**************************************************************************/
-#include <malloc.h>
+#ifndef __CYGWIN32__
+# include <malloc.h>
+#endif
+
+#ifdef WIN32
+# include <windows.h>
+#endif
+
#include <stdio.h>
#include <stdlib.h> /* atof(), atoi() */
#include <string.h>
#include <GL/glut.h>
-#include "mesh.h"
-#include "common.h"
+#include <Include/constants.h>
+#include <Include/types.h>
+#include <Math/fg_geodesy.h>
+#include <Math/fg_random.h>
+#include <Math/mat3.h>
+#include <Math/polar.h>
+
+#include <Scenery/mesh.h>
+#include <Scenery/common.h>
+#include <Scenery/scenery.h>
/* Temporary hack until we get the scenery management system running */
-extern GLint mesh_hack;
-extern struct mesh eg;
+extern GLint area_terrain;
+extern struct MESH eg;
/* initialize the non-array mesh values */
-void mesh_init(struct mesh *m) {
+void mesh_init(struct MESH *m) {
m->originx = 0.0;
m->originy = 0.0;
/* return a pointer to a new mesh structure (no data array allocated yet) */
-struct mesh *(new_mesh)() {
- struct mesh *mesh_ptr;
+struct MESH *(new_mesh)( void ) {
+ struct MESH *mesh_ptr;
- mesh_ptr = (struct mesh *)malloc(sizeof(struct mesh));
+ mesh_ptr = (struct MESH *)malloc(sizeof(struct MESH));
if ( mesh_ptr == 0 ) {
printf("Virtual memory exceeded\n");
/* set the option name in the mesh data structure */
-void mesh_set_option_name(struct mesh *m, char *name) {
+void mesh_set_option_name(struct MESH *m, char *name) {
if ( strlen(name) < MAX_IDENT_LEN ) {
strcpy(m->option_name, name);
} else {
/* set an option value in the mesh data structure */
-void mesh_set_option_value(struct mesh *m, char *value) {
+void mesh_set_option_value(struct MESH *m, char *value) {
/* printf("Setting %s to %s\n", m->option_name, value); */
if ( m->do_data ) {
/* mesh data is a pseudo 2d array */
/* printf("Setting mesh_data[%d][%d] to %s\n", m->cur_row, m->cur_col,
value); */
- m->mesh_data[m->cur_row * m->rows + m->cur_col] = atof(value);
+ m->mesh_data[m->cur_row * m->cols + m->cur_col] = atof(value);
m->cur_col++;
if ( m->cur_col >= m->cols ) {
m->cur_col = 0;
/* do whatever needs to be done with the mesh now that it's been
loaded, such as generating the OpenGL call list. */
-void mesh_do_it(struct mesh *m) {
- mesh_hack = mesh2GL(m);
+void mesh_do_it(struct MESH *m) {
+ area_terrain = mesh_to_OpenGL(m);
}
double xlocal, ylocal, dx, dy, zA, zB, elev;
int x1, y1, z1, x2, y2, z2, x3, y3, z3;
int xindex, yindex;
+ int skip;
+ skip = scenery.terrain_skip;
/* determine if we are in the lower triangle or the upper triangle
______
| /|
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];
+ z1 = eg.mesh_data[y1 * eg.cols + x1];
- x2 = xindex + eg.col_step;
+ x2 = xindex + skip;
y2 = yindex;
- z2 = eg.mesh_data[x2 * eg.rows + y2];
+ z2 = eg.mesh_data[y2 * eg.cols + x2];
- x3 = xindex + eg.col_step;
- y3 = yindex + eg.row_step;
- z3 = eg.mesh_data[x3 * eg.rows + y3];
+ x3 = xindex + skip;
+ y3 = yindex + skip;
+ z3 = eg.mesh_data[y3 * eg.cols + x3];
+ /* 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;
+ if ( dx > FG_EPSILON ) {
+ elev = dy * (zB - zA) / dx + zA;
+ } else {
+ elev = zA;
+ }
} else {
/* upper triangle */
- printf(" Upper triangle\n");
