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Amiga Magazin: Amiga-CD 2000 April & May
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AMIGA_2000_04.iso
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patches
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mesa3.1
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book.aux
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stroke.c
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1999-06-25
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/*
* (c) Copyright 1993, Silicon Graphics, Inc.
* ALL RIGHTS RESERVED
* Permission to use, copy, modify, and distribute this software for
* any purpose and without fee is hereby granted, provided that the above
* copyright notice appear in all copies and that both the copyright notice
* and this permission notice appear in supporting documentation, and that
* the name of Silicon Graphics, Inc. not be used in advertising
* or publicity pertaining to distribution of the software without specific,
* written prior permission.
*
* THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
* AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
* FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
* GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
* SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
* KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
* LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
* THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
* ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
* POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
*
* US Government Users Restricted Rights
* Use, duplication, or disclosure by the Government is subject to
* restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
* (c)(1)(ii) of the Rights in Technical Data and Computer Software
* clause at DFARS 252.227-7013 and/or in similar or successor
* clauses in the FAR or the DOD or NASA FAR Supplement.
* Unpublished-- rights reserved under the copyright laws of the
* United States. Contractor/manufacturer is Silicon Graphics,
* Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
*
* OpenGL(TM) is a trademark of Silicon Graphics, Inc.
*/
/*
* stroke.c
* This program demonstrates some characters of a
* stroke (vector) font. The characters are represented
* by display lists, which are given numbers which
* correspond to the ASCII values of the characters.
* Use of glCallLists() is demonstrated.
*/
#include <GL/gl.h>
#include <GL/glu.h>
#include <stdlib.h>
#include <string.h>
#include <GL/glaux.h>
#define PT 1
#define STROKE 2
#define END 3
typedef struct charpoint {
GLfloat x, y;
int type;
} CP;
CP Adata[] =
{
{0, 0, PT},
{0, 9, PT},
{1, 10, PT},
{4, 10, PT},
{5, 9, PT},
{5, 0, STROKE},
{0, 5, PT},
{5, 5, END}
};
CP Edata[] =
{
{5, 0, PT},
{0, 0, PT},
{0, 10, PT},
{5, 10, STROKE},
{0, 5, PT},
{4, 5, END}
};
CP Pdata[] =
{
{0, 0, PT},
{0, 10, PT},
{4, 10, PT},
{5, 9, PT},
{5, 6, PT},
{4, 5, PT},
{0, 5, END}
};
CP Rdata[] =
{
{0, 0, PT},
{0, 10, PT},
{4, 10, PT},
{5, 9, PT},
{5, 6, PT},
{4, 5, PT},
{0, 5, STROKE},
{3, 5, PT},
{5, 0, END}
};
CP Sdata[] =
{
{0, 1, PT},
{1, 0, PT},
{4, 0, PT},
{5, 1, PT},
{5, 4, PT},
{4, 5, PT},
{1, 5, PT},
{0, 6, PT},
{0, 9, PT},
{1, 10, PT},
{4, 10, PT},
{5, 9, END}
};
/*
* drawLetter() interprets the instructions from the array
* * for that letter and renders the letter with line segments.
*/
void drawLetter(CP * l)
{
glBegin(GL_LINE_STRIP);
while (1) {
switch (l->type) {
case PT:
glVertex2fv(&l->x);
break;
case STROKE:
glVertex2fv(&l->x);
glEnd();
glBegin(GL_LINE_STRIP);
break;
case END:
glVertex2fv(&l->x);
glEnd();
glTranslatef(8.0, 0.0, 0.0);
return;
}
l++;
}
}
/*
* Create a display list for each of 6 characters
*/
void myinit(void)
{
GLuint base;
glShadeModel(GL_FLAT);
base = glGenLists(128);
glListBase(base);
glNewList(base + 'A', GL_COMPILE);
drawLetter(Adata);
glEndList();
glNewList(base + 'E', GL_COMPILE);
drawLetter(Edata);
glEndList();
glNewList(base + 'P', GL_COMPILE);
drawLetter(Pdata);
glEndList();
glNewList(base + 'R', GL_COMPILE);
drawLetter(Rdata);
glEndList();
glNewList(base + 'S', GL_COMPILE);
drawLetter(Sdata);
glEndList();
glNewList(base + ' ', GL_COMPILE);
glTranslatef(8.0, 0.0, 0.0);
glEndList();
}
char *test1 = "A SPARE SERAPE APPEARS AS";
char *test2 = "APES PREPARE RARE PEPPERS";
void printStrokedString(char *s)
{
GLsizei len = strlen(s);
glCallLists(len, GL_BYTE, (GLbyte *) s);
}
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(1.0, 1.0, 1.0);
glPushMatrix();
glScalef(2.0, 2.0, 2.0);
glTranslatef(10.0, 30.0, 0.0);
printStrokedString(test1);
glPopMatrix();
glPushMatrix();
glScalef(2.0, 2.0, 2.0);
glTranslatef(10.0, 13.0, 0.0);
printStrokedString(test2);
glPopMatrix();
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, 440, 120);
if (!auxInitWindow(argv[0]))
auxQuit();
myinit();
auxMainLoop(display);
return 0;
}