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3dObjectDisk.cpp：源码内容
							/////////////////////////////////////////////////////////////////////////////
// 3dObjectDisk.cpp : implementation file
//
// glOOP (OpenGL Object Oriented Programming library)
// Copyright (c) Craig Fahrnbach 1997, 1998
//
// OpenGL is a registered trademark of Silicon Graphics
//
//
// This program is provided for educational and personal use only and
// is provided without guarantee or warrantee expressed or implied.
//
// Commercial use is strickly prohibited without written permission
// from ImageWare Development.
//
// This program is -not- in the public domain.
//
/////////////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "glOOP.h"
#include "3dObjectDialog.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
//////////////////////////////////////////////////////////////////
// C3dObjectDisk
IMPLEMENT_DYNAMIC(C3dObjectDisk, C3dObject)
/////////////////////////////////////////////////////////////////////////////
// C3dShape construction
C3dObjectDisk::C3dObjectDisk()
{
	// Set the attributes to default values..
 	m_iType = SHAPE_OBJECT;
  	m_szName.Format("Disk %u", nDiskObjects++);
	m_fInnerRadius	= 0.0f;
	m_fOuterRadius	= 1.0f;
	m_fSweepAngle	= 360.0f;	// full circle  
	m_iSegments		= 10;
	m_iRings		= 1;
	// Create our C3dPointArray object
	m_pPointArray = new C3dPointArray;
	ASSERT(m_pPointArray);
	
	// Create an array of points for our vertices
	m_pPointArray->Create(m_iSegments+2);
	// Initialize our cubes vertices (points)
	InitVertices();
}
/////////////////////////////////////////////////////////////////////////////
// C3DWorld Destructor
C3dObjectDisk::~C3dObjectDisk()
{
	// Delete our point array
	if(m_pPointArray)
		delete m_pPointArray;
}
/////////////////////////////////////////////////////////////////////////////
// C3dObjectDisk Methods or virtual function implimentation
void C3dObjectDisk::AddAttributePage(C3dWorld* pWorld, LPVOID pSht)
{
	C3dObjectPropSheet* pSheet = (C3dObjectPropSheet*)pSht;
	ASSERT(pSheet);
	// Add the page to the property sheet
	pSheet->AddPage(&pSheet->m_DiskPage);
	// Save the address of this object in the page
	pSheet->m_DiskPage.m_pObject = this;
}
int C3dObjectDisk::LoadBitMapImage(CImageList* pList)
{
	CBitmap		bitmap;
	// If the image index has been stored in this object,
	// return the index.
	if(m_iBMImage > -1)
		return m_iBMImage;
	
	// If the image index for this object type has been
	// created, store the index for this object and
	// return the index.
	if(	iObjectDiskBMImage > -1) {
		m_iBMImage = iObjectDiskBMImage;
		return m_iBMImage;
	}
	// The image index for this object type has not been
	// loaded and the object image index has not been
	// stored.
	//
	// Load the bitmap for the non-selected light
	bitmap.LoadBitmap(IDB_OBJECT_DISK);
	m_iBMImage = pList->Add(&bitmap, (COLORREF)0xFFFFFF);
	bitmap.DeleteObject();
	// Load the bitmap for the non-selected light
	bitmap.LoadBitmap(IDB_OBJECT_DISK_SELECTED);
	pList->Add(&bitmap, (COLORREF)0xFFFFFF);
	bitmap.DeleteObject();
	iObjectDiskBMImage = m_iBMImage;
	return m_iBMImage;
}
void C3dObjectDisk::Serialize(CArchive& ar, int iVersion)
{
	CString szBuffer;
	if (ar.IsStoring())
	{
		// Save the Object Class header...
		szBuffer.Format("n%sC3dObjectDisk {n", szIndent);
		ar.WriteString(szBuffer);
		
		// Save the this objects' specific data...
		szBuffer.Format("%stInnerRadius   < %f >n", szIndent, m_fInnerRadius);
		ar.WriteString(szBuffer);
		szBuffer.Format("%stOuterRadius   < %f >n", szIndent, m_fOuterRadius);
		ar.WriteString(szBuffer);
		szBuffer.Format("%stSegments      < %d >n", szIndent, m_iSegments);
		ar.WriteString(szBuffer);
		szBuffer.Format("%stSweepAngle    < %f >n", szIndent, m_fSweepAngle);
		ar.WriteString(szBuffer);
		szBuffer.Format("%stSolid Color   < %d >n", szIndent, m_bSolidColor);
		ar.WriteString(szBuffer);
		szBuffer.Format("%stNum Points    < %d >n", szIndent, m_pPointArray->m_iNumPoints);
		ar.WriteString(szBuffer);
		m_pPointArray->Serialize(ar, iVersion, !m_bSolidColor);
		// Save the base class object data...
		C3dObject::Serialize(ar, iVersion);
		szBuffer.Format("%s}n", szIndent);	// end of object def
		ar.WriteString(szBuffer);
	}
	else
	{
		if(iVersion < 102)
			// Read the base class object data...
			C3dObject::Serialize(ar, iVersion);
		// Read the derived class data..
		ar.ReadString(szBuffer);
		szBuffer.TrimLeft();	// Remove leading white spaces
		sscanf(szBuffer, "InnerRadius   < %f >n", &m_fInnerRadius);
		ar.ReadString(szBuffer);
		szBuffer.TrimLeft();
		sscanf(szBuffer, "OuterRadius   < %f >n", &m_fOuterRadius);
		ar.ReadString(szBuffer);
		szBuffer.TrimLeft();
		sscanf(szBuffer, "Segments      < %d >n", &m_iSegments);
		// Resize our point array to accomodate all points
		int arraySize;
		if(m_fInnerRadius)
			arraySize = (m_iSegments*2)+2;
		else
			arraySize = m_iSegments+2;
		if(m_pPointArray->SetArraySize(arraySize))
			return;
		if(iVersion < 110)
		{
			// Version 1.10 and higher do not support rings on disk, so just read
			// the buffer
			ar.ReadString(szBuffer);
			// Initialize our point array vertices
			InitVertices();
		}
		else
		{
			ar.ReadString(szBuffer);
			szBuffer.TrimLeft();
			sscanf(szBuffer, "SweepAngle    < %f >n", &m_fSweepAngle);
			if(iVersion > 130)
			{
				// Version 1.4 added point color capability
				ar.ReadString(szBuffer);
				szBuffer.TrimLeft();
				sscanf(szBuffer, "Solid Color   < %d >n", &m_bSolidColor);
			}
			ar.ReadString(szBuffer);
			szBuffer.TrimLeft();
			sscanf(szBuffer, "Num Points    < %d >n", &m_pPointArray->m_iNumPoints);
			// Read the shape vertice, or point data
			m_pPointArray->Serialize(ar, iVersion, !m_bSolidColor);
		}
		if(iVersion < 102)
			// Read all child objects...
			LoadChildObjects(ar, iVersion);
		else
			// Read the base class object data...
			C3dObject::Serialize(ar, iVersion);
	}
}
void C3dObjectDisk::Build(C3dWorld* pWorld, C3dCamera* pCamera)
{
	VECTORF Normal;
	GLfloat	x0, y0, x1, y1;
	double	a0, a1;
	int i;
	// Compile and build the list
	glNewList(m_iDisplayLists, GL_COMPILE_AND_EXECUTE);
		if(!m_fInnerRadius)
		{
			C3dPoint* pInnerPoint;	// Pointer to the first inner point
			C3dPoint* pOuterPoint;	// Pointer to the first outer point
			pInnerPoint = &m_pPointArray->m_pPoints[0];	// first point in array
			pOuterPoint = &m_pPointArray->m_pPoints[1];	// second point in array
			// Initialize our disks vertice points
			for(i=0; i<m_iSegments; i++)
			{
				a0 = i * (m_fSweepAngle/m_iSegments);
				x0 = Cosf((GLfloat)a0);
				y0 = Sinf((GLfloat)a0);
				a1 = (i+1) * (m_fSweepAngle/m_iSegments);
				x1 = Cosf((GLfloat)a1);
				y1 = Sinf((GLfloat)a1);
				glBegin(GL_TRIANGLES);
					// Calculate the normal for the triangle
					CalNormalf(pInnerPoint->m_fOrigin,
							   pOuterPoint[i+1].m_fOrigin,
							   pOuterPoint[i].m_fOrigin,
							   Normal);
					glNormal3fv(Normal);
					glTexCoord2d(0.5, 0.5);
					if(!m_bSolidColor)
						glColor4fv(pInnerPoint->m_Color.m_fColor);
					glVertex3fv(pInnerPoint->m_fOrigin);
					glTexCoord2d((x0*0.5)+0.5, (y0*0.5)+0.5); 
					if(!m_bSolidColor)
						glColor4fv(pOuterPoint[i].m_Color.m_fColor);
					glVertex3fv(pOuterPoint[i].m_fOrigin);
					glTexCoord2d((x1*0.5)+0.5, (y1*0.5)+0.5); 
					if(!m_bSolidColor)
						glColor4fv(pOuterPoint[i+1].m_Color.m_fColor);
					glVertex3fv(pOuterPoint[i+1].m_fOrigin);
				glEnd();
			}
		}
		else
		{
			C3dPoint* pPoint = m_pPointArray->m_pPoints;	// first point in array
			// Initialize our disks vertice points
			for(i=0; i<(m_iSegments*2); i+=2)
			{
				a0 = (i/2) * (m_fSweepAngle/m_iSegments);
				x0 = Cosf((GLfloat)a0);
				y0 = Sinf((GLfloat)a0);
				a1 = ((i/2)+1) * (m_fSweepAngle/m_iSegments);
				x1 = Cosf((GLfloat)a1);
				y1 = Sinf((GLfloat)a1);
				glBegin(GL_TRIANGLE_STRIP);
					// Calculate the normal for the triangle
					CalNormalf(pPoint[i+1].m_fOrigin,
							   pPoint[i].m_fOrigin,
							   pPoint[i+3].m_fOrigin,
							   Normal);
					glNormal3fv(Normal);
					glTexCoord2d((x0*0.5)+0.5, (y0*0.5)+0.5); 
					if(!m_bSolidColor)
						glColor4fv(pPoint[i+1].m_Color.m_fColor);
					glVertex3fv(pPoint[i+1].m_fOrigin);
					glTexCoord2d((x1*0.5)+0.5, (y1*0.5)+0.5); 
					if(!m_bSolidColor)
						glColor4fv(pPoint[i+3].m_Color.m_fColor);
					glVertex3fv(pPoint[i+3].m_fOrigin);
					glTexCoord2d(((x0*(m_fInnerRadius/m_fOuterRadius))/2)+0.5,
								 ((y0*(m_fInnerRadius/m_fOuterRadius))/2)+0.5); 
					if(!m_bSolidColor)
						glColor4fv(pPoint[i].m_Color.m_fColor);
					glVertex3fv(pPoint[i].m_fOrigin);
					// Calculate the normal for the triangle
					CalNormalf(pPoint[i].m_fOrigin,
							   pPoint[i+2].m_fOrigin,
							   pPoint[i+3].m_fOrigin,
							   Normal);
					glNormal3fv(Normal);
					glTexCoord2d(((x1*(m_fInnerRadius/m_fOuterRadius))/2)+0.5,
								 ((y1*(m_fInnerRadius/m_fOuterRadius))/2)+0.5); 
					if(!m_bSolidColor)
						glColor4fv(pPoint[i+2].m_Color.m_fColor);
					glVertex3fv(pPoint[i+2].m_fOrigin);
				glEnd();
			}
		}
	glEndList();
}
/////////////////////////////////////////////////////////////////////////////
// C3dObjectDisk Methods or Implementation
void C3dObjectDisk::InitVertices()
{
/*	  Flat disk with Inner				Flat disk with Inner
	  radius = 0.0						radius = x.0
	
                                          p5 -------  p3
                                           /            
         p3 ------ p2                    /                      
          /                           /   p4 ----- p2   
        /                            |     /            |
    p4 |       *p0    | p1&pN      p7 |  p6|         |p0  | p1
       |              |               |            / pN  | pN+1
                    /                    p8 ----- p10  /
                  /                                  /
         p5 ------ p6                               /
                                          p9 ------- p11
*/
	C3dPoint* pPoint;
	int iNumPoints;
	// Determine the number of points in the disk
	if(m_fInnerRadius)
		iNumPoints = (m_iSegments+1)*2;
	else
		iNumPoints = m_iSegments+2;
	if(m_pPointArray->SetArraySize(iNumPoints))
		return;	// function failed
	pPoint= m_pPointArray->m_pPoints;	// address of the first point
	// Initialize our disks vertice points
	int i;
	for(i=0; i<=m_iSegments; i++)
	{
		double a0  = i * (m_fSweepAngle/m_iSegments);
		GLfloat x0 = Cosf((GLfloat)a0);
		GLfloat y0 = Sinf((GLfloat)a0);
		if(m_fInnerRadius || i==0)
		{
			pPoint->m_fOrigin[X] = m_fInnerRadius*x0;
			pPoint->m_fOrigin[Y] = m_fInnerRadius*y0;
			pPoint->m_fOrigin[Z] = 0.0f;
			pPoint++;
		}
		pPoint->m_fOrigin[X] = m_fOuterRadius*x0;
		pPoint->m_fOrigin[Y] = m_fOuterRadius*y0;
		pPoint->m_fOrigin[Z] = 0.0f;
		pPoint++;
	}
}

						