/indra/newview/llhudicon.cpp

  1/** 
  2 * @file llhudicon.cpp
  3 * @brief LLHUDIcon class implementation
  4 *
  5 * $LicenseInfo:firstyear=2006&license=viewerlgpl$
  6 * Second Life Viewer Source Code
  7 * Copyright (C) 2010, Linden Research, Inc.
  8 * 
  9 * This library is free software; you can redistribute it and/or
 10 * modify it under the terms of the GNU Lesser General Public
 11 * License as published by the Free Software Foundation;
 12 * version 2.1 of the License only.
 13 * 
 14 * This library is distributed in the hope that it will be useful,
 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 17 * Lesser General Public License for more details.
 18 * 
 19 * You should have received a copy of the GNU Lesser General Public
 20 * License along with this library; if not, write to the Free Software
 21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 22 * 
 23 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 24 * $/LicenseInfo$
 25 */
 26
 27#include "llviewerprecompiledheaders.h"
 28
 29#include "llhudicon.h"
 30
 31#include "llgl.h"
 32#include "llrender.h"
 33
 34#include "llviewerobject.h"
 35#include "lldrawable.h"
 36#include "llvector4a.h"
 37#include "llviewercamera.h"
 38#include "llviewertexture.h"
 39#include "llviewerwindow.h"
 40
 41//-----------------------------------------------------------------------------
 42// Local consts
 43//-----------------------------------------------------------------------------
 44const F32 ANIM_TIME = 0.4f;
 45const F32 DIST_START_FADE = 15.f;
 46const F32 DIST_END_FADE = 30.f;
 47const F32 MAX_VISIBLE_TIME = 15.f;
 48const F32 FADE_OUT_TIME = 1.f;
 49
 50//-----------------------------------------------------------------------------
 51// Utility functions
 52//-----------------------------------------------------------------------------
 53static F32 calc_bouncy_animation(F32 x)
 54{
 55	return -(cosf(x * F_PI * 2.5f - F_PI_BY_TWO))*(0.4f + x * -0.1f) + x * 1.3f;
 56}
 57
 58
 59//-----------------------------------------------------------------------------
 60// static declarations
 61//-----------------------------------------------------------------------------
 62LLHUDIcon::icon_instance_t LLHUDIcon::sIconInstances;
 63
 64LLHUDIcon::LLHUDIcon(const U8 type) :
 65			LLHUDObject(type),
 66			mImagep(NULL),
 67			mPickID(0),
 68			mScale(0.1f),
 69			mHidden(FALSE)
 70{
 71	sIconInstances.push_back(this);
 72}
 73
 74LLHUDIcon::~LLHUDIcon()
 75{
 76	mImagep = NULL;
 77}
 78
 79void LLHUDIcon::renderIcon(BOOL for_select)
 80{
 81	LLGLSUIDefault texture_state;
 82	LLGLDepthTest gls_depth(GL_TRUE);
 83	if (for_select)
 84	{
 85		gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
 86	}
 87	
 88	if (mHidden)
 89		return;
 90
 91	if (mSourceObject.isNull() || mImagep.isNull())
 92	{
 93		markDead();
 94		return;
 95	}
 96
 97	LLVector3 obj_position = mSourceObject->getRenderPosition();
 98
 99	// put icon above object, and in front
100	// RN: don't use drawable radius, it's fricking HUGE
101	LLViewerCamera* camera = LLViewerCamera::getInstance();
102	LLVector3 icon_relative_pos = (camera->getUpAxis() * ~mSourceObject->getRenderRotation());
103	icon_relative_pos.abs();
104
105	F32 distance_scale = llmin(mSourceObject->getScale().mV[VX] / icon_relative_pos.mV[VX], 
106		mSourceObject->getScale().mV[VY] / icon_relative_pos.mV[VY], 
107		mSourceObject->getScale().mV[VZ] / icon_relative_pos.mV[VZ]);
108	F32 up_distance = 0.5f * distance_scale;
109	LLVector3 icon_position = obj_position + (up_distance * camera->getUpAxis()) * 1.2f;
110
111	LLVector3 icon_to_cam = LLViewerCamera::getInstance()->getOrigin() - icon_position;
112	icon_to_cam.normVec();
113
114	icon_position += icon_to_cam * mSourceObject->mDrawable->getRadius() * 1.1f;
115
116	mDistance = dist_vec(icon_position, camera->getOrigin());
117
