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0030886: Documentation - provide information about some changes in upgrade 7.4.0

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Modifications added to upgrade guide:
- Font_FontAspect enum digits have different values (0030439),
- Graphic3d_PolygonOffset default value change (0030716),
- AddZLayer inserts layer before Graphic3d_ZLayerId_Top, the previous implementation inserted it above all layers(0030668).
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nds 2019-09-20 17:59:59 +03:00 committed by bugmaster
parent cc50812d6f
commit 8aafd5f9e3
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dox/dev_guides/upgrade/upgrade.md
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@ -1811,6 +1811,34 @@ Forward declarations of *Prs3d_Presentation* should be corrected, since it is no
Proxy classes *SelectBasics_SensitiveEntity* and *SelectBasics_EntityOwner* have been removed - *Select3D_SensitiveEntity* and *SelectMgr_EntityOwner* should be now used directly instead.
@subsection upgrade_740_offset Polygon offset defaults
*Graphic3d_PolygonOffset* default constructor has been corrected to define Units=1 instead of Units=0.
Default polygon offset settings Mode=Aspect_POM_Fill + Factor=1 + Units=1 are intended to push triangulation
(Shaded presentation) a little bit behind of lines (Wireframe and Face Edges)
for reducing z-fighting effect of Shaded+Wireframe combination.
The change in defaults (Units changed from 0 to 1) is intended to cover scenario when camera direction is perpendicular to model plane (like 2D view).
Application observing unexpected visual difference on this change should consider customizing this property within AIS_InteractiveContext default attributes
or on per-presentation basis via *Graphic3d_Aspects::SetPolygonOffset()* methods.
@subsection upgrade_740_zlayer Adding ZLayers in given position
Interface of insertion ZLayer in the viewer has been improved with ability to insert new layer before or after existing one.
Previously undocumented behavior of *V3d_Viewer::AddZlayer()* method has been corrected to insert new layer before *Graphic3d_ZLayerId_Top*.
Applications might need revising their custom layers creation code and specify precisely their order with new methods *V3d_Viewer::InsertLayerBefore()* and *V3d_Viewer::InsertLayerAfter()*.
@subsection upgrade_740_enum_changed Modified enumerations
Applications using integer values of the following enumerations in persistence
should be corrected as these enumerations have been modified:
| Name |
| :----- |
| AIS_TypeOfAttribute |
| Aspect_InteriorStyle |
| Font_FontAspect |
@subsection upgrade_740_geproj Custom defines within env.bat
*env.bat* produced by Visual Studio project generator *genproj.bat* has been modified so that *%CSF_DEFINES%* variable is reset to initial state.