Fix SpeedTree LOD strip handling to render all strips per LOD

2026-02-15 15:40:54 +03:00
parent acb0ac0af5
commit cfe3c3cb7c
2 changed files with 144 additions and 73 deletions
--- a/src/SpeedTreeLib/SpeedTreeWrapper.cpp
+++ b/src/SpeedTreeLib/SpeedTreeWrapper.cpp
@@ -1,4 +1,4 @@
-///////////////////////////////////////////////////////////////////////  
+///////////////////////////////////////////////////////////////////////  
 //	CSpeedTreeWrapper Class
 //
 //	(c) 2003 IDV, Inc.
@@ -65,10 +65,8 @@ m_bIsInstance(false),
 m_pInstanceOf(NULL),
 m_pGeometryCache(NULL),
 m_usNumLeafLods(0),
-m_pBranchIndexCounts(NULL),
 m_pBranchIndexBuffer(NULL),
 m_pBranchVertexBuffer(NULL),
-m_pFrondIndexCounts(NULL),
 m_pFrondIndexBuffer(NULL),
 m_pFrondVertexBuffer(NULL),
 m_pLeafVertexBuffer(NULL),
@@ -101,7 +99,7 @@ void CSpeedTreeWrapper::OnRenderPCBlocker()
 	
 	CSpeedTreeForestDirectX8::Instance().UpdateSystem(ELTimer_GetMSec() / 1000.0f);
 	
-	// <EFBFBD>ϳ<EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><> <20><><EFBFBD><EFBFBD> LOD <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>
+	// ï¿½Ï³ï¿½ï¿½ï¿½ ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ ï¿½ï¿½ ï¿½ï¿½ï¿½ï¿½ LOD ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ ï¿½ï¿½ï¿½ï¿½
 	m_pSpeedTree->SetLodLevel(1.0f);
 	//Advance();
 	
@@ -244,7 +242,7 @@ void CSpeedTreeWrapper::OnRender()
 	
 	CSpeedTreeForestDirectX8::Instance().UpdateSystem(ELTimer_GetMSec() / 1000.0f);
 	
-	// <EFBFBD>ϳ<EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><> <20><><EFBFBD><EFBFBD> LOD <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>
+	// ï¿½Ï³ï¿½ï¿½ï¿½ ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ ï¿½ï¿½ ï¿½ï¿½ï¿½ï¿½ LOD ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ ï¿½ï¿½ï¿½ï¿½
 	m_pSpeedTree->SetLodLevel(1.0f);
 	//Advance();
 	
@@ -314,14 +312,12 @@ CSpeedTreeWrapper::~CSpeedTreeWrapper()
 		{
 			SAFE_RELEASE(m_pBranchVertexBuffer);
 			SAFE_RELEASE(m_pBranchIndexBuffer);
-			SAFE_DELETE_ARRAY(m_pBranchIndexCounts);
 		}
 		
 		if (m_unFrondVertexCount > 0)
 		{	
 			SAFE_RELEASE(m_pFrondVertexBuffer);
 			SAFE_RELEASE(m_pFrondIndexBuffer);
-			SAFE_DELETE_ARRAY(m_pFrondIndexCounts);
 		}
 		
 		for (short i = 0; i < m_usNumLeafLods; ++i)
@@ -544,32 +540,58 @@ void CSpeedTreeWrapper::SetupBranchBuffers(void)
 			m_pBranchVertexBuffer->Unlock();
 		}
 		
-		// create and fill the index counts for each LOD
-		UINT unNumLodLevels = m_pSpeedTree->GetNumBranchLodLevels();
-		m_pBranchIndexCounts = new unsigned short[unNumLodLevels];
-		for (UINT i = 0; i < unNumLodLevels; ++i)
-		{
-			// force update for particular LOD
-			m_pSpeedTree->GetGeometry(*m_pGeometryCache, SpeedTree_BranchGeometry, i);
+		const uint32_t unNumLodLevels = m_pSpeedTree->GetNumBranchLodLevels();
+		m_branchStripOffsets.clear();
+		m_branchStripLengths.clear();
+		if (unNumLodLevels > 0)
+			m_branchStripLengths.resize(unNumLodLevels);

