles = intOrDie(name, val);
break;
case "cutoff" :
cutoff = intOrDie(name, val);
break;
case "gammaCorrection" :
gammaCorrection = boolOrDie(name, val);
break;
case "gamma" :
gamma = floatOrDie(name, val);
case "fill" :
fill = boolOrDie(name, val);
break;
case "fillAngle" :
fillAngle = floatOrDie(name, val);
break;
case "fillRandom" :
fillRandom = boolOrDie(name, val);
break;
case "dot" :
dot = boolOrDie(name, val);
break;
case "line" :
line = floatOrDie(name, val);
break;
case "mode" :
mode = strOrDie(name, val);
break;
case "optimize" :
optimize = intOrDie(name, val);
break;
}
println("[" + source + "] " + name + "=" + val);
}
}
Config config;
final float ACCY = 1E-9f;
int cellBuffer = 100; //Scale each cell to fit in a cellBuffer-sized square window for computing the centroid.
int borderWidth = 6;
float imageRatio;
float mainRatio;
float windowRatio;
float lowBorderX;
float hiBorderX;
float lowBorderY;
float hiBorderY;
boolean ReInitiallizeArray;
boolean fileLoaded;
int SaveNow;
String[] FileOutput;
String StatusDisplay = "Initializing, please wait. :)";
String lastStatusDisplay = "";
float millisLastFrame = 0;
float frameTime = 0;
String ErrorDisplay = "";
float ErrorTime;
Boolean ErrorDisp = false;
int Generation;
int lastGeneration = 0;
int particleRouteLength;
int RouteStep;
boolean showBG;
boolean showPath;
boolean showCells;
boolean TempShowCells;
boolean FileModeTSP = false;
int vorPointsAdded;
boolean VoronoiCalculated;
// Toxic libs library setup:
Voronoi voronoi;
Polygon2D RegionList[];
PolygonClipper2D clip; // polygon clipper
int cellsTotal, cellsCalculated, cellsCalculatedLast;
PImage img, imgload, imgblur;
PGraphics canvas;
Vec2D[] particles;
int[] particleRoute;
String[] header = {"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><!-- Created for Inkscape (http://www.inkscape.org/) --><svg xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:cc=\"http://creativecommons.org/ns#\" xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\" xmlns:svg=\"http://www.w3.org/2000/svg\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:sodipodi=\"http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd\" xmlns:inkscape=\"http://www.inkscape.org/namespaces/inkscape\" width=\"{{WIDTH}}\" height=\"{{HEIGHT}}\" id=\"svg2985\" version=\"1.1\" inkscape:version=\"0.48.1 r9760\"> <defs id=\"defs2987\" /> <sodipodi:namedview id=\"base\" pagecolor=\"#ffffff\" bordercolor=\"#666666\" borderopacity=\"1.0\" inkscape:pageopacity=\"0.0\" inkscape:pageshadow=\"2\" inkscape:zoom=\"0.35\" inkscape:cx=\"0\" inkscape:cy=\"0\" inkscape:document-units=\"px\" inkscape:current-layer=\"layer1\" showgrid=\"false\" /> <metadata id=\"metadata2990\"> <rdf:RDF> <cc:Work rdf:about=\"\"> <dc:format>image/svg+xml</dc:format> <dc:type rdf:resource=\"http://purl.org/dc/dcmitype/StillImage\" /> <dc:title /> </cc:Work> </rdf:RDF> </metadata> <g inkscape:label=\"Layer 1\" inkscape:groupmode=\"layer\" id=\"layer1\"> <g>"};
void LoadImageAndScale() {
int tempx = 0;
int tempy = 0;
img = createImage(config.canvasWidth, config.canvasHeight, RGB);
imgblur = createImage(config.canvasWidth, config.canvasHeight, RGB);
img.loadPixels();
if (config.invert) {
for (int i = 0; i < img.pixels.length; i++) {
img.pixels[i] = color(0);
}
} else {
for (int i = 0; i < img.pixels.length; i++) {
img.pixels[i] = color(255);
}
}
img.updatePixels();
if (config.inputImage != null) {
imgload = loadImage(config.inputImage);
fileLoaded = true;
}
if (config.display && config.selectInput && config.inputImage == null && !fileLoaded ) {
noLoop();
LOAD_FILE();
return;
}
if ( fileLoaded == false) {
// Load a demo image, at least until we have a "real" image to work with.
