536 lines
11 KiB
C
536 lines
11 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 <string.h>
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#ifdef WIN32
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#include <windows.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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#include "tunneldat.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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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 NUMBLOC 5
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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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/*
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extern int striplength_skin_13[];
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extern float stripdata_skin_13[];
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extern int striplength_skin_12[];
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extern float stripdata_skin_12[];
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extern int striplength_skin_11[];
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extern float stripdata_skin_11[];
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extern int striplength_skin_9[];
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extern float stripdata_skin_9[];
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*/
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static int win = 0;
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static float obs[3] = { 1000.0, 0.0, 2.0 };
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static float dir[3];
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static float v = 30.;
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static float alpha = 90.0;
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static float beta = 90.0;
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static int fog = 1;
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static int bfcull = 1;
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static int usetex = 1;
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static int cstrip = 0;
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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 GLuint t1id, t2id;
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static void
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inittextures(void)
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{
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glGenTextures(1, &t1id);
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glBindTexture(GL_TEXTURE_2D, t1id);
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if (!LoadRGBMipmaps("../images/tile.rgb", GL_RGB)) {
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fprintf(stderr, "Error reading a texture.\n");
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exit(-1);
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}
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
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GL_LINEAR_MIPMAP_NEAREST);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glGenTextures(1, &t2id);
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glBindTexture(GL_TEXTURE_2D, t2id);
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if (!LoadRGBMipmaps("../images/bw.rgb", GL_RGB)) {
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fprintf(stderr, "Error reading a texture.\n");
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exit(-1);
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}
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
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GL_LINEAR_MIPMAP_LINEAR);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
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}
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static void
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drawobjs(const int *l, const float *f)
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{
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int mend, j;
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if (cstrip) {
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float r = 0.33, g = 0.33, b = 0.33;
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for (; (*l) != 0;) {
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mend = *l++;
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r += 0.33;
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if (r > 1.0) {
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r = 0.33;
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g += 0.33;
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if (g > 1.0) {
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g = 0.33;
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b += 0.33;
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if (b > 1.0)
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b = 0.33;
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}
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}
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glColor3f(r, g, b);
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glBegin(GL_TRIANGLE_STRIP);
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for (j = 0; j < mend; j++) {
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f += 4;
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glTexCoord2fv(f);
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f += 2;
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glVertex3fv(f);
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f += 3;
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}
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glEnd();
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}
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}
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else
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for (; (*l) != 0;) {
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mend = *l++;
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glBegin(GL_TRIANGLE_STRIP);
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for (j = 0; j < mend; j++) {
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glColor4fv(f);
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f += 4;
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glTexCoord2fv(f);
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f += 2;
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glVertex3fv(f);
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f += 3;
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}
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glEnd();
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}
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}
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static void
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calcposobs(void)
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{
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static double t0 = -1.;
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double dt, 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;
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t0 = t;
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dir[0] = sin(alpha * M_PI / 180.0);
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dir[1] = cos(alpha * M_PI / 180.0) * sin(beta * M_PI / 180.0);
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dir[2] = 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] * dt;
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obs[1] += v * dir[1] * dt;
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obs[2] += v * dir[2] * dt;
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}
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static void
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special(int k, int x, int y)
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{
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switch (k) {
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case GLUT_KEY_LEFT:
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alpha -= 2.0;
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break;
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case GLUT_KEY_RIGHT:
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alpha += 2.0;
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break;
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case GLUT_KEY_DOWN:
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beta -= 2.0;
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break;
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case GLUT_KEY_UP:
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beta += 2.0;
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break;
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}
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}
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static void
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key(unsigned char k, int x, int y)
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{
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switch (k) {
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case 27:
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exit(0);
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break;
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case 'a':
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v += 5.;
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break;
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case 'z':
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v -= 5.;
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break;
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#ifdef XMESA
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case ' ':
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fullscreen = (!fullscreen);
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XMesaSetFXmode(fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW);
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break;
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#endif
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case 'j':
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joyactive = (!joyactive);
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break;
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case 'h':
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help = (!help);
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break;
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case 'f':
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fog = (!fog);
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break;
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case 't':
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usetex = (!usetex);
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break;
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case 'b':
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if (bfcull) {
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glDisable(GL_CULL_FACE);
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bfcull = 0;
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}
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else {
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glEnable(GL_CULL_FACE);
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bfcull = 1;
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}
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break;
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case 'm':
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cstrip = (!cstrip);
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break;
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case 'd':
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fprintf(stderr, "Deleting textures...\n");
