Draw one or more lines.
This function is like grdraw, except that it draws more than one vector at a time in the current viewport. These are temporary vectors that disappear with any command that refreshes the viewport.
The argument vector-lists represents lists for drawing vectors, complete with from and to points and color. The points must be passed as pairs, in two successive point lists:
The color portion of the vector list must be within the range of 0-255. If the value is greater than 255, the color becomes XOR ink, which complements anything it draws over. If the color is less than 0, the vector becomes highlighted:
| Color | Meaning |
|---|---|
| -1 | Highlight ink. |
| 0 - 255 | Standard Bricscad colors. |
| 256 | XOR ink. |
Examples
| Code | Returns | Draws |
|---|---|---|
| (grvecs '( 2 (1.0 1.0) (3.0 6.0))) | nil | 2 = Yellow vector. |
| (grvecs '( 1 (3.0 6.0) (6.5 10.5) | nil | 1 = Red vector. |
| 4 (0.0 0.0) (3.0 5.0))) | 4 = Cyan vector. |
Tell me about...
(grdraw point1 point2 color [highlight])
Programming Overview of LISP (LISt Processing) Language
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