How to engrave text on the mesh

[ParvGuptaSpCT]

Hello Devs!!

I'm trying to replicate the Text om Mesh feature in MeshInspector App shown below in python.

I came across alignTextToMesh method in meshlib but unable to align the text. I've included the code snippet and the error I'm receiving.

params = mm.TextMeshAlignParams()
params.text = "Mesh 01"
params.fontDetalization = 2
params.align = mm.AlignType.Left
params.fontHeight = 2.5
params.direction = direction
params.surfaceOffset = -1
params.startPoint = mesh.findClosestPoint(point).mtp
params.textNormal = mm.Vector3f(0, 1, 0)
mm.alignTextToMesh(mesh, params)

Error: Cannot align text

Please let me know whether I'm moving in the right way and what I can modify to make it work.

Thanks

[Grantim]

Hello!
Could you please provide mesh along with direction and point parameters, so we could reproduce the error?

[Grantim]

the link does not provide access to the mesh, could please check it?

[ParvGuptaSpCT]

@Grantim
try this: https://drive.google.com/file/d/1tTJjoGyylYOEzltchDwKgJqJ4mXRe2Pc/view?usp=sharing

[Grantim]

It seems that direction and font size does not fit here (also to use custom text normal you need to specify one in c++ style, because it is optional parameters, or just use default value):
So here is your script with some fixes

params = mm.TextMeshAlignParams()
params.text = "Mesh 01"
params.fontDetalization = 2
params.align = mm.AlignType.Left
params.fontHeight = 1.1 # 2.5 is too large fot this configuration
params.surfaceOffset = -1
params.startPoint = mesh.findClosestPoint(point).mtp
params.direction = direction

normal = mm.Vector3f(0, 1, 0)
params.textNormal = normal # do not set normal from local variable (starting with next release it should be OK)
textMesh = mm.alignTextToMesh(mesh, params)

Here is slightly updated script with fixed direction

params = mm.TextMeshAlignParams()
params.text = "Mesh 01"
params.fontDetalization = 2
params.align = mm.AlignType.Left
params.fontHeight = 0.8 # use smaller font size
params.surfaceOffset = 1
params.startPoint = mesh.findClosestPoint(point).mtp
params.direction = mm.cross( mesh.normal(params.startPoint),mm.Vector3f.plusZ()).normalized() # calculate direction based on surface normal and occlusal direction
textMesh = mm.alignTextToMesh(mesh, params)

[Grantim]

Such parameters produce result more close to your initial screenshot:

point = mm.Vector3f(37.397, 31.17, 11.549)

params = mm.TextMeshAlignParams()
params.text = "Mesh 01"
params.fontDetalization = 2
params.pivotPoint = mm.Vector2f(0.5,0.5)
params.fontHeight = 2.5
params.surfaceOffset = 1
params.startPoint = mesh.findClosestPoint(point).mtp
normal = mm.Vector3f.plusY()
params.textNormal = normal
params.direction = mm.Vector3f.minusX()
textMesh = mm.alignTextToMesh(mesh, params)

[ParvGuptaSpCT]

Thanks @Grantim, it seems to work for me