166 lines
4.9 KiB
C
166 lines
4.9 KiB
C
/*
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* (c) Copyright 1993, Silicon Graphics, Inc.
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* ALL RIGHTS RESERVED
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* Permission to use, copy, modify, and distribute this software for
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* any purpose and without fee is hereby granted, provided that the above
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* copyright notice appear in all copies and that both the copyright notice
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* and this permission notice appear in supporting documentation, and that
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* the name of Silicon Graphics, Inc. not be used in advertising
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* or publicity pertaining to distribution of the software without specific,
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* written prior permission.
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*
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* THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
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* AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
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* GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
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* SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
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* KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
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* LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
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* THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
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* ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
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* POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* US Government Users Restricted Rights
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* Use, duplication, or disclosure by the Government is subject to
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* restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
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* (c)(1)(ii) of the Rights in Technical Data and Computer Software
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* clause at DFARS 252.227-7013 and/or in similar or successor
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* clauses in the FAR or the DOD or NASA FAR Supplement.
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* Unpublished-- rights reserved under the copyright laws of the
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* United States. Contractor/manufacturer is Silicon Graphics,
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* Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
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*
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* OpenGL(TM) is a trademark of Silicon Graphics, Inc.
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*/
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/*
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* stroke.c
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* This program demonstrates some characters of a
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* stroke (vector) font. The characters are represented
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* by display lists, which are given numbers which
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* correspond to the ASCII values of the characters.
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* Use of glCallLists() is demonstrated.
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*/
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#include <windows.h>
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#include <GL/gl.h>
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#include <GL/glu.h>
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#include "glaux.h"
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#define PT 1
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#define STROKE 2
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#define END 3
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typedef struct charpoint {
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GLfloat x, y;
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int type;
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} CP;
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CP Adata[] = {
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{ 0, 0, PT}, {0, 9, PT}, {1, 10, PT}, {4, 10, PT},
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{5, 9, PT}, {5, 0, STROKE}, {0, 5, PT}, {5, 5, END}
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};
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CP Edata[] = {
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{5, 0, PT}, {0, 0, PT}, {0, 10, PT}, {5, 10, STROKE},
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{0, 5, PT}, {4, 5, END}
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};
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CP Pdata[] = {
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{0, 0, PT}, {0, 10, PT}, {4, 10, PT}, {5, 9, PT}, {5, 6, PT},
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{4, 5, PT}, {0, 5, END}
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};
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CP Rdata[] = {
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{0, 0, PT}, {0, 10, PT}, {4, 10, PT}, {5, 9, PT}, {5, 6, PT},
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{4, 5, PT}, {0, 5, STROKE}, {3, 5, PT}, {5, 0, END}
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};
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CP Sdata[] = {
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{0, 1, PT}, {1, 0, PT}, {4, 0, PT}, {5, 1, PT}, {5, 4, PT},
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{4, 5, PT}, {1, 5, PT}, {0, 6, PT}, {0, 9, PT}, {1, 10, PT},
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{4, 10, PT}, {5, 9, END}
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};
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/* drawLetter() interprets the instructions from the array
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* for that letter and renders the letter with line segments.
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*/
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void drawLetter(CP *l)
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{
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glBegin(GL_LINE_STRIP);
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while (1) {
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switch (l->type) {
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case PT:
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glVertex2fv(&l->x);
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break;
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case STROKE:
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glVertex2fv(&l->x);
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glEnd();
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glBegin(GL_LINE_STRIP);
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break;
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case END:
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glVertex2fv(&l->x);
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glEnd();
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glTranslatef(8.0, 0.0, 0.0);
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return;
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}
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l++;
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}
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}
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/* Create a display list for each of 6 characters */
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void myinit (void)
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{
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GLuint base;
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glShadeModel (GL_FLAT);
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base = glGenLists (128);
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glListBase(base);
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glNewList(base+'A', GL_COMPILE); drawLetter(Adata); glEndList();
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glNewList(base+'E', GL_COMPILE); drawLetter(Edata); glEndList();
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glNewList(base+'P', GL_COMPILE); drawLetter(Pdata); glEndList();
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glNewList(base+'R', GL_COMPILE); drawLetter(Rdata); glEndList();
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glNewList(base+'S', GL_COMPILE); drawLetter(Sdata); glEndList();
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glNewList(base+' ', GL_COMPILE); glTranslatef(8.0, 0.0, 0.0); glEndList();
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}
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char *test1 = "A SPARE SERAPE APPEARS AS";
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char *test2 = "APES PREPARE RARE PEPPERS";
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void printStrokedString(char *s)
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{
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GLsizei len = strlen(s);
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glCallLists(len, GL_BYTE, (GLbyte *)s);
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}
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void display(void)
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{
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glClear(GL_COLOR_BUFFER_BIT);
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glColor3f(1.0, 1.0, 1.0);
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glPushMatrix();
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glScalef(2.0, 2.0, 2.0);
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glTranslatef(10.0, 30.0, 0.0);
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printStrokedString(test1);
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glPopMatrix();
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glPushMatrix();
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glScalef(2.0, 2.0, 2.0);
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glTranslatef(10.0, 13.0, 0.0);
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printStrokedString(test2);
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glPopMatrix();
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glFlush();
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}
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/* Main Loop
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* Open window with initial window size, title bar,
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* RGBA display mode, and handle input events.
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*/
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int main(int argc, char** argv)
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{
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auxInitDisplayMode (AUX_SINGLE | AUX_RGB);
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auxInitPosition (0, 0, 440, 120);
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auxInitWindow (argv[0]);
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myinit ();
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auxMainLoop(display);
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}
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