* (Log is kept at end of this file)
**************************************************************************/
-
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
-#include <signal.h> /* for timer routines */
-#if defined(__WATCOMC__) || defined(__MSC__)
-# include <time.h>
-#else
-# include <sys/time.h>
-#endif
#ifdef GLUT
#include <GL/glut.h>
#include "GLTKkey.h"
#endif
-#include "../aircraft/aircraft.h"
-#include "../scenery/scenery.h"
+#include "../Aircraft/aircraft.h"
+#include "../Scenery/scenery.h"
#include "../mat3/mat3.h"
+#include "../Timer/fg_timer.h"
#define DEG_TO_RAD 0.017453292
#define RAD_TO_DEG 57.29577951
+#ifndef PI2
+#define PI2 (M_PI + M_PI)
+#endif
+
/* This is a record containing all the info for the aircraft currently
being operated */
struct aircraft_params current_aircraft;
GLint fgSceneryCompile();
static void fgSceneryDraw();
/* pointer to terrain mesh structure */
-static GLint mesh;
+static GLint terrain, runway;
/* Another hack */
double fogDensity = 2000.0;
+double view_offset = 0.0;
+double goal_view_offset = 0.0;
/* Another hack */
-#define DEFAULT_MODEL_HZ 20
+#define DEFAULT_TIMER_HZ 20
#define DEFAULT_MULTILOOP 6
+#define DEFAULT_MODEL_HZ (DEFAULT_TIMER_HZ * DEFAULT_MULTILOOP)
+
double Simtime;
+/* Another hack */
+int use_signals = 0;
+
/**************************************************************************
* fgInitVisuals() -- Initialize various GL/view parameters
static void fgInitVisuals() {
/* if the 4th field is 0.0, this specifies a direction ... */
- static GLfloat color[4] = { 0.3, 0.7, 0.2, 1.0 };
static GLfloat fogColor[4] = {0.65, 0.65, 0.85, 1.0};
glEnable( GL_DEPTH_TEST );
glEnable( GL_LIGHTING );
glEnable( GL_LIGHT0 );
- glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, color );
glShadeModel( GL_FLAT ); /* glShadeModel( GL_SMOOTH ); */
glEnable( GL_FOG );
static void fgUpdateViewParams() {
double pos_x, pos_y, pos_z;
struct flight_params *f;
- MAT3mat R, tmp;
- MAT3vec vec, forward, up;
+ MAT3mat R, TMP;
+ MAT3vec vec, up, forward, fwrd_view;
f = ¤t_aircraft.flight;
/* Tell GL we are about to modify the projection parameters */
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
- gluPerspective(45.0, 1.0/win_ratio, 1.0, 6000.0);
+ gluPerspective(45.0, 1.0/win_ratio, 0.01, 6000.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
pos_y = (FG_Latitude * RAD_TO_DEG) * 3600.0;
pos_z = FG_Altitude * 0.01; /* (Convert feet to aproximate arcsecs) */
+ printf("*** pos_z = %.2f\n", pos_z);
+
/* build current rotation matrix */
MAT3_SET_VEC(vec, 1.0, 0.0, 0.0);
MAT3rotate(R, vec, FG_Phi);
/* printf("Roll matrix\n"); */
/* MAT3print(R, stdout); */
- MAT3_SET_VEC(vec, 0.0, -1.0, 0.0);
- MAT3rotate(tmp, vec, FG_Theta);
+ MAT3_SET_VEC(vec, 0.0, 1.0, 0.0);
+ /* MAT3mult_vec(vec, vec, R); */
+ MAT3rotate(TMP, vec, -FG_Theta);
/* printf("Pitch matrix\n"); */
- /* MAT3print(tmp, stdout); */
- MAT3mult(R, R, tmp);
+ /* MAT3print(TMP, stdout); */
+ MAT3mult(R, R, TMP);
MAT3_SET_VEC(vec, 0.0, 0.0, -1.0);
- MAT3rotate(tmp, vec, M_PI + M_PI_2 + FG_Psi );
+ /* MAT3mult_vec(vec, vec, R); */
+ /* MAT3rotate(TMP, vec, M_PI + M_PI_2 + FG_Psi + view_offset); */
+ MAT3rotate(TMP, vec, FG_Psi - M_PI_2);
/* printf("Yaw matrix\n");
- MAT3print(tmp, stdout); */
- MAT3mult(R, R, tmp);
+ MAT3print(TMP, stdout); */
+ MAT3mult(R, R, TMP);
/* MAT3print(R, stdout); */
- /* generate the current forward and up vectors */
+ /* generate the current up, forward, and fwrd-view vectors */
+ MAT3_SET_VEC(vec, 0.0, 0.0, 1.0);
+ MAT3mult_vec(up, vec, R);
+
MAT3_SET_VEC(vec, 1.0, 0.0, 0.0);
MAT3mult_vec(forward, vec, R);
printf("Forward vector is (%.2f,%.2f,%.2f)\n", forward[0], forward[1],
