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flight_stereo.c
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/*
*
* Thabang Ngazimbi
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#ifdef WIN32
#include <windows.h>
#endif
#if defined (__APPLE__) || defined(MACOSX)
#include <GLUT/glut.h>
#else
#include <GL/glut.h>
#endif
#include "readoff.h"
#include "readppm.h"
#include "glm.h"
/*****************************************************************/
/******************** MY FUNCTION DEFINITIONS ********************/
/*****************************************************************/
static void myInitGL(void);
static void myInitData(int *argc, char **argv);
static void myInitMenus (void);
static void myInitCheckers(void);
static void myDrawTeapot(GLdouble size);
/* my callback functions needed for GLUT event handling */
static void myHandleMenu(int value);
static void myDisplay(void);
static void myReshape(int width, int height);
static void myMotion(int curx, int cury);
static void myButton(int button, int state, int x, int y);
static void myVisibility(int state);
static void myKeyboard(unsigned char key, int x, int y);
static void myMenus (int value);
static void timerCallback (int value);
void myRollBall (GLfloat pDeltaX, GLfloat pDeltaY, GLfloat *pModelMatrix );
void drawmodel(void);
void drawscene(void);
void drawcircle(float radius);
void pos_nose_camera(void);
void vec_mat_mult( GLfloat M[], GLfloat vec[], GLfloat out_vec[]);
void output(int x, int y, char *string);
#define Radius 10
float normal[3] = {1.0,0.0,0.0};
GLMmodel* pmodel = NULL;
GLMmodel* smodel = NULL;
/***************************************************************/
/******************** MY GLOBAL CONSTANTS **********************/
/***************************************************************/
#define MY_MAX(A,B) ((A) >= (B) ? (A) : (B))
/* my constants for GLUT window defaults */
#define MY_WIND_X_SIZE 600
#define MY_WIND_Y_SIZE 600
#define MY_WIND_X_POS 100
#define MY_WIND_Y_POS 100
/* my menu IDs for GLUT menu-handling functions */
#define MY_MENU_EXIT -9999
#define MY_MENU_RESET -200
#define MY_MENU_CAMERA 20
#define MY_MENU_LIGHT 30
#define MY_MENU_OBJECT 40
#define MY_ROT_LIGHT 50
#define MY_MENU_PROJECT 100
#define MY_CHECKERS_WIDTH 64
#define MY_CHECKERS_HEIGHT 64
#define DEGTORAD (3.14/180.0)
/***************************************************************/
/******************** MY GLOBAL VARIABLES **********************/
/***************************************************************/
/* globals for generated texture - modified from Red Book's original checker.c - */
static GLubyte CheckersImg[MY_CHECKERS_HEIGHT][MY_CHECKERS_WIDTH][3];
static GLuint TextureName;
static GLboolean TextureOn = GL_TRUE;
static GLboolean key_f1 = GL_TRUE;
static GLboolean key_f2 = GL_TRUE;
static TexMap TMap; /* global for texture from readppm */
static GLfloat LightPos0[4];
static GLfloat LightPos1[4];
static GLfloat rot_angle = 0.0;
static GLfloat sunMatrix[16] = {1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1};
static GLfloat planeMatrix[16] = {1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1};
static GLfloat azumMatrix[16] = {1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1};
