opengl纹理glTexCoord2f工作不正常
我是opengl新手。我对glTexCoord2f很困惑。我不知道如何提供坐标。我只知道坐标应该是（0,0）（0,1）（1,0）和（1,1）。当我在平面上提供纹理（此处平面用于门）时，它无法正确显示bmp图像。我尝试过随机更改坐标，但图像的形状会发生变化，但它无法垂直显示图像。显示图像的坐标是多少（一扇直的垂直门） 我的完整代码opengl纹理glTexCoord2f工作不正常,opengl,glut,Opengl,Glut,我是opengl新手。我对glTexCoord2f很困惑。我不知道如何提供坐标。我只知道坐标应该是（0,0）（0,1）（1,0）和（1,1）。当我在平面上提供纹理（此处平面用于门）时，它无法正确显示bmp图像。我尝试过随机更改坐标，但图像的形状会发生变化，但它无法垂直显示图像。显示图像的坐标是多少（一扇直的垂直门） 我的完整代码 #include<stdio.h> #include<stdlib.h> #include<math.h>
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#include<windows.h>
#include<GL/glut.h>
double cameraAngle;
double move_X, move_Y, move_Z;
int canDrawGrid, canDrawAxis,canDrawBase;
double cameraRadius, cameraHeight, cameraAngleDelta;
int num_texture = -1;
GLuint grassimg,md1img,brick_d123,dome_top,dome_t_d,dome_t_d_2,floorimg,sideimg,main_door;
int LoadBitmapImage(char *filename)
{
int i, j=0;
FILE *l_file;
unsigned char *l_texture;
BITMAPFILEHEADER fileheader;
BITMAPINFOHEADER infoheader;
RGBTRIPLE rgb;
num_texture++;
if( (l_file = fopen(filename, "rb"))==NULL) return (-1);
fread(&fileheader, sizeof(fileheader), 1, l_file);
fseek(l_file, sizeof(fileheader), SEEK_SET);
fread(&infoheader, sizeof(infoheader), 1, l_file);
l_texture = (byte *) malloc(infoheader.biWidth * infoheader.biHeight * 4);
memset(l_texture, 0, infoheader.biWidth * infoheader.biHeight * 4);
for (i=0; i < infoheader.biWidth*infoheader.biHeight; i++)
{
fread(&rgb, sizeof(rgb), 1, l_file);
l_texture[j+0] = rgb.rgbtRed;
l_texture[j+1] = rgb.rgbtGreen;
l_texture[j+2] = rgb.rgbtBlue;
l_texture[j+3] = 255;
j += 4;
}
fclose(l_file);
glBindTexture(GL_TEXTURE_2D, num_texture);
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_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
// glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexImage2D(GL_TEXTURE_2D, 0, 4, infoheader.biWidth, infoheader.biHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, l_texture);
gluBuild2DMipmaps(GL_TEXTURE_2D, 4, infoheader.biWidth, infoheader.biHeight, GL_RGBA, GL_UNSIGNED_BYTE, l_texture);
free(l_texture);
return (num_texture);
}
void loadImage()
{
grassimg = LoadBitmapImage("image/brick.bmp");
brick_d123 = LoadBitmapImage("image/brick_d123.bmp");
md1img = LoadBitmapImage("image/m_d_1.bmp");
dome_top = LoadBitmapImage("image/dome_top.bmp");
dome_t_d = LoadBitmapImage("image/dome_t_d.bmp");
dome_t_d_2 = LoadBitmapImage("image/dome_t_d_2.bmp");
floorimg = LoadBitmapImage("image/floor.bmp");
sideimg = LoadBitmapImage("image/side_1.bmp");
main_door = LoadBitmapImage("image/main_door.bmp");
printf("Load successful");
}
void choto_gombuj(double tx,double ty, double tz,double deg,double axisX,double axisY,double axisZ,double sx,double sy, double sz){
glPushMatrix();{
glTranslatef(tx,ty,tz);
glRotatef(deg,axisX,axisY,axisZ);
glScalef(sx,sx,sz);
//CG_base_cyclindeer
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, brick_d123);
gluCylinder(obj,190,190,60,20,20);
}
glDisable(GL_TEXTURE_2D);
//CG_base_base_dakna
glColor3f(0,0,0);
glPushMatrix();{
glTranslatef(0,0,59);
glutSolidCone(189,1,20,20);
}glPopMatrix();
//CG_Cylinder_pillar_8
glPushMatrix();{
glTranslatef(120,120,59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
gluCylinder(obj,12,12,220,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(170,0,59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
gluCylinder(obj,12,12,220,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(120,-120,59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
gluCylinder(obj,12,12,220,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(0,-170,59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
gluCylinder(obj,12,12,220,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(-120,-120,59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
gluCylinder(obj,12,12,220,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(-170,0,59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
gluCylinder(obj,12,12,220,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(-120,120,59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
gluCylinder(obj,12,12,220,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(0,170,59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
gluCylinder(obj,12,12,220,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(0,0,220+59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, md1img);