imgload = loadImage("grace.jpg"); // Load demo image
}
imageRatio = (float) imgload.width / (float) imgload.height;
mainRatio = (float) config.canvasWidth / (float) config.canvasHeight;
windowRatio = (float) config.windowWidth / (float) config.windowHeight;
println("Image: " + imgload.width + "x" + imgload.height);
println("Ratio: " + imageRatio);
println("Main : " + config.canvasWidth + "x" + config.canvasHeight);
println("Ratio: " + mainRatio);
//resize the image to fit within canvas size
if ((imgload.width > config.canvasWidth) || (imgload.height > config.canvasHeight)) {
if (imageRatio > mainRatio) {
imgload.resize(config.canvasWidth, 0);
} else {
imgload.resize(0, config.canvasHeight);
}
}
if (imgload.height < (config.canvasHeight - 2) ) {
tempy = (int) (( config.canvasHeight - imgload.height ) / 2) ;
}
if (imgload.width < (config.canvasWidth - 2)) {
tempx = (int) (( config.canvasWidth - imgload.width ) / 2) ;
}
img.copy(imgload, 0, 0, imgload.width, imgload.height, tempx, tempy, imgload.width, imgload.height);
//if (config.invert) {
// img.filter(INVERT);
//}
if (config.gammaCorrection) {
// Optional gamma correction for background image.
img.loadPixels();
float tempFloat; // Normally in the range 0.25 - 4.0
for (int i = 0; i < img.pixels.length; i++) {
tempFloat = brightness(img.pixels[i]) / 255;
img.pixels[i] = color(floor(255 * pow(tempFloat, config.gamma)));
}
img.updatePixels();
}
imgblur.copy(img, 0, 0, img.width, img.height, 0, 0, img.width, img.height);
// This is a duplicate of the background image, that we will apply a blur to,
// to reduce "high frequency" noise artifacts.
imgblur.filter(BLUR, 1); // Low-level blur filter to eliminate pixel-to-pixel noise artifacts.
imgblur.loadPixels();
}
void MainArraysetup() {
// Main particle array initialization (to be called whenever necessary):
LoadImageAndScale();
// image(img, 0, 0); // SHOW BG IMG
particles = new Vec2D[config.maxParticles];
// Fill array by "rejection sampling"
int i = 0;
while (i < config.maxParticles) {
float fx = lowBorderX + random(hiBorderX - lowBorderX);
float fy = lowBorderY + random(hiBorderY - lowBorderY);
float p = brightness(imgblur.pixels[ floor(fy)*imgblur.width + floor(fx) ])/255;
// OK to use simple floor_ rounding here, because this is a one-time operation,
// creating the initial distribution that will be iterated.
if (config.invert) {
p = 1 - p;
}
if (random(1) >= p ) {
Vec2D p1 = new Vec2D(fx, fy);
particles[i] = p1;
i++;
}
}
particleRouteLength = 0;
Generation = 0;
millisLastFrame = millis();
RouteStep = 0;
VoronoiCalculated = false;
cellsCalculated = 0;
vorPointsAdded = 0;
voronoi = new Voronoi(); // Erase mesh
TempShowCells = true;
}
void settings () {
config = new Config(sketchPath() + "/config.txt");
if (config.display == true) {
size(config.windowWidth, config.windowHeight, JAVA2D);
}
}
void setup () {
if (!config.display) {
surface.setVisible(false);
}
canvas = createGraphics(config.canvasWidth, config.canvasHeight, JAVA2D);
gfx = new ToxiclibsSupport(this, canvas);
lowBorderX = borderWidth; //config.canvasWidth*0.01;
hiBorderX = config.canvasWidth - borderWidth; //config.canvasWidth*0.98;
lowBorderY = borderWidth; // config.canvasHeight*0.01;
hiBorderY = config.canvasHeight - borderWidth; //config.canvasHeight*0.98;
int innerWidth = config.canvasWidth - 2 * borderWidth;
int innerHeight = config.canvasHeight - 2 * borderWidth;
clip = new SutherlandHodgemanClipper(new Rect(lowBorderX, lowBorderY, innerWidth, innerHeight));
MainArraysetup(); // Main particle array setup
config.maxDotSize = config.minDotSize * (1 + config.dotSizeFactor); //best way to do this?
ReInitiallizeArray = false;
showBG = false;
showPath = true;
showCells = false;
fileLoaded = false;
SaveNow = 0;
if (config.mode.equals("tsp") || config.mode.equals("TSP")) {
FileModeTSP = true;
println("Using TSP mode");
}
background(0);
}
/***
* Callback for selectInput() in LOAD_FILE.
* Loads file if filetype is acceptable.
