110 lines
2.9 KiB
Python
110 lines
2.9 KiB
Python
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"""
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Remove unassigned UVs
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"""
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from maya import OpenMaya
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from maya import cmds
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def checkUnassignedUVs():
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bads = []
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sel = cmds.ls(sl=True, fl=True, long=True)
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if len(sel) == 0:
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cmds.error("Nothing is selected")
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return
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root = sel[0]
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children = cmds.listRelatives(root, ad=True, type="mesh", fullPath=True)
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sel = OpenMaya.MSelectionList()
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for i in children:
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sel.add(i)
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# OpenMaya.MGlobal.getActiveSelectionList(sel)
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dagPath = OpenMaya.MDagPath()
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for i in range(sel.length()):
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sel.getDagPath(i, dagPath)
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fnMesh = OpenMaya.MFnMesh(dagPath)
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numAllUVs = fnMesh.numUVs()
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uvCounts = OpenMaya.MIntArray()
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uvIds = OpenMaya.MIntArray()
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fnMesh.getAssignedUVs(uvCounts, uvIds)
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numAssignedUVs = len(set(uvIds))
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if numAllUVs != numAssignedUVs:
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bads.append(dagPath.fullPathName())
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return bads
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def removeUnassignedUVs():
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sel = OpenMaya.MSelectionList()
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OpenMaya.MGlobal.getActiveSelectionList(sel)
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if sel.length() == 0:
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cmds.error('Nothing is selected')
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return
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dagPath = OpenMaya.MDagPath()
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sel.getDagPath(0, dagPath)
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fnMesh = OpenMaya.MFnMesh(dagPath)
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uArray = OpenMaya.MFloatArray()
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vArray = OpenMaya.MFloatArray()
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fnMesh.getUVs(uArray, vArray)
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uvCounts = OpenMaya.MIntArray()
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uvIds = OpenMaya.MIntArray()
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fnMesh.getAssignedUVs(uvCounts, uvIds)
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# This is UVs that are actually assgined to the geometry
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# So you have to keep UVs of those indices.
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# Then you have to remove all non-assgined UVs(what we call ghost UVs)
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oldUVIndicesSorted = sorted(list(set(uvIds)))
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# Remap old indices to new clean indices
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# eg. [x, x, x, 3, x, x, 6, x, x, 9, x, ....] (x means unassigned UVs to be removed)
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# |
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# [3, 6, 9, ...] <- Remove Unassgined UVs and pack left UVs
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# |
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# [0, 1, 2, ...] <- Remap to clean order
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# Create new dict which key is old uv indices and value is new uv indices
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# In the above example, { 3:0, 6:1, 9:2, .... }
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uvMap = {}
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for num, oldUVIndex in enumerate(oldUVIndicesSorted):
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uvMap[oldUVIndex] = num
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# Replace old UV indices of each face to new UV indices
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newUvIds = OpenMaya.MIntArray()
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for i in uvIds:
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newUvIds.append(uvMap[i])
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# Construct u and v arrays using only assigned UVs
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newUs = [uArray[i] for i in oldUVIndicesSorted]
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newVs = [vArray[i] for i in oldUVIndicesSorted]
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# Convert python new uvArrays from python list to MFloatArray
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newUArray = OpenMaya.MFloatArray()
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newVArray = OpenMaya.MFloatArray()
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for i in newUs:
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newUArray.append(i)
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for i in newVs:
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newVArray.append(i)
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# Clear current uvSet and re-assgin new UV information
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fnMesh.clearUVs()
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fnMesh.setUVs(newUArray, newVArray)
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fnMesh.assignUVs(uvCounts, newUvIds)
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fnMesh.updateSurface()
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if __name__ == "__main__":
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removeUnassignedUVs()
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