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ZealOS/docs/Demo/Graphics/PredatorPrey.CC.html
TomAwezome 923b700822 Change DVDImageWrite to use single buffer. 
Add CAtapiWriteCmd for AHCIAtapiBlksWrite.
Remove AHCIAtapiSeek and AHCIAtapiFormat.
2021-08-15 02:23:46 -04:00

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<pre style="font-family:monospace;font-size:12pt">
<a name="l1"></a><span class=cF2>//Classic 2nd order nonlinear ordinary differential equation</span><span class=cF0>
<a name="l2"></a>
<a name="l3"></a></span><span class=cF9>I64</span><span class=cF0> mp_not_done_flags;
<a name="l4"></a>
<a name="l5"></a>#</span><span class=cF1>define</span><span class=cF0> OX </span><span class=cFE>10</span><span class=cF0>
<a name="l6"></a>#</span><span class=cF1>define</span><span class=cF0> OY </span><span class=cF3>GR_HEIGHT</span><span class=cF0> / </span><span class=cFE>2</span><span class=cF0> - </span><span class=cF3>FONT_HEIGHT</span><span class=cF0>
<a name="l7"></a>
<a name="l8"></a>#</span><span class=cF1>define</span><span class=cF0> MICRO_STEP </span><span class=cFE>0</span><span class=cF0>.</span><span class=cFE>000001</span><span class=cF0>
<a name="l9"></a>
<a name="l10"></a></span><span class=cF1>class</span><span class=cF0> State
<a name="l11"></a>{
<a name="l12"></a> </span><span class=cF1>F64</span><span class=cF0> wabbits, hawks, d_wabbits, d_hawks; </span><span class=cF2>//Technically, these are not part of the state.</span><span class=cF0>
<a name="l13"></a>};
<a name="l14"></a>
<a name="l15"></a></span><span class=cF1>U0</span><span class=cF0> Steps(State *s)
<a name="l16"></a>{
<a name="l17"></a> </span><span class=cF9>I64</span><span class=cF0> i;
<a name="l18"></a>
<a name="l19"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; </span><span class=cFE>10000</span><span class=cF0>; i++)
<a name="l20"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l21"></a> s-&gt;d_wabbits = s-&gt;wabbits * (</span><span class=cFE>1</span><span class=cF0>.</span><span class=cFE>0</span><span class=cF0> - </span><span class=cFE>0</span><span class=cF0>.</span><span class=cFE>10</span><span class=cF0> * s-&gt;hawks);
<a name="l22"></a> s-&gt;d_hawks = -s-&gt;hawks * (</span><span class=cFE>1</span><span class=cF0>.</span><span class=cFE>0</span><span class=cF0> - </span><span class=cFE>0</span><span class=cF0>.</span><span class=cFE>01</span><span class=cF0> * s-&gt;wabbits);
<a name="l23"></a> s-&gt;hawks += s-&gt;d_hawks * MICRO_STEP;
<a name="l24"></a> s-&gt;wabbits += s-&gt;d_wabbits * MICRO_STEP;
<a name="l25"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l26"></a>}
<a name="l27"></a>
<a name="l28"></a></span><span class=cF1>U0</span><span class=cF0> PlotTrajectory(</span><span class=cF9>CTask</span><span class=cF0> *parent)
<a name="l29"></a>{
<a name="l30"></a> </span><span class=cF9>I64</span><span class=cF0> i;
<a name="l31"></a> </span><span class=cF9>CDC</span><span class=cF0> *dc = </span><span class=cF5>DCAlias</span><span class=cF0>(, parent);
<a name="l32"></a> State s;
<a name="l33"></a>
<a name="l34"></a> </span><span class=cF5>MemSet</span><span class=cF0>(&amp;s, </span><span class=cFE>0</span><span class=cF0>, </span><span class=cF1>sizeof</span><span class=cF7>(</span><span class=cF0>State</span><span class=cF7>)</span><span class=cF0>);
<a name="l35"></a> s.wabbits = </span><span class=cF5>RandU16</span><span class=cF0> % </span><span class=cFE>100</span><span class=cF0> + </span><span class=cFE>10</span><span class=cF0>;
<a name="l36"></a> s.hawks = </span><span class=cF5>RandU16</span><span class=cF0> % </span><span class=cFE>10</span><span class=cF0> + </span><span class=cFE>1</span><span class=cF0>;
<a name="l37"></a>
<a name="l38"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; </span><span class=cFE>1000</span><span class=cF0>; i++)
<a name="l39"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l40"></a> dc-&gt;color = </span><span class=cF3>LTGREEN</span><span class=cF0>;
<a name="l41"></a> </span><span class=cF5>GrPlot</span><span class=cF0>(dc, s.wabbits + OX, OY - s.d_wabbits);