***/
void fileSelected (File selection) {
String[] acceptedExt = { "GIF", "JPG", "JPEG", "TGA", "PNG" };
String[] parts;
String loadPath;
boolean fileOK = false;
if (selection == null) {
println("Window was closed or the user hit cancel.");
} else {
//println("User selected " + selection.getAbsolutePath());
loadPath = selection.getAbsolutePath();
// If a file was selected, print path to file
println("Loaded file: " + loadPath);
parts = splitTokens(loadPath, ".");
for (int i = 0; i < acceptedExt.length; i++) {
if ( parts[parts.length - 1].toUpperCase().equals(acceptedExt[i])) {
fileOK = true;
break;
}
}
println("File OK: " + fileOK);
if (fileOK) {
imgload = loadImage(loadPath);
fileLoaded = true;
// MainArraysetup();
ReInitiallizeArray = true;
} else {
// Can't load file
ErrorDisplay = "ERROR: BAD FILE TYPE";
ErrorTime = millis();
ErrorDisp = true;
}
}
LoadImageAndScale();
loop();
}
void LOAD_FILE () {
println(":::LOAD JPG, GIF or PNG FILE:::");
selectInput("Select a file to process:", "fileSelected"); // Opens file chooser
}
void SAVE_PATH() {
FileModeTSP = true;
SAVE_SVG();
}
void SAVE_STIPPLES () {
FileModeTSP = false;
SAVE_SVG();
}
void SaveFileSelected (File selection) {
if (selection == null) {
// If a file was not selected
println("No output file was selected...");
ErrorDisplay = "ERROR: NO FILE NAME CHOSEN.";
ErrorTime = millis();
ErrorDisp = true;
exit();
} else {
config.outputSVG = selection.getAbsolutePath();
String[] p = splitTokens(config.outputSVG, ".");
boolean fileOK = false;
if ( p[p.length - 1].equals("SVG") || p[p.length - 1].equals("svg")) {
fileOK = true;
}
if (fileOK == false) {
config.outputSVG = config.outputSVG + ".svg";
}
// If a file was selected, print path to folder
println("Save file: " + config.outputSVG);
SaveNow = 1;
showPath = true;
ErrorDisplay = "SAVING FILE...";
ErrorTime = millis();
ErrorDisp = true;
}
loop();
}
void SAVE_SVG () {
noLoop();
selectOutput("Output .svg file name:", "SaveFileSelected");
}
void QUIT(float theValue) {
exit();
}
void ORDER_ON_OFF(float theValue) {
if (showPath) {
showPath = false;
} else {
showPath = true;
}
}
void CELLS_ON_OFF(float theValue) {
if (showCells) {
showCells = false;
} else {
showCells = true;
}
}
void IMG_ON_OFF(float theValue) {
if (showBG) {
showBG = false;
} else {
showBG = true;
}
}
void INVERT_IMG(float theValue) {
if (config.invert) {
config.invert = false;
} else {
config.invert = true;
}
ReInitiallizeArray = true;
}
void Stipples(int inValue) {
if (config.maxParticles != (int) inValue) {
println("Update: Stipple Count -> " + inValue);
ReInitiallizeArray = true;
}
}
void Min_Dot_Size(float inValue) {
if (config.minDotSize != inValue) {
println("Update: Min_Dot_Size -> " + inValue);
config.minDotSize = inValue;
config.maxDotSize = config.minDotSize* (1 + config.dotSizeFactor);
}
}
void Dot_Size_Range(float inValue) {
if (config.dotSizeFactor != inValue) {
println("Update: Dot Size Range -> " + inValue);
config.dotSizeFactor = inValue;
config.maxDotSize = config.minDotSize* (1 + config.dotSizeFactor);
}
}
void White_Cutoff(float inValue) {
if (config.cutoff != inValue) {
println("Update: White_Cutoff -> "+inValue);
config.cutoff = inValue;
RouteStep = 0; // Reset TSP path
}
}
void DoBackgrounds() {
if (showBG) {
canvas.image(img, 0, 0); // Show original (cropped and scaled, but not blurred!) image in background
} else {
if (config.invert) {
canvas.background(0);
} else {
canvas.background(255);
}
}
}
void OptimizePlotPath () {
println("Optimizing plot path...");
int temp;
StatusDisplay = "Optimizing plotting path";
Vec2D p1;
if (RouteStep == 0) {
float cutoffScaled = 1 - config.cutoff;
// Begin process of optimizing plotting route, by flagging particles that will be shown.
particleRouteLength = 0;
boolean particleRouteTemp[] = new boolean[config.maxParticles];
for (int i = 0; i < config.maxParticles; ++i) {
particleRouteTemp[i] = false;
int px = (int) particles[i].x;
int py = (int) particles[i].y;
if ((px >= imgblur.width) || (py >= imgblur.height) || (px < 0) || (py < 0)) {
continue;
}
float v = (brightness(imgblur.pixels[ py*imgblur.width + px ]))/255;
if (config.invert) {
v = 1 - v;
}
if (v < cutoffScaled) {
particleRouteTemp[i] = true;
particleRouteLength++;
}
}
particleRoute = new int[particleRouteLength];
int tempCounter = 0;
for (int i = 0; i < config.maxParticles; ++i) {
if (particleRouteTemp[i]) {
particleRoute[tempCounter] = i;
tempCounter++;
}
}
// These are the ONLY points to be drawn in the tour.