-			// check if this LOD has branches
-			if (pBranches->m_usNumStrips > 0)
-				m_pBranchIndexCounts[i] = pBranches->m_pStripLengths[0];
-			else
-				m_pBranchIndexCounts[i] = 0;
+		// set LOD0 for strip offsets/index buffer sizing
+		m_pSpeedTree->GetGeometry(*m_pGeometryCache, SpeedTree_BranchGeometry, 0);
+		const uint32_t stripCount = pBranches->m_usNumStrips;
+		uint32_t totalIndexCount = 0;
+		if (stripCount > 0)
+		{
+			m_branchStripOffsets.resize(stripCount);
+			for (uint32_t s = 0; s < stripCount; ++s)
+			{
+				m_branchStripOffsets[s] = totalIndexCount;
+				totalIndexCount += pBranches->m_pStripLengths[s];
+			}
 		}
-		// set back to highest LOD
+
+		for (uint32_t i = 0; i < unNumLodLevels; ++i)
+		{
+			m_pSpeedTree->GetGeometry(*m_pGeometryCache, SpeedTree_BranchGeometry, i);
+			auto& lengths = m_branchStripLengths[i];
+			lengths.assign(stripCount, 0);
+			const uint32_t lodStripCount = pBranches->m_usNumStrips;
+			for (uint32_t s = 0; s < stripCount && s < lodStripCount; ++s)
+			{
+				lengths[s] = pBranches->m_pStripLengths[s];
+			}
+		}
+		// set back to highest LOD for buffer fill
 		m_pSpeedTree->GetGeometry(*m_pGeometryCache, SpeedTree_BranchGeometry, 0);

-		// the first LOD level contains the most indices of all the levels, so
-		// we use its size to allocate the index buffer
-		ms_lpd3dDevice->CreateIndexBuffer(m_pBranchIndexCounts[0] * sizeof(unsigned short), D3DUSAGE_WRITEONLY, D3DFMT_INDEX16, D3DPOOL_DEFAULT, &m_pBranchIndexBuffer, NULL);
+		if (totalIndexCount > 0)
+		{
+			// the first LOD level contains the most indices of all the levels, so
+			// we use its size to allocate the index buffer
+			ms_lpd3dDevice->CreateIndexBuffer(totalIndexCount * sizeof(uint16_t), D3DUSAGE_WRITEONLY, D3DFMT_INDEX16, D3DPOOL_DEFAULT, &m_pBranchIndexBuffer, NULL);
 			
-		// fill the index buffer
-		unsigned short* pIndexBuffer = NULL;
-		m_pBranchIndexBuffer->Lock(0, 0, reinterpret_cast<void**>(&pIndexBuffer), 0);
-		memcpy(pIndexBuffer, pBranches->m_pStrips[0], pBranches->m_pStripLengths[0] * sizeof(unsigned short));
-		m_pBranchIndexBuffer->Unlock();
+			// fill the index buffer
+			uint16_t* pIndexBuffer = NULL;
+			m_pBranchIndexBuffer->Lock(0, 0, reinterpret_cast<void**>(&pIndexBuffer), 0);
+			uint32_t cursor = 0;
+			for (uint32_t s = 0; s < stripCount; ++s)
+			{
+				const uint32_t length = pBranches->m_pStripLengths[s];
+				memcpy(pIndexBuffer + cursor, pBranches->m_pStrips[s], length * sizeof(uint16_t));
+				cursor += length;
+			}
+			m_pBranchIndexBuffer->Unlock();
+		}
 	}
 }

@@ -629,32 +651,58 @@ void CSpeedTreeWrapper::SetupFrondBuffers(void)
 		}
 		m_pFrondVertexBuffer->Unlock();
 		
-		// create and fill the index counts for each LOD
-		UINT unNumLodLevels = m_pSpeedTree->GetNumFrondLodLevels();
-		m_pFrondIndexCounts = new unsigned short[unNumLodLevels];
-		for (WORD j = 0; j < unNumLodLevels; ++j)
-		{
-			// force update for this LOD
-			m_pSpeedTree->GetGeometry(*m_pGeometryCache, SpeedTree_FrondGeometry, -1, j);
+		const uint32_t unNumLodLevels = m_pSpeedTree->GetNumFrondLodLevels();
+		m_frondStripOffsets.clear();
+		m_frondStripLengths.clear();
+		if (unNumLodLevels > 0)
+			m_frondStripLengths.resize(unNumLodLevels);

