2009
Table Of Contents
- Contents
- Overview
- Maya Basics
- Polygonal Modeling
- Introduction
- Preparing for the lesson
- Lesson 1: Modeling a polygonal mesh
- Introduction
- Setting modeling preferences
- Using 2D reference images
- Creating a polygon primitive
- Modeling in shaded mode
- Model symmetry
- Selecting components by painting
- Selecting edge loops
- Editing components in the orthographic views
- Editing components in the perspective view
- Drawing a polygon
- Extruding polygon components
- Bridging between edges
- Adding polygons to a mesh
- Splitting polygon faces
- Terminating edge loops
- Deleting construction history
- Mirror copying a mesh
- Working with a smoothed mesh
- Creasing and hardening edges on a mesh
- Beyond the lesson
- NURBS Modeling
- Subdivision Surfaces
- Animation
- Introduction
- Preparing for the lessons
- Lesson 1: Keyframes and the Graph Editor
- Lesson 2: Set Driven Key
- Lesson 3: Path animation
- Lesson 4: Nonlinear animation with Trax
- Introduction
- Open the first scene for the lesson
- Creating clips with Trax
- Changing the position of clips with Trax
- Editing the animation of clips
- Reusing clips within Trax
- Soloing and muting tracks
- Scaling clips within Trax
- Open the second scene for the lesson
- Creating clips from motion capture data
- Extending the length of motion capture data
- Redirecting the motion within a clip
- Beyond the lesson
- Lesson 5: Inverse kinematics
- Introduction
- Open the scene for the lesson
- Understanding hierarchies
- Viewing hierarchies using the Hypergraph
- Creating a skeleton hierarchy
- Parenting a model into a skeleton hierarchy
- Applying IK to a skeleton hierarchy
- Creating a control object for an IK system
- Constraining an IK system
- Limiting the range of motion of an IK system
- Simplifying the display of a hierarchy
- Applying parent constraints on an IK system
- Planning an animation for an IK system
- Animating an IK system
- Beyond the lesson
- Character Setup
- Polygon Texturing
- Rendering
- Introduction
- Preparing for the lessons
- Lesson 1: Rendering a scene
- Introduction
- Open the scene for the lesson
- Creating shading materials for objects
- Refining shading materials for objects
- Maya renderers
- Rendering a single frame using IPR
- Rendering using the Maya software renderer
- Batch rendering a sequence of animation frames
- Viewing a sequence of rendered frames
- Beyond the lesson
- Lesson 2: Shading surfaces
- Lesson 3: Lights, shadows, and cameras
- Lesson 4: Global Illumination
- Lesson 5: Caustics
- Dynamics
- Painting
- Introduction
- Preparing for the lessons
- Lesson 1: Painting in 2D using Paint Effects
- Lesson 2: Painting in 3D using Paint Effects
- Introduction
- Preparing for the lessons
- Brushes and strokes
- Rendering Paint Effects strokes
- Paint Effects on 3D objects
- Creating a surface to paint on
- Painting on objects
- Using turbulence with brush stroke tubes
- Using additional preset brushes
- Mesh brushes
- Converting mesh strokes to polygons
- Modifying a converted polygonal mesh
- Beyond the lesson
- Lesson 3: Painting textures on surfaces
- Expressions
- Scripting in Maya
- Index
4 On the Translate Y curve, select the left-most key point and move its
right tangent handle up slightly.
5 At the key point where the bounce occurs on the Translate Y curve, move
the left tangent handle up a bit. This raises the high part of the curve left
of that key point, which makes the ball rise higher over the fence.
6 If you want to change the shape of Translate Y curve but lack adequate
control with the existing key points, you can add a key point at the
position of your choice. (No key points were added in the prior figures.)
To add a key, click the Add Keys Tool icon, select the curve, and
middle-click the desired position on or off the curve.
Deleting extra keyframes and static channels
As you set keys, you often create many unintended keys. For example, when
you used the Set Key operation on the ball, Maya created keys on all transform
node attributes of the ball, for instance Rotate Z, not just the intended Translate
X and Translate Y attributes. The curves representing such attributes have
unchanging values. The attributes are known as static channels.
You can identify static channels by examining animation curves in the Graph
Editor. If a curve is horizontally flat its whole length, the value of the attribute
it represents isn’t changing. The attribute is a static channel. Static channels
slow Maya processing, so it’s beneficial to remove them in complex scenes.
To delete static channels
1 From the main menu, select Edit > Delete by Type > Channels, Static
Channels, Non-particle Expressions.
This deletes all unnecessary keys for all objects in the scene. Alternatively,
you can remove the static channels for a selected object with Edit > Delete by
Type > Channels, Static Channels, Non-particle Expressions.
In addition to static channels, you’ll often create excess keys—keys that aren’t
being used to control the shape of a curve. Whenever you see three key points
that lie in a straight line, the one in the middle is unnecessary. For example,
in this lesson’s original Translate X curve, there were four redundant keys:
198 | Chapter 6 Animation