// spiral electron animation, version 2 // // keep watching! This sketch evolves quite slowly over time :) // The phase shifts gradually, which changes the number of spiral arms // and their direction of rotation. // // steven kay, June 2010 PFont caption; void setup() { size(512,512,P3D); caption=loadFont("ArialMT-48.vlw"); textFont(caption,16.0); //uncomment the following to limit the frame rate //frameRate(25); } float factor; float factor_change_rate=800000.0; float factor_change_rate_2=200000.0; void draw() { background(0); //noStroke(); stroke(0); factor=3.0+(3.0*sin(frameCount/factor_change_rate)); float c=1.2; // size ellipseMode(CENTER); float x,y; for (int n=0;n<800;n++) { float off=float(frameCount)/20.0; float nn=float(n); float r=c*sqrt(nn); float theta=off+(nn*degrees(factor)); x=nn*sin(theta); y=nn*cos(theta); float z=nn*sin((((float)frameCount)/factor_change_rate_2)*theta); float luma=255-(nn/c); if (n%1==0) { pushMatrix(); translate(256,256); translate(x,y,z); fill(luma,0,255-luma); float sz=30-(n/10); ellipse(0,0,sz,sz); popMatrix(); } } //optional - show value of factor //fill(0); //text(""+factor,1,501); //fill(255); //text(""+factor,0,500); }

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