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0030662: Documentation - update programming example in Visualization user guide

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"A programming example" section has been updated to provide a working code.
This commit is contained in:
kgv 2020-09-11 17:37:37 +03:00 committed by abv
parent 897aeb207f
commit 0784d6e3cb
1 changed files with 10 additions and 12 deletions
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22
dox/user_guides/visualization/visualization.md
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@ -1542,40 +1542,38 @@ Handle(OpenGl_GraphicDriver) aGraphicDriver = new OpenGl_GraphicDriver (aDispCon
// create a Viewer to this Driver
Handle(V3d_Viewer) aViewer = new V3d_Viewer (aGraphicDriver);
aViewer->SetDefaultBackgroundColor (Quantity_NOC_DARKVIOLET);
aViewer->SetDefaultViewProj (V3d_Xpos);
// Create a structure in this Viewer
Handle(Graphic3d_Structure) aStruct = new Graphic3d_Structure (aViewer->Viewer());
Handle(Graphic3d_Structure) aStruct = new Graphic3d_Structure (aViewer->StructureManager());
aStruct->SetVisual (Graphic3d_TOS_SHADING); // Type of structure
// Create a group of primitives in this structure
Handle(Graphic3d_Group) aPrsGroup = new Graphic3d_Group (aStruct);
Handle(Graphic3d_Group) aPrsGroup = aStruct->NewGroup();
// Fill this group with one quad of size 100
Handle(Graphic3d_ArrayOfTriangleStrips) aTriangles = new Graphic3d_ArrayOfTriangleStrips (4);
aTriangles->AddVertex (-100./2., -100./2., 0.0);
aTriangles->AddVertex (-100./2., 100./2., 0.0);
aTriangles->AddVertex ( 100./2., -100./2., 0.0);
aTriangles->AddVertex ( 100./2., 100./2., 0.0);
Handle(Graphic3d_AspectFillArea3d) anAspects = new Graphic3d_AspectFillArea3d (Aspect_IS_SOLID, Quantity_NOC_RED,
Quantity_NOC_RED, Aspect_TOL_SOLID, 1.0f,
Graphic3d_NOM_GOLD, Graphic3d_NOM_GOLD);
aPrsGroup->SetGroupPrimitivesAspect (anAspects);
aPrsGroup->AddPrimitiveArray (aTriangles);
aPrsGroup->SetGroupPrimitivesAspect (new Graphic3d_AspectFillArea3d());
// Create Ambient and Infinite Lights in this Viewer
Handle(V3d_AmbientLight) aLight1 = new V3d_AmbientLight (Quantity_NOC_GRAY50);
Handle(V3d_DirectionalLight) aLight2 = new V3d_DirectionalLight (V3d_XnegYnegZneg, Quantity_NOC_WHITE);
Handle(V3d_DirectionalLight) aLight2 = new V3d_DirectionalLight (V3d_Zneg, Quantity_NOC_WHITE, true);
aViewer->AddLight (aLight1);
aViewer->AddLight (aLight2);
aViewer->SetLightOn();
// Create a 3D quality Window with the same DisplayConnection
Handle(Xw_Window) aWindow = new Xw_Window (aDispConnection, "Test V3d", 100, 100, 500, 500);
aWindow->Map(); // Map this Window to this screen
// Create a Perspective View in this Viewer
Handle(V3d_View) aView = new V3d_View (aViewer);
aView->Camera()->SetProjectionType (Graphic3d_Camera::Projection_Perspective);
// Associate this View with the Window
aView->SetWindow (aWindow);
// Display ALL structures in this View
aViewer->Viewer()->Display();
// Display presentation in this View
aStruct->Display();
// Finally update the Visualization in this View
aView->Update();
// Fit view to object size