SH-1225 Import convex hull data from .slm

2 files changed, 175 insertions, 11 deletions

diff --git a/indra/llprimitive/llmodel.cpp b/indra/llprimitive/llmodel.cpp
index 81420fadb7..595f9aa307 100755
--- a/indra/llprimitive/llmodel.cpp
+++ b/indra/llprimitive/llmodel.cpp
@@ -1881,24 +1881,29 @@ LLModel::weight_list& LLModel::getJointInfluences(const LLVector3& pos)
 void LLModel::setConvexHullDecomposition(
 	const LLModel::convex_hull_decomposition& decomp)
 {
-	mConvexHullDecomp = decomp;
+	mPhysics.mHull = decomp;
+	mPhysics.mMesh.clear();
+	updateHullCenters();
+}
 
-	mHullCenter.resize(mConvexHullDecomp.size());
+void LLModel::updateHullCenters()
+{
+	mHullCenter.resize(mPhysics.mHull.size());
 	mHullPoints = 0;
 	mCenterOfHullCenters.clear();
 
-	for (U32 i = 0; i < decomp.size(); ++i)
+	for (U32 i = 0; i < mPhysics.mHull.size(); ++i)
 	{
 		LLVector3 cur_center;
 
-		for (U32 j = 0; j < decomp[i].size(); ++j)
+		for (U32 j = 0; j < mPhysics.mHull[i].size(); ++j)
 		{
-			cur_center += decomp[i][j];
+			cur_center += mPhysics.mHull[i][j];
 		}
 		mCenterOfHullCenters += cur_center;
-		cur_center *= 1.f/decomp[i].size();
+		cur_center *= 1.f/mPhysics.mHull[i].size();
 		mHullCenter[i] = cur_center;
-		mHullPoints += decomp[i].size();
+		mHullPoints += mPhysics.mHull[i].size();
 	}
 
 	mCenterOfHullCenters *= 1.f / mHullPoints;
@@ -1944,12 +1949,15 @@ bool LLModel::loadModel(std::istream& is)
 		std::ios::pos_type cur_pos = is.tellg();

 		loadSkinInfo(header, is);

 		is.seekg(cur_pos);

+	}

+

+	if (lod == LLModel::LOD_PHYSICS)

+	{

+		std::ios::pos_type cur_pos = is.tellg();

 		loadDecomposition(header, is);

 		is.seekg(cur_pos);

 	}

 

-	

-

 	is.seekg(header[nm[lod]]["offset"].asInteger(), std::ios_base::cur);

 

 	if (unpackVolumeFaces(is, header[nm[lod]]["size"].asInteger()))

@@ -2019,6 +2027,22 @@ bool LLModel::loadSkinInfo(LLSD& header, std::istream &is)
 
 bool LLModel::loadDecomposition(LLSD& header, std::istream& is)
 {
+	S32 offset = header["decomposition"]["offset"].asInteger();
+	S32 size = header["decomposition"]["size"].asInteger();
+
+	if (offset >= 0 && size > 0)
+	{
+		is.seekg(offset, std::ios_base::cur);
+
+		LLSD data;
+
+		if (unzip_llsd(data, is, size))
+		{
+			mPhysics.fromLLSD(data);
+			updateHullCenters();
+		}
+	}
+
 	return true;
 }
 
@@ -2133,3 +2157,104 @@ LLSD LLMeshSkinInfo::asLLSD(bool include_joints) const
 	return ret;
 }
 
