SCR_MovementInertiaManualCameraComponent.c

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[BaseContainerProps(), SCR_BaseManualCameraComponentTitle()]
class SCR_MovementInertiaManualCameraComponent : SCR_BaseManualCameraComponent
{
    protected static const float INERTIA_THRESHOLD = 0.0002; //--- Squared value
    
    [Attribute(defvalue: "0.08", desc: "Inertia strength. Larger values mean more inertia.")]
    private float m_fInertiaStrength;
    
    private vector m_vVelocity;
    
    //------------------------------------------------------------------------------------------------
    override void EOnCameraFrame(SCR_ManualCameraParam param)
    {
        //--- Current velocity
        vector velocity = param.transform[3] - param.transformOriginal[3];
        
        //--- Terminate when target velocity was achieved
        if (!param.isManualInput && vector.DistanceSq(velocity, param.velocityOriginal) < INERTIA_THRESHOLD)
            return;
        
        //--- Apply
        float progress = Math.Min(param.timeSlice * m_fInertiaStrength, 1);
        velocity = vector.Lerp(param.velocityOriginal, velocity, progress);
        vector pos = param.transformOriginal[3] + velocity;
        
        param.transform[3] = pos;
        param.isDirty = true;
    }
 
    //------------------------------------------------------------------------------------------------
    override bool EOnCameraInit()
    {
        m_fInertiaStrength = 1 / Math.Max(m_fInertiaStrength, 0.001);
        return true;
    }
}