Created
September 4, 2019 16:03
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dancing dots gif
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// 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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