Function:ss2ctt
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(Difference between revisions)
| Revision as of 00:21, 4 December 2007 S2plot admin (Talk | contribs) ← Previous diff |
Current revision S2plot admin (Talk | contribs) |
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| Line 22: | Line 22: | ||
| #include <stdio.h> | #include <stdio.h> | ||
| #include <stdlib.h> | #include <stdlib.h> | ||
| + | #include <time.h> | ||
| #include "s2plot.h" | #include "s2plot.h" | ||
| Line 35: | Line 36: | ||
| COLOUR col = { 1.0, 1.0, 1.0 }; /* Colour of sphere */ | COLOUR col = { 1.0, 1.0, 1.0 }; /* Colour of sphere */ | ||
| + | srand48((long)time(NULL)); /* Seed random numbers */ | ||
| s2opend("/?",argc, argv); /* Open the display */ | s2opend("/?",argc, argv); /* Open the display */ | ||
| s2swin(-1.,1., -1.,1., -1.,1.); /* Set the window coordinates */ | s2swin(-1.,1., -1.,1., -1.,1.); /* Set the window coordinates */ | ||
| Line 44: | Line 46: | ||
| tex = ss2gt(texid, &width, &height); /* Store texture */ | tex = ss2gt(texid, &width, &height); /* Store texture */ | ||
| - | for (j=0;j<height;j++) { | + | for (j=0;j<height;j++) { |
| for (i=0;i<width;i++) { | for (i=0;i<width;i++) { | ||
| idx = (j*width + i)*4; /* Stored as (r, g, b, alpha) */ | idx = (j*width + i)*4; /* Stored as (r, g, b, alpha) */ | ||
| Line 53: | Line 55: | ||
| } | } | ||
| } | } | ||
| - | + | ||
| ss2ptt(texid); /* Restore transient texture */ | ss2ptt(texid); /* Restore transient texture */ | ||
| ns2vspherex(xyz, r, col, texid); /* Draw textured sphere */ | ns2vspherex(xyz, r, col, texid); /* Draw textured sphere */ | ||
| s2show(1); /* Open the s2plot window */ | s2show(1); /* Open the s2plot window */ | ||
| - | + | ||
| return 1; | return 1; | ||
| } | } | ||
| + | |||
| </pre></code> | </pre></code> | ||
| [[S2PLOT:Function List | Back]] to S2PLOT function list. | [[S2PLOT:Function List | Back]] to S2PLOT function list. | ||
| __NOTOC__ | __NOTOC__ | ||
| __NOEDITSECTION__ | __NOEDITSECTION__ | ||
Current revision
ss2ctt
Create a transient texture map.
Prototype
unsigned int ss2ctt(int width, int height);
Description
Create a texture as per ss2ct, but texture is for "transient" use: this means the texture is much faster to create, but multi-resolution versions are not constructed/used.
See Also
| ss2ct | Create texture with specified height and width. |
| ss2pt | Reinstall a texture. |
| ss2ptt | Reinstall a transient texture. |
Code Example
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "s2plot.h"
int main(int argc, char *argv[])
{
int texid; /* ID for this texture */
char *tex; /* Array holding texture */
int width, height; /* Dimensions of texture */
int i, j; /* Loop variables */
int idx; /* Temporary index into array */
XYZ xyz = { 0.0, 0.0, 0.0 }; /* Location of sphere */
float r = 0.3; /* Radius of sphere */
COLOUR col = { 1.0, 1.0, 1.0 }; /* Colour of sphere */
srand48((long)time(NULL)); /* Seed random numbers */
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 */
width = 128; /* Width of new texture */
height = 16; /* Height of new texture */
texid = ss2ctt(width, height); /* Create transient texture */
tex = ss2gt(texid, &width, &height); /* Store texture */
for (j=0;j<height;j++) {
for (i=0;i<width;i++) {
idx = (j*width + i)*4; /* Stored as (r, g, b, alpha) */
tex[idx ] = 127*drand48()+128;/* Randomish Red */
tex[idx+1] = 0; /* Green */
tex[idx+2] = 0; /* Blue */
/* Do nothing to alpha */
}
}
ss2ptt(texid); /* Restore transient texture */
ns2vspherex(xyz, r, col, texid); /* Draw textured sphere */
s2show(1); /* Open the s2plot window */
return 1;
}
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