autofasurer

A little test for an upcoming 360º dome short. The digital noise was obtained by ‘editing’ the raw data of a .dv file in ‘Hex Fiend’, a freeware hex editor for OS X (http://ridiculousfish.com/hexfiend/). The compositing was done in After Effects. 

Production of the movie is in the hands of Visualantics.

Just for fun. App below (os x ), spacebar generates a new random image.

/*
*  harmonograph.cpp
*
*  Created by Brecht Debackere on 02/04/10.
*  Copyright 2010 Autofasurer. All rights reserved.
*
*/

#include <GLUT/glut.h>
#include <iostream>
using namespace std;

//initialising variables
float fXpos = 0.0, fYpos = 0.0, fFrequency = 0.0, fAmplitude = 0.0, fPhase = 0.0, fTime = 0.0;

//initialising states
void init()
{
glClearColor(0.0,0.0,0.0,0.7);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE);
}

//reshaping the viewport and projection
void reshape(int width, int height)
{
glViewport(0, 0, 1024, 768);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(90.,(GLfloat) width/(GLfloat) height,0.1, 800.0);
glMatrixMode(GL_MODELVIEW);
gluLookAt(0.0,0.0,10.0, 0.0, 0.0, 0.0, 0,1,0);

}

//reading the keyboard input
void key(unsigned char key, int x, int y){
switch (key){
case 32:
fFrequency = (rand()%500-250)/5.0;
fPhase = (rand()%500-250)/5.0;
fAmplitude = (rand()%500-250)/5.0;
fTime = 0.0;
break;
}
}

//drawing and displaying
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glBegin(GL_POINTS);
glColor3d(0.2, 0.1, 0.0);
while (fTime < 100.0) {
fXpos = 4*(cos(fFrequency * fTime) + cos(fPhase * fTime)*0.5 + cos(fAmplitude * fTime)*0.33);
fYpos = 4*(sin(fFrequency * fTime) + sin(fPhase * fTime)*0.5 + sin(fAmplitude * fTime)*0.33);
glVertex3f(fXpos, fYpos, 0);
fTime += 0.001;
}
glEnd();
fFrequency -= 0.0001;
fAmplitude += 0.0001;
fPhase += 0.0001;
fTime = 0.0;
glutSwapBuffers();
}

//main loop with initialising of window and glut, assigning functions
int main(int argc, char** argv)
{
srand(time(NULL));
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
glutGameModeString(”1024×768:32″);
glutEnterGameMode();
init();
glutDisplayFunc(display);
glutIdleFunc(display);
glutReshapeFunc(reshape);
glutKeyboardFunc(key);
glutMainLoop();
return 0;
}

SpirographApp

Ok. It ends here. The final version of the spirograph/harmonograph patch, in both 2d and 3d version. Enjoy. The previous post shows some of the results I got out of it. The patches generate a new random shape whenever the space bar is hit. If a particular image is to your liking, you can save it using the pattrstorage in the bottom.

2dSpirograph

3dSpirograph

By request, here’s a standalone version of the 2d patch. Hopefully it works, if not, drop me a line.

2dSpirograph standalone os X

Here are some screenshots of the harmonograph patch below. I’ve slightly altered it, using different formulae.

Here’s a patch which started as an attempt to make a harmonograph in jitter. It’s not entirely right just yet, but it does produce a nice range of images. The patch comes with an .xml file with some presets. If anyone creates new presets for it, or builds on the patch I’d very much like to see the results or hear about the specific settings.

Get the patch here:

Harmonograph