gluCylinder(obj,220,0,60,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
// main_dome
glPushMatrix();{
glColor3f(1,1,1);
glTranslatef(0,0,440);
glPushMatrix();{
glTranslatef(0,0,150);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, dome_t_d);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluCylinder(obj,160,0,130,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
double equ[4];
equ[0]=0;
equ[1]=0;
equ[2]=1;
equ[3]=150;
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, dome_top);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
glClipPlane(GL_CLIP_PLANE0,equ);
glEnable(GL_CLIP_PLANE0);{
gluSphere(obj,220,20,20);
}glDisable(GL_CLIP_PLANE0);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
//dome_top_balls
glPushMatrix();{
glTranslatef(0,0,740);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, dome_t_d_2);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluSphere(obj,40,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(0,0,810);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, dome_t_d_2);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluSphere(obj,35,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(0,0,865);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, dome_t_d_2);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluSphere(obj,30,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(0,0,910);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, dome_t_d_2);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluSphere(obj,25,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
}glPopMatrix();
}
void minar(double tx,double ty, double tz,double deg,double axisX,double axisY,double axisZ){
glPushMatrix();{
glTranslatef(tx,ty,tz);
glRotatef(deg,axisX,axisY,axisZ);
//Minar_base
GLUquadricObj *obj = gluNewQuadric();
glColor3f(0,0,0);
glPushMatrix();{
gluCylinder(obj,150,140,240,20,20);
}glPopMatrix();
//Minar_base_base_dakna
glColor3f(1,0,0);
glPushMatrix();{
glTranslatef(0,0,240);
glutSolidCone(142,1,20,20);
}glPopMatrix();
//Minar_main_pillar
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluCylinder(obj,105,70,1500,20,20);
}
glDisable(GL_TEXTURE_2D);
//Minar_design_3_plate_1
glPushMatrix();{
glTranslatef(0,0,600);
glRotatef(180,0,1,0);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, md1img);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluCylinder(obj,135,0,100,20,20);
}
glDisable(GL_TEXTURE_2D);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, brick_d123);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluCylinder(obj,135,0,1,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
////Minar_design_3_plate_2
glPushMatrix();{
glTranslatef(0,0,1050);
glColor3f(1,1,1);
glRotatef(180,0,1,0);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, md1img);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluCylinder(obj,120,0,100,20,20);
}
glDisable(GL_TEXTURE_2D);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, brick_d123);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluCylinder(obj,120,0,1,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
////Minar__design_3_plate_3
glPushMatrix();{
glTranslatef(0,0,1500);
glColor3f(1,1,1);
glRotatef(180,0,1,0);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, md1img);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluCylinder(obj,105,0,100,20,20);
}
glDisable(GL_TEXTURE_2D);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, brick_d123);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluCylinder(obj,105,0,1,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
choto_gombuj(0,0,1500,0,0,0,0,0.4,0.4,0.4);
}glPopMatrix();
}
void display(){
//codes for Models, Camera
//clear the display
//glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glClearColor(0,0,0,0); //color black
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //clear buffers to preset values
/***************************
/ set-up camera (view) here
****************************/
//load the correct matrix -- MODEL-VIEW matrix
glMatrixMode(GL_MODELVIEW); //specify which matrix is the current matrix
//initialize the matrix
glLoadIdentity(); //replace the current matrix with the identity matrix [Diagonals have 1, others have 0]
//now give three info
//1. where is the camera (viewer)?
//2. where is the camera looking?
//3. Which direction is the camera's UP direction?
