Incorporated mesh2GL.c into Scenery/mesh.c
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1 changed files with 0 additions and 346 deletions
346
Main/mesh2GL.c
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Main/mesh2GL.c
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/**************************************************************************
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* mesh2GL.c -- walk through a mesh data structure and make GL calls
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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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#ifdef WIN32
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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 "../constants.h"
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#include "../Scenery/mesh.h"
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#include "../Scenery/scenery.h"
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#include "../Math/fg_geodesy.h"
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#include "../Math/fg_random.h"
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#include "../Math/mat3.h"
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#include "../Math/polar.h"
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/* The following routine is a real hack used for testing puposes only
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* and should probably be removed. */
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/* void mesh_make_test_object(double lon, double lat) {
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struct fgCartesianPoint origin;
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double elev;
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double b = 0.10;
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double h = 0.50;
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static GLfloat color[4] = { 1.0, 0.25, 0.25, 1.0 };
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glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, color );
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elev = mesh_altitude(lon, lat) * 0.001;
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printf("Elevation of test structure is: %.2f\n", elev);
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printf("Center of structure geodetic: (%.2f, %.2f\n", lon, lat);
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origin = fgGeodetic2Cartesian(lon*ARCSEC_TO_RAD, lat*ARCSEC_TO_RAD);
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printf("Center (unit circle) is (%.8f, %.8f, %.8f)\n", origin.x, origin.y,
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origin.z);
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origin = fgRotateCartesianPoint(origin);
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printf("Center of structure is: (%.4f, %.4f\n", origin.y, origin.z);
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glBegin(GL_TRIANGLES);
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glVertex3d(origin.y - b, origin.z - b, elev);
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glVertex3d(origin.y + b, origin.z - b, elev);
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glVertex3d(origin.y, origin.z, elev+h);
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glVertex3d(origin.y + b, origin.z - b, elev);
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glVertex3d(origin.y + b, origin.z + b, elev);
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glVertex3d(origin.y, origin.z, elev+h);
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glVertex3d(origin.y + b, origin.z + b, elev);
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glVertex3d(origin.y - b, origin.z + b, elev);
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glVertex3d(origin.y, origin.z, elev+h);
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glVertex3d(origin.y - b, origin.z + b, elev);
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glVertex3d(origin.y - b, origin.z - b, elev);
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glVertex3d(origin.y, origin.z, elev+h);
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glEnd();
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} */
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/* walk through mesh and make ogl calls */
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GLint mesh2GL(struct mesh *m) {
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GLint mesh;
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/* static GLfloat color[4] = { 0.5, 0.4, 0.25, 1.0 }; */ /* dark desert */
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static GLfloat color[4] = { 0.5, 0.5, 0.25, 1.0 };
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double randx, randy;
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float x1, y1, x2, y2, z11, z12, z21, z22;
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struct fgCartesianPoint p11, p12, p21, p22;
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double gc_lon, gc_lat, sl_radius;
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MAT3vec v1, v2, normal;
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int i, j, istep, jstep, iend, jend;
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float temp;
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printf("In mesh2GL(), generating GL call list.\n");
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/* Detail level. This is how big a step we take as we walk
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* through the DEM data set. This value is initialized in
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* .../Scenery/scenery.c:fgSceneryInit() */
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istep = jstep = cur_scenery_params.terrain_skip ;
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mesh = glGenLists(1);
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glNewList(mesh, GL_COMPILE);
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glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, color );
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iend = m->cols - 1;
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jend = m->rows - 1;
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y1 = m->originy;
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y2 = y1 + (m->col_step * istep);
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for ( i = 0; i < iend; i += istep ) {
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x1 = m->originx;
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x2 = x1 + (m->row_step * jstep);
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glBegin(GL_TRIANGLE_STRIP);
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for ( j = 0; j < jend; j += jstep ) {
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z11 = m->mesh_data[i * m->cols + j ];
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z12 = m->mesh_data[(i+istep) * m->cols + j ];
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z21 = m->mesh_data[i * m->cols + (j+jstep)];
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z22 = m->mesh_data[(i+istep) * m->cols + (j+jstep)];
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/* printf("A geodetic point is (%.2f, %.2f, %.2f)\n",
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x1, y1, z11); */
