diff options
Diffstat (limited to 'indra/newview/llface.cpp')
| -rw-r--r-- | indra/newview/llface.cpp | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/indra/newview/llface.cpp b/indra/newview/llface.cpp index 7c25d14783..a3a3009820 100644 --- a/indra/newview/llface.cpp +++ b/indra/newview/llface.cpp @@ -930,6 +930,73 @@ LLVector2 LLFace::surfaceToTexture(LLVector2 surface_coord, LLVector3 position, return tc; } +// Returns scale compared to default texgen, and face orientation as calculated +// by planarProjection(). This is needed to match planar texgen parameters. +void LLFace::getPlanarProjectedParams(LLQuaternion* face_rot, LLVector3* face_pos, F32* scale) const +{ + const LLMatrix4& vol_mat = getWorldMatrix(); + const LLVolumeFace& vf = getViewerObject()->getVolume()->getVolumeFace(mTEOffset); + LLVector3 normal = vf.mVertices[0].mNormal; + LLVector3 binormal = vf.mVertices[0].mBinormal; + LLVector2 projected_binormal; + planarProjection(projected_binormal, normal, vf.mCenter, binormal); + projected_binormal -= LLVector2(0.5f, 0.5f); // this normally happens in xform() + *scale = projected_binormal.length(); + // rotate binormal to match what planarProjection() thinks it is, + // then find rotation from that: + projected_binormal.normalize(); + F32 ang = acos(projected_binormal.mV[VY]); + ang = (projected_binormal.mV[VX] < 0.f) ? -ang : ang; + binormal.rotVec(ang, normal); + LLQuaternion local_rot( binormal % normal, binormal, normal ); + *face_rot = local_rot * vol_mat.quaternion(); + *face_pos = vol_mat.getTranslation(); +} + +// Returns the necessary texture transform to align this face's TE to align_to's TE +bool LLFace::calcAlignedPlanarTE(const LLFace* align_to, LLVector2* res_st_offset, + LLVector2* res_st_scale, F32* res_st_rot) const +{ + if (!align_to) + { + return false; + } + const LLTextureEntry *orig_tep = align_to->getTextureEntry(); + if ((orig_tep->getTexGen() != LLTextureEntry::TEX_GEN_PLANAR) || + (getTextureEntry()->getTexGen() != LLTextureEntry::TEX_GEN_PLANAR)) + { + return false; + } + + LLVector3 orig_pos, this_pos; + LLQuaternion orig_face_rot, this_face_rot; + F32 orig_proj_scale, this_proj_scale; + align_to->getPlanarProjectedParams(&orig_face_rot, &orig_pos, &orig_proj_scale); + getPlanarProjectedParams(&this_face_rot, &this_pos, &this_proj_scale); + + // The rotation of "this face's" texture: + LLQuaternion orig_st_rot = LLQuaternion(orig_tep->getRotation(), LLVector3::z_axis) * orig_face_rot; + LLQuaternion this_st_rot = orig_st_rot * ~this_face_rot; + F32 x_ang, y_ang, z_ang; + this_st_rot.getEulerAngles(&x_ang, &y_ang, &z_ang); + *res_st_rot = z_ang; + + // Offset and scale of "this face's" texture: + LLVector3 centers_dist = (this_pos - orig_pos) * ~orig_st_rot; + LLVector3 st_scale(orig_tep->mScaleS, orig_tep->mScaleT, 1.f); + st_scale *= orig_proj_scale; + centers_dist.scaleVec(st_scale); + LLVector2 orig_st_offset(orig_tep->mOffsetS, orig_tep->mOffsetT); + + *res_st_offset = orig_st_offset + (LLVector2)centers_dist; + res_st_offset->mV[VX] -= (S32)res_st_offset->mV[VX]; + res_st_offset->mV[VY] -= (S32)res_st_offset->mV[VY]; + + st_scale /= this_proj_scale; + *res_st_scale = (LLVector2)st_scale; + return true; +} + void LLFace::updateRebuildFlags() { if (!mDrawablep->isState(LLDrawable::REBUILD_VOLUME)) |