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generators.js
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generators.js
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// Edit this file to add your cloud design!
// Just write a function with a unique name like:
// function perlinNoiseCloud() {}
// and then add a line of code that "registers" it:
// register(perlinNoiseCloud, "Perlin Noise Cloud", "Daniel Shiffman");
// Here's an example below!
// Example rounded rectangle cloud
function rectangle() {
// Draw your cloud here
rect(50, 50, width - 100, height - 100, 50);
// Return an internal rectangle that it is safe to draw text within. Of the
// form [top_left, top_right, width, height]
return [100, 100, width - 200, height - 200];
}
// Register your function with register(function, style_name, author_name)
register(rectangle, "Example", "example");
/* ------ Add your custom cloud generators below! ------ */
function ellipseCloud() {
const circleRadius = width / 8;
const cloudWidth = width - 100 - circleRadius;
const cloudHeight = height - 100 - circleRadius;
// Getting number of circles based on the width of the cloud and the cloud radius size.
const circleAmount = cloudWidth / (circleRadius * 0.5) * 2;
push();
translate(width / 2, height / 2);
// Drawing outside circles (with stroke)
for (let i = 0; i < circleAmount; i++) {
drawOuterCirc(i);
}
// Drawing inner circles which hide the inner stroke of the outer circles
for (let i = 0; i < circleAmount; i++) {
drawInnerCirc(i);
}
// Filling the middle with white for name
noStroke();
ellipse(0, 0, cloudWidth, cloudHeight);
pop();
function drawOuterCirc(num) {
const angle = TWO_PI / circleAmount * num;
const circleX = cloudWidth / 2 * cos(angle);
const circleY = cloudHeight / 2 * sin(angle);
push();
translate(circleX, circleY);
ellipse(0, 0, circleRadius, circleRadius);
pop();
}
function drawInnerCirc(num) {
const angle = TWO_PI / circleAmount * num;
// * 0.99 to still show the stroke of the outer circles
const circleX = cloudWidth / 2 * cos(angle) * 0.99;
const circleY = cloudHeight / 2 * sin(angle) * 0.99;
push();
noStroke();
translate(circleX, circleY);
ellipse(0, 0, circleRadius, circleRadius);
pop();
}
return [100, 100, width - 200, height - 200];
}
register(ellipseCloud, "Ellipse Cloud", "Raqbit");
function marmsCloud() {
noStroke();
var a = 400;
var b = 200;
var xc = 200;
var yc = 100;
var n = random(80,120);
for(var i = 0; i < n; i++){
var r = 2*random(30,50);
var rx = r + random(-3,5);
var ry = r + random(-3,5);
var x = random(-a,a);
var y = random(-b,b);
while(((x-xc)/a)*((x-xc)/a) + ((y-yc)/b)*((y-yc)/b) > 1){
var x = random(-a,a);
var y = random(-b,b);
}
fill(210,210,210);
rect(xc+x,yc+y,rx,ry,10,10);
fill(255,255,255);
rect(xc+x+15,yc+y-15,rx,ry,10,10);
}
return [30,30,2*a-60,2*b-60];
}
register(marmsCloud, "Marms Cloud", "Henrique Martinez Rocamora");
// Unicode Cloud by Sergio Fernández
function unicodeCloud() {
var size = floor(min(width, height * 2));
textSize(size);
var widthOfCloud = size;
var heightOfCloud = widthOfCloud * 0.37;
var textX = (width - widthOfCloud) / 2;
var textY = height - (height - heightOfCloud) / 2;
textAlign(LEFT, BASELINE);
text("☁", textX, textY);
return [
textX + (widthOfCloud * 0.25),
textY - (heightOfCloud * 0.7),
widthOfCloud * 0.6,
heightOfCloud * 0.6
];
}
register(unicodeCloud, "Unicode", "Sergio Fernández");
function flatBottomCloud() {
let radius = width / 4; // I don't really know where I messed up but for now just don't change the radius...
