3dsmodel.cpp

3ds 文件读取程序

// 3DSModel.cpp: implementation of the C3DSModel class.
//    
//     沈阳蓝雨视景科技
//     http://www.bvrain.com
//     [e-mail]  [e-mail]
//     13998383976
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "3DSModel.h"

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
C3DSModel::C3DSModel()
{
	m_sFileName[0]=0;
	m_bModelOK=FALSE;

	m_3DModel.numOfMaterials=0;
	m_3DModel.numOfObjects=0;
	m_3DModel.vctMaterials.clear();
	m_3DModel.vctObjects.clear();
}
C3DSModel::~C3DSModel()
{

	for(int i = 0; i < m_3DModel.numOfObjects; i++)
	{
		// Free the faces, normals, vertices, and texture coordinates.
		delete [] m_3DModel.vctObjects[i].pFaces;
		delete [] m_3DModel.vctObjects[i].pNormals;
		delete [] m_3DModel.vctObjects[i].pVerts;
		delete [] m_3DModel.vctObjects[i].pTexVerts;
		for(int j=0;j<m_3DModel.vctObjects[i].numOfMaterials;j++)
			delete[] m_3DModel.vctObjects[i].pMaterialREFS[j].pFaceIndexs;
		delete [] m_3DModel.vctObjects[i].pMaterialREFS;
	}

}
//绘制模型
BOOL C3DSModel::Draw()
{
	CLoad3DS::tMatREF *pmatref;
	CLoad3DS::t3DObject *pObject;

	// Since we know how many objects our model has, go through each of them.
	for(int i = 0; i < m_3DModel.numOfObjects; i++)
	{
		// Get the current object that we are displaying
		pObject = &m_3DModel.vctObjects[i];
		//对所有的子材料
		for(int imat=0;imat<pObject->numOfMaterials;imat++)
		{
			pmatref=&pObject->pMaterialREFS[imat];;
			if(pmatref->bHasTexture) 
			{
				glEnable(GL_TEXTURE_2D);
				glColor3ub(255, 255, 255);
				glBindTexture(GL_TEXTURE_2D, m_3DModel.vctMaterials[pmatref->nMaterialID].texureId);//g_Texture[pObject->materialID]);
			} 
			else 
			{
				glDisable(GL_TEXTURE_2D);
				glColor3ub(255, 255, 255);
			}	
			//开始绘制一个子物体
			glBegin(GL_TRIANGLES);// Begin drawing with our selected mode (triangles or lines)
			// Go through all of the faces (polygons) of the object and draw them
			for(int nfindex = 0,j=0; nfindex < pmatref->nFaceNum; nfindex++)
			{
				j=int(pmatref->pFaceIndexs[nfindex]);

				// Go through each corner of the triangle and draw it.
				for(int whichVertex = 0; whichVertex < 3; whichVertex++)
				{
					// Get the index for each point of the face
					int index = pObject->pFaces[j].vertIndex[whichVertex];
			
					// Give OpenGL the normal for this vertex.
					glNormal3f(pObject->pNormals[ index ].x, pObject->pNormals[ index ].y, pObject->pNormals[ index ].z);
				
					// If the object has a texture associated with it, give it a texture coordinate.
					if(pmatref->bHasTexture)// pObject->bHasTexture) {
					{
						// Make sure there was a UVW map applied to the object or else it won't have tex coords.
						if(pObject->pTexVerts) {
							glTexCoord2f(pObject->pTexVerts[ index ].x, pObject->pTexVerts[ index ].y);
						}
					} 
					else 
					{
						if(m_3DModel.numOfMaterials>0 && pmatref->nMaterialID>=0)//pObject->materialID >= 0) 
						{
							// Get and set the color that the object is, since it must not have a texture
							BYTE *pColor = m_3DModel.vctMaterials[pmatref->nMaterialID].color;
							// Assign the current color to this model
							glColor3ub(pColor[0], pColor[1], pColor[2]);
						}
					}
					glVertex3f(pObject->pVerts[ index ].x, pObject->pVerts[ index ].y, pObject->pVerts[ index ].z);
				}
			}

			glEnd();				
			
		}
	}
	return TRUE;
}
// 载入模型文件
BOOL C3DSModel::LoadModelFromFile(char* sfilename)
{
//静态序号
	static int ntextID=0;
	char stmp[512];
	//把文件名连接到媒体路径，成为完整路径
	strcpy(m_sFileName,sfilename);
	strcpy(stmp,g_sMediaPath);
	strcat(stmp,sfilename);
	
	//在这使用加载类
	CLoad3DS cLoad3ds;
	//载入文件
	if(cLoad3ds.Import3DS(&m_3DModel, stmp)==false)	
	{
		//失败
		m_bModelOK=FALSE;
		return FALSE;
	}
	//成功
	for(int i = 0; i < m_3DModel.numOfMaterials; i++)
	{
		// Check to see if there is a file name to load in this material
		if(strlen(m_3DModel.vctMaterials[i].strFile) > 0)
		{
			strcpy(stmp,g_sMediaPath);
			strcat(stmp,m_3DModel.vctMaterials[i].strFile);
			//此处改动，设置材料号
			CreateTexture(g_Texture,stmp , ntextID);	
			m_3DModel.vctMaterials[i].texureId = g_Texture[ntextID];
			ntextID++;

		}
		else
			m_3DModel.vctMaterials[i].texureId = 0;
	}
	m_bModelOK=TRUE;
	return TRUE;
}