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More tweaking of terrian floor.

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curt 1997-07-11 01:29:58 +00:00
parent 1f718dcc8f
commit 5667631a45
5 changed files with 89 additions and 52 deletions
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22
Main/GLmain.c
View file

@ -193,9 +193,9 @@ static void fgUpdateViewParams() {
printf("View pos = %.4f, %.4f, %.4f\n", view_pos.y, view_pos.z, printf("View pos = %.4f, %.4f, %.4f\n", view_pos.y, view_pos.z,
FG_Altitude * FEET_TO_METER); 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], 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]); up[0], up[1], up[2]);
glLightfv( GL_LIGHT0, GL_POSITION, sun_vec ); glLightfv( GL_LIGHT0, GL_POSITION, sun_vec );
@ -410,7 +410,7 @@ static void fgMainLoop( void ) {
/* now set aircraft altitude above ground */ /* now set aircraft altitude above ground */
FG_Altitude = rough_elev * METER_TO_FEET + 3.758099; 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); FG_Altitude * FEET_TO_METER);
} }
} }
@ -499,6 +499,7 @@ int main( int argc, char *argv[] ) {
/* FG_Latitude = 0.0; /* FG_Latitude = 0.0;
FG_Longitude = 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, printf("Initial position is: (%.4f, %.4f, %.2f)\n", FG_Latitude,
FG_Longitude, FG_Altitude); FG_Longitude, FG_Altitude);
@ -548,7 +549,7 @@ int main( int argc, char *argv[] ) {
* eventually */ * eventually */
rough_elev = mesh_altitude(FG_Longitude * RAD_TO_DEG * 3600.0, rough_elev = mesh_altitude(FG_Longitude * RAD_TO_DEG * 3600.0,
FG_Latitude * 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; FG_Runway_altitude = rough_elev * METER_TO_FEET;
if ( FG_Altitude < FG_Runway_altitude ) { if ( FG_Altitude < FG_Runway_altitude ) {
@ -610,12 +611,15 @@ int main( int argc, char *argv[] ) {
/* $Log$ /* $Log$
/* Revision 1.30 1997/07/10 04:26:37 curt /* Revision 1.31 1997/07/11 01:29:58 curt
/* We now can interpolated ground elevation for any position in the grid. We /* More tweaking of terrian floor.
/* 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 1.30 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 * Revision 1.29 1997/07/09 21:31:12 curt
* Working on making the ground "hard." * Working on making the ground "hard."
* *

16
Main/mesh2GL.c
View file

@ -28,6 +28,7 @@
#include "../constants.h" #include "../constants.h"
#include "../Scenery/mesh.h" #include "../Scenery/mesh.h"
#include "../Scenery/scenery.h"
#include "../Math/mat3.h" #include "../Math/mat3.h"
#include "../Math/polar.h" #include "../Math/polar.h"
@ -47,7 +48,7 @@ GLint mesh2GL(struct mesh *m) {
printf("In mesh2GL(), generating GL call list.\n"); 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 */ /* setup the batch transformation */
fgRotateBatchInit(-m->originx * ARCSEC_TO_RAD, -m->originy * ARCSEC_TO_RAD); fgRotateBatchInit(-m->originx * ARCSEC_TO_RAD, -m->originy * ARCSEC_TO_RAD);
@ -132,12 +133,15 @@ GLint mesh2GL(struct mesh *m) {
/* $Log$ /* $Log$
/* Revision 1.28 1997/07/10 04:26:37 curt /* Revision 1.29 1997/07/11 01:29:58 curt
/* We now can interpolated ground elevation for any position in the grid. We /* More tweaking of terrian floor.
/* 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 1.28 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 * Revision 1.27 1997/07/09 21:31:13 curt
* Working on making the ground "hard." * Working on making the ground "hard."
* *