-			// check if this LOD has fronds
-			if (pFronds->m_usNumStrips > 0)
-				m_pFrondIndexCounts[j] = pFronds->m_pStripLengths[0];
-			else
-				m_pFrondIndexCounts[j] = 0;
+		// set LOD0 for strip offsets/index buffer sizing
+		m_pSpeedTree->GetGeometry(*m_pGeometryCache, SpeedTree_FrondGeometry, -1, 0);
+		const uint32_t stripCount = pFronds->m_usNumStrips;
+		uint32_t totalIndexCount = 0;
+		if (stripCount > 0)
+		{
+			m_frondStripOffsets.resize(stripCount);
+			for (uint32_t s = 0; s < stripCount; ++s)
+			{
+				m_frondStripOffsets[s] = totalIndexCount;
+				totalIndexCount += pFronds->m_pStripLengths[s];
+			}
 		}
-		// go back to highest LOD
+
+		for (uint32_t j = 0; j < unNumLodLevels; ++j)
+		{
+			m_pSpeedTree->GetGeometry(*m_pGeometryCache, SpeedTree_FrondGeometry, -1, j);
+			auto& lengths = m_frondStripLengths[j];
+			lengths.assign(stripCount, 0);
+			const uint32_t lodStripCount = pFronds->m_usNumStrips;
+			for (uint32_t s = 0; s < stripCount && s < lodStripCount; ++s)
+			{
+				lengths[s] = pFronds->m_pStripLengths[s];
+			}
+		}
+		// go back to highest LOD for buffer fill
 		m_pSpeedTree->GetGeometry(*m_pGeometryCache, SpeedTree_FrondGeometry, -1, 0);
 		
-		// the first LOD level contains the most indices of all the levels, so
-		// we use its size to allocate the index buffer
-		ms_lpd3dDevice->CreateIndexBuffer(m_pFrondIndexCounts[0] * sizeof(unsigned short), D3DUSAGE_WRITEONLY, D3DFMT_INDEX16, D3DPOOL_DEFAULT, &m_pFrondIndexBuffer, NULL);
+		if (totalIndexCount > 0)
+		{
+			// the first LOD level contains the most indices of all the levels, so
+			// we use its size to allocate the index buffer
+			ms_lpd3dDevice->CreateIndexBuffer(totalIndexCount * sizeof(uint16_t), D3DUSAGE_WRITEONLY, D3DFMT_INDEX16, D3DPOOL_DEFAULT, &m_pFrondIndexBuffer, NULL);
 			
-		// fill the index buffer
-		unsigned short * pIndexBuffer = NULL;
-		m_pFrondIndexBuffer->Lock(0, 0, reinterpret_cast<void**>(&pIndexBuffer), 0);
-		memcpy(pIndexBuffer, pFronds->m_pStrips[0], pFronds->m_pStripLengths[0] * sizeof(unsigned short));
-		m_pFrondIndexBuffer->Unlock();
+			// fill the index buffer
+			uint16_t * pIndexBuffer = NULL;
+			m_pFrondIndexBuffer->Lock(0, 0, reinterpret_cast<void**>(&pIndexBuffer), 0);
+			uint32_t cursor = 0;
+			for (uint32_t s = 0; s < stripCount; ++s)
+			{
+				const uint32_t length = pFronds->m_pStripLengths[s];
+				memcpy(pIndexBuffer + cursor, pFronds->m_pStrips[s], length * sizeof(uint16_t));
+				cursor += length;
+			}
+			m_pFrondIndexBuffer->Unlock();
+		}
 	}
 }

@@ -787,12 +835,14 @@ CSpeedTreeWrapper::SpeedTreeWrapperPtr CSpeedTreeWrapper::MakeInstance()
 		
 		// use the same buffers
 		spInstance->m_pBranchIndexBuffer = m_pBranchIndexBuffer;
-		spInstance->m_pBranchIndexCounts = m_pBranchIndexCounts;
+		spInstance->m_branchStripOffsets = m_branchStripOffsets;
+		spInstance->m_branchStripLengths = m_branchStripLengths;
 		spInstance->m_pBranchVertexBuffer = m_pBranchVertexBuffer;
 		spInstance->m_unBranchVertexCount = m_unBranchVertexCount;
 		
 		spInstance->m_pFrondIndexBuffer = m_pFrondIndexBuffer;
-		spInstance->m_pFrondIndexCounts = m_pFrondIndexCounts;
+		spInstance->m_frondStripOffsets = m_frondStripOffsets;
+		spInstance->m_frondStripLengths = m_frondStripLengths;
 		spInstance->m_pFrondVertexBuffer = m_pFrondVertexBuffer;
 		spInstance->m_unFrondVertexCount = m_unFrondVertexCount;
 		
