777 lines
16 KiB
C
777 lines
16 KiB
C
/*
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* This program is under the GNU GPL.
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* Use at your own risk.
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*
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* written by David Bucciarelli (tech.hmw@plus.it)
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* Humanware s.r.l.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <time.h>
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#include <string.h>
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#ifdef WIN32
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#include <windows.h>
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#include <mmsystem.h>
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#endif
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#include <GL/glut.h>
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#include "readtex.h"
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#ifdef XMESA
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#include "GL/xmesa.h"
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static int fullscreen = 1;
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#endif
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#ifndef M_PI
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#define M_PI 3.1415926535
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#endif
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#define vinit(a,i,j,k) {\
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(a)[0]=i;\
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(a)[1]=j;\
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(a)[2]=k;\
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}
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#define vinit4(a,i,j,k,w) {\
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(a)[0]=i;\
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(a)[1]=j;\
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(a)[2]=k;\
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(a)[3]=w;\
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}
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#define vadds(a,dt,b) {\
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(a)[0]+=(dt)*(b)[0];\
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(a)[1]+=(dt)*(b)[1];\
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(a)[2]+=(dt)*(b)[2];\
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}
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#define vequ(a,b) {\
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(a)[0]=(b)[0];\
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(a)[1]=(b)[1];\
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(a)[2]=(b)[2];\
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}
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#define vinter(a,dt,b,c) {\
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(a)[0]=(dt)*(b)[0]+(1.0-dt)*(c)[0];\
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(a)[1]=(dt)*(b)[1]+(1.0-dt)*(c)[1];\
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(a)[2]=(dt)*(b)[2]+(1.0-dt)*(c)[2];\
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}
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#define clamp(a) ((a) < 0.0 ? 0.0 : ((a) < 1.0 ? (a) : 1.0))
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#define vclamp(v) {\
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(v)[0]=clamp((v)[0]);\
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(v)[1]=clamp((v)[1]);\
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(v)[2]=clamp((v)[2]);\
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}
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static int WIDTH = 640;
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static int HEIGHT = 480;
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static GLint T0 = 0;
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static GLint Frames = 0;
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static GLint NiceFog = 1;
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#define DIMP 20.0
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#define DIMTP 16.0
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#define RIDCOL 0.4
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#define NUMTREE 50
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#define TREEINR 2.5
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#define TREEOUTR 8.0
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#define AGRAV -9.8
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typedef struct
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{
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int age;
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float p[3][3];
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float v[3];
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float c[3][4];
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}
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part;
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static float treepos[NUMTREE][3];
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static float black[3] = { 0.0, 0.0, 0.0 };
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static float blu[3] = { 1.0, 0.2, 0.0 };
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static float blu2[3] = { 1.0, 1.0, 0.0 };
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static float fogcolor[4] = { 1.0, 1.0, 1.0, 1.0 };
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static float q[4][3] = {
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{-DIMP, 0.0, -DIMP},
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{DIMP, 0.0, -DIMP},
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{DIMP, 0.0, DIMP},
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{-DIMP, 0.0, DIMP}
