C4ObjectVisibility.cpp

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/*
 * OpenClonk, http://www.openclonk.org
 *
 * Copyright (c) 1998-2000, Matthes Bender
 * Copyright (c) 2001-2009, RedWolf Design GmbH, http://www.clonk.de/
 * Copyright (c) 2009-2016, The OpenClonk Team and contributors
 *
 * Distributed under the terms of the ISC license; see accompanying file
 * "COPYING" for details.
 *
 * "Clonk" is a registered trademark of Matthes Bender, used with permission.
 * See accompanying file "TRADEMARK" for details.
 *
 * To redistribute this file separately, substitute the full license texts
 * for the above references.
 */
 
/* Logic for C4Object: Light, audibility, visibility */
 
#include "C4Include.h"
#include "C4ForbidLibraryCompilation.h"
#include "object/C4Object.h"
 
#include "game/C4Application.h"
#include "landscape/fow/C4FoW.h"
#include "player/C4PlayerList.h"
 
 
bool C4Object::AssignLightRange()
{
    if (!lightRange && !lightFadeoutRange) return true;
 
    UpdateLight();
    return true;
}
 
bool C4Object::SetLightRange(int32_t iToRange, int32_t iToFadeoutRange)
{
    // set new range
    lightRange = iToRange;
    lightFadeoutRange = iToFadeoutRange;
    // resort into player's FoW-repeller-list
    UpdateLight();
    // success
    return true;
}
 
bool C4Object::SetLightColor(uint32_t iValue)
{
    // set new color value
    lightColor = iValue;
    // resort into player's FoW-repeller-list
    UpdateLight();
    // success
    return true;
}
 
void C4Object::UpdateLight()
{
    if (Landscape.HasFoW()) Landscape.GetFoW()->Add(this);
}
 
void C4Object::SetAudibilityAt(C4TargetFacet &cgo, int32_t iX, int32_t iY, int32_t player)
{
    // target pos (parallax)
    float offX, offY, newzoom;
    GetDrawPosition(cgo, iX, iY, cgo.Zoom, offX, offY, newzoom);
    int32_t audible_at_pos = Clamp(100 - 100 * Distance(cgo.X + cgo.Wdt / 2, cgo.Y + cgo.Hgt / 2, offX, offY) / 700, 0, 100);
    if (audible_at_pos > Audible)
    {
        Audible = audible_at_pos;
        AudiblePan = Clamp<int>(200 * (offX - cgo.X - (cgo.Wdt / 2)) / cgo.Wdt, -100, 100);
        AudiblePlayer = player;
    }
}
 
bool C4Object::IsVisible(int32_t iForPlr, bool fAsOverlay) const
{
    bool fDraw;
    C4Value vis;
    if (!GetProperty(P_Visibility, &vis))
        return true;
 
    int32_t Visibility;
    C4ValueArray *parameters = vis.getArray();
    if (parameters && parameters->GetSize())
    {
        Visibility = parameters->GetItem(0).getInt();
    }
    else
    {
        Visibility = vis.getInt();
    }
    // check layer
    if (Layer && Layer != this && !fAsOverlay)
    {
        fDraw = Layer->IsVisible(iForPlr, false);
        if (Layer->GetPropertyInt(P_Visibility) & VIS_LayerToggle) fDraw = !fDraw;
        if (!fDraw) return false;
    }
    // no flags set?
    if (!Visibility) return true;
    // check overlay
    if (Visibility & VIS_OverlayOnly)
    {
        if (!fAsOverlay) return false;
        if (Visibility == VIS_OverlayOnly) return true;
    }
    // editor visibility
    if (::Application.isEditor)
    {
        if (Visibility & VIS_Editor) return true;
    }
    // check visibility
    fDraw=false;
    if (Visibility & VIS_Owner) fDraw = fDraw || (iForPlr==Owner);
    if (iForPlr!=NO_OWNER)
    {
        // check all
        if (Visibility & VIS_Allies)  fDraw = fDraw || (iForPlr!=Owner && !Hostile(iForPlr, Owner));
        if (Visibility & VIS_Enemies) fDraw = fDraw || (iForPlr!=Owner && Hostile(iForPlr, Owner));
        if (parameters)
        {
            if (Visibility & VIS_Select)  fDraw = fDraw || parameters->GetItem(1+iForPlr).getBool();
        }
    }
    else fDraw = fDraw || (Visibility & VIS_God);
    return fDraw;
}