When engraving text in the mesh, the text engraving appears reversed

[leye123]

Hello, MeshLib Team!
I came across alignTextToMesh method in meshlib but unable to align the text. But I found that part of the text I created is on the other side of the model.

The code and data are as follows:

`

text = "wwwwWWW"
point1 = mm.Vector3f(34.913, -10.890, 6.468)
point2 = mm.Vector3f(17.289, 18.910, 3.531)

params = mm.TextMeshAlignParams()
params.text = text
params.fontDetalization = 2
params.align = mm.AlignType.Center
params.fontHeight = 2  # use smaller font size
params.surfaceOffset = 2
params.pathToFontFile = fontsize
params.fontBasedSizeCalc = True
# params.symbolsThicknessOffsetModifier = 0.01
params.startPoint = mesh.findClosestPoint(point1).mtp
params.direction = (point2-point1).normalized()
textMesh = mm.alignTextToMesh(mesh, params)
textMesh = mm.boolean(mesh, textMesh , mm.BooleanOperation.DifferenceAB).mesh

`

data:

model.zip

[Grantim]

Hello!

It seems that the problem here is badly aligned direction of the text

I suggest that direction like this should work better:

text = "wwwwWWW"
point1 = mm.Vector3f(34.913, -10.890, 6.468)
point2 = mm.Vector3f(17.289, 18.910, 3.531)

params = mm.TextMeshAlignParams()
params.text = text
params.fontDetalization = 2
params.align = mm.AlignType.Center
params.fontHeight = 2  # use smaller font size
params.surfaceOffset = 2
params.pathToFontFile = fontsize
params.fontBasedSizeCalc = True
# params.symbolsThicknessOffsetModifier = 0.01
params.startPoint = mesh.findClosestPoint(point1).mtp

# use direction that is tangent to mesh
dir = (point2-point1).normalized()
norm = mesh.normal(params.startPoint)
params.direction = mm.cross(mm.cross( norm, dir ),norm).normalized()

textMesh = mm.alignTextToMesh(mesh, params)
textMesh = mm.boolean(mesh, textMesh , mm.BooleanOperation.DifferenceAB).mesh

[leye123]

Thank you for your help. I have another question: I came across a function called alignContoursToMesh. Could you provide some examples of how to call this function?

[Grantim]

Sure, this function is basically very close to alignTextToMesh but it aligns arbitrary closed 2d contours

# prepare some contour
image = mm.ImageLoad.fromAnySupportedFormat(__file__+"/../icon.png") # load our logo for example
imageDM = mm.convertImageToDistanceMap(image,0,False)
pl = mm.distanceMapTo2DIsoPolyline(imageDM,20) # extract isoline
pl.transform(mm.AffineXf2f.linear(mm.Matrix2f.scale(2/imageDM.dims().x))) # scale it to be size 2 in wolrd space by X coordinate

point1 = mm.Vector3f(34.913, -10.890, 6.468)
point2 = mm.Vector3f(17.289, 18.910, 3.531)

params = mm.ContoursMeshAlignParams()
params.meshPoint = mesh.findClosestPoint(point1).mtp
params.pivotPoint = mm.Vector2f.diagonal(0.5) # for example - contours center to 'meshPoint'

dir = (point2-point1).normalized()
norm = mesh.normal(params.meshPoint)
params.xDirection = mm.cross(mm.cross( norm, dir ),norm).normalized()
params.extrusion = 2

contoursMesh = mm.alignContoursToMesh(mesh,pl.contours(), params)
contoursMesh = mm.boolean(mesh, contoursMesh , mm.BooleanOperation.DifferenceAB).mesh

[leye123]

Thank you for your help.