1 // HUD.hxx -- Head Up Display
3 // Written by Michele America, started September 1997.
5 // Copyright (C) 1997 Michele F. America [micheleamerica#geocities:com]
6 // Copyright (C) 2006 Melchior FRANZ [mfranz#aon:at]
8 // This program is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU General Public License as
10 // published by the Free Software Foundation; either version 2 of the
11 // License, or (at your option) any later version.
13 // This program is distributed in the hope that it will be useful, but
14 // WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
25 #include <simgear/compiler.h>
37 SG_USING_NAMESPACE(std);
41 #include <simgear/math/SGLimits.hxx>
42 #include <simgear/constants.h>
43 #include <simgear/structure/subsystem_mgr.hxx>
45 #include <Airports/runways.hxx> // FGRunway
46 #include <GUI/gui.h> // fntRenderer ? guiErrorMessage()
47 #include <GUI/new_gui.hxx> // FGFontCache, FGColor
48 #include <Include/fg_typedefs.h>
49 #include <Main/fg_props.hxx>
59 LineSegment(GLfloat x0, GLfloat y0, GLfloat x1, GLfloat y1)
60 : _x0(x0), _y0(y0), _x1(x1), _y1(y1) {}
68 GLfloat _x0, _y0, _x1, _y1;
75 void add(const LineSegment& seg) { _list.push_back(seg); }
76 void erase() { _list.erase(_list.begin(), _list.end()); }
77 inline unsigned int size() const { return _list.size(); }
80 vector<LineSegment>::const_iterator it, end = _list.end();
81 for (it = _list.begin(); it != end; ++it)
87 vector<LineSegment> _list;
94 HUDText(float x, float y, char *s, int d = 0) : _x(x), _y(y), _digits(d) {
95 strncpy(_msg, s, BUFSIZE);
98 // this code is changed to display Numbers with big/small digits
99 // according to MIL Standards for example Altitude above 10000 ft
100 // is shown as 10ooo.
102 void draw(fntRenderer *fnt) {
103 float orig_size = fnt->getPointSize();
104 if (!_digits) { // show all digits in same size
105 fnt->setPointSize(orig_size * 0.8);
106 fnt->start2f(_x, _y);
109 fnt->setPointSize(orig_size);
118 //if negative value then increase the c and p values
120 c++; // was moved to the comment. Unintentionally? TODO
124 while (tmp[i] != '\0') {
125 if ((tmp[i] >= '0') && (tmp[i] <= '9'))
130 fnt->setPointSize(orig_size * 0.8);
132 char *tmp1 = _msg + p1;
135 fnt->start2f(_x + p2, _y);
138 fnt->setPointSize(orig_size * 1.2);
140 strncpy(tmp2, _msg, p1);
143 fnt->start2f(_x, _y);
146 fnt->setPointSize(orig_size * 1.2);
147 fnt->start2f(_x, _y);
150 fnt->setPointSize(orig_size);
156 static const int BUFSIZE = 64;
164 TextList() { _font = 0; }
166 void setFont(fntRenderer *Renderer) { _font = Renderer; }
167 void add(const HUDText& String) { _list.push_back(String); }
168 void erase() { _list.erase(_list.begin(), _list.end()); }
173 glPushAttrib(GL_COLOR_BUFFER_BIT);
177 vector<HUDText>::iterator it, end = _list.end();
178 for (it = _list.begin(); it != end; ++it)
182 glDisable(GL_TEXTURE_2D);
188 vector<HUDText> _list;
196 class HUD : public SGSubsystem, public SGPropertyChangeListener {
207 // called from Main/renderer.cxx to draw 2D and 3D HUD
210 // listener callback to read various HUD related properties
211 void valueChanged(SGPropertyNode *);
212 // set current glColor
213 void setColor() const;
214 inline bool isVisible() const { return _visible; }
215 inline bool isAntialiased() const { return _antialiased; }
216 inline bool isTransparent() const { return _transparent; }
217 inline bool is3D() const { return _3Denabled; }
218 inline float alphaClamp() const { return _cl; }
219 inline double timer() const { return _timer; }
221 enum Units { FEET, METER };
222 Units getUnits() const { return _units; }
247 int load(const char *, float x = 320.0f, float y = 240.0f,
248 int level = 0, const string& indent = "");
252 void draw2D(GLfloat, GLfloat, GLfloat, GLfloat);
261 class TurnBankIndicator;
266 deque<Item *> _items;
268 SGPropertyNode_ptr _current;
269 SGPropertyNode_ptr _visibility;
