Second Life viewer sources 1.13.2.12

1 files changed, 1010 insertions, 0 deletions

diff --git a/linden/indra/newview/llhudtext.cpp b/linden/indra/newview/llhudtext.cpp
new file mode 100644
index 0000000..bacfaa0
--- /dev/null
+++ b/linden/indra/newview/llhudtext.cpp
@@ -0,0 +1,1010 @@
+/** 
+ * @file llhudtext.cpp
+ * @brief LLHUDText class implementation
+ *
+ * Copyright (c) 2002-2007, Linden Research, Inc.
+ * 
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlife.com/developers/opensource/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at http://secondlife.com/developers/opensource/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ */
+
+#include "llviewerprecompiledheaders.h"
+
+#include "llhudtext.h"
+
+#include "llagent.h"
+#include "llviewercontrol.h"
+#include "llchatbar.h"
+#include "llcriticaldamp.h"
+#include "lldrawable.h"
+#include "llfontgl.h"
+#include "llglheaders.h"
+#include "llhudrender.h"
+#include "llimagegl.h"
+#include "llui.h"
+#include "llviewercamera.h"
+#include "llviewerimagelist.h"
+#include "llviewerobject.h"
+#include "llvovolume.h"
+#include "llviewerwindow.h"
+#include "viewer.h"
+#include "llstatusbar.h"
+#include "llmenugl.h"
+#include "pipeline.h"
+#include <boost/tokenizer.hpp>
+
+
+const F32 SPRING_STRENGTH = 0.7f;
+const F32 RESTORATION_SPRING_TIME_CONSTANT = 0.1f;
+const F32 HORIZONTAL_PADDING = 15.f;
+const F32 VERTICAL_PADDING = 12.f;
+const F32 BUFFER_SIZE = 2.f;
+const F32 MIN_EDGE_OVERLAP = 3.f;
+F32 HUD_TEXT_MAX_WIDTH = 190.f;
+const F32 HUD_TEXT_MAX_WIDTH_NO_BUBBLE = 1000.f;
+const F32 RESIZE_TIME = 0.f;
+const S32 NUM_OVERLAP_ITERATIONS = 10;
+const F32 NEIGHBOR_FORCE_FRACTION = 1.f;
+const F32 POSITION_DAMPING_TC = 0.2f;
+const F32 MAX_STABLE_CAMERA_VELOCITY = 0.1f;
+const F32 LOD_0_SCREEN_COVERAGE = 0.15f;
+const F32 LOD_1_SCREEN_COVERAGE = 0.30f;
+const F32 LOD_2_SCREEN_COVERAGE = 0.40f;
+
+std::set<LLPointer<LLHUDText> > LLHUDText::sTextObjects;
+std::vector<LLPointer<LLHUDText> > LLHUDText::sVisibleTextObjects;
+std::vector<LLPointer<LLHUDText> > LLHUDText::sVisibleHUDTextObjects;
+
+bool lltextobject_further_away::operator()(const LLPointer<LLHUDText>& lhs, const LLPointer<LLHUDText>& rhs) const
+{
+        return (lhs->getDistance() > rhs->getDistance()) ? true : false;
+}
+
+
+LLHUDText::LLHUDText(const U8 type) :
+                        LLHUDObject(type),
+                        mUseBubble(FALSE),
+                        mUsePixelSize(TRUE),
+                        mVisibleOffScreen(FALSE),
+                        mWidth(0.f),
+                        mHeight(0.f),
+                        mFontp(LLFontGL::sSansSerifSmall),
+                        mBoldFontp(LLFontGL::sSansSerifBold),
+                        mMass(1.f),
+                        mMaxLines(10),
+                        mOffsetY(0),
+                        mTextAlignment(ALIGN_TEXT_CENTER),
+                        mVertAlignment(ALIGN_VERT_CENTER),
+                        mLOD(0)
+{
+        mColor = LLColor4(1.f, 1.f, 1.f, 1.f);
+        mDoFade = TRUE;
+        mFadeDistance = 8.f;
+        mFadeRange = 4.f;
+        mZCompare = TRUE;
+        mDropShadow = TRUE;
+        mOffscreen = FALSE;
+        mRadius = 0.1f;
+        LLPointer<LLHUDText> ptr(this);
+        sTextObjects.insert(ptr);
+        //LLDebugVarMessageBox::show("max width", &HUD_TEXT_MAX_WIDTH, 500.f, 1.f);
+}
+
+LLHUDText::~LLHUDText()
+{
+}
+
+
+void LLHUDText::render()
+{
+        if (!mOnHUDAttachment)
+        {
+                LLGLDepthTest gls_depth(GL_TRUE, GL_FALSE);
+                renderText(FALSE);
+        }
+}
+
+void LLHUDText::renderForSelect()
+{
+        if (!mOnHUDAttachment)
+        {
+                LLGLDepthTest gls_depth(GL_TRUE, GL_FALSE);
+                renderText(TRUE);
+        }
+}
+
+void LLHUDText::renderText(BOOL for_select)
+{
+        if (!mVisible)
+        {
+                return;
+        }
+
+        // don't pick text that isn't bound to a viewerobject or isn't in a bubble
+        if (for_select && 
+                (!mSourceObject || mSourceObject->mDrawable.isNull() || !mUseBubble))
+        {
+                return;
+        }
+        
+        LLGLState gls_tex(GL_TEXTURE_2D, for_select ? FALSE : TRUE);
+        LLGLState gls_blend(GL_BLEND, for_select ? FALSE : TRUE);
+        LLGLState gls_alpha(GL_ALPHA_TEST, for_select ? FALSE : TRUE);
+        
+        LLColor4 shadow_color(0.f, 0.f, 0.f, 1.f);
+        F32 alpha_factor = 1.f;
+        LLColor4 text_color = mColor;
+        if (mDoFade)
+        {
+                if (mLastDistance > mFadeDistance)
+                {
+                        alpha_factor = llmax(0.f, 1.f - (mLastDistance - mFadeDistance)/mFadeRange);
+                        text_color.mV[3] = text_color.mV[3]*alpha_factor;
+                }
+        }
+        if (text_color.mV[3] < 0.01f)
+        {
+                return;
+        }
+        shadow_color.mV[3] = text_color.mV[3];
+
+        mOffsetY = lltrunc(mHeight * ((mVertAlignment == ALIGN_VERT_CENTER) ? 0.5f : 1.f));
+
+        // *TODO: cache this image
+        LLUUID image_id;
+        image_id.set(gViewerArt.getString("rounded_square.tga"));
+        LLViewerImage* imagep = gImageList.getImage(image_id, MIPMAP_FALSE, TRUE);
+
+        // *TODO: make this a per-text setting
+        LLColor4 bg_color = gSavedSettings.getColor4("BackgroundChatColor");
+        bg_color.setAlpha(gSavedSettings.getF32("ChatBubbleOpacity") * alpha_factor);
+
+        const S32 border_height = 16;
+        const S32 border_width = 16;
+
+        // *TODO move this into helper function
+        F32 border_scale = 1.f;
+
+        if (border_height * 2 > mHeight)
+        {
+                border_scale = (F32)mHeight / ((F32)border_height * 2.f);
+        }
+        if (border_width * 2 > mWidth)
+        {
