diff options
Diffstat (limited to 'indra/newview/llface.cpp')
| -rw-r--r-- | indra/newview/llface.cpp | 157 |
1 files changed, 155 insertions, 2 deletions
diff --git a/indra/newview/llface.cpp b/indra/newview/llface.cpp index 4246cbc27f..edadc3dcf7 100644 --- a/indra/newview/llface.cpp +++ b/indra/newview/llface.cpp @@ -52,6 +52,7 @@ #include "llvovolume.h" #include "pipeline.h" #include "llviewerregion.h" +#include "llviewerwindow.h" #define LL_MAX_INDICES_COUNT 1000000 @@ -175,6 +176,9 @@ void LLFace::init(LLDrawable* drawablep, LLViewerObject* objp) mLastIndicesCount = mIndicesCount; mLastIndicesIndex = mIndicesIndex; + mImportanceToCamera = 0.f ; + mBoundingSphereRadius = 0.0f ; + mAtlasInfop = NULL ; mUsingAtlas = FALSE ; } @@ -186,6 +190,7 @@ void LLFace::destroy() { mTexture->removeFace(this) ; } + if (mDrawPoolp) { mDrawPoolp->removeFace(this); @@ -207,7 +212,7 @@ void LLFace::destroy() } } } - + setDrawInfo(NULL); removeAtlas(); @@ -256,6 +261,7 @@ void LLFace::setPool(LLFacePool* new_pool, LLViewerTexture *texturep) } mDrawPoolp = new_pool; } + setTexture(texturep) ; } @@ -750,7 +756,9 @@ BOOL LLFace::genVolumeBBoxes(const LLVolume &volume, S32 f, } mCenterLocal = (newMin+newMax)*0.5f; - + LLVector3 tmp = (newMin - newMax) ; + mBoundingSphereRadius = tmp.length() * 0.5f ; + updateCenterAgent(); } @@ -1305,6 +1313,151 @@ BOOL LLFace::getGeometryVolume(const LLVolume& volume, return TRUE; } +const F32 LEAST_IMPORTANCE = 0.05f ; +const F32 LEAST_IMPORTANCE_FOR_LARGE_IMAGE = 0.3f ; + +F32 LLFace::getTextureVirtualSize() +{ + F32 radius; + F32 cos_angle_to_view_dir; + mPixelArea = calcPixelArea(cos_angle_to_view_dir, radius); + + if (mPixelArea <= 0) + { + return 0.f; + } + + //get area of circle in texture space + LLVector2 tdim = mTexExtents[1] - mTexExtents[0]; + F32 texel_area = (tdim * 0.5f).lengthSquared()*3.14159f; + if (texel_area <= 0) + { + // Probably animated, use default + texel_area = 1.f; + } + + //apply texel area to face area to get accurate ratio + //face_area /= llclamp(texel_area, 1.f/64.f, 16.f); + F32 face_area = mPixelArea / llclamp(texel_area, 0.015625f, 128.f); + + if(face_area > LLViewerTexture::sMaxSmallImageSize) + { + if(mImportanceToCamera < LEAST_IMPORTANCE) //if the face is not important, do not load hi-res. + { + static const F32 MAX_LEAST_IMPORTANCE_IMAGE_SIZE = 128.0f * 128.0f ; + face_area = llmin(face_area * 0.5f, MAX_LEAST_IMPORTANCE_IMAGE_SIZE) ; + } + else if(face_area > LLViewerTexture::sMinLargeImageSize) //if is large image, shrink face_area by considering the partial overlapping. + { + if(mImportanceToCamera < LEAST_IMPORTANCE_FOR_LARGE_IMAGE)//if the face is not important, do not load hi-res. + { + face_area = LLViewerTexture::sMinLargeImageSize ; + } + else if(mTexture.notNull() && mTexture->isLargeImage()) + { + face_area *= adjustPartialOverlapPixelArea(cos_angle_to_view_dir, radius ); + } + } + } + + return face_area; +} + +F32 LLFace::calcPixelArea(F32& cos_angle_to_view_dir, F32& radius) +{ + //get area of circle around face + LLVector3 center = getPositionAgent(); + LLVector3 size = (mExtents[1] - mExtents[0]) * 0.5f; + + LLVector3 lookAt = center - LLViewerCamera::getInstance()->getOrigin(); + F32 dist = lookAt.normVec() ; + + //get area of circle around node + F32 app_angle = atanf(size.length()/dist); + radius = app_angle*LLDrawable::sCurPixelAngle; + F32 face_area = radius*radius * 3.14159f; + + if(dist < mBoundingSphereRadius) //camera is very close + { + cos_angle_to_view_dir = 1.0f ; + mImportanceToCamera = 1.0f ; + } + else + { + cos_angle_to_view_dir = lookAt * LLViewerCamera::getInstance()->getXAxis() ; + mImportanceToCamera = LLFace::calcImportanceToCamera(cos_angle_to_view_dir, dist) ; + } + + return face_area ; +} + +//the projection of the face partially overlaps with the screen +F32 LLFace::adjustPartialOverlapPixelArea(F32 cos_angle_to_view_dir, F32 radius ) +{ + F32 screen_radius = (F32)llmax(gViewerWindow->getWindowDisplayWidth(), gViewerWindow->getWindowDisplayHeight()) ; + F32 center_angle = acosf(cos_angle_to_view_dir) ; + F32 d = center_angle * LLDrawable::sCurPixelAngle ; + + if(d + radius > screen_radius + 5.f) + { + //---------------------------------------------- + //calculate the intersection area of two circles + //F32 radius_square = radius * radius ; + //F32 d_square = d * d ; + //F32 screen_radius_square = screen_radius * screen_radius ; + //face_area = + // radius_square * acosf((d_square + radius_square - screen_radius_square)/(2 * d * radius)) + + // screen_radius_square * acosf((d_square + screen_radius_square - radius_square)/(2 * d * screen_radius)) - + // 0.5f * sqrtf((-d + radius + screen_radius) * (d + radius - screen_radius) * (d - radius + screen_radius) * (d + radius + screen_radius)) ; + //---------------------------------------------- + + //the above calculation is too expensive + //the below is a good estimation: bounding box of the bounding sphere: + F32 alpha = 0.5f * (radius + screen_radius - d) / radius ; + alpha = llclamp(alpha, 0.f, 1.f) ; + return alpha * alpha ; + } + return 1.0f ; +} + +const S8 FACE_IMPORTANCE_LEVEL = 4 ; +const F32 FACE_IMPORTANCE_TO_CAMERA_OVER_DISTANCE[FACE_IMPORTANCE_LEVEL][2] = //{distance, importance_weight} + {{16.1f, 1.0f}, {32.1f, 0.5f}, {48.1f, 0.2f}, {96.1f, 0.05f} } ; +const F32 FACE_IMPORTANCE_TO_CAMERA_OVER_ANGLE[FACE_IMPORTANCE_LEVEL][2] = //{cos(angle), importance_weight} + {{0.985f /*cos(10 degrees)*/, 1.0f}, {0.94f /*cos(20 degrees)*/, 0.8f}, {0.866f /*cos(30 degrees)*/, 0.64f}, {0.0f, 0.36f}} ; + +//static +F32 LLFace::calcImportanceToCamera(F32 cos_angle_to_view_dir, F32 dist) +{ + F32 importance = 0.f ; + + if(cos_angle_to_view_dir > LLViewerCamera::getInstance()->getCosHalfFov() && + dist < FACE_IMPORTANCE_TO_CAMERA_OVER_DISTANCE[FACE_IMPORTANCE_LEVEL - 1][0]) + { + F32 camera_moving_speed = LLViewerCamera::getInstance()->getAverageSpeed() ; + F32 camera_angular_speed = LLViewerCamera::getInstance()->getAverageAngularSpeed(); + + if(camera_moving_speed > 10.0f || camera_angular_speed > 1.0f) + { + //if camera moves or rotates too fast, ignore the importance factor + return 0.f ; + } + + //F32 camera_relative_speed = camera_moving_speed * (lookAt * LLViewerCamera::getInstance()->getVelocityDir()) ; + + S32 i = 0 ; + for(i = 0; i < FACE_IMPORTANCE_LEVEL && dist > FACE_IMPORTANCE_TO_CAMERA_OVER_DISTANCE[i][0]; ++i); + i = llmin(i, FACE_IMPORTANCE_LEVEL - 1) ; + F32 dist_factor = FACE_IMPORTANCE_TO_CAMERA_OVER_DISTANCE[i][1] ; + + for(i = 0; i < FACE_IMPORTANCE_LEVEL && cos_angle_to_view_dir < FACE_IMPORTANCE_TO_CAMERA_OVER_ANGLE[i][0] ; ++i) ; + i = llmin(i, FACE_IMPORTANCE_LEVEL - 1) ; + importance = dist_factor * FACE_IMPORTANCE_TO_CAMERA_OVER_ANGLE[i][1] ; + } + + return importance ; +} + BOOL LLFace::verify(const U32* indices_array) const { BOOL ok = TRUE; |