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Advances in Qt 3D Kévin Ottens, Software Craftsman at KDAB

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Page 1: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AdvancesinQt3DKévinOttens,SoftwareCraftsmanatKDAB

Page 2: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AdvancesinQt3D

AdvancesinQt3D p.2

FeatureSet

EntityComponentSystem?What'sthat?

HelloDonut

InputHandling

AnimationwithQt3D

NewPBRMaterials

PaintedTextures

IntegratingQtQuickwithQt3Dagain

CapturingtheRendering

LevelofDetail

DisplayingText

TheFutureofQt3D

Page 3: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AdvancesinQt3D

FeatureSet p.3

FeatureSet

EntityComponentSystem?What'sthat?

HelloDonut

InputHandling

AnimationwithQt3D

NewPBRMaterials

PaintedTextures

IntegratingQtQuickwithQt3Dagain

CapturingtheRendering

LevelofDetail

DisplayingText

TheFutureofQt3D

Page 4: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

WhatisQt3D?

FeatureSet p.4

Itisnotabout3D!

Multi-purpose,notjustagameengine

Softreal-timesimulationengine

Designedtobescalable

Extensibleandflexible

Page 5: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

SimulationEngine

FeatureSet p.5

Thecoreisnotinherentlyabout3D

ItcandealwithseveralfunctionaldomainsatonceAI,logic,audio,etc.Andofcourseitcontainsa3Drenderertoo!

AllyouneedforacomplexsystemsimulationMechanicalsystemsPhysics...andalsogames

Page 6: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

Scalability

FeatureSet p.6

Frontend/backendsplitFrontendislightweightandonthemainthreadBackendexecutedinasecondarythreadWheretheactualsimulationruns

Non-blockingfrontend/backendcommunication

Backendmaximizesthroughputviaathreadpool

Page 7: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

ExtensibilityandFlexibility

FeatureSet p.7

Functionaldomainscanbeaddedbyextendingtheruntime...onlyifthere'snotsomethingfittingyourneedsalready

ProvidebothC++andQMLAPIs

IntegrateswellwiththerestofQtPullingyoursimulationdatafromadatabaseanyone?

EntityComponentSystemisusedtocombinebehaviorinyourownobjectsNodeepinheritancehierarchy

Page 8: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AdvancesinQt3D

EntityComponentSystem?What'sthat? p.8

FeatureSet

EntityComponentSystem?What'sthat?

HelloDonut

InputHandling

AnimationwithQt3D

NewPBRMaterials

PaintedTextures

IntegratingQtQuickwithQt3Dagain

CapturingtheRendering

LevelofDetail

DisplayingText

TheFutureofQt3D

Page 9: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

ECS:Definitions

EntityComponentSystem?What'sthat? p.9

ECSisanarchitecturalpatternPopularingameenginesFavorscompositionoverinheritance

Anentityisageneralpurposeobject

Anentitygetsitsbehaviorbycombiningdata

Datacomesfromtypedcomponents

Page 10: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

EntityComponentSystem

EntityComponentSystem?What'sthat? p.10

TheEntity/ComponentdatasplitgivesflexibilitytomanagetheAPI

TheSystemseparationmovesthebehaviorawayfromdataavoidingdependenciesbetweenComponents

Page 11: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AdvancesinQt3D

HelloDonut p.11

FeatureSet

EntityComponentSystem?What'sthat?

HelloDonut

InputHandling

AnimationwithQt3D

NewPBRMaterials

PaintedTextures

IntegratingQtQuickwithQt3Dagain

CapturingtheRendering

LevelofDetail

DisplayingText

TheFutureofQt3D

Page 12: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

HelloDonut(QML)

HelloDonut p.12

GoodpracticehavingrootEntitytorepresentthescene

OneEntityper"object"inthescene

Objectsgivenbehaviorbyattachingcomponentsubclasses

ForanEntitytobedrawnitneeds:AmeshgeometrydescribingitsshapeAmaterialdescribingitssurfaceappearance

Demoqt3d/ex-hellodonut-qml

qmlElement://Entity
qmlElement://Entity
qmlElement://Entity
Page 13: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

C++APIvsQMLAPI

HelloDonut p.13

QMLAPIisamirroroftheC++API

C++classnamesliketherestofQt

QMLelementnamesjustdon'thavetheQinfrontQt3DCore::QNodevsNodeQt3DCore::QEntityvsEntity...

class://Qt3DCore::QNode
qmlElement://Node
class://Qt3DCore::QEntity
qmlElement://Entity
Page 14: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AdvancesinQt3D

InputHandling p.14

FeatureSet

EntityComponentSystem?What'sthat?

