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Title	The Chaos Game! – Visualization by DY
ID	4603272714780672
Created	11 years ago, 1409005292368
Updated	11 years ago, 1409151776275
Code	// THE CHAOS GAME // A Visualization by DY // // A simple way to construct a fractal such as a // Sierpinski Triangle! // // en.wikipedia.org/wiki/Sierpinski_triangle#Chaos_game /*HOW IT WORKS: * Define three vertices that make a triangle. * Make a point within the triangle. * Make another point halfway between the previous point and one of the vertices of the triangle. * Repeat the previous step. * * The result is a Sierpinski triangle. Enjoy! / // Change the two following variables for different results! Can you find another fractal? // How far between the previous point and a vertex should the new point go? var newPointDistanceFactor = 1/2; // The points that make up the triangle. Change the numbers, and even try adding some vertices! var vertices = [ new PVector(200, 30), new PVector(40, 315), new PVector(360, 315) ]; frameRate(0); var mouseIsOver; mouseOver = function(){ mouseIsOver = true; }; mouseOut = function(){ mouseIsOver = false; }; var introTextAlpha = 255; var animationDelay = 100; var maxAnimationDelay = 150; var minAnimationDelay = -1; var points = []; var previousPoint; var goToVertex; var currentPoint; var MyPoint = function(pos, maxSize, minSize, shrinkSpeed, fromColor, toColor, lerpColorSpeed){ this.pos = pos; this.max = maxSize; this.min = minSize; this.size = maxSize; this.shrinkSpeed = shrinkSpeed; this.fromColor = fromColor; this.toColor = toColor; this.lerpColor = 0; this.lerpColorSpeed = lerpColorSpeed; }; MyPoint.prototype.update = function(){ this.size = max(this.size - this.shrinkSpeed, this.min); this.lerpColor = min(this.lerpColor + this.lerpColorSpeed, 1); }; MyPoint.prototype.draw = function(){ stroke(lerpColor(this.fromColor, this.toColor, this.lerpColor)); strokeWeight(this.size); point(this.pos.x, this.pos.y); }; var newCurrentPoint = function(pos){ return new MyPoint(pos, 24, 12, 0.8, color(92, 222, 255), color(197, 127, 255), 0.06); }; var newPreviousPoint = function(pos){ return new MyPoint(pos, 12, 4, 0.3, color(197, 127, 255), color(112, 93, 0), 0.015); }; var update = function(){ if(points.length){ previousPoint = newPreviousPoint(points[points.length - 1]); goToVertex = vertices[floor(random(vertices.length))]; currentPoint = newCurrentPoint( new PVector( previousPoint.pos.x + (goToVertex.x - previousPoint.pos.x) newPointDistanceFactor, previousPoint.pos.y + (goToVertex.y - previousPoint.pos.y) * newPointDistanceFactor ) ); points.push(currentPoint.pos); } }; var render = function() { cursor(); noStroke(); fill(255, 218, 107, 200); rect(0, 0, 401, 401); //Triangle Vertices stroke(255, 94, 223); strokeWeight(10); beginShape(); for (var p in vertices){ point(vertices[p].x, vertices[p].y); vertex(vertices[p].x, vertices[p].y); } fill(255, 255, 255, 50); noStroke(); endShape(); if(points.length){ //All the points stroke(112, 93, 0); strokeWeight(3); for(var p in points){ point(points[p].x, points[p].y); } //Line between old vertex and triangle vertex if(points.length > 1){ stroke(255); strokeWeight(2); line(goToVertex.x, goToVertex.y, previousPoint.pos.x, previousPoint.pos.y); //Previous Point previousPoint.update(); previousPoint.draw(); } //Current Point currentPoint.update(); currentPoint.draw(); }else{ if(mouseIsOver && mouseY < 355){ noCursor(); //Cursor stroke(255, 0, 0); strokeWeight(10 + sin(frameCount * 8) * 5); point(mouseX, mouseY); introTextAlpha -= 10; }else{ introTextAlpha += 10; } introTextAlpha = constrain(introTextAlpha, 0, 255); //Beginning Text textAlign(CENTER, CENTER); fill(120, 95, 20, introTextAlpha); textFont(loadFont("Avenir Bold", 0), 30); textSize(42); text("The Chaos Game", 200, 130); textFont(loadFont("Avenir", 0), 30); textSize(20); text("A Visualization by DY", 200, 175); fill(168, 134, 30, introTextAlpha); textSize(18); text("Click anywhere to make the first point!", 200, 270 + sin(frameCount * 2) * 5); } }; render(); var ui = function(){ fill(255, 255, 255, 100); noStroke(); rect(0, 355, 400, 45); fill(163, 145, 93); textSize(10); textAlign(LEFT, CENTER); text("Distance Factor: " + newPointDistanceFactor.toFixed(2), 5, 345); textSize(9); textAlign(RIGHT, CENTER); text("(To get to the next point, we travel " + newPointDistanceFactor.toFixed(2) + " the distance to a vertex.)", 395, 345); fill(82); stroke(82); textAlign(CENTER, CENTER); textSize(9); text("DELAY", 25, 372); textSize(14); text(animationDelay === -1 ? -5 : animationDelay, 25, 384); fill(255, 220, 115); strokeWeight(2); line(55, 380, 380, 380); ellipse(animationDelay325/(maxAnimationDelay - minAnimationDelay) + 55, 380, 15, 15); if(mouseIsPressed && mouseY > 365){ animationDelay = (mouseX - 55)/325(maxAnimationDelay - minAnimationDelay); animationDelay = round(constrain(animationDelay, minAnimationDelay, maxAnimationDelay)); } }; draw = function() { if(animationDelay === -1){ for(var i = 0; i < 5; i++){ update(); } }else if(animationDelay === 0 \|\| frameCount % animationDelay === 0){ update(); } render(); ui(); }; mouseClicked = function(){ if(!points.length && mouseY < 355){ currentPoint = newCurrentPoint( new PVector(mouseX, mouseY) ); points.push(currentPoint.pos); render(); } };
Folds
Fork	false
Key	ag5zfmtoYW4tYWNhZGVteXIXCxIKU2NyYXRjaHBhZBiAgOCX79SWCAw
Votes	244
Spin-Offs	27
Type	PJS
Width	400
Height	400
User Flagged	false
Origin Scratchpad	null
Hidden From Hotlist	false
Restricted Posting	false
By Child	false
Author Nick	DY
Author Name	darrylyeo
Author ID	kaid_436187987535602224909820
Author Profile Access	COACH

Archive Data

Added	6 months ago, 1739364502884
Updated	6 months ago, 1739364510841
Source Deleted	unknown