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0032188: Visualization, Graphic3d_Aspects - define backface culling using Graphic3d_TypeOfBackfacingModel

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Graphic3d_Aspects::ToSuppressBackFaces() bool flag has been replaced by
Graphic3d_Aspects::FaceCulling() property defined by Graphic3d_TypeOfBackfacingModel enumeration.

Graphic3d_TypeOfBackfacingModel_Auto corresponds to old ToSuppressBackFaces()==TRUE;
Graphic3d_TypeOfBackfacingModel_DoubleSided corresponds to old ToSuppressBackFaces()==FALSE;
Graphic3d_TypeOfBackfacingModel_BackCulled allows enabling back face culling regardless of Graphic3d_Group::IsClosed() flag.

XCAFDoc_VisMaterial::IsDoubleSided() bool flag has been replaced by
XCAFDoc_VisMaterial::FaceCulling() property defined by Graphic3d_TypeOfBackfacingModel enumeration.

glTF reader now maps "doubleSided" material flag into
Graphic3d_TypeOfBackfacingModel_BackCulled (forced back face culling) and
Graphic3d_TypeOfBackfacingModel_Auto (e.g. practically doubleSided as there is no closed/open info in glTF).

glTF writer by default writes materials as "doubleSided" save the Graphic3d_TypeOfBackfacingModel_BackCulled property set
(in future, extra logic might written for automatically defining singleSided materials for Solid B-Rep objects).

Removed obsolete unused types V3d_TypeOfPickCamera, V3d_TypeOfPickLight, V3d_TypeOfRepresentation, and V3d_Coordinate.
Deprecated types V3d_TypeOfBackfacingModel, V3d_TypeOfLight, and V3d_TypeOfShadingModel.
This commit is contained in:
kgv
2021-03-01 23:25:21 +03:00
committed by bugmaster
parent 42ddd0028c
commit 7fd4958d45
28 changed files with 202 additions and 255 deletions
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15
src/V3d/V3d_View.hxx
View File

@@ -876,18 +876,11 @@ public:
}
//! Manages display of the back faces
//! When <aModel> is TOBM_AUTOMATIC the object backfaces
//! are displayed only for surface objects and
//! never displayed for solid objects.
//! this was the previous mode.
//! <aModel> is TOBM_ALWAYS_DISPLAYED the object backfaces
//! are always displayed both for surfaces or solids.
//! <aModel> is TOBM_NEVER_DISPLAYED the object backfaces
//! are never displayed.
Standard_EXPORT void SetBackFacingModel (const V3d_TypeOfBackfacingModel theModel = V3d_TOBM_AUTOMATIC);
Standard_EXPORT void SetBackFacingModel (const Graphic3d_TypeOfBackfacingModel theModel = Graphic3d_TypeOfBackfacingModel_Auto);
//! Returns current state of the back faces display
Standard_EXPORT V3d_TypeOfBackfacingModel BackFacingModel() const;
//! Returns current state of the back faces display; Graphic3d_TypeOfBackfacingModel_Auto by default,
//! which means that backface culling is defined by each presentation.
Standard_EXPORT Graphic3d_TypeOfBackfacingModel BackFacingModel() const;
//! Adds clip plane to the view. The composition of clip planes truncates the
//! rendering space to convex volume. Number of supported clip planes can be consulted