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source: code/archive/ggz2/src/orxonox/overlays/OrxonoxOverlay.cc @ 9937

Last change on this file since 9937 was 3327, checked in by rgrieder, 15 years ago

Merged all remaining revisions from core4 back to the trunk.

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1/*
2 *   ORXONOX - the hottest 3D action shooter ever to exist
3 *                    > www.orxonox.net <
4 *
5 *
6 *   License notice:
7 *
8 *   This program is free software; you can redistribute it and/or
9 *   modify it under the terms of the GNU General Public License
10 *   as published by the Free Software Foundation; either version 2
11 *   of the License, or (at your option) any later version.
12 *
13 *   This program is distributed in the hope that it will be useful,
14 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
15 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 *   GNU General Public License for more details.
17 *
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.
21 *
22 *   Author:
23 *      Reto Grieder
24 *   Co-authors:
25 *      ...
26 *
27 */
28
29/**
30@file
31@brief Definition of the OrxonoxOverlay class.
32*/
33
34#include "OrxonoxOverlay.h"
35
36#include <cmath>
37#include <OgreOverlay.h>
38#include <OgreOverlayManager.h>
39#include <OgrePanelOverlayElement.h>
40#include <OgreRenderWindow.h>
41
42#include "util/Convert.h"
43#include "util/Exception.h"
44#include "util/StringUtils.h"
45#include "core/GameMode.h"
46#include "core/CoreIncludes.h"
47#include "core/XMLPort.h"
48#include "core/ConsoleCommand.h"
49
50namespace orxonox
51{
52    unsigned int OrxonoxOverlay::hudOverlayCounter_s = 0;
53    std::map<std::string, OrxonoxOverlay*> OrxonoxOverlay::overlays_s;
54
55    SetConsoleCommand(OrxonoxOverlay, scaleOverlay, false).accessLevel(AccessLevel::User);
56    SetConsoleCommand(OrxonoxOverlay, scrollOverlay, false).accessLevel(AccessLevel::User);
57    SetConsoleCommand(OrxonoxOverlay, toggleVisibility, false).accessLevel(AccessLevel::User);
58    SetConsoleCommand(OrxonoxOverlay, rotateOverlay, false).accessLevel(AccessLevel::User);
59
60    OrxonoxOverlay::OrxonoxOverlay(BaseObject* creator)
61        : BaseObject(creator)
62    {
63        RegisterObject(OrxonoxOverlay);
64
65        this->owner_ = 0;
66        this->group_ = 0;
67
68        if (!GameMode::showsGraphics())
69            ThrowException(NoGraphics, "Can't create OrxonoxOverlay, graphics engine not initialized");
70
71        // create the Ogre::Overlay
72        overlay_ = Ogre::OverlayManager::getSingleton().create("OrxonoxOverlay_overlay_"
73            + multi_cast<std::string>(hudOverlayCounter_s++));
74
75        // create background panel (can be used to show any picture)
76        this->background_ = static_cast<Ogre::PanelOverlayElement*>(
77            Ogre::OverlayManager::getSingleton().createOverlayElement("Panel",
78            "OrxonoxOverlay_background_" + multi_cast<std::string>(hudOverlayCounter_s++)));
79        this->overlay_->add2D(this->background_);
80
81        // Get aspect ratio from the render window. Later on, we get informed automatically
82        this->windowAspectRatio_ = static_cast<float>(this->getWindowWidth()) / this->getWindowHeight();
83        this->sizeCorrectionChanged();
84
85        this->changedVisibility();
86
87        setSize(Vector2(1.0f, 1.0f));
88        setPickPoint(Vector2(0.0f, 0.0f));
89        setPosition(Vector2(0.0f, 0.0f));
90        setRotation(Degree(0.0));
91        setAspectCorrection(false);
92        setBackgroundMaterial("");
93    }
94
95    /**
96    @brief
97        Make sure everything gets removed/destroyed.
98    @remark
99        We assume that the Ogre::OverlayManager exists (there is an assert in Ogre for that!)
100    */
101    OrxonoxOverlay::~OrxonoxOverlay()
102    {
103        if (this->isInitialized())
104        {
105            // erase ourself from the map with all overlays
106            std::map<std::string, OrxonoxOverlay*>::iterator it = overlays_s.find(this->getName());
107            if (it != overlays_s.end())
108                overlays_s.erase(it);
109
110            Ogre::OverlayManager::getSingleton().destroyOverlayElement(this->background_);
111            Ogre::OverlayManager::getSingleton().destroy(this->overlay_);
112        }
113    }
114
115    /**
116    @brief
117        Loads the OrxonoxOverlay.
118
119        This has to be called before usage, otherwise strange behaviour is
120        guaranteed! (there should be no segfaults however).
