llviewercamera.cpp
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- /**
- * @file llviewercamera.cpp
- * @brief LLViewerCamera class implementation
- *
- * $LicenseInfo:firstyear=2002&license=viewergpl$
- *
- * Copyright (c) 2002-2010, 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"
- #define LLVIEWERCAMERA_CPP
- #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);
-
- }
- // Build time optimization, generate this once in .cpp file
- template class LLViewerCamera* LLSingleton<class LLViewerCamera>::getInstance();
- LLViewerCamera::LLViewerCamera() : LLCamera()
- {
- calcProjection(getFar());
- mCameraFOVDefault = DEFAULT_FIELD_OF_VIEW;
- mCosHalfCameraFOV = cosf(mCameraFOVDefault * 0.5f);
- mPixelMeterRatio = 0.f;
- mScreenPixelArea = 0;
- mZoomFactor = 1.f;
- mZoomSubregion = 1;
- mAverageSpeed = 0.f;
- mAverageAngularSpeed = 0.f;
- 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);
- mVelocityDir = center - last_position ;
- F32 dpos = mVelocityDir.normVec() ;
- 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);
-
- mAverageSpeed = mVelocityStat.getMeanPerSec() ;
- mAverageAngularSpeed = mAngularVelocityStat.getMeanPerSec() ;
- mCosHalfCameraFOV = cosf(0.5f * getView() * llmax(1.0f, getAspect()));
- // 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->getWindowWidthScaled() - 0.5f,
- (F32)(y_from_bot - height / 2) / (F32)gViewerWindow->getWindowHeightScaled() - 0.5f,
- (F32)(x + width / 2) / (F32)gViewerWindow->getWindowWidthScaled() - 0.5f,
- (F32)(y_from_bot + height / 2) / (F32)gViewerWindow->getWindowHeightScaled() - 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->getWorldViewRectRaw();
- 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_rect = gViewerWindow->getWorldViewRectScaled();
- // convert to pixel coordinates
- S32 int_x = lltrunc(x);
- S32 int_y = lltrunc(y);
- BOOL valid = TRUE;
- if (clamp)
- {
- if (int_x < world_rect.mLeft)
- {
- out_point.mX = world_rect.mLeft;
- valid = FALSE;
- }
- else if (int_x > world_rect.mRight)
- {
- out_point.mX = world_rect.mRight;
- valid = FALSE;
- }
- else
- {
- out_point.mX = int_x;
- }
- if (int_y < world_rect.mBottom)
- {
- out_point.mY = world_rect.mBottom;
- valid = FALSE;
- }
- else if (int_y > world_rect.mTop)
- {
- out_point.mY = world_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_rect.mLeft)
- {
- valid = FALSE;
- }
- else if (int_x > world_rect.mRight)
- {
- valid = FALSE;
- }
- if (int_y < world_rect.mBottom)
- {
- valid = FALSE;
- }
- else if (int_y > world_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->getWorldViewRectRaw();
- 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->getWorldViewRectScaled();
- // ...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;
- mCosHalfCameraFOV = cosf(mCameraFOVDefault * 0.5f);
- }
- // static
- void LLViewerCamera::updateCameraAngle( void* user_data, const LLSD& value)
- {
- LLViewerCamera* self=(LLViewerCamera*)user_data;
- self->setDefaultFOV(value.asReal());
- }