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};
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static float qt[4][2] = {
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{-DIMTP, -DIMTP},
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{DIMTP, -DIMTP},
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{DIMTP, DIMTP},
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{-DIMTP, DIMTP}
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};
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static int win = 0;
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static int np;
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static float eject_r, dt, maxage, eject_vy, eject_vl;
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static short shadows;
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static float ridtri;
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static int fog = 1;
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static int help = 1;
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static int joyavailable = 0;
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static int joyactive = 0;
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static part *p;
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static GLuint groundid;
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static GLuint treeid;
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static float obs[3] = { 2.0, 1.0, 0.0 };
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static float dir[3];
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static float v = 0.0;
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static float alpha = -84.0;
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static float beta = 90.0;
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static float
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vrnd(void)
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{
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return (((float) rand()) / RAND_MAX);
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}
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static void
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setnewpart(part * p)
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{
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float a, v[3], *c;
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p->age = 0;
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a = vrnd() * 3.14159265359 * 2.0;
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vinit(v, sin(a) * eject_r * vrnd(), 0.15, cos(a) * eject_r * vrnd());
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vinit(p->p[0], v[0] + vrnd() * ridtri, v[1] + vrnd() * ridtri,
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v[2] + vrnd() * ridtri);
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vinit(p->p[1], v[0] + vrnd() * ridtri, v[1] + vrnd() * ridtri,
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v[2] + vrnd() * ridtri);
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vinit(p->p[2], v[0] + vrnd() * ridtri, v[1] + vrnd() * ridtri,
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v[2] + vrnd() * ridtri);
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vinit(p->v, v[0] * eject_vl / (eject_r / 2),
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vrnd() * eject_vy + eject_vy / 2, v[2] * eject_vl / (eject_r / 2));
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c = blu;
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vinit4(p->c[0], c[0] * ((1.0 - RIDCOL) + vrnd() * RIDCOL),
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c[1] * ((1.0 - RIDCOL) + vrnd() * RIDCOL),
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c[2] * ((1.0 - RIDCOL) + vrnd() * RIDCOL), 1.0);
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vinit4(p->c[1], c[0] * ((1.0 - RIDCOL) + vrnd() * RIDCOL),
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c[1] * ((1.0 - RIDCOL) + vrnd() * RIDCOL),
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c[2] * ((1.0 - RIDCOL) + vrnd() * RIDCOL), 1.0);
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vinit4(p->c[2], c[0] * ((1.0 - RIDCOL) + vrnd() * RIDCOL),
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c[1] * ((1.0 - RIDCOL) + vrnd() * RIDCOL),
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c[2] * ((1.0 - RIDCOL) + vrnd() * RIDCOL), 1.0);
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}
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static void
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setpart(part * p)
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{
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float fact;
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if (p->p[0][1] < 0.1) {
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setnewpart(p);
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return;
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}
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p->v[1] += AGRAV * dt;
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vadds(p->p[0], dt, p->v);
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vadds(p->p[1], dt, p->v);
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vadds(p->p[2], dt, p->v);
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p->age++;
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if ((p->age) > maxage) {
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vequ(p->c[0], blu2);
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vequ(p->c[1], blu2);
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vequ(p->c[2], blu2);
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}
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else {
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fact = 1.0 / maxage;
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vadds(p->c[0], fact, blu2);
