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// Camera.cpp: implementation of the CCamera class. 
// 
////////////////////////////////////////////////////////////////////// 
 
#include "stdafx.h" 
#include "Camera.h" 
////////////////////////////////////////////////////////////////////// 
// Construction/Destruction 
////////////////////////////////////////////////////////////////////// 
 
CCamera::CCamera() 
{ 
    m_CamPos=VERTEX(10,0,10); 
    m_CamDirection=NORMAL(1,0,0); 
	m_CamRotX=0; 
	m_CamRotY=-90; 
	m_CamRotZ=0; 
	m_VisualAngle=60; 
} 
 
CCamera::~CCamera() 
{ 
} 
void CCamera::UpdateCamera(VERTEX position,float rotX,float rotY,float rotZ) 
{ 
    m_CamPos=position; 
	m_CamRotX=rotX; 
	m_CamRotY=rotY; 
	m_CamRotZ=rotZ; 
 
	m_CamDirection=NORMAL(-cosf(rotX*0.0174533f)*sinf(rotY*0.0174533f), 
		                  sinf(rotX*0.0174533f), 
						  -cosf(rotX*0.0174533f)*cosf(rotY*0.0174533f)); 
 
	m_CamDirection=math.Normalization(m_CamDirection); 
} 
 
void CCamera::UpdateCamera(VERTEX newFoucs) 
{ 
	m_CamDirection=NORMAL(newFoucs.xpos-m_CamPos.xpos,newFoucs.ypos-m_CamPos.ypos,newFoucs.zpos-m_CamPos.zpos); 
	m_CamDirection=math.Normalization(m_CamDirection); 
	m_CamRotX=asinf(m_CamDirection.ny)*57.29578f; 
	m_CamRotY=acosf(-m_CamDirection.nz/(sqrt(m_CamDirection.nz*m_CamDirection.nz+m_CamDirection.nx*m_CamDirection.nx)))*57.29578f; 
//	m_CamRotY=float(57.29583f*acos(-m_CamDirection.nz/(sqrt(m_CamDirection.nz*m_CamDirection.nz+m_CamDirection.nx*m_CamDirection.nx)))); 
	if(m_CamDirection.nx>0)m_CamRotY=360-m_CamRotY; 
} 
void CCamera::SetVisualAngle(float visualAngle) 
{ 
	m_VisualAngle=visualAngle; 
} 
float CCamera::GetAngleCosine(VERTEX point) 
{ 
    float cosValue=math.GetTwoVectorAngleCosine(NORMAL(point.xpos-m_CamPos.xpos, 
		                                 point.ypos -m_CamPos.ypos, 
										 point.zpos-m_CamPos.zpos ) ,  
										 m_CamDirection); 
	if(cosValue>cosf(m_VisualAngle*0.0174533f)) 
	{ 
		return cosValue; 
	} 
    return 0; 
} 
bool CCamera::IsOnFoucs(VERTEX point) 
{ 
 
    return false; 
}