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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"><html> <head> <title>Constrained_triangulation_2</title> </head> <body> <P align="center"><FONT size="5">How to use Constrained_triangulation_2 Demo</FONT></P> <br> Main Functionality <UL> <LI><A href="#new">Reset application</A></LI> <LI><A href="#new_window">Creating a new window</A></LI> <LI><A href="#print">Print</A></LI> <LI><A href="#close_window">Close the current window</A></LI> <LI><A href="#quit">Quit the application</A></LI> </UL><br> Editing <UL> <LI><A href="#gen_tr">Generate Delaunay triangulation</A></LI> <LI><A href="#insert_vertex">Insert a new vertex</A></LI> <LI><A href="#insert_constrained">Insert a new segment constrained</A> </LI> <LI><A href="#insert_poly">Insert a polygon as constrained</A></LI> </UL> Persistance <UL> <LI><A href="#save_triangulation">Save the current triangulation</A></LI> <LI><A href="#load_triangulation">Load an existing triangulation</A></LI> <LI><A href="#load_constraints">Load a constraints file</A></LI> <LI><A href="#save_constraints">Save constraints to file</A></LI> </UL> <P align="left"><STRONG><FONT size="5"></FONT></STRONG> </P> <P align="left"><STRONG><FONT size="5"></FONT></STRONG> </P> <P align="left"><STRONG><FONT size="5"></FONT></STRONG> </P> <P align="left"><STRONG><FONT size="5"></FONT></STRONG> </P> <P align="left"><STRONG><FONT color="#3300cc" size="4"><A name="new"> </A></FONT></STRONG> </P> <P align="left"><STRONG><FONT color="#3300cc" size="4"></FONT> </STRONG> </P> <P align="left"><STRONG> <FONT color="#3300cc" size="3">Reset application</FONT></STRONG></P> Press Ctrl+N combination keys or go to File menu and choose "New". The triangulation will be erased, the window's viewport will be set to default. (-1, 1, -1, 1) <P align="left"><STRONG><FONT color="#3300cc" size="4"> <A name="new_window"></A></FONT></STRONG> </P> <P align="left"><STRONG><FONT color="#3300cc" size="4"></FONT> </STRONG> </P> <P align="left"><STRONG> <FONT color="#3300cc" size="3">Create a new window</FONT></STRONG></P> Press Ctrl+W combination keys or go to File menu and choose "New Window". A new window will appear, modifying the viewport to make the triangulation fit in the new window. <P align="left"><STRONG><FONT color="#3300cc" size="4"> <A name="print"></A></FONT></STRONG> </P> <P align="left"><STRONG><FONT color="#3300cc" size="4"></FONT> </STRONG> </P> <P align="left"><STRONG><FONT color="#3300cc" size="3">Print</FONT> </STRONG></P> Press Ctrl+P combination keys or go to File menu and choose "Print". The visible area on the screen will be outputed to the print device of your choice. <P align="left"><STRONG><FONT color="#3300cc" size="4"> <A name="close_window"></A></FONT></STRONG> </P> <P align="left"><STRONG><FONT color="#3300cc" size="4"></FONT> </STRONG> </P> <P align="left"><STRONG> <FONT color="#3300cc" size="3">Close the current window</FONT> </STRONG></P> Press Ctrl+X combination keys or go to File menu and choose "Close". You may do it for any window other than the initial one, this operation will close only the one you have choosen. If you do this for the initial parent window, it will close the others too. <P align="left"><STRONG><FONT color="#3300cc" size="4"><A name="quit"> </A></FONT></STRONG> </P> <P align="left"><STRONG><FONT color="#3300cc" size="4"></FONT> </STRONG> </P> <P align="left"><STRONG> <FONT color="#3300cc" size="3">Quit the application</FONT></STRONG></P> Press Ctrl+Q combination keys or go to File menu and choose "Quit". When you quit the application, all the windows you have created will be destroyed. <P align="left"><STRONG><FONT color="#3300cc" size="4"><A name="gen_tr"> </A></FONT></STRONG> </P> <P align="left"><STRONG><FONT color="#3300cc" size="4"></FONT> </STRONG> </P> <P align="left"><STRONG> <FONT color="#3300cc" size="3">Generate Delaunay triangulation</FONT> </STRONG></P> To generate a Delaunay triangulation, go to Edit menu and choose "Generate Triangulation" button, or press Ctrl+G combination keys. Each time you generate the triangulation, the old one will be erased. <P align="left"><STRONG><FONT color="#3300cc" size="4"> <A name="insert_vertex"></A></FONT></STRONG> </P> <P align="left"><STRONG><FONT color="#3300cc" size="4"></FONT> </STRONG> </P> <P align="left"><STRONG> <FONT color="#3300cc" size="3">Insert a new vertex</FONT></STRONG></P> <IMG SRC="help/cinput_point_layer.gif"></IMG> Left click on the "Input point" layer. Be sure there is no layer activated in standard toolbar that eat events. To be sure, press the arrow button situated on the standard toolbar. Left Click anywhere on the application's drawing area (the black rectangle) to insert the vertex. The vertex is