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gc_lon = x1*ARCSEC_TO_RAD;
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fgGeodToGeoc(y1*ARCSEC_TO_RAD, z11, &sl_radius, &gc_lat);
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/* printf("A geocentric point is (%.2f, %.2f, %.2f)\n", gc_lon,
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gc_lat, sl_radius+z11); */
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p11 = fgPolarToCart(gc_lon, gc_lat, sl_radius+z11);
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/* printf("A cart point is (%.8f, %.8f, %.8f)\n",
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p11.x, p11.y, p11.z); */
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gc_lon = x1*ARCSEC_TO_RAD;
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fgGeodToGeoc(y2*ARCSEC_TO_RAD, z12, &sl_radius, &gc_lat);
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p12 = fgPolarToCart(gc_lon, gc_lat, sl_radius+z12);
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gc_lon = x2*ARCSEC_TO_RAD;
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fgGeodToGeoc(y1*ARCSEC_TO_RAD, z21, &sl_radius, &gc_lat);
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p21 = fgPolarToCart(gc_lon, gc_lat, sl_radius+z21);
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gc_lon = x2*ARCSEC_TO_RAD;
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fgGeodToGeoc(y2*ARCSEC_TO_RAD, z22, &sl_radius, &gc_lat);
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p22 = fgPolarToCart(gc_lon, gc_lat, sl_radius+z22);
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v1[0] = p22.y - p11.y; v1[1] = p22.z - p11.z; v1[2] = z22 - z11;
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v2[0] = p12.y - p11.y; v2[1] = p12.z - p11.z; v2[2] = z12 - z11;
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MAT3cross_product(normal, v1, v2);
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MAT3_NORMALIZE_VEC(normal,temp);
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glNormal3d(normal[0], normal[1], normal[2]);
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/* printf("normal 1 = (%.2f %.2f %.2f\n", normal[0], normal[1],
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normal[2]); */
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if ( j == 0 ) {
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/* first time through */
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glVertex3d(p12.x, p12.y, p12.z);
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glVertex3d(p11.x, p11.y, p11.z);
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}
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glVertex3d(p22.x, p22.y, p22.z);
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v2[0] = p21.y - p11.y; v2[1] = p21.z - p11.z; v2[2] = z21 - z11;
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MAT3cross_product(normal, v2, v1);
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MAT3_NORMALIZE_VEC(normal,temp);
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glNormal3d(normal[0], normal[1], normal[2]);
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/* printf("normal 2 = (%.2f %.2f %.2f\n", normal[0], normal[1],
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normal[2]); */
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glVertex3d(p21.x, p21.y, p21.z);
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x1 += m->row_step * jstep;
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x2 += m->row_step * jstep;
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}
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glEnd();
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y1 += m->col_step * istep;
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y2 += m->col_step * istep;
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}
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/* this will go, it's only here for testing/debugging */
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for ( i = 0; i < 200; i++ ) {
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randx = fg_random() * 3600.0;
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randy = fg_random() * 3600.0;
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/* mesh_make_test_object(m->originx + randx, m->originy + randy); */
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}
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glEndList();
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return(mesh);
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}
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/* $Log$
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/* Revision 1.41 1997/07/31 22:52:40 curt
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/* Working on redoing internal coordinate systems & scenery transformations.
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/*
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* Revision 1.40 1997/07/30 16:12:43 curt
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* Moved fg_random routines from Util/ to Math/
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*
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* Revision 1.39 1997/07/21 21:20:48 curt
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* Twiddled with random object placement.
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*
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* Revision 1.38 1997/07/21 14:45:02 curt
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* Minor tweaks.
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*
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* Revision 1.37 1997/07/19 22:34:03 curt
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* Moved PI definitions to ../constants.h
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* Moved random() stuff to ../Utils/ and renamed fg_random()
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*
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* Revision 1.36 1997/07/18 23:41:25 curt
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* Tweaks for building with Cygnus Win32 compiler.
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*
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* Revision 1.35 1997/07/18 14:28:35 curt
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* Hacked in some support for wind/turbulence.
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*
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* Revision 1.34 1997/07/16 20:04:50 curt
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* Minor tweaks to aid Win32 port.
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*
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* Revision 1.33 1997/07/14 16:26:04 curt
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* Testing/playing -- placed objects randomly across the entire terrain.
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*
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* Revision 1.32 1997/07/12 03:50:21 curt
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* Added an #include <Windows32/Base.h> to help compiling for Win32
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*
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* Revision 1.31 1997/07/12 02:27:07 curt
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* Looking at potential scenery transformation/coordinate system problems.
