675 lines
15 KiB
C
675 lines
15 KiB
C
/*
|
|
* 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 <time.h>
|
|
|
|
#ifdef WIN32
|
|
#include <windows.h>
|
|
#endif
|
|
|
|
#include <GL/glut.h>
|
|
#include "readtex.c"
|
|
|
|
#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;
|
|
|
|
#define BASESIZE 10.0
|
|
|
|
#define BASERES 12
|
|
#define TEAPOTRES 3
|
|
|
|
#ifndef M_PI
|
|
#define M_PI 3.1415926535
|
|
#endif
|
|
|
|
extern void shadowmatrix(GLfloat [4][4], GLfloat [4], GLfloat [4]);
|
|
extern void findplane(GLfloat [4], GLfloat [3], GLfloat [3], GLfloat [3]);
|
|
|
|
|
|
static int win=0;
|
|
|
|
static float obs[3]={5.0,0.0,1.0};
|
|
static float dir[3];
|
|
static float v=0.0;
|
|
static float alpha=-90.0;
|
|
static float beta=90.0;
|
|
|
|
static GLfloat baseshadow[4][4];
|
|
static GLfloat lightpos[4]={2.3,0.0,3.0,1.0};
|
|
static GLfloat lightdir[3]={-2.3,0.0,-3.0};
|
|
static GLfloat lightalpha=0.0;
|
|
|
|
static int fog=1;
|
|
static int bfcull=1;
|
|
static int usetex=1;
|
|
static int help=1;
|
|
static int joyavailable=0;
|
|
static int joyactive=0;
|
|
|
|
static GLuint t1id,t2id;
|
|
static GLuint teapotdlist,basedlist,lightdlist;
|
|
|
|
|
|
|
|
/******************** begin shadow code ********************/
|
|
|
|
/* Taken from the projshadow.c - by Tom McReynolds, SGI */
|
|
|
|
/* Modified by David Bucciarelli */
|
|
|
|
enum {
|
|
X, Y, Z, W
|
|
};
|
|
enum {
|
|
A, B, C, D
|
|
};
|
|
|
|
/* create a matrix that will project the desired shadow */
|
|
void
|
|
shadowmatrix(GLfloat shadowMat[4][4],
|
|
GLfloat groundplane[4],
|
|
GLfloat lightpos[4])
|
|
{
|
|
GLfloat dot;
|
|
|
|
/* find dot product between light position vector and ground plane normal */
|
|
dot = groundplane[X] * lightpos[X] +
|
|
groundplane[Y] * lightpos[Y] +
|
|
groundplane[Z] * lightpos[Z] +
|
|
groundplane[W] * lightpos[W];
|
|
|
|
shadowMat[0][0] = dot - lightpos[X] * groundplane[X];
|
|
shadowMat[1][0] = 0.f - lightpos[X] * groundplane[Y];
|
|
shadowMat[2][0] = 0.f - lightpos[X] * groundplane[Z];
|
|
shadowMat[3][0] = 0.f - lightpos[X] * groundplane[W];
|
|
|
|
shadowMat[X][1] = 0.f - lightpos[Y] * groundplane[X];
|
|
shadowMat[1][1] = dot - lightpos[Y] * groundplane[Y];
|
|
shadowMat[2][1] = 0.f - lightpos[Y] * groundplane[Z];
|
|
shadowMat[3][1] = 0.f - lightpos[Y] * groundplane[W];
|
|
|
|
shadowMat[X][2] = 0.f - lightpos[Z] * groundplane[X];
|
|
shadowMat[1][2] = 0.f - lightpos[Z] * groundplane[Y];
|
|
shadowMat[2][2] = dot - lightpos[Z] * groundplane[Z];
|
|
shadowMat[3][2] = 0.f - lightpos[Z] * groundplane[W];
|
|
|
|
shadowMat[X][3] = 0.f - lightpos[W] * groundplane[X];
|
|
shadowMat[1][3] = 0.f - lightpos[W] * groundplane[Y];
|
|
shadowMat[2][3] = 0.f - lightpos[W] * groundplane[Z];
|
|
shadowMat[3][3] = dot - lightpos[W] * groundplane[W];
|
|
|
|
}
|
|
|
|
/* find the plane equation given 3 points */
|
|
void
|
|
findplane(GLfloat plane[4],
|
|
GLfloat v0[3], GLfloat v1[3], GLfloat v2[3])
|
|
{
|
|
GLfloat vec0[3], vec1[3];
|
|
|
|
/* need 2 vectors to find cross product */
|
|
vec0[X] = v1[X] - v0[X];
|
|
