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/* lmbind.c by Fred Hucht (C) 1996-2002.
* Example program for 3D stuff */
static const char vcid[] = "$Id: lmbind.c,v 3.3 1998-10-28 19:23:01+01 fred Exp fred $";
#include <X11/Ygl.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#ifndef M_PI
# define M_PI 3.1415926536
#endif
#define NSPHERE 10
float lmodel[] = {
TWOSIDE, 0.00,
LMNULL
};
float material1[] = {
EMISSION, 0.10, 0.10, 0.10,
AMBIENT, 0.00, 0.00, 0.00,
DIFFUSE, 0.80, 0.80, 0.80,
SPECULAR, 1.00, 1.00, 1.00,
SHININESS, 10.0,
ALPHA, 1.0,
LMNULL
};
float material2[] = {
EMISSION, 1.00, 1.00, 1.00,
AMBIENT, 0.00, 0.00, 0.00,
DIFFUSE, 0.00, 0.00, 0.00,
SPECULAR, 0.00, 0.00, 0.00,
LMNULL
};
float light1[] = {
POSITION, 0.0, 0.0, 1.0, 0.0, /* z +inf */
/* AMBIENT, 0.0, 0.0, 0.0,
SPOTDIRECTION, 0.0, 0.0,-1.0,*/
LCOLOR, 1.0, 0.0, 0.0,
LMNULL
};
float light2[] = {
POSITION, 0.0, 1.0, 0.0, 0.0, /* y +inf */
LCOLOR, 0.0, 1.0, 0.0,
LMNULL
};
float light3[] = {
POSITION, 1.0, 0.0, 0.0, 0.0, /* x +inf */
LCOLOR, 0.0, 0.0, 1.0,
LMNULL
};
Matrix idmat = {
{1.0,0.0,0.0,0.0}, /* identity matrix */
{0.0,1.0,0.0,0.0},
{0.0,0.0,1.0,0.0},
{0.0,0.0,0.0,1.0}
};
int main(int argc, char *argv[]) {
int i;
Int32 dev;
Int16 val;
int mx = 0, my = 0, mz = 0, smi = 0, bf = 0, ff = 0, zb = 1;
int l1 = 1, l2 = 2, l3 = 3;
int sm[] = {FLAT, GOURAUD};
Int32 Kugel;
double d = 0.0;
int nsphere = NSPHERE;
if (argc > 1) {
nsphere = atoi(argv[1]);
}
minsize(400,400);
putenv("YGL_OGL=1");
/* setenv("YGL_OGL","1",1); *//* use this ones under BSD unixes */
winopen("lmbind");
RGBmode();
doublebuffer();
gconfig();
qdevice(MOUSEX);
qdevice(MOUSEY);
qdevice(KEYBD);
qdevice(UPARROWKEY);
qdevice(DOWNARROWKEY);
Kugel = genobj();
makeobj(Kugel);
bgntmesh();
for (i = nsphere / 6; i < nsphere; i++) {
double theta = (M_PI / nsphere) * i;
double theta2 = (M_PI / nsphere) * (i+1);
int j;
for (j = 0; j <= 2 * nsphere; j++) {
double phi = (M_PI / nsphere) * j;
Float32 v[3], n[3];
n[0] = sin(theta) * cos(phi);
n[1] = sin(theta) * sin(phi);
n[2] = cos(theta);
v[0] = n[0];
v[1] = n[1];
v[2] = n[2];
n3f(n);
v3f(v);
n[0] = sin(theta2) * cos(phi);
n[1] = sin(theta2) * sin(phi);
n[2] = cos(theta2);
v[0] = n[0];
v[1] = n[1];
v[2] = n[2];
n3f(n);
v3f(v);
}
}
endtmesh();
closeobj();
lsetdepth(0, 0x7FFFFF);
zbuffer(zb);
#if 1
mmode(MVIEWING);
perspective(600, 1.0, 1.0, 30.0);
loadmatrix(idmat); /* redundant here */
lookat(3.0, 3.0, 3.0,
0.0, 0.0, 0.0,
0);
#else
ortho(-2.0,2.0,-2.0,2.0,-2.0,2.0);
/* lookat(0,0,0, 3,3,2, 0);*/
#endif
lmdef(DEFLMODEL, 1, sizeof(lmodel)/sizeof(lmodel[0]), lmodel);
lmdef(DEFMATERIAL, 1, sizeof(material1)/sizeof(material1[0]), material1);
lmdef(DEFMATERIAL, 2, sizeof(material2)/sizeof(material2[0]), material2);
/* lmdef(DEFLIGHT, 1, 0, NULL); */
lmdef(DEFLIGHT, 1, sizeof(light1)/sizeof(light1[0]), light1);
lmdef(DEFLIGHT, 2, sizeof(light2)/sizeof(light2[0]), light2);
lmdef(DEFLIGHT, 3, sizeof(light3)/sizeof(light3[0]), light3);
lmbind(LMODEL, 1);
lmbind(MATERIAL, 1);
lmbind(BACKMATERIAL, 2);
lmbind(LIGHT3, l1);
lmbind(LIGHT1, l2);
lmbind(LIGHT2, l3);
while ((dev = qread(&val))) {
d = 0;
switch (dev) {
case MOUSEX: mx = val; break;
case MOUSEY: my = val; break;
case KEYBD:
switch (val) {
case '\033':
case 'q': exit(0);
case '1': l1 = 1 - l1; lmbind(LIGHT3, l1); break;
case '2': l2 = 2 - l2; lmbind(LIGHT1, l2); break;
case '3': l3 = 3 - l3; lmbind(LIGHT2, l3); break;
case 'x': mx += 5; break;
case 'y': my += 5; break;
case 'z': mz += 5; break;
case 'X': mx -= 5; break;
case 'Y': my -= 5; break;
case 'Z': mz -= 5; break;
case 'r': mx = my = mz = 0; break;
case 'g': shademodel(sm[smi]); smi = 1 - smi; break;
case 'b': bf = 1 - bf; backface(bf); break;
case 'f': ff = 1 - ff; frontface(ff); break;
case 'u': zb = 1 - zb; zbuffer(zb); break;
case 'p': gl2ppm("| ppmtogif > lmbind.gif"); break;
}
break;
case UPARROWKEY: if (val) d = 0.5; break;
case DOWNARROWKEY: if (val) d = -0.5; break;
}
/* No qreset(), drops important events */
/* Move eye */
mmode(MPROJECTION);
translate(0.0, 0.0, d);
mmode(MVIEWING);
pushmatrix();
rotate(30 * mx, 'x');
rotate(30 * my, 'y');
rotate(30 * mz, 'z');
RGBcolor(0,0,0);
clear();
zclear();
callobj(Kugel);
#if 1
translate(0.0, 0.0, 2.0);
callobj(Kugel);
translate(0.0, 2.0,-2.0);
callobj(Kugel);
translate(2.0,-2.0, 0.0);
callobj(Kugel);
#endif
popmatrix();
swapbuffers();
}
return 0;
}
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