www.pudn.com > packmk2.rar > camera.cpp

#include "camera.h" 
 
camera::camera(){ 
	position = D3DXVECTOR3(0,0,0); 
	fov = 45; 
	aspect = 1.0; 
	znear = 0.1; 
	zfar = 10; 
	rotx = 0; 
	roty = 0; 
	rotz = 0; 
	this->update(); 
} 
 
camera::camera(D3DXVECTOR3 pos, float rotx, float roty, float rotz, float fov, float aspect, float nearz, float farz){ 
	this->position = pos; 
	this->fov = fov; 
	this->aspect = aspect; 
	this->znear = nearz; 
	this->zfar = farz; 
	this->rotx = rotx; 
	this->roty = roty; 
	this->rotz = rotz; 
	this->update(); 
} 
 
camera::camera(const camera *src){ 
	this->position	= src->position; 
	this->fov		= src->fov; 
	this->aspect	= src->aspect; 
	this->znear		= src->znear; 
	this->zfar		= src->zfar; 
	this->rotx		= src->rotx; 
	this->roty		= src->roty; 
	this->rotz		= src->rotz; 
	this->update(); 
} 
 
camera::~camera(){ 
	// nothing funny here 
} 
 
void camera::update(){ 
	D3DXMATRIXA16 rotatex,rotatey,rotatez,translation; 
	// perspective matrix 
	D3DXMatrixPerspectiveFovLH(&proj, fov, aspect, znear, zfar); 
	// view matrix 
	D3DXMatrixRotationX(&rotatex,rotx); 
	D3DXMatrixRotationY(&rotatey,roty); 
	D3DXMatrixRotationZ(&rotatez,rotz); 
	D3DXMatrixTranslation(&translation,-position.x,-position.y,-position.z); 
	view = translation * rotatey*rotatex*rotatez; 
	// and finally the combined viewproj 
	viewproj = view*proj; 
	// and all the inverses 
	D3DXMatrixInverse(&invproj,NULL,&proj); 
	D3DXMatrixInverse(&invview,NULL,&view); 
	D3DXMatrixInverse(&invviewproj,NULL,&viewproj); 
	// and the direction vectors 
	D3DXVec3TransformNormal(&forward,&D3DXVECTOR3(0,0,1),&invview); 
	D3DXVec3TransformNormal(&up,&D3DXVECTOR3(0,1,0),&invview); 
	D3DXVec3TransformNormal(&right,&D3DXVECTOR3(1,0,0),&invview); 
} 
 
// set all parameters assuming position, forward & all the perspective shit are correct 
void camera::update_lookat(){ 
	// perspective matrix 
	D3DXMatrixPerspectiveFovLH(&proj, fov, aspect, znear, zfar); 
	// view matrix 
	D3DXMatrixLookAtLH( &view, &position,&(position+forward), &D3DXVECTOR3(0,1,0)); 
 
	// and finally the combined viewproj 
	viewproj = view*proj; 
	// and all the inverses 
	D3DXMatrixInverse(&invproj,NULL,&proj); 
	D3DXMatrixInverse(&invview,NULL,&view); 
	D3DXMatrixInverse(&invviewproj,NULL,&viewproj); 
	D3DXVec3TransformNormal(&right,&D3DXVECTOR3(1,0,0),&invview); 
}