//gluLookAt(0,-150,20, 0,0,0, 0,0,1);
gluLookAt(cameraRadius*sin(cameraAngle), -cameraRadius*cos(cameraAngle), cameraHeight, 0,0,0, 0,0,1);
//again select MODEL-VIEW
glMatrixMode(GL_MODELVIEW);
/**************************************************
/ Grid and axes Lines(You can remove them if u want)
***************************************************/
// draw the three major AXES
if(canDrawAxis==1){
glBegin(GL_LINES);
//X axis
glColor3f(0, 1, 0); //100% Green
glVertex3f(-4000, 0, 0);
glVertex3f( 4000, 0, 0);
//Y axis
glColor3f(0, 0, 1); //100% Blue
glVertex3f(0, -4000, 0); // intentionally extended to -150 to 150, no big deal
glVertex3f(0, 4000, 0);
//Z axis
glColor3f(1, 1, 1); //100% White
glVertex3f( 0, 0, -4000);
glVertex3f(0, 0, 4000);
glEnd();
}
if(canDrawGrid == 1){
//some gridlines along the field
int i;
glColor3f(0.5, 0.5, 0.5); //grey
glBegin(GL_LINES);
for(i=-160;i<=160;i++){
if(i==0)
continue; //SKIP the MAIN axes
//lines parallel to Y-axis
glVertex3f(i*20, -3600, 0);
glVertex3f(i*20, 3600, 0);
//lines parallel to X-axis
glVertex3f(-3600, i*20, 0);
glVertex3f( 3600, i*20, 0);
}
glEnd();
}
/****************************
/ Add your objects from here
****************************/
if(canDrawBase == 1){
//base_floor
glColor3f(0,1,0);
glBegin(GL_QUADS);{
glVertex3f(-3600,3600,0);
glVertex3f(3600,3600,0);
glVertex3f(3600,-3600,0);
glVertex3f(-3600,-3600,0);
}glEnd();
}
//taj_base
glColor3f(1,1,1);
//right_base_wall
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, sideimg);
glBegin(GL_QUADS);{
glColor3f(1,1,1);
glTexCoord2f(0,1);
glVertex3f(2000,2000,0);
glTexCoord2f(0,0);
glVertex3f(2000,-2000,0);
glTexCoord2f(1,0);
glVertex3f(2000,-2000,240);
glTexCoord2f(1,1);
glVertex3f(2000,2000,240);
}glEnd();
}
glDisable(GL_TEXTURE_2D);
glColor3f(1,1,1);
//left_base_wall
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, sideimg);
glBegin(GL_QUADS);{
glColor3f(1,1,1);
glTexCoord2f(0,1);
glVertex3f(-2000,2000,0);
glTexCoord2f(0,0);
glVertex3f(-2000,-2000,0);
glTexCoord2f(1,0);
glVertex3f(-2000,-2000,240);
glTexCoord2f(1,1);
glVertex3f(-2000,2000,240);
}glEnd();
}
glDisable(GL_TEXTURE_2D);
glColor3f(1,1,1);
//back_base_wall
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, sideimg);
glBegin(GL_QUADS);{
glColor3f(1,1,1);
glTexCoord2f(0,1);
glVertex3f(-2000,2000,0);
glTexCoord2f(0,0);
glVertex3f(2000,2000,0);
glTexCoord2f(1,0);
glVertex3f(2000,2000,240);
glTexCoord2f(1,1);
glVertex3f(-2000,2000,240);
}glEnd();
}
glDisable(GL_TEXTURE_2D);
glColor3f(1,1,1);
//font__base_wall
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, sideimg);
glBegin(GL_QUADS);{
glColor3f(1,1,1);
glTexCoord2f(0,1);
glVertex3f(-2000,-2000,0);
glTexCoord2f(0,0);
glVertex3f(2000,-2000,0);
glTexCoord2f(1,0);
glVertex3f(2000,-2000,240);
glTexCoord2f(1,1);
glVertex3f(-2000,-2000,240);
}glEnd();
}
glDisable(GL_TEXTURE_2D);
glColor3f(1,1,1);
//font_top_wall
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, floorimg);
glBegin(GL_QUADS);{
glColor3f(1,1,1);
glTexCoord2f(0,1);
glVertex3f(-2000,2000,240);
glTexCoord2f(0,0);
glVertex3f(2000,2000,240);
glTexCoord2f(1,0);
glVertex3f(2000,-2000,240);
glTexCoord2f(1,1);
glVertex3f(-2000,-2000,240);
}glEnd();
}
glDisable(GL_TEXTURE_2D);
/*//taj_base_shiri_cube
glColor3f(1,0,0);
glPushMatrix();{
glTranslatef(0,-2050,120);
//glRotatef(-16,1,0,0);
glScalef(500,100,240);
glutSolidCube(1);
}glPopMatrix();
*/
minar(-1950,-1950,0,0,0,0,0);
minar(1950,-1950,0,0,0,0,0);
minar(1950,1950,0,0,0,0,0);
minar(-1950,1950,0,0,0,0,0);
//taj_main_building
glColor3f(1,1,1);
glPushMatrix();{
glTranslatef(0,-1200,240);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, main_door);
glBegin(GL_QUADS);{
glTexCoord2f(0,0);
glVertex3f(-400,0,0);
glTexCoord2f(1,0);
glVertex3f(400,0,0);
glTexCoord2f(1,1);
glVertex3f(400,0,1000);
glTexCoord2f(1,1);
glVertex3f(-400,0,1000);
}glEnd();
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
//ADD this line in the end --- if you use double buffer (i.e. GL_DOUBLE)
glutSwapBuffers();
}
void animate(){
//codes for any changes in Models, Camera
//cameraAngle += cameraAngleDelta; // camera will rotate at 0.002 radians per frame.
