From: curt Date: Fri, 11 Jul 1997 01:29:58 +0000 (+0000) Subject: More tweaking of terrian floor. X-Git-Url: https://git.mxchange.org/?a=commitdiff_plain;h=5667631a4530ba8fd74f3dc3c0584bcc01db358d;p=flightgear.git More tweaking of terrian floor. --- diff --git a/Main/GLmain.c b/Main/GLmain.c index 2d3ad518e..652c1d40e 100644 --- a/Main/GLmain.c +++ b/Main/GLmain.c @@ -193,9 +193,9 @@ static void fgUpdateViewParams() { printf("View pos = %.4f, %.4f, %.4f\n", view_pos.y, view_pos.z, FG_Altitude * FEET_TO_METER); - gluLookAt(view_pos.y, view_pos.z, (FG_Altitude+3.0)*FEET_TO_METER * 0.0011, + gluLookAt(view_pos.y, view_pos.z, FG_Altitude*FEET_TO_METER * 0.0011, view_pos.y + fwrd_view[0], view_pos.z + fwrd_view[1], - (FG_Altitude+3.0)*FEET_TO_METER * 0.001 + fwrd_view[2], + FG_Altitude*FEET_TO_METER * 0.001 + fwrd_view[2], up[0], up[1], up[2]); glLightfv( GL_LIGHT0, GL_POSITION, sun_vec ); @@ -410,7 +410,7 @@ static void fgMainLoop( void ) { /* now set aircraft altitude above ground */ FG_Altitude = rough_elev * METER_TO_FEET + 3.758099; - printf("<*> reseting altitude to %.0f meters\n", + printf("<*> resetting altitude to %.0f meters\n", FG_Altitude * FEET_TO_METER); } } @@ -498,7 +498,8 @@ int main( int argc, char *argv[] ) { FG_Longitude = ( -398391.28 / 3600.0 ) * DEG_TO_RAD; /* FG_Latitude = 0.0; FG_Longitude = 0.0; */ - FG_Altitude = FG_Runway_altitude + 3.758099; + FG_Altitude = FG_Runway_altitude + 3.758099; + FG_Altitude = 15000.0; printf("Initial position is: (%.4f, %.4f, %.2f)\n", FG_Latitude, FG_Longitude, FG_Altitude); @@ -548,7 +549,7 @@ int main( int argc, char *argv[] ) { * eventually */ rough_elev = mesh_altitude(FG_Longitude * RAD_TO_DEG * 3600.0, FG_Latitude * RAD_TO_DEG * 3600.0); - printf("Ground elevation is about %.2f meters here.\n", rough_elev); + printf("Ground elevation is %.2f meters here.\n", rough_elev); FG_Runway_altitude = rough_elev * METER_TO_FEET; if ( FG_Altitude < FG_Runway_altitude ) { @@ -610,12 +611,15 @@ int main( int argc, char *argv[] ) { /* $Log$ -/* Revision 1.30 1997/07/10 04:26:37 curt -/* We now can interpolated ground elevation for any position in the grid. We -/* can use this to enforce a "hard" ground. We still need to enforce some -/* bounds checking so that we don't try to lookup data points outside the -/* grid data set. +/* Revision 1.31 1997/07/11 01:29:58 curt +/* More tweaking of terrian floor. /* + * Revision 1.30 1997/07/10 04:26:37 curt + * We now can interpolated ground elevation for any position in the grid. We + * can use this to enforce a "hard" ground. We still need to enforce some + * bounds checking so that we don't try to lookup data points outside the + * grid data set. + * * Revision 1.29 1997/07/09 21:31:12 curt * Working on making the ground "hard." * diff --git a/Main/mesh2GL.c b/Main/mesh2GL.c index 1bf6b2484..8d41c51dc 100644 --- a/Main/mesh2GL.c +++ b/Main/mesh2GL.c @@ -28,6 +28,7 @@ #include "../constants.h" #include "../Scenery/mesh.h" +#include "../Scenery/scenery.h" #include "../Math/mat3.h" #include "../Math/polar.h" @@ -47,7 +48,7 @@ GLint mesh2GL(struct mesh *m) { printf("In mesh2GL(), generating GL call list.