/* * This program is under the GNU GPL. * Use at your own risk. * * written by David Bucciarelli (tech.hmw@plus.it) * Humanware s.r.l. */ #include <stdio.h> #include <stdlib.h> #include <math.h> #include <string.h> #ifdef WIN32 #include <windows.h> #endif #include <GL/glut.h> #include "readtex.h" #include "tunneldat.h" #ifdef XMESA #include "GL/xmesa.h" static int fullscreen = 1; #endif static int WIDTH = 640; static int HEIGHT = 480; static GLint T0 = 0; static GLint Frames = 0; static GLint NiceFog = 1; #define NUMBLOC 5 #ifndef M_PI #define M_PI 3.1415926535 #endif /* extern int striplength_skin_13[]; extern float stripdata_skin_13[]; extern int striplength_skin_12[]; extern float stripdata_skin_12[]; extern int striplength_skin_11[]; extern float stripdata_skin_11[]; extern int striplength_skin_9[]; extern float stripdata_skin_9[]; */ static int win = 0; static float obs[3] = { 1000.0, 0.0, 2.0 }; static float dir[3]; static float v = 30.; static float alpha = 90.0; static float beta = 90.0; static int fog = 1; static int bfcull = 1; static int usetex = 1; static int cstrip = 0; static int help = 1; static int joyavailable = 0; static int joyactive = 0; static GLuint t1id, t2id; static void inittextures(void) { glGenTextures(1, &t1id); glBindTexture(GL_TEXTURE_2D, t1id); if (!LoadRGBMipmaps("../images/tile.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_NEAREST); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glGenTextures(1, &t2id); glBindTexture(GL_TEXTURE_2D, t2id); if (!LoadRGBMipmaps("../images/bw.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_MODULATE); } static void drawobjs(const int *l, const float *f) { int mend, j; if (cstrip) { float r = 0.33, g = 0.33, b = 0.33; for (; (*l) != 0;) { mend = *l++; r += 0.33; if (r > 1.0) { r = 0.33; g += 0.33; if (g > 1.0) { g = 0.33; b += 0.33; if (b > 1.0) b = 0.33; } } glColor3f(r, g, b); glBegin(GL_TRIANGLE_STRIP); for (j = 0; j < mend; j++) { f += 4; glTexCoord2fv(f); f += 2; glVertex3fv(f); f += 3; } glEnd(); } } else for (; (*l) != 0;) { mend = *l++; glBegin(GL_TRIANGLE_STRIP); for (j = 0; j < mend; j++) { glColor4fv(f); f += 4; glTexCoord2fv(f); f += 2; glVertex3fv(f); f += 3; } glEnd(); } } static void calcposobs(void) { static double t0 = -1.; double dt, t = glutGet(GLUT_ELAPSED_TIME) / 1000.0; if (t0 < 0.0) t0 = t; dt = t - t0; t0 = t; dir[0] = sin(alpha * M_PI / 180.0); dir[1] = cos(alpha * M_PI / 180.0) * sin(beta * M_PI / 180.0); dir[2] = cos(beta * M_PI / 180.0); if (dir[0] < 1.0e-5 && dir[0] > -1.0e-5) dir[0] = 0; if (dir[1] < 1.0e-5 && dir[1] > -1.0e-5) dir[1] = 0; if (dir[2] < 1.0e-5 && dir[2] > -1.0e-5) dir[2] = 0; obs[0] += v * dir[0] * dt; obs[1] += v * dir[1] * dt; obs[2] += v * dir[2] * dt; } static void special(int k, int x, int y) { switch (k) { 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; } } static void cleanup(void) { glDeleteTextures(1, &t1id); glDeleteTextures(1, &t2id); } static void key(unsigned char k, int x, int