Some view tweaks.
This commit is contained in:
curt
parent
0e5ecc165c
commit
b274e7ce4a
3 changed files with 111 additions and 382 deletions
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@ -551,8 +551,11 @@ void fgReInitSubsystems( void )
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cur_fdm_state.set_CG_Position( 0.0, 0.0, 0.0 );
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// Initialize view parameters
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FG_LOG( FG_GENERAL, FG_DEBUG, "Before v->init()");
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v->Init();
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// FG_LOG( FG_GENERAL, FG_DEBUG, "Before v->init()");
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// v->Init();
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v->set_view_offset( 0.0 );
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v->set_goal_view_offset( 0.0 );
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FG_LOG( FG_GENERAL, FG_DEBUG, "After v->init()");
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v->UpdateViewMath(cur_fdm_state);
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FG_LOG( FG_GENERAL, FG_DEBUG, " abs_view_pos = " << v->get_abs_view_pos());
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@ -362,7 +362,8 @@ static void fgRenderFrame( void ) {
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// xglMatrixMode( GL_PROJECTION );
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// xglLoadIdentity();
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ssgSetFOV( current_options.get_fov(), 0.0f );
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float fov = current_options.get_fov();
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ssgSetFOV(fov * current_view.get_win_ratio(), fov);
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double agl = current_aircraft.fdm_state->get_Altitude() * FEET_TO_METER
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- scenery.cur_elev;
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@ -937,6 +938,11 @@ void fgReshape( int width, int height ) {
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current_view.set_winHeight( height );
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current_view.force_update_fov_math();
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// set these fov to be the same as in fgRenderFrame()
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float x_fov = current_options.get_fov();
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float y_fov = x_fov * 1.0 / current_view.get_win_ratio();
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ssgSetFOV( x_fov, y_fov );
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glViewport ( 0, 0, width, height );
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if ( idle_state == 1000 ) {
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@ -43,25 +43,10 @@
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#include "views.hxx"
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// Define following to extract various vectors directly
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// from matrices we have allready computed
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// rather then performing 'textbook algebra' to rederive them
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// Norman Vine -- nhv@yahoo.com
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// #define FG_VIEW_INLINE_OPTIMIZATIONS
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// temporary (hopefully) hack
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static int panel_hist = 0;
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// specify code paths ... these are done as variable rather than
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// #define's because down the road we may want to choose between them
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// on the fly for different flight models ... this way magic carpet
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// and external modes wouldn't need to recreate the LaRCsim matrices
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// themselves.
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static const bool use_larcsim_local_to_body = false;
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// This is a record containing current view parameters for the current
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// aircraft position
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FGView pilot_view;
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@ -93,48 +78,30 @@ void FGView::Init( void ) {
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((GLfloat) (winHeight)*0.4232) );
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}
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// This never changes -- NHV
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sgLARC_TO_SSG[0][0] = 0.0;
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sgLARC_TO_SSG[0][1] = 1.0;
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sgLARC_TO_SSG[0][2] = -0.0;
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sgLARC_TO_SSG[0][3] = 0.0;
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sgLARC_TO_SSG[1][0] = 0.0;
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sgLARC_TO_SSG[1][1] = 0.0;
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sgLARC_TO_SSG[1][2] = 1.0;
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sgLARC_TO_SSG[1][3] = 0.0;
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sgLARC_TO_SSG[2][0] = 1.0;
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sgLARC_TO_SSG[2][1] = -0.0;
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sgLARC_TO_SSG[2][2] = 0.0;
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sgLARC_TO_SSG[2][3] = 0.0;
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sgLARC_TO_SSG[3][0] = 0.0;
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sgLARC_TO_SSG[3][1] = 0.0;
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sgLARC_TO_SSG[3][2] = 0.0;
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sgLARC_TO_SSG[3][3] = 1.0;
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force_update_fov_math();
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}
