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0033551: Visualization - Add new transform persistence mode to force orthographic projection on object.

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The new transform persistence mode, with flag `Graphic3d_TMF_OrthoPers`, can be combined (bitwise OR operation) with the other persistence modes (2D, Trihedron or Zoom/Rotate Persistence) to make objects be rendered with orthographic projection when it is on a view with perspective projection.

If the view already uses orthographic projection, there will be no difference.

This feature was implemented to fix ViewCube being distorted when view with perspective projection changes size.
This commit is contained in:
rodrlyra
2023-12-11 16:37:36 +00:00
committed by vglukhik
parent cb290cc932
commit f035e0718b
20 changed files with 432 additions and 102 deletions
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71
src/ViewerTest/ViewerTest.cxx
View File

@@ -5100,6 +5100,24 @@ static int VDisplay2 (Draw_Interpretor& theDI,
aTrsfPers = new Graphic3d_TransformPers (aTrsfPers->Mode(), Aspect_TypeOfTriedronPosition (aCorner), Graphic3d_Vec2i (aZ.IntegerValue()));
}
}
else if (aNameCase == "-trsfPersOrtho")
{
if (aTrsfPers.IsNull())
{
Message::SendFail() << "Error: wrong syntax at " << aName << ".";
return 1;
}
toSetTrsfPers = Standard_True;
if (aTrsfPers->IsZoomOrRotate())
{
aTrsfPers = new Graphic3d_TransformPers (aTrsfPers->Mode() | Graphic3d_TMF_OrthoPers, aTrsfPers->AnchorPoint());
}
else if (aTrsfPers->IsTrihedronOr2d())
{
aTrsfPers = new Graphic3d_TransformPers (aTrsfPers->Mode() | Graphic3d_TMF_OrthoPers, aTrsfPers->Corner2d(), aTrsfPers->Offset2d());
}
}
else if (aNameCase == "-layer"
|| aNameCase == "-zlayer")
{
@@ -6630,42 +6648,45 @@ If last 3 optional parameters are not set prints numbers of U-, V- isolines and
addCmd ("vdisplay", VDisplay2, /* [vdisplay] */ R"(
vdisplay [-noupdate|-update] [-mutable] [-neutral]
[-trsfPers {zoom|rotate|zoomRotate|none}=none]
[-trsfPers {zoom|rotate|zoomRotate|trihedron|none}=none]
[-trsfPersPos X Y [Z]] [-3d]
[-2d|-trihedron [{top|bottom|left|right|topLeft
|topRight|bottomLeft|bottomRight}
[offsetX offsetY]]]
[-trsfPersOrtho]
[-dispMode mode] [-highMode mode]
[-layer index] [-top|-topmost|-overlay|-underlay]
[-redisplay] [-erased]
[-noecho] [-autoTriangulation {0|1}]
name1 [name2] ... [name n]
Displays named objects.
-noupdate Suppresses viewer redraw call.
-mutable Enables optimizations for mutable objects.
-neutral Draws objects in main viewer.
-erased Loads the object into context, but does not display it.
-layer Sets z-layer for objects.
Alternatively -overlay|-underlay|-top|-topmost
options can be used for the default z-layers.
-top Draws object on top of main presentations
but below topmost.
-topmost Draws in overlay for 3D presentations.
with independent Depth.
-overlay Draws objects in overlay for 2D presentations.
(On-Screen-Display)
-underlay Draws objects in underlay for 2D presentations.
(On-Screen-Display)
-noupdate Suppresses viewer redraw call.
-mutable Enables optimizations for mutable objects.
-neutral Draws objects in main viewer.
-erased Loads the object into context, but does not display it.
-layer Sets z-layer for objects.
Alternatively -overlay|-underlay|-top|-topmost
options can be used for the default z-layers.
-top Draws object on top of main presentations
but below topmost.
-topmost Draws in overlay for 3D presentations.
with independent Depth.
-overlay Draws objects in overlay for 2D presentations.
(On-Screen-Display)
-underlay Draws objects in underlay for 2D presentations.
(On-Screen-Display)
-selectable|-noselect Controls selection of objects.
-trsfPers Sets a transform persistence flags.
-trsfPersPos Sets an anchor point for transform persistence.
-2d Displays object in screen coordinates.
(DY looks up)
-dispmode Sets display mode for objects.
-highmode Sets hilight mode for objects.
-redisplay Recomputes presentation of objects.
-noecho Avoid printing of command results.
-autoTriang Enable/disable auto-triangulation for displayed shape.
-trsfPers Sets a transform persistence flags.
-trsfPersPos Sets an anchor point for transform persistence.
-2d Displays object in screen coordinates.
(DY looks up)
-trsfPersOrtho Set orthographic transform persistence.
(Objects shown with orthographic projection)
-dispmode Sets display mode for objects.
-highmode Sets hilight mode for objects.
-redisplay Recomputes presentation of objects.
-noecho Avoid printing of command results.
-autoTriang Enable/disable auto-triangulation for displayed shape.
)" /* [vdisplay] */);
addCmd ("vnbdisplayed", VNbDisplayed, /* [vnbdisplayed] */ R"(

7
src/ViewerTest/ViewerTest_ViewerCommands.cxx
View File

@@ -13686,6 +13686,12 @@ static int VViewCube (Draw_Interpretor& ,
{
aViewCube->SetAxesSphereRadius (Draw::Atof (theArgVec[++anArgIter]));
}
else if (anArg == "-orthopers")
{
const Handle(Graphic3d_TransformPers)& aTrsfPers = aViewCube->TransformPersistence();
Handle(Graphic3d_TransformPers) anOrthoPers = new Graphic3d_TransformPers (Graphic3d_TMF_TriedronPers | Graphic3d_TMF_OrthoPers, aTrsfPers->Corner2d(), aTrsfPers->Offset2d());
aViewCube->SetTransformPersistence (anOrthoPers);
}
else
{
Message::SendFail() << "Syntax error: unknown argument '" << anArg << "'";
@@ -14983,6 +14989,7 @@ Displays interactive view manipulation object. Options:
-axesSphereRadius Value radius of the sphere (central point) of trihedron
-fixedAnimation {0|1} uninterruptible animation loop
-duration Seconds animation duration in seconds
-orthoPers force orthographic projection persistence.
)" /* [vviewcube] */);
addCmd ("vcolorconvert", VColorConvert, /* [vcolorconvert] */ R"(