Bobo's Fit UVW Map Script

[Bobo]

It works for me.

You just have to remove the line 'theMap.gizmo.transform' which was not part of the code but part of an explanation.

Here is a shorter version of the loop since you don't even need the object to be selected individually in the modify panel for this to work:

for o in selection do UVWMapFit o o.uvw_Mapping useSel:#none

[em3]

doh! Works great now, thanks Bobo! This will save me heaps of time.

[em3]

It works for me.

You just have to remove the line 'theMap.gizmo.transform' which was not part of the code but part of an explanation.

Here is a shorter version of the loop since you don't even need the object to be selected individually in the modify panel for this to work:

for o in selection do UVWMapFit o o.uvw_Mapping useSel:#none

Well this is odd. I am getting an error now.

Type error: Call needs function or class, got: undefined

I closed/re-opened max and created a box with a uvw. I ran the script below and it errors.

for o in selection do UVWMapFit o o.uvw_Mapping useSel:#none


fn UVWMapFit theObj theMap useSel:#none=
(
--RESET THE GIZMO SCALE FIRST:
--Multiply the gizmo's transformation with the inverse of a matrix created from its scale factor
theMap.gizmo.transform *= inverse (scaleMatrix theMap.gizmo.transform.scalepart)
--RESULT: the gizmo scaling will be reset to [1,1,1]

--GET THE MESH IN OBJECT SPACE BEFORE PRS AND WSM
--NOTE that this will get the mesh from TOP of the modifier stack just before PRS transforms.
--This means that the script SHOULD be applied to the UVW_Mapping modifier only when it is
--the TOP modifier on the stack, otherwise the geometry used might not be the geometry
--that the modifier is really applied to.
theMesh = theObj.mesh

--TRANSFORM ALL VERTICES IN GIZMO SPACE AND FIND MIN. AND MAX. OF GIZMO BBOX
minX = minY = minZ = 100000000 --initialize min.values to very large numbers
maxX = maxY = maxZ = -100000000 --initialize max.values to very low numbers
theTM = theMap.gizmo.transform --store the transformation matrix of the UVW gizmo in a variable
theTMInv = inverse theTM --calculate the inverse of the gizmo TM and store in another variable


--DEPENDING ON THE OPTIONAL 3RD ARGUMENT, GET THE VERTICES TO OPERATE ON:
theVerts = case useSel of
(
--If no selection is defined, use a bitarray containing ALL vertices.
#none: #{1..theMesh.numverts}

--If vertex selection is requested, get the selection from the mesh
#verts: (getVertSelection theMesh)

--if edge selection is requested, convert the edge selection to vertex list:
#edges: (meshop.getVertsUsingEdge theMesh (getEdgeSelection theMesh))

--if face selection is requested, convert the face selection to vertex list:
#faces: (meshop.getVertsUsingFace theMesh (getFaceSelection theMesh))
)


for v in theVerts do --loop through all vertices in the bitarray defined above
(
theVert = (getVert theMesh v) * theTMInv --get the vertex position in gizmo space

--Record min. and max. values for X, Y and Z:
if theVert.x > maxX do maxX = theVert.x
if theVert.y > maxY do maxY = theVert.y
if theVert.z > maxZ do maxZ = theVert.z
if theVert.x < minX do minX = theVert.x
if theVert.y < minY do minY = theVert.y
if theVert.z < minZ do minZ = theVert.z
)--end v loop


delete theMesh --delete the TriMesh value from memory

--CALCULATE THE GIZMO-ALIGNED BOX SIZE
case theMap.axis of --take into account axis orientation
(
0: (
X = maxZ - minZ --gizmo's Z axis is aligned to the object's local X axis
Y = maxY - minY
Z =maxX - minX
)
1: (
X = maxX - minX
Y = maxZ - minZ --gizmo's Z axis is aligned to the object's local Y axis
Z =maxY - minY
)
2: (
X = maxX - minX
Y = maxY - minY
Z = maxZ - minZ --gizmo's Z axis is aligned to the object's local Z axis
)
)--end case

if theVerts.numberset == 0 then --if no vertices processed, set all sizes to 10
X = Y = Z = 10
else --if any vertices are processed, add 0.1 % padding
(
X += 0.001*X
Y += 0.001*Y
Z += 0.001*Z
)

--Set the values for length, width and height in the general case
theMap.length = Y
theMap.width = X
theMap.height= Z

case theMap.maptype of --now take into account the mapping type
(
default: theMap.width = theMap.length = amax #(X,Y) --get the bigger of the two values for width and length
0: () --do nothing for planar mode - will use the above general case
1: (
case theMap.axis of --special axis handling for cylinder!
(
0: (theMap.width = theMap.length = amax #(X,Z); theMap.height = Y)
1: (theMap.width = theMap.length = amax #(Y,Z); theMap.height = X)
2: (theMap.width = theMap.length = amax #(X,Y); theMap.height = Z)
)--end axis case
)
2: theMap.width = theMap.length = theMap.height = amax #(X,Y,Z) --radius from the largest of the 3 values
3: theMap.width = theMap.length = theMap.height = amax #(X,Y,Z) --radius from the largest of the 3 values
4: () --do nothing for box mode - will use the above general case
)--end maptype case

--CALCULATE THE CENTER IN GIZMO SPACE - IT IS THE MIDDLE OF THE BOX'S DIAGONAL
theCenter = ([maxX,maxY,maxZ] + [minX,minY,minZ])/2.0
--CONVERT THE CENTER INTO OBJECT SPACE BY MULTIPLYING WITH THE GIZMO TM
theCenter *= theTM
--THEN CENTER THE GIZMO
theTM.row4 = theCenter --set the translation part of the matrix to the new center
theMap.gizmo.transform = theTM --and assign the matrix back to the gizmo transformation
)--end function

[em3]

sorry dude, it works fine...I was still in the sub options for the UVW map... :banghead:

[Bobo]

sorry dude, it works fine...I was still in the sub options for the UVW map... :banghead:

The real issue is that the LOOP should be AFTER the Function. If you run it a second time, the function will be already defined and then it would run right. You cannot call a function BEFORE it was declared :)

[em3]

The real issue is that the LOOP should be AFTER the Function. If you run it a second time, the function will be already defined and then it would run right. You cannot call a function BEFORE it was declared :)

That's that logic stuff again, isn't it. Makes total sense and I feel like a dope. Thank you!

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