HelloDonut

InputHandling

AnimationwithQt3D

NewPBRMaterials

PaintedTextures

IntegratingQtQuickwithQt3Dagain

CapturingtheRendering

LevelofDetail

DisplayingText

TheFutureofQt3D

Page 15: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

PreviouslyinInputHandling

InputHandling p.15

PhysicaldevicessuchasKeyboardDeviceandMouseDeviceproduceevents

HandlerssuchasKeyboardHandlerandMouseHandler:ProcesseventsbyconvertingeventstosignalsforusercodetoreacttoArecomponentsthatshouldbeaddedtoEntitystoprovidebehaviorrelatedtoinput

ObjectPickerprovideshigh-levelpickingfunctionality

LogicalDevices:AllowanalogaxisvaluestobeproducedAllowmappingmultiplephysicaldevicesontoAxisandActionelements

qmlElement://KeyboardDevice
qmlElement://MouseDevice
qmlElement://KeyboardHandler
qmlElement://MouseHandler
qmlElement://Entity
qmlElement://ObjectPicker
qmlElement://LogicalDevice
qmlElement://Axis
qmlElement://Action
Page 16: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

HowtoControlaValueoverTime?

InputHandling p.16

ObviouslyusinganAxis

Butwegotonlytheaxisposition...

ForceustouseimperativecodeexecutedinthemainthreadTypicallyincrementavaluebasedontheaxispositionNeedstosampleovertime(andeventuallyintegrate!)

OruseAxisAccumulatorwhichdoesitforyouManagethevalueovertimebasedonaninputaxisCantreattheaxispositionasavelocityoranaccelerationAlltheworkisdoneinsecondarythreads

qmlElement://Axis
qmlElement://AxisAccumulator
Page 17: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AxisAccumulator(since5.8)

InputHandling p.17

1 importQt3D.Input2.92 ...34 LogicalDevice{5     axes:Axis{6         id:mouseYAxis7         AnalogAxisInput{8             sourceDevice:mouseDevice9             axis:MouseDevice.Y10         }11     }12 }1314 AxisAccumulator{15     sourceAxis:mouseYAxis16     sourceAxisType:AxisAccumulator.Velocity17     scale:5018     //Canbindonvalue19 }

Demoqt3d/sol-moving-boxes-qml-step3

Demoqt3d/sol-moving-boxes-qml-step4

Page 18: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AdvancesinQt3D

AnimationwithQt3D p.18

FeatureSet

EntityComponentSystem?What'sthat?

HelloDonut

InputHandling

AnimationwithQt3D

NewPBRMaterials

PaintedTextures

IntegratingQtQuickwithQt3Dagain

CapturingtheRendering

LevelofDetail

DisplayingText

TheFutureofQt3D

Page 19: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AnimationSupportinQt3D

AnimationwithQt3D p.19

YoucoulduseQtQuickanimationsbut...TheyareexecutedonthemainthreadTheyarenotsynchronizedwiththeQt3Dengineframerate

Instead,youcanhaveanimationsintheQt3DenginebyregisteringtheQt3DAnimation::QAnimationAspect

LikeanyotheraspectitthenprovidesAPI,mainlytypesinheritingfrom:AbstractAnimationClipwhichcontainthedatarepresentingagivenanimationAbstractClipAnimator,Componentswhichrunclipsandmapthemtoothercomponentsproperties

class://Qt3DAnimation::QAnimationAspect
qmlElement://AbstractAnimationClip
qmlElement://AbstractClipAnimator
qmlElement://Component
Page 20: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AnimationClip,aKeyFrameBasedClip

AnimationwithQt3D p.20

AnimationCliprepresentsakeyframebasedclip

ItholdstheAnimationClipDatainitsclipDataproperty

CurrentlyAnimationClipDatainstancescanonlybecreatedfromC++

ClipdatahasasetofQChanneldescribingthepropertiesknowtotheclip

EachQChannelhasoneormoreQChannelComponentallowingtorepresentcomplextypesTypicallyacolorchannelhasthreechannelcomponents

