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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: 'WebGLRenderingContext.uniformMatrix[234]fv()'
+slug: Web/API/WebGLRenderingContext/uniformMatrix
+tags:
+ - WebGL
+ - WebGLAPI
+ - WebGLRenderingContext
+ - uniformMatrix2fv
+ - uniformMatrix3fv
+ - uniformMatrix4fv
+ - 矩阵
+translation_of: Web/API/WebGLRenderingContext/uniformMatrix
+---
+<div>{{APIRef("WebGL")}}</div>
+
+<p><a href="/en-US/docs/Web/API/WebGL_API">WebGL API</a> 的<strong><code>WebGLRenderingContext.uniformMatrix[234]fv()</code></strong> 方法为 uniform variables 指定了矩阵值 .</p>
+
+<p>该方法的3个版本 (<code>uniformMatrix2fv()</code>, <code>uniformMatrix3fv()</code>, 和<code>unifomMatrix4fv()</code>) ,分别以二阶,三阶,和四阶方阵作为输入值,它们应是分别具有4,9,16个浮点数的数组.</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><em>WebGLRenderingContext</em>.uniformMatrix2fv(<em>location</em>, <em>transpose</em>, <em>value</em>);
+<em>WebGLRenderingContext</em>.uniformMatrix3fv(<em>location</em>, <em>transpose</em>, <em>value</em>);
+<em>WebGLRenderingContext</em>.uniformMatrix4fv(<em>location</em>, <em>transpose</em>, <em>value</em>);
+</pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt><code>location</code></dt>
+ <dd>{{domxref("WebGLUniformLocation")}} 对象包含了要修改的 uniform attribute位置. 位置使用 {{domxref("WebGLRenderingContext.getUniformLocation", "getUniformLocation()")}}获得.</dd>
+ <dt><code>transpose</code></dt>
+ <dd>{{domxref("GLboolean")}} 指定是否转置矩阵。必须为 <code>false</code>.</dd>
+ <dt><code>value</code></dt>
+ <dd>
+ <p> {{jsxref("Float32Array")}} 型或者是 <code>GLfloat</code> 序列值.假定值以列主要顺序提供.</p>
+ </dd>
+</dl>
+
+<h3 id="返回值">返回值</h3>
+
+<p><code>undefined</code></p>
+
+<h2 id="示例">示例</h2>
+
+<pre class="brush: js">gl.uniformMatrix2fv(loc, false, [2,1, 2,2]);</pre>
+
+<h2 id="说明">说明</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">Specification</th>
+ <th scope="col">Status</th>
+ <th scope="col">Comment</th>
+ </tr>
+ <tr>
+ <td>{{SpecName('WebGL', "#5.14.10", "uniformMatrix")}}</td>
+ <td>{{Spec2('WebGL')}}</td>
+ <td>Initial definition.</td>
+ </tr>
+ <tr>
+ <td>{{SpecName('OpenGL ES 2.0', "glUniform.xml", "glUniform")}}</td>
+ <td>{{Spec2('OpenGL ES 2.0')}}</td>
+ <td>Man page of the OpenGL API.</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<p class="hidden">The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> and send us a pull request.</p>
+
+<p>{{Compat("api.WebGLRenderingContext.uniformMatrix2fv")}}</p>
+
+<h2 id="另见">另见</h2>
+
+<ul>
+ <li>{{domxref("WebGLRenderingContext.uniform()")}}</li>
+ <li>{{domxref("WebGL2RenderingContext.uniformMatrix()")}} – WebGL 2 versions of these methods.</li>
+</ul>