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// Update the field of view coefficients
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void FGView::UpdateFOV( const fgOPTIONS& o ) {
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ssgSetFOV( o.get_fov(), 0.0 );
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double fov, theta_x, theta_y;
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fov = o.get_fov();
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// printf("win_ratio = %.2f\n", win_ratio);
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// calculate sin() and cos() of fov / 2 in X direction;
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theta_x = (fov * win_ratio * DEG_TO_RAD) / 2.0;
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// printf("theta_x = %.2f\n", theta_x);
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sin_fov_x = sin(theta_x);
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cos_fov_x = cos(theta_x);
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slope_x = -cos_fov_x / sin_fov_x;
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// printf("slope_x = %.2f\n", slope_x);
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// fov_x_clip and fov_y_clip convoluted algebraic simplification
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// see code executed in tilemgr.cxx when USE_FAST_FOV_CLIP not
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// defined Norman Vine -- nhv@yahoo.com
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#if defined( USE_FAST_FOV_CLIP )
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fov_x_clip = slope_x*cos_fov_x - sin_fov_x;
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#endif // defined( USE_FAST_FOV_CLIP )
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// calculate sin() and cos() of fov / 2 in Y direction;
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theta_y = (fov * DEG_TO_RAD) / 2.0;
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// printf("theta_y = %.2f\n", theta_y);
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sin_fov_y = sin(theta_y);
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cos_fov_y = cos(theta_y);
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slope_y = cos_fov_y / sin_fov_y;
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// printf("slope_y = %.2f\n", slope_y);
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#if defined( USE_FAST_FOV_CLIP )
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fov_y_clip = -(slope_y*cos_fov_y + sin_fov_y);
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#endif // defined( USE_FAST_FOV_CLIP )
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}
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// Update the view volume, position, and orientation
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void FGView::UpdateViewParams( const FGInterface& f ) {
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UpdateViewMath(f);
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@ -155,120 +122,38 @@ void FGView::UpdateViewParams( const FGInterface& f ) {
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}
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void getRotMatrix(double* out, MAT3vec vec, double radians)
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{
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/* This function contributed by Erich Boleyn (erich@uruk.org) */
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/* This function used from the Mesa OpenGL code (matrix.c) */
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double s, c; // mag,
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double vx, vy, vz, xy, yz, zx, xs, ys, zs, one_c; //, xx, yy, zz
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MAT3identity(out);
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s = sin(radians);
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c = cos(radians);
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// mag = getMagnitude();
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vx = vec[0];
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vy = vec[1];
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vz = vec[2];
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#define M(row,col) out[row*4 + col]
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/*
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* Arbitrary axis rotation matrix.
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*
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* This is composed of 5 matrices, Rz, Ry, T, Ry', Rz', multiplied
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* like so: Rz * Ry * T * Ry' * Rz'. T is the final rotation
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* (which is about the X-axis), and the two composite transforms
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* Ry' * Rz' and Rz * Ry are (respectively) the rotations necessary
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* from the arbitrary axis to the X-axis then back. They are
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* all elementary rotations.
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*
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* Rz' is a rotation about the Z-axis, to bring the axis vector
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* into the x-z plane. Then Ry' is applied, rotating about the
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* Y-axis to bring the axis vector parallel with the X-axis. The
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* rotation about the X-axis is then performed. Ry and Rz are
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* simply the respective inverse transforms to bring the arbitrary
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* axis back to it's original orientation. The first transforms
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* Rz' and Ry' are considered inverses, since the data from the
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* arbitrary axis gives you info on how to get to it, not how
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* to get away from it, and an inverse must be applied.
