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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="preprocessor">#include "frustum.h"</span></div>
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<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span> </div>
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<div class="foldopen" id="foldopen00003" data-start="{" data-end="}">
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<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"><a class="line" href="classfrustum.html#a17fbc652d86a362739d01c66ab8aa036"> 3</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classfrustum.html#a17fbc652d86a362739d01c66ab8aa036">frustum::ConstructFrustum</a>(<span class="keywordtype">float</span> screenDepth, XMMATRIX projectionMatrix, XMMATRIX viewMatrix)</div>
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<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span>{</div>
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<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span> XMMATRIX matrix;</div>
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<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span> XMVECTOR planes[6];</div>
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<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span> </div>
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<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// Calculate the minimum Z distance in the frustum.</span></div>
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<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span> <span class="keywordtype">float</span> zMinimum = -projectionMatrix.r[3].m128_f32[2] / projectionMatrix.r[2].m128_f32[2];</div>
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<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span> <span class="keywordtype">float</span> r = screenDepth / (screenDepth - zMinimum);</div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span> projectionMatrix.r[2].m128_f32[2] = r;</div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span> projectionMatrix.r[3].m128_f32[2] = -r * zMinimum;</div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> </div>
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<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span> <span class="comment">// Create the frustum matrix from the view matrix and updated projection matrix.</span></div>
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> matrix = XMMatrixMultiply(viewMatrix, projectionMatrix);</div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> </div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span> <span class="comment">// Calculate near plane of frustum.</span></div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> planes[0] = XMPlaneNormalize(XMVectorSet(matrix.r[0].m128_f32[3] + matrix.r[0].m128_f32[2],</div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> matrix.r[1].m128_f32[3] + matrix.r[1].m128_f32[2],</div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> matrix.r[2].m128_f32[3] + matrix.r[2].m128_f32[2],</div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> matrix.r[3].m128_f32[3] + matrix.r[3].m128_f32[2]));</div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> </div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// Calculate far plane of frustum.</span></div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> planes[1] = XMPlaneNormalize(XMVectorSet(matrix.r[0].m128_f32[3] - matrix.r[0].m128_f32[2],</div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> matrix.r[1].m128_f32[3] - matrix.r[1].m128_f32[2],</div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> matrix.r[2].m128_f32[3] - matrix.r[2].m128_f32[2],</div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> matrix.r[3].m128_f32[3] - matrix.r[3].m128_f32[2]));</div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> </div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> <span class="comment">// Calculate left plane of frustum.</span></div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> planes[2] = XMPlaneNormalize(XMVectorSet(matrix.r[0].m128_f32[3] + matrix.r[0].m128_f32[0],</div>
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||
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> matrix.r[1].m128_f32[3] + matrix.r[1].m128_f32[0],</div>
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||
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> matrix.r[2].m128_f32[3] + matrix.r[2].m128_f32[0],</div>
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||
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> matrix.r[3].m128_f32[3] + matrix.r[3].m128_f32[0]));</div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> </div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> <span class="comment">// Calculate right plane of frustum.</span></div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> planes[3] = XMPlaneNormalize(XMVectorSet(matrix.r[0].m128_f32[3] - matrix.r[0].m128_f32[0],</div>
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||
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> matrix.r[1].m128_f32[3] - matrix.r[1].m128_f32[0],</div>
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||
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> matrix.r[2].m128_f32[3] - matrix.r[2].m128_f32[0],</div>
|
||
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> matrix.r[3].m128_f32[3] - matrix.r[3].m128_f32[0]));</div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> </div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> <span class="comment">// Calculate top plane of frustum.</span></div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> planes[4] = XMPlaneNormalize(XMVectorSet(matrix.r[0].m128_f32[3] - matrix.r[0].m128_f32[1],</div>
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||
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> matrix.r[1].m128_f32[3] - matrix.r[1].m128_f32[1],</div>
|
||
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> matrix.r[2].m128_f32[3] - matrix.r[2].m128_f32[1],</div>
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||
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> matrix.r[3].m128_f32[3] - matrix.r[3].m128_f32[1]));</div>
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||
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> </div>