72
Scenery/mesh.c
View file

@ -31,6 +31,7 @@
#include <GL/glut.h> #include <GL/glut.h>
#include "scenery.h"
#include "mesh.h" #include "mesh.h"
#include "common.h" #include "common.h"
@ -158,7 +159,9 @@ double mesh_altitude(double lon, double lat) {
double xlocal, ylocal, dx, dy, zA, zB, elev; double xlocal, ylocal, dx, dy, zA, zB, elev;
int x1, y1, z1, x2, y2, z2, x3, y3, z3; int x1, y1, z1, x2, y2, z2, x3, y3, z3;
int xindex, yindex; int xindex, yindex;
int skip;
skip = cur_scenery_params.terrain_skip;
/* determine if we are in the lower triangle or the upper triangle /* 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 then calculate our end points
*/ */
xlocal = ( lon - eg.originx ) / eg.col_step; xlocal = (lon - eg.originx) / eg.col_step;
ylocal = ( lat - eg.originy ) / eg.row_step; ylocal = (lat - eg.originy) / eg.row_step;
xindex = (int)xlocal; xindex = (int)(xlocal / skip) * skip;
yindex = (int)ylocal; yindex = (int)(ylocal / skip) * skip;
if ( (xindex < 0) || (xindex + skip >= eg.cols) ||
(yindex < 0) || (yindex + skip >= eg.rows) ) {
return(-9999);
}
dx = xlocal - xindex; dx = xlocal - xindex;
dy = ylocal - yindex; dy = ylocal - yindex;
if ( dx > dy ) { if ( dx > dy ) {
/* lower triangle */ /* lower triangle */
printf(" Lower triangle\n"); /* printf(" Lower triangle\n"); */
x1 = xindex; x1 = xindex;
y1 = yindex; y1 = yindex;
z1 = eg.mesh_data[x1 * eg.rows + y1]; z1 = eg.mesh_data[x1 * eg.rows + y1];
x2 = xindex + eg.col_step; x2 = xindex + skip;
y2 = yindex; y2 = yindex;
z2 = eg.mesh_data[x2 * eg.rows + y2]; z2 = eg.mesh_data[x2 * eg.rows + y2];
x3 = xindex + eg.col_step; x3 = xindex + skip;
y3 = yindex + eg.row_step; y3 = yindex + skip;
z3 = eg.mesh_data[x3 * eg.rows + y3]; 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(" (x1,y1,z1) = (%d,%d,%d)\n", x1, y1, z1);
printf(" (x2,y2,z2) = (%d,%d,%d)\n", x2, y2, z2); 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; zA = dx * (z2 - z1) / skip + z1;
zB = dx * (z3 - z1) / eg.col_step + 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 { } else {
/* upper triangle */ /* upper triangle */
printf(" Upper triangle\n"); /* printf(" Upper triangle\n"); */
x1 = xindex; x1 = xindex;
y1 = yindex; y1 = yindex;
z1 = eg.mesh_data[x1 * eg.rows + y1]; z1 = eg.mesh_data[x1 * eg.rows + y1];
x2 = xindex; x2 = xindex;
y2 = yindex + eg.row_step; y2 = yindex + skip;
z2 = eg.mesh_data[x2 * eg.rows + y2]; z2 = eg.mesh_data[x2 * eg.rows + y2];
x3 = xindex + eg.col_step; x3 = xindex + skip;
y3 = yindex + eg.row_step; y3 = yindex + skip;
z3 = eg.mesh_data[x3 * eg.rows + y3]; 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(" (x1,y1,z1) = (%d,%d,%d)\n", x1, y1, z1);
printf(" (x2,y2,z2) = (%d,%d,%d)\n", x2, y2, z2); 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; zA = dy * (z2 - z1) / skip + z1;
zB = dy * (z3 - z1) / eg.row_step + z1; zB = dy * (z3 - z1) / skip + z1;
printf(" zA = %.2f zB = %.2f\n", zA, zB ); /* printf(" zA = %.2f zB = %.2f\n", zA, zB );
printf(" dx = %.2f xB - xA = %.2f\n", dx, printf(" xB - xA = %.2f\n", eg.col_step * dy / eg.row_step); */
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); return(elev);
} }
/* $Log$ /* $Log$
/* Revision 1.10 1997/07/10 04:26:38 curt /* Revision 1.11 1997/07/11 01:30:02 curt
/* We now can interpolated ground elevation for any position in the grid. We /* More tweaking of terrian floor.
/* 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 1.10 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 * Revision 1.9 1997/07/10 02:22:10 curt
* Working on terrain elevation interpolation routine. * Working on terrain elevation interpolation routine.
* *

14
Scenery/scenery.c
View file

@ -34,9 +34,14 @@
GLint mesh_hack; GLint mesh_hack;
/* Shared structure to hold current scenery parameters */
struct scenery_params cur_scenery_params;
/* Initialize the Scenery Management system */ /* Initialize the Scenery Management system */
void fgSceneryInit() { 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() {
/* $Log$ /* $Log$
/* Revision 1.3 1997/06/29 21:16:50 curt /* Revision 1.4 1997/07/11 01:30:03 curt
/* More twiddling with the Scenery Management system. /* 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 * Revision 1.2 1997/06/27 20:03:37 curt
* Working on Makefile structure. * Working on Makefile structure.
* *

15
Scenery/scenery.h
View file

@ -28,6 +28,14 @@
#define SCENERY_H #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 */ /* Initialize the Scenery Management system */
void fgSceneryInit(); void fgSceneryInit();
@ -43,9 +51,12 @@ void fgSceneryRender();
/* $Log$ /* $Log$
/* Revision 1.5 1997/06/26 22:14:57 curt /* Revision 1.6 1997/07/11 01:30:03 curt
/* Beginning work on a scenery management system. /* 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 * Revision 1.4 1997/06/21 17:57:21 curt
* directory shuffling ... * directory shuffling ...
* *