+LLModel::Decomposition::Decomposition(LLSD& data)
+{
+	fromLLSD(data);
+}
+
+void LLModel::Decomposition::fromLLSD(LLSD& decomp)
+{
+	if (decomp.has("HullList"))
+	{
+		// updated for const-correctness. gcc is picky about this type of thing - Nyx
+		const LLSD::Binary& hulls = decomp["HullList"].asBinary();
+		const LLSD::Binary& position = decomp["Position"].asBinary();
+
+		U16* p = (U16*) &position[0];
+
+		mHull.resize(hulls.size());
+
+		LLVector3 min;
+		LLVector3 max;
+		LLVector3 range;
+
+		min.setValue(decomp["Min"]);
+		max.setValue(decomp["Max"]);
+		range = max-min;
+
+		for (U32 i = 0; i < hulls.size(); ++i)
+		{
+			U16 count = (hulls[i] == 0) ? 256 : hulls[i];
+			
+			for (U32 j = 0; j < count; ++j)
+			{
+				mHull[i].push_back(LLVector3(
+					(F32) p[0]/65535.f*range.mV[0]+min.mV[0],
+					(F32) p[1]/65535.f*range.mV[1]+min.mV[1],
+					(F32) p[2]/65535.f*range.mV[2]+min.mV[2]));
+				p += 3;
+			}		 
+
+		}
+	}
+
+	if (decomp.has("Hull"))
+	{
+		const LLSD::Binary& position = decomp["Hull"].asBinary();
+
+		U16* p = (U16*) &position[0];
+
+		LLVector3 min;
+		LLVector3 max;
+		LLVector3 range;
+
+		min.setValue(decomp["Min"]);
+		max.setValue(decomp["Max"]);
+		range = max-min;
+
+		U16 count = position.size()/6;
+		
+		for (U32 j = 0; j < count; ++j)
+		{
+			mBaseHull.push_back(LLVector3(
+				(F32) p[0]/65535.f*range.mV[0]+min.mV[0],
+				(F32) p[1]/65535.f*range.mV[1]+min.mV[1],
+				(F32) p[2]/65535.f*range.mV[2]+min.mV[2]));
+			p += 3;
+		}		 
+	}
+	else
+	{
+		//empty base hull mesh to indicate decomposition has been loaded
+		//but contains no base hull
+		mBaseHullMesh.clear();;
+	}
+
+}
+
+void LLModel::Decomposition::merge(const LLModel::Decomposition* rhs)
+{
+	if (!rhs)
+	{
+		return;
+	}
+
+	if (mMeshID != rhs->mMeshID)
+	{
+		llerrs << "Attempted to merge with decomposition of some other mesh." << llendl;
+	}
+
+	if (mBaseHull.empty())
+	{ //take base hull and decomposition from rhs
+		mHull = rhs->mHull;
+		mBaseHull = rhs->mBaseHull;
+		mMesh = rhs->mMesh;
+		mBaseHullMesh = rhs->mBaseHullMesh;
+	}
+
+	if (mPhysicsShapeMesh.empty())
+	{ //take physics shape mesh from rhs
+		mPhysicsShapeMesh = rhs->mPhysicsShapeMesh;
+	}
+}
+
diff --git a/indra/llprimitive/llmodel.h b/indra/llprimitive/llmodel.h
index 81be9d1835..e9450d2967 100755
--- a/indra/llprimitive/llmodel.h
+++ b/indra/llprimitive/llmodel.h
@@ -27,6 +27,7 @@
 #ifndef LL_LLMODEL_H
 #define LL_LLMODEL_H
 
+#include "llpointer.h"
 #include "llvolume.h"
 #include "v4math.h"
 #include "m4math.h"
@@ -54,7 +55,6 @@ public:
 	float mPelvisOffset;
 };
 
-
 class LLModel : public LLVolume
 {
 public:
@@ -208,9 +208,10 @@ public:
 	float	mPelvisOffset;
 	// convex hull decomposition
 	S32 mDecompID;
-	convex_hull_decomposition mConvexHullDecomp;
+	
 	void setConvexHullDecomposition(
 		const convex_hull_decomposition& decomp);
+	void updateHullCenters();
 
 	LLVector3 mCenterOfHullCenters;
 	std::vector<LLVector3> mHullCenter;
@@ -219,6 +220,44 @@ public:
 	//ID for storing this model in a .slm file
 	S32 mLocalID;
 
+	class PhysicsMesh
+	{
+	public:
+		std::vector<LLVector3> mPositions;
+		std::vector<LLVector3> mNormals;
+
+		void clear()
+		{
+			mPositions.clear();
+			mNormals.clear();
+		}
+
+		bool empty() const
+		{
+			return mPositions.empty();
+		}
+	};
+
+	class Decomposition
+	{
+	public:
+		Decomposition() { }
+		Decomposition(LLSD& data);
+		void fromLLSD(LLSD& data);
+		
+		void merge(const Decomposition* rhs);
+
+		LLUUID mMeshID;
+		LLModel::convex_hull_decomposition mHull;
+		LLModel::hull mBaseHull;
+
+		std::vector<LLModel::PhysicsMesh> mMesh;
+		LLModel::PhysicsMesh mBaseHullMesh;
+		LLModel::PhysicsMesh mPhysicsShapeMesh;
+	};
+
+	Decomposition mPhysics;
+
 protected:
 	void addVolumeFacesFromDomMesh(domMesh* mesh);
 	virtual BOOL createVolumeFacesFromDomMesh(domMesh *mesh);