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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/llhudeffectpointat.cpp
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@@ -53,7 +53,7 @@ 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;
// timeouts
// can't use actual F32_MAX, because we add this to the current frametime
@@ -251,7 +251,7 @@ BOOL LLHUDEffectPointAt::setPointAt(EPointAtType target_type, LLViewerObject *ob
BOOL targetTypeChanged = (target_type != mTargetType) ||
(object != mTargetObject);
BOOL targetPosChanged = (dist_vec(position, mLastSentOffsetGlobal) > MIN_DELTAPOS_FOR_UPDATE) &&
BOOL targetPosChanged = (dist_vec_squared(position, mLastSentOffsetGlobal) > MIN_DELTAPOS_FOR_UPDATE_SQUARED) &&
((current_time - mLastSendTime) > (1.f / MAX_SENDS_PER_SEC));
if (targetTypeChanged || targetPosChanged)