Rendering problem

OpenGL OpenGL: Basic Coding
1

The following is the code for drawing a Electric pole in a scene.
While I execute the pole always stands little above the ground position. It is not fixed on the ground. What may be problem

void draw_pole()
{
glBegin(GL_LINES);
glVertex2f(0.0f,0.0f);
glVertex2f(0.0f,2.0f);
glEnd();
glBegin(GL_LINES);
glVertex2f(-2.0f,4.0f);
glVertex2f(2.0f,4.0f);
glEnd();
}

2

Well, I’m going to assume you’re not drawing the ground at Y=0…which could be a problem…but there’s no way to tell as you’ve provided about as little information as anyone could humanly provide…=P (Can we see some more code?)

3

I have a more detailed code.First I am adding a Ground in the scene. On the top of it I am drawing the ELectric pole.

void renderScene(void)
{
glColor3f(0.6f, 0.6f, 0.9f);
glBindTexture(GL_TEXTURE_2D,texName[1]);
glBegin(GL_QUADS);
/* All Tex coordinate were added */
glTexCoord2f(0.0,0.0);
glVertex3f(-100.0f, 0.0f, -100.0f);
glTexCoord2f(0.0,1.0);
glVertex3f(-100.0f, 0.0f, 100.0f);
glTexCoord2f(1.0,1.0);
glVertex3f( 100.0f, 0.0f, 100.0f);
glTexCoord2f(1.0,0.0);
glVertex3f( 100.0f, 0.0f, -100.0f);
glEnd();

glTranslatef(0,1.75,0);
for(l =-5;l<5;l++)
{
	for(m=-5;m<5;m++)
	{
		glPushMatrix();
                    	glTranslatef(l*10.0,0.0,m*10.0);
		if(l%2 == 0 && m%2 == 0)
		{
			draw_pole();
		}
		else
		{
			draw_barn(); 
		}
		glPopMatrix();
	}
}

}

draw_pole()
{

already given above

}

Regards

4

What is this line intended to do?

glTranslatef(0,1.75,0);
5

That line would be the reason why the flag pole isn’t being attached to the ground.