@@ -908,19 +958,27 @@ void CSpeedTreeWrapper::RenderBranches(void) const
 {
 	m_pSpeedTree->GetGeometry(*m_pGeometryCache, SpeedTree_BranchGeometry);
 	
-	if (m_pGeometryCache->m_fBranchAlphaTestValue)
+	if (m_pGeometryCache->m_sBranches.m_usVertexCount > 0 && m_pBranchIndexBuffer && !m_branchStripLengths.empty() && !m_branchStripOffsets.empty())
 	{
+		const int lod = m_pGeometryCache->m_sBranches.m_nDiscreteLodLevel;
+		if (lod < 0 || static_cast<size_t>(lod) >= m_branchStripLengths.size())
+			return;
+
 		PositionTree();
 		
 		// set alpha test value
 		STATEMANAGER.SetRenderState(D3DRS_ALPHAREF, DWORD(m_pGeometryCache->m_fBranchAlphaTestValue));
 		
-		// render if this LOD has branches
-		if (m_pBranchIndexCounts && 
-			m_pBranchIndexCounts[m_pGeometryCache->m_sBranches.m_nDiscreteLodLevel] > 0)
+		const auto& lengths = m_branchStripLengths[lod];
+		const size_t stripCount = lengths.size() < m_branchStripOffsets.size() ? lengths.size() : m_branchStripOffsets.size();
+		for (size_t s = 0; s < stripCount; ++s)
 		{
-			ms_faceCount += m_pBranchIndexCounts[m_pGeometryCache->m_sBranches.m_nDiscreteLodLevel] - 2;
-			STATEMANAGER.DrawIndexedPrimitive(D3DPT_TRIANGLESTRIP, 0, m_pGeometryCache->m_sBranches.m_usVertexCount, 0, m_pBranchIndexCounts[m_pGeometryCache->m_sBranches.m_nDiscreteLodLevel] - 2);
+			const uint16_t stripLength = lengths[s];
+			if (stripLength > 2)
+			{
+				ms_faceCount += stripLength - 2;
+				STATEMANAGER.DrawIndexedPrimitive(D3DPT_TRIANGLESTRIP, 0, m_pGeometryCache->m_sBranches.m_usVertexCount, m_branchStripOffsets[s], stripLength - 2);
+			}
 		}
 	}
 }
@@ -981,19 +1039,27 @@ void CSpeedTreeWrapper::RenderFronds(void) const
 {
 	m_pSpeedTree->GetGeometry(*m_pGeometryCache, SpeedTree_FrondGeometry);
 	
-	if (m_pGeometryCache->m_fFrondAlphaTestValue > 0.0f)
+	if (m_pGeometryCache->m_sFronds.m_usVertexCount > 0 && m_pFrondIndexBuffer && !m_frondStripLengths.empty() && !m_frondStripOffsets.empty())
 	{
+		const int lod = m_pGeometryCache->m_sFronds.m_nDiscreteLodLevel;
+		if (lod < 0 || static_cast<size_t>(lod) >= m_frondStripLengths.size())
+			return;
+
 		PositionTree();
 		
 		// set alpha test value
 		STATEMANAGER.SetRenderState(D3DRS_ALPHAREF, DWORD(m_pGeometryCache->m_fFrondAlphaTestValue));
 		
