PHP绘制3D图形 之 自定义图形及矢量图

上一篇进行了一些简单3D图形实例,本篇介绍自定义及矢量图实例。首先绘制一个三尖角星体,分别由“前面”,“后面”和三个“侧面”组成。

 

自定义多边形

 

代码:

<?php
require_once('Image/3D.php');
$image = new Image_3D();
$image->setColor(new Image_3D_Color(255, 255, 255));
//创建光源
$light1 = $image->createLight('light',array(-50, -50, -50));
$light1->setColor(new Image_3D_Color(100, 250, 100));

$light2 = $image->createLight('light',array(50, -50, 0));
$light2->setColor(new Image_3D_Color(100, 100, 250));

$light3 = $image->createLight('light',array(50, 50, 0));
$light3->setColor(new Image_3D_Color(50, 0, 100));

//创建多边形数组
$polygons = array();

//前面点坐标
$polygons[] = array(
                array(0, -120, 0), array(-18, -12, 0), 
                array(-86, 48, 0), array(0, 18, 0), 
                array(86, 48, 0),  array(18, -12, 0)
              );

//后面点坐标
$polygons[] = array(
                array(0, -120, 60), array(-18, -12, 60), 
                array(-86, 48, 60), array(0, 18, 60), 
                array(86, 48, 60),  array(18, -12, 60)
              );

//三侧面点坐标
$polygons[] = array(
                array(0, -120, 0),  array(-18, -12, 0), 
                array(-86, 48, 0),  array(-86, 48, 60), 
                array(-18, -12, 60),array(0, -120, 60)
              );
$polygons[] = array(
                array(-86, 48, 0), array(0, 18, 0), 
                array(86, 48, 0),  array(86, 48, 60), 
                array(0, 18, 60),  array(-86, 48, 60)
              );
$polygons[] = array(
                array(86, 48, 0),  array(18, -12, 0), 
                array(0, -120, 0), array(0, -120, 60), 
                array(18, -12, 60),array(86, 48, 60)
              );

//绘制3D图像
foreach ($polygons as $poly) {
    $points = array();
    foreach ($poly as $set) {
        $points[] = new Image_3D_Point($set[0], $set[1], $set[2]);
    }
    $p = $image->createObject('polygon', $points);
    $p->setColor(new Image_3D_Color(255, 255, 255));
}

$image->transform($image->createMatrix('Rotation', array(-10, -25, -15)));
$image->createRenderer('perspectively');
$image->createDriver('gd');
$image->render(300, 300, 'anim.png');
echo '<img src="anim.png">';
?>

效果图:

anim

矢量图

       可缩放的矢量图形(Scalable Vector Graphics,SVG)文件格式是组成2D图像的矢量XML文件。 在2001年,W3C对该格式进行了标准化,但其在Web方面的使用因为浏览器显示SVG文件的牵制而不很流行。 目前,最好的选择是Firefox它有内置的SVG支持,或具有Adobe SVG插件的IE。下面通过一个实例生成SVG文件。

代码:

<?php
require_once('Image/3D.php');

$rot_x = 45;
$rot_y = 45;
$rot_z = 10;

$image = new Image_3D();
$image->setColor(new Image_3D_Color(255, 255, 255));

for ($x=0; $x < 4; $x++) {
  for ($y=0; $y < 4; $y++) {
    for ($z=0; $z < 4; $z++) {
      //创建球体
      $sphere = $image->createObject('sphere', array('r' => 25, 'detail' => 3));
      //后面150用于设置图像透明度
      $sphere->setColor(new Image_3D_Color(255, 162, 0, 150));
      $sphere->transform($image->createMatrix('Move', array(($x * 75) + 50, $y * 75, $z * 75)));
      $sphere->transform($image->createMatrix('Rotation', array($rot_x, $rot_y, $rot_z)));
    }
  }
}

$image->transform($image->createMatrix('Move', array(-225, -100, 0)));
$image->createRenderer('perspectively');
//使用SVG驱动生成矢量图
$image->createDriver('svg');
$image->render(600, 600, 'anim.svg');
header('Location:anim.svg');
?>

效果图:

2009-8-27-16.20.12

输出的SVG文件打开后,其格式即为XML:

<?xml version="1.0" ?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
         "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">

<svg xmlns="http://www.w3.org/2000/svg" x="0" y="0" width="600" height="600">

    <defs id="defs16387">
    </defs>

    <polygon id="background1" points="0,0 600,0 600,600 0,600" 
            style="fill: #ffffff; fill-opacity: 1.00; stroke: none;" />
    <polygon points="325.87,264.90 323.53,258.51 321.87,262.52" 
            style="fill: #ffa200; fill-opacity: 0.41; stroke: none;" />
    <polygon points="319.40,256.07 321.87,262.52 323.53,258.51" 
            style="fill: #ffa200; fill-opacity: 0.41; stroke: none;" />
    ... ...
    <polygon points="230.72,174.08 236.47,190.12 226.95,185.47" 
            style="fill: #ffa200; fill-opacity: 0.41; stroke: none;" />
    <polygon points="230.72,174.08 252.69,180.70 236.47,190.12" 
            style="fill: #ffa200; fill-opacity: 0.41; stroke: none;" />
</svg>


posted @ 2009-08-27 16:45  Gnie  阅读(3100)  评论(7编辑  收藏  举报
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