}
if (RouteStep < (particleRouteLength - 2)) {
// Nearest neighbor ("Simple, Greedy") algorithm path optimization:
int StopPoint = RouteStep + config.optimize; // 1000 steps per frame displayed; you can edit this number!
if (StopPoint > (particleRouteLength - 1)) {
StopPoint = particleRouteLength - 1;
}
for (int i = RouteStep; i < StopPoint; ++i) {
p1 = particles[particleRoute[RouteStep]];
int ClosestParticle = 0;
float distMin = Float.MAX_VALUE;
for (int j = RouteStep + 1; j < (particleRouteLength - 1); ++j) {
Vec2D p2 = particles[particleRoute[j]];
float dx = p1.x - p2.x;
float dy = p1.y - p2.y;
float distance = (float) (dx*dx+dy*dy); // Only looking for closest; do not need sqrt factor!
if (distance < distMin) {
ClosestParticle = j;
distMin = distance;
}
}
temp = particleRoute[RouteStep + 1];
// p1 = particles[particleRoute[RouteStep + 1]];
particleRoute[RouteStep + 1] = particleRoute[ClosestParticle];
particleRoute[ClosestParticle] = temp;
if (RouteStep < (particleRouteLength - 1)) {
RouteStep++;
} else {
println("Now optimizing plot path" );
}
}
} else {
// Initial routing is complete
// 2-opt heuristic optimization:
// Identify a pair of edges that would become shorter by reversing part of the tour.
for (int i = 0; i < config.testsPerFrame; i++) {
int indexA = floor(random(particleRouteLength - 1));
int indexB = floor(random(particleRouteLength - 1));
if (Math.abs(indexA - indexB) < 2) {
continue;
}
if (indexB < indexA) {
// swap A, B.
temp = indexB;
indexB = indexA;
indexA = temp;
}
Vec2D a0 = particles[particleRoute[indexA]];
Vec2D a1 = particles[particleRoute[indexA + 1]];
Vec2D b0 = particles[particleRoute[indexB]];
Vec2D b1 = particles[particleRoute[indexB + 1]];
// Original distance:
float dx = a0.x - a1.x;
float dy = a0.y - a1.y;
float distance = (float) (dx*dx+dy*dy); // Only a comparison; do not need sqrt factor!
dx = b0.x - b1.x;
dy = b0.y - b1.y;
distance += (float) (dx*dx+dy*dy); // Only a comparison; do not need sqrt factor!
// Possible shorter distance?
dx = a0.x - b0.x;
dy = a0.y - b0.y;
float distance2 = (float) (dx*dx+dy*dy); // Only a comparison; do not need sqrt factor!
dx = a1.x - b1.x;
dy = a1.y - b1.y;
distance2 += (float) (dx*dx+dy*dy); // Only a comparison; do not need sqrt factor!
if (distance2 < distance) {
// Reverse tour between a1 and b0.
int indexhigh = indexB;
int indexlow = indexA + 1;
while (indexhigh > indexlow) {
temp = particleRoute[indexlow];
particleRoute[indexlow] = particleRoute[indexhigh];
particleRoute[indexhigh] = temp;
indexhigh--;
indexlow++;
}
}
}
}
frameTime = (millis() - millisLastFrame) / 1000;
millisLastFrame = millis();
}
void doPhysics() {
// Iterative relaxation via weighted Lloyd's algorithm.
int temp;
int CountTemp;
if (VoronoiCalculated == false){
// Part I: Calculate voronoi cell diagram of the points.
