31 CleanupStack::PopAndDestroy(); // mypoints</codeblock> <section><title>Drawing a polyline</title> <p>You can draw a polyline using <codeph>DrawPolyLine()</codeph> from an array of points. </p> <codeblock id="GUID-96082027-6F7C-52C3-A1E1-B41569851D97" xml:space="preserve">... |
31 CleanupStack::PopAndDestroy(); // mypoints</codeblock> <section><title>Drawing a polyline</title> <p>You can draw a polyline using <codeph>DrawPolyLine()</codeph> from an array of points. </p> <codeblock id="GUID-96082027-6F7C-52C3-A1E1-B41569851D97" xml:space="preserve">... |
32 // draw a polyline |
32 // draw a polyline |
33 gc.DrawPolyLine(mypoints); |
33 gc.DrawPolyLine(mypoints); |
34 ...</codeblock> </section> <section><title>Drawing a polygon</title> <p>The following example code illustrates how to draw a filled polygon from an array of points. The polygon is self-crossing. Self-crossing polygons can be filled according to one of two rules, <codeph>TFillRule::EAlternate</codeph> (the default), or <codeph>TFillRule::EWinding</codeph>. These rules work with the concept of a winding number, as shown in the following figure: </p> <fig id="GUID-DCCC82D0-04BD-5CE5-B21E-1DF921F7E956"><title> |
34 ...</codeblock> </section> <section><title>Drawing a polygon</title> <p>The following example code illustrates how to draw a filled polygon from an array of points. The polygon is self-crossing. Self-crossing polygons can be filled according to one of two rules, <codeph>TFillRule::EAlternate</codeph> (the default), or <codeph>TFillRule::EWinding</codeph>. These rules work with the concept of a winding number, as shown in the following figure: </p> <fig id="GUID-DCCC82D0-04BD-5CE5-B21E-1DF921F7E956"><title> |
35 Winding numbers |
35 Winding numbers |
36 </title> <image href="GUID-93A4CD14-A3CD-57B2-BF32-57EF38F59ECF_d0e207488_href.png" placement="inline"/></fig> <p> <codeph>EWinding</codeph> fills all areas, while <codeph>EAlternate</codeph> only fills areas with odd winding numbers. </p> <p><b>Drawing a polygon using the EWinding fill rule</b> </p> <ol id="GUID-40875382-97F3-5BBA-9CE7-C49A6418ECCD"><li id="GUID-8A0BBCBF-BAB2-59A0-BE7B-F27875318DF5"><p>Use <codeph>SetBrushStyle()</codeph> to set a cross-hatched brush style. </p> </li> <li id="GUID-C7845F63-2332-5FA4-A750-0223ECFED056"><p>Use <codeph>DrawPolygon()</codeph> to draw the polygon with the <codeph>EWinding</codeph> fill rule. </p> </li> </ol> <codeblock id="GUID-893413B0-E8AA-5317-95B1-A8970D63FFC9" xml:space="preserve">... |
36 </title> <image href="GUID-93A4CD14-A3CD-57B2-BF32-57EF38F59ECF_d0e202480_href.png" placement="inline"/></fig> <p> <codeph>EWinding</codeph> fills all areas, while <codeph>EAlternate</codeph> only fills areas with odd winding numbers. </p> <p><b>Drawing a polygon using the EWinding fill rule</b> </p> <ol id="GUID-40875382-97F3-5BBA-9CE7-C49A6418ECCD"><li id="GUID-8A0BBCBF-BAB2-59A0-BE7B-F27875318DF5"><p>Use <codeph>SetBrushStyle()</codeph> to set a cross-hatched brush style. </p> </li> <li id="GUID-C7845F63-2332-5FA4-A750-0223ECFED056"><p>Use <codeph>DrawPolygon()</codeph> to draw the polygon with the <codeph>EWinding</codeph> fill rule. </p> </li> </ol> <codeblock id="GUID-893413B0-E8AA-5317-95B1-A8970D63FFC9" xml:space="preserve">... |
37 // draw self-crossing polygon using the winding fill rule |
37 // draw self-crossing polygon using the winding fill rule |
38 gc.SetBrushStyle(CGraphicsContext::ESquareCrossHatchBrush); |
38 gc.SetBrushStyle(CGraphicsContext::ESquareCrossHatchBrush); |
39 gc.SetBrushColor(black); |
39 gc.SetBrushColor(black); |
40 gc.DrawPolygon(mypoints,CGraphicsContext::EWinding); |
40 gc.DrawPolygon(mypoints,CGraphicsContext::EWinding); |
41 ...</codeblock> <p><b>Drawing a polygon using the EAlternate fill rule</b> </p> <ol id="GUID-A41D3FCD-9C7D-5400-B0EF-3CC287193B9B"><li id="GUID-0949D505-AF72-5CA6-B93B-7A6D34BC1B5E"><p>Use <codeph>SetBrushStyle()</codeph> to set a diamond cross-hatched brush style. </p> </li> <li id="GUID-F5382106-FFEB-55EA-98DF-751E07050568"><p>Use <codeph>DrawPolygon()</codeph> to draw the polygon with the <codeph>EAlternate</codeph> fill rule. </p> </li> </ol> <codeblock id="GUID-CBF5948B-BC44-5803-B00B-86D231D44169" xml:space="preserve">... |
41 ...</codeblock> <p><b>Drawing a polygon using the EAlternate fill rule</b> </p> <ol id="GUID-A41D3FCD-9C7D-5400-B0EF-3CC287193B9B"><li id="GUID-0949D505-AF72-5CA6-B93B-7A6D34BC1B5E"><p>Use <codeph>SetBrushStyle()</codeph> to set a diamond cross-hatched brush style. </p> </li> <li id="GUID-F5382106-FFEB-55EA-98DF-751E07050568"><p>Use <codeph>DrawPolygon()</codeph> to draw the polygon with the <codeph>EAlternate</codeph> fill rule. </p> </li> </ol> <codeblock id="GUID-CBF5948B-BC44-5803-B00B-86D231D44169" xml:space="preserve">... |