2nd commit

.vscode/tasks.json

@@ -1,5 +1,5 @@
 {
-    "version": "0.1.0",
+    "version": "2.0.0",
     "command": "g++",
     "isShellCommand": true,
     "showOutput": "always",

drawDemo.cpp

@@ -0,0 +1,264 @@
+
+/* Copyright (c) Mark J. Kilgard, 1994. */
+
+/**
+ * (c) Copyright 1993, Silicon Graphics, Inc.
+ * ALL RIGHTS RESERVED 
+ * Permission to use, copy, modify, and distribute this software for 
+ * any purpose and without fee is hereby granted, provided that the above
+ * copyright notice appear in all copies and that both the copyright notice
+ * and this permission notice appear in supporting documentation, and that 
+ * the name of Silicon Graphics, Inc. not be used in advertising
+ * or publicity pertaining to distribution of the software without specific,
+ * written prior permission. 
+ *
+ * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "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, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
+ * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
+ * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
+ * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
+ * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
+ * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
+ * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
+ * 
+ * US Government Users Restricted Rights 
+ * Use, duplication, or disclosure by the Government is subject to
+ * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
+ * (c)(1)(ii) of the Rights in Technical Data and Computer Software
+ * clause at DFARS 252.227-7013 and/or in similar or successor
+ * clauses in the FAR or the DOD or NASA FAR Supplement.
+ * Unpublished-- rights reserved under the copyright laws of the
+ * United States.  Contractor/manufacturer is Silicon Graphics,
+ * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
+ *
+ * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <GL/glut.h>
+
+GLenum doubleBuffer;
+/* *INDENT-OFF* */
+double plane[4] = {
+  1.0, 0.0, -1.0, 0.0
+};
+float rotX = 5.0, rotY = -5.0, zTranslate = -65.0;
+float fogDensity = 0.02;
+GLint cubeList = 1;
+
+float scp[18][3] = {
+  {1.000000, 0.000000, 0.000000},
+  {1.000000, 0.000000, 5.000000},
+  {0.707107, 0.707107, 0.000000},
+  {0.707107, 0.707107, 5.000000},
+  {0.000000, 1.000000, 0.000000},
+  {0.000000, 1.000000, 5.000000},
+  {-0.707107, 0.707107, 0.000000},
+  {-0.707107, 0.707107, 5.000000},
+  {-1.000000, 0.000000, 0.000000},
+  {-1.000000, 0.000000, 5.000000},
+  {-0.707107, -0.707107, 0.000000},
+  {-0.707107, -0.707107, 5.000000},
+  {0.000000, -1.000000, 0.000000},
+  {0.000000, -1.000000, 5.000000},
+  {0.707107, -0.707107, 0.000000},
+  {0.707107, -0.707107, 5.000000},
+  {1.000000, 0.000000, 0.000000},
+  {1.000000, 0.000000, 5.000000},
+};
+
+static float ambient[] = {0.1, 0.1, 0.1, 1.0};
+static float diffuse[] = {1.0, 1.0, 1.0, 1.0};
+static float position[] = {90.0, 90.0, 0.0, 0.0};
+static float front_mat_shininess[] = {30.0};
+static float front_mat_specular[] = {0.0, 0.0, 0.0, 1.0};
+static float front_mat_diffuse[] = {0.0, 1.0, 0.0, 1.0};
+static float back_mat_shininess[] = {50.0};
+static float back_mat_specular[] = {0.0, 0.0, 1.0, 1.0};
+static float back_mat_diffuse[] = {1.0, 0.0, 0.0, 1.0};
+static float lmodel_ambient[] = {0.0, 0.0, 0.0, 1.0};
+static float fog_color[] = {0.8, 0.8, 0.8, 1.0};
+/* *INDENT-ON* */
+
+/* ARGSUSED1 */
+static void
+Key(unsigned char key, int x, int y)
+{
+  switch (key) {
+  case 'd':
+    fogDensity *= 1.10;
+    glFogf(GL_FOG_DENSITY, fogDensity);
+    glutPostRedisplay();
+    break;
+  case 'D':
+    fogDensity /= 1.10;
+    glFogf(GL_FOG_DENSITY, fogDensity);
+    glutPostRedisplay();
+    break;
+  case 27:
+    exit(0);
+  }
+}
+