GLfloat gRotationMatrix[16] = {1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1};
static GLboolean help_display = GL_FALSE;
/* user interaction */
static GLint InteractionMode;
static GLint XmouseDown, YmouseDown;
static GLint XmouseCurrent, YmouseCurrent;
static GLint XmousePrev, YmousePrev, DX, DY;
static GLint WindHeight, WindWidth;
static GLint KeybModifiers;
static GLint mouseButtons = 0;
/* transformations */
static GLdouble TX=0, TY=0, TZ=0;
/* 3D Projection */
static GLdouble XCamera, YCamera, ZCamera;
static GLdouble FOVangle, FOVratio, ClipNear, ClipFar;
#define DUALSTEREO 0
#define ACTIVESTEREO 1
static int stereo = DUALSTEREO ;
/****************************camera struct*******************************/
typedef struct{
float pos[3];
float look_at[3];
float up[3];
}Camera;
Camera nose_camera ;
Camera global_camera ;
static float plane_pos[3] = { 0.0, 0.0, 0.0 };
static GLint pov = 1;
/**************************** MAIN *****************************/
int main(int argc, char **argv) {
glutInit(&argc,argv);
if( stereo == DUALSTEREO )
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH);
else
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH | GLUT_STEREO);
glutInitWindowPosition(MY_WIND_X_POS, MY_WIND_Y_POS);
glutInitWindowSize(MY_WIND_X_SIZE, MY_WIND_Y_SIZE);
glutCreateWindow("B481 template code with 3D lighting");
glutDisplayFunc (myDisplay);
glutReshapeFunc (myReshape);
glutMouseFunc (myButton);
glutMotionFunc (myMotion);
glutPassiveMotionFunc (NULL);
glutIdleFunc (NULL);
glutKeyboardFunc (myKeyboard);
glutVisibilityFunc (myVisibility);
fprintf(stderr,"Press ESC or 'q' to Exit.\n");
myInitGL();
myInitData(&argc,argv); /* pass command line arguments for texture */
/* initialize GLUT menu handler as last one, to take over access
to GLUT_RIGHT_BUTTON, regardles to what other handlers did to it: */
myInitMenus();
glutMainLoop();
return(EXIT_SUCCESS);
} /* main() */
/* --------------------------------------- */
/* initialize my data */
/* --------------------------------------- */
void myInitData(int *argc, char **argv) {
InteractionMode = MY_MENU_CAMERA;
TX = 1.1; TY = 0.8; TZ = -2.0;
XmouseDown = -1;
YmouseDown = -1;
XmouseCurrent = XmousePrev = -1;
YmouseCurrent = YmousePrev = -1;
DX = DY = 0;
KeybModifiers = 0;
} /* myInitData() */
/***************************************************************/
/*********************** MOUSE CALLBACKS ***********************/
/***************************************************************/
/* ------------------------------------------------------------------------ */
/* Mouse Button UP/DOWN or DOWN/UP transition only */
/* ------------------------------------------------------------------------ */
void myButton(int button, int state, int x, int y) {
XmouseDown = x;
YmouseDown = WindHeight - y - 1; /* Invert to right-handed system */
/* This permits detection of left, middle, left+middle */
if (state == GLUT_DOWN)
mouseButtons |= button;
else
mouseButtons &= (~(button));
/* bitmask with GLUT_ACTIVE_SHIFT, GLUT_ACTIVE_CTRL, GLUT_ACTIVE_ALT */
KeybModifiers = glutGetModifiers();
if (button == GLUT_LEFT_BUTTON || button == GLUT_MIDDLE_BUTTON) {
if (state == GLUT_DOWN) {
XmouseCurrent = XmousePrev = XmouseDown;
YmouseCurrent = YmousePrev = YmouseDown;
} else {
/* at button up, invalidate: */
