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Some nice dist^2 vector length checks to save from squarerooting.

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Shyotl
2011-05-28 01:49:32 -05:00
parent 71eec1caed
commit 799fe056a8
4 changed files with 16 additions and 17 deletions
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4
indra/newview/llhudeffectlookat.cpp
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@@ -67,7 +67,7 @@ const S32 PKT_SIZE = 57;
// throttle
const F32 MAX_SENDS_PER_SEC = 4.f;
const F32 MIN_DELTAPOS_FOR_UPDATE = 0.05f;
const F32 MIN_DELTAPOS_FOR_UPDATE_SQUARED = 0.05f * 0.05f;
const F32 MIN_TARGET_OFFSET_SQUARED = 0.0001f;
@@ -427,7 +427,7 @@ BOOL LLHUDEffectLookAt::setLookAt(ELookAtType target_type, LLViewerObject *objec
BOOL lookAtChanged = (target_type != mTargetType) || (object != mTargetObject);
// lookat position has moved a certain amount and we haven't just sent an update
lookAtChanged = lookAtChanged || ((dist_vec(position, mLastSentOffsetGlobal) > MIN_DELTAPOS_FOR_UPDATE) &&
lookAtChanged = lookAtChanged || ((dist_vec_squared(position, mLastSentOffsetGlobal) > MIN_DELTAPOS_FOR_UPDATE_SQUARED) &&
((current_time - mLastSendTime) > (1.f / MAX_SENDS_PER_SEC)));
if (lookAtChanged)