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glDeleteTextures(1, &t1id);
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glDeleteTextures(1, &t2id);
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fprintf(stderr, "Loading textures...\n");
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inittextures();
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fprintf(stderr, "Done.\n");
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break;
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case 'n':
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NiceFog = !NiceFog;
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printf("NiceFog %d\n", NiceFog);
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break;
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}
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glutPostRedisplay();
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}
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static void
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reshape(int w, int h)
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{
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WIDTH = w;
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HEIGHT = h;
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluPerspective(80.0, w / (float) h, 1.0, 50.0);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glViewport(0, 0, w, h);
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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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printhelp(void)
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{
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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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 - Toggle Textures");
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glRasterPos2i(60, 330);
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printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Toggle Fog");
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glRasterPos2i(60, 300);
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printstring(GLUT_BITMAP_TIMES_ROMAN_24, "m - Toggle strips");
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glRasterPos2i(60, 270);
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printstring(GLUT_BITMAP_TIMES_ROMAN_24, "b - Toggle Back face culling");
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glRasterPos2i(60, 240);
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printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Arrow Keys - Rotate");
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glRasterPos2i(60, 210);
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printstring(GLUT_BITMAP_TIMES_ROMAN_24, "a - Increase velocity");
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glRasterPos2i(60, 180);
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printstring(GLUT_BITMAP_TIMES_ROMAN_24, "z - Decrease velocity");
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glRasterPos2i(60, 150);
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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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2.0 * (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 += 2.0 * (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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draw(void)
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{
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static char frbuf[80] = "";
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int i;
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float base, offset;
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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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dojoy();
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glClear(GL_COLOR_BUFFER_BIT);
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if (usetex)
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glEnable(GL_TEXTURE_2D);
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else
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glDisable(GL_TEXTURE_2D);
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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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glShadeModel(GL_SMOOTH);
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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, 0.0, 1.0);
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if (dir[0] > 0) {
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offset = 8.0;
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base = obs[0] - fmod(obs[0], 8.0);
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}
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else {
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offset = -8.0;
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base = obs[0] + (8.0 - fmod(obs[0], 8.0));
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}
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glPushMatrix();
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glTranslatef(base - offset / 2.0, 0.0, 0.0);
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for (i = 0; i < NUMBLOC; i++) {
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glTranslatef(offset, 0.0, 0.0);
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glBindTexture(GL_TEXTURE_2D, t1id);
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drawobjs(striplength_skin_11, stripdata_skin_11);
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glBindTexture(GL_TEXTURE_2D, t2id);
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drawobjs(striplength_skin_12, stripdata_skin_12);
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drawobjs(striplength_skin_9, stripdata_skin_9);
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drawobjs(striplength_skin_13, stripdata_skin_13);
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}
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glPopMatrix();
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glPopMatrix();
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glDisable(GL_TEXTURE_2D);
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glDisable(GL_FOG);
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glShadeModel(GL_FLAT);
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glMatrixMode(GL_PROJECTION);
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glPushMatrix();
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glLoadIdentity();
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glOrtho(-0.5, 639.5, -0.5, 479.5, -1.0, 1.0);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glColor3f(1.0, 0.0, 0.0);
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glRasterPos2i(10, 10);
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printstring(GLUT_BITMAP_HELVETICA_18, frbuf);
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glRasterPos2i(350, 470);
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printstring(GLUT_BITMAP_HELVETICA_10,
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"Tunnel V1.5 Written by David Bucciarelli (tech.hmw@plus.it)");
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if (help)
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printhelp();
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glMatrixMode(GL_PROJECTION);
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glPopMatrix();
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glMatrixMode(GL_MODELVIEW);
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glutSwapBuffers();
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Frames++;
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{
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GLint t = glutGet(GLUT_ELAPSED_TIME);
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if (t - T0 >= 2000) {
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GLfloat seconds = (t - T0) / 1000.0;
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GLfloat fps = Frames / seconds;
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sprintf(frbuf, "Frame rate: %f", fps);
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T0 = t;
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Frames = 0;
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}
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}
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}
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static void
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idle(void)
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{
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glutPostRedisplay();
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}
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int
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main(int ac, char **av)
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{
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float fogcolor[4] = { 0.7, 0.7, 0.7, 1.0 };
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fprintf(stderr,
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"Tunnel V1.5\nWritten by David Bucciarelli (tech.hmw@plus.it)\n");
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glutInitWindowPosition(0, 0);
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glutInitWindowSize(WIDTH, HEIGHT);
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glutInit(&ac, av);
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glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
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if (!(win = glutCreateWindow("Tunnel"))) {
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fprintf(stderr, "Error, couldn't open window\n");
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return -1;
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}
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluPerspective(80.0, WIDTH / (float) HEIGHT, 1.0, 50.0);
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glMatrixMode(GL_MODELVIEW);
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glShadeModel(GL_SMOOTH);
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glDisable(GL_DEPTH_TEST);
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glEnable(GL_CULL_FACE);
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glEnable(GL_TEXTURE_2D);
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glEnable(GL_FOG);
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glFogi(GL_FOG_MODE, GL_EXP2);
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glFogfv(GL_FOG_COLOR, fogcolor);
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glFogf(GL_FOG_DENSITY, 0.06);
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glHint(GL_FOG_HINT, GL_NICEST);
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inittextures();
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glClearColor(fogcolor[0], fogcolor[1], fogcolor[2], fogcolor[3]);
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glClear(GL_COLOR_BUFFER_BIT);
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calcposobs();
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glutReshapeFunc(reshape);
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glutDisplayFunc(draw);
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glutKeyboardFunc(key);
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glutSpecialFunc(special);
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glutIdleFunc(idle);
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glEnable(GL_BLEND);
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/*glBlendFunc(GL_SRC_ALPHA_SATURATE,GL_ONE); */
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/*glEnable(GL_POLYGON_SMOOTH); */
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glutMainLoop();
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return 0;
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}
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