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@discatte
Forked from beesandbombs/spiralThing.pde
Created May 13, 2022 18:43
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spiral thing
// by dave @beesandbombs :)
float[][] result;
float t, c;
float ease(float p) {
p = c01(p);
return 3*p*p - 2*p*p*p;
}
float ease(float p, float g) {
p = c01(p);
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));
float c01(float g) {
return constrain(g, 0, 1);
}
float millisFrame1;
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);
t %= 1;
draw_();
loadPixels();
for (int i=0; i<pixels.length; i++) {
result[i][0] += sq(red(pixels[i])/255.0);
result[i][1] += sq(green(pixels[i])/255.0);
result[i][2] += sq(blue(pixels[i])/255.0);
}
}
loadPixels();
for (int i=0; i<pixels.length; i++)
pixels[i] = color(255*sqrt(result[i][0]/samplesPerFrame),
255*sqrt(result[i][1]/samplesPerFrame),
255*sqrt(result[i][2]/samplesPerFrame));
updatePixels();
saveFrame("f###.png");
if (frameCount==numFrames)
exit();
} else if (preview) {
if (frameCount==1)
millisFrame1 = millis();
c = mouseY*1.0/height;
if (mousePressed)
println(c);
t = ((millis()-millisFrame1)/(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 = 300;
float shutterAngle = .3;
boolean recording = false,
preview = true;
void setup() {
size(750, 750, P3D);
smooth(8);
result = new float[width*height][3];
noStroke();
ortho();
}
float x, y, z, tt;
float myR(float q) {
return lerp(200, 80, ease(q)) + 60*exp(-50*sq(q-.35)) - 45*exp(-90*sq(q-.5));
}
float myG(float q) {
return lerp(60, 10, q) + map(cos(TAU*q), 1, -1, 0, 180) + 45*exp(-150*sq(q-.33)) -25*exp(-120*sq(q-.51));
}
float myB(float q) {
return map(cos(.92*TAU*q*q), 1, -1, 0, 150) + lerp(36, 100, q);
}
color myCol(float q) {
q = c01(q);
return color(myR(q), myG(q), myB(q));
}
float l = 90, w = 40;
float qq;
int N = 1200;
float r = 120, th, ph;
PImage fr;
void draw_() {
background(0);
push();
translate(width/2, height/2);
scale(1.2);
beginShape(TRIANGLE_STRIP);
for(int i=0; i<N; i++){
qq = i/float(N-1);
th = TAU*t;
x = r*sin(3*(th - PI*qq));
y = r*sin(2*(th - PI*qq)-TAU*t);
z = r*cos(th-PI*qq-TAU*t);
ph = TAU*6*(qq-t);
fill(myCol(.9*(qq)));
vertex(x+l/2*cos(ph),y+l/2*sin(ph),z);
fill(myCol(.9*(qq)+.1));
vertex(x-l/2*cos(ph),y-l/2*sin(ph),z);
}
endShape();
pop();
}
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