y) { switch (k) { case 27: cleanup(); exit(0); break; case 'a': v += 5.; break; case 'z': v -= 5.; break; #ifdef XMESA case ' ': fullscreen = (!fullscreen); XMesaSetFXmode(fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW); break; #endif case 'j': joyactive = (!joyactive); break; case 'h': help = (!help); break; case 'f': fog = (!fog); break; case 't': usetex = (!usetex); break; case 'b': if (bfcull) { glDisable(GL_CULL_FACE); bfcull = 0; } else { glEnable(GL_CULL_FACE); bfcull = 1; } break; case 'm': cstrip = (!cstrip); break; case 'd': fprintf(stderr, "Deleting textures...\n"); glDeleteTextures(1, &t1id); glDeleteTextures(1, &t2id); fprintf(stderr, "Loading textures...\n"); inittextures(); fprintf(stderr, "Done.\n"); break; case 'n': NiceFog = !NiceFog; printf("NiceFog %d\n", NiceFog); break; } glutPostRedisplay(); } static void reshape(int w, int h) { WIDTH = w; HEIGHT = h; glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(80.0, w / (float) h, 1.0, 50.0); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glViewport(0, 0, w, h); } static void printstring(void *font, char *string) { int len, i; len = (int) strlen(string); for (i = 0; i < len; i++) glutBitmapCharacter(font, string[i]); } static void printhelp(void) { glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glColor4f(0.0, 0.0, 0.0, 0.5); glRecti(40, 40, 600, 440); glColor3f(1.0, 0.0, 0.0); glRasterPos2i(300, 420); printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Help"); glRasterPos2i(60, 390); printstring(GLUT_BITMAP_TIMES_ROMAN_24, "h - Toggle Help"); glRasterPos2i(60, 360); printstring(GLUT_BITMAP_TIMES_ROMAN_24, "t - Toggle Textures"); glRasterPos2i(60, 330); printstring(GLUT_BITMAP_TIMES_ROMAN_24, "f - Toggle Fog"); glRasterPos2i(60, 300); printstring(GLUT_BITMAP_TIMES_ROMAN_24, "m - Toggle strips"); glRasterPos2i(60, 270); printstring(GLUT_BITMAP_TIMES_ROMAN_24, "b - Toggle Back face culling"); glRasterPos2i(60, 240); printstring(GLUT_BITMAP_TIMES_ROMAN_24, "Arrow Keys - Rotate"); glRasterPos2i(60, 210); printstring(GLUT_BITMAP_TIMES_ROMAN_24, "a - Increase velocity"); glRasterPos2i(60, 180); printstring(GLUT_BITMAP_TIMES_ROMAN_24, "z - Decrease velocity"); glRasterPos2i(60, 150); if (joyavailable) printstring(GLUT_BITMAP_TIMES_ROMAN_24, "j - Toggle jostick control (Joystick control available)"); else printstring(GLUT_BITMAP_TIMES_ROMAN_24, "(No Joystick control available)"); } static void dojoy(void) { #ifdef WIN32 static UINT max[2] = { 0, 0 }; static UINT min[2] = { 0xffffffff, 0xffffffff }, center[2]; MMRESULT res; JOYINFO joy; res = joyGetPos(JOYSTICKID1, &joy); if (res == JOYERR_NOERROR) { joyavailable = 1; if (max[0] < joy.wXpos) max[0] = joy.wXpos; if (min[0] > joy.wXpos) min[0] = joy.wXpos; center[0] = (max[0] + min[0]) / 2; if (max[1] < joy.wYpos) max[1] = joy.wYpos; if (min[1] > joy.wYpos) min[1] = joy.wYpos; center[1] = (max[1] + min[1]) / 2; if (joyactive) { if (fabs(center[0] - (float) joy.wXpos) > 0.1 * (max[0] - min[0])) alpha -= 2.0 * (center[0] - (float) joy.wXpos) / (max[0] - min[0]); if (fabs(center[1] - (float) joy.wYpos) > 0.1 * (max[1] - min[1])) beta += 2.0 * (center[1] - (float) joy.wYpos) / (max[1] - min[1]); if (joy.wButtons & JOY_BUTTON1) v += 0.01; if (joy.wButtons & JOY_BUTTON2) v -= 0.01; } } else joyavailable = 0; #endif } static void draw(void) { static char frbuf[80] = ""; int i; float base, offset; if (NiceFog) glHint(GL_FOG_HINT, GL_NICEST); else glHint(GL_FOG_HINT, GL_DONT_CARE); dojoy(); glClear(GL_COLOR_BUFFER_BIT); if (usetex) glEnable(GL_TEXTURE_2D); else glDisable(GL_TEXTURE_2D); if (fog) glEnable(GL_FOG); else glDisable(GL_FOG); glShadeModel(GL_SMOOTH); glPushMatrix(); calcposobs(); gluLookAt(obs[0], obs[1], obs[2], obs[0] + dir[0], obs[1] + dir[1], obs[2] + dir[2], 0.0, 0.0, 1.0); if (dir[0] > 0) { offset = 8.0; base = obs[0] - fmod(obs[0], 8.0); } else { offset = -8.0; base = obs[0] + (8.0 - fmod(obs[0], 8.0)); } glPushMatrix(); glTranslatef(base - offset / 2.0, 0.0, 0.0); for (i = 0; i < NUMBLOC; i++) { glTranslatef(offset, 0.0, 0.0); glBindTexture(GL_TEXTURE_2D, t1id); drawobjs(striplength_skin_11, stripdata_skin_11); glBindTexture(GL_TEXTURE_2D, t2id); drawobjs(striplength_skin_12, stripdata_skin_12); drawobjs(striplength_skin_9, stripdata_skin_9); drawobjs(striplength_skin_13, stripdata_skin_13); } glPopMatrix(); glPopMatrix(); glDisable(GL_TEXTURE_2D); glDisable(GL_FOG); glShadeModel(GL_FLAT); glMatrixMode(GL_PROJECTION); glPushMatrix(); 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(350, 470); printstring(GLUT_BITMAP_HELVETICA_10, "Tunnel V1.5 Written by David Bucciarelli (tech.hmw@plus.it)"); if (help) printhelp(); glMatrixMode(GL_PROJECTION); glPopMatrix(); glMatrixMode(GL_MODELVIEW); 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(); } int main(int ac, char **av) { float fogcolor[4] = { 0.7, 0.7, 0.7, 1.0 }; fprintf(stderr, "Tunnel V1.5\nWritten by David Bucciarelli (tech.hmw@plus.it)\n"); glutInitWindowPosition(0, 0); glutInitWindowSize(WIDTH, HEIGHT); glutInit(&ac, av); glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE); if (!(win = glutCreateWindow("Tunnel"))) { fprintf(stderr, "Error, couldn't open window\n"); return -1; } glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(80.0, WIDTH / (float) HEIGHT, 1.0, 50.0); glMatrixMode(GL_MODELVIEW); glShadeModel(GL_SMOOTH); glDisable(GL_DEPTH_TEST); glEnable(GL_CULL_FACE); glEnable(GL_TEXTURE_2D); glEnable(GL_FOG); glFogi(GL_FOG_MODE, GL_EXP2); glFogfv(GL_FOG_COLOR, fogcolor); glFogf(GL_FOG_DENSITY, 0.06); glHint(GL_FOG_HINT, GL_NICEST); inittextures(); glClearColor(fogcolor[0], fogcolor[1], fogcolor[2], fogcolor[3]); glClear(GL_COLOR_BUFFER_BIT); calcposobs(); glutReshapeFunc(reshape); glutDisplayFunc(draw); glutKeyboardFunc(key); glutSpecialFunc(special); glutIdleFunc(idle); glEnable(GL_BLEND); /*glBlendFunc(GL_SRC_ALPHA_SATURATE,GL_ONE); */ /*glEnable(GL_POLYGON_SMOOTH); */ glutMainLoop(); cleanup(); return 0; }