Processing编程【2】

彩虹下的小车

int  x=0, y=height;
void setup() {
  size(500, 500);
}
void draw() {
  int i;
  int X=0;
  background(0, 0, 255);
  for (i=1000; i>=650; i-=50, X+=37)
  {
    colorMode(HSB, 360, 255, 100);
    stroke(X, 255, 100);
    strokeWeight(50);
    fill(0, 0, 255);
    ellipse(width, height, i, i);
  }
  drawCar(x, height-20, 20);
  x++;
  if (x > width+20) x = 0;
}

void drawCar(int posx, int posy, int thesize)
{
  rectMode(CENTER);
  stroke(0);
  rect(posx, posy-20, thesize, thesize / 14);

  int offset = 20;
  drawWheel(posx - offset, posy - offset+30, offset);
  drawWheel(posx + offset, posy - offset+30, offset);
}

// Draw a wheel at (posx, posy) and use offset to 
// determine its size.

void drawWheel (int posx, int posy, int offset)
{
  noStroke();
  fill(0);
  ellipse (posx, posy,offset, offset);
}

水波模拟

float r=0, r2=0, r3=0, r4=0;
float c=0, c2=0, c3=0, c4=0;
void setup()
{
  size(600, 600);
  background(255);
}
void draw()
{

  noStroke();
  frameRate(70);

  fill(c);
  ellipse(width/2, height/2, r+10, r+10);
  fill(255);
  ellipse(width/2, height/2, r, r);
  c=c+1;
  r=r+1;
  //while(r>50)
  //{
  if (r>50)
  {
    fill(c2);
    ellipse(width/2, height/2, r2+10, r2+10);
    fill(255);
    ellipse(width/2, height/2, r2, r2);
    c2=c2+0.7;
    r2=r2+1;
  }
  if (r2>50)
  {
    fill(c3);
    ellipse(width/2, height/2, r3+10, r3+10);
    fill(255);
    ellipse(width/2, height/2, r3, r3);
    c3=c3+0.7;
    r3=r3+1;
  }
  if (r3>50)
  {
    fill(c4);
    ellipse(width/2, height/2, r4+10, r4+10);
    fill(255);
    ellipse(width/2, height/2, r4, r4);
    c4=c4+0.7;
    r4=r4+1;
  }
}

几何连线

float w=0, h=0;
int i, j, k,X=0;
void setup()
{
  background(255);
  size(500, 500);
  drawline();
}

void drawline() {
  for (k=1; k<=4; k++,X+=60) 
  {
    for (i=1; i<=2; i++)
    {
      for (j=1; j<=2; j++)
      {
        strokeWeight(4);
        colorMode(HSB, 360, 255, 100);
        stroke(X, 255, 100);
        line(width*i/3, w, h, height*j/3);
      }
    }
    if(k==1){h=0;w=width;}
    if(k==2){w=0;h=height;}
    if(k==3){w=width;h=height;}
  }
}