tunnel.c
上传用户:xk288cn
上传日期:2007-05-28
资源大小:4876k
文件大小:12k
- /*
- * 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 <string.h>
- #include <math.h>
- #include <time.h>
- #ifdef _WIN32
- #include <windows.h>
- #endif
- #include <GL/glut.h>
- #if defined(GL_VERSION_1_1)
- /* Routines called directly. */
- #elif defined(GL_EXT_texture_object) && defined(GL_EXT_copy_texture) && defined(GL_EXT_subtexture)
- #define glBindTexture(A,B) glBindTextureEXT(A,B)
- #define glGenTextures(A,B) glGenTexturesEXT(A,B)
- #define glDeleteTextures(A,B) glDeleteTexturesEXT(A,B)
- #else
- #define glBindTexture(A,B)
- #define glGenTextures(A,B)
- #define glDeleteTextures(A,B)
- #endif
- #include "image.h"
- static int WIDTH=640;
- static int HEIGHT=480;
- #define FRAME 50
- #define NUMBLOC 5
- /* Some <math.h> files do not define M_PI... */
- #ifndef M_PI
- #define M_PI 3.14159265358979323846
- #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 float obs[3]={1000.0,0.0,2.0};
- static float dir[3];
- static float v=0.0;
- 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)
- {
- IMAGE *img;
- GLenum gluerr;
-
- glGenTextures(1,&t1id);
- glBindTexture(GL_TEXTURE_2D,t1id);
- if(!(img=ImageLoad("tile.rgb"))) {
- fprintf(stderr,"Error reading a texture.n");
- exit(-1);
- }
- glPixelStorei(GL_UNPACK_ALIGNMENT,4);
- if((gluerr=gluBuild2DMipmaps(GL_TEXTURE_2D, 3, img->sizeX, img->sizeY, GL_RGB,
- GL_UNSIGNED_BYTE, (GLvoid *)(img->data)))) {
- fprintf(stderr,"GLULib%sn",gluErrorString(gluerr));
- 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_NEAREST_MIPMAP_LINEAR);
- glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
- glTexEnvf(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_MODULATE);
- glGenTextures(1,&t2id);
- glBindTexture(GL_TEXTURE_2D,t2id);
- if(!(img=ImageLoad("bw.rgb"))) {
- fprintf(stderr,"Error reading a texture.n");
- exit(-1);
- }
- glPixelStorei(GL_UNPACK_ALIGNMENT,4);
- if((gluerr=gluBuild2DMipmaps(GL_TEXTURE_2D, 3, img->sizeX, img->sizeY, GL_RGB,
- GL_UNSIGNED_BYTE, (GLvoid *)(img->data)))) {
- fprintf(stderr,"GLULib%sn",gluErrorString(gluerr));
- 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_NEAREST_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(int *l, 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 float gettime(void)
- {
- static clock_t told=0;
- clock_t tnew,ris;
- tnew=clock();
- ris=tnew-told;
- told=tnew;
- return(ris/(float)CLOCKS_PER_SEC);
- }
- static void calcposobs(void)
- {
- 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);
- obs[0]+=v*dir[0];
- obs[1]+=v*dir[1];
- obs[2]+=v*dir[2];
- }
- /* ARGSUSED1 */
- 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;
- }
- }
- /* ARGSUSED1 */
- static void key(unsigned char k, int x, int y)
- {
- switch(k) {
- case 27:
- exit(0);
- break;
-
- case 'a':
- v+=0.01;
- break;
- case 'z':
- v-=0.01;
- break;
- 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;
- }
- }
- 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)
- {
- glEnable(GL_BLEND);
- glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
- glColor4f(0.0,0.0,0.0,0.5);
- glRecti(40,40,600,440);
- glDisable(GL_BLEND);
- 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 - Togle Help");
- glRasterPos2i(60,360);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24,"t - Togle Textures");
- glRasterPos2i(60,330);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24,"f - Togle Fog");
- glRasterPos2i(60,300);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24,"m - Togle strips");
- glRasterPos2i(60,270);
- printstring(GLUT_BITMAP_TIMES_ROMAN_24,"b - Togle 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 - Togle 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 int count=0;
- static char frbuf[80];
- int i;
- float fr,base,offset;
- dojoy();
- glEnable(GL_DEPTH_TEST);
- /*
- if(count & 1) {
- glDepthRange(1.0,0.5);
- glDepthFunc(GL_GREATER);
- } else {
- glDepthRange(0.0,0.5);
- glDepthFunc(GL_LESS);
- }
- */
- /*glClear(GL_COLOR_BUFFER_BIT);*/
- glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_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();
- if((count % FRAME)==0) {
- fr=gettime();
- sprintf(frbuf,"Frame rate: %f",FRAME/fr);
- }
- glDisable(GL_TEXTURE_2D);
- glDisable(GL_DEPTH_TEST);
- glDisable(GL_FOG);
- glShadeModel(GL_FLAT);
- 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(350,470);
- printstring(GLUT_BITMAP_HELVETICA_10,"Tunnel V1.3 Written by David Bucciarelli (tech.hmw@plus.it)");
- if(help)
- printhelp();
- reshape(WIDTH,HEIGHT);
- glutSwapBuffers();
-
- count++;
- }
- int main(int ac, char **av)
- {
- float fogcolor[4]={0.7,0.7,0.7,1.0};
- fprintf(stderr,"Tunnel V1.3nWritten by David Bucciarelli (tech.hmw@plus.it)n");
- /*
- #ifdef _WIN32
- if(!SetPriorityClass(GetCurrentProcess(),REALTIME_PRIORITY_CLASS)) {
- fprintf(stderr,"Error setting the process class.n");
- return 0;
- }
- if(!SetThreadPriority(GetCurrentThread(),THREAD_PRIORITY_TIME_CRITICAL)) {
- fprintf(stderr,"Error setting the process priority.n");
- return 0;
- }
- #endif
- */
- glutInitWindowPosition(0,0);
- glutInitWindowSize(WIDTH,HEIGHT);
- glutInit(&ac,av);
- glutInitDisplayMode(GLUT_RGB|GLUT_DEPTH|GLUT_DOUBLE);
- glutCreateWindow("Tunnel");
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- gluPerspective(80.0,WIDTH/(float)HEIGHT,1.0,50.0);
- glMatrixMode(GL_MODELVIEW);
- glShadeModel(GL_SMOOTH);
- glEnable(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);
- #ifdef FX
- glHint(GL_FOG_HINT,GL_NICEST);
- /*fxMesaTextureUsePalette(1); */
- #endif
- inittextures();
- #ifndef FX
- glDisable(GL_TEXTURE_2D);
- usetex=0;
- #endif
- glClearColor(fogcolor[0],fogcolor[1],fogcolor[2],fogcolor[3]);
- glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
- calcposobs();
- glutReshapeFunc(reshape);
- glutDisplayFunc(draw);
- glutKeyboardFunc(key);
- glutSpecialFunc(special);
- glutIdleFunc(draw);
- glutMainLoop();
- return 0; /* ANSI C requires main to return int. */
- }