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pretzel
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) {
t = mouseX*1.0/width;
c = mouseY*1.0/height;
if (mousePressed)
println(c);
draw_();
} else {
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###.gif");
if (frameCount==numFrames)
exit();
}
}
//////////////////////////////////////////////////////////////////////////////
int samplesPerFrame = 8;
int numFrames = 240;
float shutterAngle = 1;
boolean recording = false;
void setup() {
size(750, 750, P3D);
pixelDensity(recording ? 1 : 2);
smooth(8);
result = new int[width*height][3];
rectMode(CENTER);
fill(32);
noStroke();
}
float x, y, z, tt;
int N = 280;
int p = 3, q = 4;
float r = 80;
float x(float ph) {
return r*(1.5 + cos(q*ph))*cos(p*ph);
}
float y(float ph) {
return r*(1.5 + cos(q*ph))*sin(p*ph);
}
float z(float ph) {
return -r*sin(q*ph);
}
float d, lt, qq, rr = 18;
color[] cols = { #fa4020, #202020, #418a9f };
void draw_() {
background(250);
push();
translate(width/2, height/2 - 40);
for (int i=0; i<N; i++) {
lt = (1-t + i/float(N))%1;
randomSeed(i);
qq = TWO_PI*i/N;
x = x(qq) + randomGaussian()*rr;
y = y(qq) + randomGaussian()*rr + lerp(-90,90,lt);
z = z(qq) + randomGaussian()*rr;
push();
translate(x*cos(TWO_PI*t) + z*sin(TWO_PI*t), y, z*cos(TWO_PI*t) - x*sin(TWO_PI*t));
fill(cols[i%3]);
d = map(sin(TWO_PI*t - qq), 1, -1, 0, 1);
d = max(0,2*lt-1);
d *= lerp(.7,6,sq(random(1)));
ellipse(0, 0, 16*d, 16*d);
pop();
}
pop();
}
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