assimp/port/jAssimp/jni_bridge/JNIMesh.cpp

/*
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Open Asset Import Library (ASSIMP)
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Copyright (c) 2006-2008, ASSIMP Development Team

All rights reserved.

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* Redistributions of source code must retain the above
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  following disclaimer.

* Redistributions in binary form must reproduce the above
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  derived from this software without specific prior
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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*/

/** @file Implementation of the JNI API for jAssimp */

#include "JNIEnvironment.h"
#include "JNILogger.h"

using namespace Assimp;

namespace Assimp	{
namespace JNIBridge		{

// ------------------------------------------------------------------------------------------------
void JNIEnvironment::_assimp::_Mesh::Initialize()
{
	JNIEnv* pc = JJNIEnvironment::Get()->GetThread()->m_pcEnv;

	// load a handle to the class
	if(!(this->Class = pc->FindClass("assimp.Mesh")))
		JNIEnvironment::Get()->ThrowNativeError("Unable to load class assimp.mesh");

	// load all fields of the class
	this->m_vVertices	= pc->GetFieldID(Class,"m_vVertices","[F");
	this->m_vNormals	= pc->GetFieldID(Class,"m_vNormals","[F");
	this->m_vTangents	= pc->GetFieldID(Class,"m_vTangents","[F");
	this->m_vBitangents = pc->GetFieldID(Class,"m_vBitangents","[F");
	this->m_avColors	= pc->GetFieldID(Class,"m_avColors","[[F");
	this->m_avUVs		= pc->GetFieldID(Class,"m_avColors","[[F");
	this->m_vFaces		= pc->GetFieldID(Class,"m_vFaces","[I");
	this->m_vBones		= pc->GetFieldID(Class,"m_vBones","[Lassimp.Bone;");

	this->m_aiNumUVComponents	= pc->GetFieldID(Class,"m_aiNumUVComponents","[I");
	this->m_iMaterialIndex		= pc->GetFieldID(Class,"m_iMaterialIndex","I");

	// check whether all fields have been loaded properly
	if (!this->m_vVertices		|| !this->m_vNormals	|| !this->m_vTangents ||
		!this->m_vBitangents	|| !this->m_avColors	|| !this->m_avUVs ||
		!this->m_vFaces			|| !this->m_vBones		|| !this->m_aiNumUVComponents ||
		!this->m_iMaterialIndex)
	{
		JNIEnvironment::Get()->ThrowNativeError("Unable to load all fields of class assimp.mesh");
	}
}
// ------------------------------------------------------------------------------------------------
void JNIEnvironment::_assimp::_Mesh::Fill(jobject obj,const aiMesh* pcSrc)
{
	JNIEnv* pc = JJNIEnvironment::Get()->GetThread()->m_pcEnv;
	
	// set the material index
	pc->SetIntField(obj,this->m_iMaterialIndex,pcSrc->mMaterialIndex);


	// allocate the arrays and fill them
	float* pf;
	const unsigned int size = pcSrc->mNumVertices*12;
	const unsigned int size2 = pcSrc->mNumVertices*3;

	// copy vertex positions
	if (pcSrc->HasPositions())
	{
		// allocate and copy data
		jfloatArray jfl = pc->NewFloatArray(size2);	
		JNU_CopyDataToArray(jfl,pcSrc->mVertices,size);

		// set the corresponding field in the java object
		pc->SetObjectField(obj,this->m_vVertices,jfl);
	}
	// copy vertex normals
	if (pcSrc->HasNormals())
	{
		// allocate and copy data
		jfloatArray jfl = pc->NewFloatArray(size2);	
		JNU_CopyDataToArray(jfl,pcSrc->mNormals,size);

		// set the corresponding field in the java object
		pc->SetObjectField(obj,this->m_vNormals,jfl);	
	}
	// copy tangents and bitangents
	if (pcSrc->HasTangentsAndBitangents())
	{
		// allocate and copy data
		jfloatArray jfl = pc->NewFloatArray(size2);	
		JNU_CopyDataToArray(jfl,pcSrc->mTangents,size);

		// set the corresponding field in the java object
		pc->SetObjectField(obj,this->m_vTangents,jfl);

		jfl = pc->NewFloatArray(size2);	
		JNU_CopyDataToArray(jfl,pcSrc->mBitangents,size);

