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background color is not changed in OpenGL using glClearColor() function

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I'm doing some basic code about OpenGL library, and I'm trying to change the background color using glClearColor(), but the window's color is always black.

#include <stdlib.h>
#include <GL/glew.h>
#include <GL/glut.h> // we use GLUT !
#pragma comment(lib, "glew32.lib")

float gpBGColor[4] = 1.0, 0.0, 0.0, 1.0 ;
void myinit(void) 
 //glClearColor(gpBGColor[0], gpBGColor[1], gpBGColor[2], gpBGColor[3]); // white
 //glClear(GL_COLOR_BUFFER_BIT);


void mydisplay(void) GL_DEPTH_BUFFER_BIT);
 //glFlush();


void mykeyboard(unsigned char key, int x, int y) 
 switch (key) 
 case 27: exit(1); break;
 case 'Q': 
 case 'q': gpBGColor[0] += 0.01f; break;
 

 glutPostRedisplay();


int main(int argc, char* argv[]) GLUT_RGB 

In addition, when I set up the window's size to (200, 200) or (400, 400) or (800, 800), the color of the window is always white. I don't know the reason why it does work like this.

c++ opengl

share|improve this question

asked Mar 27 at 6:50

yoon1Feyoon1Fe

1

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  Why did you comment glFlush()? Try GLUT_DOUBLE and glutSwapBuffers
  
  – Rabbid76
  Mar 27 at 6:58
  

  
  
  
  

add a comment | 

0

1

I'm doing some basic code about OpenGL library, and I'm trying to change the background color using glClearColor(), but the window's color is always black.

#include <stdlib.h>
#include <GL/glew.h>
#include <GL/glut.h> // we use GLUT !
#pragma comment(lib, "glew32.lib")

float gpBGColor[4] = 1.0, 0.0, 0.0, 1.0 ;
void myinit(void) 
 //glClearColor(gpBGColor[0], gpBGColor[1], gpBGColor[2], gpBGColor[3]); // white
 //glClear(GL_COLOR_BUFFER_BIT);


void mydisplay(void) GL_DEPTH_BUFFER_BIT);
 //glFlush();


void mykeyboard(unsigned char key, int x, int y) 
 switch (key) 
 case 27: exit(1); break;
 case 'Q': 
 case 'q': gpBGColor[0] += 0.01f; break;
 

 glutPostRedisplay();


int main(int argc, char* argv[]) GLUT_RGB 

In addition, when I set up the window's size to (200, 200) or (400, 400) or (800, 800), the color of the window is always white. I don't know the reason why it does work like this.

c++ opengl

share|improve this question

asked Mar 27 at 6:50

yoon1Feyoon1Fe

1

• 
  
  
  

  
  3
  

  
  
  
  
  
  

  
  
  Why did you comment glFlush()? Try GLUT_DOUBLE and glutSwapBuffers
  
  – Rabbid76
  Mar 27 at 6:58
  

  
  
  
  

add a comment | 

I'm doing some basic code about OpenGL library, and I'm trying to change the background color using glClearColor(), but the window's color is always black.

#include <stdlib.h>
#include <GL/glew.h>
#include <GL/glut.h> // we use GLUT !
#pragma comment(lib, "glew32.lib")

float gpBGColor[4] = 1.0, 0.0, 0.0, 1.0 ;
void myinit(void) 
 //glClearColor(gpBGColor[0], gpBGColor[1], gpBGColor[2], gpBGColor[3]); // white
 //glClear(GL_COLOR_BUFFER_BIT);


void mydisplay(void) GL_DEPTH_BUFFER_BIT);
 //glFlush();


void mykeyboard(unsigned char key, int x, int y) 
 switch (key) 
 case 27: exit(1); break;
 case 'Q': 
 case 'q': gpBGColor[0] += 0.01f; break;
 

 glutPostRedisplay();


int main(int argc, char* argv[]) GLUT_RGB 

In addition, when I set up the window's size to (200, 200) or (400, 400) or (800, 800), the color of the window is always white. I don't know the reason why it does work like this.

c++ opengl

share|improve this question

asked Mar 27 at 6:50

yoon1Feyoon1Fe

1

#include <stdlib.h>
#include <GL/glew.h>
#include <GL/glut.h> // we use GLUT !
#pragma comment(lib, "glew32.lib")

float gpBGColor[4] = 1.0, 0.0, 0.0, 1.0 ;
void myinit(void) 
 //glClearColor(gpBGColor[0], gpBGColor[1], gpBGColor[2], gpBGColor[3]); // white
 //glClear(GL_COLOR_BUFFER_BIT);


void mydisplay(void) GL_DEPTH_BUFFER_BIT);
 //glFlush();


void mykeyboard(unsigned char key, int x, int y) 
 switch (key) 
 case 27: exit(1); break;
 case 'Q': 
 case 'q': gpBGColor[0] += 0.01f; break;
 

 glutPostRedisplay();


int main(int argc, char* argv[]) GLUT_RGB 

share|improve this question

asked Mar 27 at 6:50

yoon1Feyoon1Fe

1

share|improve this question

asked Mar 27 at 6:50

yoon1Feyoon1Fe

1

asked Mar 27 at 6:50

yoon1Feyoon1Fe

1

asked Mar 27 at 6:50

yoon1Feyoon1Fe

1