[StreamDisplay] Added VelocityMultiplier, VelocityMin, VelocityMax, SpringMultiplier and ViscosityMultiplier metrics.

Docs/Changelog_sm5.txt

@@ -8,9 +8,14 @@ ________________________________________________________________________________
 StepMania 5.0 $next | 20111xxx
 --------------------------------------------------------------------------------
 
+2011/12/16
+----------
+* [StreamDisplay] Added VelocityMultiplier, VelocityMin, VelocityMax,
+  SpringMultiplier and ViscosityMultiplier metrics. [AJ]
+
 2011/12/12
 ----------
-* [ScreenEdit] Add the GAMESTATE:InStepEditor LUA binding. [Wolfman2000]
+* [ScreenEdit] Add the GAMESTATE:InStepEditor Lua binding. [Wolfman2000]
 * [Player, ScreenGameplay] Allow failing on Oni without crashing. This one
   took awhile. [Wolfman2000]
 * [LifeMeterBattery] Fixed various issues (lives not fully disappearing on fail,

Themes/_fallback/metrics.ini

@@ -1339,6 +1339,11 @@ NumPills=20
 UseThreePartMethod=false
 ThreePartWidth=128
 AlwaysBounceNormalBar=false
+VelocityMultiplier=4
+VelocityMin=-.06
+VelocityMax=.02
+SpringMultiplier=2.0
+ViscosityMultiplier=0.2
 
 [TextBanner]
 TitleOnCommand=

src/StreamDisplay.cpp

@@ -29,6 +29,11 @@ void StreamDisplay::Load( const RString &_sMetricsGroup )
 	RString sMetricsGroup = "StreamDisplay";
 
 	m_transformPill.SetFromReference( THEME->GetMetricR(sMetricsGroup,"PillTransformFunction") );
+	VELOCITY_MULTIPLIER.Load(sMetricsGroup, "VelocityMultiplier");
+	VELOCITY_MIN.Load(sMetricsGroup, "VelocityMin");
+	VELOCITY_MAX.Load(sMetricsGroup, "VelocityMax");
+	SPRING_MULTIPLIER.Load(sMetricsGroup, "SpringMultiplier");
+	VISCOSITY_MULTIPLIER.Load(sMetricsGroup, "ViscosityMultiplier");
 
 	float fTextureCoordScaleX = THEME->GetMetricF(sMetricsGroup,"TextureCoordScaleX");
 	int iNumPills = static_cast<int>(THEME->GetMetricF(sMetricsGroup,"NumPills"));
@@ -71,19 +76,19 @@ void StreamDisplay::Update( float fDeltaSecs )
 			if( fabsf(fDelta) < 0.00001f )
 				m_fVelocity = 0; // prevent div/0
 			else
-				m_fVelocity = (fDelta / fabsf(fDelta)) * 4;
+				m_fVelocity = (fDelta / fabsf(fDelta)) * VELOCITY_MULTIPLIER;
 		}
 		else
 		{
-			const float fSpringForce = fDelta * 2.0f;
+			const float fSpringForce = fDelta * SPRING_MULTIPLIER;
 			m_fVelocity += fSpringForce * fDeltaSecs;
 
-			const float fViscousForce = -m_fVelocity * 0.2f;
+			const float fViscousForce = -m_fVelocity * VISCOSITY_MULTIPLIER;
 			if( !m_bAlwaysBounce )
 				m_fVelocity += fViscousForce * fDeltaSecs;
 		}
 
-		CLAMP( m_fVelocity, -.06f, +.02f );
+		CLAMP( m_fVelocity, VELOCITY_MIN, VELOCITY_MAX );
 
 		m_fTrailingPercent += m_fVelocity * fDeltaSecs;
 	}

src/StreamDisplay.h

@@ -6,6 +6,7 @@
 #include "Sprite.h"
 #include "Quad.h"
 #include "LuaExpressionTransform.h"
+#include "ThemeMetric.h"
 
 enum StreamType
 {
@@ -34,6 +35,11 @@ private:
 	vector<Sprite*>	m_vpSprPill[NUM_StreamType];
 
 	LuaExpressionTransform		m_transformPill;	// params: self,offsetFromCenter,itemIndex,numItems
+	ThemeMetric<float> VELOCITY_MULTIPLIER;
+	ThemeMetric<float> VELOCITY_MIN;
+	ThemeMetric<float> VELOCITY_MAX;
+	ThemeMetric<float> SPRING_MULTIPLIER;
+	ThemeMetric<float> VISCOSITY_MULTIPLIER;
 
 	float m_fPercent;	// percent filled
 	float m_fTrailingPercent;	// this approaches m_fPercent, use this value to draw