-		// render if this LOD has fronds
-		if (m_pFrondIndexCounts &&
-			m_pFrondIndexCounts[m_pGeometryCache->m_sFronds.m_nDiscreteLodLevel] > 0)
+		const auto& lengths = m_frondStripLengths[lod];
+		const size_t stripCount = lengths.size() < m_frondStripOffsets.size() ? lengths.size() : m_frondStripOffsets.size();
+		for (size_t s = 0; s < stripCount; ++s)
 		{
-			ms_faceCount += m_pFrondIndexCounts[m_pGeometryCache->m_sFronds.m_nDiscreteLodLevel] - 2;
-			STATEMANAGER.DrawIndexedPrimitive(D3DPT_TRIANGLESTRIP, 0, m_pGeometryCache->m_sFronds.m_usVertexCount, 0, m_pFrondIndexCounts[m_pGeometryCache->m_sFronds.m_nDiscreteLodLevel] - 2);
+			const uint16_t stripLength = lengths[s];
+			if (stripLength > 2)
+			{
+				ms_faceCount += stripLength - 2;
+				STATEMANAGER.DrawIndexedPrimitive(D3DPT_TRIANGLESTRIP, 0, m_pGeometryCache->m_sFronds.m_usVertexCount, m_frondStripOffsets[s], stripLength - 2);
+			}
 		}
 	}
 }
@@ -1455,3 +1521,4 @@ void CSpeedTreeWrapper::OnUpdateCollisionData(const CStaticCollisionDataVector *
 		AddCollision(&CollisionData, &mat);
 	}
 }
+
--- a/src/SpeedTreeLib/SpeedTreeWrapper.h
+++ b/src/SpeedTreeLib/SpeedTreeWrapper.h
@@ -1,4 +1,4 @@
-///////////////////////////////////////////////////////////////////////  
+///////////////////////////////////////////////////////////////////////  
 //	SpeedTreeRTExample Class
 //
 //	(c) 2003 IDV, Inc.
@@ -43,6 +43,7 @@
 #include <d3dx9.h>
 #include <vector>
 #include <memory>
+#include <cstdint>

 #include "EterLib/GrpObjectInstance.h"
 #include "EterLib/GrpImageInstance.h"
@@ -91,8 +92,8 @@ public:
 	virtual void				SetPosition(float x, float y, float z);
 	virtual void				CalculateBBox();

-	virtual void				OnRender(); // Render 시에 메소드, 그러나 프리뷰나 특수한 경우에만 직접 Render 콜을 부르며 
-											// 그 이외에는 RenderBranches, RenderFronds 등의 메소드를 CSpeedTreeForest에서 호출한다.
+	virtual void				OnRender(); // Render ½Ã¿¡ ¸Þ¼Òµå, ±×·¯³ª ÇÁ¸®ºä³ª Æ¯¼öÇÑ °æ¿ì¿¡¸¸ Á÷Á¢ Render ÄÝÀ» ºÎ¸£¸ç 
+											// ±× ÀÌ¿Ü¿¡´Â RenderBranches, RenderFronds µîÀÇ ¸Þ¼Òµå¸¦ CSpeedTreeForest¿¡¼ È£ÃâÇÑ´Ù.
 	virtual void				OnBlendRender() {}
 	virtual void				OnRenderToShadowMap() {}
 	virtual void				OnRenderShadow() {}
@@ -172,13 +173,15 @@ private:
 	LPDIRECT3DVERTEXBUFFER9			m_pBranchVertexBuffer;			// branch vertex buffer
 	unsigned int					m_unBranchVertexCount;			// number of vertices in branches
 	LPDIRECT3DINDEXBUFFER9			m_pBranchIndexBuffer;			// branch index buffer
-	unsigned short*					m_pBranchIndexCounts;			// number of indexes per branch LOD level
+	std::vector<uint32_t>			m_branchStripOffsets;			// strip start indices (LOD0 ordering)
+	std::vector<std::vector<uint16_t>> m_branchStripLengths;			// [lod][strip] index counts
 	
 	// frond buffers
 	LPDIRECT3DVERTEXBUFFER9			m_pFrondVertexBuffer;			// frond vertex buffer
 	unsigned int					m_unFrondVertexCount;			// number of vertices in frond
 	LPDIRECT3DINDEXBUFFER9			m_pFrondIndexBuffer;			// frond index buffer
-	unsigned short*					m_pFrondIndexCounts;			// number of indexes per frond LOD level
+	std::vector<uint32_t>			m_frondStripOffsets;			// strip start indices (LOD0 ordering)
+	std::vector<std::vector<uint16_t>> m_frondStripLengths;			// [lod][strip] index counts
 	
 	// leaf buffers
 	unsigned short					m_usNumLeafLods;				// the number of leaf LODs
@@ -205,3 +208,4 @@ private:
 };

 #pragma warning(pop)
+