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<div class="title">GLM_GTC_type_ptr: Memory layout access</div> </div>
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<div class="ingroups"><a class="el" href="a00134.html">GTC Extensions (Stable)</a></div></div><!--header-->
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<p>Handles the interaction between pointers and vector, matrix types. </p>
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<p>This extension defines an overloaded function, glm::value_ptr, which takes any of the <a class="el" href="a00140.html">core template types</a>. It returns a pointer to the memory layout of the object. Matrix types store their values in column-major order.</p>
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<p>This is useful for uploading data to matrices or copying data to buffer objects.</p>
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<p>Example: </p>
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<div class="fragment"><pre class="fragment"><span class="preprocessor"> #include <<a class="code" href="a00034.html" title="OpenGL Mathematics (glm.g-truc.net)">glm/glm.hpp</a>></span>
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<span class="preprocessor"> #include <<a class="code" href="a00107.html" title="OpenGL Mathematics (glm.g-truc.net)">glm/gtc/type_ptr.hpp</a>></span>
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<a class="code" href="a00138.html#ga8a44105c47072f9ea1413f15faa31f64" title="3 components vector of floating-point numbers.">glm::vec3</a> aVector(3);
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<a class="code" href="a00138.html#gade0eb47c01f79384a6f38017ede17446" title="4 columns of 4 components matrix of floating-point numbers.">glm::mat4</a> someMatrix(1.0);
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glUniform3fv(uniformLoc, 1, glm::value_ptr(aVector));
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glUniformMatrix4fv(uniformMatrixLoc, 1, GL_FALSE, glm::value_ptr(someMatrix));
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</pre></div><p><<a class="el" href="a00107.html" title="OpenGL Mathematics (glm.g-truc.net)">glm/gtc/type_ptr.hpp</a>> need to be included to use these functionalities. </p>
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