//codes for any changes in Models
//MISSING SOMETHING? -- YES: add the following
glutPostRedisplay(); //this will call the display AGAIN
}
void init(){
//codes for initialization
loadImage();
cameraAngle = 0; //angle in radian
move_X = 0;
move_Y = 0;
move_Z = 0;
canDrawGrid = 1;
canDrawAxis = 1;
canDrawBase = 1;
cameraAngleDelta = .001;
cameraRadius = 4000;
cameraHeight = 500;
//clear the screen
glClearColor(0,0,0, 0);
/************************
/ set-up projection here
************************/
//load the PROJECTION matrix
glMatrixMode(GL_PROJECTION);
//initialize the matrix
glLoadIdentity();
/*
gluPerspective() — set up a perspective projection matrix
fovy - Specifies the field of view angle, in degrees, in the y direction.
aspect ratio - Specifies the aspect ratio that determines the field of view in the x direction. The aspect ratio is the ratio of x (width) to y (height).
zNear - Specifies the distance from the viewer to the near clipping plane (always positive).
zFar - Specifies the distance from the viewer to the far clipping plane (always positive).
*/
gluPerspective(70, 1, 0.1, 10000.0);
}
void keyboardListener(unsigned char key, int x,int y){
switch(key){
case '1':
move_X += 1;
break;
case '2':
move_X -= 1;
break;
case '3':
move_Y += 1;
break;
case '4':
move_Y -= 1;
break;
case '5':
move_Z += 1;
break;
case '6':
move_Z -= 1;
break;
case '8':
break;
case 'g':
canDrawGrid ^= 1;
break;
case 'h':
canDrawAxis ^= 1;
break;
case 'p':
break;
case 'z':
canDrawBase ^= 1;
break;
default:
break;
}
}
void specialKeyListener(int key, int x,int y){
switch(key){
case GLUT_KEY_DOWN: //down arrow key
cameraRadius += 40;
break;
case GLUT_KEY_UP: // up arrow key
if(cameraRadius > 40)
cameraRadius -= 40;
break;
case GLUT_KEY_RIGHT:
cameraAngle += 0.05;
break;
case GLUT_KEY_LEFT:
cameraAngle -= 0.05;
break;
case GLUT_KEY_PAGE_UP:
cameraHeight += 40;
break;
case GLUT_KEY_PAGE_DOWN:
cameraHeight -= 40;
break;
case GLUT_KEY_INSERT:
break;
case GLUT_KEY_HOME:
// cameraAngleDelta = 0.001;
break;
case GLUT_KEY_END:
// cameraAngleDelta = 0;
break;
default:
break;
}
}
void mouseListener(int button, int state, int x, int y){ //x, y is the x-y of the screen (2D)
switch(button){
case GLUT_LEFT_BUTTON:
if(state == GLUT_DOWN){ // 2 times?? in ONE click? -- solution is checking DOWN or UP
cameraAngleDelta = -cameraAngleDelta;
}
break;
case GLUT_RIGHT_BUTTON:
if(cameraRadius > 40)
cameraRadius -= 40;
break;
case GLUT_MIDDLE_BUTTON:
//........