vec0[Y] = v1[Y] - v0[Y];
|
|
vec0[Z] = v1[Z] - v0[Z];
|
|
|
|
vec1[X] = v2[X] - v0[X];
|
|
vec1[Y] = v2[Y] - v0[Y];
|
|
vec1[Z] = v2[Z] - v0[Z];
|
|
|
|
/* find cross product to get A, B, and C of plane equation */
|
|
plane[A] = vec0[Y] * vec1[Z] - vec0[Z] * vec1[Y];
|
|
plane[B] = -(vec0[X] * vec1[Z] - vec0[Z] * vec1[X]);
|
|
plane[C] = vec0[X] * vec1[Y] - vec0[Y] * vec1[X];
|
|
|
|
plane[D] = -(plane[A] * v0[X] + plane[B] * v0[Y] + plane[C] * v0[Z]);
|
|
}
|
|
|
|
/******************** end shadow code ********************/
|
|
|
|
|
|
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];
|
|
}
|
|
|
|
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 key(unsigned char k, int x, int y)
|
|
{
|
|
switch(k) {
|
|
case 27:
|
|
exit(0);
|
|
break;
|
|
|
|
case 'a':
|
|
v+=0.005;
|
|
break;
|
|
case 'z':
|
|
v-=0.005;
|
|
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;
|
|
#ifdef XMESA
|
|
case ' ':
|
|
XMesaSetFXmode(fullscreen ? XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW);
|
|
fullscreen=(!fullscreen);
|
|
break;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
static void reshape(int w, int h)
|
|
{
|
|
WIDTH=w;
|
|
HEIGHT=h;
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
gluPerspective(45.0,w/(float)h,0.2,40.0);
|
|
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);
|
|
glColor4f(0.5,0.5,0.5,0.5);
|
|
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,"b - Togle Back face culling");
|
|
glRasterPos2i(60,270);
|
|
printstring(GLUT_BITMAP_TIMES_ROMAN_24,"Arrow Keys - Rotate");
|
|
glRasterPos2i(60,240);
|
|
printstring(GLUT_BITMAP_TIMES_ROMAN_24,"a - Increase velocity");
|
|
glRasterPos2i(60,210);
|
|
printstring(GLUT_BITMAP_TIMES_ROMAN_24,"z - Decrease velocity");
|
|
|
|
glRasterPos2i(60,180);
|
|
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 drawbase(void)
|
|
{
|
|
static const GLfloat amb[4] = { 1, .5, 0.2, 1 };
|
|
static const GLfloat diff[4] = { 1, .4, 0.2, 1 };
|
|
int i,j;
|
|
float x,y,dx,dy;
|
|
|
|
glBindTexture(GL_TEXTURE_2D,t1id);
|
|
|
|
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, amb);
|
|
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, diff);
|
|
dx=BASESIZE/BASERES;
|
|
dy=-BASESIZE/BASERES;
|
|
for(y=BASESIZE/2.0,j=0;j<BASERES;y+=dy,j++) {
|
|
glBegin(GL_QUAD_STRIP);
|
|
glColor3f(1.0,1.0,1.0);
|
|
glNormal3f(0.0,0.0,1.0);
|
|
for(x=-BASESIZE/2.0,i=0;i<BASERES;x+=dx,i++) {
|
|
glTexCoord2f(x,y);
|
|
glVertex3f(x,y,0.0);
|
|
|
|
glTexCoord2f(x,y+dy);
|
|
glVertex3f(x,y+dy,0.0);
|
|
}
|
|
glEnd();
|
|
}
|
|
}
|
|
|
|
static void drawteapot(void)
|
|
{
|
|
static const GLfloat amb[4] = { 0.2, 0.2, 0.2, 1 };
|
|
static const GLfloat diff[4] = { 0.8, 0.3, 0.5, 1 };
|
|
static float xrot=0.0;
|
|
static float zrot=0.0;
|
|
|
|
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, amb);
|
|
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, diff);
|
|
|
|
glPushMatrix();
|
|
glRotatef(lightalpha,0.0,0.0,1.0);
|
|
glMultMatrixf((GLfloat *)baseshadow);
|
|
glRotatef(-lightalpha,0.0,0.0,1.0);
|
|
|
|
glTranslatef(0.0,0.0,1.0);
|
|
glRotatef(xrot,1.0,0.0,0.0);
