«bufferdisplay» by redFrik

on 10 Feb'12 18:53 in graphic

works with both qt and cocoa. i get a steady 60fps on my machine. try lowering 'l= 1024' at the top if it's too heavy on your cpu.

log fork json 
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//redFrik - bufferdisplay
(
l= 1024;								//global window/buffer size in pixels/samples
s.latency= 0.05;
s.waitForBoot{
	
	//--variables
	var theta= 0;
	var fps= 60;
	var arr= Array.fill(l, 0);
	var cnt= 0;
	
	//--window setup
	var width= l, height= l;
	var w= Window("waveform", Rect(99, 99, width, height), false);
	var u= UserView(w, Rect(0, 0, width, height));
	var w2= width*0.5;
	var h2= height*0.5;
	
	//--buffer
	b= Buffer.alloc(s, l, 1);
	s.sync;
	
	//--interface
	~trails= 1;
	~speed= 0;
	~amp= 0.5;
	~version= 0;
	
	//--main loop
	u.drawFunc= {
		
		//uncomment framerate display in the two lines below to gain some speed
		Pen.color= Color.white;
		Pen.stringAtPoint(""++u.frameRate, Point(10, 10));
		
		
		//--
		b.getn(0, b.numFrames-1, {|data| arr= data});
		
		if(cnt==0, {
			Pen.fillColor= Color.black;	//erase first time
			Pen.fillRect(Rect(0, 0, width, height));
		});
		
		Pen.fillColor= Color.grey(0, ~trails);
		Pen.fillRect(u.bounds);			//manually clear
		Pen.strokeColor= Color.green;
		
		switch(~version,
			0, {									//line
				Pen.rotate(theta, w2, h2);
				Pen.translate(0, h2);
				arr.do{|y, x|
					var p= Point(x, y*(height*~amp));
					if(x==0, {Pen.moveTo(p)}, {Pen.lineTo(p)});
				};
				Pen.stroke;
			},
			1, {									//warp
				Pen.rotate(theta, w2, h2);
				Pen.translate(w2, h2);
				arr.do{|y, x|
					var p= Point(x*~amp, y*~amp).rotate(y*2pi);
					if(x==0, {Pen.moveTo(p)}, {Pen.lineTo(p)});
				};
				Pen.stroke;
			},
			2, {									//flower
				Pen.translate(w2, h2);
				Pen.moveTo(Point(arr[0], 0)*arr[0]);
				arr.do{|y, x|
					var p= Point(y, x)*y;
					var a= x%width/width*2pi+theta;
					Pen.lineTo(p.rotate(a));
				};
				Pen.stroke;
			}
		);
		theta= theta+~speed;
		cnt= cnt+1;
		
		
	};
	
	//--window management
	u.clearOnRefresh= false;			//do not erase - just draw on top of
	w.onClose= {
		b.free;
	};
	w.front;
	CmdPeriod.doOnce({if(w.isClosed.not, {w.close})});
	u.animate= true;
};
)


//some synth that writes into the buffer
v= {RecordBuf.ar(Saw.ar, b)}.play

//change these while the program is running
~trails= 0.2;
~speed= 0.1;
~speed= -0.05;
~trails= 0.01;
~amp= 0.02;
~speed= pi*0.25;
~amp= 0.2;
~version= 1;
~trails= 0.2;
~version= 2;
~version= 1;
~speed= 2pi*1.001;
~amp= 0.5;
v.free;

v= {RecordBuf.ar(SinOsc.ar(0, BPF.ar(VarSaw.ar(MouseX.kr(1, 1000, 1)), MouseY.kr(50, 5000, 1), 0.5)), b)}.play
~version= 1;
~trails= 0.01;
~speed= -0.03;
~speed= -0.05;
~trails= 1;
~amp= 0.5;
~speed= 2pi*0.25;
~trails= 0.1
~amp= 0.2;
~version= 2;
~version= 0;
~speed= 2pi*1.001;
~amp= 10;
~speed= 0;
v.free
raw 2713 chars (focus & ctrl+a+c to copy)
reception
awesome timesink useful
comments
Andy Friend ↪ user 11 Feb'13 11:36

Just great, as usual