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// CMs3dLoader.cpp: implementation of the CMs3dLoader2 class. 
// 
////////////////////////////////////////////////////////////////////// 
 
#include "stdafx.h" 
#include "Ms3dLoader.h" 
#include "stdio.h" 
#include "texture.h" 
#include "cmath.h" 
////////////////////////////////////////////////////////////////////// 
// Construction/Destruction 
////////////////////////////////////////////////////////////////////// 
// File header 
 
///////////////////////////////////////////// 
CMs3dLoader::CMs3dLoader() 
{ 
	m_numMeshes = 0; 
	m_pMeshes = NULL; 
	m_numTriangles = 0; 
	m_pTriangles = NULL; 
	m_numVertices = 0; 
	m_pVertices = NULL; 
	m_numTexture=0; 
	m_pTexture=NULL; 
} 
 
CMs3dLoader::~CMs3dLoader() 
{ 
	unsigned short i; 
	for ( i = 0; i < m_numMeshes; i++ ) 
		delete[] m_pMeshes[i].m_pTriangleIndices; 
 
	m_numMeshes = 0; 
	if ( m_pMeshes != NULL ) 
	{ 
		delete[] m_pMeshes; 
		m_pMeshes = NULL; 
	} 
 
	m_numTriangles = 0; 
	if ( m_pTriangles != NULL ) 
	{ 
		delete [] m_pTriangles; 
		m_pTriangles = NULL; 
	} 
 
	m_numVertices = 0; 
	if ( m_pVertices != NULL ) 
	{ 
		delete [] m_pVertices; 
		m_pVertices = NULL; 
	} 
	m_numTexture=0; 
	if(m_pTexture != NULL) 
	{ 
		delete [] m_pTexture; 
		m_pTexture = NULL; 
	} 
} 
 
bool CMs3dLoader::Load( const char *filename ) 
{ 
	FILE* file; 
	//Open the .ms3d model file 
	if((file= fopen(filename, "rb"))==NULL) 
		return false; 
		 
	MS3DHeader Header ; 
	fread(&Header.m_ID, sizeof(char), 10, file); 
	fread(&Header.m_version, sizeof(int), 1, file); 
	if ( strncmp( Header.m_ID, "MS3D000000", 10 ) != 0 ) 
	{  
		MessageBox(NULL,"id error","ERROR",MB_OK|MB_ICONEXCLAMATION); 
		fclose(file); 
		return false; // "Not a valid Milkshape3D model file." 
	} 
	if ( Header.m_version < 3 ||Header.m_version > 4 ) 
	{ 
		MessageBox(NULL,"version error","ERROR",MB_OK|MB_ICONEXCLAMATION); 
		fclose(file); 
		return false; // "Unhandled file version. Only Milkshape3D Version 1.3 and 1.4 is supported." ); 
	} 
 
	fread(&m_numVertices, sizeof(unsigned short), 1, file); 
 
	m_pVertices = new Vertex[m_numVertices]; 
	MS3DVertex ms3dVertex; 
	for (unsigned short i = 0; i < m_numVertices; i++ ) 
	{ 
        fread( &ms3dVertex.m_flags,    sizeof(unsigned char),1,file); 
        fread(  ms3dVertex.m_vertex,   sizeof(float),        3,file); 
        fread( &ms3dVertex.m_refCount, sizeof(unsigned char),1,file); 
        fread( &ms3dVertex.m_boneID,   sizeof(char),         1,file); 
        /////////////data copy 
		memcpy( m_pVertices[i].m_location, ms3dVertex.m_vertex, sizeof( float )*3 ); 
		///////////////zoom 
		m_pVertices[i].m_location[0] *=1.5f; 
		m_pVertices[i].m_location[1] *=1.5f; 
		m_pVertices[i].m_location[2] *=1.5f; 
 
 		if(m_pVertices[i].m_location[0]>m_boundary.maxx)m_boundary.maxx=m_pVertices[i].m_location[0]; 
		if(m_pVertices[i].m_location[0]m_boundary.maxy)m_boundary.maxy=m_pVertices[i].m_location[1]; 
		if(m_pVertices[i].m_location[1]m_boundary.maxz)m_boundary.maxz=m_pVertices[i].m_location[2]; 
		if(m_pVertices[i].m_location[2]0)return false; 
    return true; 
} 
 
void CMs3dLoader::DrawBoundary() 
{ 
	glDisable(GL_TEXTURE_2D); 
	glColor3f(1,1,1); 
	glBegin(GL_LINE_STRIP); 
	    glVertex3f(m_boundary.minx,m_boundary.miny,m_boundary.minz); 
	    glVertex3f(m_boundary.maxx,m_boundary.miny,m_boundary.minz); 
	    glVertex3f(m_boundary.maxx,m_boundary.miny,m_boundary.maxz); 
	    glVertex3f(m_boundary.minx,m_boundary.miny,m_boundary.maxz); 
	    glVertex3f(m_boundary.minx,m_boundary.miny,m_boundary.minz); 
 
	    glVertex3f(m_boundary.minx,m_boundary.maxy,m_boundary.minz); 
	    glVertex3f(m_boundary.maxx,m_boundary.maxy,m_boundary.minz); 
	    glVertex3f(m_boundary.maxx,m_boundary.maxy,m_boundary.maxz); 
	    glVertex3f(m_boundary.minx,m_boundary.maxy,m_boundary.maxz); 
	    glVertex3f(m_boundary.minx,m_boundary.maxy,m_boundary.minz); 
	glEnd(); 
	glBegin(GL_LINES); 
	    glVertex3f(m_boundary.maxx,m_boundary.miny,m_boundary.minz); 
	    glVertex3f(m_boundary.maxx,m_boundary.maxy,m_boundary.minz); 
 
	    glVertex3f(m_boundary.maxx,m_boundary.miny,m_boundary.maxz); 
	    glVertex3f(m_boundary.maxx,m_boundary.maxy,m_boundary.maxz); 
 
	    glVertex3f(m_boundary.minx,m_boundary.miny,m_boundary.maxz); 
	    glVertex3f(m_boundary.minx,m_boundary.maxy,m_boundary.maxz); 
	glEnd(); 
	glColor3f(1,1,1); 
}