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Moving pow evaluation to const

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Jose Carlos 2014-02-16 21:33:46 +01:00
parent a8f1f9a00a
commit 73e0c0ccf5
1 changed files with 2 additions and 2 deletions
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4
interface/src/avatar/Avatar.cpp
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@ -57,6 +57,7 @@ const int NUM_BODY_CONE_SIDES = 9;
const float CHAT_MESSAGE_SCALE = 0.0015f;
const float CHAT_MESSAGE_HEIGHT = 0.1f;
const float DISPLAYNAME_FADEOUT_TIME = 0.5f;
const float DISPLAYNAME_FADEOUT_FACTOR = pow(0.01f, 1.0f / DISPLAYNAME_FADEOUT_TIME);
const float DISPLAYNAME_ALPHA = 0.95f;
Avatar::Avatar() :
@ -145,8 +146,7 @@ void Avatar::simulate(float deltaTime) {
if (!_isShowDisplayName && _displayNameAlpha > 0.0) {
// the alpha function is alpha = coef ^ time(zero based)
// We can make this function recursive: alpha(t) = alpha(t-dt) * coef^(dt)
float coef = pow(0.01f, 1.0f / DISPLAYNAME_FADEOUT_TIME);
_displayNameAlpha *= pow(coef, deltaTime);
_displayNameAlpha *= pow(DISPLAYNAME_FADEOUT_FACTOR, deltaTime);
_displayNameAlpha = _displayNameAlpha > 0.01? _displayNameAlpha : 0.0f; // The function is asymptotic to zero. 0.01 is 0 to us
}
}