let cloudWidth = width - radius - 100;
let cloudHeight = height - radius - 100;
let circleCount = cloudWidth / (radius*0.5);
push();
translate(width / 2, height / 1.75);
ellipse(0,radius/4,cloudWidth,radius);
for (let i = 0; i < circleCount; i++) {
let angle = -PI / circleCount * i;
let x = cloudWidth / 2 * cos(angle);
let y = cloudHeight / 2 * sin(angle);
ellipse(x, y, radius, radius);
}
noStroke();
ellipse(0, -radius/5, cloudWidth+radius/2, cloudHeight+radius/10);
pop();
return [100, 200, width - 200, height - 400];
}
register(flatBottomCloud, "Flat Bottom", "Merijn_DH");
function kazakhCloud(radius = 200, min = 8, max = 10) {
// This function draws a cloud which margins are inside of a "circle" with
// a given radius. The circle is not perfect, its boundaries may vary
// according to the value offset. Number of "peak" points is determined via
// min and max values.
let points = [];
let offset = radius / 5;
let numPoints = Math.round(random(min, max));
for (let i = 0; i < numPoints; i++) {
// generating "peak" points of a cloud away from the center
let angle = (TWO_PI / numPoints) * i;
let away;
while (true) {
away = Math.round(random(radius) + offset);
if (Math.abs(away - radius) <= offset) {
break;
}
}
let x = width / 2 + away * Math.cos(angle);
let y = height / 2 - away * Math.sin(angle);
points.push([x, y]);
}
noStroke();
fill("#FFF");
ellipse(width / 2, height / 2, 2.3*radius, 2.3*radius);
for (let i = 0; i < points.length; i++) {
// drawing arcs with the center inbetween every pair of points
let center = [];
let circleRadius;
if (i == points.length - 1) {
center = [(points[i][0] + points[0][0]) / 2, (points[i][1] + points[0][1]) / 2];
circleRadius = dist(points[i][0], points[i][1], points[0][0], points[0][1]);
} else {
center = [(points[i][0] + points[i+1][0]) / 2, (points[i][1] + points[i+1][1]) / 2];
circleRadius = dist(points[i][0], points[i][1], points[i+1][0], points[i+1][1]);
}
// finding slope and y-intercept for a line between center and point
let mCircle = (center[1] - points[i][1]) / (center[0] - points[i][0]);
let bCircle = center[1] - mCircle * center[0];
let x1Origin = (0 - bCircle) / mCircle; // finding line's intercept with X-axis
let x2Origin = center[0]; // another line is a projection of previous on X
// finally getting the angle using found 2 lines and trigonometry
let angle = Math.acos(dist(x2Origin, 0, x1Origin, 0) / dist(center[0], center[1], x1Origin, 0));
// drawing arcs with right angle offset according to the placement of the center
strokeWeight(10);
stroke("#000");
fill("#FFF");
if (center[0] > width / 2 && center[1] < height / 2) {
arc(center[0], center[1], circleRadius, circleRadius, PI+angle, angle);
} else if (center[0] < width / 2 && center[1] < height / 2) {
arc(center[0], center[1], circleRadius, circleRadius, PI-angle, -angle);
} else if (center[0] < width / 2 && center[1] > height / 2) {
arc(center[0], center[1], circleRadius, circleRadius, angle, PI+angle);
} else if (center[0] > width / 2 && center[1] > height / 2) {
arc(center[0], center[1], circleRadius, circleRadius, -angle, PI-angle);
} else if (center[0] == width / 2 && center[1] < height / 2) {
arc(center[0], center[1], circleRadius, circleRadius, PI, 0);
} else if (center[0] == width / 2 && center[1] > height / 2) {
arc(center[0], center[1], circleRadius, circleRadius, 0, PI);
