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source: code/trunk/src/orxonox/overlays/OrxonoxOverlay.cc @ 2623

Last change on this file since 2623 was 2171, checked in by landauf, 16 years ago

merged revisions 2111-2170 from objecthierarchy branch back to 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 "OrxonoxStableHeaders.h"
35#include "OrxonoxOverlay.h"
36
37#include <cmath>
38#include <OgreOverlay.h>
39#include <OgreOverlayManager.h>
40#include <OgrePanelOverlayElement.h>
41#include "util/Convert.h"
42#include "util/Exception.h"
43#include "util/String.h"
44#include "core/Core.h"
45#include "core/CoreIncludes.h"
46#include "core/XMLPort.h"
47#include "core/ConsoleCommand.h"
48
49namespace orxonox
50{
51    unsigned int OrxonoxOverlay::hudOverlayCounter_s = 0;
52    std::map<std::string, OrxonoxOverlay*> OrxonoxOverlay::overlays_s;
53
54    SetConsoleCommand(OrxonoxOverlay, scaleOverlay, false).accessLevel(AccessLevel::User);
55    SetConsoleCommand(OrxonoxOverlay, scrollOverlay, false).accessLevel(AccessLevel::User);
56    SetConsoleCommand(OrxonoxOverlay, rotateOverlay, false).accessLevel(AccessLevel::User);
57
58    OrxonoxOverlay::OrxonoxOverlay(BaseObject* creator)
59        : BaseObject(creator)
60    {
61        RegisterObject(OrxonoxOverlay);
62
63        if (!Core::showsGraphics())
64            ThrowException(NoGraphics, "Can't create OrxonoxOverlay, graphics engine not initialized");
65
66        // add this overlay to the static map of OrxonoxOverlays
67        if (overlays_s.find(this->getName()) != overlays_s.end())
68        {
69            COUT(1) << "Overlay names should be unique or you cannnot access them via console. Name: \"" << this->getName() << "\"" << std::endl;
70        }
71        overlays_s[this->getName()] = this;
72
73        // create the Ogre::Overlay
74        overlay_ = Ogre::OverlayManager::getSingleton().create("OrxonoxOverlay_overlay_"
75            + convertToString(hudOverlayCounter_s++));
76
77        // create background panel (can be used to show any picture)
78        this->background_ = static_cast<Ogre::PanelOverlayElement*>(
79            Ogre::OverlayManager::getSingleton().createOverlayElement("Panel",
80            "OrxonoxOverlay_background_" + convertToString(hudOverlayCounter_s++)));
81        this->overlay_->add2D(this->background_);
82
83        // We'll have to set the aspect ratio to a default value first.
84        // GSGraphics gets informed about our construction here and can update us in the next tick.
85        this->windowAspectRatio_ = 1.0;
86        this->sizeCorrectionChanged();
87
88        this->changedVisibility();
89
90        setSize(Vector2(1.0f, 1.0f));
91        setPickPoint(Vector2(0.0f, 0.0f));
92        setPosition(Vector2(0.0f, 0.0f));
93        setRotation(Degree(0.0));
94        setAspectCorrection(true);
95        setBackgroundMaterial("");
96    }
97
98    /**
99    @brief
100        Make sure everything gets removed/destroyed.
101    @remark
102        We assume that the Ogre::OverlayManager exists (there is an assert in Ogre for that!)
103    */
104    OrxonoxOverlay::~OrxonoxOverlay()
105    {
106        if (this->isInitialized())
107        {
108            // erase ourself from the map with all overlays
109            std::map<std::string, OrxonoxOverlay*>::iterator it = overlays_s.find(this->getName());
110            if (it != overlays_s.end())
111                overlays_s.erase(it);
112
113            Ogre::OverlayManager::getSingleton().destroyOverlayElement(this->background_);
114            Ogre::OverlayManager::getSingleton().destroy(this->overlay_);
115        }
116    }
117
118    /**
119    @brief
120        Loads the OrxonoxOverlay.
121
122        This has to be called before usage, otherwise strange behaviour is
123        guaranteed! (there should be no segfaults however).