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vclamp(p->c[0]);
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p->c[0][3] = fact * (maxage - p->age);
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vadds(p->c[1], fact, blu2);
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vclamp(p->c[1]);
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p->c[1][3] = fact * (maxage - p->age);
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vadds(p->c[2], fact, blu2);
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vclamp(p->c[2]);
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p->c[2][3] = fact * (maxage - p->age);
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}
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}
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static void
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drawtree(float x, float y, float z)
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{
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glBegin(GL_QUADS);
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glTexCoord2f(0.0, 0.0);
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glVertex3f(x - 1.5, y + 0.0, z);
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glTexCoord2f(1.0, 0.0);
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glVertex3f(x + 1.5, y + 0.0, z);
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glTexCoord2f(1.0, 1.0);
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glVertex3f(x + 1.5, y + 3.0, z);
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glTexCoord2f(0.0, 1.0);
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glVertex3f(x - 1.5, y + 3.0, z);
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glTexCoord2f(0.0, 0.0);
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glVertex3f(x, y + 0.0, z - 1.5);
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glTexCoord2f(1.0, 0.0);
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glVertex3f(x, y + 0.0, z + 1.5);
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glTexCoord2f(1.0, 1.0);
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glVertex3f(x, y + 3.0, z + 1.5);
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glTexCoord2f(0.0, 1.0);
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glVertex3f(x, y + 3.0, z - 1.5);
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glEnd();
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}
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static void
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calcposobs(void)
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{
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dir[0] = sin(alpha * M_PI / 180.0);
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dir[2] = cos(alpha * M_PI / 180.0) * sin(beta * M_PI / 180.0);
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dir[1] = cos(beta * M_PI / 180.0);
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if (dir[0] < 1.0e-5 && dir[0] > -1.0e-5)
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dir[0] = 0;
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if (dir[1] < 1.0e-5 && dir[1] > -1.0e-5)
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dir[1] = 0;
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if (dir[2] < 1.0e-5 && dir[2] > -1.0e-5)
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dir[2] = 0;
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obs[0] += v * dir[0];
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obs[1] += v * dir[1];
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obs[2] += v * dir[2];
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}
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static void
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printstring(void *font, char *string)
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{
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int len, i;
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len = (int) strlen(string);
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for (i = 0; i < len; i++)
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glutBitmapCharacter(font, string[i]);
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}
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static void
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reshape(int width, int height)
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{
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WIDTH = width;
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HEIGHT = height;
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glViewport(0, 0, (GLint) width, (GLint) height);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluPerspective(70.0, width / (float) height, 0.1, 30.0);
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glMatrixMode(GL_MODELVIEW);
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}
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static void
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printhelp(void)
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{
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glColor4f(0.0, 0.0, 0.0, 0.5);
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glRecti(40, 40, 600, 440);
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glColor3f(1.0, 0.0, 0.0);
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glRasterPos2i(300, 420);
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printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Help");
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glRasterPos2i(60, 390);
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printstring(GLUT_BITMAP_TIMES_ROMAN_24, "h - Toggle Help");
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glRasterPos2i(60, 360);
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printstring(GLUT_BITMAP_TIMES_ROMAN_24, "t - Increase particle size");