\n"); - istep = jstep = 10; /* Detail level 1 -- 1200 ... */ + istep = jstep = cur_scenery_params.terrain_skip ; /* Detail level */ /* setup the batch transformation */ fgRotateBatchInit(-m->originx * ARCSEC_TO_RAD, -m->originy * ARCSEC_TO_RAD); @@ -132,12 +133,15 @@ GLint mesh2GL(struct mesh *m) { /* $Log$ -/* Revision 1.28 1997/07/10 04:26:37 curt -/* We now can interpolated ground elevation for any position in the grid. We -/* can use this to enforce a "hard" ground. We still need to enforce some -/* bounds checking so that we don't try to lookup data points outside the -/* grid data set. +/* Revision 1.29 1997/07/11 01:29:58 curt +/* More tweaking of terrian floor. /* + * Revision 1.28 1997/07/10 04:26:37 curt + * We now can interpolated ground elevation for any position in the grid. We + * can use this to enforce a "hard" ground. We still need to enforce some + * bounds checking so that we don't try to lookup data points outside the + * grid data set. + * * Revision 1.27 1997/07/09 21:31:13 curt * Working on making the ground "hard." * diff --git a/Scenery/mesh.c b/Scenery/mesh.c index 0003c5b52..de1f149c5 100644 --- a/Scenery/mesh.c +++ b/Scenery/mesh.c @@ -31,6 +31,7 @@ #include +#include "scenery.h" #include "mesh.h" #include "common.h" @@ -158,7 +159,9 @@ double mesh_altitude(double lon, double lat) { double xlocal, ylocal, dx, dy, zA, zB, elev; int x1, y1, z1, x2, y2, z2, x3, y3, z3; int xindex, yindex; + int skip; + skip = cur_scenery_params.terrain_skip; /* determine if we are in the lower triangle or the upper triangle ______ | /| @@ -170,84 +173,91 @@ double mesh_altitude(double lon, double lat) { then calculate our end points */ - xlocal = ( lon - eg.originx ) / eg.col_step; - ylocal = ( lat - eg.originy ) / eg.row_step; + xlocal = (lon - eg.originx) / eg.col_step; + ylocal = (lat - eg.originy) / eg.row_step; - xindex = (int)xlocal; - yindex = (int)ylocal; + xindex = (int)(xlocal / skip) * skip; + yindex = (int)(ylocal / skip) * skip; + + if ( (xindex < 0) || (xindex + skip >= eg.cols) || + (yindex < 0) || (yindex + skip >= eg.rows) ) { + return(-9999); + } dx = xlocal - xindex; dy = ylocal - yindex; if ( dx > dy ) { /* lower triangle */ - printf(" Lower triangle\n"); + /* printf(" Lower triangle\n"); */ x1 = xindex; y1 = yindex; z1 = eg.mesh_data[x1 * eg.rows + y1]; - x2 = xindex + eg.col_step; + x2 = xindex + skip; y2 = yindex; z2 = eg.mesh_data[x2 * eg.rows + y2]; - x3 = xindex + eg.col_step; - y3 = yindex + eg.row_step; + x3 = xindex + skip; + y3 = yindex + skip; z3 = eg.mesh_data[x3 * eg.rows + y3]; + /* printf(" dx = %.2f dy = %.2f\n", dx, dy); printf(" (x1,y1,z1) = (%d,%d,%d)\n", x1, y1, z1); printf(" (x2,y2,z2) = (%d,%d,%d)\n", x2, y2, z2); - printf(" (x3,y3,z3) = (%d,%d,%d)\n", x3, y3, z3); + printf(" (x3,y3,z3) = (%d,%d,%d)\n", x3, y3, z3); */ - zA = dx * (z2 - z1) / eg.col_step + z1; - zB = dx * (z3 - z1) / eg.col_step + z1; + zA = dx * (z2 - z1) / skip + z1; + zB = dx * (z3 - z1) / skip + z1; - printf(" zA = %.2f zB = %.2f\n", zA, zB); + /* printf(" zA = %.2f zB = %.2f\n", zA, zB); */ - elev = dy * (zB - zA) * eg.col_step / (eg.row_step * dx) + zA; + elev = dy * (zB - zA) / dx + zA; } else { /* upper triangle */ - printf(" Upper triangle\n"); + /* printf(" Upper triangle\n"); */ x1 = xindex; y1 = yindex; z1 = eg.mesh_data[x1 * eg.rows + y1]; x2 = xindex; - y2 = yindex + eg.row_step; + y2 = yindex + skip; z2 = eg.mesh_data[x2 * eg.rows + y2]; - x3 = xindex + eg.col_step; - y3 = yindex + eg.row_step; + x3 = xindex + skip; + y3 = yindex + skip; z3 = eg.mesh_data[x3 * eg.rows + y3]; + /* printf(" dx = %.2f dy = %.2f\n", dx, dy); printf(" (x1,y1,z1) = (%d,%d,%d)\n", x1, y1, z1); printf(" (x2,y2,z2) = (%d,%d,%d)\n", x2, y2, z2); - printf(" (x3,y3,z3) = (%d,%d,%d)\n", x3, y3, z3); + printf(" (x3,y3,z3) = (%d,%d,%d)\n", x3, y3, z3); */ - zA = dy * (z2 - z1) / eg.row_step + z1; - zB = dy * (z3 - z1) / eg.row_step + z1; + zA = dy * (z2 - z1) / skip + z1; + zB = dy * (z3 - z1) / skip + z1; - printf(" zA = %.2f zB = %.2f\n", zA, zB ); - printf(" dx = %.2f xB - xA = %.2f\n", dx, - eg.col_step * dy / eg.row_step); + /* printf(" zA = %.2f zB = %.2f\n", zA, zB ); + printf(" xB - xA = %.2f\n", eg.col_step * dy / eg.row_step); */ - elev = dx * (zB - zA) * eg.row_step / (eg.col_step * dy) + zA; + elev = dx * (zB - zA) / dy + zA; } - printf("Our true ground elevation is %.2f\n", elev); - return(elev); } /* $Log$ -/* Revision 1.10 1997/07/10 04:26:38 curt -/* We now can interpolated ground elevation for any position in the grid. We -/* can use this to enforce a "hard" ground. We still need to enforce some -/* bounds checking so that we don't try to lookup data points outside the -/* grid data set. +/* Revision 1.11 1997/07/11 01:30:02 curt +/* More tweaking of terrian floor. /* + * Revision 1.10 1997/07/10 04:26:38 curt + * We now can interpolated ground elevation for any position in the grid. We + * can use this to enforce a "hard" ground. We still need to enforce some + * bounds checking so that we don't try to lookup data points outside the + * grid data set. + * * Revision 1.9 1997/07/10 02:22:10 curt * Working on terrain elevation interpolation routine. * diff --git a/Scenery/scenery.c b/Scenery/scenery.c index d40cd3724..00e032791 100644 --- a/Scenery/scenery.c +++ b/Scenery/scenery.c @@ -34,9 +34,14 @@ GLint mesh_hack; +/* Shared structure to hold current scenery parameters */ +struct scenery_params cur_scenery_params; + + /* Initialize the Scenery Management system */ void fgSceneryInit() { - /* nothing to do here yet */ + /* set the default terrain detail level */ + cur_scenery_params.terrain_skip = 10; } @@ -60,9 +65,12 @@ void fgSceneryRender() { /* $Log$ -/* Revision 1.3 1997/06/29 21:16:50 curt -/* More twiddling with the Scenery Management system. +/* Revision 1.4 1997/07/11 01:30:03 curt +/* More tweaking of terrian floor. /* + * Revision 1.3 1997/06/29 21:16:50 curt + * More twiddling with the Scenery Management system. + * * Revision 1.2 1997/06/27 20:03:37 curt * Working on Makefile structure. * diff --git a/Scenery/scenery.h b/Scenery/scenery.h index 2acf6472f..d9dbae346 100644 --- a/Scenery/scenery.h +++ b/Scenery/scenery.h @@ -28,6 +28,14 @@ #define SCENERY_H +/* Define a structure containing global scenery parameters */ +struct scenery_params { + int terrain_skip; /* number of terrain data points to skip */ +}; + +extern struct scenery_params cur_scenery_params; + + /* Initialize the Scenery Management system */ void fgSceneryInit(); @@ -43,9 +51,12 @@ void fgSceneryRender(); /* $Log$ -/* Revision 1.5 1997/06/26 22:14:57 curt -/* Beginning work on a scenery management system. +/* Revision 1.6 1997/07/11 01:30:03 curt +/* More tweaking of terrian floor. /* + * Revision 1.5 1997/06/26 22:14:57 curt + * Beginning work on a scenery management system. + * * Revision 1.4 1997/06/21 17:57:21 curt * directory shuffling ... *