247 lines
7 KiB
C++
247 lines
7 KiB
C++
// tile.hxx -- routines to handle a scenery tile
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//
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// Written by Curtis Olson, started May 1998.
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//
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// Copyright (C) 1998 Curtis L. Olson - curt@infoplane.com
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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// (Log is kept at end of this file)
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#ifndef _TILE_HXX
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#define _TILE_HXX
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#ifndef __cplusplus
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# error This library requires C++
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#endif
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#ifdef HAVE_WINDOWS_H
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# include <windows.h>
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#endif
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#include <GL/glut.h>
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#include <XGL/xgl.h>
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#if defined ( __sun__ )
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extern "C" void *memmove(void *, const void *, size_t);
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extern "C" void *memset(void *, int, size_t);
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#endif
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#include <list> // STL list
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#include <Bucket/bucketutils.h>
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#include <Include/fg_types.h>
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#include <Math/mat3.h>
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#ifdef NEEDNAMESPACESTD
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using namespace std;
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#endif
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// Maximum nodes per tile
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#define MAX_NODES 2000
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// Forward declarations
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class fgTILE;
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class fgMATERIAL;
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class fgFACE {
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public:
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int n1, n2, n3;
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fgFACE();
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~fgFACE();
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fgFACE( const fgFACE & image );
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bool operator < ( const fgFACE & rhs );
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bool operator == ( const fgFACE & rhs );
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};
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// Object fragment data class
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class fgFRAGMENT {
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public:
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// culling data for this object fragment (fine grain culling)
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fgPoint3d center;
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double bounding_radius;
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// variable offset data for this object fragment for this frame
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// fgCartesianPoint3d tile_offset;
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// saved transformation matrix for this fragment (used by renderer)
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// GLfloat matrix[16];
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// tile_ptr & material_ptr are set so that when we traverse the
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// list of fragments we can quickly reference back the tile or
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// material property this fragment is assigned to.
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// material property pointer
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fgMATERIAL *material_ptr;
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// tile pointer
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fgTILE *tile_ptr;
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// OpenGL display list for fragment data
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GLint display_list;
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// face list (this indexes into the master tile vertex list)
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list < fgFACE > faces;
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// number of faces in this fragment
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int num_faces;
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// Add a face to the face list
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void add_face(int n1, int n2, int n3);
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// test if line intesects with this fragment. p0 and p1 are the
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// two line end points of the line. If side_flag is true, check
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// to see that end points are on opposite sides of face. Returns
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// 1 if it does, 0 otherwise. If it intesects, result is the
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// point of intersection
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int intersect( fgPoint3d *end0, fgPoint3d *end1, int side_flag,
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fgPoint3d *result);
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// Constructors
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fgFRAGMENT ();
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fgFRAGMENT ( const fgFRAGMENT &image );
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// Destructor
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~fgFRAGMENT ( );
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// operators
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fgFRAGMENT & operator = ( const fgFRAGMENT & rhs );
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bool operator == ( const fgFRAGMENT & rhs );
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bool operator < ( const fgFRAGMENT & rhs );
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};
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// Scenery tile class
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class fgTILE {
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public:
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// node list (the per fragment face lists reference this node list)
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double (*nodes)[3];
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int ncount;
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// culling data for whole tile (course grain culling)
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fgPoint3d center;
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double bounding_radius;
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fgPoint3d offset;
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GLdouble model_view[16];
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// this tile's official location in the world
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fgBUCKET tile_bucket;
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// the tile cache will mark here if the tile is being used
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int used;
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list < fgFRAGMENT > fragment_list;
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// Constructor
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fgTILE ( void );
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// Destructor
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~fgTILE ( void );
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};
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#endif // _TILE_HXX
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// $Log$
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// Revision 1.16 1998/08/22 02:01:34 curt
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// increased fragment list size.
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//
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// Revision 1.15 1998/08/20 15:12:06 curt
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// Used a forward declaration of classes fgTILE and fgMATERIAL to eliminate
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// the need for "void" pointers and casts.
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// Quick hack to count the number of scenery polygons that are being drawn.
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//
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// Revision 1.14 1998/08/12 21:13:06 curt
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// material.cxx: don't load textures if they are disabled
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// obj.cxx: optimizations from Norman Vine
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// tile.cxx: minor tweaks
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// tile.hxx: addition of num_faces
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// tilemgr.cxx: minor tweaks
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//
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// Revision 1.13 1998/07/24 21:42:08 curt
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// material.cxx: whups, double method declaration with no definition.
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// obj.cxx: tweaks to avoid errors in SGI's CC.
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// tile.cxx: optimizations by Norman Vine.
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// tilemgr.cxx: optimizations by Norman Vine.
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//
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// Revision 1.12 1998/07/22 21:41:42 curt
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// Add basic fgFACE methods contributed by Charlie Hotchkiss.
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// intersect optimization from Norman Vine.
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//
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// Revision 1.11 1998/07/12 03:18:28 curt
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// Added ground collision detection. This involved:
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// - saving the entire vertex list for each tile with the tile records.
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// - saving the face list for each fragment with the fragment records.
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// - code to intersect the current vertical line with the proper face in
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// an efficient manner as possible.
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// Fixed a bug where the tiles weren't being shifted to "near" (0,0,0)
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//
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// Revision 1.10 1998/07/08 14:47:22 curt
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// Fix GL_MODULATE vs. GL_DECAL problem introduced by splash screen.
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// polare3d.h renamed to polar3d.hxx
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// fg{Cartesian,Polar}Point3d consolodated.
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// Added some initial support for calculating local current ground elevation.
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//
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// Revision 1.9 1998/07/06 21:34:34 curt
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// Added using namespace std for compilers that support this.
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//
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// Revision 1.8 1998/07/04 00:54:30 curt
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// Added automatic mipmap generation.
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//
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// When rendering fragments, use saved model view matrix from associated tile
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// rather than recalculating it with push() translate() pop().
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//
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// Revision 1.7 1998/06/12 00:58:05 curt
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// Build only static libraries.
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// Declare memmove/memset for Sloaris.
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//
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// Revision 1.6 1998/06/08 17:57:54 curt
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// Working first pass at material proporty sorting.
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//
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// Revision 1.5 1998/06/06 01:09:32 curt
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// I goofed on the log message in the last commit ... now fixed.
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//
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// Revision 1.4 1998/06/06 01:07:18 curt
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// Increased per material fragment list size from 100 to 400.
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// Now correctly draw viewable fragments in per material order.
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//
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// Revision 1.3 1998/06/05 22:39:54 curt
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// Working on sorting by, and rendering by material properties.
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//
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// Revision 1.2 1998/06/03 00:47:50 curt
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// No .h for STL includes.
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// Minor view culling optimizations.
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//
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// Revision 1.1 1998/05/23 14:09:21 curt
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// Added tile.cxx and tile.hxx.
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// Working on rewriting the tile management system so a tile is just a list
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// fragments, and the fragment record contains the display list for that fragment.
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//
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