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glRasterPos2i(60, 330);
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printstring(GLUT_BITMAP_TIMES_ROMAN_24, "T - Decrease particle size");
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glRasterPos2i(60, 300);
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printstring(GLUT_BITMAP_TIMES_ROMAN_24, "r - Increase emission radius");
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glRasterPos2i(60, 270);
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printstring(GLUT_BITMAP_TIMES_ROMAN_24, "R - Decrease emission radius");
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glRasterPos2i(60, 240);
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printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Toggle Fog");
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glRasterPos2i(60, 210);
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printstring(GLUT_BITMAP_TIMES_ROMAN_24, "s - Toggle shadows");
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glRasterPos2i(60, 180);
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printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Arrow Keys - Rotate");
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glRasterPos2i(60, 150);
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printstring(GLUT_BITMAP_TIMES_ROMAN_24, "a - Increase velocity");
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glRasterPos2i(60, 120);
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printstring(GLUT_BITMAP_TIMES_ROMAN_24, "z - Decrease velocity");
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glRasterPos2i(60, 90);
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if (joyavailable)
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printstring(GLUT_BITMAP_TIMES_ROMAN_24,
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"j - Toggle jostick control (Joystick control available)");
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else
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printstring(GLUT_BITMAP_TIMES_ROMAN_24,
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"(No Joystick control available)");
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}
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static void
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dojoy(void)
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{
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#ifdef WIN32
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static UINT max[2] = { 0, 0 };
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static UINT min[2] = { 0xffffffff, 0xffffffff }, center[2];
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MMRESULT res;
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JOYINFO joy;
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res = joyGetPos(JOYSTICKID1, &joy);
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if (res == JOYERR_NOERROR) {
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joyavailable = 1;
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if (max[0] < joy.wXpos)
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max[0] = joy.wXpos;
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if (min[0] > joy.wXpos)
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min[0] = joy.wXpos;
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center[0] = (max[0] + min[0]) / 2;
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if (max[1] < joy.wYpos)
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max[1] = joy.wYpos;
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if (min[1] > joy.wYpos)
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min[1] = joy.wYpos;
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center[1] = (max[1] + min[1]) / 2;
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if (joyactive) {
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if (fabs(center[0] - (float) joy.wXpos) > 0.1 * (max[0] - min[0]))
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alpha +=
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2.5 * (center[0] - (float) joy.wXpos) / (max[0] - min[0]);
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if (fabs(center[1] - (float) joy.wYpos) > 0.1 * (max[1] - min[1]))
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beta += 2.5 * (center[1] - (float) joy.wYpos) / (max[1] - min[1]);
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if (joy.wButtons & JOY_BUTTON1)
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v += 0.01;
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if (joy.wButtons & JOY_BUTTON2)
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v -= 0.01;
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}
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}
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else
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joyavailable = 0;
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#endif
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}
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static void
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drawfire(void)
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{
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static char frbuf[80] = "";
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int j;
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static double t0 = -1.;
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double t = glutGet(GLUT_ELAPSED_TIME) / 1000.0;
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if (t0 < 0.0)
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t0 = t;
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dt = (t - t0) * 1.0;
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t0 = t;
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dojoy();
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if (NiceFog)