StatusDisplay = "Calculating Voronoi diagram ";
// float millisBaseline = millis(); // Baseline for timing studies
// println("Baseline. Time = " + (millis() - millisBaseline) );
if (vorPointsAdded == 0) {
voronoi = new Voronoi(); // Erase mesh
}
temp = vorPointsAdded + 500; // This line: VoronoiPointsPerPass (Feel free to edit this number.)
if (temp > config.maxParticles) {
temp = config.maxParticles;
}
for (int i = vorPointsAdded; i < temp; i++) {
// Optional, for diagnostics:::
try {
voronoi.addPoint(new Vec2D(particles[i].x, particles[i].y ));
} catch (Exception e) {
continue;
}
vorPointsAdded++;
}
if (vorPointsAdded >= config.maxParticles) {
// println("Points added. Time = " + (millis() - millisBaseline) );
cellsTotal = (voronoi.getRegions().size());
vorPointsAdded = 0;
cellsCalculated = 0;
cellsCalculatedLast = 0;
RegionList = new Polygon2D[cellsTotal];
int i = 0;
for (Polygon2D poly : voronoi.getRegions()) {
RegionList[i++] = poly; // Build array of polygons
}
VoronoiCalculated = true;
}
} else{
// Part II: Calculate weighted centroids of cells.
// float millisBaseline = millis();
// println("fps = " + frameRate );
StatusDisplay = "Calculating weighted centroids";
// This line: CentroidsPerPass (Feel free to edit this number.)
// Higher values give slightly faster computation, but a less responsive GUI.
// Default value: 500
temp = cellsCalculated + config.centroidsPerPass;
if (temp > cellsTotal) {
temp = cellsTotal;
}
for (int i=cellsCalculated; i< temp; i++) {
float xMax = 0;
float xMin = config.canvasWidth;
float yMax = 0;
float yMin = config.canvasHeight;
float xt, yt;
Polygon2D region = clip.clipPolygon(RegionList[i]);
for (Vec2D v : region.vertices) {
xt = v.x;
yt = v.y;
if (xt < xMin) {
xMin = xt;
}
if (xt > xMax) {
xMax = xt;
}
if (yt < yMin) {
yMin = yt;
}
if (yt > yMax) {
yMax = yt;
}
}
float xDiff = xMax - xMin;
float yDiff = yMax - yMin;
float maxSize = max(xDiff, yDiff);
float minSize = min(xDiff, yDiff);
float scaleFactor = 1.0;
// Maximum voronoi cell extent should be between
// cellBuffer/2 and cellBuffer in size.
while (maxSize > cellBuffer) {
scaleFactor *= 0.5;
maxSize *= 0.5;
}
while (maxSize < (cellBuffer/2)) {
scaleFactor *= 2;
maxSize *= 2;
}
if ((minSize * scaleFactor) > (cellBuffer/2)) {
// Special correction for objects of near-unity (square-like) aspect ratio,
// which have larger area *and* where it is less essential to find the exact centroid:
scaleFactor *= 0.5;
}
float StepSize = (1/scaleFactor);
float xSum = 0;
float ySum = 0;
float dSum = 0;
float PicDensity = 1.0;
if (config.invert) {
for (float x=xMin; x<=xMax; x += StepSize) {
for (float y=yMin; y<=yMax; y += StepSize) {
Vec2D p0 = new Vec2D(x, y);
if (region.containsPoint(p0)) {
// Thanks to polygon clipping, NO vertices will be beyond the sides of imgblur.
PicDensity = 0.001 + (brightness(imgblur.pixels[ round(y)*imgblur.width + round(x) ]));
xSum += PicDensity * x;
ySum += PicDensity * y;
dSum += PicDensity;
}
}
}
} else {
for (float x=xMin; x<=xMax; x += StepSize) {
for (float y=yMin; y<=yMax; y += StepSize) {
Vec2D p0 = new Vec2D(x, y);
if (region.containsPoint(p0)) {
// Thanks to polygon clipping, NO vertices will be beyond the sides of imgblur.
PicDensity = 255.001 - (brightness(imgblur.pixels[ round(y)*imgblur.width + round(x) ]));
xSum += PicDensity * x;
ySum += PicDensity * y;
dSum += PicDensity;
}
}
}
}
if (dSum > 0) {
xSum /= dSum;
ySum /= dSum;
}
Vec2D centr;
float xTemp = (xSum);
float yTemp = (ySum);
if ((xTemp <= lowBorderX) || (xTemp >= hiBorderX) || (yTemp <= lowBorderY) || (yTemp >= hiBorderY)) {
// If new centroid is computed to be outside the visible region, use the geometric centroid instead.
