What am i missing or doing wrong?

This is a discussion on What am i missing or doing wrong? within the C++ Programming forums, part of the General Programming Boards category; ok, im just trying to open an opengl window and make a triangle appear. this code is based on a ...

  1. #1
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    Join Date
    Jun 2005
    Posts
    1

    Question What am i missing or doing wrong?

    ok, im just trying to open an opengl window and make a triangle appear. this code is based on a tutorial i found. what am i missing or doing wrong?

    Code:
    #include <GL\glut.h>
    
    
    void Display(void)
    {
    	glClear(GL_COLOR_BUFFER_BIT);
    	glLoadIdentity();
    	glBegin(GL_POLYGON);
    		glColor3f(0.0,0.0,0.0);
    		glVertex3f(-0.5,-0.5,-3.0);
    		glColor3f(1.0,0.0,0.0);
    		glVertex3f(0.5,-0.5,-3.0);
    		glColor3f(0.0,0.0,1.0);
    		glVertex3f(0.5,0.5,-3.0);
    	glEnd();
    	glFlush();			
    }
    
    void Reshape(int x, int y)
    {
    	if (y == 0 || x == 0) return;  
    	glMatrixMode(GL_PROJECTION);  
    	glLoadIdentity();
    	gluPerspective(40.0,(GLdouble)x/(GLdouble)y,0.5,20.0);
    	glMatrixMode(GL_MODELVIEW);
    	glViewport(0,0,x,y);  
    }
    
    int main (int argc, char **argv)
    {
    	
    	glutInit(&argc, argv);
    	glutInitDisplayMode(GLUT_SINGLE);
    	glutInitWindowSize(300,300);
    	glutCreateWindow("Intro");
    	glClearColor(0.0,0.0,0.0,0.0);
    	glutDisplayFunc(Display);
    	glutReshapeFunc(Reshape);
    	glutMainLoop();
    	return 0;
    }

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    Apr 2003
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