313 lines
7.8 KiB
C
313 lines
7.8 KiB
C
/*
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* (c) Copyright 1993, Silicon Graphics, Inc.
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* ALL RIGHTS RESERVED
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* Permission to use, copy, modify, and distribute this software for
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* any purpose and without fee is hereby granted, provided that the above
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* copyright notice appear in all copies and that both the copyright notice
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* and this permission notice appear in supporting documentation, and that
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* the name of Silicon Graphics, Inc. not be used in advertising
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* or publicity pertaining to distribution of the software without specific,
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* written prior permission.
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*
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* THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
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* AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
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* GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
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* SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
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* KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
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* LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
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* THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
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* ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
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* POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* US Government Users Restricted Rights
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* Use, duplication, or disclosure by the Government is subject to
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* restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
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* (c)(1)(ii) of the Rights in Technical Data and Computer Software
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* clause at DFARS 252.227-7013 and/or in similar or successor
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* clauses in the FAR or the DOD or NASA FAR Supplement.
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* Unpublished-- rights reserved under the copyright laws of the
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* United States. Contractor/manufacturer is Silicon Graphics,
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* Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
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*
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* OpenGL(TM) is a trademark of Silicon Graphics, Inc.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "tk.h"
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GLenum rgb, doubleBuffer, directRender;
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double plane[4] = {
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1.0, 0.0, -1.0, 0.0
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};
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float rotX = 5.0, rotY = -5.0, zTranslate = -65.0;
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float fogDensity = 0.02;
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GLint cubeList = 1;
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float scp[18][3] = {
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{
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1.000000, 0.000000, 0.000000
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},
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{
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1.000000, 0.000000, 5.000000
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},
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{
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0.707107, 0.707107, 0.000000
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},
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{
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0.707107, 0.707107, 5.000000
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},
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{
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0.000000, 1.000000, 0.000000
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},
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{
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0.000000, 1.000000, 5.000000
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},
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{
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-0.707107, 0.707107, 0.000000
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},
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{
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-0.707107, 0.707107, 5.000000
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},
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{
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-1.000000, 0.000000, 0.000000
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},
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{
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-1.000000, 0.000000, 5.000000
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},
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{
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-0.707107, -0.707107, 0.000000
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},
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{
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-0.707107, -0.707107, 5.000000
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},
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{
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0.000000, -1.000000, 0.000000
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},
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{
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0.000000, -1.000000, 5.000000
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},
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{
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0.707107, -0.707107, 0.000000
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},
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{
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0.707107, -0.707107, 5.000000
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},
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{
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1.000000, 0.000000, 0.000000
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},
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{
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1.000000, 0.000000, 5.000000
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},
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};
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static void Build_lists(void)
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{
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glNewList(cubeList, GL_COMPILE);
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glBegin(GL_TRIANGLE_STRIP);
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glNormal3fv(scp[0]); glVertex3fv(scp[0]);
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glNormal3fv(scp[0]); glVertex3fv(scp[1]);
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glNormal3fv(scp[2]); glVertex3fv(scp[2]);
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glNormal3fv(scp[2]); glVertex3fv(scp[3]);
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glNormal3fv(scp[4]); glVertex3fv(scp[4]);
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glNormal3fv(scp[4]); glVertex3fv(scp[5]);
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glNormal3fv(scp[6]); glVertex3fv(scp[6]);
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glNormal3fv(scp[6]); glVertex3fv(scp[7]);
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glNormal3fv(scp[8]); glVertex3fv(scp[8]);
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glNormal3fv(scp[8]); glVertex3fv(scp[9]);
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glNormal3fv(scp[10]); glVertex3fv(scp[10]);
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glNormal3fv(scp[10]); glVertex3fv(scp[11]);
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glNormal3fv(scp[12]); glVertex3fv(scp[12]);
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glNormal3fv(scp[12]); glVertex3fv(scp[13]);
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glNormal3fv(scp[14]); glVertex3fv(scp[14]);
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glNormal3fv(scp[14]); glVertex3fv(scp[15]);
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glNormal3fv(scp[16]); glVertex3fv(scp[16]);
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glNormal3fv(scp[16]); glVertex3fv(scp[17]);
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glEnd();
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glEndList();
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}
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static void Init(void)
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{
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static float ambient[] = {0.1, 0.1, 0.1, 1.0};
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static float diffuse[] = {1.0, 1.0, 1.0, 1.0};
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static float position[] = {90.0, 90.0, 0.0, 0.0};
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static float front_mat_shininess[] = {30.0};
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static float front_mat_specular[] = {0.0, 0.0, 0.0, 1.0};
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static float front_mat_diffuse[] = {0.0, 1.0, 0.0, 1.0};
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static float back_mat_shininess[] = {50.0};
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static float back_mat_specular[] = {0.0, 0.0, 1.0, 1.0};
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static float back_mat_diffuse[] = {1.0, 0.0, 0.0, 1.0};
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static float lmodel_ambient[] = {0.0, 0.0, 0.0, 1.0};
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static float fog_color[] = {0.8, 0.8, 0.8, 1.0};
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glFrontFace(GL_CW);
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glDepthFunc(GL_LEQUAL);
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glEnable(GL_DEPTH_TEST);
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glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
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glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
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glLightfv(GL_LIGHT0, GL_POSITION, position);
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glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
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glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE);
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glEnable(GL_LIGHTING);
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glEnable(GL_LIGHT0);
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glMaterialfv(GL_FRONT, GL_SHININESS, front_mat_shininess);
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glMaterialfv(GL_FRONT, GL_SPECULAR, front_mat_specular);
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glMaterialfv(GL_FRONT, GL_DIFFUSE, front_mat_diffuse);
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glMaterialfv(GL_BACK, GL_SHININESS, back_mat_shininess);
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glMaterialfv(GL_BACK, GL_SPECULAR, back_mat_specular);
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glMaterialfv(GL_BACK, GL_DIFFUSE, back_mat_diffuse);
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glEnable(GL_FOG);
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glFogi(GL_FOG_MODE, GL_EXP);
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glFogf(GL_FOG_DENSITY, fogDensity);
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if (rgb) {
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glFogfv(GL_FOG_COLOR, fog_color);
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glClearColor(0.8, 0.8, 0.8, 1.0);
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} else {
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glFogi(GL_FOG_INDEX, 1<<5);
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tkSetFogRamp(5, 3);
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glClearIndex(128);
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}
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Build_lists();
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}
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static void Reshape(int width, int height)
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{
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glViewport(0, 0, (GLint)width, (GLint)height);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluPerspective(45.0, 1.0, 1.0, 200.0);
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glMatrixMode(GL_MODELVIEW);
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}
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static GLenum Key(int key, GLenum mask)
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{
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switch (key) {
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case TK_ESCAPE:
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tkQuit();
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case TK_UP:
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rotX -= 5;
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break;
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case TK_DOWN:
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rotX += 5;
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break;
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case TK_LEFT:
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rotY -= 5;
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break;
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case TK_RIGHT:
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rotY += 5;
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break;
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case TK_D:
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if (rgb) {
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fogDensity *= 1.10;
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glFogf(GL_FOG_DENSITY, fogDensity);
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}
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break;
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case TK_d:
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if (rgb) {
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fogDensity /= 1.10;
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glFogf(GL_FOG_DENSITY, fogDensity);
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}
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break;
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default:
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return GL_FALSE;
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}
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return GL_TRUE;
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}
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static void Draw(void)
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{
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glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
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glPushMatrix();
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glTranslatef(0, 0, zTranslate);
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glRotatef(rotY, 0,1,0);
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glRotatef(rotX, 1,0,0);
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glScalef(1.0, 1.0, 10.0);
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glCallList(cubeList);
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glPopMatrix();
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glFlush();
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if (doubleBuffer) {
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tkSwapBuffers();
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}
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}
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static GLenum Args(int argc, char **argv)
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{
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GLint i;
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rgb = GL_TRUE;
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doubleBuffer = GL_FALSE;
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directRender = GL_FALSE;
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for (i = 1; i < argc; i++) {
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if (strcmp(argv[i], "-ci") == 0) {
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rgb = GL_FALSE;
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} else if (strcmp(argv[i], "-rgb") == 0) {
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rgb = GL_TRUE;
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} else if (strcmp(argv[i], "-sb") == 0) {
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doubleBuffer = GL_FALSE;
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} else if (strcmp(argv[i], "-db") == 0) {
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doubleBuffer = GL_TRUE;
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} else if (strcmp(argv[i], "-dr") == 0) {
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directRender = GL_TRUE;
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} else if (strcmp(argv[i], "-ir") == 0) {
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directRender = GL_FALSE;
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} else {
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printf("%s (Bad option).\n", argv[i]);
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return GL_FALSE;
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}
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}
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return GL_TRUE;
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}
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void main(int argc, char **argv)
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{
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GLenum type;
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if (Args(argc, argv) == GL_FALSE) {
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tkQuit();
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}
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tkInitPosition(0, 0, 300, 300);
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type = TK_DEPTH16;
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type |= (rgb) ? TK_RGB : TK_INDEX;
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type |= (doubleBuffer) ? TK_DOUBLE : TK_SINGLE;
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type |= (directRender) ? TK_DIRECT : TK_INDIRECT;
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tkInitDisplayMode(type);
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if (tkInitWindow("Fog Test") == GL_FALSE) {
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tkQuit();
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}
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Init();
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tkExposeFunc(Reshape);
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tkReshapeFunc(Reshape);
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tkKeyDownFunc(Key);
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tkDisplayFunc(Draw);
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tkExec();
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}
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