#include "pch.c"
#pragma hdrstop

/*  GL_SMOOTH is actually the default shading model.  */
static void myinit (void)
{
    glShadeModel (GL_SMOOTH);
}

static void triangle(void)
{
    glBegin (GL_TRIANGLES);
    glColor3f (1.0, 0.0, 0.0);
    glVertex2f (5.0, 5.0);
    glColor3f (0.0, 1.0, 0.0);
    glVertex2f (25.0, 5.0);
    glColor3f (0.0, 0.0, 1.0);
    glVertex2f (5.0, 25.0);
    glEnd ();
}

static void display(void)
{
    glClear (GL_COLOR_BUFFER_BIT);
    triangle ();
    glFlush ();
}

static void myReshape(GLsizei w, GLsizei h)
{
    glViewport(0, 0, w, h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    if (w <= h) 
	gluOrtho2D (0.0, 30.0, 0.0, 30.0 * (GLfloat) h/(GLfloat) w);
    else 
	gluOrtho2D (0.0, 30.0 * (GLfloat) w/(GLfloat) h, 0.0, 30.0);
    glMatrixMode(GL_MODELVIEW);
}

#define WIDTH 500
#define HEIGHT 500

static void OglBounds(int *w, int *h)
{
    *w = WIDTH;
    *h = HEIGHT;
}

static void OglDraw(int w, int h)
{
    myinit();
    myReshape(w, h);
    display();
}

OglModule oglmod_smooth =
{
    "smooth",
    NULL,
    OglBounds,
    NULL,
    OglDraw
};