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glHint(GL_FOG_HINT, GL_NICEST);
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else
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glHint(GL_FOG_HINT, GL_DONT_CARE);
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glEnable(GL_DEPTH_TEST);
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if (fog)
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glEnable(GL_FOG);
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else
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glDisable(GL_FOG);
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glDepthMask(GL_TRUE);
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glClearColor(1.0, 1.0, 1.0, 1.0);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glPushMatrix();
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calcposobs();
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gluLookAt(obs[0], obs[1], obs[2],
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obs[0] + dir[0], obs[1] + dir[1], obs[2] + dir[2],
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0.0, 1.0, 0.0);
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glColor4f(1.0, 1.0, 1.0, 1.0);
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glEnable(GL_TEXTURE_2D);
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glBindTexture(GL_TEXTURE_2D, groundid);
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#if 1
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glBegin(GL_QUADS);
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glTexCoord2fv(qt[0]);
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glVertex3fv(q[0]);
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glTexCoord2fv(qt[1]);
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glVertex3fv(q[1]);
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glTexCoord2fv(qt[2]);
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glVertex3fv(q[2]);
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glTexCoord2fv(qt[3]);
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glVertex3fv(q[3]);
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glEnd();
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#else
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/* Subdivide the ground into a bunch of quads. This improves fog
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* if GL_FOG_HINT != GL_NICEST
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*/
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{
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float x, y;
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float dx = 1.0, dy = 1.0;
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glBegin(GL_QUADS);
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for (y = -DIMP; y < DIMP; y += 1.0) {
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for (x = -DIMP; x < DIMP; x += 1.0) {
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glTexCoord2f(0, 0); glVertex3f(x, 0, y);
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glTexCoord2f(1, 0); glVertex3f(x+dx, 0, y);
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glTexCoord2f(1, 1); glVertex3f(x+dx, 0, y+dy);
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glTexCoord2f(0, 1); glVertex3f(x, 0, y+dy);
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}
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}
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glEnd();
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}
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#endif
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glEnable(GL_ALPHA_TEST);
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glAlphaFunc(GL_GEQUAL, 0.9);
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glBindTexture(GL_TEXTURE_2D, treeid);
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for (j = 0; j < NUMTREE; j++)
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drawtree(treepos[j][0], treepos[j][1], treepos[j][2]);
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glDisable(GL_TEXTURE_2D);
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glDepthMask(GL_FALSE);
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glDisable(GL_ALPHA_TEST);
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if (shadows) {
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glBegin(GL_TRIANGLES);
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for (j = 0; j < np; j++) {
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glColor4f(black[0], black[1], black[2], p[j].c[0][3]);
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glVertex3f(p[j].p[0][0], 0.1, p[j].p[0][2]);
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glColor4f(black[0], black[1], black[2], p[j].c[1][3]);
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glVertex3f(p[j].p[1][0], 0.1, p[j].p[1][2]);
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glColor4f(black[0], black[1], black[2], p[j].c[2][3]);
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glVertex3f(p[j].p[2][0], 0.1, p[j].p[2][2]);
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}
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glEnd();
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}
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glBegin(GL_TRIANGLES);
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for (j = 0; j < np; j++) {
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glColor4fv(p[j].c[0]);
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glVertex3fv(p[j].p[0]);
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glColor4fv(p[j].c[1]);
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glVertex3fv(p[j].p[1]);
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glColor4fv(p[j].c[2]);
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glVertex3fv(p[j].p[2]);
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setpart(&p[j]);
|
|
}
|
|
glEnd();
|
|
|
|