AQChannelComponentisalistofkeyframesforthegivenchannelcomponent

qmlElement://AnimationClip
qmlElement://AnimationClipData
qmlElement://AnimationClipData
class://QChannel
class://QChannel
class://QChannelComponent
class://QChannelComponent
Page 21: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AnimationClipLoader

AnimationwithQt3D p.21

CreatingaAnimationClipanditsdatacanbetediousandhardtomaintain

Alsoitisnotaccessibletoartists

AnimationClipLoadercanloadaclipfromaJSONfileTheformatiseasytoexportfromadesigntoolCurrentlyapluginforBlenderisavailable

1 importQt3D.Animation2.92 ...34 AnimationClipLoader{source:"qrc:/animation.json"}5 ...

Demoqt3d/ex-animationclip-loader

qmlElement://AnimationClip
qmlElement://AnimationClipLoader
Page 22: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

HowtoRunanAnimationClip?

AnimationwithQt3D p.22

1 importQt3D.Animation2.92 ...3 ClipAnimator{4     clip:AnimationClipLoader{source:"qrc:/animation.json"}56     channelMapper:ChannelMapper{7         ChannelMapping{8             channelName:"Location"9             target:transform10             property:"translation"11         }12         ChannelMapping{13             channelName:"Rotation"14             target:transform15             property:"rotation"16         }17         ChannelMapping{18             channelName:"Color"19             target:material20             property:"ambient"21         }22     }23 }24 ...

Demoqt3d/ex-animationclip-loader

Page 23: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AnimationBlending

AnimationwithQt3D p.23

Itisoftenusefultocombineseveralanimationsintoone

Makesiteasiertotunesimpleranimationsseparately,thenlettheenginecombinethem

Thisisdoneviablendingoperators

Makesitpossibletocreatenewvariationsfromabasicsetofanimations

Typicalexamplesingamesare:AcharacterwalkingthenstartingtorunAcharacterjumpingwhilewalkingorduringthetransitionbetweenwalkingandrunning

Page 24: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

BlendedClipAnimator

AnimationwithQt3D p.24

1 importQt3D.Animation2.92 ...3 BlendedClipAnimator{4     blendTree:AdditiveClipBlend{5     additiveFactor:0.46     baseClip:LerpClipBlend{7         blendFactor:0.28         startClip:ClipBlendValue{9             clip:AnimationClipLoader{source:"qrc:/walk.json"}10         }11         endClip:ClipBlendValue{12             clip:AnimationClipLoader{source:"qrc:/run.json"}13         }14     }15     additiveClip:ClipBlendValue{16         clip:AnimationClipLoader{source:"qrc:/jump.json"}17     }18 }19 ...

Demoqt3d/sol-toyplane-pilot

Page 25: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AdvancesinQt3D

NewPBRMaterials p.25

FeatureSet

EntityComponentSystem?What'sthat?

HelloDonut

InputHandling

AnimationwithQt3D

NewPBRMaterials

PaintedTextures

IntegratingQtQuickwithQt3Dagain

CapturingtheRendering

LevelofDetail

DisplayingText

TheFutureofQt3D

Page 26: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

Metal/RoughMaterials

NewPBRMaterials p.26

Qt3D5.9introducestwonewmaterialswithmuchmorerealisticrenderingQt3DExtras::QMetalRoughMaterialQt3DExtras::QTexturedMetalRoughMaterial

Thisisbasedonproperphysicstomodelthelighting

Italsointroducesnewricherlights

QtDemoqt3d-examples/pbr-textured-cube

QtDemoqt3d-examples/pbr-sphere

QtDemoqt3d-examples/pbr-spheres

class://Qt3DExtras::QMetalRoughMaterial
class://Qt3DExtras::QTexturedMetalRoughMaterial
Page 27: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

EnvironmentLight(since5.9)

NewPBRMaterials p.27

1 importQt3D.Core2.02 importQt3D.Render2.93 ...45 components:[6     EnvironmentLight{7         irradiance:TextureLoader{...}8         specular:TextureLoader{...}9     }10 ]

Demoqt3d/ex-lights-qml

Page 28: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

SkyBox(since5.9)

NewPBRMaterials p.28

1 importQt3D.Extras2.92 ...34 SkyboxEntity{5     baseName:"radianceTexture"6     extension:".dds"7     gammaCorrect:true//Since5.98 }

Demoqt3d/ex-lights-qml

Page 29: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AdvancesinQt3D

PaintedTextures p.29

FeatureSet

EntityComponentSystem?What'sthat?

