www.pudn.com > Particles1.zip > camera.cpp

#include "camera.h" 
#include "math.h" 
#include  
#include "windows.h" 
 
 
/***************************************************************************************/ 
 
CCamera::CCamera() 
{ 
	//Init with standard OGL values: 
	Position = F3dVector (	0.0,  
							0.0, 
							0.0); 
	ViewDir = F3dVector(	0.0, 
							0.0, 
							-1.0); 
	ViewDirChanged = false; 
	//Only to be sure: 
	RotatedX = RotatedY = RotatedZ = 0.0; 
} 
 
void CCamera::GetViewDir( void ) 
{ 
	SF3dVector Step1, Step2; 
	//Rotate around Y-axis: 
	Step1.x = cos( (RotatedY + 90.0) * PIdiv180); 
	Step1.z = -sin( (RotatedY + 90.0) * PIdiv180); 
	//Rotate around X-axis: 
	double cosX = cos (RotatedX * PIdiv180); 
	Step2.x = Step1.x * cosX; 
	Step2.z = Step1.z * cosX; 
	Step2.y = sin(RotatedX * PIdiv180); 
	//Rotation around Z-axis not yet implemented, so: 
	ViewDir = Step2; 
} 
void CCamera::Move (SF3dVector Direction) 
{ 
	AddF3dVectorToVector(&Position, &Direction ); 
} 
 
void CCamera::RotateY (GLfloat Angle) 
{ 
	RotatedY += Angle; 
	ViewDirChanged = true; 
} 
 
void CCamera::RotateX (GLfloat Angle) 
{ 
	RotatedX += Angle; 
	ViewDirChanged = true; 
} 
 
void CCamera::Render( void ) 
{ 
	glRotatef(-RotatedX , 1.0, 0.0, 0.0); 
	glRotatef(-RotatedY , 0.0, 1.0, 0.0); 
	glRotatef(-RotatedZ , 0.0, 0.0, 1.0); 
	glTranslatef( -Position.x, -Position.y, -Position.z ); 
} 
 
void CCamera::MoveForwards( GLfloat Distance ) 
{ 
	if (ViewDirChanged) GetViewDir(); 
	SF3dVector MoveVector; 
	MoveVector.x = ViewDir.x * -Distance; 
	MoveVector.y = ViewDir.y * -Distance; 
	MoveVector.z = ViewDir.z * -Distance; 
	AddF3dVectorToVector(&Position, &MoveVector ); 
} 
 
void CCamera::StrafeRight ( GLfloat Distance ) 
{ 
	if (ViewDirChanged) GetViewDir(); 
	SF3dVector MoveVector; 
	MoveVector.z = -ViewDir.x * -Distance; 
	MoveVector.y = 0.0; 
	MoveVector.x = ViewDir.z * -Distance; 
	AddF3dVectorToVector(&Position, &MoveVector ); 
} 
 
SF3dVector CCamera::GetPosition() 
{ 
	return Position; 
}