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/*
* Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that (i) the above copyright notices and this permission notice appear in
* all copies of the software and related documentation, and (ii) the name of
* Silicon Graphics may not be used in any advertising or
* publicity relating to the software without the specific, prior written
* permission of Silicon Graphics.
*
* THE SOFTWARE IS PROVIDED "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 BE LIABLE FOR
* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "gltk.h"
#define CI_RED TK_RED
#define CI_ANTI_ALIAS_GREEN 16
#define CI_ANTI_ALIAS_YELLOW 32
#define CI_ANTI_ALIAS_RED 48
GLenum rgb, doubleBuffer, directRender, windType;
GLint windW, windH;
GLenum mode;
GLint size;
float point[3] = {
1.0, 1.0, 0.0
};
static void Init(void)
{
GLint i;
glClearColor(0.0, 0.0, 0.0, 0.0);
glBlendFunc(GL_SRC_ALPHA, GL_ZERO);
if (!rgb) {
for (i = 0; i < 16; i++) {
tkSetOneColor(i+CI_ANTI_ALIAS_RED, i/15.0, 0.0, 0.0);
tkSetOneColor(i+CI_ANTI_ALIAS_YELLOW, i/15.0, i/15.0, 0.0);
tkSetOneColor(i+CI_ANTI_ALIAS_GREEN, 0.0, i/15.0, 0.0);
}
}
mode = GL_FALSE;
size = 1;
}
static void Reshape(int width, int height)
{
windW = (GLint)width;
windH = (GLint)height;
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(-windW/2, windW/2, -windH/2, windH/2);
glMatrixMode(GL_MODELVIEW);
}
static GLenum Key(int key, GLenum mask)
{
switch (key) {
case TK_ESCAPE:
tkQuit();
case TK_1:
mode = !mode;
break;
case TK_W:
size++;
break;
case TK_w:
size--;
if (size < 1) {
size = 1;
}
break;
case TK_LEFT:
point[0] -= 0.25;
break;
case TK_RIGHT:
point[0] += 0.25;
break;
case TK_UP:
point[1] += 0.25;
break;
case TK_DOWN:
point[1] -= 0.25;
break;
default:
return GL_FALSE;
}
return GL_TRUE;
}
static void Draw(void)
{
glClear(GL_COLOR_BUFFER_BIT);
TK_SETCOLOR(windType, TK_YELLOW);
glBegin(GL_LINE_STRIP);
glVertex2f(-windW/2, 0);
glVertex2f(windW/2, 0);
glEnd();
glBegin(GL_LINE_STRIP);
glVertex2f(0, -windH/2);
glVertex2f(0, windH/2);
glEnd();
if (mode) {
glEnable(GL_BLEND);
glEnable(GL_POINT_SMOOTH);
} else {
glDisable(GL_BLEND);
glDisable(GL_POINT_SMOOTH);
}
glPointSize(size);
if (mode) {
(rgb) ? glColor3f(1.0, 0.0, 0.0) : glIndexf(CI_ANTI_ALIAS_RED);
} else {
(rgb) ? glColor3f(1.0, 0.0, 0.0) : glIndexf(CI_RED);
}
glBegin(GL_POINTS);
glVertex3fv(point);
glEnd();
glDisable(GL_POINT_SMOOTH);
glDisable(GL_BLEND);
glPointSize(1);
TK_SETCOLOR(windType, TK_GREEN);
glBegin(GL_POINTS);
glVertex3fv(point);
glEnd();
glFlush();
if (doubleBuffer) {
tkSwapBuffers();
}
}
static GLenum Args(int argc, char **argv)
{
GLint i;
rgb = GL_TRUE;
doubleBuffer = GL_FALSE;
directRender = GL_TRUE;
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-ci") == 0) {
rgb = GL_FALSE;
} else if (strcmp(argv[i], "-rgb") == 0) {
rgb = GL_TRUE;
} else if (strcmp(argv[i], "-sb") == 0) {
doubleBuffer = GL_FALSE;
} else if (strcmp(argv[i], "-db") == 0) {
doubleBuffer = GL_TRUE;
} else if (strcmp(argv[i], "-dr") == 0) {
directRender = GL_TRUE;
} else if (strcmp(argv[i], "-ir") == 0) {
directRender = GL_FALSE;
} else {
printf("%s (Bad option).\n", argv[i]);
return GL_FALSE;
}
}
return GL_TRUE;
}
void main(int argc, char **argv)
{
if (Args(argc, argv) == GL_FALSE) {
tkQuit();
}
windW = 300;
windH = 300;
tkInitPosition(0, 0, windW, windH);
windType = (rgb) ? TK_RGB : TK_INDEX;
windType |= (doubleBuffer) ? TK_DOUBLE : TK_SINGLE;
windType |= (directRender) ? TK_DIRECT : TK_INDIRECT;
tkInitDisplayMode(windType);
if (tkInitWindow("Point Test") == GL_FALSE) {
tkQuit();
}
Init();
tkExposeFunc(Reshape);
tkReshapeFunc(Reshape);
tkKeyDownFunc(Key);
tkDisplayFunc(Draw);
tkExec();
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.