Camera

Abstract base class for camera types.

This class is not intended to be used directly. Use PerspectiveCamera or OrthographicCamera unless you are defining your own camera, in which case it should inherit from this class.

INFO

Derives from Node and inherits all public properties and methods.

Properties

projection_matrix Matrix4

Projection matrix that maps camera-space coordinates to clip space.

Matrix4 projection_matrix {Matrix4::Identity()};

view_matrix Matrix4

View matrix that maps world space to camera space.

Matrix4 view_matrix {Matrix4::Identity()};

Functions

Forward() Vector3

Camera forward axis in world space.

Vector3 Camera::Forward();

GetFrustum() Frustum

Computes a Frustum from the combined projection and view matrices.

Used for applying frustum culling to renderable nodes.

Frustum Camera::GetFrustum();

GetNodeType() Node::Type virtual

Identifies this node as Node::Type::Camera.

Type vglx::Camera::GetNodeType() const override;

LookAt() void virtual

Overrides Node::LookAt to orient the camera toward a world-space target.

Accounts for the camera’s -Z viewing direction so the camera faces the given point.

void Camera::LookAt(const Vector3& target) override;

Parameter	Description
target	World-space position for the camera to look at.

Resize() void pure virtual

Updates projection_matrix to reflect the current viewport size.

Must be implemented by derived cameras to apply the appropriate projection logic.

virtual void Camera::Resize(int width, int height)=0;

Parameter	Description
width	Viewport width in pixels.
height	Viewport height in pixels.

Right() Vector3

Camera right axis in world space.

Vector3 Camera::Right();

Up() Vector3

Camera up axis in world space.

Vector3 Camera::Up();

UpdateViewMatrix() void

Sets view_matrix to the inverse of the camera's world transform.

Called internally by the renderer before rendering a frame; manual calls are rarely necessary.

void Camera::UpdateViewMatrix();