SISmoothEnvWght
v2.0
Smooths the weighting of envelope points. An envelope is an
object or hierarchy that is assigned as a "skin" to a set of
deformers such as IK chains. Envelopes move and deform in response
to the movements of their deformers. In this way, for example, a
character moves as you animate its skeleton.
Every point in an envelope is assigned to one or more deformers.
For each point, weights control the relative influence of its
deformers.
oReturn = SISmoothEnvWght( PropObj, [SubComp] ); |
Returns an XSICollection that contains the new envelope operators.
| Parameter | Type | Description |
|---|---|---|
| PropObj | String | Envelope weights property to be modified. |
| SubComp | String | List of
points/objects/clusters to be smoothed.
Default Value: Current selection |
'This example creates an envelope on "BodyMan" model, with less bones
'than usual (2 nulls for the body, 1 bone per arm).
'
'The default envelope assignment doesn't give a correct separation
'between the arms and the body, so we will use LocalAssignFlexEnv,
'SISmoothEnvWght and SymEnvWeight in order to modify the weight assignment.
NewScene
GetPresetModel "Man", "Man"
'Create basic skeletons: 2 for the arms, plus 2 nulls for the body
Create2DSkeleton -1.9, 17.0, 0, -5.15, 17.0, 0, 0, 0, 0, 4
Set Null0 = GetPrim("Null")
Translate Null0, 0, 15.049359948647, 0, siRelative, siView, siObj, siXYZ
Set Null1 = GetPrim("Null")
Translate Null1, 0, 3.76822515334527, 0, siRelative, siView, siObj, siXYZ
DuplicateSymmetry "B:root", True, False, 1, 0, 0, 0, True
ApplyFlexEnv "Man.Man;root1,bone1,eff1,root,bone,eff,null,null1", False
'We want the head and the center of the body to be only assigned
'to the 2 Nulls, so let's do it using LocalAssignFlexEnv
LocalAssignFlexEnv "Man.Man.pnt[0,2-23,25,26,28-30,34-99,101,103-109,"_
& "113,116-120,122,124-143,145-203,212-220,222-227,229-250,252-279,"_
& "281-284,286-295,297-299,302,304-307,310-315,317,319,321,322,324,"_
& "326-329,332-350,353-359,361,362,365,366,368-379,381,383,385,387,"_
& "389,391,393,395-414,625,629-694,696,698-704,708,711-715,717,719-738,"_
& "740-778,787-795,797-802,804-825,827-854,856-859,861-870,872-874,877,"_
& "879-882,885-890,892,894,896,897,899,901-904,907-925,928-934,936,937,"_
& "940,941,943-954,956,958,960,962,964,966,968,970-989]",_
"Man.Man;null,null1", 2
Rotate "bone", 0, 0, 58.5, siRelative, siAdd, siObj, siXYZ
Translate Null1, 0, 2, 4.0, siRelative, siView, siObj, siXYZ
'Because of the local reassignment, we can see that the shoulder's weight
'assignation is no longer smooth. Let's smooth it using SISmoothEnvWght.
'We increase the smoothing depth for better results.
Set SmoothOp = SISmoothEnvWght( , "Man.Man.pnt[0,2-23,25,26,28-30,34-99,"_
& "101,103-109,113,116-120,122,124-143,145-183,186-189,197-203,215,217-219,"_
& "221,228,229,251,259,271,280,285,287,289,290,292,294,296,298,300,301,303,"_
& "307-309,316,318,320,322,323,325,330,331,333,338,341,345,349,351,352,360,"_
& "363,364,366,367,369,371,402-406,409-432,434,436,439-446,625,629-694,696,"_
& "698-700,702,703,708,711-715,717,719-738,740-778,793,804,834,864,865,867,"_
& "873,897,908,913,924,941,944,977,980,981,985,986,989]")
SetValue SmoothOp & ".neighborhooddepth", 3
Rotate "bone1", 0, 0, 59.625, siRelative, siAdd, siObj, siXYZ
'The same problem occurs on the right shoulder. Since we have corrected the
'left shoulder, let's simply mirror the weights from left to right in order
'to propagate the changes symmetrically.
Set SymTemplate = CreateSymmetryMappingTemplate("Man.Man", True, 0, True)
SymEnvWeight , "Man.Man.pnt[0-32,34-101,103-113,115-219,221-224,226-230,"_
& "233-236,239-262,264-266,268-275,277-285,287-318,320-326,328-354,356-390,"_
& "392-400,402-621]", SymTemplate
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