270 SGPropertyNode_ptr _3DenabledN;
271 SGPropertyNode_ptr _antialiasing;
272 SGPropertyNode_ptr _transparency;
273 SGPropertyNode_ptr _red, _green, _blue, _alpha;
274 SGPropertyNode_ptr _alpha_clamp;
275 SGPropertyNode_ptr _brightness;
280 float _r, _g, _b, _a, _cl;
282 SGPropertyNode_ptr _scr_widthN, _scr_heightN;
283 int _scr_width, _scr_height;
284 SGPropertyNode_ptr _unitsN;
288 fntRenderer *_font_renderer;
289 FGFontCache *_font_cache;
296 LineList _stipple_line_list;
303 Input(const SGPropertyNode *n, float factor = 1.0, float offset = 0.0,
304 float min = -SGLimitsf::max(), float max = SGLimitsf::max()) :
307 _damped(SGLimitsf::max())
311 _factor = n->getFloatValue("factor", factor);
312 _offset = n->getFloatValue("offset", offset);
313 _min = n->getFloatValue("min", min);
314 _max = n->getFloatValue("max", max);
315 _coeff = 1.0 - 1.0 / powf(10, fabsf(n->getFloatValue("damp", 0.0)));
316 SGPropertyNode *p = ((SGPropertyNode *)n)->getNode("property", false);
318 const char *path = p->getStringValue();
319 if (path && path[0]) {
320 _property = fgGetNode(path, true);
326 bool getBoolValue() const {
328 return _property->getBoolValue();
331 const char *getStringValue() const {
333 return _property->getStringValue();
336 float getFloatValue() {
338 float f = _property->getFloatValue() * _factor + _offset;
339 if (_damped == SGLimitsf::max())
342 f = _damped = f * (1.0f - _coeff) + _damped * _coeff;
346 inline float isValid() const { return _valid; }
347 inline float min() const { return _min; }
348 inline float max() const { return _max; }
349 inline float factor() const { return _factor; }
350 float clamp(float v) const { return v < _min ? _min : v > _max ? _max : v; }
352 void set_min(float m, bool force = true) {
353 if (force || _min == -SGLimitsf::max())
356 void set_max(float m, bool force = true) {
357 if (force || _max == SGLimitsf::max())
363 SGConstPropertyNode_ptr _property;
376 Item(HUD *parent, const SGPropertyNode *, float x = 0.0f, float y = 0.0f);
378 virtual void draw() = 0;
379 virtual bool isEnabled();
382 inline float get_span() const { return _scr_span; }
383 inline Point get_centroid() const { return _mid_span; }
384 inline int get_digits() const { return _digits; }
386 inline bool option_vert() const { return (_options & VERT) == VERT; }
387 inline bool option_left() const { return (_options & LEFT) == LEFT; }
388 inline bool option_right() const { return (_options & RIGHT) == RIGHT; }
389 inline bool option_both() const { return (_options & BOTH) == BOTH; }
390 inline bool option_noticks() const { return (_options & NOTICKS) == NOTICKS; }
391 inline bool option_notext() const { return (_options & NOTEXT) == NOTEXT; }
392 inline bool option_top() const { return (_options & TOP) == TOP; }
393 inline bool option_bottom() const { return (_options & BOTTOM) == BOTTOM; }
395 void draw_line( float x1, float y1, float x2, float y2);
396 void draw_stipple_line( float x1, float y1, float x2, float y2);
397 void draw_text( float x, float y, char *msg, int digit);
398 float text_width(char *str) const;
399 void draw_circle(float x1, float y1, float r) const;
400 void draw_bullet(float, float, float);
405 float _x, _y, _w, _h;
408 SGCondition *_condition;
409 float _disp_factor; // Multiply by to get numbers shown on scale.
410 float _scr_span; // Working values for draw;
417 class HUD::Label : public Item {
419 Label(HUD *parent, const SGPropertyNode *, float x, float y);
438 Format check_format(const char *) const;
449 SGCondition *_blink_condition;
450 double _blink_interval;
451 double _blink_target; // time for next blink state change
457 // abstract base class for both moving scale and moving needle (fixed scale)
460 class HUD::Scale : public Item {
462 Scale(HUD *parent, const SGPropertyNode *, float x, float y);
463 virtual void draw ( void ) {} // No-op here. Defined in derived classes.