XmouseCurrent = XmousePrev = XmouseDown = -1;
YmouseCurrent = YmousePrev = YmouseDown = -1;
KeybModifiers = 0;
}
DX = DY = 0;
}
glutPostRedisplay();
} /* myButton() */
/* ------------------------------------------------------------------------ */
/* Mouse motion WHILE BUTTON DOWN */
/* COMPLAINS if you call glutGetModifiers() here!! */
/* ------------------------------------------------------------------------ */
void myMotion(int x, int y) {
float rMDeltaX = 0.0;
float rMDeltaY = 0.0;
XmouseCurrent = x;
YmouseCurrent = WindHeight - y - 1; /* Invert to right-handed system */
DX = XmouseCurrent - XmousePrev;
DY = YmouseCurrent - YmousePrev;
// printf("%d %d \n", DX, DY);
XmousePrev = XmouseCurrent;
YmousePrev = YmouseCurrent;
if(InteractionMode == MY_ROT_LIGHT){
rMDeltaX = DX * 0.05;
rMDeltaY = DY * 0.05;
myRollBall(rMDeltaX, rMDeltaY, gRotationMatrix);
}
glutPostRedisplay();
} /* myMotion(int x, int y) */
/* ------------------------------------------------------------------------ */
/* Handle Keyboard */
/* ------------------------------------------------------------------------ */
void myKeyboard(unsigned char key, int x, int y) {
/* Option: To force all lower case */
if (key >= 'A' && key <= 'Z') key = (key-'A') + 'a';
switch (key) {
case 'h':
if( help_display == GL_TRUE ){
help_display = GL_FALSE ;
}
else {
help_display = GL_TRUE ;
}
fprintf(stderr,"Help: \n"
"ESC or q: quit \n"
"t: toggle texture\n");
break;
case 'q' :
case 27 : /* 27 -> ESC */
fprintf(stderr,"Normal Exit.\n");
exit(EXIT_SUCCESS);
break;
case 'O':
case 'o':
if(key_f1){
key_f1 =GL_FALSE;
glDisable(GL_LIGHT0);
} else {
key_f1 = GL_TRUE;
glEnable(GL_LIGHT0);
}
break;
case 'P':
case 'p':
if(key_f2){
key_f2 =GL_FALSE;
glDisable(GL_LIGHT1);
} else {
key_f2 = GL_TRUE;
glEnable(GL_LIGHT1);
}
break;
case 'W':
case 'w':
TY += 0.05;
break;
case 'S':
case 's':
if(TY <= 0.5){
TY = 0.5;
}else{
TY -= 0.05;
}
break;
case 'A':
case 'a':
if( rot_angle >= 360.0 ){
rot_angle = 0.0 ;
}
rot_angle += 5.0;
break;
case 'D':
case 'd':
if(rot_angle <= 0.0){
rot_angle = 360.0 ;
}
rot_angle -= 5.0;
break;
case 'G':
case 'g':
pov = 1;
break;
case 'V':
case 'v':
pov = 2;
break;
case 'B':
case 'b':
pov = 3;
break;
default: fprintf(stderr,"Unhandled key: %c [%d] \n",key,key);
}
glutPostRedisplay();
} /* myKeyboard() */
/* -------------------------------------------------------------- */
/* myMenus() - callback for GLUT menus */
/* -------------------------------------------------------------- */
void myMenus (int value) {
switch(value) {
case MY_MENU_RESET:
/* reset things here */
break;
case MY_MENU_CAMERA:
InteractionMode = MY_MENU_CAMERA;
break;
case MY_MENU_LIGHT:
InteractionMode = MY_MENU_LIGHT;
break;
case MY_MENU_OBJECT:
InteractionMode = MY_MENU_OBJECT;
break;
case MY_ROT_LIGHT:
InteractionMode = MY_ROT_LIGHT;
break;
case MY_MENU_PROJECT:
InteractionMode = MY_MENU_PROJECT;
break;
case MY_MENU_EXIT:
exit(0);
break;
default:
// fprintf(stderr,"unknown menu entry");
;
} /* switch () */
glutPostRedisplay(); /* make sure we Display according to changes */
} /* myMenus() */
/* -------------------------------------------------------------- */
/* initialize GLUT menus */
/* -------------------------------------------------------------- */
void myInitMenus (void) {
