SCR_ZoomManualCameraComponent.c

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[BaseContainerProps(), SCR_BaseManualCameraComponentTitle()]
class SCR_ZoomManualCameraComponent : SCR_BaseManualCameraComponent
{
    protected static const float INERTIA_THRESHOLD = 0.001;
    
    [Attribute(defvalue: "1", uiwidget: UIWidgets.Slider, desc: "Minimum field of view", params: "0 180 1")]
    protected float m_fMinFOV;
    
    [Attribute(defvalue: "120", uiwidget: UIWidgets.Slider, desc: "Maximum field of view", params: "0 180 1")]
    protected float m_fMaxFOV;
    
    [Attribute(defvalue: "0.1", desc: "Zoom value coefficient")]
    protected float m_fCoef;
    
    [Attribute(defvalue: "0.08", desc: "Indertia strength. Larger values mean more inertia.")]
    protected float m_fInertiaStrength;
    
    protected float m_fTargetFOV;
    protected bool m_bIsAnimating;
    protected bool m_bIsInstant;
    protected ref ScriptInvoker m_OnZoomChange = new ScriptInvoker();
    
    //------------------------------------------------------------------------------------------------
    ScriptInvoker GetOnZoomChange()
    {
        return m_OnZoomChange;
    }
    
    //------------------------------------------------------------------------------------------------
    override void EOnCameraSave(SCR_ManualCameraComponentSave data)
    {
        if (m_fTargetFOV != 0)
            data.m_aValues = {m_fTargetFOV};
    }
 
    //------------------------------------------------------------------------------------------------
    override void EOnCameraLoad(SCR_ManualCameraComponentSave data)
    {
        m_fTargetFOV = data.m_aValues[0];
        m_bIsInstant = true;
    }
 
    //------------------------------------------------------------------------------------------------
    override void EOnCameraReset()
    {
        m_fTargetFOV = GetCameraEntity().GetDefaultFOV();
        m_bIsAnimating = true;
    }
 
    //------------------------------------------------------------------------------------------------
    override void EOnCameraFrame(SCR_ManualCameraParam param)
    {
        if (!param.isManualInputEnabled)
            return;
        
        if (GetInputManager().GetActionValue("ManualCameraZoomReset"))
        {
            m_fTargetFOV = GetCameraEntity().GetDefaultFOV();
            m_bIsAnimating = true;
        }
        
        float input = 0;
        if (GetInputManager().IsUsingMouseAndKeyboard() || GetInputManager().GetActionValue("ManualCameraModifier"))
            input = GetInputManager().GetActionValue("ManualCameraZoom");
        
        if (input != 0)
        {
            m_fTargetFOV = Math.Clamp(param.fov * (1 - input * m_fCoef), m_fMinFOV, m_fMaxFOV);
            m_bIsAnimating= true;
        }
        
        if (m_bIsInstant)
        {
            m_bIsInstant = false;
            param.fov = m_fTargetFOV;
            param.isDirty = true;
            m_OnZoomChange.Invoke(param.fov);
        }
        else if (m_bIsAnimating)
        {
            param.fov = Math.Lerp(param.fov, m_fTargetFOV, Math.Min(param.timeSlice / m_fInertiaStrength, 1));
            param.isDirty = true;
            if (Math.AbsFloat(param.fov - m_fTargetFOV) < INERTIA_THRESHOLD)
                m_bIsAnimating = false;
            
            m_OnZoomChange.Invoke(param.fov);
        }
    }
 
    //------------------------------------------------------------------------------------------------
    override bool EOnCameraInit()
    {
        return true;
    }
}