projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | <!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Strict//EN' |
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| 3 | <html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en' lang='en'> | |
| 4 | <head> | |
| 5 | <meta http-equiv='Content-Type' content='text/html; charset=utf-8'/> | |
| 6 | <title>Views</title> | |
| 7 | <link href='reno.css' type='text/css' rel='stylesheet'/> | |
| 8 | </head> | |
| 9 | <body> | |
| 10 | <div class="body-0"> | |
| 11 | <div class="body-1"> | |
| 12 | <div class="body-2"> | |
| 13 | <div> | |
| 14 | <h1>QVM: Quaternions, Vectors, Matrices</h1> | |
| 15 | </div> | |
| 16 | <!-- Copyright (c) 2008-2016 Emil Dotchevski and Reverge Studios, Inc. --> | |
| 17 | <!-- Distributed under the Boost Software License, Version 1.0. (See accompanying --> | |
| 18 | <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) --> | |
| 19 | <div class="RenoIncludeDIV"><div class="RenoAutoDIV"><h3>Views</h3> | |
| 20 | </div> | |
| 21 | <p>Boost QVM defines various function templates that provide static mapping between (possibly user-defined) quaternion, vector and matrix types. The example below multiplies column 1 (Boost QVM indexes are always zero-based) of the matrix <i>m</i> by a scalar:</p> | |
| 22 | <pre>void multiply_column1( float33 & m, float scalar ) | |
| 23 | { | |
| 24 | <span class="RenoLink"><a href="col.html">col</a></span><1>(m) <span class="RenoLink"><a href="operator_mul_eq_vec_scalar_.html">*=</a></span> scalar; | |
| 25 | }</pre> | |
| 26 | <p>The expression <i><span class="RenoLink"><a href="col.html">col</a></span><1>(m)</i> is a lvalue of an unspecified 3D vector type that refers to column 1 of <i>m</i>. Note however that this does not create any temporary objects; instead <i><span class="RenoLink"><a href="operator_mul_eq_vec_scalar_.html">operator*=</a></span></i> above works directly with a reference to <i>m</i>.</p> | |
| 27 | <p>Here is another example, multiplying a transposed view of a matrix by a vector of some user-defined type <i>float3</i>:</p> | |
| 28 | <pre>float3 v = {0,0,7}; | |
| 29 | float3 vrot = <span class="RenoLink"><a href="transposed.html">transposed</a></span>(<span class="RenoLink"><a href="rotx_mat_scalar_.html">rotx_mat</a></span><3>(3.14159f)) <span class="RenoLink"><a href="operator_times_mat_vec_.html">*</a></span> v;</pre> | |
| 30 | <p>In general, the various view functions return references of unspecified, non-copyable types that refer to the original object. They can be assigned from or converted to any compatible vector or matrix type.</p> | |
| 31 | <p>For more details, see <span class="RenoLink"><a href="view_proxy.html">View Proxies</a></span>.</p> | |
| 32 | </div><div class="RenoIncludeDIV"><div class="RenoHR"><hr/></div> | |
| 33 | <p><b>Tutorial navigation:</b> <span class="RenoLink"><a href="quaternions_vectors_matrices.html">Quaternions, Vectors, Matrices</a></span> | <span class="RenoLink"><a href="c_arrays.html">C Arrays</a></span> | <span class="RenoLink">Views</span> | <span class="RenoLink"><a href="Swizzling.html">Swizzling</a></span> | <span class="RenoLink"><a href="Interoperability.html">Interoperability</a></span><span class="RenoBR"> </span><br/><span class="RenoBR"> </span><br/>See also: <span class="RenoLink"><a href="index.html">Boost QVM</a></span></p> | |
| 34 | </div><!-- Copyright (c) 2008-2016 Emil Dotchevski and Reverge Studios, Inc. --> | |
| 35 | <!-- Distributed under the Boost Software License, Version 1.0. (See accompanying --> | |
| 36 | <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) --> | |
| 37 | <div id="footer"> | |
| 38 | <p> | |
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| 41 | <small>Copyright (c) 2008-2016 by Emil Dotchevski and Reverge Studios, Inc.<br/> | |
| 42 | Distributed under the <a href="http://www.boost.org/LICENSE_1_0.txt">Boost Software License, Version 1.0</a>.</small> | |
| 43 | </p> | |
| 44 | </div> | |
| 45 | </div> | |
| 46 | </div> | |
| 47 | </div> | |
| 48 | </body> | |
| 49 | </html> |