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*
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* The basic calculation used is to recognize that the arbitrary
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* axis vector (x, y, z), since it is of unit length, actually
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* represents the sines and cosines of the angles to rotate the
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* X-axis to the same orientation, with theta being the angle about
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* Z and phi the angle about Y (in the order described above)
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* as follows:
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*
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* cos ( theta ) = x / sqrt ( 1 - z^2 )
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* sin ( theta ) = y / sqrt ( 1 - z^2 )
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*
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* cos ( phi ) = sqrt ( 1 - z^2 )
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* sin ( phi ) = z
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*
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* Note that cos ( phi ) can further be inserted to the above
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* formulas:
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*
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* cos ( theta ) = x / cos ( phi )
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* sin ( theta ) = y / cos ( phi )
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*
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* ...etc. Because of those relations and the standard trigonometric
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* relations, it is pssible to reduce the transforms down to what
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* is used below. It may be that any primary axis chosen will give the
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* same results (modulo a sign convention) using thie method.
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*
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* Particularly nice is to notice that all divisions that might
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* have caused trouble when parallel to certain planes or
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* axis go away with care paid to reducing the expressions.
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* After checking, it does perform correctly under all cases, since
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* in all the cases of division where the denominator would have
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* been zero, the numerator would have been zero as well, giving
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* the expected result.
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*/
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one_c = 1.0F - c;
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// xx = vx * vx;
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// yy = vy * vy;
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// zz = vz * vz;
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// xy = vx * vy;
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// yz = vy * vz;
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// zx = vz * vx;
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// convert sgMat4 to MAT3 and print
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static void print_sgMat4( sgMat4 &in) {
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MAT3mat print;
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int i;
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int j;
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for ( i = 0; i < 4; i++ ) {
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for ( j = 0; j < 4; j++ ) {
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print[i][j] = in[i][j];
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}
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}
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MAT3print( print, stdout);
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}
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M(0,0) = (one_c * vx * vx) + c;
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xs = vx * s;
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yz = vy * vz * one_c;
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M(1,2) = yz + xs;
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M(2,1) = yz - xs;
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M(1,1) = (one_c * vy * vy) + c;
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ys = vy * s;
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zx = vz * vx * one_c;
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M(0,2) = zx - ys;
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M(2,0) = zx + ys;
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M(2,2) = (one_c * vz *vz) + c;
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zs = vz * s;
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xy = vx * vy * one_c;
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M(0,1) = xy + zs;
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M(1,0) = xy - zs;
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// M(0,0) = (one_c * xx) + c;
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// M(1,0) = (one_c * xy) - zs;
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// M(2,0) = (one_c * zx) + ys;
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// M(0,1) = (one_c * xy) + zs;
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// M(1,1) = (one_c * yy) + c;
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// M(2,1) = (one_c * yz) - xs;
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// M(0,2) = (one_c * zx) - ys;
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// M(1,2) = (one_c * yz) + xs;
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// M(2,2) = (one_c * zz) + c;
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#undef M
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// convert convert MAT3 to sgMat4
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static void MAT3mat_To_sgMat4( MAT3mat &in, sgMat4 &out ) {
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out[0][0] = in[0][0];
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out[0][1] = in[0][1];
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out[0][2] = in[0][2];
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out[0][3] = in[0][3];
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out[1][0] = in[1][0];
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out[1][1] = in[1][1];
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out[1][2] = in[1][2];
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out[1][3] = in[1][3];
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out[2][0] = in[2][0];
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out[2][1] = in[2][1];
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out[2][2] = in[2][2];
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out[2][3] = in[2][3];
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out[3][0] = in[3][0];
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out[3][1] = in[3][1];
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out[3][2] = in[3][2];
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out[3][3] = in[3][3];
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}
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@ -280,14 +165,13 @@ void FGView::UpdateViewMath( const FGInterface& f ) {
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double ntmp;
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if ( update_fov ) {
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// printf("Updating fov\n");
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UpdateFOV( current_options );
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ssgSetFOV( current_options.get_fov(),
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current_options.get_fov() * win_ratio );
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update_fov = false;
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}
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scenery.center = scenery.next_center;
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#if !defined(FG_VIEW_INLINE_OPTIMIZATIONS)
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// printf("scenery center = %.2f %.2f %.2f\n", scenery.center.x,
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// scenery.center.y, scenery.center.z);
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@ -310,94 +194,12 @@ void FGView::UpdateViewMath( const FGInterface& f ) {
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abs_view_pos = fgPolarToCart3d(p);
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#else // FG_VIEW_INLINE_OPTIMIZATIONS
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double tmp_radius = f.get_Sea_level_radius() * FEET_TO_METER;
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double tmp = f.get_cos_lat_geocentric() * tmp_radius;
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cur_zero_elev.setx(f.get_cos_longitude()*tmp - scenery.center.x());
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cur_zero_elev.sety(f.get_sin_longitude()*tmp - scenery.center.y());
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cur_zero_elev.setz(f.get_sin_lat_geocentric()*tmp_radius - scenery.center.z());
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// calculate view position in current FG view coordinate system
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// p.lon & p.lat are already defined earlier, p.radius was set to
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// the sea level radius, so now we add in our altitude.
