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haplokuon / netDxf

.net dxf Reader-Writer
MIT License
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Text position and extrusion #171

Closed Baryad closed 4 years ago

Baryad commented 4 years ago

Hello, Daniel!

I'm trying to add the text on Z axis up 400mm and on XZ plane The version is netDXF.2.2.0.1

var textEntity = new Text("test", Vector3(0, 400, 0), 20); textEntity.Normal = Vector3(0,-1,0); textEntity.Rotation = 0;

The position in dxf is not the same as expected 10 0.0 20 0.0 30 -400.0 and extrusion is correct 210 0.0 220 -1.0 230

In AutoCAD it's located at (0,400,0) instead on (0,0,400) The expected values in dxf are 10 0.0 20 400.0 30 0.0

image

(It looks like the same issue is with the circle transformations. Is it the same case?)

Thank you, Sergey!

haplokuon commented 4 years ago

The text position as the circle center are defined in world coordinates, it is in the documentation. As you said you want the text at (0, 0, 400) WCS, therefore just pass that point to the Text constructor instead of (0, 400, 0). The DXF format stores those points in local coordinates, this is one of the many questionable decisions of the DXF specification.

Baryad commented 4 years ago

Thank you, Daniel! My bad! I had to read the documentation more carefully. With the switching from OCS to WCS texts and circles are working as expected.