break;
default:
break;
}
}
int main(int argc, char **argv){
glutInit(&argc,argv); //initialize the GLUT library
glutInitWindowSize(500, 500);
glutInitWindowPosition(100, 100);
/*
glutInitDisplayMode - inits display mode
GLUT_DOUBLE - allows for display on the double buffer window
GLUT_RGBA - shows color (Red, green, blue) and an alpha
GLUT_DEPTH - allows for depth buffer
*/
glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGB);
glutCreateWindow("Some Title");
init(); //codes for initialization
glEnable(GL_DEPTH_TEST); //enable Depth Testing
glutDisplayFunc(display); //display callback function
glutIdleFunc(animate); //what you want to do in the idle time (when no drawing is occuring)
glutKeyboardFunc(keyboardListener);
glutSpecialFunc(specialKeyListener);
glutMouseFunc(mouseListener);
glutMainLoop(); //The main loop of OpenGL
return 0;
}
#包括
#包括
#包括
#包括
#包括
双摄像机角度；
双动X，动Y，动Z；
int canDrawGrid、canDrawAxis、canDrawBase；
双摄像机，摄像机，摄像机三角洲；
int num_纹理=-1；
胶合草地、md1img、砖d123、穹顶、穹顶、穹顶、穹顶2、地板、侧面、大门；
int LoadBitmapImage（字符*文件名）
{
int i，j=0；
文件*l_文件；
无符号字符*l_纹理；
BITMAPFILEHEADER文件头；
BitMapInfo头信息头；
rgb三重rgb；
num_纹理++；
if（（l_file=fopen（filename，“rb”））==NULL）返回（-1）；
fread（&fileheader，sizeof（fileheader），1，l_文件）；
fseek（l_文件、sizeof（文件头）、SEEK_集）；
fread（&infoheader，sizeof（infoheader），1，l_文件）；
l_纹理=（字节*）malloc（infoheader.biWidth*infoheader.biHeight*4）；
memset（l_纹理，0，infoheader.biWidth*infoheader.biHeight*4）；
对于（i=0；i #include<stdio.h>
#include<stdlib.h>
#include<math.h>
#include<windows.h>
#include<GL/glut.h>
double cameraAngle;
double move_X, move_Y, move_Z;
int canDrawGrid, canDrawAxis,canDrawBase;
double cameraRadius, cameraHeight, cameraAngleDelta;
int num_texture = -1;
GLuint grassimg,md1img,brick_d123,dome_top,dome_t_d,dome_t_d_2,floorimg,sideimg,main_door;
int LoadBitmapImage(char *filename)
{
int i, j=0;
FILE *l_file;
unsigned char *l_texture;
BITMAPFILEHEADER fileheader;
BITMAPINFOHEADER infoheader;
RGBTRIPLE rgb;
num_texture++;
if( (l_file = fopen(filename, "rb"))==NULL) return (-1);
fread(&fileheader, sizeof(fileheader), 1, l_file);
fseek(l_file, sizeof(fileheader), SEEK_SET);
fread(&infoheader, sizeof(infoheader), 1, l_file);
l_texture = (byte *) malloc(infoheader.biWidth * infoheader.biHeight * 4);
memset(l_texture, 0, infoheader.biWidth * infoheader.biHeight * 4);
for (i=0; i < infoheader.biWidth*infoheader.biHeight; i++)
{
fread(&rgb, sizeof(rgb), 1, l_file);
l_texture[j+0] = rgb.rgbtRed;
l_texture[j+1] = rgb.rgbtGreen;
l_texture[j+2] = rgb.rgbtBlue;
l_texture[j+3] = 255;
j += 4;
}
fclose(l_file);
glBindTexture(GL_TEXTURE_2D, num_texture);
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_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
// glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexImage2D(GL_TEXTURE_2D, 0, 4, infoheader.biWidth, infoheader.biHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, l_texture);
gluBuild2DMipmaps(GL_TEXTURE_2D, 4, infoheader.biWidth, infoheader.biHeight, GL_RGBA, GL_UNSIGNED_BYTE, l_texture);
free(l_texture);
return (num_texture);
}
void loadImage()
{
grassimg = LoadBitmapImage("image/brick.bmp");
brick_d123 = LoadBitmapImage("image/brick_d123.bmp");
md1img = LoadBitmapImage("image/m_d_1.bmp");
dome_top = LoadBitmapImage("image/dome_top.bmp");
dome_t_d = LoadBitmapImage("image/dome_t_d.bmp");
dome_t_d_2 = LoadBitmapImage("image/dome_t_d_2.bmp");
floorimg = LoadBitmapImage("image/floor.bmp");
sideimg = LoadBitmapImage("image/side_1.bmp");
main_door = LoadBitmapImage("image/main_door.bmp");
printf("Load successful");
}
void choto_gombuj(double tx,double ty, double tz,double deg,double axisX,double axisY,double axisZ,double sx,double sy, double sz){
glPushMatrix();{
glTranslatef(tx,ty,tz);
glRotatef(deg,axisX,axisY,axisZ);
glScalef(sx,sx,sz);
//CG_base_cyclindeer
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, brick_d123);
gluCylinder(obj,190,190,60,20,20);
}
glDisable(GL_TEXTURE_2D);
//CG_base_base_dakna
glColor3f(0,0,0);
glPushMatrix();{
glTranslatef(0,0,59);
glutSolidCone(189,1,20,20);
}glPopMatrix();
//CG_Cylinder_pillar_8
glPushMatrix();{
glTranslatef(120,120,59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
gluCylinder(obj,12,12,220,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(170,0,59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
gluCylinder(obj,12,12,220,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(120,-120,59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
gluCylinder(obj,12,12,220,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(0,-170,59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
gluCylinder(obj,12,12,220,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(-120,-120,59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
gluCylinder(obj,12,12,220,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(-170,0,59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