glutCreateMenu(myMenus);
glutAddMenuEntry("Move Camera", MY_MENU_CAMERA);
glutAddMenuEntry("Move Light", MY_MENU_LIGHT);
glutAddMenuEntry("Rotate Light", MY_ROT_LIGHT);
glutAddMenuEntry("Move Object", MY_MENU_OBJECT);
glutAddMenuEntry(" ", -3);
glutAddMenuEntry("Exit", MY_MENU_EXIT);
glutAttachMenu(GLUT_RIGHT_BUTTON);
} /* myInitMenus() */
/***************************************************************/
/************************** INIT GL ****************************/
/***************************************************************/
void myInitGL (void) {
int i;
GLfloat light_ambient0[] = {0.1,0.1,0.1, 1.0};
GLfloat light_diffuse0[] = {1.0,1.0,1.0, 1.0};
GLfloat light_specular0[] = {1.0,1.0,1.0, 1.0};
GLfloat light_ambient1[] = {0.1,0.1,0.0, 1.0};
GLfloat light_diffuse1[] = {.5,.5,0.0, 1.0};
GLfloat light_specular1[] = {0.5,0.5,0.0, 1.0};
/* projection pipeline initialization */
FOVangle = 90.0;
FOVratio = 1.0;
ClipNear = 0.1;
ClipFar = 1000.0;
XCamera = YCamera = 0.7;
ZCamera = 5.0;
WindWidth = glutGet(GLUT_WINDOW_WIDTH);
WindHeight = glutGet(GLUT_WINDOW_HEIGHT);
glViewport(0, 0, WindWidth, WindHeight);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
FOVratio = (float)WindWidth / (float)WindHeight; /* keep viewed x/y ratio == 1 */
/* instead of glFrustum(-1.0*ratio, 1.0*ratio, -1.0,1.0, FLength, 25.0); */
gluPerspective(FOVangle, FOVratio, ClipNear, ClipFar);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
/* Colors, Lighting, Material initialization */
glClearColor( 0.4f, 0.6f, 0.5f, 1.0f);
glPointSize(1); glEnable(GL_POINT_SMOOTH);
glLineWidth(1); glEnable(GL_LINE_SMOOTH);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
/* we do **not** want model materials to follow the current GL color: */
glDisable(GL_COLOR_MATERIAL);
glShadeModel(GL_SMOOTH); /* or GL_FLAT */
glEnable(GL_NORMALIZE);
glDepthFunc(GL_LESS);
glEnable(GL_DEPTH_TEST);
/* light0 is the spot light */
glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient0);
glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse0);
glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular0);
LightPos0[0] = -1.0; LightPos0[1] = 2.0;
LightPos0[2] = 0.5; LightPos0[3] = 1.0;
glLightfv(GL_LIGHT1, GL_AMBIENT, light_ambient1);
glLightfv(GL_LIGHT1, GL_DIFFUSE, light_diffuse1);
glLightfv(GL_LIGHT1, GL_SPECULAR, light_specular1);
LightPos1[0] = 0.0; LightPos1[1] = 20.0;
LightPos1[2] = 0.0; LightPos1[3] = 1.0;
glLightfv(GL_LIGHT0, GL_POSITION, LightPos0);
glLightfv(GL_LIGHT1, GL_POSITION, LightPos1);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_LIGHT1);
glutTimerFunc(25, timerCallback, 0);
i = ReadPPM("data/temp.ppm", &TMap);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glBindTexture(GL_TEXTURE_2D, 1);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, TMap.texc, TMap.texr,
0, GL_RGB, GL_UNSIGNED_BYTE, TMap.texture);
} /* myInitGL() */
/***************************************************************/
/********************** DRAW FUNCTIONS *************************/
/***************************************************************/
void myDrawTeapot(GLdouble size) {
GLfloat materialDiffuse[] = {0.7, 0.4, 0.2, 1.0};
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, materialDiffuse);
if (TextureOn==GL_TRUE) {
