Processing für Geeks - Versionsgeschichte

Fake: better plugin

2010-04-30T14:21:38Z

better plugin

Fake: geshi!

2010-04-30T13:46:05Z

geshi!

Fake: category added

2010-04-30T13:30:53Z

category added

Fake: code!

2010-04-30T13:30:01Z

code!

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Nibble: "[http://processing.org Processing] für Geeks" von Nikolaus Gradwohl, gehalten am Abend der [[Eroeffnungsveranstaltung]] am 10. April 2010

=== Code des gezeigten Processing Audio Visualizers ===
Datei: '''particle.pde''':

public class Particle {
float x, y, z;
float vx, vy, vz;
boolean alive;
PImage tex;
color ti;

public Particle( float x, float y, float z, float vx, float vy, float vz, PImage tex, color ti ) {
this.tex = tex;
this.x = x;
this.y = y;
this.z = z;
this.vx = vx;
this.vy = vy;
this.vz = vz;
this.ti = ti;
alive = true;
}

public Particle( float x, float y, float z, float vx, float vy, float vz, PImage tex ) {
this( x, y, z, vx, vy, vz, tex, color( 255, 255, 255 ));
}

public void update() {
x += vx * 0.1f;
y += vy * 0.1f;
z += vz * 0.1f;

vy += 0.1;

if (y > 600) {
alive = false;
}
}

public void draw( float alph ) {
pushMatrix();
translate( x, y, z );
rotateY( alph );
textureMode(NORMALIZED);
tint(ti);
beginShape();
texture( tex );
vertex( -20, -20, 0, 0, 0 );
vertex( -20, 20, 0, 0, 1 );
vertex( 20, 20, 0, 1, 1 );
vertex( 20, -20, 0, 1, 0 );
endShape(CLOSE);
popMatrix();
}

public boolean isAlive() {
return alive;
}
}

Datei: '''particledemo.pde''':
/**
a 3d particle audio vizualizer by
<a href="http://www.local-guru.net/blog">Guru</a>
press any key to emit a new burst of particles
*/

import processing.opengl.*;
import javax.media.opengl.*;
import ddf.minim.*;
import ddf.minim.analysis.*;
//Particle[] p;
ArrayList p = new ArrayList();
Particle[] burst;
PImage tex;
boolean present = false;
Minim minim;
AudioInput in;
FFT fft;

void setup() {
for ( int i = 0; i < args.length; i ++ ) {
if ("--present".equals(args[i])) {
present = true;
break;
}
}
if (present) {
size(screen.width,screen.height, OPENGL);
} else {
size(600,600, OPENGL);
}

tex = makeTexture( 10 );
burst = new Particle[100];

minim = new Minim(this);
in = minim.getLineIn( Minim.MONO, 512 );
fft = new FFT( in.bufferSize(), in.sampleRate());
}

float alph = 0;

void draw() {
background(0);

alph += 0.01f;
PGraphicsOpenGL pgl = (PGraphicsOpenGL) g;
GL gl = pgl.gl;
pgl.beginGL();

gl.glDepthMask(false);
gl.glDisable(GL.GL_DEPTH_TEST);
gl.glEnable(GL.GL_BLEND);
gl.glBlendFunc(GL.GL_SRC_ALPHA,GL.GL_ONE);

pushMatrix();
translate( width, 0, -300 );
scale( min( width, height) /150 );

rotateY( alph );

fft.forward( in.mix );

for( int i = 0; i < fft.specSize(); i++) {
float val = fft.getBand(i)*(i+1)/75;
if( val > 2 && random(1000) > 800 + p.size() ) {
colorMode(HSB,fft.specSize(),100,100);
p.add( new Particle( 0, 300, 0 , random( -5, 5 ), random( -20, -5), random( -5, 5 ), tex, color( i, 40,100)));
}
}