gluCylinder(obj,12,12,220,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(-120,120,59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
gluCylinder(obj,12,12,220,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(0,170,59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
gluCylinder(obj,12,12,220,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(0,0,220+59);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, md1img);
gluCylinder(obj,220,0,60,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
// main_dome
glPushMatrix();{
glColor3f(1,1,1);
glTranslatef(0,0,440);
glPushMatrix();{
glTranslatef(0,0,150);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, dome_t_d);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluCylinder(obj,160,0,130,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
double equ[4];
equ[0]=0;
equ[1]=0;
equ[2]=1;
equ[3]=150;
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, dome_top);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
glClipPlane(GL_CLIP_PLANE0,equ);
glEnable(GL_CLIP_PLANE0);{
gluSphere(obj,220,20,20);
}glDisable(GL_CLIP_PLANE0);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
//dome_top_balls
glPushMatrix();{
glTranslatef(0,0,740);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, dome_t_d_2);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluSphere(obj,40,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(0,0,810);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, dome_t_d_2);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluSphere(obj,35,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(0,0,865);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, dome_t_d_2);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluSphere(obj,30,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
glPushMatrix();{
glTranslatef(0,0,910);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, dome_t_d_2);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluSphere(obj,25,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
}glPopMatrix();
}
void minar(double tx,double ty, double tz,double deg,double axisX,double axisY,double axisZ){
glPushMatrix();{
glTranslatef(tx,ty,tz);
glRotatef(deg,axisX,axisY,axisZ);
//Minar_base
GLUquadricObj *obj = gluNewQuadric();
glColor3f(0,0,0);
glPushMatrix();{
gluCylinder(obj,150,140,240,20,20);
}glPopMatrix();
//Minar_base_base_dakna
glColor3f(1,0,0);
glPushMatrix();{
glTranslatef(0,0,240);
glutSolidCone(142,1,20,20);
}glPopMatrix();
//Minar_main_pillar
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, grassimg);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluCylinder(obj,105,70,1500,20,20);
}
glDisable(GL_TEXTURE_2D);
//Minar_design_3_plate_1
glPushMatrix();{
glTranslatef(0,0,600);
glRotatef(180,0,1,0);
glColor3f(1,1,1);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, md1img);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluCylinder(obj,135,0,100,20,20);
}
glDisable(GL_TEXTURE_2D);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, brick_d123);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluCylinder(obj,135,0,1,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
////Minar_design_3_plate_2
glPushMatrix();{
glTranslatef(0,0,1050);
glColor3f(1,1,1);
glRotatef(180,0,1,0);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, md1img);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluCylinder(obj,120,0,100,20,20);
}
glDisable(GL_TEXTURE_2D);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, brick_d123);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluCylinder(obj,120,0,1,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
////Minar__design_3_plate_3
glPushMatrix();{
glTranslatef(0,0,1500);
glColor3f(1,1,1);
glRotatef(180,0,1,0);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, md1img);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluCylinder(obj,105,0,100,20,20);
}
glDisable(GL_TEXTURE_2D);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, brick_d123);
GLUquadricObj *obj = gluNewQuadric();
gluQuadricTexture(obj,GL_TRUE);
gluCylinder(obj,105,0,1,20,20);
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
choto_gombuj(0,0,1500,0,0,0,0,0.4,0.4,0.4);
}glPopMatrix();
}
void display(){
//codes for Models, Camera
//clear the display
//glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glClearColor(0,0,0,0); //color black
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //clear buffers to preset values
/***************************
/ set-up camera (view) here
****************************/
//load the correct matrix -- MODEL-VIEW matrix
glMatrixMode(GL_MODELVIEW); //specify which matrix is the current matrix
//initialize the matrix
glLoadIdentity(); //replace the current matrix with the identity matrix [Diagonals have 1, others have 0]
//now give three info
//1. where is the camera (viewer)?
//2. where is the camera looking?
//3. Which direction is the camera's UP direction?