glEnable(GL_TEXTURE_2D);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBindTexture(GL_TEXTURE_2D, TextureName);
glFrontFace(GL_CW);
glutSolidTeapot(size);
glFrontFace(GL_CCW);
glDisable(GL_TEXTURE_2D);
} else {
glFrontFace(GL_CW);
glutSolidTeapot(size);
glFrontFace(GL_CCW);
}
} /* myDrawTeapot() */
void drawmodel(void){
if(!pmodel){
pmodel = glmReadOBJ("data/f-16.obj");
if(!pmodel) exit(0);
glmUnitize(pmodel);
glmFacetNormals(pmodel);
glmVertexNormals(pmodel, 90.0);
}
glmDraw(pmodel, GLM_SMOOTH | GLM_MATERIAL);
}
void drawscene(void){
if(!smodel){
smodel = glmReadOBJ("data/scene.obj");
if(!smodel) exit(0);
glmUnitize(smodel);
glmFacetNormals(smodel);
glmVertexNormals(smodel, 90.0);
}
glmDraw(smodel,GLM_SMOOTH);
}
void drawcircle(float radius){
int i;
float vert[4];
float texC[2];
float angle = 2.0* 3.14/100;
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D,1);
glTexEnvi(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_REPLACE);
glBegin(GL_TRIANGLE_FAN);
texC[0] = 0.5;
texC[1] = 0.5;
glTexCoord2fv(texC);
vert[0] = 0.0;
vert[1] = 0.0;
vert[2] = 0.0;
vert[3] = 1.0;
glVertex4fv(vert);
for(i = 0; i < 100; i++){
texC[0] = (cos(angle*i) + 1.0)/2;
texC[1] = (sin(angle*i) + 1.0)/2;
glTexCoord2fv(texC);
vert[0] = sin(angle*i) * radius;
vert[1] = cos(angle*i) * radius;
vert[2] = 0.0;
vert[3] = 1.0;
glVertex4fv(vert);
}
texC[0] = 1.0;
texC[1] = 0.5;
glTexCoord2fv(texC);
vert[0] = 0.0;
vert[1] = radius;
vert[2] = 0.0;
vert[3] = 1.0;
glVertex4fv(vert);
glEnd();
glDisable(GL_TEXTURE_2D);
}
void vec_mat_mult( GLfloat M[], GLfloat vec[], GLfloat out_vec[]){
out_vec[0] = M[0]*vec[0] + M[4]*vec[1] + M[8]*vec[2] + M[12]*vec[3] ;
out_vec[1] = M[1]*vec[0] + M[5]*vec[1] + M[9]*vec[2] + M[13]*vec[3] ;
out_vec[2] = M[2]*vec[0] + M[6]*vec[1] + M[10]*vec[2] + M[14]*vec[3] ;
out_vec[3] = M[3]*vec[0] + M[7]*vec[1] + M[11]*vec[2] + M[15]*vec[3] ;
return;
}
void mat_cross_prod( GLfloat M[], GLfloat N[], GLfloat R[]){
int i, j, indx;
float out_vec[4] ;
for(j=0; j<4; j++){
vec_mat_mult(M, &N[j*4], out_vec);
for(i=0; i<4; i++){
indx = (i * 4)+j;
R[indx] = out_vec[i] ;
}
}
return ;
}
void vec_cross_prod( float vec1[], float vec2[], float out_vec[] ){
out_vec[0] = vec1[1]*vec2[2] - vec1[2]*vec2[1];
out_vec[1] = vec1[2]*vec2[0] - vec1[0]*vec2[2] ;
out_vec[2] = vec1[0]*vec2[1] - vec1[1]*vec2[0];
return ;
}
void normalize( float vec[] ){
float length ;
length = sqrt( vec[0]*vec[0] + vec[1]*vec[1] + vec[2]*vec[2] ) ;
vec[0] = vec[0]/length ;
vec[1] = vec[1]/length ;
vec[2] = vec[2]/length ;
return ;
}
void pos_nose_camera(void){
GLfloat M[16] ;
GLfloat start_pos[] = {0, 0, 0, 1 } ;
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glRotatef(rot_angle, 0, 1, 0);
glTranslatef( TX, TY, TZ) ;
glGetFloatv(GL_MODELVIEW_MATRIX, M );
vec_mat_mult( M, start_pos, nose_camera.pos );
glPopMatrix();
glPushMatrix();
glRotatef(rot_angle, 0, 1, 0);
glGetFloatv(GL_MODELVIEW_MATRIX, M );
start_pos[0] = nose_camera.look_at[0];
start_pos[1] = nose_camera.look_at[1];
start_pos[2] = nose_camera.look_at[2];
start_pos[3] = nose_camera.look_at[3];
vec_mat_mult( M, start_pos, nose_camera.look_at );
glPopMatrix();
return ;
}
void output(int x, int y, char *string)
{
int len, i;
glRasterPos2f(x, y);
len = (int) strlen(string);
for (i = 0; i < len; i++)
{