|
|
glRotatef(zrot,0.0,0.0,1.0);
|
|
|
|
glDisable(GL_TEXTURE_2D);
|
|
glDisable(GL_DEPTH_TEST);
|
|
glDisable(GL_LIGHTING);
|
|
|
|
glColor3f(0.0,0.0,0.0);
|
|
glCallList(teapotdlist);
|
|
|
|
glEnable(GL_DEPTH_TEST);
|
|
glEnable(GL_LIGHTING);
|
|
if(usetex)
|
|
glEnable(GL_TEXTURE_2D);
|
|
|
|
glPopMatrix();
|
|
|
|
glPushMatrix();
|
|
glTranslatef(0.0,0.0,1.0);
|
|
glRotatef(xrot,1.0,0.0,0.0);
|
|
glRotatef(zrot,0.0,0.0,1.0);
|
|
|
|
glCallList(teapotdlist);
|
|
glPopMatrix();
|
|
|
|
xrot+=2.0;
|
|
zrot+=1.0;
|
|
}
|
|
|
|
static void drawlight1(void)
|
|
{
|
|
glPushMatrix();
|
|
glRotatef(lightalpha,0.0,0.0,1.0);
|
|
glLightfv(GL_LIGHT0,GL_POSITION,lightpos);
|
|
glLightfv(GL_LIGHT0,GL_SPOT_DIRECTION,lightdir);
|
|
|
|
glPopMatrix();
|
|
}
|
|
|
|
static void drawlight2(void)
|
|
{
|
|
glPushMatrix();
|
|
glRotatef(lightalpha,0.0,0.0,1.0);
|
|
glTranslatef(lightpos[0],lightpos[1],lightpos[2]);
|
|
|
|
glDisable(GL_TEXTURE_2D);
|
|
glCallList(lightdlist);
|
|
if(usetex)
|
|
glEnable(GL_TEXTURE_2D);
|
|
|
|
glPopMatrix();
|
|
|
|
lightalpha+=1.0;
|
|
}
|
|
|
|
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-=2.5*(center[0]-(float)joy.wXpos)/(max[0]-min[0]);
|
|
if(fabs(center[1]-(float)joy.wYpos)>0.1*(max[1]-min[1]))
|
|
beta+=2.5*(center[1]-(float)joy.wYpos)/(max[1]-min[1]);
|
|
|
|
if(joy.wButtons & JOY_BUTTON1)
|
|
v+=0.005;
|
|
if(joy.wButtons & JOY_BUTTON2)
|
|
v-=0.005;
|
|
}
|
|
} else
|
|
joyavailable=0;
|
|
#endif
|
|
}
|
|
|
|
static void draw(void)
|
|
{
|
|
static char frbuf[80] = "";
|
|
|
|
dojoy();
|
|
|
|
glEnable(GL_DEPTH_TEST);
|
|
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);
|
|
|
|
glEnable(GL_LIGHTING);
|
|
|
|
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);
|
|
|
|
drawlight1();
|
|
glCallList(basedlist);
|
|
drawteapot();
|
|
drawlight2();
|
|
glPopMatrix();
|
|
|
|
glDisable(GL_LIGHTING);
|
|
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,"Teapot V1.2 Written by David Bucciarelli (tech.hmw@plus.it)");
|
|
|
|
if(help)
|
|
printhelp();
|
|
|
|
reshape(WIDTH,HEIGHT);
|
|
|
|
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 inittextures(void)
|
|
{
|
|
glGenTextures(1,&t1id);
|
|
glBindTexture(GL_TEXTURE_2D,t1id);
|
|
|
|
glPixelStorei(GL_UNPACK_ALIGNMENT,4);
|
|
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_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);
|
|
|
|
glPixelTransferf(GL_RED_SCALE, 0.75);
|
|
glPixelTransferf(GL_RED_BIAS, 0.25);
|
|
glPixelTransferf(GL_GREEN_SCALE, 0.75);
|
|
glPixelTransferf(GL_GREEN_BIAS, 0.25);
|
|
glPixelTransferf(GL_BLUE_SCALE, 0.75);
|
|
glPixelTransferf(GL_BLUE_BIAS, 0.25);
|
|
|
|
if (!LoadRGBMipmaps("../images/bw.rgb", GL_RGB)) {
|
|
fprintf(stderr,"Error reading a texture.\n");
|
|
exit(-1);
|
|
}
|
|
|
|
glPixelTransferf(GL_RED_SCALE, 1.0);
|
|
glPixelTransferf(GL_RED_BIAS, 0.0);
|
|
glPixelTransferf(GL_GREEN_SCALE, 1.0);
|
|
glPixelTransferf(GL_GREEN_BIAS, 0.0);
|
|
glPixelTransferf(GL_BLUE_SCALE, 1.0);
|
|
glPixelTransferf(GL_BLUE_BIAS, 0.0);
|
|
|
|
|
|
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 initlight(void)