118	F32 alpha_factor = for_select ? 1.f : clamp_rescale(mDistance, DIST_START_FADE, DIST_END_FADE, 1.f, 0.f);
119
120	LLVector3 x_pixel_vec;
121	LLVector3 y_pixel_vec;
122	
123	camera->getPixelVectors(icon_position, y_pixel_vec, x_pixel_vec);
124
125	F32 scale_factor = 1.f;
126	if (mAnimTimer.getElapsedTimeF32() < ANIM_TIME)
127	{
128		scale_factor = llmax(0.f, calc_bouncy_animation(mAnimTimer.getElapsedTimeF32() / ANIM_TIME));
129	}
130
131	F32 time_elapsed = mLifeTimer.getElapsedTimeF32();
132	if (time_elapsed > MAX_VISIBLE_TIME)
133	{
134		markDead();
135		return;
136	}
137	
138	if (time_elapsed > MAX_VISIBLE_TIME - FADE_OUT_TIME)
139	{
140		alpha_factor *= clamp_rescale(time_elapsed, MAX_VISIBLE_TIME - FADE_OUT_TIME, MAX_VISIBLE_TIME, 1.f, 0.f);
141	}
142
143	F32 image_aspect = (F32)mImagep->getFullWidth() / (F32)mImagep->getFullHeight() ;
144	LLVector3 x_scale = image_aspect * (F32)gViewerWindow->getWindowHeightScaled() * mScale * scale_factor * x_pixel_vec;
145	LLVector3 y_scale = (F32)gViewerWindow->getWindowHeightScaled() * mScale * scale_factor * y_pixel_vec;
146
147	LLVector3 lower_left = icon_position - (x_scale * 0.5f);
148	LLVector3 lower_right = icon_position + (x_scale * 0.5f);
149	LLVector3 upper_left = icon_position - (x_scale * 0.5f) + y_scale;
150	LLVector3 upper_right = icon_position + (x_scale * 0.5f) + y_scale;
151
152	if (for_select)
153	{
154		// set color to unique color id for picking
155		LLColor4U coloru((U8)(mPickID >> 16), (U8)(mPickID >> 8), (U8)mPickID);
156		gGL.color4ubv(coloru.mV);
157	}
158	else
159	{
160		LLColor4 icon_color = LLColor4::white;
161		icon_color.mV[VALPHA] = alpha_factor;
162		gGL.color4fv(icon_color.mV);
163		gGL.getTexUnit(0)->bind(mImagep);
164	}
165
166	gGL.begin(LLRender::QUADS);
167	{
168		gGL.texCoord2f(0.f, 1.f);
169		gGL.vertex3fv(upper_left.mV);
170		gGL.texCoord2f(0.f, 0.f);
171		gGL.vertex3fv(lower_left.mV);
172		gGL.texCoord2f(1.f, 0.f);
173		gGL.vertex3fv(lower_right.mV);
174		gGL.texCoord2f(1.f, 1.f);
175		gGL.vertex3fv(upper_right.mV);
176	}
177	gGL.end();
178}
179
180void LLHUDIcon::setImage(LLViewerTexture* imagep)
181{
182	mImagep = imagep;
183	mImagep->setAddressMode(LLTexUnit::TAM_CLAMP);
184}
185
186void LLHUDIcon::setScale(F32 fraction_of_fov)
187{
188	mScale = fraction_of_fov;
189}
190
191void LLHUDIcon::markDead()
192{
193	if (mSourceObject)
194	{
195		mSourceObject->clearIcon();
196	}
197	LLHUDObject::markDead();
198}
199
200void LLHUDIcon::render()
201{
202	renderIcon(FALSE);
203}
204
205BOOL LLHUDIcon::lineSegmentIntersect(const LLVector3& start, const LLVector3& end, LLVector3* intersection)
206{
207	if (mHidden)
208		return FALSE;
209
210	if (mSourceObject.isNull() || mImagep.isNull())
211	{
212		markDead();
213		return FALSE;
214	}
215
216	LLVector3 obj_position = mSourceObject->getRenderPosition();
217
218	// put icon above object, and in front
219	// RN: don't use drawable radius, it's fricking HUGE
220	LLViewerCamera* camera = LLViewerCamera::getInstance();
221	LLVector3 icon_relative_pos = (camera->getUpAxis() * ~mSourceObject->getRenderRotation());
222	icon_relative_pos.abs();
223
224	F32 distance_scale = llmin(mSourceObject->getScale().mV[VX] / icon_relative_pos.mV[VX], 
225		mSourceObject->getScale().mV[VY] / icon_relative_pos.mV[VY], 
226		mSourceObject->getScale().mV[VZ] / icon_relative_pos.mV[VZ]);
227	F32 up_distance = 0.5f * distance_scale;
228	LLVector3 icon_position = obj_position + (up_distance * camera->getUpAxis()) * 1.2f;
229
230	LLVector3 icon_to_cam = LLViewerCamera::getInstance()->getOrigin() - icon_position;
231	icon_to_cam.normVec();
232
233	icon_position += icon_to_cam * mSourceObject->mDrawable->getRadius() * 1.1f;
234
235	mDistance = dist_vec(icon_position, camera->getOrigin());
236
237	LLVector3 x_pixel_vec;
238	LLVector3 y_pixel_vec;
239	
240	camera->getPixelVectors(icon_position, y_pixel_vec, x_pixel_vec);
241
242	F32 scale_factor = 1.f;