+                border_scale = llmin(border_scale, (F32)mWidth / ((F32)border_width * 2.f));
+        }
+
+        // scale screen size of borders down
+        //RN: for now, text on hud objects is never occluded
+
+        LLVector3 x_pixel_vec;
+        LLVector3 y_pixel_vec;
+        
+        if (mOnHUDAttachment)
+        {
+                x_pixel_vec = LLVector3::y_axis / (F32)gViewerWindow->getWindowWidth();
+                y_pixel_vec = LLVector3::z_axis / (F32)gViewerWindow->getWindowHeight();
+        }
+        else
+        {
+                gCamera->getPixelVectors(mPositionAgent, y_pixel_vec, x_pixel_vec);
+        }
+
+        LLVector2 border_scale_vec((F32)border_width / (F32)imagep->getWidth(), (F32)border_height / (F32)imagep->getHeight());
+        LLVector3 width_vec = mWidth * x_pixel_vec;
+        LLVector3 height_vec = mHeight * y_pixel_vec;
+        LLVector3 scaled_border_width = (F32)llfloor(border_scale * (F32)border_width) * x_pixel_vec;
+        LLVector3 scaled_border_height = (F32)llfloor(border_scale * (F32)border_height) * y_pixel_vec;
+
+        mRadius = (width_vec + height_vec).magVec() * 0.5f;
+
+        LLCoordGL screen_pos;
+        gCamera->projectPosAgentToScreen(mPositionAgent, screen_pos, FALSE);
+
+        LLVector2 screen_offset;
+        if (!mUseBubble)
+        {
+                screen_offset = mPositionOffset;
+        }
+        else
+        {
+                screen_offset = updateScreenPos(mPositionOffset);
+        }
+
+        LLVector3 render_position = mPositionAgent  
+                        + (x_pixel_vec * screen_offset.mV[VX])
+                        + (y_pixel_vec * screen_offset.mV[VY]);
+
+        //if (mOnHUD)
+        //{
+        //      render_position.mV[VY] -= fmodf(render_position.mV[VY], 1.f / (F32)gViewerWindow->getWindowWidth());
+        //      render_position.mV[VZ] -= fmodf(render_position.mV[VZ], 1.f / (F32)gViewerWindow->getWindowHeight());
+        //}
+        //else
+        //{
+        //      render_position = gCamera->roundToPixel(render_position);
+        //}
+
+        if (mUseBubble)
+        {
+                LLGLDepthTest gls_depth(GL_TRUE, GL_FALSE);
+                LLUI::pushMatrix();
+                {
+                        LLVector3 bg_pos = render_position
+                                + (F32)mOffsetY * y_pixel_vec
+                                - (width_vec / 2.f)
+                                - (height_vec);
+                        LLUI::translate(bg_pos.mV[VX], bg_pos.mV[VY], bg_pos.mV[VZ]);
+
+                        if (for_select)
+                        {
+                                LLGLSNoTexture no_texture_state;
+                                S32 name = mSourceObject->mGLName;
+                                LLColor4U coloru((U8)(name >> 16), (U8)(name >> 8), (U8)name);
+                                glColor4ubv(coloru.mV);
+                                gl_segmented_rect_3d_tex(border_scale_vec, scaled_border_width, scaled_border_height, width_vec, height_vec);
+                                LLUI::popMatrix();
+                                return;
+                        }
+                        else
+                        {
+                                LLViewerImage::bindTexture(imagep);
+                                
+                                glColor4fv(bg_color.mV);
+                                gl_segmented_rect_3d_tex(border_scale_vec, scaled_border_width, scaled_border_height, width_vec, height_vec);
+                
+                                if ( mLabelSegments.size())
+                                {
+                                        LLUI::pushMatrix();
+                                        {
+                                                glColor4f(text_color.mV[VX], text_color.mV[VY], text_color.mV[VZ], gSavedSettings.getF32("ChatBubbleOpacity") * alpha_factor);
+                                                LLVector3 label_height = (mFontp->getLineHeight() * mLabelSegments.size() + (VERTICAL_PADDING / 3.f)) * y_pixel_vec;
+                                                LLVector3 label_offset = height_vec - label_height;
+                                                LLUI::translate(label_offset.mV[VX], label_offset.mV[VY], label_offset.mV[VZ]);
+                                                gl_segmented_rect_3d_tex_top(border_scale_vec, scaled_border_width, scaled_border_height, width_vec, label_height);
+                                        }
+                                        LLUI::popMatrix();
+                                }
+                        }
+
+                        BOOL outside_width = llabs(mPositionOffset.mV[VX]) > mWidth * 0.5f;
+                        BOOL outside_height = llabs(mPositionOffset.mV[VY] + (mVertAlignment == ALIGN_VERT_TOP ? mHeight * 0.5f : 0.f)) > mHeight * (mVertAlignment == ALIGN_VERT_TOP ? mHeight * 0.75f : 0.5f);
+
+                        // draw line segments pointing to parent object
+                        if (!mOffscreen && (outside_width || outside_height))
+                        {
+                                LLUI::pushMatrix();
+                                {
+                                        glColor4fv(bg_color.mV);
+                                        LLVector3 target_pos = -1.f * (mPositionOffset.mV[VX] * x_pixel_vec + mPositionOffset.mV[VY] * y_pixel_vec);
+                                        target_pos += (width_vec / 2.f);
+                                        target_pos += mVertAlignment == ALIGN_VERT_CENTER ? (height_vec * 0.5f) : LLVector3::zero;
+                                        target_pos -= 3.f * x_pixel_vec;
+                                        target_pos -= 6.f * y_pixel_vec;