//gluLookAt(0,-150,20, 0,0,0, 0,0,1);
gluLookAt(cameraRadius*sin(cameraAngle), -cameraRadius*cos(cameraAngle), cameraHeight, 0,0,0, 0,0,1);
//again select MODEL-VIEW
glMatrixMode(GL_MODELVIEW);
/**************************************************
/ Grid and axes Lines(You can remove them if u want)
***************************************************/
// draw the three major AXES
if(canDrawAxis==1){
glBegin(GL_LINES);
//X axis
glColor3f(0, 1, 0); //100% Green
glVertex3f(-4000, 0, 0);
glVertex3f( 4000, 0, 0);
//Y axis
glColor3f(0, 0, 1); //100% Blue
glVertex3f(0, -4000, 0); // intentionally extended to -150 to 150, no big deal
glVertex3f(0, 4000, 0);
//Z axis
glColor3f(1, 1, 1); //100% White
glVertex3f( 0, 0, -4000);
glVertex3f(0, 0, 4000);
glEnd();
}
if(canDrawGrid == 1){
//some gridlines along the field
int i;
glColor3f(0.5, 0.5, 0.5); //grey
glBegin(GL_LINES);
for(i=-160;i<=160;i++){
if(i==0)
continue; //SKIP the MAIN axes
//lines parallel to Y-axis
glVertex3f(i*20, -3600, 0);
glVertex3f(i*20, 3600, 0);
//lines parallel to X-axis
glVertex3f(-3600, i*20, 0);
glVertex3f( 3600, i*20, 0);
}
glEnd();
}
/****************************
/ Add your objects from here
****************************/
if(canDrawBase == 1){
//base_floor
glColor3f(0,1,0);
glBegin(GL_QUADS);{
glVertex3f(-3600,3600,0);
glVertex3f(3600,3600,0);
glVertex3f(3600,-3600,0);
glVertex3f(-3600,-3600,0);
}glEnd();
}
//taj_base
glColor3f(1,1,1);
//right_base_wall
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, sideimg);
glBegin(GL_QUADS);{
glColor3f(1,1,1);
glTexCoord2f(0,1);
glVertex3f(2000,2000,0);
glTexCoord2f(0,0);
glVertex3f(2000,-2000,0);
glTexCoord2f(1,0);
glVertex3f(2000,-2000,240);
glTexCoord2f(1,1);
glVertex3f(2000,2000,240);
}glEnd();
}
glDisable(GL_TEXTURE_2D);
glColor3f(1,1,1);
//left_base_wall
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, sideimg);
glBegin(GL_QUADS);{
glColor3f(1,1,1);
glTexCoord2f(0,1);
glVertex3f(-2000,2000,0);
glTexCoord2f(0,0);
glVertex3f(-2000,-2000,0);
glTexCoord2f(1,0);
glVertex3f(-2000,-2000,240);
glTexCoord2f(1,1);
glVertex3f(-2000,2000,240);
}glEnd();
}
glDisable(GL_TEXTURE_2D);
glColor3f(1,1,1);
//back_base_wall
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, sideimg);
glBegin(GL_QUADS);{
glColor3f(1,1,1);
glTexCoord2f(0,1);
glVertex3f(-2000,2000,0);
glTexCoord2f(0,0);
glVertex3f(2000,2000,0);
glTexCoord2f(1,0);
glVertex3f(2000,2000,240);
glTexCoord2f(1,1);
glVertex3f(-2000,2000,240);
}glEnd();
}
glDisable(GL_TEXTURE_2D);
glColor3f(1,1,1);
//font__base_wall
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, sideimg);
glBegin(GL_QUADS);{
glColor3f(1,1,1);
glTexCoord2f(0,1);
glVertex3f(-2000,-2000,0);
glTexCoord2f(0,0);
glVertex3f(2000,-2000,0);
glTexCoord2f(1,0);
glVertex3f(2000,-2000,240);
glTexCoord2f(1,1);
glVertex3f(-2000,-2000,240);
}glEnd();
}
glDisable(GL_TEXTURE_2D);
glColor3f(1,1,1);
//font_top_wall
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, floorimg);
glBegin(GL_QUADS);{
glColor3f(1,1,1);
glTexCoord2f(0,1);
glVertex3f(-2000,2000,240);
glTexCoord2f(0,0);
glVertex3f(2000,2000,240);
glTexCoord2f(1,0);
glVertex3f(2000,-2000,240);
glTexCoord2f(1,1);
glVertex3f(-2000,-2000,240);
}glEnd();
}
glDisable(GL_TEXTURE_2D);
/*//taj_base_shiri_cube
glColor3f(1,0,0);
glPushMatrix();{
glTranslatef(0,-2050,120);
//glRotatef(-16,1,0,0);
glScalef(500,100,240);
glutSolidCube(1);
}glPopMatrix();
*/
minar(-1950,-1950,0,0,0,0,0);
minar(1950,-1950,0,0,0,0,0);
minar(1950,1950,0,0,0,0,0);
minar(-1950,1950,0,0,0,0,0);
//taj_main_building
glColor3f(1,1,1);
glPushMatrix();{
glTranslatef(0,-1200,240);
glEnable(GL_TEXTURE_2D);{
glBindTexture(GL_TEXTURE_2D, main_door);
glBegin(GL_QUADS);{
glTexCoord2f(0,0);
glVertex3f(-400,0,0);
glTexCoord2f(1,0);
glVertex3f(400,0,0);
glTexCoord2f(1,1);
glVertex3f(400,0,1000);
glTexCoord2f(1,1);
glVertex3f(-400,0,1000);
}glEnd();
}
glDisable(GL_TEXTURE_2D);
}glPopMatrix();
//ADD this line in the end --- if you use double buffer (i.e. GL_DOUBLE)
glutSwapBuffers();
}
void animate(){
//codes for any changes in Models, Camera
//cameraAngle += cameraAngleDelta; // camera will rotate at 0.002 radians per frame.
