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dancing dots gif
// gif by dave @beesandbombs
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###.gif");
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 = 120;
float shutterAngle = .6;
boolean recording = false,
preview = true;
void setup() {
size(750, 750, P3D);
smooth(8);
pixelDensity(recording ? 1 : 2);
result = new int[width*height][3];
strokeWeight(2);
ortho();
}
float r = 12, // radius of small ring
d = 12; // diameter of dot
float y, R, lineOpacity;
void ring(int num, float q) {
q = (q+1000)%1;
R = r/sin(PI/num);
y = r/tan(PI/num);
for (int i=0; i<num; i+=2) {
push();
rotate(TWO_PI*i/num);
if(q >= .5)
rotate(TWO_PI/num);
translate(0, y);
if(q <= .5)
rotate(TWO_PI*q);
else
rotate(-TWO_PI*q);
lineOpacity = map(cos(TWO_PI*2*q), 1, -1, 0, 1);
stroke(lerpColor(color(250), color(30), lineOpacity));
noFill();
ellipse(0, 0, 2*r, 2*r);
push();
translate(0,0,1);
fill(30);
noStroke();
ellipse(-r, 0, d, d);
ellipse(r, 0, d, d);
pop();
pop();
}
}
void draw_() {
background(250);
push();
translate(width/2, height/2);
for (int i=0; i<5; i++)
ring(8 + 12*i, t - i/20.0);
pop();
}
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