forward[2]);
- MAT3_SET_VEC(vec, 0.0, 0.0, 1.0);
- MAT3mult_vec(up, vec, R);
+
+ MAT3rotate(TMP, up, view_offset);
+ MAT3mult_vec(fwrd_view, forward, TMP);
gluLookAt(pos_x, pos_y, pos_z,
- pos_x + forward[0], pos_y + forward[1], pos_z + forward[2],
+ pos_x + fwrd_view[0], pos_y + fwrd_view[1], pos_z + fwrd_view[2],
up[0], up[1], up[2]);
glLightfv( GL_LIGHT0, GL_POSITION, sun_vec );
/**************************************************************************
- * Timer management routines
+ * Update internal time dependent calculations (i.e. flight model)
**************************************************************************/
-static struct itimerval t, ot;
-
-/* This routine catches the SIGALRM */
-void fgTimerCatch() {
+void fgUpdateTimeDepCalcs(int multi_loop) {
struct flight_params *f;
- static double lastSimtime = -99.9;
- int Overrun;
-
- /* ignore any SIGALRM's until we come back from our EOM iteration */
- signal(SIGALRM, SIG_IGN);
+ int i;
f = ¤t_aircraft.flight;
- /* printf("In fgTimerCatch()\n"); */
-
- Overrun = (lastSimtime == Simtime);
-
- /* add this back in when you get simtime working */
- /* if ( Overrun ) {
- printf("OVERRUN!!!\n");
- } */
-
/* update the flight model */
- fgFlightModelUpdate(FG_LARCSIM, f, DEFAULT_MULTILOOP);
+ if ( multi_loop < 0 ) {
+ multi_loop = DEFAULT_MULTILOOP;
+ }
- lastSimtime = Simtime;
- signal(SIGALRM, fgTimerCatch);
+ /* printf("updating flight model x %d\n", multi_loop); */
+ fgFlightModelUpdate(FG_LARCSIM, f, multi_loop);
+
+ for ( i = 0; i < multi_loop; i++ ) {
+ if ( fabs(goal_view_offset - view_offset) < 0.05 ) {
+ view_offset = goal_view_offset;
+ break;
+ } else {
+ /* move view_offset towards goal_view_offset */
+ if ( goal_view_offset > view_offset ) {
+ if ( goal_view_offset - view_offset < M_PI ) {
+ view_offset += 0.01;
+ } else {
+ view_offset -= 0.01;
+ }
+ } else {
+ if ( view_offset - goal_view_offset < M_PI ) {
+ view_offset -= 0.01;
+ } else {
+ view_offset += 0.01;
+ }
+ }
+ if ( view_offset > PI2 ) {
+ view_offset -= PI2;
+ } else if ( view_offset < 0 ) {
+ view_offset += PI2;
+ }
+ }
+ }
}
-/* this routine initializes the interval timer to generate a SIGALRM after
- * the specified interval (dt) */
-void fgTimerInit(float dt) {
- int terr;
- int isec;
- float usec;
-
- isec = (int) dt;
- usec = 1000000* (dt - (float) isec);
-
- t.it_interval.tv_sec = isec;
- t.it_interval.tv_usec = usec;
- t.it_value.tv_sec = isec;
- t.it_value.tv_usec = usec;
- /* printf("fgTimerInit() called\n"); */
- fgTimerCatch(); /* set up for SIGALRM signal catch */
- terr = setitimer( ITIMER_REAL, &t, &ot );
- if (terr) perror("Error returned from setitimer");
+
+void fgInitTimeDepCalcs() {
+ /* initialize timer */
+ fgTimerInit( 1.0 / DEFAULT_TIMER_HZ, fgUpdateTimeDepCalcs );
}
static void fgSceneryInit() {
/* make terrain mesh */
- mesh = fgSceneryCompile();
+ terrain = fgSceneryCompile();
+ runway = fgRunwayHack(0.69, 53.07);
}
/* create the terrain mesh */
GLint fgSceneryCompile() {
- GLint mesh;
+ GLint terrain;
+
+ terrain = mesh2GL(mesh_ptr);
+
+ return(terrain);
+}
+
- mesh = mesh2GL(mesh_ptr);
+/* hack in a runway */
+GLint fgRunwayHack(double width, double length) {
+ static GLfloat concrete[4] = { 0.5, 0.5, 0.5, 1.0 };
+ static GLfloat line[4] = { 0.9, 0.9, 0.9, 1.0 };
+ int i;
+ int num_lines = 16;
+ float line_len, line_width_2, cur_pos;
+
+ runway = glGenLists(1);
+ glNewList(runway, GL_COMPILE);
+
+ /* draw concrete */
+ glBegin(GL_POLYGON);
+ glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, concrete );
+ glNormal3f(0.0, 0.0, 1.0);
+
+ glVertex3d( 0.0, -width/2.0, 0.0);
+ glVertex3d( 0.0, width/2.0, 0.0);
+ glVertex3d(length, width/2.0, 0.0);
