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Created July 14, 2014 13:46
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// by david
int[][] result;
void setup() {
setup_();
result = new int[width*height][3];
}
void draw() {
if (!recording) {
t = mouseX*1.0/width;
draw_();
} else {
for (int i=0; i<width*height; i++)
for (int a=0; a<3; a++)
result[i][a] = 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 | (result[i][0]/samplesPerFrame) << 16 |
(result[i][1]/samplesPerFrame) << 8 | (result[i][2]/samplesPerFrame);
updatePixels();
saveFrame("f###.gif");
if (frameCount==numFrames)
exit();
}
}
//////////////////////////////////////////////////////////////////////////////
int samplesPerFrame = 8;
int numFrames = 120;
float shutterAngle = .8;
boolean recording = true;
void setup_() {
size(800, 500, P2D);
smooth(8);
noFill();
}
float r(float th, float q) {
float pr = cos(PI/3)/cos(th - TWO_PI/3 *floor((3*th + PI)/TWO_PI));
float cr = .69;
return lerp(pr, cr, q);
}
int N = 120;
float sc = 185;
float x, y;
float d, ang;
float t;
float ph;
void figure(float q) {
beginShape();
for (int i=0; i<N; i++) {
ang = i*TWO_PI/N;
d = sc*r(ang, q);
x = d*cos(ang);
y = d*sin(ang);
vertex(x, y);
}
endShape(CLOSE);
}
void makeMask() {
background(0);
fill(255);
noStroke();
for (int i=0; i<3; i++)
arc(width/2, height/2, 800, 800, (i+.25+.5*t)*TWO_PI/3, (i+.75+.5*t)*TWO_PI/3);
}
PImage mask, first;
float sw = 14;
void draw_() {
ph = t;
for (int i=0; i<3; i++)
ph = 3*ph*ph - 2*ph*ph*ph;
makeMask();
mask = get();
pushMatrix();
translate(width/2, height/2);
rotate(HALF_PI + TWO_PI/6*t);
noFill();
background(0);
stroke(255);
strokeWeight(sw);
figure(ph);
pushMatrix();
scale(-1, 1);
stroke(0);
strokeWeight(1.8*sw);
figure(1-ph);
stroke(255);
strokeWeight(sw);
figure(1-ph);
popMatrix();
first = get();
first.mask(mask);
background(0);
pushMatrix();
scale(-1, 1);
stroke(255);
strokeWeight(sw);
figure(1-ph);
popMatrix();
stroke(0);
strokeWeight(1.8*sw);
figure(ph);
stroke(255);
strokeWeight(sw);
figure(ph);
popMatrix();
image(first, 0, 0);
}
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