LibCinder copy of Georg Nees's classic media art piece Schotter.

schotter.cpp

#include "cinder/app/AppBasic.h"
#include "cinder/gl/gl.h"
#include "cinder/Rand.h"

using namespace ci;
using namespace ci::app;
using namespace std;

const Vec3f DrawingOffset = Vec3f(50, 50, 0);
const Vec2f DrawingDimensions = Vec2f(12, 23);

const Vec3f CubeSize = Vec3f(25, 25, 0);

const float MaxOffsetJitter = 1;
const float MaxRotationJitter = 10;

class SchotterApp : public AppBasic {
public:
    void prepareSettings( Settings *settings );
    void draw();
    void mouseDown( MouseEvent event );
private:
    int m_seed;
};

void SchotterApp::mouseDown( MouseEvent event )
{
    m_seed++;
}

void SchotterApp::prepareSettings( Settings *settings )
{
    settings->setWindowSize(DrawingOffset.x * 2 + (DrawingDimensions.x - 1) * CubeSize.x, DrawingOffset.y * 2 + (DrawingDimensions.y - 1) * CubeSize.y);
    settings->setTitle("Faux Schotter");
    settings->setResizable(false);
}

void SchotterApp::draw()
{
    Rand::randSeed(m_seed);
    
    gl::clear( Color::white() );
    gl::color( Color::black() );
    
    for (int x = 0; x < DrawingDimensions.x; x++) {
        for (int y = 0; y < DrawingDimensions.y; y++) {
            
            gl::pushMatrices();
            
                int cubeNumber = y * CubeSize.y + x;
                float jitterFactor = (float) cubeNumber / (DrawingDimensions.x + DrawingDimensions.y);
                
                Vec3f center(x * CubeSize.x, y * CubeSize.y, 0 * CubeSize.z);
                center += DrawingOffset;
                
                Vec3f offsetJitter = Rand::randVec3f() * jitterFactor * MaxOffsetJitter;
                offsetJitter.z = 0;
                center += offsetJitter;
                
                gl::translate(center);
                
                float rotationJitter = (Rand::randFloat() - 0.5) * jitterFactor * MaxRotationJitter ;
                gl::rotate(rotationJitter);
                
                gl::drawStrokedCube( Vec3f::zero(), CubeSize );
            
            gl::popMatrices();
            
        }
    }
}


CINDER_APP_BASIC( SchotterApp, RendererGl )