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-rw-r--r--progs/samples/point.c234
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diff --git a/progs/samples/point.c b/progs/samples/point.c
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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 <GL/glut.h>
+
+
+#define CI_RED COLOR_RED
+#define CI_ANTI_ALIAS_GREEN 16
+#define CI_ANTI_ALIAS_YELLOW 32
+#define CI_ANTI_ALIAS_RED 48
+
+
+GLenum rgb, doubleBuffer, windType;
+GLint windW, windH;
+
+#include "tkmap.c"
+
+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++) {
+ glutSetColor(i+CI_ANTI_ALIAS_RED, i/15.0, 0.0, 0.0);
+ glutSetColor(i+CI_ANTI_ALIAS_YELLOW, i/15.0, i/15.0, 0.0);
+ glutSetColor(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 void Key2(int key, int x, int y)
+{
+
+ switch (key) {
+ case GLUT_KEY_LEFT:
+ point[0] -= 0.25;
+ break;
+ case GLUT_KEY_RIGHT:
+ point[0] += 0.25;
+ break;
+ case GLUT_KEY_UP:
+ point[1] += 0.25;
+ break;
+ case GLUT_KEY_DOWN:
+ point[1] -= 0.25;
+ break;
+ default:
+ return;
+ }
+
+ glutPostRedisplay();
+}
+
+static void Key(unsigned char key, int x, int y)
+{
+
+ switch (key) {
+ case 27:
+ exit(1);
+ case '1':
+ mode = !mode;
+ break;
+ case 'W':
+ size++;
+ break;
+ case 'w':
+ size--;
+ if (size < 1) {
+ size = 1;
+ }
+ break;
+ default:
+ return;
+ }
+
+ glutPostRedisplay();
+}
+
+static void Draw(void)
+{
+
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ SetColor(COLOR_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);
+ SetColor(COLOR_GREEN);
+ glBegin(GL_POINTS);
+ glVertex3fv(point);
+ glEnd();
+
+ glFlush();
+
+ if (doubleBuffer) {
+ glutSwapBuffers();
+ }
+}
+
+static GLenum Args(int argc, char **argv)
+{
+ GLint i;
+
+ rgb = GL_TRUE;
+ doubleBuffer = GL_FALSE;
+
+ 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 {
+ printf("%s (Bad option).\n", argv[i]);
+ return GL_FALSE;
+ }
+ }
+ return GL_TRUE;
+}
+
+int main(int argc, char **argv)
+{
+ glutInit(&argc, argv);
+
+ if (Args(argc, argv) == GL_FALSE) {
+ exit(1);
+ }
+
+ windW = 300;
+ windH = 300;
+ glutInitWindowPosition(0, 0); glutInitWindowSize( windW, windH);
+
+ windType = (rgb) ? GLUT_RGB : GLUT_INDEX;
+ windType |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
+ glutInitDisplayMode(windType);
+
+ if (glutCreateWindow("Point Test") == GL_FALSE) {
+ exit(1);
+ }
+
+ InitMap();
+
+ Init();
+
+ glutReshapeFunc(Reshape);
+ glutKeyboardFunc(Key);
+ glutSpecialFunc(Key2);
+ glutDisplayFunc(Draw);
+ glutMainLoop();
+ return 0;
+}