glutBitmapCharacter(GLUT_BITMAP_HELVETICA_18, string[i]);
}
}
void draw_scene(){
/* coordinate system origin - unit vectors
glDisable(GL_LIGHTING);
glLineWidth(2.0);
glBegin(GL_LINES); glColor3f(1.0,0.0,0.0);
glVertex3f(0.0,0.0,0.0); glVertex3f(1.0,0.0,0.0); glEnd();
glBegin(GL_LINES); glColor3f(0.0,1.0,0.0);
glVertex3f(0.0,0.0,0.0); glVertex3f(0.0,1.0,0.0); glEnd();
glBegin(GL_LINES); glColor3f(0.0,0.0,1.0);
glVertex3f(0.0,0.0,0.0); glVertex3f(0.0,0.0,1.0); glEnd();
glEnable(GL_LIGHTING);
*/
/* lights positioning */
if (InteractionMode == MY_MENU_LIGHT) {
/* move light */
if ((KeybModifiers & GLUT_ACTIVE_SHIFT) == 0) {
LightPos0[0] = LightPos0[0] + 0.1*(float)DX;
LightPos0[1] = LightPos0[1] + 0.1*(float)DY;
} else {
LightPos0[0] = LightPos0[0] + 0.1*(float)DX;
LightPos0[2] = LightPos0[2] + 0.1*(float)DY;
}
}
glDisable(GL_LIGHTING);
glPushMatrix();
if (InteractionMode == MY_ROT_LIGHT)
{
glMultMatrixf(gRotationMatrix);
glLightfv(GL_LIGHT0, GL_POSITION, LightPos0);
}
/* draw a little cube to mark the light's position: */
glTranslatef(LightPos0[0],LightPos0[1],LightPos0[2]);
glLightfv(GL_LIGHT0, GL_POSITION, LightPos0);
glColor3f(1.0,1.0,1.0);
glutSolidSphere(0.1, 50, 50);
glPopMatrix();
glEnable(GL_LIGHTING);
/* now draw the sun */
glDisable(GL_LIGHTING);
glPushMatrix();
glMultMatrixf(sunMatrix);
glTranslatef(LightPos1[0],LightPos1[1],LightPos1[2]);
glLightfv(GL_LIGHT1, GL_POSITION, LightPos1);
glColor3f(1.0,1.0,0.0);
glutSolidSphere(0.75, 50, 50);
glPopMatrix();
glEnable(GL_LIGHTING);
/* draw the aircraft */
glPushMatrix();
glMultMatrixf(planeMatrix);
glTranslatef(plane_pos[0],plane_pos[1],plane_pos[2]);
glRotatef(rot_angle, 0, 1, 0);
glScalef(0.35, 0.35, 0.35);
drawmodel();
glPopMatrix();
/* draw the scene */
glPushMatrix();
glScalef(15.0, 8.5, 15.5);
drawscene();
glPopMatrix();
/* draw textured circle */
glPushMatrix();
glTranslatef(-8, -1.35, -0.75);
glRotatef(90, -1, 0, 0);
drawcircle(5.5);
glPopMatrix();
return ;
}
static float eyesep = 0.05 ;
static float near = 10 ;
static float far = 2000 ;
static float focallength = 100 ;
static float aperture = 60.0 ;
/* ------------------------------------------------------------------------ */
void myDisplay(void) {
double ratio,radians,wd2,ndfl;
double left,right,top,bottom;
int wind_hi, wind_wid ;
float r[4], vec1[4], vec2[4] ;
wind_hi = glutGet(GLUT_WINDOW_HEIGHT) ;
wind_wid = glutGet(GLUT_WINDOW_WIDTH) ;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
/* Misc stuff needed for the frustum */
ratio = (double)wind_wid / (double)wind_hi;
radians = DEGTORAD * aperture / 2;
wd2 = near * tan(radians);
ndfl = near / focallength;
top = wd2;
bottom = - wd2;
if(pov == 1 )
{
vec1[0] = 0 ;
vec1[1] = 0 ;
vec1[2] = -1;
vec2[0] = 0 ;
vec2[1] = 1 ;
vec2[2] = 0;
vec_cross_prod(vec1,vec2,r);
}
else if(pov == 3)
{
vec1[0] = nose_camera.pos[0] ;
vec1[1] = 0 ;
vec1[2] = nose_camera.pos[2];
vec2[0] = 0 ;
vec2[1] = 0 ;
vec2[2] = -1;
vec_cross_prod(vec1,vec2,r);
}
else
{
vec1[0] = nose_camera.look_at[0] ;
vec1[1] = nose_camera.look_at[1] ;
vec1[2] = nose_camera.look_at[2];
vec2[0] = 0 ;
vec2[1] = 1 ;
vec2[2] = 0;
vec_cross_prod(vec1,vec2,r);
}
normalize(r);
r[0] *= eyesep / 2.0;
r[1] *= eyesep / 2.0;
r[2] *= eyesep / 2.0;
if (stereo == DUALSTEREO)
glViewport(wind_wid/2,0,wind_wid/2,wind_hi);
