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-rw-r--r--progs/samples/line.c219
1 files changed, 219 insertions, 0 deletions
diff --git a/progs/samples/line.c b/progs/samples/line.c
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+++ b/progs/samples/line.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_OFFSET 16
+
+
+GLenum rgb, doubleBuffer, windType;
+
+GLenum mode1, mode2;
+GLint size;
+float pntA[3] = {
+ -160.0, 0.0, 0.0
+};
+float pntB[3] = {
+ -130.0, 0.0, 0.0
+};
+float pntC[3] = {
+ -40.0, -50.0, 0.0
+};
+float pntD[3] = {
+ 30.0, 60.0, 0.0
+};
+
+
+#include "tkmap.c"
+
+static void Init(void)
+{
+ GLint i;
+
+ glClearColor(0.0, 0.0, 0.0, 0.0);
+
+ glLineStipple(1, 0xF0E0);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE);
+
+ if (!rgb) {
+ for (i = 0; i < 16; i++) {
+ glutSetColor(i+CI_OFFSET, i/15.0, i/15.0, 0.0);
+ }
+ }
+
+ mode1 = GL_FALSE;
+ mode2 = GL_FALSE;
+ size = 1;
+}
+
+static void Reshape(int width, int height)
+{
+
+ glViewport(0, 0, (GLint)width, (GLint)height);
+
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ gluOrtho2D(-175, 175, -175, 175);
+ glMatrixMode(GL_MODELVIEW);
+}
+
+static void Key(unsigned char key, int x, int y)
+{
+
+ switch (key) {
+ case 27:
+ exit(1);
+ case '1':
+ mode1 = !mode1;
+ break;
+ case '2':
+ mode2 = !mode2;
+ break;
+ case 'W':
+ size++;
+ break;
+ case 'w':
+ size--;
+ if (size < 1) {
+ size = 1;
+ }
+ break;
+ default:
+ return;
+ }
+
+ glutPostRedisplay();
+}
+
+static void Draw(void)
+{
+ GLint ci, i;
+
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ glLineWidth(size);
+
+ if (mode1) {
+ glEnable(GL_LINE_STIPPLE);
+ } else {
+ glDisable(GL_LINE_STIPPLE);
+ }
+
+ if (mode2) {
+ ci = CI_OFFSET;
+ glEnable(GL_LINE_SMOOTH);
+ glEnable(GL_BLEND);
+ } else {
+ ci = COLOR_YELLOW;
+ glDisable(GL_LINE_SMOOTH);
+ glDisable(GL_BLEND);
+ }
+
+ glPushMatrix();
+
+ glShadeModel( GL_FLAT );
+
+ for (i = 0; i < 360; i += 5) {
+ glRotatef(5.0, 0,0,1);
+
+ (rgb) ? glColor3f(1.0, 1.0, 0.0) : glIndexi(ci);
+ glBegin(GL_LINE_STRIP);
+ glVertex3fv(pntA);
+ glVertex3fv(pntB);
+ glEnd();
+
+ glPointSize(1);
+
+ SetColor(COLOR_GREEN);
+ glBegin(GL_POINTS);
+ glVertex3fv(pntA);
+ glVertex3fv(pntB);
+ glEnd();
+ }
+
+ glPopMatrix();
+
+ 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);
+ }
+
+ glutInitWindowPosition(0, 0); glutInitWindowSize( 300, 300);
+
+ windType = (rgb) ? GLUT_RGB : GLUT_INDEX;
+ windType |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
+ glutInitDisplayMode(windType);
+
+ if (glutCreateWindow("Line Test") == GL_FALSE) {
+ exit(1);
+ }
+
+ InitMap();
+
+ Init();
+
+ glutReshapeFunc(Reshape);
+ glutKeyboardFunc(Key);
+ glutDisplayFunc(Draw);
+ glutMainLoop();
+ return 0;
+}