void scribe(String S) {fill(black); text(S,20,20); noFill();}
void scribe(String S, int i) {fill(black); text(S,20,20+i*20); noFill();}
void mousePressed() { if (mouse().isInWindow()) clickPolygon(); else ; } 
  
void keyPressed() {  
  if (key==' ') showHelpText=!showHelpText ; 
  if (key=='c') {showCircles=!showCircles; } ;  
  if (key=='a') {animate=!animate; } ;  
  if (key=='f') {showFrames=!showFrames; } ;  
  if (key=='s') {showSpiral=!showSpiral; } ;  
  if (key=='l') {showLinear=!showLinear; } ;  
  if (key=='g') {loadP(); fn=(fn+1)%(maxfn+1); } ;  
  if (key=='A') {if(fn<maxfn) savePts("P"+Format0(fn,2)); else {fn=maxfn; savePts("P"+Format0(fn,2)); maxfn++; saveP();};}; 
  if (key=='G') {if(fn<maxfn) loadPts("P"+Format0(fn,2)); };
  if (key=='X') {String S=" "+"-####.tif"; saveFrame(S); };  
  if (key=='?') printIt=true;  // toggle debug mode
   };     

void showHelp() {
    fill(dblue); pushMatrix(); translate(20,20);
     text("PGS (PLANAR GEOMETRY SANDBOX) by Jarek Rossignac",0,0); translate(0,20);
     text("SPIRAL MORPH",0,0); translate(0,20);
      text("Feb 18, 2008  ",0,0); translate(0,20);
      text("  ",0,0); translate(0,20);
     text("First click in the window to activate it ",0,0); translate(0,20);
     text("Press SPACE to show/hide this help text",0,0); translate(0,20);
     text("Click & drag points A, B...E ",0,0); translate(0,20);
     text("Press 'z, 'r', 't' click&drag mouse to zoom, rotate, translate all points ",0,0); translate(0,20);
     text("Press 'g' and then 'G' to select and load file",0,0); translate(0,20);
     text("show/hide a:animatio, f:frames, c:construction",0,0); translate(0,20);
     text("Press 's' to show/hide the spiral morph, 'l' to show/hide the linear morph",0,0); translate(0,20);
     text("  ",0,0); translate(0,20);
     text("WHEN RUNNING PROCESSING (not an applet through a browser):",0,0); translate(0,20);
     text("Press 'X' top snap a picture (when running Processing, not in browser)",0,0); translate(0,20);
     text("Press 'g' to select file name and 'A' to save the model",0,0); translate(0,20);
     text("'?' print debugging stuff (when running Processing, not in browser)   ",0,0); translate(0,20);
     popMatrix(); noFill();
   }