#include <GL/glut.h>
#include <stdlib.h>
#include <math.h>
void Init()
{
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glShadeModel(GL_FLAT);
}
void Mountain()
{
glColor3f(1.0f, 1.0f, 1.0f);
glBegin(GL_POINTS);
glVertex3f(0.0f, 0.0f, 1.0f);
glEnd();
}
void Display()
{
glClear(GL_COLOR_BUFFER_BIT );
glPushMatrix();
Mountain();
glPopMatrix();
glFlush();
}
void Reshape(int w, int h)
{
glViewport(0, 0, (GLsizei)w, (GLsizei)h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0f, (GLfloat)w/(GLfloat)h, 1.0f, 100.0f);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
int main()
{
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
glutInitWindowSize(500, 500);
glutInitWindowPosition(100, 100);
glutCreateWindow("Mountain");
Init();
glutDisplayFunc(Display);
glutReshapeFunc(Reshape);
glutMainLoop();
return 0;
}
simple code problem
Author
Hi,
I am trying to learn opengl and I tried to do a simple pixel on screen using gluPerspective and I am not getting anything on screen. I am assuming something to do with gluLookAt.
What am I doing wrong ?
Thanks for the help.
when u use gluPerspective,pls locate the position of object properly first.
jerry2
Programming,make a whole new world.
jerry2
Programming,make a whole new world.
Author
quote:Original post by ed9er
the point is behind your camera, try:
glVertex3f(0.0f, 0.0f, -2.0f);
Hi,
That works.
I was assuming that as gluPerspective has znear and zfar as 1.0f and 100.0f then for moving further I would have to increase z in the positive z-axis. Now I realize its the negative z-axis value which I should increasing.
Thank you
This topic is closed to new replies.
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