用processing生成屏保程序

想法

利用随机数控制圆圈的大小、位置以及颜色，可以产生随机的美感。

让小球动起来，并且在屏幕边界处产生反弹效果。

代码

   1: float circle_x = (float) 0.0;

   2: float circle_y = (float) 0.0;

   3: float circle_radius = (float) 0.0;

   4: int circle_color = 0;

   5:  

   6: public void setup() {

   7:   size(displayWidth, displayHeight);

   8:   background(0);

   9:   frameRate(10);

  10: }

  11:  

  12: public void draw() {

  13:   

  14:   circle_x = random(0, displayWidth);

  15:   circle_y = random(0, displayHeight);

  16:   circle_radius = random(0, (displayWidth + displayHeight) / 20);

  17:   

  18:   circle_color = (int) random(0, 255);

  19:   

  20:   colorMode(RGB, 255);

  21:   fill(0,0,0,5);

  22:   rect(0, 0, displayWidth, displayHeight);

  23:   

  24:   noStroke();

  25:   colorMode(HSB, 255);

  26:   fill(circle_color, 255, 255);

  27:   ellipse(circle_x, circle_y, circle_radius, circle_radius);

  28:     

  29: }

截图

生成exe文件

将上述代码粘贴到Processing编辑器中，选择“Export Application”，导出成exe文件。

设置为屏幕保护程序

将exe文件更改后缀名为scr，右键->安装。

做一些变化

   1: float circle_x = (float) 0.0;

   2: float circle_y = (float) 0.0;

   3: float circle_radius = (float) 0.0;

   4: int circle_color = 0;

   5:  

   6: public void setup() {

   7:     size(displayWidth, displayHeight);

   8:     background(0);

   9:     frameRate(10);

  10: }

  11:  

  12: public void draw() {

  13:     

  14:       circle_x = random(0, displayWidth);

  15:       circle_y = random(0, displayHeight);

  16:       circle_radius = random(0, (displayWidth + displayHeight) / 5);

  17:       

  18:       circle_color = (int) random(0, 255);

  19:       

  20:       colorMode(RGB, 255);

  21: //      fill(0,0,0,5);

  22: //      rect(-1, -1, displayWidth+1, displayHeight+1);

  23:       

  24:       //noStroke();

  25:       colorMode(HSB, 255);

  26:       stroke(circle_color, 255, 255);

  27:       fill(circle_color, 255, 255);

  28:       noFill();

  29:       ellipse(circle_x, circle_y, circle_radius, circle_radius);

  30:       ellipse(circle_x, circle_y, circle_radius-1, circle_radius-1);

  31:         

  32: }

截图

运动的泡泡

   1: public static final int circle_nums = 200;

   2:  

   3: class BCircle

   4: {

   5:     public BCircle(float x, float y, float radius, float x_delta, float y_delta, int color) {

   6:         super();

   7:         this.x = x;

   8:         this.y = y;

   9:         this.radius = radius;

  10:         this.x_delta = x_delta;

  11:         this.y_delta = y_delta;

  12:         this.color = color;

  13:     }

  14:     private float x = (float) 0.0;

  15:     private float y = (float) 0.0;

  16:     private float radius = (float) 0.0;

  17:     

  18:     private float x_delta = (float) 0.0;

  19:     private float y_delta = (float) 0.0;    

  20:     private int color = 0; // 0 - 255

  21:     

  22:     private boolean valueInRange(float val, float min, float max)

  23:     {

  24:         return (val >= min >> val < max);

  25:     }

  26:     

  27:     public void moveOneStep()

  28:     {

  29:         if (valueInRange(x+x_delta, 0, displayWidth) >> 

  30:                 valueInRange(y+y_delta, 0, displayHeight))

  31:         {

  32:             x += x_delta;

  33:             y += y_delta;

  34:         }

  35:  

  36:         if (!valueInRange(x+x_delta, 0, displayWidth))

  37:         {

  38:             x_delta = -x_delta;

  39:             x += x_delta;

  40:         }

  41:         

  42:         if (!valueInRange(y+y_delta, 0, displayHeight))

  43:         {

  44:             y_delta = - y_delta;

  45:             y += y_delta;

  46:         }

  47:             

  48:     }

  49:     

  50:     public void draw(int theme)

  51:     {      

  52:         switch(theme)

  53:         {

  54:             case 1:

  55:             {

  56:                 noFill();

  57:                 colorMode(HSB, 255);

  58:                 stroke(color, 255, 255);

  59:                 ellipse(x, y, radius+2, radius+2);

  60:                 ellipse(x, y, radius+1, radius+1);

  61:                 ellipse(x, y, radius, radius);

  62:             }

  63:             break;

  64:             case 2:

  65:             {

  66:                 colorMode(HSB, 255);

  67:                 fill(color, 255, 255);

  68:                 ellipse(x, y, radius+2, radius+2);

  69:                 ellipse(x, y, radius+1, radius+1);

  70:                 ellipse(x, y, radius, radius);

  71:             }

  72:         }

  73:         

  74:     }

  75: }

  76:  

  77: List<BCircle> circles;

  78:  

  79: public void setup() {

  80:   size(displayWidth, displayHeight);

  81:   background(0);

  82:   frameRate(10);

  83:   

  84:   circles = new ArrayList<BCircle>(circle_nums);

  85: }

  86:  

  87: public void draw() {

  88:   

  89:     colorMode(RGB, 255);

  90:     fill(0,0,0,30);

  91:     rect(-1, -1, displayWidth+1, displayHeight+1);

  92:     

  93:     if (circles.size() < circle_nums)

  94:     {

  95:         float x = random(0, displayWidth);

  96:         float y = random(0, displayHeight);

  97:         float radius = random(20, (displayWidth + displayHeight) / 20);

  98:         float x_delta = random(-50, 50); 

  99:         float y_delta = random(-50, 50);

 100:         int color = (int) random(0, 255);

 101:         BCircle circle = new BCircle(x, y, radius, x_delta, y_delta, color);

 102:         

 103:         circles.add(circle);

 104:     }

 105:     

 106:     for(int i=0;i<circles.size();i++)

 107:     {

 108:         circles.get(i).moveOneStep();

 109:         circles.get(i).draw(1);

 110:     }    

 111: }

两种主题，截图