243	if (mAnimTimer.getElapsedTimeF32() < ANIM_TIME)
244	{
245		scale_factor = llmax(0.f, calc_bouncy_animation(mAnimTimer.getElapsedTimeF32() / ANIM_TIME));
246	}
247
248	F32 time_elapsed = mLifeTimer.getElapsedTimeF32();
249	if (time_elapsed > MAX_VISIBLE_TIME)
250	{
251		markDead();
252		return FALSE;
253	}
254	
255	F32 image_aspect = (F32)mImagep->getFullWidth() / (F32)mImagep->getFullHeight() ;
256	LLVector3 x_scale = image_aspect * (F32)gViewerWindow->getWindowHeightScaled() * mScale * scale_factor * x_pixel_vec;
257	LLVector3 y_scale = (F32)gViewerWindow->getWindowHeightScaled() * mScale * scale_factor * y_pixel_vec;
258
259	LLVector4a x_scalea;
260	LLVector4a icon_positiona;
261	LLVector4a y_scalea;
262
263	x_scalea.load3(x_scale.mV);
264	x_scalea.mul(0.5f);
265	y_scalea.load3(y_scale.mV);
266
267	icon_positiona.load3(icon_position.mV);
268
269	LLVector4a lower_left;
270	lower_left.setSub(icon_positiona, x_scalea);
271	LLVector4a lower_right;
272	lower_right.setAdd(icon_positiona, x_scalea);
273	LLVector4a upper_left;
274	upper_left.setAdd(lower_left, y_scalea);
275	LLVector4a upper_right;
276	upper_right.setAdd(lower_right, y_scalea);
277
278	LLVector4a enda;
279	enda.load3(end.mV);
280	LLVector4a starta;
281	starta.load3(start.mV);
282	LLVector4a dir;
283	dir.setSub(enda, starta);
284
285	F32 a,b,t;
286
287	if (LLTriangleRayIntersect(upper_right, upper_left, lower_right, starta, dir, a,b,t) ||
288		LLTriangleRayIntersect(upper_left, lower_left, lower_right, starta, dir, a,b,t))
289	{
290		if (intersection)
291		{
292			dir.mul(t);
293			starta.add(dir);
294			*intersection = LLVector3(starta.getF32ptr());
295		}
296		return TRUE;
297	}
298
299	return FALSE;
300}
301
302//static
303S32 LLHUDIcon::generatePickIDs(S32 start_id, S32 step_size)
304{
305	S32 cur_id = start_id;
306	icon_instance_t::iterator icon_it;
307
308	for(icon_it = sIconInstances.begin(); icon_it != sIconInstances.end(); ++icon_it)
309	{
310		(*icon_it)->mPickID = cur_id;
311		cur_id += step_size;
312	}
313
314	return cur_id;
315}
316
317//static
318LLHUDIcon* LLHUDIcon::handlePick(S32 pick_id)
319{
320	icon_instance_t::iterator icon_it;
321
322	for(icon_it = sIconInstances.begin(); icon_it != sIconInstances.end(); ++icon_it)
323	{
324		if (pick_id == (*icon_it)->mPickID)
325		{
326			return *icon_it;
327		}
328	}
329
330	return NULL;
331}
332
333//static
334LLHUDIcon* LLHUDIcon::lineSegmentIntersectAll(const LLVector3& start, const LLVector3& end, LLVector3* intersection)
335{
336	icon_instance_t::iterator icon_it;
337
338	LLVector3 local_end = end;
339	LLVector3 position;
340
341	LLHUDIcon* ret = NULL;
342	for(icon_it = sIconInstances.begin(); icon_it != sIconInstances.end(); ++icon_it)
343	{
344		LLHUDIcon* icon = *icon_it;
345		if (icon->lineSegmentIntersect(start, local_end, &position))
346		{
347			ret = icon;
348			if (intersection)
349			{
350				*intersection = position;
351			}
352			local_end = position;
353		}
354	}
355
356	return ret;
357}
358
359
360 //static
361void LLHUDIcon::updateAll()
362{
363	cleanupDeadIcons();
364}
365
366//static
367BOOL LLHUDIcon::iconsNearby()
368{
369	return !sIconInstances.empty();
370}
371
372//static
373void LLHUDIcon::cleanupDeadIcons()
374{
375	icon_instance_t::iterator icon_it;
376
377	icon_instance_t icons_to_erase;
378	for(icon_it = sIconInstances.begin(); icon_it != sIconInstances.end(); ++icon_it)
379	{
380		if ((*icon_it)->mDead)
381		{
382			icons_to_erase.push_back(*icon_it);
383		}
384	}
385
386	for(icon_it = icons_to_erase.begin(); icon_it != icons_to_erase.end(); ++icon_it)
387	{
388		icon_instance_t::iterator found_it = std::find(sIconInstances.begin(), sIconInstances.end(), *icon_it);
389		if (found_it != sIconInstances.end())
390		{
391			sIconInstances.erase(found_it);
392		}
393	}
394}
395
396//static
397S32 LLHUDIcon::getNumInstances()
398{
399	return (S32)sIconInstances.size();
400}