Open CASCADE Technology Version 7.4.0 Release Notes

Open CASCADE Technology

7.3.0. release theprevious over corrections and improvements 7.4.0 Technology CASCADE Open Overview

Open CASCADE Technology

y g o l o n h c e T E D A C S A C n e p O www.opencascade.com

Release Notes O Version 7.4.0 ctober

1 , 2019,

provides

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500

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   Draw    Data Exchange              Visualization           Modeling Highlights

Option to simplify result to Option ofBoolean Operation the suppress to historyOption to speed up Boolean generation Enabled robustness Improved and stabilityBoolean of operations BRepMesh control linear interior to Options deflectionin partangular and of the faces for I Improved Improved Fixed with issues Draw starting batch from Harness ViewerImproved 3D manipulations camera ofXDESupport (assemblydata colors, in names) to export VRML structure, ofsome Support non New t Removed Remov ofreadingSupport encoded Possibility withtextures show shapes to dynamic (video) Option Option Option Improved tools for managemImproved font manipulations camera New class of clipping planes Support S Improve of API Removal throat” ofchamfer creationNew modes “constant new A triangulation Possibility calculate to mproved robustness,mproved performance and BRepMesh accuracy algorithm of performanceelection Test ools to import glTF import data to mesh from ools

interface for interface part offetchinginfinite box for finite

al to to exclude to d supportd ofembedded Linux platforms

Boolean Operations solids on open

of of the display

support ofrunning dependency display AIS_ViewController AIS_ViewController

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deprecated Context Local functionality

for www.opencascade.com the

shrunk mesh shrunk mesh presentation

seam edges from display Wireframe visualization performance

old Boolean Operations old - outline outline of ASCII encodings ASCII STEP import in

s from gl2ps from improvement

urface ent

combinations

bitmap image from memory buffer Draw Harness

and s converting

haded objects

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2.0 OBJ and formats user input (mouse, touchscreen) user properties shapesof with

analysis environment withoutCASROOTenvironment

in scripts

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from from AIS

and Extrema

peration

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    Other

Sample ViewerSample of 3D Optimization of TPrsStd_AISPresent convenient Tools efficient and for traversestructuresof BVH Improved performance built of

y g o l o n h c e T E D A C S A C n e p O www.opencascade.com

integration

- parallelizationin routines in glfw application

ation attribute

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(OSD_Parallel)

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      Robustness and quality    Performance   Internal code descendants: of thecontext issue Major improvements ofthe BRepMesh component been have implemented the in Improvements cases corner were tosome that handle before. hard of process generation mesh BRepover OCCT’s componentBRepMesh refactored. has been simplifiesthe new The architecture BRepMesh of Refactoring NewFeatures

ups on specific casesups NURBSsurfaces. of to improvements resolveSome unrestricted consumption of me deflection; improvementsAdditional separately theirfaces boundaries; from Two new parameters Improved presentation spheres of near poles; seam Improved presentation cones of edges;near representation;discrete Pre edges the in of face ofre Localization partially in processing mode; parallel ofc Execution tessellationEdges parallel mo in separation Clear of as structures data Newa internal

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Open CASCADE Technology

7.3.0 OCCT V Examples

isual improvements

y g o l o n h c e T E D A C S A C n e p O www.opencascade.com

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y g o l o n h c e T E D A C S A C n e p O www.opencascade.com

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comparing times to 7.3.0: times. performance~93000 The caseon this been improvedhas shapean aboveThe assemblywhere singlesolid contains a box isreplicated P 7.3.0 OCCT A erformance improvements ccuracy improvements

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  optimizations such as: implement the classes tree descendBVH taking traversconvenient New BVHstructures of traverse convenient forTools > incmeshshape > dparallel > ploadMODELING command Harness parametersDraw the parallelization can be adjusted new via Test implem OSD_Parallel::For() between TBB either built using or If preallocat working OSD_ThreadPool::Launcher usage CPU resources by algorithms OCCT sizeglobal The of number threads nestingthread(previously independent loop each level created and ba fromresources better multithreaded execution willlowerdue reusable overhead to threadfrom benefit with support. pool improved thread Algorithms relying on Built tasks multithreaded pool for Thread Meshing details toFor the related thestructure and before. as side to visualapplication obtain qualitythe same presentation and/or performance of be necessaryit may parameters call tune theBRepMesh of of to algorithm on the thenewIn version Implicationson porting