121    @copydoc
122        BaseObject::XMLPort()
123    */
124    void OrxonoxOverlay::XMLPort(Element& xmlElement, XMLPort::Mode mode)
125    {
126        SUPER(OrxonoxOverlay, XMLPort, xmlElement, mode);
127
128        XMLPortParam(OrxonoxOverlay, "size",      setSize,      getSize,      xmlElement, mode);
129        XMLPortParam(OrxonoxOverlay, "pickpoint", setPickPoint, getPickPoint, xmlElement, mode);
130        XMLPortParam(OrxonoxOverlay, "position",  setPosition,  getPosition,  xmlElement, mode);
131        XMLPortParam(OrxonoxOverlay, "rotation",  setRotation,  getRotation,  xmlElement, mode);
132        XMLPortParam(OrxonoxOverlay, "correctaspect", setAspectCorrection,   getAspectCorrection,   xmlElement, mode);
133        XMLPortParam(OrxonoxOverlay, "background",    setBackgroundMaterial, getBackgroundMaterial, xmlElement, mode);
134    }
135
136    void OrxonoxOverlay::changedName()
137    {
138        SUPER(OrxonoxOverlay, changedName);
139
140        OrxonoxOverlay::overlays_s.erase(this->getOldName());
141
142        if (OrxonoxOverlay::overlays_s.find(this->getName()) != OrxonoxOverlay::overlays_s.end())
143            COUT(1) << "Overlay names should be unique or you cannnot access them via console. Name: \"" << this->getName() << "\"" << std::endl;
144
145        OrxonoxOverlay::overlays_s[this->getName()] = this;
146    }
147
148    //! Only sets the background material name if not ""
149    void OrxonoxOverlay::setBackgroundMaterial(const std::string& material)
150    {
151        if (this->background_ && material != "")
152            this->background_->setMaterialName(material);
153    }
154
155    //! Returns the the material name of the background
156    const std::string& OrxonoxOverlay::getBackgroundMaterial() const
157    {
158        if (this->background_)
159            return this->background_->getMaterialName();
160        else
161            return BLANKSTRING;
162    }
163
164    //! Called by BaseObject when visibility has changed.
165    void OrxonoxOverlay::changedVisibility()
166    {
167        if (!this->overlay_)
168            return;
169
170        if (this->isVisible())
171            this->overlay_->show();
172        else
173            this->overlay_->hide();
174    }
175
176    /**
177    @brief
178        Called by the GraphicsManager whenever the window size changes.
179        Calculates the aspect ratio only.
180    */
181    void OrxonoxOverlay::windowResized(unsigned int newWidth, unsigned int newHeight)
182    {
183        this->windowAspectRatio_ = static_cast<float>(newWidth) / newHeight;
184        this->sizeCorrectionChanged();
185    }
186
187    /**
188    @brief
189        Called whenever the rotation angle has changed.
190    */
191    void OrxonoxOverlay::angleChanged()
192    {
193        if (!this->overlay_)
194            return;
195
196        this->overlay_->setRotate(this->angle_);
197        this->sizeCorrectionChanged();
198    }
199
200    /**
201    @brief
202        Called whenever the aspect ratio or the angle has changed.
203        The method calculates a correction factor for the size to compensate
204        for aspect distortion if desired.
205    @remarks
206        This only works when the angle is about 0 or 90 degrees.
207    */
208    void OrxonoxOverlay::sizeCorrectionChanged()
209    {
210        if (this->bCorrectAspect_)
211        {
212            float angle = this->angle_.valueDegrees();
213            if (angle < 0.0)
214                angle = -angle;
215            angle -= 180.0f * static_cast<int>(angle / 180.0);
216
217            // take the reverse if angle is about 90 degrees
218            float tempAspect;
219            if (angle > 89.0f && angle < 91.0f)
220            {
221                tempAspect = 1.0 / this->windowAspectRatio_;
222                rotState_ = Vertical;
223            }
224            else if (angle > 179 || angle < 1)
225            {
226                tempAspect = this->windowAspectRatio_;
227                rotState_ = Horizontal;
228            }
229            else
230            {
231                tempAspect = 1.0f;
232                rotState_ = Inbetween;
233            }
234
235            // note: this is only an approximation that is mostly valid when the
236            // magnitude of the width is about the magnitude of the height.