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if ( f.get_Altitude() * FEET_TO_METER >
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(scenery.cur_elev + 0.5 * METER_TO_FEET) ) {
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tmp_radius += f.get_Altitude() * FEET_TO_METER;
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} else {
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tmp_radius += scenery.cur_elev + 0.5 * METER_TO_FEET ;
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}
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tmp = f.get_cos_lat_geocentric() * tmp_radius;
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abs_view_pos.setx(f.get_cos_longitude()*tmp);
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abs_view_pos.sety(f.get_sin_longitude()*tmp);
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abs_view_pos.setz(f.get_sin_lat_geocentric()*tmp_radius);
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#endif // FG_VIEW_INLINE_OPTIMIZATIONS
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view_pos = abs_view_pos - scenery.center;
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FG_LOG( FG_VIEW, FG_DEBUG, "Polar view pos = " << p );
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FG_LOG( FG_VIEW, FG_DEBUG, "Absolute view pos = " << abs_view_pos );
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FG_LOG( FG_VIEW, FG_DEBUG, "Relative view pos = " << view_pos );
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// Derive the LOCAL aircraft rotation matrix (roll, pitch, yaw)
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// from FG_T_local_to_body[3][3]
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if ( use_larcsim_local_to_body ) {
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// Question: Why is the LaRCsim matrix arranged so differently
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// than the one we need???
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// Answer (I think): The LaRCsim matrix is generated in a
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// different reference frame than we've set up for our world
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LOCAL[0][0] = f.get_T_local_to_body_33();
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LOCAL[0][1] = -f.get_T_local_to_body_32();
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LOCAL[0][2] = -f.get_T_local_to_body_31();
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LOCAL[0][3] = 0.0;
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LOCAL[1][0] = -f.get_T_local_to_body_23();
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LOCAL[1][1] = f.get_T_local_to_body_22();
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LOCAL[1][2] = f.get_T_local_to_body_21();
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LOCAL[1][3] = 0.0;
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LOCAL[2][0] = -f.get_T_local_to_body_13();
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LOCAL[2][1] = f.get_T_local_to_body_12();
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LOCAL[2][2] = f.get_T_local_to_body_11();
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LOCAL[2][3] = 0.0;
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LOCAL[3][0] = LOCAL[3][1] = LOCAL[3][2] = LOCAL[3][3] = 0.0;
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LOCAL[3][3] = 1.0;
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// printf("LaRCsim LOCAL matrix\n");
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// MAT3print(LOCAL, stdout);