ArrayList dead = new ArrayList();
for( Iterator i = p.iterator(); i.hasNext(); ) {
Particle par = (Particle)i.next();
par.update();
par.draw( - alph );
if (!par.isAlive()) {
dead.add( par );
}
}

for( Iterator i = dead.iterator(); i.hasNext(); ) {
p.remove( i.next());
}

for( int i = 0; i < burst.length; i ++ ) {
if ( burst[i] != null && burst[i].isAlive()) {
burst[i].update();
burst[i].draw( -alph );
}
}

pgl.endGL();
popMatrix();
}

PGraphics makeTexture( int r ) {
PGraphics res = createGraphics( r * 6, r * 6, P2D);
res.beginDraw();
res.loadPixels();
for ( int x = 0; x < res.width; x++) {
for( int y = 0; y < res.height; y++ ) {
float d = min( 512, 50* sq( r / sqrt( sq( x - 3 * r) + sq( y - 3 * r))));
res.pixels[y * res.width + x] = color( min(255,d), min(255, d*0.8), d* 0.5 );
}
}
res.updatePixels();
res.endDraw();

return res;
}

← Nächstältere Version		Version vom 30. April 2010, 13:30 Uhr
Zeile 173:		Zeile 173:
	return res;		return res;
	}		}
		+
		+	[[Category:Workshops]]

@@ Zeile 2: / Zeile 2: @@
 === Code des gezeigten Processing Audio Visualizers ===
-Datei: '''particle.pde''':
+[[File:particle.pde]]:
-<geshi lang="python">
+<syntaxhighlight lang="python">
- public class Particle {
+public class Particle {
    float x, y, z;
    float vx, vy, vz;
@@ Zeile 22: / Zeile 22: @@
      alive = true;
+   }
-−
    public Particle( float x, float y, float z,  float vx, float vy, float vz, PImage tex ) {
      this( x, y, z, vx, vy, vz, tex, color( 255, 255, 255 ));
@@ Zeile 58: / Zeile 58: @@
      return alive;
+   }
-−
+}
-</geshi>
+</syntaxhighlight >
-Datei: '''particledemo.pde''':
+[[File:particledemo.pde]]:
-<geshi lang="python">
+<syntaxhighlight lang="python">
- /**
+/**
-  a 3d particle audio vizualizer by
+a 3d particle audio vizualizer by Guru
-  <a href="http://www.local-guru.net/blog">Guru</a>
+http://www.local-guru.net/blog
-  press any key to emit a new burst of particles
- */
+press any key to emit a new burst of particles
 */
- import processing.opengl.*;
- import javax.media.opengl.*;
+import processing.opengl.*;
- import ddf.minim.*;
+import javax.media.opengl.*;
- import ddf.minim.analysis.*;
+import ddf.minim.*;
- //Particle[] p;
+import ddf.minim.analysis.*;
- ArrayList p = new ArrayList();
+//Particle[] p;
- Particle[] burst;
+ArrayList p = new ArrayList();
- PImage tex;
+Particle[] burst;
- boolean present = false;
+PImage tex;
- Minim minim;
+boolean present = false;
- AudioInput in;
+Minim minim;
- FFT fft;
+AudioInput in;
 FFT fft;
- void setup() {
    for ( int i = 0; i < args.length; i ++ ) {
      if ("--present".equals(args[i])) {
@@ Zeile 101: / Zeile 102: @@
    in = minim.getLineIn( Minim.MONO, 512 );
    fft = new FFT( in.bufferSize(), in.sampleRate());
-−
+}
-−
- float alph = 0;
+float alph = 0;
-−
- void draw() {
+void draw() {
    background(0);
-−
    alph += 0.01f;
    PGraphicsOpenGL pgl = (PGraphicsOpenGL) g;
@@ Zeile 117: / Zeile 118: @@
    gl.glEnable(GL.GL_BLEND);
    gl.glBlendFunc(GL.GL_SRC_ALPHA,GL.GL_ONE);
-−
    pushMatrix();
    translate( width, 0, -300 );
    scale( min( width, height) /150 );
-−
    rotateY( alph );
-−
    fft.forward( in.mix );
@@ Zeile 147: / Zeile 148: @@
      p.remove( i.next());
+   }
-−
    for( int i = 0; i < burst.length; i ++ ) {
      if ( burst[i] != null && burst[i].isAlive()) {
@@ Zeile 157: / Zeile 158: @@
    pgl.endGL();
    popMatrix();
-−
+}
-−
-−
- PGraphics makeTexture( int r ) {
+PGraphics makeTexture( int r ) {
    PGraphics res = createGraphics( r * 6, r * 6, P2D);
    res.beginDraw();
@@ Zeile 174: / Zeile 175: @@
    return res;
-−
+}
-</geshi>
+</syntaxhighlight >
 [[Category:Workshops]]