animation
Opens the Expression Editor for the expressions on the given
parameters.
An expression is a string of characters that may include object and
parameter names, mathematical operators, and tokens representing
functions or constants. For example, to constrain object A's Y
rotation to object B's X translation, you would set an expression
on A.kine.local.roty consisting of the string
B.kine.local.posx.
An expression is a mathematical formula that you can use to control
any parameter that can be animated, such as translation, rotation,
scaling, material, or texture. You can create almost any connection
you like between parameters, from simple "A = B" relationships to
very complex ones using predefined variables, standard math
functions, random number generators, and more.
For more information on expressions, see the Animation guide.
EditExpr( [InputObj] ); |
| Parameter | Type | Description |
|---|---|---|
| InputObj | String | List of parameters (for
example "cone*/kine.local.pos").
Default Value: Currently selected and marked parameters |
'
' This example sets an expression on a parameter using the SetExpr
' command and then uses the EditExpr command to open the Expression
' Editor to inspect the new expression.
'
NewScene , false
' Create the object on which to set the expression
set oDonut = CreatePrim( "Torus", "NurbsSurface" )
' Make sure the last frame will be set to 100
SetValue "PlayControl.Out", 100
' Set a key frame at frame 1, with XPos = -30
SaveKey oDonut & ".kine.local.posx", 1, -30
' Set another key frame at frame 100, with XPos = 30
SaveKey oDonut & ".kine.local.posx", 100, 30
' Temporarily disable cycle checking (this
' expression creates a cycle on purpose)
bCyclePref = GetValue( "preferences.data_management.disable_cycle_checking" )
SetValue "preferences.data_management.disable_cycle_checking", True
' Animate the YPos parameter with an expression
SetExpr oDonut & ".kine.local.posy", _
"5*sin(" & oDonut & ".kine.local.posx * 15)"
' Restore cycle checking to its previous value
SetValue "preferences.data_management.disable_cycle_checking", bCyclePref
' Now display the Expression Editor to see the results
EditExpr oDonut & ".kine.local.posy"
|