/** * @file llviewercamera.cpp * @brief LLViewerCamera class implementation * * $LicenseInfo:firstyear=2002&license=viewergpl$ * * Copyright (c) 2002-2009, Linden Research, Inc. * * Second Life Viewer Source Code * 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://secondlifegrid.net/programs/open_source/licensing/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://secondlifegrid.net/programs/open_source/licensing/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. * $/LicenseInfo$ */ #include "llviewerprecompiledheaders.h" #include "llviewercamera.h" // Viewer includes #include "llagent.h" #include "llviewercontrol.h" #include "llviewerobjectlist.h" #include "llviewerregion.h" #include "llviewerwindow.h" #include "llvovolume.h" #include "llworld.h" #include "lltoolmgr.h" #include "llviewerjoystick.h" // Linden library includes #include "lldrawable.h" #include "llface.h" #include "llgl.h" #include "llglheaders.h" #include "llquaternion.h" #include "llwindow.h" // getPixelAspectRatio() // System includes #include <iomanip> // for setprecision U32 LLViewerCamera::sCurCameraID = LLViewerCamera::CAMERA_WORLD; //glu pick matrix implementation borrowed from Mesa3D glh::matrix4f gl_pick_matrix(GLfloat x, GLfloat y, GLfloat width, GLfloat height, GLint* viewport) { GLfloat m[16]; GLfloat sx, sy; GLfloat tx, ty; sx = viewport[2] / width; sy = viewport[3] / height; tx = (viewport[2] + 2.f * (viewport[0] - x)) / width; ty = (viewport[3] + 2.f * (viewport[1] - y)) / height; #define M(row,col) m[col*4+row] M(0,0) = sx; M(0,1) = 0.f; M(0,2) = 0.f; M(0,3) = tx; M(1,0) = 0.f; M(1,1) = sy; M(1,2) = 0.f; M(1,3) = ty; M(2,0) = 0.f; M(2,1) = 0.f; M(2,2) = 1.f; M(2,3) = 0.f; M(3,0) = 0.f; M(3,1) = 0.f; M(3,2) = 0.f; M(3,3) = 1.f; #undef M return glh::matrix4f(m); } glh::matrix4f gl_perspective(GLfloat fovy, GLfloat aspect, GLfloat zNear, GLfloat zFar) { GLfloat f = 1.f/tanf(DEG_TO_RAD*fovy/2.f); return glh::matrix4f(f/aspect, 0, 0, 0, 0, f, 0, 0, 0, 0, (zFar+zNear)/(zNear-zFar), (2.f*zFar*zNear)/(zNear-zFar), 0, 0, -1.f, 0); } glh::matrix4f gl_lookat(LLVector3 eye, LLVector3 center, LLVector3 up) { LLVector3 f = center-eye; f.normVec(); up.normVec(); LLVector3 s = f % up; LLVector3 u = s % f; return glh::matrix4f(s[0], s[1], s[2], 0, u[0], u[1], u[2], 0, -f[0], -f[1], -f[2], 0, 0, 0, 0, 1); } LLViewerCamera::LLViewerCamera() : LLCamera() { calcProjection(getFar()); mCameraFOVDefault = DEFAULT_FIELD_OF_VIEW; mPixelMeterRatio = 0.f; mScreenPixelArea = 0; mZoomFactor = 1.f; mZoomSubregion = 1; gSavedSettings.getControl("CameraAngle")->getCommitSignal()->connect(boost::bind(&LLViewerCamera::updateCameraAngle, this, _2)); } void LLViewerCamera::updateCameraLocation(const LLVector3 ¢er, const LLVector3 &up_direction, const LLVector3 &point_of_interest) { // do not update if avatar didn't move if (!LLViewerJoystick::getInstance()->getCameraNeedsUpdate()) { return; } LLVector3 last_position; LLVector3 last_axis; last_position = getOrigin(); last_axis = getAtAxis(); mLastPointOfInterest = point_of_interest; // constrain to max distance from avatar LLVector3 camera_offset = center - gAgent.getPositionAgent(); LLViewerRegion * regp = gAgent.getRegion(); F32 water_height = (NULL != regp) ? regp->getWaterHeight() : 0.f; LLVector3 origin = center; if (origin.mV[2] > water_height) { origin.mV[2] = llmax(origin.mV[2], water_height+0.20f); } else { origin.mV[2] = llmin(origin.mV[2], water_height-0.20f); } setOriginAndLookAt(origin, up_direction, point_of_interest); F32 dpos = (center - last_position).magVec(); LLQuaternion rotation; rotation.shortestArc(last_axis, getAtAxis()); F32 x, y, z; F32 drot; rotation.getAngleAxis(&drot, &x, &y, &z); mVelocityStat.addValue(dpos); mAngularVelocityStat.addValue(drot); // update pixel meter ratio using default fov, not modified one mPixelMeterRatio = getViewHeightInPixels()/ (2.f*tanf(mCameraFOVDefault*0.5)); // update screen pixel area mScreenPixelArea =(S32)((F32)getViewHeightInPixels() * ((F32)getViewHeightInPixels() * getAspect())); } const LLMatrix4 &LLViewerCamera::getProjection() const { calcProjection(getFar()); return mProjectionMatrix; } const LLMatrix4 &LLViewerCamera::getModelview() const { LLMatrix4 cfr(OGL_TO_CFR_ROTATION); getMatrixToLocal(mModelviewMatrix); mModelviewMatrix *= cfr; return mModelviewMatrix; } void LLViewerCamera::calcProjection(const F32 far_distance) const { F32 fov_y, z_far, z_near, aspect, f; fov_y = getView(); z_far = far_distance; z_near = getNear(); aspect = getAspect(); f = 1/tan(fov_y*0.5f); mProjectionMatrix.setZero(); mProjectionMatrix.mMatrix[0][0] = f/aspect; mProjectionMatrix.mMatrix[1][1] = f; mProjectionMatrix.mMatrix[2][2] = (z_far + z_near)/(z_near - z_far); mProjectionMatrix.mMatrix[3][2] = (2*z_far*z_near)/(z_near - z_far); mProjectionMatrix.mMatrix[2][3] = -1; } // Sets up opengl state for 3D drawing. If for selection, also // sets up a pick matrix. x and y are ignored if for_selection is false. // The picking region is centered on x,y and has the specified width and // height. //static void LLViewerCamera::updateFrustumPlanes(LLCamera& camera, BOOL ortho, BOOL zflip, BOOL no_hacks) { GLint* viewport = (GLint*) gGLViewport; GLdouble* model = gGLModelView; GLdouble* proj = gGLProjection; GLdouble objX,objY,objZ; LLVector3 frust[8]; if (no_hacks) { gluUnProject(viewport[0],viewport[1],0,model,proj,viewport,&objX,&objY,&objZ); frust[0].setVec((F32)objX,(F32)objY,(F32)objZ); gluUnProject(viewport[0]+viewport[2],viewport[1],0,model,proj,viewport,&objX,&objY,&objZ); frust[1].setVec((F32)objX,(F32)objY,(F32)objZ); gluUnProject(viewport[0]+viewport[2],viewport[1]+viewport[3],0,model,proj,viewport,&objX,&objY,&objZ); frust[2].setVec((F32)objX,(F32)objY,(F32)objZ); gluUnProject(viewport[0],viewport[1]+viewport[3],0,model,proj,viewport,&objX,&objY,&objZ); frust[3].setVec((F32)objX,(F32)objY,(F32)objZ); gluUnProject(viewport[0],viewport[1],1,model,proj,viewport,&objX,&objY,&objZ); frust[4].setVec((F32)objX,(F32)objY,(F32)objZ); gluUnProject(viewport[0]+viewport[2],viewport[1],1,model,proj,viewport,&objX,&objY,&objZ); frust[5].setVec((F32)objX,(F32)objY,(F32)objZ); gluUnProject(viewport[0]+viewport[2],viewport[1]+viewport[3],1,model,proj,viewport,&objX,&objY,&objZ); frust[6].setVec((F32)objX,(F32)objY,(F32)objZ); gluUnProject(viewport[0],viewport[1]+viewport[3],1,model,proj,viewport,&objX,&objY,&objZ); frust[7].setVec((F32)objX,(F32)objY,(F32)objZ); } else if (zflip) { gluUnProject(viewport[0],viewport[1]+viewport[3],0,model,proj,viewport,&objX,&objY,&objZ); frust[0].setVec((F32)objX,(F32)objY,(F32)objZ); gluUnProject(viewport[0]+viewport[2],viewport[1]+viewport[3],0,model,proj,viewport,&objX,&objY,&objZ); frust[1].setVec((F32)objX,(F32)objY,(F32)objZ); gluUnProject(viewport[0]+viewport[2],viewport[1],0,model,proj,viewport,&objX,&objY,&objZ); frust[2].setVec((F32)objX,(F32)objY,(F32)objZ); gluUnProject(viewport[0],viewport[1],0,model,proj,viewport,&objX,&objY,&objZ); frust[3].setVec((F32)objX,(F32)objY,(F32)objZ); gluUnProject(viewport[0],viewport[1]+viewport[3],1,model,proj,viewport,&objX,&objY,&objZ); frust[4].setVec((F32)objX,(F32)objY,(F32)objZ); gluUnProject(viewport[0]+viewport[2],viewport[1]+viewport[3],1,model,proj,viewport,&objX,&objY,&objZ); frust[5].setVec((F32)objX,(F32)objY,(F32)objZ); gluUnProject(viewport[0]+viewport[2],viewport[1],1,model,proj,viewport,&objX,&objY,&objZ); frust[6].setVec((F32)objX,(F32)objY,(F32)objZ); gluUnProject(viewport[0],viewport[1],1,model,proj,viewport,&objX,&objY,&objZ); frust[7].setVec((F32)objX,(F32)objY,(F32)objZ); for (U32 i = 0; i < 4; i++) { frust[i+4] = frust[i+4]-frust[i]; frust[i+4].normVec(); frust[i+4] = frust[i] + frust[i+4]*camera.getFar(); } } else { gluUnProject(viewport[0],viewport[1],0,model,proj,viewport,&objX,&objY,&objZ); frust[0].setVec((F32)objX,(F32)objY,(F32)objZ); gluUnProject(viewport[0]+viewport[2],viewport[1],0,model,proj,viewport,&objX,&objY,&objZ); frust[1].setVec((F32)objX,(F32)objY,(F32)objZ); gluUnProject(viewport[0]+viewport[2],viewport[1]+viewport[3],0,model,proj,viewport,&objX,&objY,&objZ); frust[2].setVec((F32)objX,(F32)objY,(F32)objZ); gluUnProject(viewport[0],viewport[1]+viewport[3],0,model,proj,viewport,&objX,&objY,&objZ); frust[3].setVec((F32)objX,(F32)objY,(F32)objZ); if (ortho) { LLVector3 far_shift = camera.getAtAxis()*camera.getFar()*2.f; for (U32 i = 0; i < 4; i++) { frust[i+4] = frust[i] + far_shift; } } else { for (U32 i = 0; i < 4; i++) { LLVector3 vec = frust[i] - camera.getOrigin(); vec.normVec(); frust[i+4] = camera.getOrigin() + vec*camera.getFar(); } } } camera.calcAgentFrustumPlanes(frust); } void LLViewerCamera::setPerspective(BOOL for_selection, S32 x, S32 y_from_bot, S32 width, S32 height, BOOL limit_select_distance, F32 z_near, F32 z_far) { F32 fov_y, aspect; fov_y = RAD_TO_DEG * getView(); BOOL z_default_near, z_default_far = FALSE; if (z_far <= 0) { z_default_far = TRUE; z_far = getFar(); } if (z_near <= 0) { z_default_near = TRUE; z_near = getNear(); } aspect = getAspect(); // Load camera view matrix glMatrixMode( GL_PROJECTION ); glLoadIdentity(); glh::matrix4f proj_mat; if (for_selection) { // make a tiny little viewport // anything drawn into this viewport will be "selected" GLint* viewport = (GLint*) gGLViewport; proj_mat = gl_pick_matrix(x+width/2.f, y_from_bot+height/2.f, (GLfloat) width, (GLfloat) height, viewport); if (limit_select_distance) { // ...select distance from control z_far = gSavedSettings.getF32("MaxSelectDistance"); } else { z_far = gAgent.mDrawDistance; } } else { // Only override the far clip if it's not passed in explicitly. if (z_default_far) { z_far = MAX_FAR_CLIP; } glViewport(x, y_from_bot, width, height); gGLViewport[0] = x; gGLViewport[1] = y_from_bot; gGLViewport[2] = width; gGLViewport[3] = height; } if (mZoomFactor > 1.f) { float offset = mZoomFactor - 1.f; int pos_y = mZoomSubregion / llceil(mZoomFactor); int pos_x = mZoomSubregion - (pos_y*llceil(mZoomFactor)); glh::matrix4f translate; translate.set_translate(glh::vec3f(offset - (F32)pos_x * 2.f, offset - (F32)pos_y * 2.f, 0.f)); glh::matrix4f scale; scale.set_scale(glh::vec3f(mZoomFactor, mZoomFactor, 1.f)); proj_mat = scale*proj_mat; proj_mat = translate*proj_mat; } calcProjection(z_far); // Update the projection matrix cache proj_mat *= gl_perspective(fov_y,aspect,z_near,z_far); glLoadMatrixf(proj_mat.m); for (U32 i = 0; i < 16; i++) { gGLProjection[i] = proj_mat.m[i]; } glMatrixMode( GL_MODELVIEW ); glh::matrix4f modelview((GLfloat*) OGL_TO_CFR_ROTATION); GLfloat ogl_matrix[16]; getOpenGLTransform(ogl_matrix); modelview *= glh::matrix4f(ogl_matrix); glLoadMatrixf(modelview.m); if (for_selection && (width > 1 || height > 1)) { calculateFrustumPlanesFromWindow((F32)(x - width / 2) / (F32)gViewerWindow->getWindowWidth() - 0.5f, (F32)(y_from_bot - height / 2) / (F32)gViewerWindow->getWindowHeight() - 0.5f, (F32)(x + width / 2) / (F32)gViewerWindow->getWindowWidth() - 0.5f, (F32)(y_from_bot + height / 2) / (F32)gViewerWindow->getWindowHeight() - 0.5f); } // if not picking and not doing a snapshot, cache various GL matrices if (!for_selection && mZoomFactor == 1.f) { // Save GL matrices for access elsewhere in code, especially project_world_to_screen //glGetDoublev(GL_MODELVIEW_MATRIX, gGLModelView); for (U32 i = 0; i < 16; i++) { gGLModelView[i] = modelview.m[i]; } } updateFrustumPlanes(*this); /*if (gSavedSettings.getBOOL("CameraOffset")) { glMatrixMode(GL_PROJECTION); glTranslatef(0,0,-50); glRotatef(20.0,1,0,0); glMatrixMode(GL_MODELVIEW); }*/ } // Uses the last GL matrices set in set_perspective to project a point from // screen coordinates to the agent's region. void LLViewerCamera::projectScreenToPosAgent(const S32 screen_x, const S32 screen_y, LLVector3* pos_agent) const { GLdouble x, y, z; gluUnProject( GLdouble(screen_x), GLdouble(screen_y), 0.0, gGLModelView, gGLProjection, (GLint*)gGLViewport, &x, &y, &z ); pos_agent->setVec( (F32)x, (F32)y, (F32)z ); } // Uses the last GL matrices set in set_perspective to project a point from // the agent's region space to screen coordinates. Returns TRUE if point in within // the current window. BOOL LLViewerCamera::projectPosAgentToScreen(const LLVector3 &pos_agent, LLCoordGL &out_point, const BOOL clamp) const { BOOL in_front = TRUE; GLdouble x, y, z; // object's window coords, GL-style LLVector3 dir_to_point = pos_agent - getOrigin(); dir_to_point /= dir_to_point.magVec(); if (dir_to_point * getAtAxis() < 0.f) { if (clamp) { return FALSE; } else { in_front = FALSE; } } LLRect world_view_rect = gViewerWindow->getWorldViewRect(); S32 viewport[4]; viewport[0] = world_view_rect.mLeft; viewport[1] = world_view_rect.mBottom; viewport[2] = world_view_rect.getWidth(); viewport[3] = world_view_rect.getHeight(); if (GL_TRUE == gluProject(pos_agent.mV[VX], pos_agent.mV[VY], pos_agent.mV[VZ], gGLModelView, gGLProjection, (GLint*)viewport, &x, &y, &z)) { // convert screen coordinates to virtual UI coordinates x /= gViewerWindow->getDisplayScale().mV[VX]; y /= gViewerWindow->getDisplayScale().mV[VY]; // should now have the x,y coords of grab_point in screen space LLRect world_view_rect = gViewerWindow->getVirtualWorldViewRect(); // convert to pixel coordinates S32 int_x = lltrunc(x); S32 int_y = lltrunc(y); BOOL valid = TRUE; if (clamp) { if (int_x < world_view_rect.mLeft) { out_point.mX = world_view_rect.mLeft; valid = FALSE; } else if (int_x > world_view_rect.mRight) { out_point.mX = world_view_rect.mRight; valid = FALSE; } else { out_point.mX = int_x; } if (int_y < world_view_rect.mBottom) { out_point.mY = world_view_rect.mBottom; valid = FALSE; } else if (int_y > world_view_rect.mTop) { out_point.mY = world_view_rect.mTop; valid = FALSE; } else { out_point.mY = int_y; } return valid; } else { out_point.mX = int_x; out_point.mY = int_y; if (int_x < world_view_rect.mLeft) { valid = FALSE; } else if (int_x > world_view_rect.mRight) { valid = FALSE; } if (int_y < world_view_rect.mBottom) { valid = FALSE; } else if (int_y > world_view_rect.mTop) { valid = FALSE; } return in_front && valid; } } else { return FALSE; } } // Uses the last GL matrices set in set_perspective to project a point from // the agent's region space to the nearest edge in screen coordinates. // Returns TRUE if projection succeeds. BOOL LLViewerCamera::projectPosAgentToScreenEdge(const LLVector3 &pos_agent, LLCoordGL &out_point) const { LLVector3 dir_to_point = pos_agent - getOrigin(); dir_to_point /= dir_to_point.magVec(); BOOL in_front = TRUE; if (dir_to_point * getAtAxis() < 0.f) { in_front = FALSE; } LLRect world_view_rect = gViewerWindow->getWorldViewRect(); S32 viewport[4]; viewport[0] = world_view_rect.mLeft; viewport[1] = world_view_rect.mBottom; viewport[2] = world_view_rect.getWidth(); viewport[3] = world_view_rect.getHeight(); GLdouble x, y, z; // object's window coords, GL-style if (GL_TRUE == gluProject(pos_agent.mV[VX], pos_agent.mV[VY], pos_agent.mV[VZ], gGLModelView, gGLProjection, (GLint*)viewport, &x, &y, &z)) { x /= gViewerWindow->getDisplayScale().mV[VX]; y /= gViewerWindow->getDisplayScale().mV[VY]; // should now have the x,y coords of grab_point in screen space const LLRect& world_rect = gViewerWindow->getVirtualWorldViewRect(); // ...sanity check S32 int_x = lltrunc(x); S32 int_y = lltrunc(y); // find the center GLdouble center_x = (GLdouble)world_rect.getCenterX(); GLdouble center_y = (GLdouble)world_rect.getCenterY(); if (x == center_x && y == center_y) { // can't project to edge from exact center return FALSE; } // find the line from center to local GLdouble line_x = x - center_x; GLdouble line_y = y - center_y; int_x = lltrunc(center_x); int_y = lltrunc(center_y); if (0.f == line_x) { // the slope of the line is undefined if (line_y > 0.f) { int_y = world_rect.mTop; } else { int_y = world_rect.mBottom; } } else if (0 == world_rect.getWidth()) { // the diagonal slope of the view is undefined if (y < world_rect.mBottom) { int_y = world_rect.mBottom; } else if ( y > world_rect.mTop) { int_y = world_rect.mTop; } } else { F32 line_slope = (F32)(line_y / line_x); F32 rect_slope = ((F32)world_rect.getHeight()) / ((F32)world_rect.getWidth()); if (fabs(line_slope) > rect_slope) { if (line_y < 0.f) { // bottom int_y = world_rect.mBottom; } else { // top int_y = world_rect.mTop; } int_x = lltrunc(((GLdouble)int_y - center_y) / line_slope + center_x); } else if (fabs(line_slope) < rect_slope) { if (line_x < 0.f) { // left int_x = world_rect.mLeft; } else { // right int_x = world_rect.mRight; } int_y = lltrunc(((GLdouble)int_x - center_x) * line_slope + center_y); } else { // exactly parallel ==> push to the corners if (line_x > 0.f) { int_x = world_rect.mRight; } else { int_x = world_rect.mLeft; } if (line_y > 0.0f) { int_y = world_rect.mTop; } else { int_y = world_rect.mBottom; } } } if (!in_front) { int_x = world_rect.mLeft + world_rect.mRight - int_x; int_y = world_rect.mBottom + world_rect.mTop - int_y; } out_point.mX = int_x + world_rect.mLeft; out_point.mY = int_y + world_rect.mBottom; return TRUE; } return FALSE; } void LLViewerCamera::getPixelVectors(const LLVector3 &pos_agent, LLVector3 &up, LLVector3 &right) { LLVector3 to_vec = pos_agent - getOrigin(); F32 at_dist = to_vec * getAtAxis(); F32 height_meters = at_dist* (F32)tan(getView()/2.f); F32 height_pixels = getViewHeightInPixels()/2.f; F32 pixel_aspect = gViewerWindow->getWindow()->getPixelAspectRatio(); F32 meters_per_pixel = height_meters / height_pixels; up = getUpAxis() * meters_per_pixel * gViewerWindow->getDisplayScale().mV[VY]; right = -1.f * pixel_aspect * meters_per_pixel * getLeftAxis() * gViewerWindow->getDisplayScale().mV[VX]; } LLVector3 LLViewerCamera::roundToPixel(const LLVector3 &pos_agent) { F32 dist = (pos_agent - getOrigin()).magVec(); // Convert to screen space and back, preserving the depth. LLCoordGL screen_point; if (!projectPosAgentToScreen(pos_agent, screen_point, FALSE)) { // Off the screen, just return the original position. return pos_agent; } LLVector3 ray_dir; projectScreenToPosAgent(screen_point.mX, screen_point.mY, &ray_dir); ray_dir -= getOrigin(); ray_dir.normVec(); LLVector3 pos_agent_rounded = getOrigin() + ray_dir*dist; /* LLVector3 pixel_x, pixel_y; getPixelVectors(pos_agent_rounded, pixel_y, pixel_x); pos_agent_rounded += 0.5f*pixel_x, 0.5f*pixel_y; */ return pos_agent_rounded; } BOOL LLViewerCamera::cameraUnderWater() const { return getOrigin().mV[VZ] < gAgent.getRegion()->getWaterHeight(); } BOOL LLViewerCamera::areVertsVisible(LLViewerObject* volumep, BOOL all_verts) { S32 i, num_faces; LLDrawable* drawablep = volumep->mDrawable; if (!drawablep) { return FALSE; } LLVolume* volume = volumep->getVolume(); if (!volume) { return FALSE; } LLVOVolume* vo_volume = (LLVOVolume*) volumep; vo_volume->updateRelativeXform(); LLMatrix4 mat = vo_volume->getRelativeXform(); LLMatrix4 render_mat(vo_volume->getRenderRotation(), LLVector4(vo_volume->getRenderPosition())); num_faces = volume->getNumVolumeFaces(); for (i = 0; i < num_faces; i++) { const LLVolumeFace& face = volume->getVolumeFace(i); for (U32 v = 0; v < face.mVertices.size(); v++) { LLVector4 vec = LLVector4(face.mVertices[v].mPosition) * mat; if (drawablep->isActive()) { vec = vec * render_mat; } BOOL in_frustum = pointInFrustum(LLVector3(vec)) > 0; if (( !in_frustum && all_verts) || (in_frustum && !all_verts)) { return !all_verts; } } } return all_verts; } // changes local camera and broadcasts change /* virtual */ void LLViewerCamera::setView(F32 vertical_fov_rads) { F32 old_fov = LLViewerCamera::getInstance()->getView(); // cap the FoV vertical_fov_rads = llclamp(vertical_fov_rads, getMinView(), getMaxView()); if (vertical_fov_rads == old_fov) return; // send the new value to the simulator LLMessageSystem* msg = gMessageSystem; msg->newMessageFast(_PREHASH_AgentFOV); msg->nextBlockFast(_PREHASH_AgentData); msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID()); msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID()); msg->addU32Fast(_PREHASH_CircuitCode, gMessageSystem->mOurCircuitCode); msg->nextBlockFast(_PREHASH_FOVBlock); msg->addU32Fast(_PREHASH_GenCounter, 0); msg->addF32Fast(_PREHASH_VerticalAngle, vertical_fov_rads); gAgent.sendReliableMessage(); // sync the camera with the new value LLCamera::setView(vertical_fov_rads); // call base implementation } void LLViewerCamera::setDefaultFOV(F32 vertical_fov_rads) { vertical_fov_rads = llclamp(vertical_fov_rads, getMinView(), getMaxView()); setView(vertical_fov_rads); mCameraFOVDefault = vertical_fov_rads; } // static void LLViewerCamera::updateCameraAngle( void* user_data, const LLSD& value) { LLViewerCamera* self=(LLViewerCamera*)user_data; self->setDefaultFOV(value.asReal()); }