/
Camera.cpp
263 lines (164 loc) · 5.04 KB
/
Camera.cpp
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// EGC
// Laborator 7
//-------------------------------------------------
#include "camera.h"
#include "math.h"
#include "Vector3D.h"
#define PI 3.14159265
// constructor
Camera::Camera()
{
//initializare cu valorile standard OpenGL
/*
Position = Vector3D (0.0, 0.0, 12.0);
ForwardVector = Vector3D( 0.0, 0.0, -1.0);
RightVector = Vector3D (1.0, 0.0, 0.0);
UpVector = Vector3D (0.0, 1.0, 0.0);
*/
Position = Vector3D (0.0, 50, 0.0);
ForwardVector = Vector3D( 0.0, -1.0, 0.0);
RightVector = Vector3D (1.0, 0.0, 0.0);
UpVector = Vector3D (0.0, 0.0, -1.0);
// urmareste masina din spate
cameraType = 0;
}
void Camera::UpdateCamera(Vector3D posMasina, Vector3D rotMasina){
Vector3D pos;
Vector3D fwVector;
Vector3D rVector;
Vector3D uVector;
float distFataMasina = -10;
switch(cameraType) {
case 0 :{
//camera in spatele masinii
distFataMasina = -10;
pos = posMasina - Vector3D (distFataMasina * cos(rotMasina.y * PI / 180),posMasina.y,distFataMasina* -sin(rotMasina.y * PI/180));
Position = pos;
ForwardVector = Vector3D(-cos(rotMasina.y * PI / 180),0,sin(rotMasina.y * PI/180));
RightVector = Vector3D( -cos((rotMasina.y* PI -90)/180),0,sin((rotMasina.y*PI-90)/180));
UpVector=RightVector.CrossProduct(ForwardVector);
}break;
case 1 :{
//camera pe capota masinii
distFataMasina = -0.42;
pos = posMasina - Vector3D (distFataMasina * cos(rotMasina.y * PI / 180),posMasina.y+1.5,distFataMasina* -sin(rotMasina.y * PI/180));
Position = pos;
ForwardVector = Vector3D(-cos(rotMasina.y * PI / 180),0,sin(rotMasina.y * PI/180));
RightVector = Vector3D( -cos((rotMasina.y* PI -90)/180),0,sin((rotMasina.y*PI-90)/180));
UpVector=RightVector.CrossProduct(ForwardVector);
}break;
case 2:{
//camera satelit
distFataMasina = 0;
pos = posMasina - Vector3D (distFataMasina * cos(rotMasina.y * PI / 180),-20,distFataMasina* -sin(rotMasina.y * PI/180));
Position = pos;
ForwardVector = Vector3D(0,-1,0);
RightVector = Vector3D(-1,0,0);
UpVector= Vector3D(0,0,1);
}break;
case 3 : {
// free cam
}break;
case 4 : {
//developer cam, dezactivata , sare peste 4
Position = Vector3D (0.0, 50, 0.0);
ForwardVector = Vector3D( 0.0, -1.0, 0.0);
RightVector = Vector3D (1.0, 0.0, 0.0);
UpVector = Vector3D (0.0, 0.0, -1.0);
}
}
}
void Camera::RotateX (GLfloat Angle)
{
Vector3D fwd;
Vector3D up;
fwd = ForwardVector * cos(Angle) + UpVector* sin(Angle);
up = -ForwardVector * sin(Angle) + UpVector* cos(Angle);
up = fwd.CrossProduct(RightVector);
ForwardVector = fwd;
UpVector = -up;
}
void Camera::RotateY (GLfloat Angle)
{
Vector3D fwd;
Vector3D right;
fwd = ForwardVector * cos(Angle) + RightVector* sin(Angle);
right = -ForwardVector * sin(Angle) + RightVector* cos(Angle);
right = UpVector.CrossProduct(fwd);
ForwardVector = fwd;
RightVector = -right;
}
void Camera::RotateZ (GLfloat Angle)
{
Vector3D up;
Vector3D right;
up = UpVector * cos(Angle) + RightVector* sin(Angle);
right = -UpVector * sin(Angle) + RightVector* cos(Angle);
ForwardVector = -right.CrossProduct(up);
UpVector = up;
RightVector = right;
}
// rotire fata de centru, la o distanta generica 5
void Camera::RotateXCenter (GLfloat Angle)
{
float distance = 10;
MoveForward(distance);
RotateX(Angle);
MoveBackward(distance);
}
// rotire fata de centru, la o distanta generica 5
void Camera::RotateYCenter (GLfloat Angle)
{
float distance = 10;
MoveForward(distance);
RotateY(Angle);
MoveBackward(distance);
}
// rotire fata de centru, la o distanta generica 5
void Camera::RotateZCenter (GLfloat Angle)
{
float distance = 10;
MoveForward(distance);
RotateZ(Angle);
MoveBackward(distance);
}
// plasare observator in scena
void Camera::Render( void )
{
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
// punctul catre care se uita camera
Vector3D ViewPoint = Position + ForwardVector;
// stim vectorul UpVector, folosim LookAt
gluLookAt( Position.x,Position.y,Position.z,
ViewPoint.x,ViewPoint.y,ViewPoint.z,
UpVector.x,UpVector.y,UpVector.z);
}
// miscari simple, pe toate axele
void Camera::MoveForward( GLfloat Distance )
{
Position = Position +ForwardVector * Distance;
}
void Camera::MoveBackward( GLfloat Distance )
{
Position = Position -ForwardVector * Distance;
}
void Camera::MoveRight ( GLfloat Distance )
{
Position = Position +RightVector * -Distance;
}
void Camera::MoveLeft ( GLfloat Distance )
{
Vector3D addition(Distance,0,0);
Position = Position -RightVector * -Distance;
}
void Camera::MoveUpward( GLfloat Distance )
{
Vector3D addition(0,Distance,0);
Position = Position + addition;
}
void Camera::MoveDownward( GLfloat Distance )
{
Vector3D addition(0,-Distance,0);
Position = Position + addition;
}