// This will help to prevent runaway points due to numerical artifacts.
centr = region.getCentroid();
xTemp = centr.x;
yTemp = centr.y;
// Enforce sides, if absolutely necessary: (Failure to do so *will* cause a crash, eventually.)
if (xTemp <= lowBorderX) {
xTemp = lowBorderX + 1;
}
if (xTemp >= hiBorderX) {
xTemp = hiBorderX - 1;
}
if (yTemp <= lowBorderY) {
yTemp = lowBorderY + 1;
}
if (yTemp >= hiBorderY) {
yTemp = hiBorderY - 1;
}
}
particles[i].x = xTemp;
particles[i].y = yTemp;
cellsCalculated++;
}
// println("cellsCalculated = " + cellsCalculated );
// println("cellsTotal = " + cellsTotal );
if (cellsCalculated >= cellsTotal) {
VoronoiCalculated = false;
Generation++;
frameTime = (millis() - millisLastFrame)/1000;
millisLastFrame = millis();
}
}
}
/**
* https://forum.processing.org/two/discussion/3506/point-on-an-outer-circle-intercepted-by-a-line-perpendicular-to-the-tangent-of-an-inner-circle
* Calculate the points of intersection between a line and the
* circumference of a circle.
* [x0, y0] - [x1, y1] the line end coordinates
* [cx, cy] the centre of the circle
* r the radius of the circle
*
* An array is returned that contains the intersection points in x, y order.
* If the returned array is of length:
* 0 then there is no intersection
* 2 there is just one intersection (the line is a tangent to the circle)
* 4 there are two intersections
*/
public float[] line_circle_p(float x0, float y0, float x1, float y1, float cx, float cy, float r) {
float[] result = null;
float f = (x1 - x0);
float g = (y1 - y0);
float fSQ = f*f;
float gSQ = g*g;
float fgSQ = fSQ + gSQ;
float xc0 = cx - x0;
float yc0 = cy - y0;
float fygx = f*yc0 - g*xc0;
float root = r*r*fgSQ - fygx*fygx;
if (root > -ACCY) {
float[] temp = null;
int np = 0;
float fxgy = f*xc0 + g*yc0;
if (root < ACCY) { // tangent so just one point
float t = fxgy / fgSQ;
temp = new float[] {
x0 + f*t, y0 + g*t
};
np = 2;
}
else { // possibly two intersections
temp = new float[4];
root = sqrt(root);
float t = (fxgy - root)/fgSQ;
// if (t >= 0 && t <= 1) {
temp[np++] = x0 + f*t;
temp[np++] = y0 + g*t;
t = (fxgy + root)/fgSQ;
temp[np++] = x0 + f*t;
temp[np++] = y0 + g*t;
}
if (temp != null) {
result = new float[np];
System.arraycopy(temp, 0, result, 0, np);
}
}
return (result == null) ? new float[0] : result;
}
/**
* Create hatch lines within a circle determined by a line width
*
* x {float} center of circle on x axis
* y {float} center of circle on y axis
* d {float} diameter of circle
* angle {float} angle of hatching, 0-360
* line {float} width of line
**/
ArrayList<float[]> fillCircle (float x, float y, float d, float angle, float line) {
ArrayList<float[]> output = new ArrayList<float[]>();
float r = (d / 2.0);
float perpAngle = (angle + 90.0) % 360.0;
float perpRadian = radians(perpAngle);
float radian = radians(angle);
int lines = floor(d / line);
float perpX = 0;
float perpY = 0;
float startX = 0;
float startY = 0;
float endX = 0;
float endY = 0;
float testX = 0;
float testY = 0;
float[] intersect;
for (int i = -lines; i < lines; i++) {
perpX = x + ( ( (line / 2) * (i + 0.5) ) * cos(perpRadian));
perpY = y + ( ( (line / 2) * (i + 0.5) ) * sin(perpRadian));
testX = perpX + (d * cos(radian));
testY = perpY + (d * sin(radian));
intersect = line_circle_p(perpX, perpY, testX, testY, x, y, r);
if (intersect.length > 0) {
startX = intersect[0];
startY = intersect[1];
} else {
continue;
}
testX = startX - (d * cos(radian));
testY = startY - (d * sin(radian));
intersect = line_circle_p(perpX, perpY, testX, testY, x, y, r);
if (intersect.length > 0) {
endX = intersect[0];
endY = intersect[1];
} else {
continue;
}
if (dist(startX, startY, endX, endY) > line) {
float[] linePoints = { startX, startY, endX, endY };
output.add(linePoints);
}
}
return output;
}
void draw () {
int i = 0;
int temp;
int scaledDimension;
float dotScale = (config.maxDotSize - config.minDotSize);
float dotRad;
float dotDiam;
float cutoffScaled = 1 - config.cutoff;
float hatchAngle;
ArrayList<float[]> hatchLines;
canvas.beginDraw();
canvas.smooth();
canvas.noStroke();
if (ReInitiallizeArray) {
MainArraysetup();
ReInitiallizeArray = false;
}
doPhysics();
if ( showPath ) {
canvas.stroke(128, 128, 255); // Stroke color (blue)
canvas.strokeWeight (1);
for ( i = 0; i < (particleRouteLength - 1); ++i) {
Vec2D p1 = particles[particleRoute[i]];
Vec2D p2 = particles[particleRoute[i + 1]];
canvas.line(p1.x, p1.y, p2.x, p2.y);
}
}
if (config.invert) {
canvas.stroke(255);
} else {
canvas.stroke(0);
}
// NOT in pause mode. i.e., just displaying stipples.
