Function:ss2sbc
From S2PLOT
(Difference between revisions)
Revision as of 01:22, 30 October 2007
ss2sbc
Set the background colour.
Prototype
void ss2sbc(float r, float g, float b);
Description
Set the background colour. This call should almost always be followed by calls to s2scr to set the 0th colour index to be the same as the background, and the 1st colour index to be the opposite. Some S2PLOT internals always use white to draw text, and setting the background colour to a light value might result in some text being difficult or impossible to read.
See Also
| struct_COLOUR | Data structure for (r,g,b) colour indices. |
| s2scr | Set colour representation, ie. define a colour associated with an index. |
Code Example
#include <stdio.h>
#include <stdlib.h>
#include "s2plot.h"
int main(int argc, char *argv[])
{
float r, g, b; /* Background colour */
XYZ xyz = { 0.0, 0.0, 0.0 }; /* Position */
COLOUR col; /* Sphere colour */
float radius = 0.3; /* Radius */
s2opend("/?",argc, argv); /* Open the display */
r = 0.3; /* Background colour */
g = 0.7;
b = 0.2;
ss2sbc(r, g, b); /* Set background colour */
s2swin(-1.,1., -1.,1., -1.,1.); /* Set the window coordinates */
s2box("BCDET",0,0,"BCDET",0,0,"BCDET",0,0); /* Draw coordinate box */
col.r = 1.0-r; /* Sphere colour */
col.g = 1.0-g; /* Sphere colour */
col.b = 1.0-b; /* Sphere colour */
ns2vsphere(xyz, radius, col); /* Draw the sphere */
s2show(1); /* Open the s2plot window */
return 1;
}
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