+                                        LLUI::translate(target_pos.mV[VX], target_pos.mV[VY], target_pos.mV[VZ]);
+                                        gl_segmented_rect_3d_tex(border_scale_vec, 3.f * x_pixel_vec, 3.f * y_pixel_vec, 6.f * x_pixel_vec, 6.f * y_pixel_vec); 
+                                }
+                                LLUI::popMatrix();
+
+                                
+                                LLGLDisable gls_texture_2d(GL_TEXTURE_2D);
+                                LLGLDepthTest gls_depth(mZCompare ? GL_TRUE : GL_FALSE, GL_FALSE);
+                                
+                                LLVector3 box_center_offset;
+                                box_center_offset = (width_vec * 0.5f) + (height_vec * 0.5f);
+                                LLUI::translate(box_center_offset.mV[VX], box_center_offset.mV[VY], box_center_offset.mV[VZ]);
+                                glColor4fv(bg_color.mV);
+                                LLUI::setLineWidth(2.0);
+                                glBegin(GL_LINES);
+                                {
+                                        if (outside_width)
+                                        {
+                                                LLVector3 vert;
+                                                // draw line in x then y
+                                                if (mPositionOffset.mV[VX] < 0.f)
+                                                {
+                                                        // start at right edge
+                                                        vert = width_vec * 0.5f;
+                                                        glVertex3fv(vert.mV);
+                                                }
+                                                else
+                                                {
+                                                        // start at left edge
+                                                        vert = width_vec * -0.5f;
+                                                        glVertex3fv(vert.mV);
+                                                }
+                                                vert = -mPositionOffset.mV[VX] * x_pixel_vec;
+                                                glVertex3fv(vert.mV);
+                                                glVertex3fv(vert.mV);
+                                                vert -= mPositionOffset.mV[VY] * y_pixel_vec;
+                                                vert -= ((mVertAlignment == ALIGN_VERT_TOP) ? (height_vec * 0.5f) : LLVector3::zero);
+                                                glVertex3fv(vert.mV);
+                                        }
+                                        else
+                                        {
+                                                LLVector3 vert;
+                                                // draw line in y then x
+                                                if (mPositionOffset.mV[VY] < 0.f)
+                                                {
+                                                        // start at top edge
+                                                        vert = (height_vec * 0.5f) - (mPositionOffset.mV[VX] * x_pixel_vec);
+                                                        glVertex3fv(vert.mV);
+                                                }
+                                                else
+                                                {
+                                                        // start at bottom edge
+                                                        vert = (height_vec * -0.5f)  - (mPositionOffset.mV[VX] * x_pixel_vec);
+                                                        glVertex3fv(vert.mV);
+                                                }
+                                                vert = -mPositionOffset.mV[VY] * y_pixel_vec - mPositionOffset.mV[VX] * x_pixel_vec;
+                                                vert -= ((mVertAlignment == ALIGN_VERT_TOP) ? (height_vec * 0.5f) : LLVector3::zero);
+                                                glVertex3fv(vert.mV);
+                                        }
+                                }
+                                glEnd();
+                                LLUI::setLineWidth(1.0);
+
+                        }
+                }
+                LLUI::popMatrix();
+        }
+
+        F32 y_offset = (F32)mOffsetY;
+                
+        // Render label
+        {
+                glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+
+                for(std::vector<LLHUDTextSegment>::iterator segment_iter = mLabelSegments.begin();
+                        segment_iter != mLabelSegments.end(); ++segment_iter )
+                {
+                        const LLFontGL* fontp = (segment_iter->mStyle == LLFontGL::BOLD) ? mBoldFontp : mFontp;
+                        y_offset -= fontp->getLineHeight();
+
+                        F32 x_offset;
+                        if (mTextAlignment == ALIGN_TEXT_CENTER)
+                        {
+                                x_offset = -0.5f*segment_iter->getWidth(fontp);
+                        }
+                        else // ALIGN_LEFT
+                        {
+                                x_offset = -0.5f * mWidth + (HORIZONTAL_PADDING / 2.f);
+                        }
+
+                        LLColor4 label_color(0.f, 0.f, 0.f, 1.f);
+                        label_color.mV[VALPHA] = alpha_factor;
+                        hud_render_text(segment_iter->getText(), render_position, *fontp, segment_iter->mStyle, x_offset, y_offset, label_color, mOnHUDAttachment);
+                }
+        }
+
+        // Render text
+        {
+                // -1 mMaxLines means unlimited lines.
