Function:ss2ltt
From S2PLOT
(Difference between revisions)
Revision as of 03:26, 27 January 2009
ss2ltt
Create a texture with LATEX commands.
Prototype
unsigned int ss2ltt(char *latexcmd, float *aspect);
Description
Create a texture with LaTeX commands contained in the string latexcmd. The return value is the texture handle (as used by eg. ns2vf4xt etc). The x:y aspect ratio of the texture map is returned in aspect.
This function assumes that LaTeX is installed on your system in the location indicated by the environment variable S2PLOT_LATEXBIN.
See Also
| ss2lt | Load a texture for future (generally repeated) use. |
Code Example
#include <stdio.h>
#include <stdlib.h>
#include "s2plot.h"
int main(int argc, char *argv[])
{
char *latexcmd = "$f(x) = \\Sigma^{\\infty}_{i=0} a_i \\sin(2\\pi x)$";
XYZ pos[4]; /* Vertices for texture */
COLOUR col = { 1.0, 1.0, 1.0 }; /* Polygon colour */
float aspect; /* Aspect ratio */
unsigned int id; /* Texture id */
s2opend("/?",argc, argv); /* Open the display */
s2swin(-1.,1., -1.,1., -1.,1.); /* Set the window coordinates */
s2box("BCDET",0,0,"BCDET",0,0,"BCDET",0,0); /* Draw coordinate box */
id = ss2ltt(latexcmd, &aspect); /* Create latex texture */
/* Must have S2PLOT_LATEXBIN environment variable correctly set */
aspect = 1.0/aspect;
pos[0].x = -1.0; pos[0].y = +aspect; pos[0].z = 0.0;
pos[1].x = +1.0; pos[1].y = +aspect; pos[1].z = 0.0;
pos[2].x = +1.0; pos[2].y = -aspect; pos[2].z = 0.0;
pos[3].x = -1.0; pos[3].y = -aspect; pos[3].z = 0.0;
ns2vf4x(pos, col, id, 1.0, 'o'); /* Draw the texture */
s2show(1); /* Open the s2plot window */
return 1;
}
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