Created
July 3, 2017 22:35
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triangle sweep
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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(); | |
} | |
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("t###.gif"); | |
if (frameCount==numFrames) | |
exit(); | |
} | |
} | |
////////////////////////////////////////////////////////////////////////////// | |
int samplesPerFrame = 8; | |
int numFrames = 220; | |
float shutterAngle = .8; | |
boolean recording = false; | |
void setup() { | |
size(720, 720, P3D); | |
smooth(8); | |
strokeWeight(1.2); | |
result = new int[width*height][3]; | |
rectMode(CENTER); | |
stroke(50); | |
noFill(); | |
} | |
float x, y, z, tt; | |
int N = 96, speed = 8; | |
float rad = 275; | |
int start; | |
float qq, x1, y1, x2, y2; | |
void oneLine(float q) { | |
qq = (3*q)%1; | |
x1 = lerp(-rad*mn, 0, qq); | |
x2 = lerp(0, rad*mn, qq); | |
y1 = lerp(rad/2, -rad, qq); | |
y2 = lerp(-rad, rad/2, qq); | |
push(); | |
rotate(TWO_PI*int(3*q)/3.0); | |
line(x1, y1, x2, y2); | |
pop(); | |
} | |
void draw_() { | |
start = int((N-speed)*t); | |
background(247); | |
push(); | |
translate(width/2, height/2 + 50); | |
triangle(0,-rad,-rad*mn,rad/2,rad*mn,rad/2); | |
for (int i=start; i<start+N/3; i++) | |
oneLine((i+speed*t)/float(N)); | |
pop(); | |
} |
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gif: https://twitter.com/beesandbombs/status/881857295008882689