124    @copydoc
125        BaseObject::XMLPort()
126    */
127    void OrxonoxOverlay::XMLPort(Element& xmlElement, XMLPort::Mode mode)
128    {
129        SUPER(OrxonoxOverlay, XMLPort, xmlElement, mode);
130
131        XMLPortParam(OrxonoxOverlay, "size",      setSize,      getSize,      xmlElement, mode);
132        XMLPortParam(OrxonoxOverlay, "pickPoint", setPickPoint, getPickPoint, xmlElement, mode);
133        XMLPortParam(OrxonoxOverlay, "position",  setPosition,  getPosition,  xmlElement, mode);
134        XMLPortParam(OrxonoxOverlay, "rotation",  setRotation,  getRotation,  xmlElement, mode);
135        XMLPortParam(OrxonoxOverlay, "correctAspect", setAspectCorrection,   getAspectCorrection,   xmlElement, mode);
136        XMLPortParam(OrxonoxOverlay, "background",    setBackgroundMaterial, getBackgroundMaterial, xmlElement, mode);
137    }
138
139    void OrxonoxOverlay::changedName()
140    {
141        OrxonoxOverlay::overlays_s.erase(this->getOldName());
142
143        if (OrxonoxOverlay::overlays_s.find(this->getName()) != OrxonoxOverlay::overlays_s.end())
144            COUT(1) << "Overlay names should be unique or you cannnot access them via console. Name: \"" << this->getName() << "\"" << std::endl;
145
146        OrxonoxOverlay::overlays_s[this->getName()] = this;
147    }
148
149    //! Only sets the background material name if not ""
150    void OrxonoxOverlay::setBackgroundMaterial(const std::string& material)
151    {
152        if (this->background_ && material != "")
153            this->background_->setMaterialName(material);
154    }
155
156    //! Returns the the material name of the background
157    const std::string& OrxonoxOverlay::getBackgroundMaterial() const
158    {
159        if (this->background_)
160            return this->background_->getMaterialName();
161        else
162            return BLANKSTRING;
163    }
164
165    //! Called by BaseObject when visibility has changed.
166    void OrxonoxOverlay::changedVisibility()
167    {
168        if (!this->overlay_)
169            return;
170
171        if (this->isVisible())
172            this->overlay_->show();
173        else
174            this->overlay_->hide();
175    }
176
177    /**
178    @brief
179        Called by the GraphicsEngine whenever the window size changes.
180        Calculates the aspect ratio only.
181    */
182    void OrxonoxOverlay::windowResized(int newWidth, int newHeight)
183    {
184        this->windowAspectRatio_ = newWidth/(float)newHeight;
185        this->sizeCorrectionChanged();
186    }
187
188    /**
189    @brief
190        Called whenever the rotation angle has changed.
191    */
192    void OrxonoxOverlay::angleChanged()
193    {
194        if (!this->overlay_)
195            return;
196
197        this->overlay_->setRotate(this->angle_);
198        this->sizeCorrectionChanged();
199    }
200
201    /**
202    @brief
203        Called whenever the aspect ratio or the angle has changed.
204        The method calculates a correction factor for the size to compensate
205        for aspect distortion if desired.
206    @remarks
207        This only works when the angle is about 0 or 90 degrees.
208    */
209    void OrxonoxOverlay::sizeCorrectionChanged()
210    {
211        if (this->bCorrectAspect_)
212        {
213            float angle = this->angle_.valueDegrees();
214            if (angle < 0.0)
215                angle = -angle;
216            angle -= 180.0 * (int)(angle / 180.0);
217
218            // take the reverse if angle is about 90 degrees
219            float tempAspect;
220            if (angle > 89.0 && angle < 91.0)
221            {
222                tempAspect = 1.0 / this->windowAspectRatio_;
223                rotState_ = Vertical;
224            }
225            else if (angle > 179 || angle < 1)
226            {
227                tempAspect = this->windowAspectRatio_;
228                rotState_ = Horizontal;
229            }
230            else
231            {
232                tempAspect = 1.0;
233                rotState_ = Inbetween;
234            }
235
236            // note: this is only an approximation that is mostly valid when the
237            // magnitude of the width is about the magnitude of the height.
