pperhmpghosts.c

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class PPERequester_HMPGhosts extends PPERequester_GameplayBase
{
    protected bool m_PulseActive;
    protected float m_PulseProgress;
    
    protected ref array<float> m_ChannelWeights = { 0, 0, 0, 0 };
    protected ref array<float> m_ColorMod = { 1, 1, 1, 1 };
    
    protected bool m_Stopping;
    protected bool m_StopNext;
    protected float m_FadeOutTimeTarget;
    protected float m_FadingTimeElapsed;
    protected float m_FadingProgress;
    protected float m_ElapsedTime;
    
    override protected void OnStart(Param par = null)
    {
        super.OnStart(par);
        
        m_Stopping = false;
        m_StopNext = false;
        m_ElapsedTime = 0.0;
        m_FadingTimeElapsed = 0.0;
        m_FadingProgress = 0.0;
        
        //following changes only performed once, on start
        //noise
        float nScaleX = 0.05; //inverse scaling!
        float nScaleY = 0.05; //inverse scaling!
        //ghosts
        float gOffsetX = 30;
        float gOffsetY = 13;
        float gScaleX = 1;  //inverse scaling!
        float gScaleY = 1;  //inverse scaling!
        //color modulation
        m_ColorMod[0] = 0.8;
        m_ColorMod[1] = 0.8;
        m_ColorMod[2] = 0.8;
        m_ColorMod[3] = 0.85;
        
        SetTargetValueFloat(PostProcessEffectType.Ghost,PPEGhost.PARAM_NOISE_SCALE_X,false, nScaleX,PPEGhost.L_4_HMP,PPOperators.LOWEST);
        SetTargetValueFloat(PostProcessEffectType.Ghost,PPEGhost.PARAM_NOISE_SCALE_Y,false, nScaleY,PPEGhost.L_5_HMP,PPOperators.LOWEST);
        SetTargetValueFloat(PostProcessEffectType.Ghost,PPEGhost.PARAM_GHOST_OFFSET_X,false, gOffsetX,PPEGhost.L_6_HMP,PPOperators.ADD);
        SetTargetValueFloat(PostProcessEffectType.Ghost,PPEGhost.PARAM_GHOST_OFFSET_Y,false, gOffsetY,PPEGhost.L_7_HMP,PPOperators.ADD);
        SetTargetValueFloat(PostProcessEffectType.Ghost,PPEGhost.PARAM_GHOST_SCALE_X,false, gScaleX,PPEGhost.L_8_HMP,PPOperators.LOWEST);
        SetTargetValueFloat(PostProcessEffectType.Ghost,PPEGhost.PARAM_GHOST_SCALE_Y,false, gScaleY,PPEGhost.L_9_HMP,PPOperators.LOWEST);
        SetTargetValueColor(PostProcessEffectType.Ghost,PPEGhost.PARAM_GHOST_COLOR_MOD,m_ColorMod,PPEGhost.L_1_HMP,PPOperators.SET);
    }
    
    override protected void OnUpdate(float delta)
    {
        if (m_StopNext)
        {
            if (m_IsRunning)
                Stop();
            return;
        }
        
        if (m_IsRunning)
            ProcessSimulation(delta);
        
        super.OnUpdate(delta);
        
        if (m_IsRunning)
            SetRequesterUpdating(true);
    }
    
    protected void ProcessSimulation(float delta)
    {
        if (m_Stopping)
            ProcessFading(delta);
        
        if (m_PulseActive)
        {
            //channel weights
            float time = m_ElapsedTime * 0.65;
            SampleChannels(time);
            ReSampleChannels(time);
            
            //noise
            float nOffsetX = (Math.Sin( time * 0.29 ) * 0.5 + 0.5) * 0.3;
            float nOffsetY = (Math.Cos( time * 0.17 ) * 0.5 + 0.5) * 0.3;
            
            //channel remapping
            float animLo = (Math.Sin( time ) * 0.5 + 0.5) * 1;
            float animHi = (Math.Sin( time ) * 0.5 + 0.5) * 1;
            float rmpLoAll = Math.Lerp(0.1,0.3,animLo);
            float rmpHiAll = Math.Lerp(0.9,1.2,animHi);
            
            SetTargetValueColor(PostProcessEffectType.Ghost,PPEGhost.PARAM_NOISE_CHANNEL_WEIGHT,m_ChannelWeights,PPEGhost.L_1_HMP,PPOperators.SET);
            SetTargetValueFloat(PostProcessEffectType.Ghost,PPEGhost.PARAM_NOISE_OFFSET_X,false, nOffsetX,PPEGhost.L_2_HMP,PPOperators.ADD);
            SetTargetValueFloat(PostProcessEffectType.Ghost,PPEGhost.PARAM_NOISE_OFFSET_Y,false, nOffsetY,PPEGhost.L_3_HMP,PPOperators.ADD);
            SetTargetValueColor(PostProcessEffectType.Ghost,PPEGhost.PARAM_NOISE_REMAP_LO,{rmpLoAll,rmpLoAll,rmpLoAll,rmpLoAll},PPEGhost.L_1_HMP,PPOperators.SET);
            SetTargetValueColor(PostProcessEffectType.Ghost,PPEGhost.PARAM_NOISE_REMAP_HI,{rmpHiAll,rmpHiAll,rmpHiAll,rmpHiAll},PPEGhost.L_1_HMP,PPOperators.SET);
            
            m_PulseActive = m_PulseProgress < 1.0;
        }
        
        m_ElapsedTime += delta;
    }
    
    protected void SampleChannels(float time)
    {
        float offset;
        // luckily 4 channels * 90 fit into 360 nicely, so no need to distribute weights other way
        for (int i = 0; i < 4; ++i)
        {
            offset = i * Math.PI_HALF;
            m_ChannelWeights[i] = Math.Sin( time + offset );
        }
    }
    
    protected void ReSampleChannels(float time)
    {
        float rampingCoef = 1.1;
        float w = Math.Clamp((Math.Sin(m_PulseProgress * Math.PI) * rampingCoef),0,1);
        w = Math.Lerp(0,w,1 - m_FadingProgress);
        
        for (int i = 0; i < 4; ++i)
            m_ChannelWeights[i] = w * m_ChannelWeights[i];
    }
    
    protected void ProcessFading(float delta)
    {
        m_FadingTimeElapsed += delta;
        m_FadingProgress = m_FadingTimeElapsed/m_FadeOutTimeTarget;
        
        m_StopNext = m_FadingProgress >= 1.0;
    }
    
    void SetPulseProgress(float progress) //0..1
    {
        m_PulseActive = true;
        m_PulseProgress = progress;
    }
    
    void FadeOutEffect(float targetTime)
    {
        m_Stopping = true;
        m_FadeOutTimeTarget = targetTime;
        m_FadingTimeElapsed = 0.0;
    }
}