/* * 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; }