line.c revision 32001f49 
1/*
2 * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and
5 * its documentation for any purpose is hereby granted without fee, provided
6 * that (i) the above copyright notices and this permission notice appear in
7 * all copies of the software and related documentation, and (ii) the name of
8 * Silicon Graphics may not be used in any advertising or
9 * publicity relating to the software without the specific, prior written
10 * permission of Silicon Graphics.
11 *
12 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
13 * ANY KIND,
14 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
15 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
16 *
17 * IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR
18 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
19 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
20 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
21 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
22 * OF THIS SOFTWARE.
23 */
24
25#include <stdio.h>
26#include <string.h>
27#include <stdlib.h>
28#include "glut_wrap.h"
29
30
31#define CI_OFFSET 16
32
33
34GLenum rgb, doubleBuffer, windType;
35
36GLenum mode1, mode2;
37GLint size;
38float pntA[3] = {
39    -160.0, 0.0, 0.0
40};
41float pntB[3] = {
42    -130.0, 0.0, 0.0
43};
44float pntC[3] = {
45    -40.0, -50.0, 0.0
46};
47float pntD[3] = {
48    30.0, 60.0, 0.0
49};
50
51
52#include "tkmap.c"
53
54static void Init(void)
55{
56    GLint i;
57
58    glClearColor(0.0, 0.0, 0.0, 0.0);
59
60    glLineStipple(1, 0xF0E0);
61    glBlendFunc(GL_SRC_ALPHA, GL_ONE);
62
63    if (!rgb) {
64	for (i = 0; i < 16; i++) {
65	    glutSetColor(i+CI_OFFSET, i/15.0, i/15.0, 0.0);
66	}
67    }
68
69    mode1 = GL_FALSE;
70    mode2 = GL_FALSE;
71    size = 1;
72}
73
74static void Reshape(int width, int height)
75{
76
77    glViewport(0, 0, (GLint)width, (GLint)height);
78
79    glMatrixMode(GL_PROJECTION);
80    glLoadIdentity();
81    gluOrtho2D(-175, 175, -175, 175);
82    glMatrixMode(GL_MODELVIEW);
83}
84
85static void Key(unsigned char key, int x, int y)
86{
87
88    switch (key) {
89      case 27:
90	exit(1);
91      case '1':
92	mode1 = !mode1;
93	break;
94      case '2':
95	mode2 = !mode2;
96	break;
97      case 'W':
98	size++;
99	break;
100      case 'w':
101	size--;
102	if (size < 1) {
103	    size = 1;
104	}
105	break;
106      default:
107	return;
108    }
109
110    glutPostRedisplay();
111}
112
113static void Draw(void)
114{
115    GLint ci, i;
116
117    glClear(GL_COLOR_BUFFER_BIT);
118
119    glLineWidth(size);
120
121    if (mode1) {
122	glEnable(GL_LINE_STIPPLE);
123    } else {
124	glDisable(GL_LINE_STIPPLE);
125    }
126
127    if (mode2) {
128	ci = CI_OFFSET;
129	glEnable(GL_LINE_SMOOTH);
130	glEnable(GL_BLEND);
131    } else {
132	ci = COLOR_YELLOW;
133	glDisable(GL_LINE_SMOOTH);
134	glDisable(GL_BLEND);
135    }
136
137    glPushMatrix();
138
139    glShadeModel( GL_FLAT );
140
141    for (i = 0; i < 360; i += 5) {
142	glRotatef(5.0, 0,0,1);
143
144	(rgb) ? glColor3f(1.0, 1.0, 0.0) : glIndexi(ci);
145	glBegin(GL_LINE_STRIP);
146	    glVertex3fv(pntA);
147	    glVertex3fv(pntB);
148	glEnd();
149
150	glPointSize(1);
151
152	SetColor(COLOR_GREEN);
153	glBegin(GL_POINTS);
154	    glVertex3fv(pntA);
155	    glVertex3fv(pntB);
156	glEnd();
157    }
158
159    glPopMatrix();
160
161    glFlush();
162
163    if (doubleBuffer) {
164	glutSwapBuffers();
165    }
166}
167
168static GLenum Args(int argc, char **argv)
169{
170    GLint i;
171
172    rgb = GL_TRUE;
173    doubleBuffer = GL_TRUE;
174
175    for (i = 1; i < argc; i++) {
176	if (strcmp(argv[i], "-ci") == 0) {
177	    rgb = GL_FALSE;
178	} else if (strcmp(argv[i], "-rgb") == 0) {
179	    rgb = GL_TRUE;
180	} else if (strcmp(argv[i], "-sb") == 0) {
181	    doubleBuffer = GL_FALSE;
182	} else if (strcmp(argv[i], "-db") == 0) {
183	    doubleBuffer = GL_TRUE;
184	} else {
185	    printf("%s (Bad option).\n", argv[i]);
186	    return GL_FALSE;
187	}
188    }
189    return GL_TRUE;
190}
191
192int main(int argc, char **argv)
193{
194    glutInit(&argc, argv);
195
196    if (Args(argc, argv) == GL_FALSE) {
197	exit(1);
198    }
199
200    glutInitWindowPosition(0, 0); glutInitWindowSize( 300, 300);
201
202    windType = (rgb) ? GLUT_RGB : GLUT_INDEX;
203    windType |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
204    glutInitDisplayMode(windType);
205
206    if (glutCreateWindow("Line Test") == GL_FALSE) {
207	exit(1);
208    }
209
210    InitMap();
211
212    Init();
213
214    glutReshapeFunc(Reshape);
215    glutKeyboardFunc(Key);
216    glutDisplayFunc(Draw);
217    glutMainLoop();
218	return 0;
219}
220