HelloDonut

InputHandling

AnimationwithQt3D

NewPBRMaterials

PaintedTextures

IntegratingQtQuickwithQt3Dagain

CapturingtheRendering

LevelofDetail

DisplayingText

TheFutureofQt3D

Page 30: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

IntegratingQPainterCode(since5.8)

PaintedTextures p.30

Often,wehavelegacyQPaintercode

NeedsintegrationtobeusablewithTextures

ProvidedbyQt3DRender::QPaintedTextureImageInheritfromitOverridethepaint()functionUselikeanyotherTextureImage

Demoqt3d/ex-painted-cube

class://QPainter
qmlElement://Texture
class://Qt3DRender::QPaintedTextureImage
qmlElement://TextureImage
Page 31: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AdvancesinQt3D

IntegratingQtQuickwithQt3Dagain p.31

FeatureSet

EntityComponentSystem?What'sthat?

HelloDonut

InputHandling

AnimationwithQt3D

NewPBRMaterials

PaintedTextures

IntegratingQtQuickwithQt3Dagain

CapturingtheRendering

LevelofDetail

DisplayingText

TheFutureofQt3D

Page 32: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

TheScene2DElement(since5.9)

IntegratingQtQuickwithQt3Dagain p.32

ProvidedbytheQtQuick.Scene2Dmodule

TakesanItemaschildwhichwillbeyourwhole2Dscene

Itrendersthe2DsceneintoaRenderTargetOutputcontrolledbytheoutputpropertyItstexturecanbeusedbyanymaterial

TheentitiespropertyallowstodeclareonwhichentitiesthetexturewillbeusedNecessaryformouseeventhandlingRequiresPickingSettings.TrianglePickingtobesettohavethetriangleinformation

MouseeventsareonlyacceptedifthemouseEnabledpropertyistrue

Demoqt3d/ex-samegame

qmlElement://QtQuick.Scene2D
qmlElement://Item
qmlElement://RenderTargetOutput
Page 33: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AdvancesinQt3D

CapturingtheRendering p.33

FeatureSet

EntityComponentSystem?What'sthat?

HelloDonut

InputHandling

AnimationwithQt3D

NewPBRMaterials

PaintedTextures

IntegratingQtQuickwithQt3Dagain

CapturingtheRendering

LevelofDetail

DisplayingText

TheFutureofQt3D

Page 34: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

TheRenderCaptureElement(since5.9)

CapturingtheRendering p.34

Allowstocreatescreenshotsofthescenerendering

Alsoallowstodebugcomplexmulti-passrenderingOnecansaveasanimageoneoftheintermediatesteps

RenderCaptureisaFrameGraphNode

Eachtimeacaptureisneeded,acalltorequestCapture()isnecessarySuchrequestsareprocessedasynchronously

qmlElement://RenderCapture
qmlElement://FrameGraphNode
Page 35: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

DebuggingMulti-PassRendering

CapturingtheRendering p.35

Thesceneallowstoselectobjectsbyclickingonthem

Aselectedobjectglows

Theeffectisimplementedusingamulti-passrender

WithRenderCaptureitiseasiertoseewhateachstageisdoing

Demoqt3d/sol-screenshot

qmlElement://RenderCapture
Page 36: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AdvancesinQt3D

LevelofDetail p.36

FeatureSet

EntityComponentSystem?What'sthat?

HelloDonut

InputHandling

AnimationwithQt3D

NewPBRMaterials

PaintedTextures

IntegratingQtQuickwithQt3Dagain

CapturingtheRendering

LevelofDetail

DisplayingText

TheFutureofQt3D

Page 37: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

ComplexObjectsvsDistance

LevelofDetail p.37

Scenesoftencontaincomplexobjects

Suchobjectsareexpensivetodisplay

Doesitstillmakesenseiftheyarefarfromthecamera?

