PHP 5.0创建图形的实用方法完整篇第3/3页

 
$g1 = new Group( 0 ); 
$g1->add( new Oval( 200, "red", 0.1, 0.1, 0.5, 0.5 ) ); 
$g1->add( new Rectangle( 100, "black", 0.4, 0.4, 0.9, 0.9 ) ); 

 
class GraphicsEnvironment 
{ 
 public $vsx; 
 public $vsy; 
 public $vex; 
 public $vey; 
 public $width; 
 public $height; 
 public $gdo; 
 public $colors = array(); 
 public function __construct( $width, $height, 
 $vsx, $vsy, $vex, $vey ) 
 { 
 $this->vsx = $vsx; 
 $this->vsy = $vsy; 
 $this->vex = $vex; 
 $this->vey = $vey; 
 $this->width = $width; 
 $this->height = $height; 
 $this->gdo = imagecreatetruecolor( $width, $height ); 
 $this->addColor( "white", 255, 255, 255 ); 
 imagefilledrectangle( $this->gdo, 0, 0, 
  $width, $height, 
  $this->getColor( "white" ) ); 
 } 
 public function width() { return $this->width; } 
 public function height() { return $this->height; } 
 public function addColor( $name, $r, $g, $b ) 
 { 
 $this->colors[ $name ] = imagecolorallocate( 
  $this->gdo, 
  $r, $g, $b ); 
 } 
 public function getGraphicObject() 
 { 
 return $this->gdo; 
 } 
 public function getColor( $name ) 
 { 
 return $this->colors[ $name ]; 
 } 
 public function saveAsPng( $filename ) 
 { 
 imagepng( $this->gdo, $filename ); 
 } 
 public function tx( $x ) 
 { 
 $r = $this->width / ( $this->vex - $this->vsx ); 
 return ( $x - $this->vsx ) * $r; 
 } 
 public function ty( $y ) 
 { 
 $r = $this->height / ( $this->vey - $this->vsy ); 
 return ( $y - $this->vsy ) * $r; 
 } 
} 

 
<?php 
require_once( "glib.php" ); 
$ge = new GraphicsEnvironment( 400, 400, 
 -1000, -1000, 1000, 1000 ); 
$ge->addColor( "black", 0, 0, 0 ); 
$ge->addColor( "red", 255, 0, 0 ); 
$ge->addColor( "green", 0, 255, 0 ); 
$ge->addColor( "blue", 0, 0, 255 ); 
$g1 = new Group( 0 ); 
$g1->add( new Oval( 200, "red", -800, -800, 0, 0 ) ); 
$g1->add( new Rectangle( 100, "black", -400, -400, 900, 900 ) ); 
$g1->render( $ge ); 
$ge->saveAsPng( "test.png" ); 
?> 

 
$ge = new GraphicsEnvironment( 400, 200, 
 -1000, -1000, 1000, 1000 );