237            // Correctly we would have to take the square root of width*height
238            this->sizeCorrection_.x = 2.0f / (tempAspect + 1.0f);
239            this->sizeCorrection_.y = tempAspect * this->sizeCorrection_.x;
240        }
241        else
242        {
243            this->sizeCorrection_ = Vector2::UNIT_SCALE;
244        }
245
246        this->sizeChanged();
247    }
248
249    /**
250    @brief
251        Sets the overlay size using the actual corrected size.
252    */
253    void OrxonoxOverlay::sizeChanged()
254    {
255        if (!this->overlay_)
256            return;
257
258        this->overlay_->setScale(size_.x * sizeCorrection_.x, size_.y * sizeCorrection_.y);
259        positionChanged();
260    }
261
262    /**
263    @brief
264        Determines the position of the overlay.
265        This works also well when a rotation angle is applied. The overlay always
266        gets aligned correctly as well as possible.
267    */
268    void OrxonoxOverlay::positionChanged()
269    {
270        if (!this->overlay_)
271            return;
272
273        // transform the angle to a range of 0 - pi/2 first.
274        float angle = this->angle_.valueRadians();
275        if (angle < 0.0)
276            angle = -angle;
277        angle -= Ogre::Math::PI * static_cast<int>(angle / (Ogre::Math::PI));
278        if (angle > Ogre::Math::PI * 0.5)
279            angle = Ogre::Math::PI - angle;
280
281        // do some mathematical fiddling for a bounding box
282        Vector2 actualSize = size_ * sizeCorrection_;
283        float radius = actualSize.length();
284        float phi = atan(actualSize.y / actualSize.x);
285        Vector2 boundingBox(radius * cos(angle - phi), radius * sin(angle + phi));
286
287        // calculate the scrolling offset
288        Vector2 scroll = (position_ - 0.5 - boundingBox * (pickPoint_ - 0.5)) * 2.0;
289        this->overlay_->setScroll(scroll.x, -scroll.y);
290    }
291
292
293    //########### Console commands ############
294
295    /**
296    @brief
297        Scales an overlay by its name.
298    @param name
299        The name of the overlay defined BaseObject::setName() (usually done with the "name"
300        attribute in the xml file).
301    */
302    /*static*/ void OrxonoxOverlay::scaleOverlay(const std::string& name, float scale)
303    {
304        std::map<std::string, OrxonoxOverlay*>::const_iterator it = overlays_s.find(name);
305        if (it != overlays_s.end())
306            (*it).second->scale(Vector2(scale, scale));
307    }
308
309    /**
310    @brief
311        Toggles the visibility of an Overlay by it's name.
312    @param name
313        The name of the overlay defined BaseObject::setName() (usually done with the "name"
314        attribute in the xml file).
315    */
316    /*static*/ void OrxonoxOverlay::toggleVisibility(const std::string& name)
317    {
318        std::map<std::string, OrxonoxOverlay*>::const_iterator it = overlays_s.find(name);
319        if (it != overlays_s.end())
320        {
321            OrxonoxOverlay* overlay= (*it).second;
322            if(overlay->isVisible())
323                overlay->hide();
324            else
325                overlay->show();
326        }
327    }
328
329    /**
330    @brief
331        Scrolls an overlay by its name.
332    @param name
333        The name of the overlay defined BaseObject::setName() (usually done with the "name"
334        attribute in the xml file).
335    */
336    /*static*/ void OrxonoxOverlay::scrollOverlay(const std::string& name, const Vector2& scroll)
337    {
338        std::map<std::string, OrxonoxOverlay*>::const_iterator it = overlays_s.find(name);
339        if (it != overlays_s.end())
340            (*it).second->scroll(scroll);
341    }
342
343    /**
344    @brief
345        Rotates an overlay by its name.
346    @param name
347        The name of the overlay defined BaseObject::setName() (usually done with the "name"
348        attribute in the xml file).
349    */
350    /*static*/ void OrxonoxOverlay::rotateOverlay(const std::string& name, const Degree& angle)
351    {
352        std::map<std::string, OrxonoxOverlay*>::const_iterator it = overlays_s.find(name);
353        if (it != overlays_s.end())
354            (*it).second->rotate(angle);
355    }
356}
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