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*
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* Revision 1.30 1997/07/11 03:23:18 curt
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* Solved some scenery display/orientation problems. Still have a positioning
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* (or transformation?) problem.
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*
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* Revision 1.29 1997/07/11 01:29:58 curt
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* More tweaking of terrian floor.
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*
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* Revision 1.28 1997/07/10 04:26:37 curt
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* We now can interpolated ground elevation for any position in the grid. We
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* can use this to enforce a "hard" ground. We still need to enforce some
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* bounds checking so that we don't try to lookup data points outside the
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* grid data set.
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*
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* Revision 1.27 1997/07/09 21:31:13 curt
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* Working on making the ground "hard."
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*
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* Revision 1.26 1997/07/08 18:20:13 curt
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* Working on establishing a hard ground.
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*
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* Revision 1.25 1997/07/07 20:59:50 curt
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* Working on scenery transformations to enable us to fly fluidly over the
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* poles with no discontinuity/distortion in scenery.
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*
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* Revision 1.24 1997/07/05 20:43:35 curt
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* renamed mat3 directory to Math so we could add other math related routines.
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*
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* Revision 1.23 1997/07/03 00:51:14 curt
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* Playing with terrain color.
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*
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* Revision 1.22 1997/06/29 21:19:17 curt
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* Working on scenery management system.
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*
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* Revision 1.21 1997/06/21 17:12:54 curt
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* Capitalized subdirectory names.
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*
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* Revision 1.20 1997/06/18 04:10:32 curt
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* A couple more runway tweaks ...
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*
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* Revision 1.19 1997/06/18 02:21:24 curt
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* Hacked in a runway
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*
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* Revision 1.18 1997/06/17 04:19:17 curt
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* More timer related tweaks with respect to view direction changes.
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*
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* Revision 1.17 1997/06/16 19:32:52 curt
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* Starting to add general timer support.
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*
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* Revision 1.16 1997/06/02 03:40:07 curt
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* A tiny bit more view tweaking.
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*
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* Revision 1.15 1997/06/02 03:01:38 curt
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* Working on views (side, front, back, transitions, etc.)
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*
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* Revision 1.14 1997/05/31 19:16:26 curt
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* Elevator trim added.
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*
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* Revision 1.13 1997/05/31 04:13:53 curt
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* WE CAN NOW FLY!!!
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*
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* Continuing work on the LaRCsim flight model integration.
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* Added some MSFS-like keyboard input handling.
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*
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* Revision 1.12 1997/05/30 23:26:20 curt
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* Added elevator/aileron controls.
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*
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* Revision 1.11 1997/05/30 19:27:02 curt
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* The LaRCsim flight model is starting to look like it is working.
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*
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* Revision 1.10 1997/05/30 03:54:11 curt
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* Made a bit more progress towards integrating the LaRCsim flight model.
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*
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* Revision 1.9 1997/05/29 22:39:51 curt
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* Working on incorporating the LaRCsim flight model.
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*
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* Revision 1.8 1997/05/29 12:31:40 curt
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* Minor tweaks, moving towards general flight model integration.
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*
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* Revision 1.7 1997/05/29 02:33:24 curt
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* Updated to reflect changing interfaces in other "modules."
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*
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* Revision 1.6 1997/05/27 17:44:32 curt
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* Renamed & rearranged variables and routines. Added some initial simple
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* timer/alarm routines so the flight model can be updated on a regular
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* interval.
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*
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* Revision 1.5 1997/05/24 01:45:32 curt
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* Fixed surface normals for triangle mesh.
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*
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* Revision 1.4 1997/05/23 20:05:24 curt
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* First stab at using GL_TRIANGLE_STRIP's instead of GL_POLYGONS (to conserve
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* memory)
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*
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* Revision 1.3 1997/05/23 15:40:26 curt
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* Added GNU copyright headers.
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* Fog now works!
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*
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* Revision 1.2 1997/05/23 00:35:13 curt
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* Trying to get fog to work ...
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*
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* Revision 1.1 1997/05/21 15:57:52 curt
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* Renamed due to added GLUT support.
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*
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* Revision 1.3 1997/05/19 18:22:42 curt
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* Parameter tweaking ... starting to stub in fog support.
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*
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* Revision 1.2 1997/05/17 00:17:35 curt
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* Trying to stub in support for standard OpenGL.
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*
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* Revision 1.1 1997/05/16 16:05:52 curt
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* Initial revision.
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*
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*/
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