glDisable(GL_TEXTURE_2D);
|
|
glDisable(GL_ALPHA_TEST);
|
|
glDisable(GL_DEPTH_TEST);
|
|
glDisable(GL_FOG);
|
|
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
glOrtho(-0.5, 639.5, -0.5, 479.5, -1.0, 1.0);
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
|
|
glColor3f(1.0, 0.0, 0.0);
|
|
glRasterPos2i(10, 10);
|
|
printstring(GLUT_BITMAP_HELVETICA_18, frbuf);
|
|
glRasterPos2i(370, 470);
|
|
printstring(GLUT_BITMAP_HELVETICA_10,
|
|
"Fire V1.5 Written by David Bucciarelli (tech.hmw@plus.it)");
|
|
|
|
if (help)
|
|
printhelp();
|
|
|
|
reshape(WIDTH, HEIGHT);
|
|
glPopMatrix();
|
|
|
|
glutSwapBuffers();
|
|
|
|
Frames++;
|
|
{
|
|
GLint t = glutGet(GLUT_ELAPSED_TIME);
|
|
if (t - T0 >= 2000) {
|
|
GLfloat seconds = (t - T0) / 1000.0;
|
|
GLfloat fps = Frames / seconds;
|
|
sprintf(frbuf, "Frame rate: %f", fps);
|
|
T0 = t;
|
|
Frames = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
idle(void)
|
|
{
|
|
glutPostRedisplay();
|
|
}
|
|
|
|
|
|
static void
|
|
special(int key, int x, int y)
|
|
{
|
|
switch (key) {
|
|
case GLUT_KEY_LEFT:
|
|
alpha += 2.0;
|
|
break;
|
|
case GLUT_KEY_RIGHT:
|
|
alpha -= 2.0;
|
|
break;
|
|
case GLUT_KEY_DOWN:
|
|
beta -= 2.0;
|
|
break;
|
|
case GLUT_KEY_UP:
|
|
beta += 2.0;
|
|
break;
|
|
}
|
|
glutPostRedisplay();
|
|
}
|
|
|
|
static void
|
|
key(unsigned char key, int x, int y)
|
|
{
|
|
switch (key) {
|
|
case 27:
|
|
exit(0);
|
|
break;
|
|
|
|
case 'a':
|
|
v += 0.0005;
|
|
break;
|
|
case 'z':
|
|
v -= 0.0005;
|
|
break;
|
|
|
|
case 'j':
|
|
joyactive = (!joyactive);
|
|
break;
|
|
case 'h':
|
|
help = (!help);
|
|
break;
|
|
case 'f':
|
|
fog = (!fog);
|
|
break;
|
|
case 's':
|
|
shadows = !shadows;
|
|
break;
|
|
case 'R':
|
|
eject_r -= 0.03;
|
|
break;
|
|
case 'r':
|
|
eject_r += 0.03;
|
|
break;
|
|
case 't':
|
|
ridtri += 0.005;
|
|
break;
|
|
case 'T':
|
|
ridtri -= 0.005;
|
|
break;
|
|
#ifdef XMESA
|
|
case ' ':
|
|
XMesaSetFXmode(fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW);
|
|
fullscreen = (!fullscreen);
|
|
break;
|
|
#endif
|
|
case 'n':
|
|
NiceFog = !NiceFog;
|
|
printf("NiceFog %d\n", NiceFog);
|
|
break;
|
|
}
|
|
glutPostRedisplay();
|
|
}
|
|
|
|
static void
|
|
inittextures(void)
|
|
{
|
|
GLenum gluerr;
|
|
GLubyte tex[128][128][4];
|
|
|
|
glGenTextures(1, &groundid);
|
|
glBindTexture(GL_TEXTURE_2D, groundid);
|
|
|
|
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
|
|
if (!LoadRGBMipmaps("../images/s128.rgb", GL_RGB)) {
|
|
fprintf(stderr, "Error reading a texture.\n");
|
|
exit(-1);
|
|
}
|
|
|
|
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
|
|
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
|
|
|
|
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
|
|
GL_LINEAR_MIPMAP_LINEAR);
|
|
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
|
|
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
|
|
|
|
glGenTextures(1, &treeid);
|
|
glBindTexture(GL_TEXTURE_2D, treeid);
|
|
|
|
if (1)
|
|
{
|
|
int w, h;
|
|
GLenum format;
|
|
int x, y;
|
|
GLubyte *image = LoadRGBImage("../images/tree3.rgb", &w, &h, &format);
|
|
|
|
if (!image) {
|
|
fprintf(stderr, "Error reading a texture.\n");
|
|
exit(-1);
|
|
}
|
|
|
|
for (y = 0; y < 128; y++)
|
|
for (x = 0; x < 128; x++) {
|
|
tex[x][y][0] = image[(y + x * 128) * 3];
|
|
tex[x][y][1] = image[(y + x * 128) * 3 + 1];
|
|
tex[x][y][2] = image[(y + x * 128) * 3 + 2];
|
|
if ((tex[x][y][0] == tex[x][y][1]) &&
|
|
(tex[x][y][1] == tex[x][y][2]) && (tex[x][y][2] == 255))
|
|
tex[x][y][3] = 0;
|
|
else
|
|
tex[x][y][3] = 255;
|
|
}
|
|
|
|
if ((gluerr = gluBuild2DMipmaps(GL_TEXTURE_2D, 4, 128, 128, GL_RGBA,
|
|
GL_UNSIGNED_BYTE, (GLvoid *) (tex)))) {
|
|
fprintf(stderr, "GLULib%s\n", (char *) gluErrorString(gluerr));
|
|
exit(-1);
|
|
}
|
|
}
|
|
else {
|
|
if (!LoadRGBMipmaps("../images/tree2.rgba", GL_RGBA)) {
|
|
fprintf(stderr, "Error reading a texture.\n");
|
|
exit(-1);
|
|
}
|
|
}
|
|
|
|
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
|
|
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
|
|
|
|
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
|
|
GL_LINEAR_MIPMAP_LINEAR);
|
|
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
|
|
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
|
|
}
|
|
|
|
static void
|
|
inittree(void)
|
|
{
|
|
int i;
|
|
float dist;
|
|
|
|
for (i = 0; i < NUMTREE; i++)
|
|
do {
|
|
treepos[i][0] = vrnd() * TREEOUTR * 2.0 - TREEOUTR;
|
|
treepos[i][1] = 0.0;
|
|
treepos[i][2] = vrnd() * TREEOUTR * 2.0 - TREEOUTR;
|
|
dist =
|
|
sqrt(treepos[i][0] * treepos[i][0] +
|
|
treepos[i][2] * treepos[i][2]);
|
|
} while ((dist < TREEINR) || (dist > TREEOUTR));
|
|
}
|
|
|
|
int
|
|
main(int ac, char **av)
|
|
{
|
|
int i;
|
|
|
|
fprintf(stderr,
|
|
"Fire V1.5\nWritten by David Bucciarelli (tech.hmw@plus.it)\n");
|
|
|
|
/* Default settings */
|
|
|
|
np = 800;
|
|
eject_r = -0.65;
|
|
dt = 0.015;
|
|
eject_vy = 4;
|
|
eject_vl = 1;
|
|
shadows = 1;
|
|
ridtri = 0.25;
|
|
|
|
maxage = 1.0 / dt;
|
|
|
|
if (ac == 2)
|
|
np = atoi(av[1]);
|
|
|
|
if (ac == 4) {
|
|
WIDTH = atoi(av[2]);
|
|
HEIGHT = atoi(av[3]);
|
|
}
|
|
|
|
glutInitWindowSize(WIDTH, HEIGHT);
|
|
glutInit(&ac, av);
|
|
|
|
glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
|
|
|
|
if (!(win = glutCreateWindow("Fire"))) {
|
|
fprintf(stderr, "Error opening a window.\n");
|
|
exit(-1);
|
|
}
|
|
|
|
reshape(WIDTH, HEIGHT);
|
|
|
|
inittextures();
|
|
|
|
glShadeModel(GL_FLAT);
|
|
glEnable(GL_DEPTH_TEST);
|
|
|
|
glEnable(GL_BLEND);
|
|
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
|
|
|
glEnable(GL_FOG);
|
|
glFogi(GL_FOG_MODE, GL_EXP);
|
|
glFogfv(GL_FOG_COLOR, fogcolor);
|
|
glFogf(GL_FOG_DENSITY, 0.1);
|
|
|
|
p = (part *) malloc(sizeof(part) * np);
|
|
|
|
for (i = 0; i < np; i++)
|
|
setnewpart(&p[i]);
|
|
|
|
inittree();
|
|
|
|
glutKeyboardFunc(key);
|
|
glutSpecialFunc(special);
|
|
glutDisplayFunc(drawfire);
|
|
glutIdleFunc(idle);
|
|
glutReshapeFunc(reshape);
|
|
glutMainLoop();
|
|
|
|
return (0);
|
|
}
|