tdez2d uses Tdpack entries to draw a surface on a specified workstation.
procedure tdez2d( wid[1] : graphic, x[*] : float, y[*] : float, z[*][*] : float, rmult[1] : float, theta[1] : float, phi[1] : float, ist[1] : integer )
Thus, the coordinate (rmult*DL,theta,phi) is the spherical coordinate for the eye position. If rmult = theta = phi = 0., a default eye position ( 2.5,-55.,70.) is chosen.
The point looked at is calculated to be the midpoint of the surface.
ist | Description |
---|---|
1 | produce a wire-frame surface |
2 | use gray shades underneath; gray shades on top |
3 | use gray shades underneath; red shades on top |
4 | use gray shades underneath; green shades on top |
5 | use gray shades underneath; blue shades on top |
6 | use gray shades underneath; cyan shades on top |
7 | use gray shades underneath; gray shades on top |
8 | use gray shades underneath; magenta shades on top |
If ist is positive, then black is used for the background color and white for the foreground color; if ist is the negative of any of the above values, then white is used for the background color and black for the foreground color. If ist falls outside of the legal range, it is defaulted to 6.
When tdez2d is called, a color table is defined for the workstation specified by wid in the first argument. This color table will supersede any color table that has been previously defined. The color table that is defined is:
Color index | Colors |
---|---|
0 | black if IST is positive; white if IST is negative |
1 | white if IST is positive; black if IST is negative |
2 | red |
3 | green |
4 | blue |
5 | cyan |
6 | magenta |
7 | yellow |
8-37 | grayscale from white to black |
38-67 | shades of gray |
68-97 | shades of red |
98-127 | shades of green |
128-157 | shades of blue |
158-187 | shades of cyan |
188-217 | shades of magenta |
218-247 | shades of yellow |
tdez2d does not call frame.
; ; Create an X11 workstation. ; wid = create "tdez2d_example" xWorkstationClass defaultapp "wkPause" : True end create ; ; Draw surface plot. ; tdez2d(wid, xo, yo, zo, 0., 0., 0., -6) frame(wid)will draw a surface plot of the zo array in shades of cyan with a white background using a default eye position.
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