ZealOS/docs/Demo/Graphics/Shadow.CC.html
2021-08-09 02:04:03 -04:00

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<a name="l1"></a><span class=cF1>F64</span><span class=cF0> theta, phi, omega, s;
<a name="l2"></a></span><span class=cF9>CDC</span><span class=cF0> *dc0, *dc1;
<a name="l3"></a>
<a name="l4"></a>
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<a name="l10"></a>
<a name="l11"></a> </span><span class=cFA>&lt;1&gt;/* Graphics Not Rendered in HTML */</span><span class=cF0>
<a name="l12"></a>
<a name="l13"></a>
<a name="l14"></a>
<a name="l15"></a>
<a name="l16"></a>
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<a name="l20"></a>
<a name="l21"></a></span><span class=cF1>U0</span><span class=cF0> GrBlackLighting(</span><span class=cF9>CDC</span><span class=cF0> *dc, </span><span class=cF9>CD3I32</span><span class=cF0> *, </span><span class=cF9>CD3I32</span><span class=cF0> *, </span><span class=cF9>CD3I32</span><span class=cF0> *, </span><span class=cF9>CColorROPU32</span><span class=cF0>)
<a name="l22"></a>{
<a name="l23"></a> dc-&gt;color = </span><span class=cFE>0</span><span class=cF0>;
<a name="l24"></a>}
<a name="l25"></a>
<a name="l26"></a></span><span class=cF1>U0</span><span class=cF0> DrawShadow(</span><span class=cF9>CTask</span><span class=cF0> *task)
<a name="l27"></a>{
<a name="l28"></a> </span><span class=cF9>I64</span><span class=cF0> r[</span><span class=cFE>4</span><span class=cF0>][</span><span class=cFE>4</span><span class=cF0>], *r2;
<a name="l29"></a>
<a name="l30"></a> </span><span class=cF5>Mat4x4IdentEqu</span><span class=cF0>(dc1-&gt;r);
<a name="l31"></a> </span><span class=cF5>Mat4x4RotZ</span><span class=cF0>(dc1-&gt;r, theta);
<a name="l32"></a> </span><span class=cF5>Mat4x4RotX</span><span class=cF0>(dc1-&gt;r, phi);
<a name="l33"></a> </span><span class=cF5>Mat4x4RotZ</span><span class=cF0>(dc1-&gt;r, omega);
<a name="l34"></a> </span><span class=cF5>Mat4x4Scale</span><span class=cF0>(dc1-&gt;r, s);
<a name="l35"></a> </span><span class=cF5>Mat4x4TranslationEqu</span><span class=cF0>(dc1-&gt;r, </span><span class=cFE>200</span><span class=cF0>, </span><span class=cFE>200</span><span class=cF0>, </span><span class=cFE>5000</span><span class=cF0>);
<a name="l36"></a> dc1-&gt;flags |= </span><span class=cF3>DCF_TRANSFORMATION</span><span class=cF0>;
<a name="l37"></a> </span><span class=cF5>DCMat4x4Set</span><span class=cF0>(dc1, dc1-&gt;r);
<a name="l38"></a>
<a name="l39"></a> </span><span class=cF5>MemSet</span><span class=cF0>(r, </span><span class=cFE>0</span><span class=cF0>, </span><span class=cF1>sizeof</span><span class=cF7>(</span><span class=cF0>r</span><span class=cF7>)</span><span class=cF0>);
<a name="l40"></a>
<a name="l41"></a> r[</span><span class=cFE>0</span><span class=cF0>][</span><span class=cFE>0</span><span class=cF0>] = </span><span class=cF3>GR_SCALE</span><span class=cF0>;
<a name="l42"></a> r[</span><span class=cFE>1</span><span class=cF0>][</span><span class=cFE>1</span><span class=cF0>] = </span><span class=cF3>GR_SCALE</span><span class=cF0> / </span><span class=cFE>2</span><span class=cF0>; </span><span class=cF2>//Pick a plane for the shadow, to suit your taste.</span><span class=cF0>
<a name="l43"></a> r[</span><span class=cFE>1</span><span class=cF0>][</span><span class=cFE>2</span><span class=cF0>] = </span><span class=cF3>GR_SCALE</span><span class=cF0> / </span><span class=cFE>2</span><span class=cF0>; </span><span class=cF2>//It doesn't have to have a norm of 1.0.</span><span class=cF0>
<a name="l44"></a> r[</span><span class=cFE>2</span><span class=cF0>][</span><span class=cFE>2</span><span class=cF0>] = </span><span class=cF3>GR_SCALE</span><span class=cF0>;
<a name="l45"></a> r[</span><span class=cFE>3</span><span class=cF0>][</span><span class=cFE>3</span><span class=cF0>] = </span><span class=cF3>GR_SCALE</span><span class=cF0>;
<a name="l46"></a>
<a name="l47"></a> </span><span class=cF5>Mat4x4TranslationEqu</span><span class=cF0>(r, </span><span class=cFE>0</span><span class=cF0>, -</span><span class=cFE>2200</span><span class=cF0>, </span><span class=cFE>1000</span><span class=cF0>);
<a name="l48"></a> r2 = </span><span class=cF5>Mat4x4MulMat4x4New</span><span class=cF0>(r, dc1-&gt;r, task);
<a name="l49"></a> </span><span class=cF5>Free</span><span class=cF0>(dc1-&gt;r);
<a name="l50"></a> </span><span class=cF5>DCMat4x4Set</span><span class=cF0>(dc1, r2);
<a name="l51"></a>
<a name="l52"></a> dc1-&gt;lighting = &amp;GrBlackLighting;
<a name="l53"></a> </span><span class=cF5>Sprite3</span><span class=cF0>(dc1, </span><span class=cFE>0</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=cFA>&lt;1&gt;</span><span class=cF0>);