inserted in the triangulation. To insert more than one vertex, keep clicking on the rectangle without deactivating the "Input point" layer. To deactivate this layer, just press the arrow button situated on the same toolbar. <P align="left"><STRONG><FONT color="#3300cc" size="4"> <A name="insert_constrained"></A></FONT></STRONG> </P> <P align="left"><STRONG><FONT color="#3300cc" size="4"></FONT> </STRONG> </P> <P align="left"><STRONG> <FONT color="#3300cc" size="3">Insert a new segment constrained</FONT> </STRONG></P> <IMG SRC="help/cinput_segment_layer.gif"></IMG> Left click on the "Input Segment" layer. Be sure there is no layer activated in the standard toolbar that eat events. To be sure, press the arrow button situated on the standard toolbar. Left click anywhere on the application's drawing area (the black rectangle) to specify the source of the segment. Move the mouse to specify the target of the segment. Note that the segment is not defined until you click the second time. You may even zoom in or out when the first segment point was defined. This way you are able to choose exactly where your segment could be. To insert more than one segment, repeat this procedure without deactivating the "Input Segment" layer. To deactivate this layer, just press the arrow button situated on the same toolbar. <P align="left"><STRONG><FONT color="#3300cc" size="4"> <A name="insert_poly"></A></FONT></STRONG> </P> <P align="left"><STRONG><FONT color="#3300cc" size="4"></FONT> </STRONG> </P> <P align="left"><STRONG> <FONT color="#3300cc" size="3">Insert a polygon</FONT></STRONG></P> <IMG SRC="help/cinput_polygon_layer.gif"></IMG> Left click on the "Input Polygon" layer. Be sure there is no layer activated in the standard toolbar that eat events. To be sure, press the arrow button situated on the standard toolbar. Left click on the drawing area (the black rectangle) to specify the vertices of the polygon. Note that the polygon could not be simple. A right click on the drawing area will close the polygon without introducing a new vertex. The polygon input layer has the same functionality as the segment input layer: you may zoom in or out while you construct your polygon. To insert more than one polygon, repeat the procedure without deactivating the "Input Polygon" layer. To deactivate this layer, just press the arrow button situated on the same toolbar. <P align="left"><STRONG><FONT color="#3300cc" size="4"> <A name="save_triangulation"></A></FONT></STRONG> </P> <P align="left"><STRONG><FONT color="#3300cc" size="4"></FONT> </STRONG> </P> <P align="left"><STRONG> <FONT color="#3300cc" size="3">Save the current triangulation</FONT> </STRONG></P> Press Ctrl+S combination keys or go to File menu, then choose "Save Triangulation". A save file dialog will appear, the default name given is "triangulation.cgal". You may change the name then press "Save" or hit "Enter" key. To cancel the save process just press Esc key.<br> <FONT SIZE=3 COLOR="#0000FF"> The triangulation saved does not contain the viewport.</FONT> <P align="left"><STRONG><FONT color="#3300cc" size="4"> <A name="load_triangulation"></A></FONT></STRONG> </P> <P align="left"><STRONG><FONT color="#3300cc" size="4"></FONT> </STRONG> </P> <P align="left"><STRONG> <FONT color="#3300cc" size="3">Load an existing triangulation</FONT> </STRONG></P> Press Ctrl+L combination keys or go to File menu and choose "Load Triangulation". A load file dialog will appear, having a filter that displays only the files with "cgal" extension. Choose a file then press "Open" button or hit "Enter" key.<br> <FONT SIZE=3 COLOR="#0000FF"> The application will change the current visible area to fit the bounding box of the triangualtion.</FONT> <P align="left"><STRONG><FONT color="#3300cc" size="4"> <A name="load_constraints"></A></FONT></STRONG> </P> <P align="left"><STRONG><FONT color="#3300cc" size="4"></FONT> </STRONG> </P> <P align="left"><STRONG> <FONT color="#3300cc" size="3">Load a constraints file</FONT> </STRONG></P> Press Ctrl+C combination keys or go to File menu and choose "Load Constraints". A load file dialog will appear, having a filter that displays only the files with "edg" extension. Go to data directory and choose norway.edg, then press "Open" button or hit "Enter" key.<br> <FONT SIZE=3 COLOR="#0000FF"> The application will change the current visible area to fit the bounding box of the triangualtion.</FONT> <P align="left"><STRONG><FONT size="5"></FONT></STRONG> </P> <P align="left"><STRONG><FONT size="5"></FONT></STRONG> </P><br><hr><!-- Created: Mon Jan 13 15:27:00 MET 2003 --><!-- hhmts start -->Last modified: Wed Jul 2 14:15:52 MEST 2003<!-- hhmts end --> </body></html>⌨️ 快捷键说明
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