'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 SILocalAssignFlexEnv
'(in non-interactive mode)
SILocalAssignFlexEnv "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", False, 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