<a name="l54"></a>}
<a name="l55"></a>
<a name="l56"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cF5>DrawIt</span><span class=cF0>(</span><span class=cF9>CTask</span><span class=cF0> *task, </span><span class=cF9>CDC</span><span class=cF0> *)
<a name="l57"></a>{
<a name="l58"></a> </span><span class=cF5>DCDepthBufReset</span><span class=cF0>(dc0);
<a name="l59"></a> </span><span class=cF5>Mat4x4IdentEqu</span><span class=cF0>(dc0-&gt;r);
<a name="l60"></a> </span><span class=cF5>Mat4x4RotZ</span><span class=cF0>(dc0-&gt;r, theta);
<a name="l61"></a> </span><span class=cF5>Mat4x4RotX</span><span class=cF0>(dc0-&gt;r, phi);
<a name="l62"></a> </span><span class=cF5>Mat4x4RotZ</span><span class=cF0>(dc0-&gt;r, omega);
<a name="l63"></a> </span><span class=cF5>Mat4x4Scale</span><span class=cF0>(dc0-&gt;r, s);
<a name="l64"></a> </span><span class=cF5>Mat4x4TranslationEqu</span><span class=cF0>(dc0-&gt;r, </span><span class=cFE>200</span><span class=cF0>, </span><span class=cFE>200</span><span class=cF0>, </span><span class=cFE>5000</span><span class=cF0>);
<a name="l65"></a> dc0-&gt;flags |= </span><span class=cF3>DCF_TRANSFORMATION</span><span class=cF0>;
<a name="l66"></a> </span><span class=cF5>DCMat4x4Set</span><span class=cF0>(dc0, dc0-&gt;r);
<a name="l67"></a> </span><span class=cF1>if</span><span class=cF0> (</span><span class=cFB>mp_count</span><span class=cF0> &gt; </span><span class=cFE>1</span><span class=cF0>)
<a name="l68"></a> </span><span class=cF5>JobQueue</span><span class=cF0>(&amp;DrawShadow, task, </span><span class=cFE>1</span><span class=cF0>);
<a name="l69"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l70"></a> DrawShadow(task);
<a name="l71"></a> </span><span class=cF5>Sprite3</span><span class=cF0>(dc0, </span><span class=cFE>0</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=cFA>&lt;1&gt;</span><span class=cF0>);
<a name="l72"></a>}
<a name="l73"></a>
<a name="l74"></a></span><span class=cF1>U0</span><span class=cF0> Shadow()
<a name="l75"></a>{</span><span class=cF2>//The shadow image b.s.</span><span class=cF0> </span><span class=cF2>Any is plausible.</span><span class=cF0>
<a name="l76"></a> dc0 = </span><span class=cF5>DCAlias</span><span class=cF0>(</span><span class=cFB>gr</span><span class=cF0>.dc2, </span><span class=cF5>Fs</span><span class=cF0>);
<a name="l77"></a> dc1 = </span><span class=cF5>DCAlias</span><span class=cF0>(</span><span class=cFB>gr</span><span class=cF0>.dc2, </span><span class=cF5>Fs</span><span class=cF0>);
<a name="l78"></a> </span><span class=cF5>DCDepthBufAlloc</span><span class=cF0>(dc0);
<a name="l79"></a> dc1-&gt;depth_buf = dc0-&gt;depth_buf;
<a name="l80"></a>
<a name="l81"></a> theta = </span><span class=cFE>0</span><span class=cF0>;
<a name="l82"></a> phi = </span><span class=cFE>0</span><span class=cF0>;
<a name="l83"></a> omega = </span><span class=cFE>0</span><span class=cF0>;
<a name="l84"></a> s = </span><span class=cFE>1</span><span class=cF0>.</span><span class=cFE>5</span><span class=cF0>;
<a name="l85"></a>
<a name="l86"></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="l87"></a> </span><span class=cF5>WinMax</span><span class=cF0>;
<a name="l88"></a> </span><span class=cF5>Fs</span><span class=cF0>-&gt;draw_it = &amp;</span><span class=cF5>DrawIt</span><span class=cF0>;
<a name="l89"></a>
<a name="l90"></a> </span><span class=cF1>while</span><span class=cF0> (!</span><span class=cF5>CharScan</span><span class=cF0>)
<a name="l91"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l92"></a> theta += </span><span class=cFE>2</span><span class=cF0> * </span><span class=cF3>pi</span><span class=cF0> / </span><span class=cFE>70</span><span class=cF0>;
<a name="l93"></a> phi += </span><span class=cFE>2</span><span class=cF0> * </span><span class=cF3>pi</span><span class=cF0> / </span><span class=cFE>90</span><span class=cF0>;
<a name="l94"></a> omega += </span><span class=cFE>2</span><span class=cF0> * </span><span class=cF3>pi</span><span class=cF0> / </span><span class=cFE>110</span><span class=cF0>;
<a name="l95"></a> </span><span class=cF5>Sleep</span><span class=cF0>(</span><span class=cFE>20</span><span class=cF0>);
<a name="l96"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l97"></a> </span><span class=cF5>SettingsPop</span><span class=cF0>;
<a name="l98"></a> </span><span class=cF5>DCDel</span><span class=cF0>(dc0);
<a name="l99"></a> dc1-&gt;depth_buf = </span><span class=cF3>NULL</span><span class=cF0>;
<a name="l100"></a> </span><span class=cF5>DCDel</span><span class=cF0>(dc1);
<a name="l101"></a>}
<a name="l102"></a>
<a name="l103"></a>Shadow;
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