if (cellsCalculated == 0) {
DoBackgrounds();
if (Generation == 0) {
TempShowCells = true;
}
if (showCells || TempShowCells) { // Draw voronoi cells, over background.
canvas.strokeWeight(1);
canvas.noFill();
if (config.invert && (showBG == false)) { // TODO -- if config.invert AND NOT background
canvas.stroke(100);
} else {
canvas.stroke(200);
}
// stroke(200);
i = 0;
for (Polygon2D poly : voronoi.getRegions()) {
//RegionList[i++] = poly;
gfx.polygon2D(clip.clipPolygon(poly));
}
}
if (showCells) {
// Show "before and after" centroids, when polygons are shown.
// Normal w/ Min & Max dot size
strokeWeight(config.minDotSize);
for ( i = 0; i < config.maxParticles; ++i) {
int px = (int) particles[i].x;
int py = (int) particles[i].y;
if ((px >= imgblur.width) || (py >= imgblur.height) || (px < 0) || (py < 0)) {
continue;
}
//Uncomment the following four lines, if you wish to display the "before" dots at weighted sizes.
//float v = (brightness(imgblur.pixels[ py*imgblur.width + px ]))/255;
//if (config.invert)
//v = 1 - v;
//strokeWeight (config.maxDotSize - v * dotScale);
canvas.point(px, py);
}
}
} else {
// Stipple calculation is still underway
if (TempShowCells) {
DoBackgrounds();
TempShowCells = false;
}
// stroke(0); // Stroke color
if (config.invert) {
canvas.stroke(255);
} else {
canvas.stroke(0);
}
if (config.line * config.canvasScalar >= 1.0) {
canvas.strokeWeight(config.line * config.canvasScalar);
} else {
canvas.strokeWeight(1.0);
}
if (!FileModeTSP && config.dot) {
canvas.noStroke();
if (config.invert) {
canvas.fill(255);
} else {
canvas.fill(0);
}
}
if (FileModeTSP) {
OptimizePlotPath();
canvas.background(config.invert ? 0 : 255);
canvas.beginShape();
for ( i = 0; i < particleRouteLength; ++i) {
Vec2D p1 = particles[particleRoute[i]];
float xTemp = p1.x;
float yTemp = p1.y;
canvas.vertex(xTemp, yTemp);
}
canvas.endShape();
} else {
for ( i = cellsCalculatedLast; i < cellsCalculated; i++) {
int px = (int) particles[i].x;
int py = (int) particles[i].y;
if ((px >= imgblur.width) || (py >= imgblur.height) || (px < 0) || (py < 0)) {
continue;
}
float v = (brightness(imgblur.pixels[ py*imgblur.width + px ]))/255;
if (config.invert) {
v = 1 - v;
}
if (v < cutoffScaled) {
dotDiam = (config.maxDotSize - v * dotScale) * config.canvasScalar;
if (dotDiam < config.minDotSize) {
dotDiam = config.minDotSize;
}
canvas.ellipse(px, py, dotDiam, dotDiam);
if (!config.dot && config.fill) {
hatchAngle = config.fillRandom ? random(0.0, 360.0) : config.fillAngle;
hatchLines = fillCircle(px, py, dotDiam, hatchAngle, config.line * config.canvasScalar);
if (hatchLines.size() > 0) {
for (float[] linePoints : hatchLines) {
canvas.line(linePoints[0], linePoints[1], linePoints[2], linePoints[3]);
}
}
}
}
}
cellsCalculatedLast = cellsCalculated;
}
}
canvas.endDraw();
if (config.display) {
if (mainRatio >= windowRatio) {
scaledDimension = round((float) height * mainRatio);
image(canvas, (width - scaledDimension) / 2, 0, scaledDimension, height);
} else {
scaledDimension = round((float) width / mainRatio);
image(canvas, 0, (height - scaledDimension) / 2, width, scaledDimension);
}
}
if (Generation != lastGeneration) {
if (!TempShowCells && config.outputImage != null) {
canvas.save(config.outputImage);
}
println("Generation completed: " + Generation);
println("Generation time: " + frameTime + " s");
lastGeneration = Generation;
}
if (ErrorDisp) {
println(ErrorDisplay);
if ((millis() - ErrorTime) > 8000) {
ErrorDisp = false;
}
} else {
if (!lastStatusDisplay.equals(StatusDisplay)) {
println(StatusDisplay);
lastStatusDisplay = StatusDisplay;
}
}
if (Generation == config.maxGenerations) {
SaveNow = 1;
}
if (SaveNow > 0 && config.display && config.outputSVG == null) {
SAVE_SVG();
return;
}
if (SaveNow > 0 && config.outputSVG != null) {
if (!FileModeTSP) {
OptimizePlotPath();
}
StatusDisplay = "Saving SVG File";
FileOutput = header;
String rowTemp;
for (i = 0; i < FileOutput.length; i++) {
FileOutput[i] = FileOutput[i].replace("{{WIDTH}}", str(config.canvasWidth));
FileOutput[i] = FileOutput[i].replace("{{HEIGHT}}", str(config.canvasHeight));
}
//Need to get some background on this.