+ /* printf(" Upper triangle\n"); */
x1 = xindex;
y1 = yindex;
- z1 = eg.mesh_data[x1 * eg.rows + y1];
+ z1 = eg.mesh_data[y1 * eg.cols + x1];
x2 = xindex;
- y2 = yindex + eg.row_step;
- z2 = eg.mesh_data[x2 * eg.rows + y2];
+ y2 = yindex + skip;
+ z2 = eg.mesh_data[y2 * eg.cols + x2];
- x3 = xindex + eg.col_step;
- y3 = yindex + eg.row_step;
- z3 = eg.mesh_data[x3 * eg.rows + y3];
+ x3 = xindex + skip;
+ y3 = yindex + skip;
+ z3 = eg.mesh_data[y3 * eg.cols + x3];
+ /* 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;
+ if ( dy > FG_EPSILON ) {
+ elev = dx * (zB - zA) / dy + zA;
+ } else {
+ elev = zA;
+ }
}
- printf("Our true ground elevation is %.2f\n", elev);
-
return(elev);
}
+/* walk through mesh and make opengl calls */
+GLint mesh_to_OpenGL(struct MESH *m) {
+ GLint mesh;
+ /* static GLfloat color[4] = { 0.5, 0.4, 0.25, 1.0 }; */ /* dark desert */
+ /* static GLfloat color[4] = { 0.5, 0.5, 0.25, 1.0 }; */
+ static GLfloat color[4] = { 1.0, 0.0, 0.0, 1.0 };
+ double centerx, centery;
+ double randx, randy;
+
+ float x1, y1, x2, y2, z11, z12, z21, z22;
+ struct fgCartesianPoint p11, p12, p21, p22, c;
+ double gc_lon, gc_lat, sl_radius;
+
+ MAT3vec v1, v2, normal;
+ int i, j, istep, jstep, iend, jend;
+ float temp;
+
+ printf("In mesh2GL(), generating GL call list.\n");
+
+ /* Detail level. This is how big a step we take as we walk
+ * through the DEM data set. This value is initialized in
+ * .../Scenery/scenery.c:fgSceneryInit() */
+ istep = jstep = scenery.terrain_skip ;
+
+ centerx = m->originx + (m->rows * m->row_step) / 2.0;
+ centery = m->originy + (m->cols * m->col_step) / 2.0;
+ fgGeodToGeoc(centery*ARCSEC_TO_RAD, 0, &sl_radius, &gc_lat);
+ c = fgPolarToCart(centerx*ARCSEC_TO_RAD, gc_lat, sl_radius);
+ scenery.center = c;
+
+ mesh = glGenLists(1);
+ glNewList(mesh, GL_COMPILE);
+
+ /* glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, color ); */
+ glColor3fv(color);
+
+ iend = m->cols - 1;
+ jend = m->rows - 1;
+
+ y1 = m->originy;
+ y2 = y1 + (m->col_step * istep);
+
+ for ( i = 0; i < iend; i += istep ) {
+ x1 = m->originx;
+ x2 = x1 + (m->row_step * jstep);
+
+ glBegin(GL_TRIANGLE_STRIP);
+
+ for ( j = 0; j < jend; j += jstep ) {
+ z11 = m->mesh_data[i * m->cols + j ];
+ z12 = m->mesh_data[(i+istep) * m->cols + j ];
+ z21 = m->mesh_data[i * m->cols + (j+jstep)];
+ z22 = m->mesh_data[(i+istep) * m->cols + (j+jstep)];
+
+ /* printf("A geodetic point is (%.2f, %.2f, %.2f)\n",
+ x1, y1, z11); */
+ gc_lon = x1*ARCSEC_TO_RAD;
+ fgGeodToGeoc(y1*ARCSEC_TO_RAD, z11, &sl_radius, &gc_lat);
+ /* printf("A geocentric point is (%.2f, %.2f, %.2f)\n", gc_lon,
+ gc_lat, sl_radius+z11); */
+ p11 = fgPolarToCart(gc_lon, gc_lat, sl_radius+z11);
+ /* printf("A cart point is (%.8f, %.8f, %.8f)\n",
+ p11.x, p11.y, p11.z); */
+
+ gc_lon = x1*ARCSEC_TO_RAD;
+ fgGeodToGeoc(y2*ARCSEC_TO_RAD, z12, &sl_radius, &gc_lat);
+ p12 = fgPolarToCart(gc_lon, gc_lat, sl_radius+z12);
+
+ gc_lon = x2*ARCSEC_TO_RAD;
+ fgGeodToGeoc(y1*ARCSEC_TO_RAD, z21, &sl_radius, &gc_lat);
+ p21 = fgPolarToCart(gc_lon, gc_lat, sl_radius+z21);
+
+ gc_lon = x2*ARCSEC_TO_RAD;
+ fgGeodToGeoc(y2*ARCSEC_TO_RAD, z22, &sl_radius, &gc_lat);
+ p22 = fgPolarToCart(gc_lon, gc_lat, sl_radius+z22);