} else if (center[0] < width / 2 && center[1] == height / 2) {
arc(center[0], center[1], circleRadius, circleRadius, HALF_PI, PI + HALF_PI);
} else if (center[0] > width / 2 && center[1] == height / 2) {
arc(center[0], center[1], circleRadius, circleRadius, PI + HALF_PI, HALF_PI);
}
}
let rectSide = Math.round(Math.sqrt(2) * (radius - offset));
return [width/2 - rectSide/2, height/2 - rectSide/2, radius+offset, radius+offset];
}
register(kazakhCloud, "Cloud from Kazakhstan", "Ilyas triple-o-zero");
function fluffyCloud(){
var cloudradius = 0.7*(width/2);
var angle = PI/2;
fill(255);
while(angle<(2.5*PI)){
ellipse(width/2+cos(angle)*cloudradius,height/2+sin(angle)*0.5*cloudradius,(width/2-sin(angle)*cloudradius)/3);
angle += (width/2-sin(angle)*cloudradius)/(3.9*cloudradius);
}
noStroke();
ellipse(width/2-4,height/2-cloudradius*0.075,cloudradius*2.4,cloudradius*1.24);
stroke(0);
return [120, 180, width - 240, height - 400];
}
register(fluffyCloud, "Fluffy", "egg303");
//Draw a nice round cloud by Brandon Blaschke
function proudRoundCloud() {
//Amount of circles in the cloud
let circleAmou = 15;
//Radius for surrounding clouds
let radius = 200;
strokeWeight(5);
fill(255);
//Position and set up drawing
push();
angleMode(DEGREES);
translate(width / 2, height / 2);
//Make outer edge of cloud by going in a circle around the name
for(let i = 0; i < circleAmou; i++) {
let angle = map(i, 0, circleAmou, 0, 360);
let x = 400 * cos(angle);
let y = 250 * sin(angle);
ellipse(x,y, radius, radius);
}
//Fill the inside with white circles to fill it
noStroke();
for(let i = 0; i < circleAmou; i++) {
let angle = map(i, 0, circleAmou, 0, 360);
let x = 200 * cos(angle);
let y = 200 * sin(angle);
ellipse(x,y, radius, radius);
}
//Fill the middle section
ellipse(0,0,950, 550);
pop();
return [100, 100, width - 200, height - 200];
}
register(proudRoundCloud, "Proud Round Cloud", "Brandon Blaschke");
// rndCloud
// Generates a cloud, by drawing ellipses of random width and height on locus of a regular ellipse
// Couldn't add a nice looking stroke to the cloud :( TODO: Add a beautiful stroke
function rndCloud(){
// Randomess - The main variable of the algorithm.
// Randomness is inversely proportional to time taken to generate
// Randomness is directly proportional to beauty (depends on viewers taste)
const randomness = random(20,100);
const r = width/2 - randomness;
let x, y;
push();
translate(width / 2, height / 2);
angleMode(DEGREES)
noStroke();
for(let i = 0; i <=360;)
{
x = r*cos(i);
y = 0.5* r*sin(i);
w = random(1,2) * randomness;
h = random(1,2) * randomness;
ellipse(x,y,w,h); //Draw the random ellipses
ellipse(0,0,r*2,r); //Draw main ellipse
i += randomness / 10;
}
pop();
return [100, 100, width - 200, height - 200];
}
register(rndCloud, "RNDCloud", "Haider Ali Punjabi (@haideralipunjabi)")
function cartoonCloud() {
//Inspired by the cloud drawing from Processing Day organizer Taeyoon Choi
function getRandMiniA() {
return random(0, PI/24);
}
let radius = height/2.4;
let angles = [0];
angleMode(RADIANS);
push();
translate(width/2, height/2);
//Fills the array with random angles that progressivly get bigger up until 2*PI
//This creates the bigger and smaller cloud blobs, making it feel more natural
let totalA = 0;
while (totalA < 2*PI) {
let a = random(PI/20, PI/6);
if (totalA + a > 2*PI) {
a = 2*PI - totalA;
