[RELEASE] C++ Dynamic Shadows

[Nermin]

This should work for everyone Shadow/Bridge. If I have forgotten something and it does not work, please contact me. It is the simple version with isHeight & Normal.
Gyazo:

Show Spoiler

Code:

Show Spoiler

# Shadow System for isHeight Objects

## Overview
isHeight objects (bridges, platforms) receive shadows but do not cast shadows.

## Changes

### 1. ThingInstance.h

**File:** `/src/EterGrnLib/ThingInstance.h`

Add after `bool HaveBlendThing();`:
```cpp
bool HaveBlendThing();
bool IsHeightObject();
```

---

### 2. ThingInstance.cpp

**File:** `/src/EterGrnLib/ThingInstance.cpp`

Add after HaveBlendThing() method:
```cpp
bool CGraphicThingInstance::HaveBlendThing()
{
for (int i = 0; i < m_LODControllerVector.size(); i++)
{
if (m_LODControllerVector->HaveBlendThing())
return true;
}
return false;
}

bool CGraphicThingInstance::IsHeightObject()
{
return (m_pHeightAttributeInstance && m_pHeightAttributeInstance->IsHeightData());
}
```

---

### 3. Area.cpp

**File:** src/GameLib/Area.cpp`

In Refresh() method:
```cpp
if (pObjectInstance->isShadowFlag)
{
bool isHeightOnly = (pObjectInstance->pAttributeInstance &&
pObjectInstance->pAttributeInstance->IsHeightData());

if (!isHeightOnly)
{
m_ShadowThingCloneInstaceVector.push_back(pObjectInstance->pThingInstance);
}
}
```

---

### 4. MapOutdoorRender.cpp

**File:** GameLib/MapOutdoorRender.cpp`

Struct definition:
```cpp
struct CMapOutdoor_FOpaqueThingInstanceRenderWithShadow
{
LPDIRECT3DTEXTURE9 m_lpShadowTexture;

CMapOutdoor_FOpaqueThingInstanceRenderWithShadow(LPDIRECT3DTEXTURE9 lpShadowTex)
: m_lpShadowTexture(lpShadowTex) {}

inline void operator () (CGraphicThingInstance * pkThingInst)
{
if (pkThingInst->IsHeightObject())
{
STATEMANAGER.SetTexture(1, m_lpShadowTexture);
STATEMANAGER.SetTextureStageState(1, D3DTSS_COLORARG1, D3DTA_TEXTURE);
STATEMANAGER.SetTextureStageState(1, D3DTSS_COLORARG2, D3DTA_CURRENT);
STATEMANAGER.SetTextureStageState(1, D3DTSS_COLOROP, D3DTOP_MODULATE);
pkThingInst->RenderWithShadowTexture();
}
else
{
STATEMANAGER.SetTexture(1, NULL);
STATEMANAGER.SetTextureStageState(1, D3DTSS_COLOROP, D3DTOP_DISABLE);
pkThingInst->Render();
}
}
};
```

Function call:
```cpp
std::for_each(s_kVct_pkOpaqueThingInstSort.begin(),
s_kVct_pkOpaqueThingInstSort.end(),
CMapOutdoor_FOpaqueThingInstanceRenderWithShadow(m_lpCharacterShadowMapTexture));
```

---

### 5. AttributeInstance (if IsHeightData() is missing)

**File:** `client source 26.11/src/GameLib/AttributeInstance.cpp`

```cpp
bool CAttributeInstance::IsHeightData() const
{
if (!m_pAttributeData)
return false;

return m_pAttributeData->IsHeightData();
}
```

---

## Behavior

**Shadow Receiving:**
- isHeight objects: Receive shadows
- Normal buildings: Do not receive shadows

**Shadow Casting:**
- isHeight objects: Do not cast shadows
- Normal buildings: Cast shadows

---