CSCI441::Camera Class Reference

Abstract Class to represent a synthetic camera. The following methods must be overridden:
More...

#include <Camera.hpp>

Inheritance diagram for CSCI441::Camera:

Public Member Functions
virtual	~Camera ()=default
	properly destroy concrete children
virtual void	recomputeOrientation ()=0
	Uses theta, phi, & radius to update the camera's view matrix parameters. The camera orientation is controlled via spherical coordinates and this method would orient and/or position the camera in cartesian coordinates.
virtual void	moveForward (GLfloat movementFactor)=0
	steps forward along the camera's view
virtual void	moveBackward (GLfloat movementFactor)=0
	steps backward along the camera's view
virtual void	rotate (GLfloat dTheta, GLfloat dPhi)
	rotates the camera's POV by adding to theta & phi then ensuring phi stays within the (0, pi) range and finally calls through to recomputeOrientation() to update the view parameters after the rotation
virtual void	computeViewMatrix () final
	creates the View Matrix based on the position, lookAt point, and up vector
virtual glm::mat4	getProjectionMatrix () const final
	returns the current projection matrix for the associated camera
virtual glm::mat4	getViewMatrix () const final
	returns the current view matrix for the associated camera
virtual glm::vec3	getPosition () const final
	returns the current camera position in world space
virtual glm::vec3	getLookAtPoint () const final
	returns the current lookAt point in world space
virtual glm::vec3	getUpVector () const final
	returns the current up vector in world space
virtual GLfloat	getTheta () const final
	returns the current theta value in radians
virtual GLfloat	getPhi () const final
	returns the current phi value in radians
GLfloat	getRadius () const
	returns the current radius in world space
virtual void	setPosition (const glm::vec3 pos) final
	sets the camera's position in world space
virtual void	setLookAtPoint (const glm::vec3 lookAt) final
	sets the camera's lookAt point in world space
virtual void	setUpVector (const glm::vec3 up) final
	sets the camera's up vector in world space
virtual void	setTheta (const GLfloat t) final
	sets the camera's theta angle in radians
virtual void	setPhi (const GLfloat p) final
	sets the camera's phi angle in radians
virtual void	setRadius (const GLfloat r) final
	sets the camera's radius in world space

Protected Member Functions
	Camera ()
	create a default camera at the origin, looking down the negative Z axis oriented with the world coordinate system

Protected Attributes
glm::mat4	mProjectionMatrix
	stores the Projection Matrix
glm::mat4	mViewMatrix
	stores the View Matrix corresponding to the inverse of the Camera's Matrix
glm::vec3	mCameraPosition
	the cartesian position in world space of the camera
glm::vec3	mCameraDirection
	the cartesian direction the camera is facing in world space
glm::vec3	mCameraLookAtPoint
	the world space point in front of the camera
glm::vec3	mCameraUpVector
	the up vector of the camera specified in world space
GLfloat	mCameraTheta
	spherical angle for yaw direction in radians
GLfloat	mCameraPhi
	spherical angle for pitch direction in radians
GLfloat	mCameraRadius
	spherical magnitude for direction in world space

Detailed Description

Abstract Class to represent a synthetic camera. The following methods must be overridden:

• recomputeOrientation()
  
• moveForward()
  
• moveBackward()

Member Function Documentation

getLookAtPoint()

virtual glm::vec3 CSCI441::Camera::getLookAtPoint ( ) const

inlinefinalvirtual

returns the current lookAt point in world space

Returns

homogeneous world space point

getPhi()

virtual GLfloat CSCI441::Camera::getPhi ( ) const

inlinefinalvirtual

returns the current phi value in radians

Returns

spherical phi coordinate

getPosition()

virtual glm::vec3 CSCI441::Camera::getPosition ( ) const

inlinefinalvirtual

returns the current camera position in world space

Returns

homogeneous world space point

getProjectionMatrix()

virtual glm::mat4 CSCI441::Camera::getProjectionMatrix ( ) const

inlinefinalvirtual

returns the current projection matrix for the associated camera

Returns

homogeneous projection matrix

getRadius()

