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hue donut
int[][] result;
float t, c;
float ease(float p) {
return 3*p*p - 2*p*p*p;
}
float ease(float p, float g) {
if (p < 0.5)
return 0.5 * pow(2*p, g);
else
return 1 - 0.5 * pow(2*(1 - p), g);
}
float mn = .5*sqrt(3), ia = atan(sqrt(.5));
void push() {
pushMatrix();
pushStyle();
}
void pop() {
popStyle();
popMatrix();
}
float c01(float g) {
return constrain(g, 0, 1);
}
void draw() {
if (recording) {
for (int i=0; i<width*height; i++)
for (int a=0; a<3; a++)
result[i][a] = 0;
c = 0;
for (int sa=0; sa<samplesPerFrame; sa++) {
t = map(frameCount-1 + sa*shutterAngle/samplesPerFrame, 0, numFrames, 0, 1);
draw_();
loadPixels();
for (int i=0; i<pixels.length; i++) {
result[i][0] += pixels[i] >> 16 & 0xff;
result[i][1] += pixels[i] >> 8 & 0xff;
result[i][2] += pixels[i] & 0xff;
}
}
loadPixels();
for (int i=0; i<pixels.length; i++)
pixels[i] = 0xff << 24 |
int(result[i][0]*1.0/samplesPerFrame) << 16 |
int(result[i][1]*1.0/samplesPerFrame) << 8 |
int(result[i][2]*1.0/samplesPerFrame);
updatePixels();
saveFrame("f###.png");
if (frameCount==numFrames)
exit();
} else if (preview) {
c = mouseY*1.0/height;
if (mousePressed)
println(c);
t = (millis()/(20.0*numFrames))%1;
draw_();
} else {
t = mouseX*1.0/width;
c = mouseY*1.0/height;
if (mousePressed)
println(c);
draw_();
}
}
//////////////////////////////////////////////////////////////////////////////
int samplesPerFrame = 4;
int numFrames = 144;
float shutterAngle = .6;
boolean recording = false,
preview = true;
void setup() {
size(750, 750, P3D);
smooth(8);
result = new int[width*height][3];
colorMode(HSB,1);
noStroke();
}
float x, y, z, tt;
int nSides = 72, nCircs = 360;
float R = 180, r = 70; // radii
PImage fr;
float hue, hueSpread = 0.3;
float th;
float chop = .7; // can draw fewer because of overlap trick...
void hueCirc(float initHue){
beginShape();
for(int i=0; i<nSides; i++){
th = TWO_PI*i/nSides;
x = r*cos(th);
y = r*sin(th);
hue = (initHue + map(y,r,-r,0,hueSpread)) %1;
fill(hue,1,1);
vertex(r*cos(th), r*sin(th));
}
endShape(CLOSE);
}
void draw_() {
background(0);
push();
translate(width/2, height/2);
for(int i=0; i<nCircs*chop; i++){
push();
translate(R*sin(TWO_PI*i/nCircs + PI), R*cos(TWO_PI*i/nCircs + PI));
hueCirc(t);
pop();
}
// now take care of that overlap!
fr = get();
for(int i=0; i<nCircs*chop; i++){
push();
translate(R*sin(TWO_PI*i/nCircs), R*cos(TWO_PI*i/nCircs));
hueCirc(t);
pop();
}
pop();
copy(fr,0,0,width/2,height,0,0,width/2,height);
}
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