ufcekt-20-33d modelling and animation 3d modelling & animation cameras

UFCEKT-20-33D Modelling and Animation

3D Modelling & Animation

Cameras


Agenda

Maya Camera Principles and Photographic Concepts Camera Types Camera Attributes Movement of Cameras Image Planes Clipping Planes


Camera Principles

Scene Image

Pinhole Camera

Resulting image is mirrored and inverted

Small aperture results in very long exposures

Light Rays


Camera Principles

Scene Image

Pinhole Camera

Increasing the pinhole size provides more light to shorten exposure times but introduces distortion of light rays resulting in poor image qualityLight Rays


Cameras Principles

Scene Image

Simple Lens

Simple lens refracts light to reduce distortions

Light Rays


Cameras Principles

Scene Image

Compound Lens

Compound lens designed to control variety of lens aberrations which effect both image sharpness and colourLight Rays


Maya Cameras - 35mm


Physical Lens Features

Base format - The size of the negative / film gate e.g. 35mm - Medium Format - Large Format

Focal Length Aperture Depth of Field Lens aberrations (flare)


Angle of View for 35mm

Shorter focal length lenses have angle of view which gives steeper perspective

Longer focal length lenses have narrow angle of view which gives flatter perspective

50mm provides natural perspective for the 35mm format


Aperture & Depth of Field


Maya Cameras

Based on 35mm photography Always in focus No given depth of field No aberrations e.g lens flare Need to create above effects when required


Maya Types

Camera - standalone camera Camera and Aim - camera with aim to direct at point of interest Camera Aim and Up - additional control to orientate camera around lens axis


Camera Types Representation in the Maya Environment

Camera and Aim

Camera, Aim and UpCamera


Camera Movement

‘Subject’ is the point of interest for the selected camera Zoom - change the magnification of the subject by altering the focal

length of the lens Dolly - change the camera’s perpendicular position relative to the

subject Pan - follow the subject as it moves across the cameras field of view Track follow the subject from the side usually maintaining a speed

equal to the subject’s speed Follow follow the subject through the scene from behind

A typical scenario would apply variations and combinations of the above


Using a ‘dummy object’ on a path to control a camera

dummy object

Dummy object follows path - camera child of dummy object and follows path - more subtle control of camera movement - less rigid connection


The Hypergraph Window - a schematic representation of all objects in the scene


Camera Attribute Editor


Image Planes

Cameras can have an image plane placed as a backdrop to provide a background to the camera's field of view or as an aid to modelling geometry against an orthographic image.

UFCEKT-20-33D Modelling and AnimationB.Sc. (Hons) Multimedia Computing

Media Technologies


Clipping Planes

Cameras have adjustable far and near clipping planes Any object beyond the far clipping pane is not visible Any object in front of the near clipping plane is not visible Clipping planes are often referred to as ‘yon’ and ‘hither’ where yon is far and hither is near


Clipping Planes


Maya Cameras

Based on 35mm photography Lenses for wide angle , normal, telephoto

Use terminology from the movie industry Zoom (change focal length of lens) Dolly - (move toward or away from subject Track - (side follow subject)

No aberrations e.g lens flare Always in focus Animation as individual object and via path-based animation Use a dummy object as an intermediate connection between camera and path - improves animation of camera

ufcekt-20-33d modelling and animation 3d modelling & animation cameras

Documents

camera slide

animation slide

d modelling animation

aim camera

camera aim

format slide

animation maya cameras

animation physical lens