LINELIST.C

/* 
 * (c) Copyright 1993, Silicon Graphics, Inc. 
 *               1993-1995 Microsoft Corporation 
 * 
 * ALL RIGHTS RESERVED 
 * 
 * Please refer to OpenGL/readme.txt for additional information 
 * 
 */ 
 
/* 
 *  linelist.c   
 *  This program demonstrates using display lists to call  
 *  different line stipples. 
 */ 
#include "glos.h" 
 
#include <GL/gl.h> 
#include <GL/glu.h> 
#include <GL/glaux.h> 
 
void myinit(void); 
void CALLBACK display(void); 
 
#define drawOneLine(x1,y1,x2,y2) glBegin(GL_LINES); \ 
    glVertex2f ((x1),(y1)); glVertex2f ((x2),(y2)); glEnd(); 
 
GLuint offset; 
 
void myinit (void) 
{ 
/*  background to be cleared to black   */ 
    glClearColor (0.0, 0.0, 0.0, 0.0); 
    glShadeModel (GL_FLAT); 
 
    offset = glGenLists (3); 
    glNewList (offset, GL_COMPILE); 
    glDisable (GL_LINE_STIPPLE); 
    glEndList (); 
    glNewList (offset+1, GL_COMPILE); 
    glEnable (GL_LINE_STIPPLE); 
    glLineStipple (1, 0x0F0F); 
    glEndList (); 
    glNewList (offset+2, GL_COMPILE); 
    glEnable (GL_LINE_STIPPLE); 
    glLineStipple (1, 0x1111); 
    glEndList (); 
} 
 
void CALLBACK display(void) 
{ 
    glClear (GL_COLOR_BUFFER_BIT); 
 
/*  draw all lines in white */ 
    glColor3f (1.0, 1.0, 1.0); 
 
    glCallList (offset); 
    drawOneLine (50.0, 125.0, 350.0, 125.0); 
    glCallList (offset+1); 
    drawOneLine (50.0, 100.0, 350.0, 100.0); 
    glCallList (offset+2); 
    drawOneLine (50.0, 75.0, 350.0, 75.0); 
    glCallList (offset+1); 
    drawOneLine (50.0, 50.0, 350.0, 50.0); 
    glCallList (offset); 
    drawOneLine (50.0, 25.0, 350.0, 25.0); 
    glFlush (); 
} 
 
/*  Main Loop 
 *  Open window with initial window size, title bar,  
 *  RGBA display mode, and handle input events. 
 */ 
int main(int argc, char** argv) 
{ 
    auxInitDisplayMode (AUX_SINGLE | AUX_RGB); 
    auxInitPosition (0, 0, 400, 150); 
    auxInitWindow ("Display Lists"); 
    myinit (); 
    auxMainLoop(display); 
    return(0); 
}