91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
/**************************************************************************
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* mesh.h -- data structures and routines for processing terrain meshes
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*
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* Written by Curtis Olson, started May 1997.
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*
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* Copyright (C) 1997 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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**************************************************************************/
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#ifndef MESH_H
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#define MESH_H
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struct mesh {
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/* start coordinates (in arc seconds) */
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double originx, originy;
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/* number of rows and columns */
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int rows, cols;
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/* Distance between row and column data points (in arc seconds) */
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double row_step, col_step;
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/* pointer to the actual mesh data dynamically allocated */
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float *mesh_data;
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/* a temporary values for the parser to use */
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char option_name[32];
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int do_data;
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int cur_row, cur_col;
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};
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/* return a pointer to a new mesh structure (no data array allocated yet) */
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struct mesh *(new_mesh)();
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/* initialize the non-array mesh values */
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void mesh_init(struct mesh *m);
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/* return a pointer to a dynamically allocated array */
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float *(new_mesh_data)(int nrows, int ncols);
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/* set the option name in the mesh data structure */
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void mesh_set_option_name(struct mesh *m, char *name);
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/* set an option value in the mesh data structure */
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void mesh_set_option_value(struct mesh *m, char *value);
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/* do whatever needs to be done with the mesh now that it's been
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* loaded, such as generating the OpenGL call list. */
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void mesh_do_it(struct mesh *m);
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/* return the current altitude based on mesh data. We should rewrite
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* this to interpolate exact values, but for now this is good enough */
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double mesh_altitude(double lon, double lat);
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#endif MESH_H
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/* $Log$
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/* Revision 1.4 1997/07/08 18:20:14 curt
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/* Working on establishing a hard ground.
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/*
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* Revision 1.3 1997/06/22 21:44:41 curt
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* Working on intergrating the VRML (subset) parser.
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*
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* Revision 1.2 1997/05/23 15:40:42 curt
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* Added GNU copyright headers.
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*
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* Revision 1.1 1997/05/16 16:07:05 curt
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* Initial revision.
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*
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*/
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