+                S32 start_segment;
+                S32 max_lines = getMaxLines();
+
+                if (max_lines < 0) 
+                {
+                        start_segment = 0;
+                }
+                else 
+                {
+                        start_segment = llmax((S32)0, (S32)mTextSegments.size() - max_lines);
+                }
+
+                for (std::vector<LLHUDTextSegment>::iterator segment_iter = mTextSegments.begin() + start_segment;
+                         segment_iter != mTextSegments.end(); ++segment_iter )
+                {
+                        const LLFontGL* fontp = (segment_iter->mStyle == LLFontGL::BOLD) ? mBoldFontp : mFontp;
+                        y_offset -= fontp->getLineHeight();
+
+                        U8 style = segment_iter->mStyle;
+                        if (mDropShadow)
+                        {
+                                style |= LLFontGL::DROP_SHADOW;
+                        }
+        
+                        F32 x_offset;
+                        if (mTextAlignment== ALIGN_TEXT_CENTER)
+                        {
+                                x_offset = -0.5f*segment_iter->getWidth(fontp);
+                        }
+                        else // ALIGN_LEFT
+                        {
+                                x_offset = -0.5f * mWidth + (HORIZONTAL_PADDING / 2.f);
+                        }
+
+                        text_color = segment_iter->mColor;
+                        text_color.mV[VALPHA] *= alpha_factor;
+
+                        hud_render_text(segment_iter->getText(), render_position, *fontp, style, x_offset, y_offset, text_color, mOnHUDAttachment);
+                }
+        }
+}
+
+void LLHUDText::setStringUTF8(const std::string &wtext)
+{
+        setString(utf8str_to_wstring(wtext));
+}
+
+void LLHUDText::setString(const LLWString &wtext)
+{
+        mTextSegments.clear();
+        addLine(wtext, mColor);
+}
+
+void LLHUDText::clearString()
+{
+        mTextSegments.clear();
+}
+
+
+void LLHUDText::addLine(const std::string &str, const LLColor4& color, const LLFontGL::StyleFlags style)
+{
+        addLine(utf8str_to_wstring(str), color, style);
+}
+
+
+void LLHUDText::addLine(const LLWString &wstr, const LLColor4& color, const LLFontGL::StyleFlags style)
+{
+        if (gNoRender)
+        {
+                return;
+        }
+        if (!wstr.empty())
+        {
+                LLWString wline(wstr);
+                typedef boost::tokenizer<boost::char_separator<llwchar>, LLWString::const_iterator, LLWString > tokenizer;
+                LLWString seps(utf8str_to_wstring("\r\n"));
+                boost::char_separator<llwchar> sep(seps.c_str());
+
+                tokenizer tokens(wline, sep);
+                tokenizer::iterator iter = tokens.begin();
+
+                while (iter != tokens.end())
+                {
+                        U32 line_length = 0;
+                        do      
+                        {
+                                S32 segment_length = mFontp->maxDrawableChars(iter->substr(line_length).c_str(), mUseBubble ? HUD_TEXT_MAX_WIDTH : HUD_TEXT_MAX_WIDTH_NO_BUBBLE, wline.length(), TRUE);
+                                mTextSegments.push_back(LLHUDTextSegment(iter->substr(line_length, segment_length), style, color));
+                                line_length += segment_length;
+                        }
+                        while (line_length != iter->size());
+                        ++iter;
+                }
+        }
+}
+
+void LLHUDText::setLabel(const std::string &label)
+{
+        setLabel(utf8str_to_wstring(label));
+}
+
+void LLHUDText::setLabel(const LLWString &wlabel)
+{
+        mLabelSegments.clear();
+
+        if (!wlabel.empty())
+        {
+                LLWString wstr(wlabel);
+                LLWString seps(utf8str_to_wstring("\r\n"));
+                LLWString empty;
+
+                typedef boost::tokenizer<boost::char_separator<llwchar>, LLWString::const_iterator, LLWString > tokenizer;
+                boost::char_separator<llwchar> sep(seps.c_str(), empty.c_str(), boost::keep_empty_tokens);
+
+                tokenizer tokens(wstr, sep);
+                tokenizer::iterator iter = tokens.begin();
+
+                while (iter != tokens.end())
+                {
+                        U32 line_length = 0;
+                        do      
+                        {
