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<a href="math_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/* This code is (C) AllegroGL contributors, and double licensed under</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * the GPL and zlib licenses. See gpl.txt or zlib.txt for details.</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> */</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <math.h></span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <allegro.h></span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include "<a class="code" href="alleggl_8h.html">alleggl.h</a>"</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include "allglint.h"</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#ifndef M_PI</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor"> #define M_PI 3.14159265358979323846</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#define ALGL_NOCONV(x) x</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#define TRANSLATE_AL_TO_GL(al_type, gl_type, convertor) \</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor"> void allegro_gl_##al_type##_to_##gl_type (al_type *m, gl_type gl[16]) \</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor"> { \</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor"> int col, row; \</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor"> for (col = 0; col < 3; col++) \</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor"> for (row = 0; row < 3; row++) \</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor"> gl[col*4+row] = convertor (m->v[col][row]); \</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor"> for (row = 0; row < 3; row++) \</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor"> gl[12+row] = convertor (m->t[row]); \</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor"> for (col = 0; col < 3; col++) \</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor"> gl[4*col + 3] = 0; \</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor"> gl[15] = 1; \</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor"> }</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div><div class="line"><a name="l00066"></a><span class="lineno"><a class="line" href="group__math.html#ga4cf4f453cb3f95a1e7e861a7401b4a8d"> 66</a></span> TRANSLATE_AL_TO_GL(MATRIX, GLfloat, fixtof)</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  </div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div><div class="line"><a name="l00082"></a><span class="lineno"><a class="line" href="group__math.html#gaee6cb48f8e3e70abecc6c282a8ea1edc"> 82</a></span> TRANSLATE_AL_TO_GL(MATRIX, GLdouble, fixtof)</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  </div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> </div><div class="line"><a name="l00098"></a><span class="lineno"><a class="line" href="group__math.html#gae8e0ee18b9aeca955402be16de6ca79d"> 98</a></span> TRANSLATE_AL_TO_GL(MATRIX_f, GLfloat, ALGL_NOCONV)</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div><div class="line"><a name="l00114"></a><span class="lineno"><a class="line" href="group__math.html#ga983a72d7910e4f792e1689ccd13e1f0a"> 114</a></span> TRANSLATE_AL_TO_GL(MATRIX_f, GLdouble, ALGL_NOCONV)</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  </div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="preprocessor">#define TRANSLATE_GL_TO_AL(gl_type, al_type, convertor) \</span></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="preprocessor"> void allegro_gl_##gl_type##_to_##al_type (gl_type gl[16], al_type *m) \</span></div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="preprocessor"> { \</span></div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="preprocessor"> int col, row; \</span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="preprocessor"> for (col = 0; col < 3; col++) \</span></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="preprocessor"> for (row = 0; row < 3; row++) \</span></div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="preprocessor"> m->v[col][row] = convertor (gl[col*4+row]); \</span></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="preprocessor"> for (row = 0; row < 3; row++) \</span></div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="preprocessor"> m->t[row] = convertor (gl[12+row]); \</span></div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="preprocessor"> }</span></div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> </div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> </div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> </div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span> TRANSLATE_GL_TO_AL(GLfloat, MATRIX, ftofix)</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> </div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span> </div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> </div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span> TRANSLATE_GL_TO_AL(GLdouble, MATRIX, ftofix)</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span> </div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span> </div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> </div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> TRANSLATE_GL_TO_AL(GLfloat, MATRIX_f, ALGL_NOCONV)</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> </div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  </div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> </div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span> TRANSLATE_GL_TO_AL(GLdouble, MATRIX_f, ALGL_NOCONV)</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span> </div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span> </div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="preprocessor">#undef ALGL_NOCONV</span></div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span> </div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span> </div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="preprocessor">#ifndef RAD_2_DEG</span></div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="preprocessor"> #define RAD_2_DEG(a) ((a) * 180 / M_PI)</span></div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> </div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  </div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span> </div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="comment">/* void allegro_gl_apply_quat(QUAT *q) */</span></div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="keywordtype">void</span> <a class="code" href="group__math.html#gaa83a678516d8a7a5503a2b0c9014cb64">allegro_gl_apply_quat</a>(QUAT *q) {</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span> </div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="keywordtype">float</span> theta;</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  ASSERT(q);</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  ASSERT(__allegro_gl_valid_context);</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span> </div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  theta = RAD_2_DEG(2 * acos(q->w));</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordflow">if</span> (q->w < 1.0f && q->w > -1.0f) </div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  glRotatef(theta, q->x, q->y, q->z); </div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span> </div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span> }</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span> </div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span> </div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> </div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="comment">/* void allegro_gl_quat_to_glrotatef(QUAT *q, float *angle, float *x, float *y, float *z) */</span></div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="keywordtype">void</span> <a class="code" href="group__math.html#gab00b667363181a8f0853121170bebaca">allegro_gl_quat_to_glrotatef</a>(QUAT *q, <span class="keywordtype">float</span> *angle, <span class="keywordtype">float</span> *x, <span class="keywordtype">float</span> *y, <span class="keywordtype">float</span> *z) {</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span> </div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  ASSERT(q);</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  ASSERT(angle);</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  ASSERT(x);</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  ASSERT(y);</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  ASSERT(z);</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span> </div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  *angle = RAD_2_DEG(2 * acos(q->w));</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  *x = q->x;</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  *y = q->y;</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  *z = q->z;</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span> </div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span> }</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span> </div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span> </div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span> </div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span> <span class="comment">/* void allegro_gl_quat_to_glrotated(QUAT *q, double *angle, double *x, double *y, double *z) */</span></div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span> <span class="keywordtype">void</span> <a class="code" href="group__math.html#ga956160418e1c0c37143dd3cee54477ce">allegro_gl_quat_to_glrotated</a>(QUAT *q, <span class="keywordtype">double</span> *angle, <span class="keywordtype">double</span> *x, <span class="keywordtype">double</span> *y, <span class="keywordtype">double</span> *z) {</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span> </div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  ASSERT(q);</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  ASSERT(angle);</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  ASSERT(x);</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  ASSERT(y);</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  ASSERT(z);</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span> </div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  *angle = RAD_2_DEG(2 * acos(q->w));</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  *x = q->x;</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  *y = q->y;</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  *z = q->z;</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span> </div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span> }</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span> </div><div class="ttc" id="group__math_html_gaa83a678516d8a7a5503a2b0c9014cb64"><div class="ttname"><a href="group__math.html#gaa83a678516d8a7a5503a2b0c9014cb64">allegro_gl_apply_quat</a></div><div class="ttdeci">void allegro_gl_apply_quat(QUAT *q)</div><div class="ttdoc">Converts a quaternion to a vector/angle, which can be used with glRotate*(). </div></div>
<div class="ttc" id="group__math_html_gab00b667363181a8f0853121170bebaca"><div class="ttname"><a href="group__math.html#gab00b667363181a8f0853121170bebaca">allegro_gl_quat_to_glrotatef</a></div><div class="ttdeci">void allegro_gl_quat_to_glrotatef(QUAT *q, float *angle, float *x, float *y, float *z)</div><div class="ttdoc">Converts a quaternion to a vector/angle, which can be used with glRotate*(). </div><div class="ttdef"><b>Definition:</b> <a href="math_8c_source.html#l00250">math.c:250</a></div></div>
<div class="ttc" id="alleggl_8h_html"><div class="ttname"><a href="alleggl_8h.html">alleggl.h</a></div><div class="ttdoc">Main header file for AllegroGL. </div></div>
<div class="ttc" id="group__math_html_ga956160418e1c0c37143dd3cee54477ce"><div class="ttname"><a href="group__math.html#ga956160418e1c0c37143dd3cee54477ce">allegro_gl_quat_to_glrotated</a></div><div class="ttdeci">void allegro_gl_quat_to_glrotated(QUAT *q, double *angle, double *x, double *y, double *z)</div><div class="ttdoc">Converts a quaternion to a vector/angle, which can be used with glRotate*(). </div><div class="ttdef"><b>Definition:</b> <a href="math_8c_source.html#l00282">math.c:282</a></div></div>
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