else
glViewport(0,0,wind_wid,wind_hi);
glMatrixMode(GL_MODELVIEW);
if (stereo == DUALSTEREO) {
glDrawBuffer(GL_BACK);
}else{
glDrawBuffer(GL_BACK_RIGHT);
}
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
if(pov == 1 )
{
gluLookAt(0+r[0], 8+r[1], 0+r[2], 0+r[0], 0+r[1], -1+r[2], 0, 1, 0);
}
else if(pov == 3)
{
gluLookAt(nose_camera.pos[0]+r[0], 8+r[1], nose_camera.pos[2]+r[2],
nose_camera.pos[0]+r[0], 0+r[1], nose_camera.pos[2]+r[2],
0, 0, -1);
}
else
{
gluLookAt( nose_camera.pos[0]+r[0], nose_camera.pos[1]+r[1], nose_camera.pos[2]+r[2],
nose_camera.look_at[0]+r[0], nose_camera.look_at[1]+r[1], nose_camera.look_at[2]+r[2],
0,1,0 );
}
draw_scene() ;
//glMatrixMode(GL_PROJECTION);
//glPopMatrix();
//glMatrixMode(GL_PROJECTION);
//glPushMatrix();
//glLoadIdentity();
//left = - ratio * wd2;
//right = ratio * wd2;
//left = - ratio * wd2 + 0.5 * eyesep * ndfl;
//right = ratio * wd2 + 0.5 * eyesep * ndfl;
//glFrustum(left,right,bottom,top,near,far);
if (stereo == DUALSTEREO)
glViewport(0,0,wind_wid/2,wind_hi);
else
glViewport(0,0,wind_wid,wind_hi);
glMatrixMode(GL_MODELVIEW);
if (stereo == DUALSTEREO) {
glDrawBuffer(GL_BACK);
}else{
glDrawBuffer(GL_BACK_LEFT);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
glLoadIdentity();
if(pov == 1 )
{
gluLookAt(0-r[0], 8-r[1], 0-r[2], 0-r[0], 0-r[1], -1-r[2], 0, 1, 0);
}
else if(pov == 3)
{
gluLookAt(nose_camera.pos[0]-r[0], 8-r[1], nose_camera.pos[2]-r[2],
nose_camera.pos[0]-r[0], 0-r[1], nose_camera.pos[2]-r[2],
0, 0, -1);
}
else
{
gluLookAt( nose_camera.pos[0]-r[0], nose_camera.pos[1]-r[1], nose_camera.pos[2]-r[2],
nose_camera.look_at[0]-r[0], nose_camera.look_at[1]-r[1], nose_camera.look_at[2]-r[2],
0,1,0 );
}
draw_scene() ;
//glMatrixMode(GL_PROJECTION);
//glPopMatrix();
glutSwapBuffers();
} /* myDisplay() */
/***************************************************************/
/*********************** GLUT FUNCTIONS ************************/
/***************************************************************/
/* ------------------------------------------------------------------------ */
void myReshape(int w, int h) {
w = MY_MAX(w,128);
h = MY_MAX(h,128);
WindHeight = h;
WindWidth = w;
glutReshapeWindow(w,h);
glViewport(0,0,w,h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
FOVratio = (float)w / (float)h; /* keep world coord x/y ratio == 1 */
gluPerspective(FOVangle, FOVratio, ClipNear, ClipFar);
glMatrixMode(GL_MODELVIEW);
} /* myReshape() */
/* ------------------------------------------------------------------------ */
void myVisibility(int state) {
/* ------------------------------------------------------------------------ */
if (state == GLUT_VISIBLE){
glutPostRedisplay();
}
} /* myVisibility() */
void myRollBall (GLfloat pDeltaX, GLfloat pDeltaY, GLfloat *pModelMatrix ) {
GLfloat rotateR = sqrt(pDeltaX*pDeltaX + pDeltaY*pDeltaY);
/* only rotate when there is a non-zero angle! */
if (rotateR > 0.01) {
normal[0] = -pDeltaY/rotateR;
normal[1] = pDeltaX/rotateR;
float theta = atan2(pDeltaY, pDeltaX);
theta = rotateR ;//theta*180.0/M_PI;
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glRotatef(theta, normal[0], normal[1], normal[2]);
glMultMatrixf(pModelMatrix);
glGetFloatv(GL_MODELVIEW_MATRIX, pModelMatrix);
}
glutPostRedisplay();
} /* myRollBall() */