238            // Correctly we would have to take the square root of width*height
239            this->sizeCorrection_.x = 2.0 / (tempAspect + 1.0);
240            this->sizeCorrection_.y = tempAspect * this->sizeCorrection_.x;
241        }
242        else
243        {
244            this->sizeCorrection_ = Vector2::UNIT_SCALE;
245        }
246
247        this->sizeChanged();
248    }
249
250    /**
251    @brief
252        Sets the overlay size using the actual corrected size.
253    */
254    void OrxonoxOverlay::sizeChanged()
255    {
256        if (!this->overlay_)
257            return;
258
259        this->overlay_->setScale(size_.x * sizeCorrection_.x, size_.y * sizeCorrection_.y);
260        positionChanged();
261    }
262
263    /**
264    @brief
265        Determines the position of the overlay.
266        This works also well when a rotation angle is applied. The overlay always
267        gets aligned correctly as well as possible.
268    */
269    void OrxonoxOverlay::positionChanged()
270    {
271        if (!this->overlay_)
272            return;
273
274        // transform the angle to a range of 0 - pi/2 first.
275        float angle = this->angle_.valueRadians();
276        if (angle < 0.0)
277            angle = -angle;
278        angle -= Ogre::Math::PI * (int)(angle / (Ogre::Math::PI));
279        if (angle > Ogre::Math::PI * 0.5)
280            angle = Ogre::Math::PI - angle;
281
282        // do some mathematical fiddling for a bounding box
283        Vector2 actualSize = size_ * sizeCorrection_;
284        float radius = actualSize.length();
285        float phi = atan(actualSize.y / actualSize.x);
286        Vector2 boundingBox(radius * cos(angle - phi), radius * sin(angle + phi));
287
288        // calculate the scrolling offset
289        Vector2 scroll = (position_ - 0.5 - boundingBox * (pickPoint_ - 0.5)) * 2.0;
290        this->overlay_->setScroll(scroll.x, -scroll.y);
291    }
292
293
294    //########### Console commands ############
295
296    /**
297    @brief
298        Scales an overlay by its name.
299    @param name
300        The name of the overlay defined BaseObject::setName() (usually done with the "name"
301        attribute in the xml file).
302    */
303    /*static*/ void OrxonoxOverlay::scaleOverlay(const std::string& name, float scale)
304    {
305        std::map<std::string, OrxonoxOverlay*>::const_iterator it = overlays_s.find(name);
306        if (it != overlays_s.end())
307            (*it).second->scale(Vector2(scale, scale));
308    }
309
310    /**
311    @brief
312        Scrolls an overlay by its name.
313    @param name
314        The name of the overlay defined BaseObject::setName() (usually done with the "name"
315        attribute in the xml file).
316    */
317    /*static*/ void OrxonoxOverlay::scrollOverlay(const std::string& name, const Vector2& scroll)
318    {
319        std::map<std::string, OrxonoxOverlay*>::const_iterator it = overlays_s.find(name);
320        if (it != overlays_s.end())
321            (*it).second->scroll(scroll);
322    }
323
324    /**
325    @brief
326        Rotates an overlay by its name.
327    @param name
328        The name of the overlay defined BaseObject::setName() (usually done with the "name"
329        attribute in the xml file).
330    */
331    /*static*/ void OrxonoxOverlay::rotateOverlay(const std::string& name, const Degree& angle)
332    {
333        std::map<std::string, OrxonoxOverlay*>::const_iterator it = overlays_s.find(name);
334        if (it != overlays_s.end())
335            (*it).second->rotate(angle);
336    }
337}
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