ZealOS/docs/Demo/Graphics/Extents.CC.html
2021-07-25 04:07:40 -04:00

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<pre style="font-family:monospace;font-size:12pt">
<a name="l1"></a><span class=cF2>//Test image which we will determine the extents of.</span><span class=cF0>
<a name="l2"></a>
<a name="l3"></a></span><span class=cFA>
<a name="l4"></a>&lt;1&gt;/* Graphics Not Rendered in HTML */</span><span class=cF0>
<a name="l5"></a>
<a name="l6"></a>
<a name="l7"></a></span><span class=cF1>U0</span><span class=cF0> Extents()
<a name="l8"></a>{
<a name="l9"></a> </span><span class=cF9>CDC</span><span class=cF0> *dc = </span><span class=cF5>DCAlias</span><span class=cF0>;
<a name="l10"></a> </span><span class=cF9>I64</span><span class=cF0> min_x, max_x, min_y, max_y;
<a name="l11"></a>
<a name="l12"></a> </span><span class=cF2>//Screen, not win coordinates.</span><span class=cF0>
<a name="l13"></a> </span><span class=cF9>I64</span><span class=cF0> h = </span><span class=cF5>Fs</span><span class=cF0>-&gt;pix_left + </span><span class=cF5>Fs</span><span class=cF0>-&gt;scroll_x, v = </span><span class=cF5>Fs</span><span class=cF0>-&gt;pix_top + </span><span class=cF5>Fs</span><span class=cF0>-&gt;scroll_y;
<a name="l14"></a>
<a name="l15"></a> </span><span class=cF5>DocClear</span><span class=cF0>;
<a name="l16"></a> </span><span class=cF5>DCFill</span><span class=cF0>;
<a name="l17"></a>
<a name="l18"></a> </span><span class=cF2>//This sets a flag to record the</span><span class=cF0>
<a name="l19"></a> </span><span class=cF2>//extents of what we draw and inits</span><span class=cF0>
<a name="l20"></a> </span><span class=cF2>//the max's and min's. Vals are</span><span class=cF0>
<a name="l21"></a> </span><span class=cF2>//screen coordinates.</span><span class=cF0>
<a name="l22"></a> </span><span class=cF5>DCExtentsInit</span><span class=cF0>(dc);
<a name="l23"></a>
<a name="l24"></a> dc-&gt;thick = </span><span class=cFE>3</span><span class=cF0>;
<a name="l25"></a> </span><span class=cF5>Sprite3</span><span class=cF0>(dc, </span><span class=cFE>40</span><span class=cF0>, </span><span class=cF3>GR_HEIGHT</span><span class=cF0> &gt;&gt; </span><span class=cFE>1</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="l26"></a>
<a name="l27"></a> dc-&gt;color = </span><span class=cF3>LTRED</span><span class=cF0>;
<a name="l28"></a> dc-&gt;thick = </span><span class=cFE>1</span><span class=cF0>;
<a name="l29"></a>
<a name="l30"></a> </span><span class=cF2>//This box is the extents.</span><span class=cF0>
<a name="l31"></a> </span><span class=cF5>GrLine</span><span class=cF0>(dc, dc-&gt;min_x - h, dc-&gt;min_y - v, dc-&gt;max_x - h, dc-&gt;min_y - v);
<a name="l32"></a> </span><span class=cF5>GrLine</span><span class=cF0>(dc, dc-&gt;min_x - h, dc-&gt;min_y - v, dc-&gt;min_x - h, dc-&gt;max_y - v);
<a name="l33"></a> </span><span class=cF5>GrLine</span><span class=cF0>(dc, dc-&gt;max_x - h, dc-&gt;max_y - v, dc-&gt;max_x - h, dc-&gt;min_y - v);
<a name="l34"></a> </span><span class=cF5>GrLine</span><span class=cF0>(dc, dc-&gt;max_x - h, dc-&gt;max_y - v, dc-&gt;min_x - h, dc-&gt;max_y - v);
<a name="l35"></a>
<a name="l36"></a> </span><span class=cF5>DCDel</span><span class=cF0>(dc);
<a name="l37"></a> </span><span class=cF5>PressAKey</span><span class=cF0>;
<a name="l38"></a> </span><span class=cF5>DCFill</span><span class=cF0>;
<a name="l39"></a>
<a name="l40"></a> </span><span class=cF5>SpriteExtents</span><span class=cF0>(</span><span class=cFA>&lt;1&gt;</span><span class=cF0>, &amp;min_x, &amp;max_x, &amp;min_y, &amp;max_y);
<a name="l41"></a> </span><span class=cF6>&quot;X: %d to %d\n&quot;</span><span class=cF0>, min_x, max_x;
<a name="l42"></a> </span><span class=cF6>&quot;Y: %d to %d\n&quot;</span><span class=cF0>, min_y, max_y;
<a name="l43"></a>}
<a name="l44"></a>
<a name="l45"></a>Extents;
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