//what are these magic numbers?
float SVGscale = 1.0; //(800.0 / (float) config.canvasHeight);
//not centering the image is more controllable
int xOffset = 0; //(int) (1536 - (SVGscale * config.canvasWidth / 2));
int yOffset = 0; //(int) (1056 - (SVGscale * config.canvasHeight / 2));
if (FileModeTSP) {
// Plot the PATH between the points only.
println("Saving TSP File (SVG)");
println(config.outputSVG);
// Path header::
rowTemp = "<path style=\"fill:none;stroke:black;stroke-width:"+ config.line +";stroke-linejoin:round;stroke-linecap:round;\" d=\"M ";
FileOutput = append(FileOutput, rowTemp);
for ( i = 0; i < particleRouteLength; ++i) {
Vec2D p1 = particles[particleRoute[i]];
float xTemp = SVGscale * p1.x + xOffset;
float yTemp = SVGscale * p1.y + yOffset;
if (i == 0) {
rowTemp = xTemp + " " + yTemp + "\r";
} else {
rowTemp = "L " + xTemp + " " + yTemp + "\r";
}
FileOutput = append(FileOutput, rowTemp);
}
FileOutput = append(FileOutput, "\" />"); // End path description
} else {
println("Saving Stipple File (SVG)");
println(config.outputSVG);
for ( i = 0; i < particleRouteLength; ++i) {
Vec2D p1 = particles[particleRoute[i]];
int px = floor(p1.x);
int py = floor(p1.y);
float v = (brightness(imgblur.pixels[ py*imgblur.width + px ])) / 255;
if (config.invert) {
v = 1 - v;
}
dotRad = (config.maxDotSize - v * dotScale) / 2;
float xTemp = SVGscale * p1.x + xOffset;
float yTemp = SVGscale * p1.y + yOffset;
if (config.dot) {
rowTemp = "<path d=\"M " + xTemp + "," + yTemp + " L " + (xTemp + 0.01 ) + "," + yTemp + "\" style=\"fill:none;stroke:black;stroke-width:" + dotRad + ";\"/>";
} else {
rowTemp = "<circle cx=\"" + xTemp + "\" cy=\"" + yTemp + "\" r=\"" + dotRad +
"\" style=\"fill:none;stroke:black;stroke-width:1;\"/>";
// Typ: <circle cx="1600" cy="450" r="3" style="fill:none;stroke:black;stroke-width:2;"/>
}
if (!config.dot && config.fill) {
hatchAngle = config.fillRandom ? random(0.0, 360.0) : config.fillAngle;
hatchLines = fillCircle(xTemp, yTemp, dotRad * 2.0, hatchAngle, config.line);
if (hatchLines.size() > 0) {
for (float[] linePoints : hatchLines) {
rowTemp += "<line x1=\"" + linePoints[0] + "\" y1=\"" + linePoints[1] + "\" x2=\"" + linePoints[2] + "\" y2=\"" + linePoints[3] + "\" style=\"fill:none;stroke:black;stroke-width:1;\"/>";
}
}
}
FileOutput = append(FileOutput, rowTemp);
}
}
// SVG footer:
FileOutput = append(FileOutput, "</g></g></svg>");
saveStrings(config.outputSVG, FileOutput);
//FileModeTSP = false; // reset for next time
if (FileModeTSP) {
ErrorDisplay = "TSP Path .SVG file Saved";
} else {
ErrorDisplay = "Stipple .SVG file saved ";
}
ErrorTime = millis();
ErrorDisp = true;
} else if (SaveNow > 0 && config.outputSVG == null) {
println("Exiting without exporting SVG");
}
if (SaveNow > 0) {
exit();
}
}
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