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} else {
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// calculate the transformation matrix to go from LaRCsim to ssg
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sgVec3 vec1;
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sgSetVec3( vec1, 0.0, 1.0, 0.0 );
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sgMat4 mat1;
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sgMakeRotMat4( mat1, 90, vec1 );
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sgVec3 vec2;
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sgSetVec3( vec2, 1.0, 0.0, 0.0 );
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sgMat4 mat2;
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sgMakeRotMat4( mat2, 90, vec2 );
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sgMultMat4( sgLARC_TO_SSG, mat1, mat2 );
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/*
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cout << "LaRCsim to SSG:" << endl;
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MAT3mat print;
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int i;
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int j;
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for ( i = 0; i < 4; i++ ) {
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for ( j = 0; j < 4; j++ ) {
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print[i][j] = sgLARC_TO_SSG[i][j];
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}
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}
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MAT3print( print, stdout);
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*/
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// code to calculate LOCAL matrix calculated from Phi, Theta, and
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// Psi (roll, pitch, yaw) in case we aren't running LaRCsim as our
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// flight model
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@ -412,7 +214,6 @@ void FGView::UpdateViewMath( const FGInterface& f ) {
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sgMat4 sgPHI; // roll
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sgMakeRotMat4( sgPHI, f.get_Phi() * RAD_TO_DEG, sgrollvec );
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MAT3_SET_VEC(vec, 0.0, 1.0, 0.0);
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MAT3rotate(TMP, vec, f.get_Theta());
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// cout << "Pitch matrix" << endl;;
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@ -430,7 +231,6 @@ void FGView::UpdateViewMath( const FGInterface& f ) {
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sgMat4 sgROT;
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sgMultMat4( sgROT, sgPHI, sgTHETA );
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MAT3_SET_VEC(vec, 1.0, 0.0, 0.0);
|
||||
MAT3rotate(TMP, vec, -f.get_Psi());
|
||||
// cout << "Yaw matrix" << endl;
|
||||
|
|
@ -445,21 +245,8 @@ void FGView::UpdateViewMath( const FGInterface& f ) {
|
|||
sgMakeRotMat4( sgPSI, -f.get_Psi() * RAD_TO_DEG, sgyawvec );
|
||||
|
||||
sgMultMat4( sgLOCAL, sgROT, sgPSI );
|
||||
|
||||
/*
|
||||
MAT3mat print;
|
||||
int i;
|
||||
int j;
|
||||
for ( i = 0; i < 4; i++ ) {
|
||||
for ( j = 0; j < 4; j++ ) {
|
||||
print[i][j] = sgLOCAL[i][j];
|
||||
}
|
||||
}
|
||||
MAT3print( print, stdout);
|
||||
*/
|
||||
} // if ( use_larcsim_local_to_body )
|
||||
|
||||