Withlevelofdetailmanagement,simplerobjectscanbedisplayedinstead

ThisfeatureisprovidedwithLevelOfDetailandLevelOfDetailLoader

qmlElement://LevelOfDetail
qmlElement://LevelOfDetailLoader
Page 38: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

TheLevelOfDetailElement(since5.9)

LevelofDetail p.38

1 importQt3D.Render2.92 ...34 SphereMesh{5     slices:rings6     rings:[30,6,4][lod.currentIndex]7 },8 LevelOfDetail{9     id:lod10     camera:mainCamera11     thresholds:[100,500,1000]12     thresholdType:LevelOfDetail.DistanceToCameraThreshold13 }14 ...

Demoqt3d/ex-lod

Demoqt3d/sol-ogrehead

Page 39: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AdvancesinQt3D

DisplayingText p.39

FeatureSet

EntityComponentSystem?What'sthat?

HelloDonut

InputHandling

AnimationwithQt3D

NewPBRMaterials

PaintedTextures

IntegratingQtQuickwithQt3Dagain

CapturingtheRendering

LevelofDetail

DisplayingText

TheFutureofQt3D

Page 40: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

ExtrudedTextMeshes(since5.9)

DisplayingText p.40

GeneratinggeometryoutoftextisdonewithExtrudedTextGeometryorExtrudedTextMesh

TheycanbeusedlikeanyotherGeometryorGeometryRenderer

fontandtextarecontrolledusingproperties

Thelengthoftheextrusioniscontrolledwiththedepthproperty

Demoqt3d/ex-text-3d

qmlElement://ExtrudedTextGeometry
qmlElement://ExtrudedTextMesh
qmlElement://Geometry
qmlElement://GeometryRenderer
Page 41: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

DistanceFieldText(since5.9)

DisplayingText p.41

DistancefieldtextisprovidedbyText2DEntity

ThisisafullfledgedEntitytoputintheobjecttree

font,colorandtextarecontrolledusingproperties

Thesizeofthesurfaceonwhichthetextisrenderedcanbecontrolledviawidthandheight

Demoqt3d/ex-text-2d

qmlElement://Text2DEntity
qmlElement://Entity
Page 42: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

AdvancesinQt3D

TheFutureofQt3D p.42

FeatureSet

EntityComponentSystem?What'sthat?

HelloDonut

InputHandling

AnimationwithQt3D

NewPBRMaterials

PaintedTextures

IntegratingQtQuickwithQt3Dagain

CapturingtheRendering

LevelofDetail

DisplayingText

TheFutureofQt3D

Page 43: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

ShaderGraphs(comingin5.10)

TheFutureofQt3D p.43

Currentlydifficulttoreuseandtunematerials

Forcedtoforktheshaderimplementations...

IntroducingShaderProgramBuilderwhichallowstoloadshadersfromagraph

JSONformat

Finergrainedbuildingblockswhichcanbereusedandreorganized

qmlElement://ShaderProgramBuilder
Page 44: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

ShaderGraphs:QMetalRoughMaterial

TheFutureofQt3D p.44

Page 45: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

ShaderGraphscont'd

TheFutureofQt3D p.45

Page 46: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

WhatdoesthefutureholdforQt3D?

TheFutureofQt3D p.46

Qt3DCoreEfficiencyimprovemmentsBackendthreadpoolandjobhandlingimprovements-jobsspawningjobs

Qt3DRenderBillboards-camerafacingentitiesParticlesystems

Qt3DInputAdditionalinputdevicesupport3Dmousecontrollers,gamecontrollers

Enumeratedinputssuchas8-waybuttons,hatswitchesordials

Page 47: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

WhatdoesthefutureholdforQt3D?

TheFutureofQt3D p.47

Newaspects:CollisionDetectionAspectAllowstodetectwhenentitiescollideorenter/exitvolumesinspace

AnimationAspectSkeletalanimationMorphtargetanimationRemovesanimationworkloadfrommainthread

PhysicsAspectRigidbodyandsoftbodyphysicssimulation

AIAspect,3DPositionalAudioAspect...

Tooling:Designtimetooling-sceneeditorBuildtimetooling-assetconditionersformeshes,texturesetc.

Page 48: Advances in Qt 3D - change | ervin...Advances in Qt 3D Advances in Qt 3D p.2 Feature Set Entity Component System? What's that? Hello Donut Input Handling Animation with Qt 3D New PBR

Thankyou!

www.kdab.com

[email protected]


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