+                                S32 segment_length = mFontp->maxDrawableChars(iter->substr(line_length).c_str(), mUseBubble ? HUD_TEXT_MAX_WIDTH : HUD_TEXT_MAX_WIDTH_NO_BUBBLE, wstr.length(), TRUE);
+                                mLabelSegments.push_back(LLHUDTextSegment(iter->substr(line_length, segment_length), LLFontGL::NORMAL, mColor));
+                                line_length += segment_length;
+                        }
+                        while (line_length != iter->size());
+                        ++iter;
+                }
+        }
+}
+
+void LLHUDText::setDropShadow(const BOOL do_shadow)
+{
+        mDropShadow = do_shadow;
+}
+
+void LLHUDText::setZCompare(const BOOL zcompare)
+{
+        mZCompare = zcompare;
+}
+
+void LLHUDText::setFont(const LLFontGL* font)
+{
+        mFontp = font;
+}
+
+
+void LLHUDText::setColor(const LLColor4 &color)
+{
+        mColor = color;
+        for (std::vector<LLHUDTextSegment>::iterator segment_iter = mTextSegments.begin();
+                 segment_iter != mTextSegments.end(); ++segment_iter )
+        {
+                segment_iter->mColor = color;
+        }
+}
+
+
+void LLHUDText::setUsePixelSize(const BOOL use_pixel_size)
+{
+        mUsePixelSize = use_pixel_size;
+}
+
+void LLHUDText::setDoFade(const BOOL do_fade)
+{
+        mDoFade = do_fade;
+}
+
+void LLHUDText::updateVisibility()
+{
+        if (mSourceObject)
+        {
+                mSourceObject->updateText();
+        }
+        
+        mPositionAgent = gAgent.getPosAgentFromGlobal(mPositionGlobal);
+
+        if (!mSourceObject)
+        {
+                //llwarns << "LLHUDText::updateScreenPos -- mSourceObject is NULL!" << llendl;
+                mVisible = TRUE;
+                if (mOnHUDAttachment)
+                {
+                        sVisibleHUDTextObjects.push_back(LLPointer<LLHUDText> (this));
+                }
+                else
+                {
+                        sVisibleTextObjects.push_back(LLPointer<LLHUDText> (this));
+                }
+                return;
+        }
+
+        // Not visible if parent object is dead
+        if (mSourceObject->isDead())
+        {
+                mVisible = FALSE;
+                return;
+        }
+
+        // for now, all text on hud objects is visible
+        if (mOnHUDAttachment)
+        {
+                mVisible = TRUE;
+                sVisibleHUDTextObjects.push_back(LLPointer<LLHUDText> (this));
+                mLastDistance = mPositionAgent.mV[VX];
+                return;
+        }
+
+        // push text towards camera by radius of object, but not past camera
+        LLVector3 vec_from_camera = mPositionAgent - gCamera->getOrigin();
+        LLVector3 dir_from_camera = vec_from_camera;
+        dir_from_camera.normVec();
+
+        if (dir_from_camera * gCamera->getAtAxis() <= 0.f)
+        {
+                mPositionAgent -= projected_vec(vec_from_camera, gCamera->getAtAxis()) * 1.f;
+                mPositionAgent += gCamera->getAtAxis() * (gCamera->getNear() + 0.1f);
+        }
+        else if (vec_from_camera * gCamera->getAtAxis() <= gCamera->getNear() + 0.1f + mSourceObject->getVObjRadius())
+        {
+                mPositionAgent = gCamera->getOrigin() + vec_from_camera * ((gCamera->getNear() + 0.1f) / (vec_from_camera * gCamera->getAtAxis()));
+        }
+        else
+        {
+                mPositionAgent -= dir_from_camera * mSourceObject->getVObjRadius();
+        }
+
+        mLastDistance = (mPositionAgent - gCamera->getOrigin()).magVec();
+
+        if (mLOD >= 3 || !mTextSegments.size() || (mDoFade && (mLastDistance > mFadeDistance + mFadeRange)))
+        {
+                mVisible = FALSE;
+                return;
+        }
+
+        LLVector3 x_pixel_vec;
+        LLVector3 y_pixel_vec;
+
+        gCamera->getPixelVectors(mPositionAgent, y_pixel_vec, x_pixel_vec);
+
+        LLVector3 render_position = mPositionAgent +                    
+                        (x_pixel_vec * mPositionOffset.mV[VX]) +
+                        (y_pixel_vec * mPositionOffset.mV[VY]);
+
+        mOffscreen = FALSE;
+        if (!gCamera->sphereInFrustum(render_position, mRadius))
+        {
+                if (!mVisibleOffScreen)
+                {
+                        mVisible = FALSE;
+                        return;
+                }
+                else
+                {
+                        mOffscreen = TRUE;
+                }
+        }
+
+        mVisible = TRUE;
+        sVisibleTextObjects.push_back(LLPointer<LLHUDText> (this));
+}
+
+LLVector2 LLHUDText::updateScreenPos(LLVector2 &offset)
