plshade
hatch polygon
| parameter | type | units | description |
|---|---|---|---|
| *xvert,*yvert | float* | uu | vertices of the polygon |
| nvert | int | -- | number of vertices |
| dir | float | degr | direction of shading lines |
| wmesh | float | mm | distance between shading lines |
| linetype | int | dash | see plot |
| returns: | void |
Description
plshade shades a polygon determined by nvert vertices whose coordinates (in user units) are stored in xvert and yvert. The polygon outline is not drawn: use plpline if you need it. The direction of the shading lines is dir degrees with respect to the current x-axis. The distance between the lines is wmesh millimeters. linetype (see plot) determines the form of the shading lines.Examples
The following script draws a polygon with plpline and hatches it with solid as well as dashed lines in two directions.n=20 plrdx n 0 5 10 15 20 25 20 15 10 5 0 -5 -10 -15 -25 -20 -15 -10 -5 0 plrdy n 0 5 10 15 20 25 30 35 40 45 50 45 40 35 30 25 20 15 10 0 plinit PS plshade A4 50 50 "" "" plshade n 45 2 DOWN plshade n 0 2 DASH plpline n "O" DOWN
