Method CalcForce

XBOBTFF/FeedbackXBOEffect.cpp:169–281

}

void FeedbackXBOEffect::CalcForce(ULONG Duration, ULONG CurrentPos, LONG NormalRate, LONG AttackLevel, LONG FadeLevel, LONG * NormalLevel)
{
	LONG Magnitude = 0;
	LONG Period;
	LONG R;
	LONG Rate;
	
	if (CFEqual(Type, kFFEffectType_ConstantForce_ID)) {
		Magnitude	= DiConstantForce.lMagnitude;
		Magnitude	= ( Magnitude * NormalRate + AttackLevel + FadeLevel ) / 100;
	}
	else if (CFEqual(Type, kFFEffectType_Square_ID)) {
		Period	= max( (DWORD)1, ( DiPeriodic.dwPeriod / 1000 ) );
		R		= ( CurrentPos%Period) * 360 / Period;
		R	= ( R + ( DiPeriodic.dwPhase / 100 ) ) % 360;
		
		Magnitude	= DiPeriodic.dwMagnitude;
		Magnitude	= ( Magnitude * NormalRate + AttackLevel + FadeLevel ) / 100;
		
		if (180 <= R)
		{
			Magnitude = Magnitude * -1;
		}
		
		Magnitude	= Magnitude + DiPeriodic.lOffset;
	}
	else if (CFEqual(Type, kFFEffectType_Sine_ID)) {
		Period	= max( (DWORD)1, ( DiPeriodic.dwPeriod / 1000 ) );
		R		= (CurrentPos%Period) * 360 / Period;
		R		= ( R + ( DiPeriodic.dwPhase / 100 ) ) % 360;
		
		Magnitude	= DiPeriodic.dwMagnitude;
		Magnitude	= ( Magnitude * NormalRate + AttackLevel + FadeLevel ) / 100;
		
		Magnitude	= ( int)( Magnitude * sin( R * M_PI / 180.0 ) );
		
		Magnitude	= Magnitude + DiPeriodic.lOffset;
	}
	else if (CFEqual(Type, kFFEffectType_Triangle_ID)) {
		Period	= max( (DWORD)1, ( DiPeriodic.dwPeriod / 1000 ) );
		R		= (CurrentPos%Period) * 360 / Period;
		R		= ( R + ( DiPeriodic.dwPhase / 100 ) ) % 360;
		
		Magnitude	= DiPeriodic.dwMagnitude;
		Magnitude	= ( Magnitude * NormalRate + AttackLevel + FadeLevel ) / 100;
		
		if (0 <= R && R < 90)
		{
			Magnitude	= -Magnitude * ( 90 - R ) / 90;
		}
		if (90 <= R && R < 180)
		{
			Magnitude	= Magnitude * ( R - 90 ) / 90;
		}
		if (180 <= R && R < 270)
		{
			Magnitude	= Magnitude * ( 90 - ( R - 180 ) ) / 90;
		}