#if !defined(FG_VIEW_INLINE_OPTIMIZATIONS)
|
||||
// cout << "sgLOCAL matrix" << endl;
|
||||
// print_sgMat4( sgLOCAL );
|
||||
|
||||
// Derive the local UP transformation matrix based on *geodetic*
|
||||
// coordinates
|
||||
|
|
@ -522,19 +309,8 @@ void FGView::UpdateViewMath( const FGInterface& f ) {
|
|||
|
||||
// generate the view offset matrix
|
||||
sgMakeRotMat4( sgVIEW_OFFSET, view_offset * RAD_TO_DEG, sgview_up );
|
||||
|
||||
/*
|
||||
cout << "sg VIEW_OFFSET matrix" << endl;
|
||||
MAT3mat print;
|
||||
int i;
|
||||
int j;
|
||||
for ( i = 0; i < 4; i++ ) {
|
||||
for ( j = 0; j < 4; j++ ) {
|
||||
print[i][j] = sgVIEW_OFFSET[i][j];
|
||||
}
|
||||
}
|
||||
MAT3print( print, stdout);
|
||||
*/
|
||||
// cout << "sgVIEW_OFFSET matrix" << endl;
|
||||
// print_sgMat4( sgVIEW_OFFSET );
|
||||
|
||||
sgMultMat4( sgTMP2, sgTMP, sgVIEW_OFFSET );
|
||||
sgMultMat4( sgVIEW_ROT, sgLARC_TO_SSG, sgTMP2 );
|
||||
|
|
@ -591,62 +367,6 @@ void FGView::UpdateViewMath( const FGInterface& f ) {
|
|||
// surface_east[0], surface_east[1], surface_east[2]);
|
||||
// printf( "Should be close to zero = %.2f\n",
|
||||
// MAT3_DOT_PRODUCT(surface_south, surface_east));
|
||||
|
||||
#else // FG_VIEW_INLINE_OPTIMIZATIONS
|
||||
|
||||
// // Build spherical to cartesian transform matrix directly
|
||||
double cos_lat = f.get_cos_latitude(); // cos(-f.get_Latitude());
|
||||
double sin_lat = -f.get_sin_latitude(); // sin(-f.get_Latitude());
|
||||
double cos_lon = f.get_cos_longitude(); //cos(f.get_Longitude());
|
||||
double sin_lon = f.get_sin_longitude(); //sin(f.get_Longitude());
|
||||
|
||||
double *mat = (double *)UP;
|
||||
|
||||
mat[0] = cos_lat*cos_lon;
|
||||
mat[1] = cos_lat*sin_lon;
|
||||
mat[2] = -sin_lat;
|
||||
mat[3] = 0.0;
|
||||
mat[4] = -sin_lon;
|
||||
mat[5] = cos_lon;
|
||||
mat[6] = 0.0;
|
||||
mat[7] = 0.0;
|
||||
mat[8] = sin_lat*cos_lon;
|
||||
mat[9] = sin_lat*sin_lon;
|
||||
mat[10] = cos_lat;
|
||||
mat[11] = mat[12] = mat[13] = mat[14] = 0.0;
|
||||
mat[15] = 1.0;
|
||||
|
||||
MAT3mult(VIEW, LOCAL, UP);
|
||||
|
||||
// THESE COULD JUST BE POINTERS !!!
|
||||
MAT3_SET_VEC(local_up, mat[0], mat[1], mat[2]);
|
||||
MAT3_SET_VEC(view_up, VIEW[0][0], VIEW[0][1], VIEW[0][2]);
|
||||
MAT3_SET_VEC(forward, VIEW[2][0], VIEW[2][1], VIEW[2][2]);
|
||||
|
||||
getRotMatrix((double *)TMP, view_up, view_offset);
|
||||
MAT3mult_vec(view_forward, forward, TMP);
|
||||
|
||||
// make a vector to the current view position
|
||||
MAT3_SET_VEC(v0, view_pos.x(), view_pos.y(), view_pos.z());
|
||||
|
||||
// Given a vector pointing straight down (-Z), map into onto the
|
||||
// local plane representing "horizontal". This should give us the
|
||||
// local direction for moving "south".
|
||||
MAT3_SET_VEC(minus_z, 0.0, 0.0, -1.0);
|
||||
map_vec_onto_cur_surface_plane(local_up, v0, minus_z, surface_south);
|
||||
|
||||
MAT3_NORMALIZE_VEC(surface_south, ntmp);
|
||||
// printf( "Surface direction directly south %.6f %.6f %.6f\n",
|
||||
// surface_south[0], surface_south[1], surface_south[2]);
|
||||
|
||||
// now calculate the surface east vector
|
||||
getRotMatrix((double *)TMP, view_up, FG_PI_2);
|
||||
MAT3mult_vec(surface_east, surface_south, TMP);
|
||||
// printf( "Surface direction directly east %.6f %.6f %.6f\n",
|
||||
// surface_east[0], surface_east[1], surface_east[2]);
|
||||
// printf( "Should be close to zero = %.6f\n",
|
||||
// MAT3_DOT_PRODUCT(surface_south, surface_east));
|
||||
#endif // !defined(FG_VIEW_INLINE_OPTIMIZATIONS)
|
||||
}
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue