www.pudn.com > etree_src.zip > Tree.cpp

//**************************************************************************** 
//  Tree.cpp: implementation of the CTree class. 
// 
//  Copyright (c) Boris J. Wang (e_boris2002@hotmail.com) 2002 - 2003 
//  From Institute of Computing Technology, Chinese Academy of Sciences 
//                                                Beijing 100871, China 
// 
//  THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF  
//  ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO  
//  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A  
//  PARTICULAR PURPOSE. 
//**************************************************************************** 
 
#include "stdafx.h" 
#include "opengl.h" 
#include "Tree.h" 
 
#ifdef _DEBUG 
#undef THIS_FILE 
static char THIS_FILE[]=__FILE__; 
#define new DEBUG_NEW 
#endif 
 
////////////////////////////////////////////////////////////////////// 
// Construction/Destruction 
////////////////////////////////////////////////////////////////////// 
float CTree::TreeDepth = 19.29; 
GLfloat CTree::TreeShadowLength = 0.98; 
GLfloat CTree::BranchShadowDensity = 0.30; 
GLfloat CTree::LeafShadowDensity = 0.25; 
 
int CTree::TotalVertex,CTree::TotalQuad,CTree::TotalNode,CTree::TotalMemory; 
 
 
CTree::CTree() 
{ 
} 
 
CTree::~CTree() 
{ 
 
} 
 
void CTree::Rebuild(int Depth) 
{ 
	CLeaf::LastSizeNoiseSeqIndex = 0; 
	Root.LeafScale = CSegment::SegLeafSize; 
 
	Root.Rebuild(Depth); 
	if(Root.Segments) 
	{ 
		Root.Segments->Length*=2; 
	} 
} 
 
bool CTree::Initialize() 
{ 
	Root.Base = &Base; 
	Rebuild(TreeDepth); 
 
	CSegment::BarkMTR.SetAmbient(0.15f,0.15f,0.15f); 
	CSegment::BarkMTR.SetDiffuse(0.5f,0.5f,0.5f); 
 
//	CLeaf::Material.SetAmbient(0.7,0.652,0.0,1.0); 
	CLeaf::Material.SetDiffuse(0.1,0.0,0.0,1.0); 
 
	return true; 
} 
 
void CTree::Render() 
{ 
	Root.Render(); 
} 
 
void CTree::DrawShadow(GLfloat Angle) 
{ 
	glDisable(GL_LIGHTING); 
	glDisable(GL_DEPTH_TEST); 
	CglTexture::Enable(false); 
 
	glPushMatrix(); 
		glEnable(GL_BLEND); 
		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); 
 
		glRotatef(90,0,0,1); 
		glScalef(0.0,TreeShadowLength,1.0); 
		glRotatef(Angle, 0.0f, 1.0f, 0.0f); 
 
		CLeaf::IsRenderShadow = true; 
		Render(); 
		CLeaf::IsRenderShadow = false; 
 
		glDisable(GL_BLEND); 
	glPopMatrix(); 
 
	glEnable(GL_DEPTH_TEST); 
	glEnable(GL_LIGHTING); 
	CglTexture::Enable(); 
}