+ glVertex3d(length, -width/2.0, 0.0);
+ glEnd();
+
+ /* draw center line */
+ glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, line );
+ line_len = length / ( 2 * num_lines + 1);
+ printf("line_len = %.3f\n", line_len);
+ line_width_2 = 0.02;
+ cur_pos = line_len;
+ for ( i = 0; i < num_lines; i++ ) {
+ glBegin(GL_POLYGON);
+ glVertex3d( cur_pos, -line_width_2, 0.005);
+ glVertex3d( cur_pos, line_width_2, 0.005);
+ cur_pos += line_len;
+ glVertex3d( cur_pos, line_width_2, 0.005);
+ glVertex3d( cur_pos, -line_width_2, 0.005);
+ cur_pos += line_len;
+ glEnd();
+ }
+
+ glEndList();
- return(mesh);
+ return(runway);
}
/* draw the terrain mesh */
static void fgSceneryDraw() {
- glCallList(mesh);
+ static float z = 32.35;
+
+ glPushMatrix();
+
+ glCallList(terrain);
+
+ printf("*** Drawing runway at %.2f\n", z);
+
+ glTranslatef( -398391.28, 120070.41, 32.35);
+ glRotatef(170.0, 0.0, 0.0, 1.0);
+ glCallList(runway);
+
+ glPopMatrix();
}
/* What should we do when we have nothing else to do? How about get
* ready for the next move?*/
-static void fgMainLoop( void )
-{
- fgSlewUpdate();
- aircraft_debug(1);
+static void fgMainLoop( void ) {
+ static int remainder = 0;
+ int elapsed, multi_loop;
+
+ elapsed = fgGetTimeInterval();
+ printf("Time interval is = %d, previous remainder is = %d\n", elapsed,
+ remainder);
+ printf("--> Frame rate is = %.2f\n", 1000.0 / (float)elapsed);
+ elapsed += remainder;
+
+ multi_loop = ((float)elapsed * 0.001) * DEFAULT_MODEL_HZ;
+ remainder = elapsed - ((multi_loop*1000) / DEFAULT_MODEL_HZ);
+ printf("Model iterations needed = %d, new remainder = %d\n", multi_loop,
+ remainder);
+ aircraft_debug(1);
fgUpdateVisuals();
+
+ if ( ! use_signals ) {
+ fgUpdateTimeDepCalcs(multi_loop);
+ }
}
/* Initial Orientation */
FG_Phi = -2.658474E-06;
FG_Theta = 7.401790E-03;
- FG_Psi = 102.0 * DEG_TO_RAD;
+ FG_Psi = 282.0 * DEG_TO_RAD;
/* Initial Angular B rates */
FG_P_body = 7.206685E-05;
/* fgSlewInit(-335340,162540, 15, 4.38); */
/* fgSlewInit(-398673.28,120625.64, 53, 4.38); */
- fgFlightModelInit(FG_LARCSIM, f, 1.0/(DEFAULT_MODEL_HZ*DEFAULT_MULTILOOP));
+ fgFlightModelInit( FG_LARCSIM, f, 1.0 / DEFAULT_MODEL_HZ );
+
+ if ( use_signals ) {
+ /* init timer routines, signals, etc. Arrange for an alarm
+ signal to be generated, etc. */
+ fgInitTimeDepCalcs();
+ }
/* build all objects */
fgSceneryInit();
- /* initialize timer */
- fgTimerInit( 1.0 / DEFAULT_MODEL_HZ );
-
#ifdef GLUT
/* call fgReshape() on window resizes */
glutReshapeFunc( fgReshape );
/* $Log$
-/* Revision 1.11 1997/05/31 19:16:25 curt
-/* Elevator trim added.
+/* Revision 1.20 1997/06/21 17:12:53 curt
+/* Capitalized subdirectory names.
/*
+ * Revision 1.19 1997/06/18 04:10:31 curt
+ * A couple more runway tweaks ...
+ *
+ * Revision 1.18 1997/06/18 02:21:24 curt
+ * Hacked in a runway
+ *
+ * Revision 1.17 1997/06/17 16:51:58 curt
+ * Timer interval stuff now uses gettimeofday() instead of ftime()
+ *
+ * Revision 1.16 1997/06/17 04:19:16 curt
+ * More timer related tweaks with respect to view direction changes.
+ *
+ * Revision 1.15 1997/06/17 03:41:10 curt
+ * Nonsignal based interval timing is now working.
+ * This would be a good time to look at cleaning up the code structure a bit.
+ *
+ * Revision 1.14 1997/06/16 19:32:51 curt
+ * Starting to add general timer support.
+ *
+ * Revision 1.13 1997/06/02 03:40:06 curt
+ * A tiny bit more view tweaking.
+ *
+ * Revision 1.12 1997/06/02 03:01:38 curt
+ * Working on views (side, front, back, transitions, etc.)
+ *
+ * Revision 1.11 1997/05/31 19:16:25 curt
+ * Elevator trim added.
+ *
* Revision 1.10 1997/05/31 04:13:52 curt
* WE CAN NOW FLY!!!
*
projects / flightgear.git / blobdiff