+/* ARGSUSED1 */
+static void
+SpecialKey(int key, int x, int y)
+{
+  switch (key) {
+  case GLUT_KEY_UP:
+    rotX -= 5;
+    glutPostRedisplay();
+    break;
+  case GLUT_KEY_DOWN:
+    rotX += 5;
+    glutPostRedisplay();
+    break;
+  case GLUT_KEY_LEFT:
+    rotY -= 5;
+    glutPostRedisplay();
+    break;
+  case GLUT_KEY_RIGHT:
+    rotY += 5;
+    glutPostRedisplay();
+    break;
+  }
+}
+
+
+static void
+Draw(void)
+{
+  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+  glPushMatrix();
+
+  glTranslatef(0, 0, zTranslate);
+  /* XXX hooky dual axis rotation! */
+  glRotatef(rotY, 0, 1, 0);
+  glRotatef(rotX, 1, 0, 0);
+  glScalef(1.0, 1.0, 10.0);
+
+  glCallList(cubeList);
+
+  glPopMatrix();
+
+  if (doubleBuffer) {
+    glutSwapBuffers();
+  } else {
+    glFlush();
+  }
+}
+
+static void
+Args(int argc, char **argv)
+{
+  GLint i;
+  doubleBuffer = GL_TRUE;
+
+  for (i = 1; i < argc; i++) {
+    if (strcmp(argv[i], "-sb") == 0) {
+      doubleBuffer = GL_FALSE;
+    } else if (strcmp(argv[i], "-db") == 0) {
+      doubleBuffer = GL_TRUE;
+    }
+  }
+}
+
+int
+main(int argc, char **argv)
+{
+  GLenum type;
+
+  glutInit(&argc, argv);
+  Args(argc, argv);
+
+  type = GLUT_RGB | GLUT_DEPTH;
+  type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
+  glutInitDisplayMode(type);
+  glutInitWindowSize(300, 300);
+  glutCreateWindow("Fog Test");
+
+  glFrontFace(GL_CW);
+
+  glEnable(GL_DEPTH_TEST);
+
+  glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
+  glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
+  glLightfv(GL_LIGHT0, GL_POSITION, position);
+  glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
+  glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE);
+  glEnable(GL_LIGHTING);
+  glEnable(GL_LIGHT0);
+
+  glMaterialfv(GL_FRONT, GL_SHININESS, front_mat_shininess);
+  glMaterialfv(GL_FRONT, GL_SPECULAR, front_mat_specular);
+  glMaterialfv(GL_FRONT, GL_DIFFUSE, front_mat_diffuse);
+  glMaterialfv(GL_BACK, GL_SHININESS, back_mat_shininess);
+  glMaterialfv(GL_BACK, GL_SPECULAR, back_mat_specular);
+  glMaterialfv(GL_BACK, GL_DIFFUSE, back_mat_diffuse);
+
+  glEnable(GL_FOG);
+  glFogi(GL_FOG_MODE, GL_EXP);
+  glFogf(GL_FOG_DENSITY, fogDensity);
+  glFogfv(GL_FOG_COLOR, fog_color);
+  glClearColor(0.8, 0.8, 0.8, 1.0);
+  /* *INDENT-OFF* */
+  glNewList(cubeList, GL_COMPILE);
+    glBegin(GL_TRIANGLE_STRIP);
+      glNormal3fv(scp[0]);
+      glVertex3fv(scp[0]);
+      glNormal3fv(scp[0]);
+      glVertex3fv(scp[1]);
+      glNormal3fv(scp[2]);
+      glVertex3fv(scp[2]);
+      glNormal3fv(scp[2]);
+      glVertex3fv(scp[3]);
+      glNormal3fv(scp[4]);
+      glVertex3fv(scp[4]);
+      glNormal3fv(scp[4]);
+      glVertex3fv(scp[5]);
+      glNormal3fv(scp[6]);
+      glVertex3fv(scp[6]);
+      glNormal3fv(scp[6]);
+      glVertex3fv(scp[7]);
+      glNormal3fv(scp[8]);
+      glVertex3fv(scp[8]);
+      glNormal3fv(scp[8]);
+      glVertex3fv(scp[9]);
+      glNormal3fv(scp[10]);
+      glVertex3fv(scp[10]);
+      glNormal3fv(scp[10]);
+      glVertex3fv(scp[11]);
+      glNormal3fv(scp[12]);
+      glVertex3fv(scp[12]);
+      glNormal3fv(scp[12]);
+      glVertex3fv(scp[13]);
+      glNormal3fv(scp[14]);
+      glVertex3fv(scp[14]);
+      glNormal3fv(scp[14]);
+      glVertex3fv(scp[15]);
+      glNormal3fv(scp[16]);
+      glVertex3fv(scp[16]);
+      glNormal3fv(scp[16]);
+      glVertex3fv(scp[17]);
+    glEnd();
+  glEndList();
+  /* *INDENT-ON* */
+
+  glMatrixMode(GL_PROJECTION);
+  glLoadIdentity();
+  gluPerspective(45.0, 1.0, 1.0, 200.0);
+  glMatrixMode(GL_MODELVIEW);
+
+  glutKeyboardFunc(Key);
+  glutSpecialFunc(SpecialKey);
+  glutDisplayFunc(Draw);
+  glutMainLoop();
+  return 0;             /* ANSI C requires main to return int. */
+}