}
totalA += a;
angles.push(totalA);
}
//We first draw the cloud using begin/endShape() so we can fill() it
noStroke();
fill(255);
beginShape();
vertex(2*radius*cos(angles[0]), 2*radius*sin(angles[0]));
for (let i = 0; i < angles.length; i++) {
let a = angles[i];
let deltaA = angles[(i+1)%angles.length] - a;
if (deltaA < 0)deltaA+=2*PI;
bezierVertex(
2*1.2*radius*cos(a + deltaA/3), 1.2*radius*sin(a + deltaA/3),
2*1.2*radius*cos(a + 2*deltaA/3), 1.2*radius*sin(a + 2*deltaA/3),
2*radius*cos(angles[(i+1)%angles.length]), radius*sin(angles[(i+1)%angles.length])
);
}
endShape();
//Now we draw the cloud 4 times, each time with a random offset
//This gives the cloud a cartoony feeling
stroke(0, 200);
for (let l = 0; l < 4; l++) {
for (let i = 0; i < angles.length; i++) {
//Draw a bezier curve with a random stroke, a touch of alpha and some RNG
let a = angles[i];
let deltaA = angles[(i+1)%angles.length] - a;
if (deltaA < 0){deltaA+=2*PI;}
strokeWeight(random(10,14));
bezier(
2*radius*cos(a), radius*sin(a),
2*1.2*radius*cos(a + deltaA/3- getRandMiniA()), 1.2*radius*sin(a + deltaA/3- getRandMiniA()),
2*1.2*radius*cos(a + 2*deltaA/3+ getRandMiniA()), 1.2*radius*sin(a + 2*deltaA/3+ getRandMiniA()),
2*radius*cos(angles[(i+1)%angles.length]), radius*sin(angles[(i+1)%angles.length])
);
}
}
pop();
return [width/2 - 2*radius/1.4, height/2 - radius / 1.4, 4 * radius / 1.4, 2 * radius / 1.4];
}
register(cartoonCloud, "Cartoon cloud", "@JeBoyJurriaan");
function unstableCloud() {
// Utils
const DEBUG = false
const debugColor = (alpha=150) => color(random(255), random(255), random(255), alpha)
const cloudColor = (alpha=255) => color(255, alpha)
const createCloud = (pos, d) => {
return {pos: pos, d: d}
}
const drawCanvasBackground = () => {
noStroke()
fill(0,0,0,25)
rect(0, 0, width, height)
}
const drawCloudBase = (pos, w, h) => {
noStroke()
DEBUG ? fill(debugColor()) : fill(cloudColor())
rect(pos.x, pos.y, w, h)
}
const drawPuffyCloud = (cloud) => {
noStroke()
DEBUG ? fill(debugColor()) : fill(cloudColor())
ellipse(cloud.pos.x, cloud.pos.y, cloud.d, cloud.d)
}
// const drawGuidLine = () =>
const getArcCenter = (A, B, C) => {
// Mid-points AB and BC
const midAB = A.copy().add(B).div(2)
const midBC = B.copy().add(C).div(2)
// Slopes AB and BC
const slopeAB = (B.y-A.y)/(B.x-A.x)
const slopeBC = (C.y-B.y)/(C.x-B.x)
// Perpendicular lines runing through mid-points AB and BC
const slopePerpAB = -Math.pow(slopeAB, -1)
const slopePerpBC = -Math.pow(slopeBC, -1)
// determine b to get linear equation standard form y = mx + b
const bAB = midAB.y - slopePerpAB * midAB.x
const bBC = midBC.y - slopePerpBC * midBC.x
// get intersection point
const x = (bBC - bAB)/(slopePerpAB - slopePerpBC)
const y = slopePerpBC * x + bBC
if(DEBUG) {
stroke(255)
strokeWeight(5)
line(midAB.x, midAB.y, x, y)
line(midBC.x, midBC.y, x, y)
line(B.x, B.y, C.x, C.y)
line(B.x, B.y, A.x, A.y)
noStroke()
fill(0, 200)
ellipse(A.x, A.y, 20, 20)
ellipse(B.x, B.y, 20, 20)
ellipse(C.x, C.y, 20, 20)
ellipse(x, y, 20, 20)
}
return createVector(x, y)
}
// Variable factores
const sizeFactor = 1
const rndBaseHeight = 250 + random(50)
const rndArcCenterHeight = -25 + random(75)
const nPuffyClouds = Math.round(6+random(1))
const puffyCloudsBaseSize = 300 * sizeFactor
const puffyCloudsSizeOffset = 100 * sizeFactor
// Cloud base
const baseWidth = 1100 * sizeFactor
