Animation Flashcards
(21 cards)
Animation creates the illusion of movement by…
Showing a sequence of gradually changing images in quick succession
The changing of images is measured as…
Frames per second (fps)
Cel-based animation creates movement by…
Using multiple, transparent layers, with drawn features that differ slightly from frame to frame
Stop motion animation creates movement by…
Moving physical objects in small increments between photographed frames
Computer animation creates movement by…
Controlling the animation of an object through animation variables, often using a simplified skeleton with animated joints, but can be done using base level vertices
Physics-based animation creates movement by…
Assigning physical properties to objects and simulating physical laws of physics
Particle systems/flocking models complex motion by…
Using many simple particles that each have physics and behavioural rules
Key frames are used to create animation by…
Specifying the state of a scene at specific moments, using interpolation to gradually change between them
Morphing creates movement by…
Storing deformed versions of meshes and interpolating between them
Rigging is the process of…
Creating a hierarchical skeletal structure in order to control mesh animation
Each bone in an animation rig maintains a list of…
Transformations (i.e. translation, rotation, scaling)
Forward kinematics calculates joint poses by…
Determining the position of end points based on joint angles and link lengths, combining transformations from all parent bones
Inverse kinematics calculates joint poses by…
Specifying where a limb should end up, allowing the system instead to calculate the necessary joint angles to reach that point
Skinning defines how a model’s surface…
Deforms with skeletal movement, typically via vertex weighting
Motion capture is the…
Recording of human actors to animate computer models
Motion capture systems use…
Reflective markers placed at joint locations, alongside synchronised cameras using triangulation to find the 3D points of those joints
Markerless motion capture is a type of motion capture that…
Uses no physical markers, instead using some kind of computer vision that reconstructs shapes from silhouettes
4D body scanning is a type of motion capture that…
Captures both shape and motion simultaneously, allowing for a direct import of human body shapes in various poses
Motion graphs are used to…
Represent possible transitions between recorded motions as a graph
Motion graphs are generated by…
Identifying the most similar frames between different motion recordings and creating transitions between them
Each recording typically forms simple motion graph with start and end nodes, but transitions add new […] that connect different […] at points of similarity.
New edges that connect different motions at points of similarity.