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ReadObj can New be accessed from readers Draw viacommands Harness RWMesh_CoordinateSystemConverter coordinate systemsreaders allowand system input (see file as parameters defining CAD systems Y OBJ) glTF (and most use files MTL (from Polygonsfile). are automatically triangles tools. into using BRepMesh split reading supports reader polygonal (groups)OBJ colorsnames information, and OCCT building fromcode. source library, RapidJSON (HAVE_RAPIDJSON)whichrelies on beshould enabled while preserves Reader files. namestriangulation, structure, scene and colors. T (glTF +common bin), embedded (base64 supports versions 1.0and glTF reader 2.0 of specifications format and handles currentlyformat file features, unsupp Low structures relyingleveland reader internal on introduced have been New classes Tools into elements the tree. T   optimizations are already imple between somemin/max distance object and BVH tree betweenor twotrees. BVH All New classes    Th   leaf and rejection node acceptance: classes use these toTo user needs implementthe methods rulesthe defining the for

he new e optimizationse the methods traverse of tree for are optional: traverse. IsMetricBetter de RejectMetric Accept rejected. the comparison of criteria box withand the if some define shouldnode be RejectNode trees trees case ofIn the case ofIn Stop - level reader can be used translating reader into for level data non

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Open CASCADE Technology

application. and robustit can be used more rapid integration ofViewerOCCTfor 3D into supports twoand withcooperates class Viewer. 3D This standardsupports mouse varioustouchpad, keyboard)(mouse, devices camera onto manipulations in OCCT n A Controller View > vviewcubevc > vinit > ploadVISUALIZATION can be Newactivated Draw in via object the Harness used scheme by smo vertices, AIS_ViewCube global axescoordinate of system. indicating toalternative n A view cube Interactive > vfit > XDisplay > vinit > ReadGltfDBuggy.gltf > ploadXDEVISUALIZATION

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timings. with frame extended. tools The Tools Viewerprofilingfor 3D integrated into performance OCCT have been viewer performance of 3D analysis forTools > vclipplanepln > vdisplayb > vinit > boxb204010030 > ploadMODELINGVISUALI Drawclippingcan beIn activated via Harness, chains command Graphic3d_ClipPlane::SetChainNextPlane() Graphic3d_ClipPlane boxand presentations. section previously.This in supportedoperation addition to Clippingdefining Planes logical(disjunction) OR Viewer3D nowCl supports viewer 3D in clipping Complex experienceuser within cameraperspective projection. utilizesView also Controller from picking information services in QtQuickapplication.and redirectingsuccessfullyfor input used user from GUI is,however, framework thescope class beyond of this user providing integration acrossexperience uniform The platforms. with particular Draw already benefi Harness

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Open CASCADE Technology

> vsetcolorbg255 255 > vinit > pspheres1 > boxb201 3 > ploadMODELINGVISUALIZATION like this: used arewithinNew available Draw options command Harness to possible (see boundaries withflag whichallows Viewer3D nownew supports flag outline shape of displayDynamic > vrenderparams > vdisplayvc > vviewcubevc > vinit > ploadVISUALIZATION vrenderparams onscreencounters performance canThe be Draw in viaactivated command Harness Graphic3d_RenderingParams::and activ OCCT toolscan These be helpful for

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Open CASCADE Technology

> vaspectsbs > vfit > vdisplay

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setFaceBoundaryColor BLACK setFaceBoundaryDraw 1 dispMode 1bs

y g o l o n h c e T E D A C S A C n e p O setDrawSilhouette 1 www.opencascade.com

setMostContinuity c0 - setEdgeColor BLACK

- setInteriorStyle HIDDENLINE

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