+{
+        LLCoordGL screen_pos;
+        LLVector2 screen_pos_vec;
+        LLVector3 x_pixel_vec;
+        LLVector3 y_pixel_vec;
+        gCamera->getPixelVectors(mPositionAgent, y_pixel_vec, x_pixel_vec);
+        LLVector3 world_pos = mPositionAgent + (offset.mV[VX] * x_pixel_vec) + (offset.mV[VY] * y_pixel_vec);
+        if (!gCamera->projectPosAgentToScreen(world_pos, screen_pos, FALSE) && mVisibleOffScreen)
+        {
+                // bubble off-screen, so find a spot for it along screen edge
+                LLVector2 window_center(gViewerWindow->getWindowDisplayWidth() * 0.5f, gViewerWindow->getWindowDisplayHeight() * 0.5f);
+                LLVector2 delta_from_center(screen_pos.mX - window_center.mV[VX], 
+                                                                        screen_pos.mY - window_center.mV[VY]);
+                delta_from_center.normVec();
+
+                F32 camera_aspect = gCamera->getAspect();
+                F32 delta_aspect = llabs(delta_from_center.mV[VX] / delta_from_center.mV[VY]);
+                if (camera_aspect / llmax(delta_aspect, 0.001f) > 1.f)
+                {
+                        // camera has wider aspect ratio than offset vector, so clamp to height
+                        delta_from_center *= llabs(window_center.mV[VY] / delta_from_center.mV[VY]);
+                }
+                else
+                {
+                        // camera has narrower aspect ratio than offset vector, so clamp to width
+                        delta_from_center *= llabs(window_center.mV[VX] / delta_from_center.mV[VX]);
+                }
+
+                screen_pos_vec = window_center + delta_from_center;
+        }
+        else
+        {
+                screen_pos_vec.setVec((F32)screen_pos.mX, (F32)screen_pos.mY);
+        }
+        S32 bottom = STATUS_BAR_HEIGHT;
+        if (gChatBar->getVisible())
+        {
+                bottom += CHAT_BAR_HEIGHT;
+        }
+
+        LLVector2 screen_center;
+        screen_center.mV[VX] = llclamp((F32)screen_pos_vec.mV[VX], mWidth * 0.5f, (F32)gViewerWindow->getWindowDisplayWidth() - mWidth * 0.5f);
+
+        if(mVertAlignment == ALIGN_VERT_TOP)
+        {
+                screen_center.mV[VY] = llclamp((F32)screen_pos_vec.mV[VY], 
+                        (F32)bottom, 
+                        (F32)gViewerWindow->getWindowDisplayHeight() - mHeight - (F32)MENU_BAR_HEIGHT);
+                mSoftScreenRect.setLeftTopAndSize(screen_center.mV[VX] - (mWidth + BUFFER_SIZE) * 0.5f, 
+                        screen_center.mV[VY] + (mHeight + BUFFER_SIZE), mWidth + BUFFER_SIZE, mHeight + BUFFER_SIZE);
+        }
+        else
+        {
+                screen_center.mV[VY] = llclamp((F32)screen_pos_vec.mV[VY], 
+                        (F32)bottom + mHeight * 0.5f, 
+                        (F32)gViewerWindow->getWindowDisplayHeight() - mHeight * 0.5f - (F32)MENU_BAR_HEIGHT);
+                mSoftScreenRect.setCenterAndSize(screen_center.mV[VX], screen_center.mV[VY], mWidth + BUFFER_SIZE, mHeight + BUFFER_SIZE);
+        }
+
+        return offset + (screen_center - LLVector2((F32)screen_pos.mX, (F32)screen_pos.mY));
+}
+
+void LLHUDText::updateSize()
+{
+        F32 width = 0.f;
+
+        S32 max_lines = getMaxLines();
+        S32 lines = (max_lines < 0) ? (S32)mTextSegments.size() : llmin((S32)mTextSegments.size(), max_lines);
+
+        F32 height = (F32)mFontp->getLineHeight() * (lines + mLabelSegments.size());
+
+        S32 start_segment;
+        if (max_lines < 0) start_segment = 0;
+        else start_segment = llmax((S32)0, (S32)mTextSegments.size() - max_lines);
+
+        std::vector<LLHUDTextSegment>::iterator iter = mTextSegments.begin() + start_segment;
+        while (iter != mTextSegments.end())
+        {
+                width = llmax(width, llmin(iter->getWidth(mFontp), HUD_TEXT_MAX_WIDTH));
+                ++iter;
+        }
+
+        iter = mLabelSegments.begin();
+        while (iter != mLabelSegments.end())
+        {
+                width = llmax(width, llmin(iter->getWidth(mFontp), HUD_TEXT_MAX_WIDTH));
+                ++iter;
+        }
+        
+        if (width == 0.f)
+        {
+                return;
+        }
+
+        width += HORIZONTAL_PADDING;
+        height += VERTICAL_PADDING;
+
+        if (!mResizeTimer.getStarted() && (width != mWidth || height != mHeight))
+        {
+                mResizeTimer.start();
+        }
+
+        // *NOTE: removed logic which did a divide by zero.