<a name="l42"></a> dc-&gt;color=</span><span class=cF3>LTRED</span><span class=cF0>;
<a name="l43"></a> </span><span class=cF5>GrPlot</span><span class=cF0>(dc, s.hawks + OX, OY - s.d_hawks);
<a name="l44"></a> Steps(&amp;s);
<a name="l45"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l46"></a> </span><span class=cF5>DCDel</span><span class=cF0>(dc);
<a name="l47"></a> </span><span class=cF5>LBtr</span><span class=cF0>(&amp;mp_not_done_flags, </span><span class=cF5>Gs</span><span class=cF0>-&gt;num);
<a name="l48"></a>}
<a name="l49"></a>
<a name="l50"></a></span><span class=cF1>U0</span><span class=cF0> PredatorPrey()
<a name="l51"></a>{
<a name="l52"></a> </span><span class=cF9>I64</span><span class=cF0> i;
<a name="l53"></a> </span><span class=cF9>CDC</span><span class=cF0> *dc = </span><span class=cF5>DCAlias</span><span class=cF0>;
<a name="l54"></a>
<a name="l55"></a> </span><span class=cF5>PopUpOk</span><span class=cF0>(</span><span class=cF6>&quot;This will plot multiple predator-prey\n&quot;</span><span class=cF0>
<a name="l56"></a> </span><span class=cF6>&quot;trajectories. It restarts many times\n&quot;</span><span class=cF0>
<a name="l57"></a> </span><span class=cF6>&quot;with different, random, initial populations.\n&quot;</span><span class=cF0>);
<a name="l58"></a> </span><span class=cF5>SettingsPush</span><span class=cF0>; </span><span class=cF2>//See </span><a href="https://zeal-operating-system.github.io/ZealOS/System/TaskSettings.CC.html#l3"><span class=cF4>SettingsPush</span></a><span class=cF0>
<a name="l59"></a> </span><span class=cF1>try</span><span class=cF0>
<a name="l60"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l61"></a> </span><span class=cF5>AutoComplete</span><span class=cF0>;
<a name="l62"></a> </span><span class=cF5>WinBorder</span><span class=cF0>;
<a name="l63"></a> </span><span class=cF5>WinMax</span><span class=cF0>;
<a name="l64"></a> </span><span class=cF5>DocClear</span><span class=cF0>;
<a name="l65"></a> </span><span class=cF5>Refresh</span><span class=cF0>;
<a name="l66"></a>
<a name="l67"></a> dc-&gt;color = </span><span class=cF3>BLACK</span><span class=cF0>;
<a name="l68"></a> </span><span class=cF5>GrLine</span><span class=cF0>(dc, OX, </span><span class=cFE>0</span><span class=cF0>, OX, </span><span class=cF3>GR_HEIGHT</span><span class=cF0> - </span><span class=cF3>FONT_HEIGHT</span><span class=cF0> - </span><span class=cFE>1</span><span class=cF0>);
<a name="l69"></a> </span><span class=cF5>GrLine</span><span class=cF0>(dc, </span><span class=cFE>0</span><span class=cF0>, OY, </span><span class=cF3>GR_WIDTH</span><span class=cF0> - </span><span class=cFE>1</span><span class=cF0>, OY);
<a name="l70"></a> </span><span class=cF1>while</span><span class=cF0> (!</span><span class=cF5>CharScan</span><span class=cF0>)
<a name="l71"></a> {
<a name="l72"></a> mp_not_done_flags = </span><span class=cFE>1</span><span class=cF0> &lt;&lt; </span><span class=cFB>mp_count</span><span class=cF0> - </span><span class=cFE>1</span><span class=cF0>;
<a name="l73"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; </span><span class=cFB>mp_count</span><span class=cF0>; i++)
<a name="l74"></a> </span><span class=cF5>JobQueue</span><span class=cF0>(&amp;PlotTrajectory, </span><span class=cF5>Fs</span><span class=cF0>, i);
<a name="l75"></a>
<a name="l76"></a> </span><span class=cF1>do</span><span class=cF0> </span><span class=cF5>Yield</span><span class=cF0>;
<a name="l77"></a> </span><span class=cF1>while</span><span class=cF0> (mp_not_done_flags);
<a name="l78"></a> }
<a name="l79"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l80"></a> </span><span class=cF1>catch</span><span class=cF0>
<a name="l81"></a> </span><span class=cF5>PutExcept</span><span class=cF0>;
<a name="l82"></a> </span><span class=cF5>SettingsPop</span><span class=cF0>;
<a name="l83"></a> </span><span class=cF5>DCFill</span><span class=cF0>(dc);
<a name="l84"></a> </span><span class=cF5>DCDel</span><span class=cF0>(dc);
<a name="l85"></a>}
<a name="l86"></a>
<a name="l87"></a>PredatorPrey;
</span></pre></body>
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