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@beesandbombs
Created July 4, 2017 18:37
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lines making circle
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("f###.gif");
if (frameCount==numFrames)
exit();
}
}
//////////////////////////////////////////////////////////////////////////////
int samplesPerFrame = 8;
int numFrames = 400;
float shutterAngle = .5;
boolean recording = false;
void setup() {
size(720,720,P3D);
smooth(8);
ortho();
result = new int[width*height][3];
}
float x, y, z, tt;
float r = 220, l;
int N = 35;
void draw_() {
background(18);
push();
translate(width/2,height/2);
push();
rotateX(HALF_PI*(int(4*t) + ease((4*t)%1,6)));
strokeWeight(3);
for(int i=0; i<N; i++){
stroke(lerpColor(#12C7FC,#002D68,i/float(N-1)));
y = map(i,-.2,N-.8,-r,r);
l = 2*sqrt(r*r - y*y);
push();
rotateY(i>N/2 ? acos(.5*l/r) : -acos(.5*l/r) );
line(-r,y,r,y);
pop();
}
pop();
strokeWeight(1.75);
stroke(250);
noFill();
ellipse(0,0,2*r+15,2*r+15);
pop();
}
@shaunlebron
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