+        F32 u = 1.f;//llclamp(mResizeTimer.getElapsedTimeF32() / RESIZE_TIME, 0.f, 1.f);
+        if (u == 1.f)
+        {
+                mResizeTimer.stop();
+        }
+
+        mWidth = llmax(width, lerp(mWidth, (F32)width, u));
+        mHeight = llmax(height, lerp(mHeight, (F32)height, u));
+}
+
+void LLHUDText::updateAll()
+{
+        // iterate over all text objects, calculate their restoration forces,
+        // and add them to the visible set if they are on screen and close enough
+        sVisibleTextObjects.clear();
+        sVisibleHUDTextObjects.clear();
+        
+        TextObjectIterator text_it;
+        for (text_it = sTextObjects.begin(); text_it != sTextObjects.end(); ++text_it)
+        {
+                LLHUDText* textp = (*text_it);
+                textp->mTargetPositionOffset.clearVec();
+                textp->updateSize();
+                textp->updateVisibility();
+        }
+        
+        // sort back to front for rendering purposes
+        std::sort(sVisibleTextObjects.begin(), sVisibleTextObjects.end(), lltextobject_further_away());
+        std::sort(sVisibleHUDTextObjects.begin(), sVisibleHUDTextObjects.end(), lltextobject_further_away());
+
+        // iterate from front to back, and set LOD based on current screen coverage
+        F32 screen_area = (F32)(gViewerWindow->getWindowWidth() * gViewerWindow->getWindowHeight());
+        F32 current_screen_area = 0.f;
+        std::vector<LLPointer<LLHUDText> >::reverse_iterator r_it;
+        for (r_it = sVisibleTextObjects.rbegin(); r_it != sVisibleTextObjects.rend(); ++r_it)
+        {
+                LLHUDText* textp = (*r_it);
+                if (textp->mUseBubble)
+                {
+                        if (current_screen_area / screen_area > LOD_2_SCREEN_COVERAGE)
+                        {
+                                textp->setLOD(3);
+                        }
+                        else if (current_screen_area / screen_area > LOD_1_SCREEN_COVERAGE)
+                        {
+                                textp->setLOD(2);
+                        }
+                        else if (current_screen_area / screen_area > LOD_0_SCREEN_COVERAGE)
+                        {
+                                textp->setLOD(1);
+                        }
+                        else
+                        {
+                                textp->setLOD(0);
+                        }
+                        textp->updateSize();
+                        // find on-screen position and initialize collision rectangle
+                        textp->mTargetPositionOffset = textp->updateScreenPos(LLVector2::zero);
+                        current_screen_area += (F32)(textp->mSoftScreenRect.getWidth() * textp->mSoftScreenRect.getHeight());
+                }
+        }
+
+        LLStat* camera_vel_stat = gCamera->getVelocityStat();
+        F32 camera_vel = camera_vel_stat->getCurrent();
+        if (camera_vel > MAX_STABLE_CAMERA_VELOCITY)
+        {
+                return;
+        }
+
+        VisibleTextObjectIterator src_it;
+
+        for (S32 i = 0; i < NUM_OVERLAP_ITERATIONS; i++)
+        {
+                for (src_it = sVisibleTextObjects.begin(); src_it != sVisibleTextObjects.end(); ++src_it)
+                {
+                        LLHUDText* src_textp = (*src_it);
+
+                        if (!src_textp->mUseBubble)
+                        {
+                                continue;
+                        }
+                        VisibleTextObjectIterator dst_it = src_it;
+                        ++dst_it;
+                        for (; dst_it != sVisibleTextObjects.end(); ++dst_it)
+                        {
+                                LLHUDText* dst_textp = (*dst_it);
+
+                                if (!dst_textp->mUseBubble)
+                                {
+                                        continue;
+                                }
+                                if (src_textp->mSoftScreenRect.rectInRect(&dst_textp->mSoftScreenRect))
+                                {
+                                        LLRectf intersect_rect = src_textp->mSoftScreenRect & dst_textp->mSoftScreenRect;
+                                        intersect_rect.stretch(-BUFFER_SIZE * 0.5f);
+                                        
+                                        F32 src_center_x = src_textp->mSoftScreenRect.getCenterX();
+                                        F32 src_center_y = src_textp->mSoftScreenRect.getCenterY();
+                                        F32 dst_center_x = dst_textp->mSoftScreenRect.getCenterX();
+                                        F32 dst_center_y = dst_textp->mSoftScreenRect.getCenterY();
+                                        F32 intersect_center_x = intersect_rect.getCenterX();
+                                        F32 intersect_center_y = intersect_rect.getCenterY();
+                                        LLVector2 force = lerp(LLVector2(dst_center_x - intersect_center_x, dst_center_y - intersect_center_y), 
+                                                                                LLVector2(intersect_center_x - src_center_x, intersect_center_y - src_center_y),
+                                                                                0.5f);
+                                        force.setVec(dst_center_x - src_center_x, dst_center_y - src_center_y);
+                                        force.normVec();
+
+                                        LLVector2 src_force = -1.f * force;
+                                        LLVector2 dst_force = force;
