PHP绘制3D图形

PEAR提供了Image_3D Package来创建3D图像。图像或光线在3D空间中按照X、Y 、Z 坐标定位。生成的图像将呈现在2D空间中，可以存储为 PNG、SVG 格式，或输出到Shell。通过Image_3D可以很方便生成一些简单的3D对象，例如立方体、锥体、球体、文本和饼图。查了一

       PEAR提供了Image_3D Package来创建3D图像。图像或光线在3D空间中按照X、Y 、Z 坐标定位。生成的图像将呈现在2D空间中，可以存储为 PNG、SVG 格式，或输出到Shell。通过Image_3D可以很方便生成一些简单的3D对象，例如立方体、锥体、球体、文本和饼图。查了一下PEAR文档关于Image_3D的实例一个也没有～囧～，只好自己研究一下，将经验分享给大家，请多多拍砖。言归正传，Image_3D需要PEAR和GD(配置php.ini)的支持。

1. 安装Image_3D

下载Image_3D Package ，目前最新版本为：0.4.1 alpha

官方下载：http://pear.php.net/package/Image_3D/download

将压缩包放到有pear.bat的目录中，例如：c:\php，若是WAMP5的话则为c:\wamp\php。

执行 pear install Image_3D-0.4.1.gz  安装Package：

安装完毕，Image_3D会在 C:\wamp\php\PEAR\Image 目录中。

2. 3D坐标系

Image_3D的坐标系及旋转请参考下图，用于缩放、旋转或移动物体：

3. 绘制圆锥体

代码如下：

<span><?php </span><span>//调用3D图形类
</span><span>require_once</span><span>(</span><span>'Image/3D.php'</span><span>)</span>;

<span>//创建一个三维空间
</span><span>$image </span><span>= </span><span>new </span>Image_3D<span>()</span>;
<span>$image</span><span>-></span>setColor<span>(</span><span>new </span>Image_3D_Color<span>(</span><span>255</span><span>, </span><span>255</span><span>, </span><span>255</span><span>))</span>;

<span>//在坐标系左下方创建一个红色光点
</span><span>$light1 </span><span>= </span><span>$image</span><span>-></span>createLight<span>(</span><span>"Light"</span><span>,</span><span>array</span><span>(-</span><span>100</span><span>, </span><span>100</span><span>, -</span><span>100</span><span>))</span>;
<span>$light1</span><span>-></span>setColor<span>(</span><span>new </span>Image_3D_Color<span>(</span><span>255</span><span>, </span><span>0</span><span>, </span><span>0</span><span>))</span>;

<span>//在坐标系右上方创建一个绿色光点
</span><span>$light2 </span><span>= </span><span>$image</span><span>-></span>createLight<span>(</span><span>"Light"</span><span>,</span><span>array</span><span>(</span><span>100</span><span>, -</span><span>200</span><span>, -</span><span>50</span><span>))</span>;
<span>$light2</span><span>-></span>setColor<span>(</span><span>new </span>Image_3D_Color<span>(</span><span>0</span><span>, </span><span>200</span><span>, </span><span>0</span><span>))</span>;

<span>//创建3D圆锥体
</span><span>$cone </span><span>= </span><span>$image</span><span>-></span>createObject<span>(</span><span>'cone'</span><span>,</span><span>array</span><span>(</span><span>'detail'</span>=><span>360</span><span>))</span>;
<span>$cone</span><span>-></span>setColor<span>(</span><span>new </span>Image_3D_Color<span>(</span><span>255</span><span>, </span><span>255</span><span>, </span><span>255</span><span>))</span>;
<span>//按X,Y,Z轴缩放
</span><span>$cone</span><span>-></span>transform<span>(</span><span>$image</span><span>-></span>createMatrix<span>(</span><span>'scale'</span><span>, </span><span>array</span><span>(</span><span>80</span><span>, </span><span>150</span><span>, </span><span>80</span><span>)))</span>;
<span>//按X,Y,Z轴旋转
</span><span>$cone</span><span>-></span>transform<span>(</span><span>$image</span><span>-></span>createMatrix<span>(</span><span>'rotation'</span><span>, </span><span>array</span><span>(</span><span>15</span><span>, </span><span>0</span><span>, </span><span>20</span><span>)))</span>;
<span>//按X,Y,Z轴移动
</span><span>$cone</span><span>-></span>transform<span>(</span><span>$image</span><span>-></span>createMatrix<span>(</span><span>'move'</span><span>, </span><span>array</span><span>(</span><span>0</span><span>, -</span><span>50</span><span>, </span><span>0</span><span>)))</span>;

<span>//创建2D输出图像
//渲染效果，Image_3D共提供了种效果：Isometric，Perspectively，Raytrace
//参考...\PEAR\Image\3D\Renderer目录
</span><span>$image</span><span>-></span>createRenderer<span>(</span><span>'perspectively'</span><span>)</span>;
<span>//图像驱动，也可以SVG，ASCII等
//参考...\PEAR\Image\3D\Driver目录
</span><span>$image</span><span>-></span>createDriver<span>(</span><span>'gd'</span><span>)</span>;
<span>//创建输出图片名称及大小
</span><span>$image</span><span>-></span>render<span>(</span><span>400</span><span>, </span><span>300</span><span>, </span><span>'object.png'</span><span>)</span>;
<span>//显示效果图
</span><span>echo </span><span>'<img  src="object.png" alt="PHP绘制3D图形" >'</span>;
<span>?></span></span>

效果图：

4. 3D文字效果

将上例创建3D圆锥体部分代码替换为：

<span>//创建3D字体
</span><span>$text </span><span>= </span><span>$image</span><span>-></span>createObject<span>(</span><span>'text'</span><span>,</span><span>'cnblogs'</span><span>)</span>;
<span>$text</span><span>-></span>setColor<span>(</span><span>new </span>Image_3D_Color<span>(</span><span>255</span><span>, </span><span>255</span><span>, </span><span>255</span><span>))</span>;
<span>$text</span><span>-></span>transform<span>(</span><span>$image</span><span>-></span>createMatrix<span>(</span><span>'scale'</span><span>, </span><span>array</span><span>(</span><span>10</span><span>, </span><span>10</span><span>, </span><span>20</span><span>)))</span>;
<span>$text</span><span>-></span>transform<span>(</span><span>$image</span><span>-></span>createMatrix<span>(</span><span>'rotation'</span><span>, </span><span>array</span><span>(</span><span>20</span><span>, </span><span>0</span><span>, </span><span>20</span><span>)))</span>;
<span>$text</span><span>-></span>transform<span>(</span><span>$image</span><span>-></span>createMatrix<span>(</span><span>'move'</span><span>, </span><span>array</span><span>(-</span><span>150</span><span>, -</span><span>100</span><span>, </span><span>0</span><span>)))</span>;

效果图：

源代码下载：