466 inline float factor() const { return _display_factor; }
467 inline float range_to_show() const { return _range_shown; }
470 float _major_divs; // major division marker units
471 float _minor_divs; // minor division marker units
472 unsigned int _modulo; // Roll over point
475 float _range_shown; // Width Units.
476 float _display_factor; // factor => screen units/range values.
480 class HUD::Gauge : public Scale {
482 Gauge(HUD *parent, const SGPropertyNode *, float x, float y);
488 // displays the indicated quantity on a scale that moves past the
489 // pointer. It may be horizontal or vertical.
491 class HUD::Tape : public Scale {
493 Tape(HUD *parent, const SGPropertyNode *, float x, float y);
497 void fixed(float, float, float, float, float, float);
498 void zoomed_scale(int, int);
502 float _half_width_units;
503 bool _draw_tick_bottom;
505 bool _draw_tick_right;
506 bool _draw_tick_left;
507 bool _draw_cap_bottom;
509 bool _draw_cap_right;
511 float _marker_offset;
514 enum PointerType { FIXED, MOVING } _pointer_type;
515 enum TickType { LINE, CIRCLE } _tick_type;
516 enum TickLength { VARIABLE, CONSTANT } _tick_length;
521 class HUD::Dial : public Scale {
523 Dial(HUD *parent, const SGPropertyNode *, float x, float y);
533 class HUD::TurnBankIndicator : public Item {
535 TurnBankIndicator(HUD *parent, const SGPropertyNode *, float x, float y);
544 float _bank_scale_radius;
549 class HUD::Ladder : public Item {
551 Ladder(HUD *parent, const SGPropertyNode *, float x, float y);
555 void draw_zenith(float, float, float);
556 void draw_nadir(float, float, float);
558 void draw_text(float x, float y, char *s) {
559 _locTextList.add(HUDText(x, y, s));
562 void draw_line(float x1, float y1, float x2, float y2) {
563 _locLineList.add(LineSegment(x1, y1, x2, y2));
566 void draw_stipple_line(float x1, float y1, float x2, float y2) {
567 _locStippleLineList.add(LineSegment(x1, y1, x2, y2));
570 enum Type { PITCH, CLIMB_DIVE } _type;
575 unsigned int _scr_hole;
579 bool _frl; // fuselage reference line
581 bool _velocity_vector;
585 bool _climb_dive_marker;
586 bool _glide_slope_marker;
589 bool _waypoint_marker;
594 // The Ladder has its own temporary display lists
595 TextList _locTextList;
596 LineList _locLineList;
597 LineList _locStippleLineList;
602 // responsible for rendering the active runway in the hud (if visible).
604 class HUD::Runway : public Item {
606 Runway(HUD *parent, const SGPropertyNode *, float x, float y);
610 void boundPoint(const sgdVec3& v, sgdVec3& m);
611 bool boundOutsidePoints(sgdVec3& v, sgdVec3& m);
612 bool drawLine(const sgdVec3& a1, const sgdVec3& a2, const sgdVec3& p1, const sgdVec3& p2);
614 bool get_active_runway(FGRunway& rwy);
615 void get_rwy_points(sgdVec3 *points);
618 SGPropertyNode_ptr _agl;
619 sgdVec3 _points3d[6], _points2d[6];
622 double _arrow_scale; // scales of runway indication arrow
623 double _arrow_radius;
624 double _line_scale; // maximum line scale
625 double _scale_dist; // distance where to start scaling the lines
626 double _default_pitch;
627 double _default_heading;
630 FGViewer* _cockpit_view;
631 unsigned short _stipple_out; // stipple pattern of the outline of the runway
632 unsigned short _stipple_center; // stipple pattern of the center line of the runway
633 bool _draw_arrow; // draw arrow when runway is not visible in HUD
634 bool _draw_arrow_always; // always draws arrow
635 float _left, _right, _top, _bottom;
640 class HUD::AimingReticle : public Item {
642 AimingReticle(HUD *parent, const SGPropertyNode *, float x, float y);
646 SGCondition *_active_condition; // stadiametric (true) or standby (false)
647 Input _diameter; // inner/outer radius relation