const baseHeight = rndBaseHeight * sizeFactor
const baseCenter = createVector(width*.5, height*.6)
const basePos = createVector(baseCenter.x - baseWidth *.5, baseCenter.y - baseHeight *.5)
// Puffy clouds
let puffyClouds = []
const puffyDiameter = baseHeight
const puffyRadius = puffyDiameter*.5
const puffyPos = createVector(basePos.x, basePos.y + baseHeight - puffyRadius)
const puffyLeft = createCloud(puffyPos, puffyDiameter)
const puffyRight = createCloud(puffyPos.copy().add(baseWidth, 0), puffyDiameter)
puffyClouds.push(puffyLeft)
puffyClouds.push(puffyRight)
// Create arc from 3 points
const A = puffyLeft.pos.copy().sub(puffyRadius*.5, 0)
const B = baseCenter.copy().sub(0, baseHeight*.5).sub(0, rndArcCenterHeight)
const C = puffyRight.pos.copy().add(puffyRadius*.5, 0)
const arcCenter = getArcCenter(A, B, C)
const arcRadius = B.dist(arcCenter)
const arcDiameter = arcRadius * 2
const arcOffsetAngle = atan(-(C.y - arcCenter.y) / (C.x - arcCenter.x))
const arcTotalAngle = PI - 2*arcOffsetAngle
const arcAngleStep = arcTotalAngle/(nPuffyClouds-1)
for(let i = 1; i < nPuffyClouds-1; i++) {
const x = cos(i*(arcAngleStep)+arcOffsetAngle)*arcRadius
const y = -sin(i*(arcAngleStep)+arcOffsetAngle)*arcRadius
const sizeOffset = map(y, -sin(arcOffsetAngle) * arcRadius, -arcRadius, 0, puffyCloudsSizeOffset, true)
const r = puffyCloudsBaseSize + random(sizeOffset)
puffyClouds.push(createCloud(createVector(x, y).add(arcCenter), r))
}
// Draw
if(DEBUG) {
drawCanvasBackground()
stroke(0)
noFill()
arc(arcCenter.x, arcCenter.y, arcDiameter, arcDiameter, PI+arcOffsetAngle, -arcOffsetAngle)
}
drawCloudBase(basePos, baseWidth, baseHeight)
puffyClouds.forEach(drawPuffyCloud)
return [basePos.x, basePos.y - baseHeight*.1, baseWidth, baseHeight]
}
register(unstableCloud, "A Cloud", "@unstablectrl")
function someCloud(){
angleMode(DEGREES);
translate(width/2, height/2);
let fullDeg = 360,
sz = 2;
noStroke();
fill(255)
arc(0, 0, 400 * sz, 310 * sz, 0, fullDeg)
for(let i = 0;i <= fullDeg; i++){
let s = 200 * sz * sin(i);
let c = 150 * sz * cos(i);
arc(s, c, random(100), random(100), 0, fullDeg);
}
return [-350, -200, width - 200, height -200];
}
register(someCloud, "Some Cloud", "Indmind");
// arbitrary cloud by Hung
function arbitraryCloud(){
let cloud_x = 50;
let cloud_y = 50;
let cloud_width = width - cloud_x * 2;
let cloud_height = height - cloud_y * 2;
let cloud_center_size = {
"width" : cloud_width - 300,
"height" : cloud_height - 300
};
let cloud_center = {
x: (width - cloud_center_size.width) / 2,
y: (height - cloud_center_size.height) / 2
};
ellipseMode(CORNER);
noStroke();
// center area for drawing text
ellipse(
cloud_center.x,
cloud_center.y,
cloud_center_size.width,
cloud_center_size.height
);
// generate random sub clouds
// sub clouds infos
let number_random_sub_clouds = 10;
let smallest_sub_cloud_width = 200;
let smallest_sub_cloud_height = 200;
for(let i = 0; i < number_random_sub_clouds; i++){
let rand_width = random(smallest_sub_cloud_width, cloud_width - 100);
let rand_height = random(smallest_sub_cloud_height, cloud_height - 100);
let rand_x = random(cloud_x + 10, cloud_width - rand_width);
let rand_y = random(cloud_y + 10, cloud_height - rand_height);
ellipse(rand_x, rand_y, rand_width, rand_height);
}
return [cloud_center.x, cloud_center.y, cloud_center_size.width, cloud_center_size.height];
}
register(arbitraryCloud, "Arbitrary cloud", "Hung Nguyen (fb.com/ZeroXCEH)");
function shadowCloud() {
// A puffy cloud with a shadow by Arjen Klaverstijn [email protected]
// https://github.com/arjhun
angleMode(DEGREES);
let segments = 0,
radius = 600,
start = random(0, 360),
end = start + 360,
min = 20,
max = 40,
puff = max * 5,
cPoints = [];
for (let i = start; i < end;) {
segments = random(min, max);
//next segment
let nextV = i + segments;
// lets fill up the last segment with a reasonable one
if (end - nextV < max - (max - min / 2)) nextV = end;
//create coordinates for bezier segments
cPoints.push(
[radius * sin(i),
radius / 3 * cos(i),
(radius + puff) * sin(i),
(radius / 3 + puff) * cos(i),
(radius + puff) * sin(nextV),
(radius / 3 + puff) * cos(nextV),
radius * sin(nextV),
radius / 3 * cos(nextV)
]);
i += segments
//if next vertex is at the end stop drawing
if (nextV == end) break;
}
function drawCloud(offSet) {
push();
translate(width / 2+offSet, height / 2+offSet);
beginShape();
for (let c = 0; c < cPoints.length; c++) {
vertex(cPoints[c][0] , cPoints[c][1] );
bezierVertex(cPoints[c][2] , cPoints[c][3] , cPoints[c][4] , cPoints[c][5] , cPoints[c][6] , cPoints[c][7] );
}
endShape();
pop();
}
//draw the actuall clouds
fill(0); // random shadow
drawCloud(random(20,100));
fill(255);
drawCloud(0);
return [width/2-radius, height/2 -(radius/3), radius*2, (radius/3)*2];
}
register(shadowCloud, "Cloud with Shadow", "Arjen Klaverstijn (@aklaverstijn)");
function CircularCloud() {
// Draw big cloud parts
fill(255, 255, 255, 90);
for(let i = 0; i < 500; i++){
fill(255, 255, 255, 50);
//the bigger i; the more centered are the circles and the less likely they are outlined
let offsetVec = p5.Vector.random2D();
let scaleX = random(-600, 600) / (i * 0.001+1);
let scaleY = random(-300, 300) / (i * 0.001+1);
offsetVec.x *= scaleX;
offsetVec.y *= scaleY;
let outside = offsetVec.mag();
if(random(700) < outside && random() > 0.7){
strokeWeight(1);
//fill(200, 0, 0);
}
else strokeWeight(0);
ellipse(width/2 + offsetVec.x, height/2 + offsetVec.y, random(50, width/4));
}
// Draw small cloud parts
fill(255, 255, 255, 90);
for(let i = 0; i < 500; i++){
fill(255, 255, 255, 50);
let offsetVec = p5.Vector.random2D();
let scaleX = random(-500, 500) / (i * 0.001+1);
let scaleY = random(-250, 250) / (i * 0.001+1);
offsetVec.x *= scaleX;
offsetVec.y *= scaleY;
let outside = offsetVec.mag();
if(random(3000) < outside && random() > 0.7){
strokeWeight(1);
//fill(200, 0, 0);
}
else strokeWeight(0);
ellipse(width/2 + offsetVec.x, height/2 + offsetVec.y, random(10, width/8));
}
return [100, 100, width - 200, height - 200];
}
register(CircularCloud, "CircularCloud", "lokmeinmatz / Matthias");
function cumulus() {
let cloud = [];
const x = width / 2,
y = height / 1.8,
humps = round(random(3, 7)),
diameter = width / humps,
spacing = diameter / 2,
mainHumpPos = 0.5, // 0 = left > 1 = right
piRatio = HALF_PI / (humps / (1 / mainHumpPos));
for (let i in [...Array(humps)]) {
// Start with smaller "puffs", larger in the middle, end with small again
let sine = 1 + sin(piRatio * i),
variance = random(1, 0.7 / mainHumpPos) * sine,
radius = spacing * variance,
newX = width/2 - x / 2 + spacing / 2 + spacing * i; // Seriously? That much effort to move half to the left then continue spacing to the right?
cloud.push([newX, y, radius]); // save the cloud so we can double draw, idk how else to do it
}
// draw black cloud with stroke
cloud.forEach(puff => {
strokeWeight(10);
arc(puff[0], puff[1], puff[2], puff[2], PI, TAU, PIE);
});
// draw white cloud without stroke
cloud.forEach(puff => {
fill(255);
strokeWeight(0);
arc(puff[0], puff[1], puff[2], puff[2], PI, TAU, PIE);
});
return [x / 2, 0, x, height];
}
register(cumulus, "Cumulus", "Luke Flego");
function arcClouds() {
// draws arc
function drawArc(c1, c2, c3) {
// first and second circle intersection points
let fs_int_points = circleIntersetc(c1.x, c1.y, c1.r,
c2.x, c2.y, c2.r);
// second and third circle intersection points
let st_int_points = circleIntersetc(c2.x, c2.y, c2.r,
c3.x, c3.y, c3.r);
//
let p0_x = fs_int_points[0];
let p0_y = fs_int_points[1];
let p1_x = st_int_points[0];
let p1_y = st_int_points[1];
//
let v = createVector(1, 0);
let v1 = createVector(p0_x - c2.x, p0_y - c2.y);
let v2 = createVector(p1_x - c2.x, p1_y - c2.y);
let startAngle = -angle(v1, v);
let endAngle = -angle(v2, v);
strokeWeight(3);
stroke(0);
arc(c2.x, c2.y, c2.r * 2, c2.r * 2, startAngle, endAngle);
}
// computes angle between 2 vectors, returns value between [0, 2*PI]
function angle(v1, v2) {
return Math.atan2(v1.x * v2.y - v1.y * v2.x, v1.x * v2.x + v1.y * v2.y);
}
// computes the intersection points between 2 circles
function circleIntersetc(x0, y0, r0, x1, y1, r1) {
//
let d = dist(x0, y0, x1, y1);
// distance between P0 and P2
let a = (r0 * r0 - r1 * r1 + d * d) / (2 * d);
let h = sqrt(r0 * r0 - a * a);
//
let x2 = x0 + a * (x1 - x0) / d;
let y2 = y0 + a * (y1 - y0) / d;
//
let intp1_x = x2 + h * (y1 - y0) / d;
let intp2_x = x2 - h * (y1 - y0) / d;
let intp1_y = y2 - h * (x1 - x0) / d;
let intp2_y = y2 + h * (x1 - x0) / d;
//
return [intp1_x, intp1_y, intp2_x, intp2_y];
}
noFill();
translate(width / 2, height / 2);
let r1 = 400;
let r2 = 200;
let increment = 0.5;
let firstCircle, secondCircle, thirdCircle;
let circles = [];
// create circles
for(let angle = 0;angle < 2 * PI;angle+=increment) {
let x = r1 * cos(angle);
let y = r2 * sin(angle);
let rr = random(100, 150);
circles.push({
x : x,
y : y,
r : rr
});
}
// draw arcs
for(let j = 0;j < circles.length - 2;j++) {
firstCircle = circles[j];
secondCircle = circles[j + 1];
thirdCircle = circles[j + 2];
if(firstCircle && secondCircle && thirdCircle) {
drawArc(firstCircle, secondCircle, thirdCircle);
}
}
//
firstCircle = circles[circles.length - 2];
secondCircle = circles[circles.length - 1];
thirdCircle = circles[0];
drawArc(firstCircle, secondCircle, thirdCircle);
//
firstCircle = circles[circles.length - 1];
secondCircle = circles[0];
thirdCircle = circles[1];
drawArc(firstCircle, secondCircle, thirdCircle);
//
return [-r1, -r2, 2 * r1, 2* r2];
}
register(arcClouds, "Arc Cloud", "edwin.straub");
// created by georges Daou 29-sep-2017
function randomSimpleCloud() {
let minWidthSub = (5 * width) / 100;
let maxWidthSub = (30 * width) / 100;
let minHeightSub = (70 * height) / 100;
let maxHeightSub = (85 * height) / 100;
let cloudWidth = width - floor(random(minWidthSub, maxWidthSub)) - 100;
let cloudHeight = height - floor(random(minHeightSub, maxHeightSub) - 100);
push();
translate(width / 2, height / 2);
noStroke();
fill(255);
//base papa cloud
ellipse(0, 0, cloudWidth, cloudHeight);
angleMode(DEGREES);
for (let angle = 0; angle < 360; angle += random(20, 30)) { //generating little cloudinette :)
//choose right coordinates for the cloudinette not too close to the edge
let x = ((cloudWidth / 2) * cos(angle));
if (abs(x) > cloudWidth / 2 - cloudWidth / 6)
continue;
let y = (cloudHeight / 2) * sin(angle);
//pushing the cloudinette a bit to the center for more realistic look
if (y >= 0)
y = random(y - 20, y);
else
y = random(y, y + 20);
// finally choose width and height in relation of the papa cloud size
ellipse(x, y, random(cloudWidth / 4, cloudWidth / 4 + 15), random(cloudHeight / 2, cloudHeight / 2 + 15));
}
pop();
return [100, 100, width - 200, height - 200];
}
register(randomSimpleCloud, "Simple Random Cloud", "Georges Daou");
// Puffy Cloud
function puffyCloud(){
const puffRadius = width/6;
const mainRadius = width/2.5;
let x, y;
let stack = [];
push();
translate(width / 2, height / 2);
angleMode(DEGREES)
noStroke();
fill(255, 255, 255);
ellipse(0, 0, mainRadius*2, mainRadius);
fill(0, 0, 0);
for(let i = 0; i <=360;) {
x = mainRadius * cos(i);
y = 0.5 * mainRadius * sin(i);
r = puffRadius * random(0.9, 1.5) * ((y+width) / width);
ellipse(x, y, r, r);
i += random(15, 25);
stack.push({x: x, y: y, r: r});
}
fill(255, 255, 255);
stack.forEach(function (puff) {
let x = puff.x * .97;
let y = puff.y * .97;
let r = puff.r * .985;
ellipse(x, y, r, r);
});
pop();
return [100, 100, width - 200, height - 200];
}
register(puffyCloud, "Puffy Cloud", "Cary Stanley (@carystanley)")
function bubblyCloud() {
let RANGE = 30;
let SMALLEST = 0.1;
let SHADOW_A = Math.PI / 8 * 3;
let SHADOW_I = 1.1;
let SIDE = (height < width ? height : width)
for(var i = 0; i <= RANGE; i++) {
let dist = i * (1 - SMALLEST) * 2 / RANGE - 1 - SMALLEST;
let diameter = SIDE * (1 - dist * dist) * 0.7;
let shadow = i / RANGE * 255
push();
translate(width / 2 - diameter / 2 + random(diameter), height / 2 - diameter / 2 + random(diameter));
fill(shadow / 10 + 228);
noStroke();
smooth();
ellipse(0, 0, diameter - 1, diameter - 1);
var start_a = SHADOW_A + 0.005 - Math.PI / 2;
var stop_a = SHADOW_A - 0.005 + Math.PI / 2;
fill(shadow / 10 + 200);
arc(0, 0, diameter, diameter, start_a, stop_a, CHORD);
let m_d = diameter * SHADOW_I;
let ad = asin(diameter / m_d);
start_a = SHADOW_A - ad;
stop_a = SHADOW_A + ad;
let r_d = sqrt(m_d * m_d - diameter * diameter) / 2
let offset_x = -r_d * cos(SHADOW_A);
let offset_y = -r_d * sin(SHADOW_A);
fill(shadow / 10 + 228);
arc(offset_x, offset_y, m_d, m_d, start_a, stop_a, CHORD);
pop();
}
return [(width - SIDE) / 2, (height - SIDE) / 2, SIDE, SIDE, 80];
}
register(bubblyCloud, "Bubbly Cloud", "G4m3M4ni4c");
function mcCloud() {
noStroke();
const w = width - width / 3;
const h = w / 4;
const dmin = w / 4;
const dmax = w / 2;
const offset = createVector((width - w) / 2, (height - h) / 2);
const gray = 240;
const getPosition = (i) => {
if (i < w) return createVector(i, 0);
if (i < w + h) return createVector(w, i - w);
if (i < w * 2 + h) return createVector(i - (w + h), h);
if (i < (w + h) * 2) return createVector(0, i - (w * 2 + h));
return null;
};
let i = random(dmax - dmin);
let pos;
while (pos = getPosition(i)) {
pos.add(offset);
var d = random(dmin, dmax);
for (let j = 0; j <= 20; j+=5) {
fill(gray, gray, gray, map(j, 0, 20, 100, 0));
ellipse(pos.x, pos.y + 50 + j, d);
}
fill(255, 255, 255);
ellipse(pos.x, pos.y, d);
i += d / 2;
}
rect(offset.x, offset.y, w, h);
return [offset.x, offset.y, w, h];
}
register(mcCloud, "Mc Cloud", "Rodolphe Peccatte");
function drawBumpyCloud()
{
push();
strokeWeight(5);
translate(width / 2, height / 2);
angleMode(DEGREES);
let cloudWidth = width / 2;
let cloudHeight = height / 2;
let vertices = [];
for (let i = random(5, 15); i < 360; i += random(20, 15))
{
vertices.push(
{
x: cos(i) * (cloudWidth / 2),
y: sin(i) * (cloudHeight / 2)
});
}
vertices.push(vertices[0]);
stroke(0);
fill(255);
for (let i = 0; i < vertices.length - 1; i++)
{
let p1 = vertices[i];