|
|
{
|
|
float matamb[4] ={0.5, 0.5, 0.5, 1.0};
|
|
float matdiff[4]={0.9, 0.2, 0.2, 1.0};
|
|
float matspec[4]={1.0,1.0,1.0,1.0};
|
|
|
|
float lamb[4] ={1.5, 1.5, 1.5, 1.0};
|
|
float ldiff[4]={1.0, 1.0, 1.0, 1.0};
|
|
float lspec[4]={1.0, 1.0, 1.0, 1.0};
|
|
|
|
glLightf(GL_LIGHT0,GL_SPOT_CUTOFF,70.0);
|
|
glLightf(GL_LIGHT0,GL_SPOT_EXPONENT,20.0);
|
|
glLightfv(GL_LIGHT0,GL_AMBIENT,lamb);
|
|
glLightfv(GL_LIGHT0,GL_DIFFUSE,ldiff);
|
|
glLightfv(GL_LIGHT0,GL_SPECULAR,lspec);
|
|
|
|
glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 15.0);
|
|
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, matdiff);
|
|
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, matspec);
|
|
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, matamb);
|
|
|
|
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lamb);
|
|
glEnable(GL_LIGHT0);
|
|
}
|
|
|
|
static void initdlists(void)
|
|
{
|
|
GLUquadricObj *lcone,*lbase;
|
|
GLfloat plane[4];
|
|
GLfloat v0[3]={0.0,0.0,0.0};
|
|
GLfloat v1[3]={1.0,0.0,0.0};
|
|
GLfloat v2[3]={0.0,1.0,0.0};
|
|
|
|
findplane(plane,v0,v1,v2);
|
|
shadowmatrix(baseshadow,plane,lightpos);
|
|
|
|
teapotdlist=glGenLists(1);
|
|
glNewList(teapotdlist,GL_COMPILE);
|
|
glRotatef(90.0,1.0,0.0,0.0);
|
|
glCullFace(GL_FRONT);
|
|
glBindTexture(GL_TEXTURE_2D,t2id);
|
|
glutSolidTeapot(0.75);
|
|
glCullFace(GL_BACK);
|
|
glEndList();
|
|
|
|
basedlist=glGenLists(1);
|
|
glNewList(basedlist,GL_COMPILE);
|
|
drawbase();
|
|
glEndList();
|
|
|
|
lightdlist=glGenLists(1);
|
|
glNewList(lightdlist,GL_COMPILE);
|
|
glDisable(GL_LIGHTING);
|
|
|
|
lcone=gluNewQuadric();
|
|
lbase=gluNewQuadric();
|
|
glRotatef(45.0,0.0,1.0,0.0);
|
|
|
|
glColor3f(1.0,1.0,1.0);
|
|
glCullFace(GL_FRONT);
|
|
gluDisk(lbase,0.0,0.2,12.0,1.0);
|
|
glCullFace(GL_BACK);
|
|
|
|
glColor3f(0.5,0.0,0.0);
|
|
gluCylinder(lcone,0.2,0.0,0.5,12,1);
|
|
|
|
gluDeleteQuadric(lcone);
|
|
gluDeleteQuadric(lbase);
|
|
|
|
glEnable(GL_LIGHTING);
|
|
glEndList();
|
|
}
|
|
|
|
int main(int ac, char **av)
|
|
{
|
|
float fogcolor[4]={0.025,0.025,0.025,1.0};
|
|
|
|
fprintf(stderr,"Teapot V1.2\nWritten by David Bucciarelli (tech.hmw@plus.it)\n");
|
|
|
|
/*
|
|
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;
|
|
}
|
|
*/
|
|
|
|
glutInitWindowPosition(0,0);
|
|
glutInitWindowSize(WIDTH,HEIGHT);
|
|
glutInit(&ac,av);
|
|
|
|
glutInitDisplayMode(GLUT_RGB|GLUT_DEPTH|GLUT_DOUBLE);
|
|
|
|
if(!(win=glutCreateWindow("Teapot"))) {
|
|
fprintf(stderr,"Error, couldn't open window\n");
|
|
return -1;
|
|
}
|
|
|
|
reshape(WIDTH,HEIGHT);
|
|
|
|
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,0.04);
|
|
glHint(GL_FOG_HINT,GL_NICEST);
|
|
glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
|
|
|
|
calcposobs();
|
|
|
|
inittextures();
|
|
initlight();
|
|
|
|
initdlists();
|
|
|
|
glClearColor(fogcolor[0],fogcolor[1],fogcolor[2],fogcolor[3]);
|
|
|
|
glutReshapeFunc(reshape);
|
|
glutDisplayFunc(draw);
|
|
glutKeyboardFunc(key);
|
|
glutSpecialFunc(special);
|
|
glutIdleFunc(draw);
|
|
|
|
glutMainLoop();
|
|
|
|
return 0;
|
|
}
|