//codes for any changes in Models
//MISSING SOMETHING? -- YES: add the following
glutPostRedisplay(); //this will call the display AGAIN
}
void init(){
//codes for initialization
loadImage();
cameraAngle = 0; //angle in radian
move_X = 0;
move_Y = 0;
move_Z = 0;
canDrawGrid = 1;
canDrawAxis = 1;
canDrawBase = 1;
cameraAngleDelta = .001;
cameraRadius = 4000;
cameraHeight = 500;
//clear the screen
glClearColor(0,0,0, 0);
/************************
/ set-up projection here
************************/
//load the PROJECTION matrix
glMatrixMode(GL_PROJECTION);
//initialize the matrix
glLoadIdentity();
/*
gluPerspective() — set up a perspective projection matrix
fovy - Specifies the field of view angle, in degrees, in the y direction.
aspect ratio - Specifies the aspect ratio that determines the field of view in the x direction. The aspect ratio is the ratio of x (width) to y (height).
zNear - Specifies the distance from the viewer to the near clipping plane (always positive).
zFar - Specifies the distance from the viewer to the far clipping plane (always positive).
*/
gluPerspective(70, 1, 0.1, 10000.0);
}
void keyboardListener(unsigned char key, int x,int y){
switch(key){
case '1':
move_X += 1;
break;
case '2':
move_X -= 1;
break;
case '3':
move_Y += 1;
break;
case '4':
move_Y -= 1;
break;
case '5':
move_Z += 1;
break;
case '6':
move_Z -= 1;
break;
case '8':
break;
case 'g':
canDrawGrid ^= 1;
break;
case 'h':
canDrawAxis ^= 1;
break;
case 'p':
break;
case 'z':
canDrawBase ^= 1;
break;
default:
break;
}
}
void specialKeyListener(int key, int x,int y){
switch(key){
case GLUT_KEY_DOWN: //down arrow key
cameraRadius += 40;
break;
case GLUT_KEY_UP: // up arrow key
if(cameraRadius > 40)
cameraRadius -= 40;
break;
case GLUT_KEY_RIGHT:
cameraAngle += 0.05;
break;
case GLUT_KEY_LEFT:
cameraAngle -= 0.05;
break;
case GLUT_KEY_PAGE_UP:
cameraHeight += 40;
break;
case GLUT_KEY_PAGE_DOWN:
cameraHeight -= 40;
break;
case GLUT_KEY_INSERT:
break;
case GLUT_KEY_HOME:
// cameraAngleDelta = 0.001;
break;
case GLUT_KEY_END:
// cameraAngleDelta = 0;
break;
default:
break;
}
}
void mouseListener(int button, int state, int x, int y){ //x, y is the x-y of the screen (2D)
switch(button){
case GLUT_LEFT_BUTTON:
if(state == GLUT_DOWN){ // 2 times?? in ONE click? -- solution is checking DOWN or UP
cameraAngleDelta = -cameraAngleDelta;
}
break;
case GLUT_RIGHT_BUTTON:
if(cameraRadius > 40)
cameraRadius -= 40;
break;
case GLUT_MIDDLE_BUTTON:
//........
break;
default:
break;
}
}
int main(int argc, char **argv){
glutInit(&argc,argv); //initialize the GLUT library
glutInitWindowSize(500, 500);
glutInitWindowPosition(100, 100);
/*
glutInitDisplayMode - inits display mode
GLUT_DOUBLE - allows for display on the double buffer window
GLUT_RGBA - shows color (Red, green, blue) and an alpha
GLUT_DEPTH - allows for depth buffer
*/
glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGB);
glutCreateWindow("Some Title");
init(); //codes for initialization
glEnable(GL_DEPTH_TEST); //enable Depth Testing
glutDisplayFunc(display); //display callback function
glutIdleFunc(animate); //what you want to do in the idle time (when no drawing is occuring)
glutKeyboardFunc(keyboardListener);
glutSpecialFunc(specialKeyListener);
glutMouseFunc(mouseListener);
glutMainLoop(); //The main loop of OpenGL
return 0;
}
glPixelStorei (GL_UNPACK_ALIGNMENT, 1);