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||
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="comment">// Calculate bottom plane of frustum.</span></div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> planes[5] = XMPlaneNormalize(XMVectorSet(matrix.r[0].m128_f32[3] + matrix.r[0].m128_f32[1],</div>
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||
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> matrix.r[1].m128_f32[3] + matrix.r[1].m128_f32[1],</div>
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||
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> matrix.r[2].m128_f32[3] + matrix.r[2].m128_f32[1],</div>
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||
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> matrix.r[3].m128_f32[3] + matrix.r[3].m128_f32[1]));</div>
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||
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> </div>
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||
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < 6; i++)</div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> {</div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> m_planes[i] = planes[i];</div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> }</div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span>}</div>
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</div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> </div>
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||
<div class="foldopen" id="foldopen00059" data-start="{" data-end="}">
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||
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"><a class="line" href="classfrustum.html#aa631d4d670499da25b2c3720cc15c855"> 59</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classfrustum.html#aa631d4d670499da25b2c3720cc15c855">frustum::CheckCube</a>(<span class="keywordtype">float</span> xCenter, <span class="keywordtype">float</span> yCenter, <span class="keywordtype">float</span> zCenter, <span class="keywordtype">float</span> radius, <span class="keywordtype">float</span> tolerance)</div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span>{</div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> <span class="comment">// V<>rifiez chaque plan du frustum pour voir si le cube est <20> l'int<EFBFBD>rieur</span></div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < 6; i++)</div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> {</div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> XMVECTOR plane = m_planes[i];</div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> <span class="keywordflow">if</span> (XMVectorGetX(plane) * (xCenter - radius) + XMVectorGetY(plane) * (yCenter - radius) + XMVectorGetZ(plane) * (zCenter - radius) + XMVectorGetW(plane) > -tolerance)</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <span class="keywordflow">if</span> (XMVectorGetX(plane) * (xCenter + radius) + XMVectorGetY(plane) * (yCenter - radius) + XMVectorGetZ(plane) * (zCenter - radius) + XMVectorGetW(plane) > -tolerance)</div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="keywordflow">continue</span>;</div>
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||
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <span class="keywordflow">if</span> (XMVectorGetX(plane) * (xCenter - radius) + XMVectorGetY(plane) * (yCenter + radius) + XMVectorGetZ(plane) * (zCenter - radius) + XMVectorGetW(plane) > -tolerance)</div>
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<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> <span class="keywordflow">if</span> (XMVectorGetX(plane) * (xCenter + radius) + XMVectorGetY(plane) * (yCenter + radius) + XMVectorGetZ(plane) * (zCenter - radius) + XMVectorGetW(plane) > -tolerance)</div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="keywordflow">if</span> (XMVectorGetX(plane) * (xCenter - radius) + XMVectorGetY(plane) * (yCenter - radius) + XMVectorGetZ(plane) * (zCenter + radius) + XMVectorGetW(plane) > -tolerance)</div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> <span class="keywordflow">if</span> (XMVectorGetX(plane) * (xCenter + radius) + XMVectorGetY(plane) * (yCenter - radius) + XMVectorGetZ(plane) * (zCenter + radius) + XMVectorGetW(plane) > -tolerance)</div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <span class="keywordflow">if</span> (XMVectorGetX(plane) * (xCenter - radius) + XMVectorGetY(plane) * (yCenter + radius) + XMVectorGetZ(plane) * (zCenter + radius) + XMVectorGetW(plane) > -tolerance)</div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <span class="keywordflow">if</span> (XMVectorGetX(plane) * (xCenter + radius) + XMVectorGetY(plane) * (yCenter + radius) + XMVectorGetZ(plane) * (zCenter + radius) + XMVectorGetW(plane) > -tolerance)</div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> </div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> <span class="comment">// Si le cube est en dehors de l'un des plans, il n'est pas dans le frustum</span></div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> }</div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> </div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> <span class="comment">// Si le cube est <20> l'int<EFBFBD>rieur de tous les plans, il est dans le frustum</span></div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span>}</div>
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</div>
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<div class="ttc" id="aclassfrustum_html_a17fbc652d86a362739d01c66ab8aa036"><div class="ttname"><a href="classfrustum.html#a17fbc652d86a362739d01c66ab8aa036">frustum::ConstructFrustum</a></div><div class="ttdeci">void ConstructFrustum(float screenDepth, XMMATRIX projectionMatrix, XMMATRIX viewMatrix)</div><div class="ttdef"><b>Definition</b> <a href="#l00003">frustum.cpp:3</a></div></div>
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<div class="ttc" id="aclassfrustum_html_aa631d4d670499da25b2c3720cc15c855"><div class="ttname"><a href="classfrustum.html#aa631d4d670499da25b2c3720cc15c855">frustum::CheckCube</a></div><div class="ttdeci">bool CheckCube(float xCenter, float yCenter, float zCenter, float radius, float tolerance)</div><div class="ttdef"><b>Definition</b> <a href="#l00059">frustum.cpp:59</a></div></div>
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