• fullscreen
  • sketch_july13_archimedeanSpiralRotate02_strokeInteractive.pde
  • float r;
    float x;
    float y;
    float theta=360*30;
    int multi = 1;
    float espessura;
    
    PGraphics offScreen;
    
    void setup() {
        size(900, 720,P2D);
        //strokeWeight(espessura);
        noFill();
        smooth();
        background(0);
        frameRate(120);
        offScreen =  createGraphics(900, 720, P2D);
        offScreen.beginDraw();
        offScreen.background(0);
        offScreen.noFill();
        offScreen.smooth();
        offScreen.endDraw();
        
    }
    
    
    void draw() {  
        offScreen.beginDraw();
        offScreen.strokeWeight(espessura);
    
      espessura=0.1+7*mouseX/height;
    
       offScreen.translate(width/2, height/2); // translate to center of screen
    
        for (int i =0; i< 250; i++) {
          theta=theta+ multi*0.29;
                  
          r = 360-theta/30;
            
              //limites para a espiral parar de ser desenhada 
              if (theta < 0 || theta >360*30) {
                multi = multi * -1; //alternando entre inteiro positivo e negativo: +1 -1
                break;
              }
                   if (multi > 0) {
                      offScreen.stroke(0,0,0);
                    }
                    if (multi < 0) {
                      offScreen.stroke(255, 255, 255);
                      //offScreen.strokeWeight(espessura);
                    }
                   
                  
          x =r*cos(radians(theta)); // radians para converter pi em radianos
          y =r*sin(radians(theta));
              
            
           offScreen.point (x, y);    
            
        }
       offScreen.endDraw();
      translate(width/2,height/2);
      pushMatrix();
      rotate(radians(theta));
     //translate(width/2,height/2);
      image(offScreen,-width/2,-height/2); 
     tint(255,60);
    
      popMatrix();
    } 
    
     
    

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    about this sketch

    This sketch is running as Java applet, exported from Processing.

    license

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    juliana mori

    archimedeanSpiral_strokeInteractive

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    Mova o mouse (eixo x, y) para alterar a espessura das linhas da espiral
    ///////////////
    Move your mouse (x, y axis) to change the spiral stroke lines

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