home *** CD-ROM | disk | FTP | other *** search
- /*
- * (c) Copyright 1993, 1994, 1995, 1996 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- * Unpublished-- rights reserved under the copyright laws of the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.
- */
- #ifndef SCENE_H
- #define SCENE_H
-
- #include "Point.h"
-
- /* Index of refraction stuff */
- const GLfloat min_index = .1;
- const GLfloat max_index = 2.5;
- const int nindices = 6;
-
- const struct {
- const char *name;
- GLfloat index;
- } indices[] = {
- {"Air", 1.0},
- {"Ice", 1.31},
- {"Water", 1.33},
- {"Zinc Crown Glass", 1.517},
- {"Light Flint Glass", 1.650},
- {"Heavy Flint Glass", 1.890}
- };
-
- const int def_refraction_index = 4;
-
- typedef struct {
- GLfloat diffuse[4];
- Point_b pos;
- GLboolean shadow_mask[4];
- GLfloat matrix[16];
- char name[64];
- int on;
- } light;
-
- const int nlights = 3;
- extern light lights[];
-
- /* scene_load_texture uses no OpenGL calls and so can be called before
- * mapping the window */
- int scene_load_texture(char *texfile);
- const char def_texfile[] = /*DATADIR*/ "opengl1.512.bw.rgb";
-
- extern int possible_divisions[];
- const int npossible_divisions = 4;
- const int def_divisions_index = 1;
-
- extern GLfloat aspect;
-
- extern int draw_square, draw_shadows, draw_refraction, draw_sphere,
- draw_lights, draw_texture;
-
- /* These are names used for picking */
- const int name_background = 0;
- const int name_square = 1;
- const int name_sphere = 2;
- const int name_lights = 3;
-
- void scene_init();
- void scene_draw();
- int scene_pick(GLdouble x, GLdouble y);
-
- /* This returns all the lights to their default postions */
- void scene_reset_lights();
-
- void lights_onoff(int light, int val);
- void refraction_change(GLfloat refraction);
- void divisions_change(int divisions);
-
- /* name is one of the names defined above.
- * phi, theta are in radians and are the amount of motion requested
- * returns whether or not it did anything.
- * If update is zero, the shadows and refractions will not be recomputed */
- int scene_move(int name, float dr, float dphi, float dtheta, int update);
-
- /* This function is a companion to scene_move().
- * It recomputes the shadows and refractions - dr, dphi, and dtheta
- * should indicate whether or not the respective values were changed
- * since the stuff was last computed. */
- void scene_move_update(int name, int dr, int dphi, int dtheta);
-
- #endif
-
-