GLfloat CSCI441::Camera::getRadius ( ) const

inline

returns the current radius in world space

Returns

spherical radius coordinate

getTheta()

virtual GLfloat CSCI441::Camera::getTheta ( ) const

inlinefinalvirtual

returns the current theta value in radians

Returns

spherical theta coordinate

getUpVector()

virtual glm::vec3 CSCI441::Camera::getUpVector ( ) const

inlinefinalvirtual

returns the current up vector in world space

Returns

homogeneous world space vector

getViewMatrix()

virtual glm::mat4 CSCI441::Camera::getViewMatrix ( ) const

inlinefinalvirtual

returns the current view matrix for the associated camera

Returns

homogeneous view matrix

moveBackward()

virtual void CSCI441::Camera::moveBackward ( GLfloat  movementFactor )

pure virtual

steps backward along the camera's view

Parameters

movementFactor

scaling factor for distance to move

Implemented in CSCI441::FixedCam, CSCI441::HUDCamera, CSCI441::ArcballCam, CSCI441::FreeCam, and CSCI441::MD5Camera.

moveForward()

virtual void CSCI441::Camera::moveForward ( GLfloat  movementFactor )

pure virtual

steps forward along the camera's view

Parameters

movementFactor

scaling factor for distance to move

Implemented in CSCI441::FixedCam, CSCI441::HUDCamera, CSCI441::ArcballCam, CSCI441::FreeCam, and CSCI441::MD5Camera.

recomputeOrientation()

virtual void CSCI441::Camera::recomputeOrientation ( )

pure virtual

Uses theta, phi, & radius to update the camera's view matrix parameters. The camera orientation is controlled via spherical coordinates and this method would orient and/or position the camera in cartesian coordinates.

Implemented in CSCI441::ArcballCam, CSCI441::FixedCam, CSCI441::FreeCam, CSCI441::HUDCamera, and CSCI441::MD5Camera.

rotate()

void CSCI441::Camera::rotate ( GLfloat  dTheta, GLfloat  dPhi  )

inlinevirtual

rotates the camera's POV by adding to theta & phi then ensuring phi stays within the (0, pi) range and finally calls through to recomputeOrientation() to update the view parameters after the rotation

Parameters

dTheta	change in rotation of theta represented in radians
dPhi	change in rotation of phi represented in radians

Note

There is a default implementation to update theta & phi, but the method is overridable in the event a camera should be fixed and rotation can then be disabled.

setLookAtPoint()

virtual void CSCI441::Camera::setLookAtPoint ( const glm::vec3  lookAt )

inlinefinalvirtual

sets the camera's lookAt point in world space

Parameters

lookAt

the new camera world space lookAt point

setPhi()

virtual void CSCI441::Camera::setPhi ( const GLfloat  p )

inlinefinalvirtual

sets the camera's phi angle in radians

Parameters

p	the new camera phi angle in radians

setPosition()

virtual void CSCI441::Camera::setPosition ( const glm::vec3  pos )

inlinefinalvirtual

sets the camera's position in world space

Parameters

pos	the new camera world space position

setRadius()

virtual void CSCI441::Camera::setRadius ( const GLfloat  r )

inlinefinalvirtual

sets the camera's radius in world space

Parameters

r	the new camera radius in world space

setTheta()

virtual void CSCI441::Camera::setTheta ( const GLfloat  t )

inlinefinalvirtual

sets the camera's theta angle in radians

Parameters

t	the new camera theta angle in radians

setUpVector()

virtual void CSCI441::Camera::setUpVector ( const glm::vec3  up )

inlinefinalvirtual

sets the camera's up vector in world space

Parameters

up	the new camera world space up vector

---

The documentation for this class was generated from the following file:

• Camera.hpp