		// set the corresponding field in the java object
		pc->SetObjectField(obj,this->m_vBitangents,jfl);
	}
	// copy texture coordinates
	if (pcSrc->HasTextureCoords(0))
	{
		jobjectArray jobjarr = pc->NewObjectArray(AI_MAX_NUMBER_OF_TEXTURECOORDS,
			AIJ_GET_HANDLE(java.lang.Array.FloatArray_Class),0);

		unsigned int channel = 0;
		while (pcSrc->HasTextureCoords(channel))
		{
			jfloatArray jfl = pc->NewFloatArray(size2);	
			JNU_CopyDataToArray(jfl,pcSrc->mTextureCoords[channel],size);

			pc->SetObjectArrayElement(jobjarr,channel,jfl)
			++channel;
		}

		// set the corresponding field in the java object
		pc->SetObjectField(obj,this->m_avUVs,jobjarr);

		jobjarr = (jobjectArray)  pc->NewIntArray(AI_MAX_NUMBER_OF_TEXTURECOORDS);
		pc->SetIntArrayRegion((jintArray)jobjarr,0,channel,&pcSrc->mNumUVComponents);
		pc->SetObjectField(obj,this->m_aiNumUVComponents,jobjarr);
	}
	// copy vertex colors
	if (pcSrc->HasVertexColors(0))
	{
		const unsigned int size = pcSrc->mNumVertices<<4;
		const unsigned int size2 = pcSrc->mNumVertices<<2;

		jobjectArray jobjarr = pc->NewObjectArray(AI_MAX_NUMBER_OF_COLOR_SETS,
			AIJ_GET_HANDLE(java.lang.Array.FloatArray_Class),0);

		unsigned int channel = 0;
		while (pcSrc->HasVertexColors(channel))
		{
			jfloatArray jfl = pc->NewFloatArray(size2);	
			JNU_CopyDataToArray(jfl,pcSrc->mColors[channel],size);

			pc->SetObjectArrayElement(jobjarr,channel,jfl);
			++channel;
		}

		// set the corresponding field in the java object
		pc->SetObjectField(obj,this->m_avColors,jobjarr);
	}


	// copy faces
	if (0 < pcSrc->mNumFaces) // just for safety
	{
		const unsigned int size = pcSrc->mNumFaces*12;
		const unsigned int size2 = pcSrc->mNumFaces*3;

		// allocate and copy data
		jintArray jil = pc->NewIntArray(size2);	

		int* pf;
		jboolean iscopy = FALSE;

		// lock the array and get direct access to its buffer
		if(!pf = pc->GetPrimitiveArrayCritical(jil,&iscopy))
			JNIEnvironment::Get()->ThrowNativeError("Unable to lock face array");

		// copy the data to the array - face by face
		const aiFace** const pcEnd = pcSrc->mFaces+pcSrc->mNumFaces;
		for (const aiFace* pcCur = pcSrc->mFaces;pcCur != pcEnd;++pcCur)
		{
			ai_assert(3 == pcCur->mNumIndices);
			*pf++ = pcCur->mIndices[0];
			*pf++ = pcCur->mIndices[1];
			*pf++ = pcCur->mIndices[2];
		}

		// release our reference to the array
		pc->ReleasePrimitiveArrayCritical(jil,pf,0);

		// set the corresponding field in the java object
		pc->SetObjectField(obj,this->m_vFaces,jil);
	}

	// copy bones
	if (pcSrc->mNumBones)
	{
		// allocate the array
		jobjectArray jarr = pc->NewObjectArray(pcSrc->mNumBones,
			AIJ_GET_HANDLE(assimp.Bone.Class),0);

		// and fill all members
		for (unsigned int i = 0; i < pcSrc->mNumBones;++i)
		{
			// allocate the array element
			jobject jobj = pc->NewObject(AIJ_GET_CLASS_HANDLE(assimp.Bone),
				AIJ_GET_DEFAULT_CTOR_HANDLE(assimp.Bone));

			// fill it from the native data
			JNIEnvironment::Get()->assimp.Bone.Fill(jobj,pcSrc->mBones[i]);

			// and set the corresponding array entry
			pc->SetObjectArrayElement(jarr,i,jobj);
		}

		// set the corresponding field in the java object
		pc->SetObjectField(obj,this->m_vBones,jil);
	}
}

}}