1 6.Interpolation v Animation is implemented using time- based interpolation (or morphing) –time is specified using the class –time is specified using the Alpha class

2 Animation v Animation? –Modification of visual objects in time –Time stimulus -> Interpolation,Morph –The other stimulus -> Billboard, LOD v Time –Alpha object v Action –Interpolator object,Morph object –Billboard, LOD object

3 Alpha v Alpha is a value between 0 and 1. v Alpha value changes over time.

4 Alpha v Repeat count v Phase duration

5 Interpolator Behavior v Color and Transparency –ColorInterpolator –TransparencyInterpolator v Position, Rotation, Scale –PositionInterpolator, RotationInterpolator, ScaleInterpolator v Object –SwitchValueInterplator

6 Interpolator Behavior v Position, Rotation, Scale – –PositionInterpolator, RotationInterpolator, ScaleInterpolator v Color and Transparency – –ColorInterpolator – –TransparencyInterpolator v Object – –SwitchValueInterplator

7 Interpolator Behavior

8 PathInterpolator v Interpolate a set of values,knots. –PositionPathInterpolator –RotationPathInterpolator –RotPosPathInterpolator –RotPosScalePathInterpolator v TCBpathSplineInterpolator –For smooth interpolation

9 Billboard v Behavior makes a visual object appear exactly the same when viewed from any angles –Trees in racing games

10 LOD v 거리에 따라 해당하는 geometry 를 고름.

11 Morph v Creates the geometry for a visual object through interpolating form a set of GeometryArray objects. –Deformable object animation v Change any geometry into any other geometry –Pyramids into cubes –Cats into dogs v Animate a visual object –Make a hand grasp

12 Morphing v Morphing is the process of gradually deforming a shape into another one. v For example: –changing a pyramid into a cube –changing a cat into a dog –making a hand grasp  See the Morph class