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58 lines
2.7 KiB
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58 lines
2.7 KiB
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<li class="navelem"><a class="el" href="index.html">OpenGL Mathematics</a> </li>
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<div class="title">Known Issues </div> </div>
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<div class="contents">
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<div class="textblock"><h2><a class="anchor" id="issue1"></a>
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not Function</h2>
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<p>The GLSL keyword not is also a keyword in C++. To prevent name collisions, the GLSL not function has been implemented with the name not_.</p>
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<h2><a class="anchor" id="issue2"></a>
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Half Based Types</h2>
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<p>GLM supports half float number types through the extension GLM_GTC_half_float. This extension provides the types half, hvec*, hmat*x* and hquat*.</p>
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<p>Unfortunately, C++ 98 specification doesn<73>t support anonymous unions which limit hvec* vector components access to x, y, z and w.</p>
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<p>However, Visual C++ does support anonymous unions if the language extensions are enabled (/Za to disable them). In this case GLM will automatically enables the support of all component names (x,y,z,w ; r,g,b,a ; s,t,p,q).</p>
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<p>To uniformalize the component access across types, GLM provides the define GLM_FORCE_ONLY_XYZW which will generates errors if component accesses are done using r,g,b,a or s,t,p,q.</p>
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<div class="fragment"><pre class="fragment"><span class="preprocessor">#define GLM_FORCE_ONLY_XYZW </span>
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<span class="preprocessor">#include <glm/glm.hpp></span>
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</pre></div> </div></div>
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