home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
HPAVC
/
HPAVC CD-ROM.iso
/
3DVIS10.ZIP
/
SOURCE1.C
< prev
next >
Wrap
Text File
|
1996-02-29
|
2KB
|
68 lines
/*** SOURCE1.C - Creates a .3DV file with the definition of a surface
by Lenimar N. Andrade, ccendm03@brufpb.bitnet
Dep. of Mathematics - Universidade Federal da Paraíba - Brazil ***/
#include <stdio.h>
#include <math.h>
#include <conio.h>
unsigned nu = 25, nv = 25;
FILE *arq;
/* Parametric equations that define the surface */
float f1(float u, float v) { return sin(v)*cosh(u); }
float f2(float u, float v) { return cos(v)*cosh(u); }
float f3(float u, float v) { return sinh(u); }
/* ------------------------------------------------------------------------- */
void CalcPoints(float umin, float umax, float vmin, float vmax) {
float u, v, incrU, incrV;
unsigned i, j;
incrU = (umax - umin)/nu;
incrV = (vmax - vmin)/nv;
fprintf(arq, "%u\n", (nu + 1)*(nv + 1));
for (v = vmin; v < vmax + incrV/2; v += incrV)
for (u = umin; u < umax + incrU/2; u+= incrU)
fprintf(arq, "%6.3f %6.3f %6.3f\n", f1(u, v), f2(u, v), f3(u, v));
fprintf(arq, "%u\n", 2*(nu + 1)*(nv + 1));
for (i = 1; i <= (nu + 1)*(nv + 1); i++)
if (i % (nu + 1) == 1)
fprintf(arq, "%u %u\n", i, 0);
else
fprintf(arq, "%u %u\n", i, DARKGRAY);
for (i = 1; i <= nu + 1; i++)
for (j = 0; j <= nv; j++)
if (j == 0)
fprintf(arq, "%u %u\n", i + j*(1 + nu), 0);
else
fprintf(arq, "%u %u\n", i + j*(1 + nu), RED);
}
/* ------------------------------------------------------------------------- */
void PrintMsg(void) {
fprintf(arq, "\n%s", "Hyperboloid of one sheet, F(u, v) = (sin(v)*cosh(u), "
"cos(v)*cosh(u), sinh(u))");
fprintf(arq, "\n%s", "Lenimar Nunes de Andrade, ccendm03@brufpb.bitnet\n");
}
/* ------------------------------------------------------------------------- */
void main(void) {
if ((arq = fopen("demo1.3dv", "wt")) == NULL) return;
CalcPoints(-2, 2, -3.1416, 3.1416);
PrintMsg();
fclose(arq);
}
/* ------------------------------------------------------------------------- */
/*** END OF "SOURCE1.C" ***/