+
+ v1[0] = p22.y - p11.y; v1[1] = p22.z - p11.z; v1[2] = z22 - z11;
+ v2[0] = p12.y - p11.y; v2[1] = p12.z - p11.z; v2[2] = z12 - z11;
+ MAT3cross_product(normal, v1, v2);
+ MAT3_NORMALIZE_VEC(normal,temp);
+ glNormal3d(normal[0], normal[1], normal[2]);
+ /* printf("normal 1 = (%.2f %.2f %.2f\n", normal[0], normal[1],
+ normal[2]); */
+
+ if ( j == 0 ) {
+ /* first time through */
+ glVertex3d(p12.x - c.x, p12.y - c.y, p12.z - c.z);
+ glVertex3d(p11.x - c.x, p11.y - c.y, p11.z - c.z);
+ }
+
+ glVertex3d(p22.x - c.x, p22.y - c.y, p22.z - c.z);
+
+ v2[0] = p21.y - p11.y; v2[1] = p21.z - p11.z; v2[2] = z21 - z11;
+ MAT3cross_product(normal, v2, v1);
+ MAT3_NORMALIZE_VEC(normal,temp);
+ glNormal3d(normal[0], normal[1], normal[2]);
+ /* printf("normal 2 = (%.2f %.2f %.2f\n", normal[0], normal[1],
+ normal[2]); */
+
+ glVertex3d(p21.x - c.x, p21.y - c.y, p21.z - c.z);
+
+ x1 += m->row_step * jstep;
+ x2 += m->row_step * jstep;
+ }
+ glEnd();
+
+ y1 += m->col_step * istep;
+ y2 += m->col_step * istep;
+ }
+
+ /* this will go, it's only here for testing/debugging */
+
+ for ( i = 0; i < 200; i++ ) {
+ randx = fg_random() * 3600.0;
+ randy = fg_random() * 3600.0;
+
+ /* mesh_make_test_object(m->originx + randx, m->originy + randy); */
+ }
+
+ glEndList();
+
+ return(mesh);
+}
+
+
/* $Log$
-/* 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 1.27 1998/01/19 19:27:15 curt
+/* Merged in make system changes from Bob Kuehne <rpk@sgi.com>
+/* This should simplify things tremendously.
/*
+ * Revision 1.26 1998/01/19 18:40:36 curt
+ * Tons of little changes to clean up the code and to remove fatal errors
+ * when building with the c++ compiler.
+ *
+ * Revision 1.25 1998/01/07 03:31:27 curt
+ * Miscellaneous tweaks.
+ *
+ * Revision 1.24 1997/12/15 23:54:59 curt
+ * Add xgl wrappers for debugging.
+ * Generate terrain normals on the fly.
+ *
+ * Revision 1.23 1997/10/30 12:38:44 curt
+ * Working on new scenery subsystem.
+ *
+ * Revision 1.22 1997/10/28 21:00:21 curt
+ * Changing to new terrain format.
+ *
+ * Revision 1.21 1997/08/27 03:30:27 curt
+ * Changed naming scheme of basic shared structures.
+ *
+ * Revision 1.20 1997/08/19 23:55:08 curt
+ * Worked on better simulating real lighting.
+ *
+ * Revision 1.19 1997/08/06 00:24:28 curt
+ * Working on correct real time sun lighting.
+ *
+ * Revision 1.18 1997/08/02 19:10:14 curt
+ * Incorporated mesh2GL.c into mesh.c
+ *
+ * Revision 1.17 1997/07/18 23:41:26 curt
+ * Tweaks for building with Cygnus Win32 compiler.
+ *
+ * Revision 1.16 1997/07/16 20:04:51 curt
+ * Minor tweaks to aid Win32 port.
+ *
+ * Revision 1.15 1997/07/14 16:26:04 curt
+ * Testing/playing -- placed objects randomly across the entire terrain.
+ *
+ * Revision 1.14 1997/07/12 04:01:14 curt
+ * Added #include <Windows32/Base.h> to help Win32 compiling.
+ *
+ * Revision 1.13 1997/07/12 02:27:11 curt
+ * Looking at potential scenery transformation/coordinate system problems.
+ *
+ * Revision 1.12 1997/07/11 03:23:19 curt
+ * Solved some scenery display/orientation problems. Still have a positioning
+ * (or transformation?) problem.
+ *
+ * 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.
*
projects / flightgear.git / blobdiff