+
+                                        LLVector2 force_strength;
+                                        F32 src_mult = dst_textp->mMass / (dst_textp->mMass + src_textp->mMass); 
+                                        F32 dst_mult = 1.f - src_mult;
+                                        F32 src_aspect_ratio = src_textp->mSoftScreenRect.getWidth() / src_textp->mSoftScreenRect.getHeight();
+                                        F32 dst_aspect_ratio = dst_textp->mSoftScreenRect.getWidth() / dst_textp->mSoftScreenRect.getHeight();
+                                        src_force.mV[VY] *= src_aspect_ratio;
+                                        src_force.normVec();
+                                        dst_force.mV[VY] *= dst_aspect_ratio;
+                                        dst_force.normVec();
+
+                                        src_force.mV[VX] *= llmin(intersect_rect.getWidth() * src_mult, intersect_rect.getHeight() * SPRING_STRENGTH);
+                                        src_force.mV[VY] *= llmin(intersect_rect.getHeight() * src_mult, intersect_rect.getWidth() * SPRING_STRENGTH);
+                                        dst_force.mV[VX] *=  llmin(intersect_rect.getWidth() * dst_mult, intersect_rect.getHeight() * SPRING_STRENGTH);
+                                        dst_force.mV[VY] *=  llmin(intersect_rect.getHeight() * dst_mult, intersect_rect.getWidth() * SPRING_STRENGTH);
+                                        
+                                        src_textp->mTargetPositionOffset += src_force;
+                                        dst_textp->mTargetPositionOffset += dst_force;
+                                        src_textp->mTargetPositionOffset = src_textp->updateScreenPos(src_textp->mTargetPositionOffset);
+                                        dst_textp->mTargetPositionOffset = dst_textp->updateScreenPos(dst_textp->mTargetPositionOffset);
+                                }
+                        }
+                }
+        }
+
+        VisibleTextObjectIterator this_object_it;
+        for (this_object_it = sVisibleTextObjects.begin(); this_object_it != sVisibleTextObjects.end(); ++this_object_it)
+        {
+                if (!(*this_object_it)->mUseBubble)
+                {
+                        continue;
+                }
+                (*this_object_it)->mPositionOffset = lerp((*this_object_it)->mPositionOffset, (*this_object_it)->mTargetPositionOffset, LLCriticalDamp::getInterpolant(POSITION_DAMPING_TC));
+        }
+}
+
+void LLHUDText::setLOD(S32 lod)
+{
+        mLOD = lod;
+        //RN: uncomment this to visualize LOD levels
+        //char label[255];
+        //sprintf(label, "%d", lod);
+        //setLabel(label);
+}
+
+S32 LLHUDText::getMaxLines()
+{
+        switch(mLOD)
+        {
+        case 0:
+                return mMaxLines;
+        case 1:
+                return mMaxLines > 0 ? mMaxLines / 2 : 5;
+        case 2:
+                return mMaxLines > 0 ? mMaxLines / 3 : 2;
+        default:
+                // label only
+                return 0;
+        }
+}
+
+void LLHUDText::markDead()
+{
+        sTextObjects.erase(LLPointer<LLHUDText>(this));
+        LLHUDObject::markDead();
+}
+
+void LLHUDText::renderAllHUD()
+{
+        LLGLEnable color_mat(GL_COLOR_MATERIAL);
+        LLGLDepthTest depth(GL_FALSE, GL_FALSE);
+        
+        VisibleTextObjectIterator text_it;
+
+        for (text_it = sVisibleHUDTextObjects.begin(); text_it != sVisibleHUDTextObjects.end(); ++text_it)
+        {
+                (*text_it)->renderText(FALSE);
+        }
+}
+
+//static 
+void LLHUDText::addPickable(std::set<LLViewerObject*> &pick_list)
+{
+        //this might put an object on the pick list a second time, overriding it's mGLName, which is ok
+        // *FIX: we should probably cull against pick frustum
+        VisibleTextObjectIterator text_it;
+        for (text_it = sVisibleTextObjects.begin(); text_it != sVisibleTextObjects.end(); ++text_it)
+        {
+                if (!(*text_it)->mUseBubble)
+                {
+                        continue;
+                }
+                pick_list.insert((*text_it)->mSourceObject);
+        }
+}
+
+//static
+// called when UI scale changes, to flush font width caches
+void LLHUDText::reshape()
+{
+        TextObjectIterator text_it;
+        for (text_it = sTextObjects.begin(); text_it != sTextObjects.end(); ++text_it)
+        {
+                LLHUDText* textp = (*text_it);
+                std::vector<LLHUDTextSegment>::iterator segment_iter; 
+                for (segment_iter = textp->mTextSegments.begin();
+                         segment_iter != textp->mTextSegments.end(); ++segment_iter )
+                {
+                        segment_iter->clearFontWidthMap();
+                }
+                for(segment_iter = textp->mLabelSegments.begin();
+                        segment_iter != textp->mLabelSegments.end(); ++segment_iter )
+                {
+                        segment_iter->clearFontWidthMap();
+                }               
+        }
+}
+
+//============================================================================
+
+F32 LLHUDText::LLHUDTextSegment::getWidth(const LLFontGL* font)
+{
+        std::map<const LLFontGL*, F32>::iterator iter = mFontWidthMap.find(font);
+        if (iter != mFontWidthMap.end())
+        {
+                return iter->second;
+        }
+        else
+        {
+                F32 width = font->getWidthF32(mText.c_str());
+                mFontWidthMap[font] = width;
+                return width;
+        }
+}