APIs at the top of this page are the highest-level, providing the most functionality but also requiring the most dependencies.

Each section builds on the next lower one, with the most basic standalone routines at the bottom.

You can use any API level independently. For example, interaction prototyping might target the Application Framework for the support of full game engine, while shader tuning might be best done directly on the Graphics API Abstraction layer.

Bold items are the ones used most frequently.

Application Framework

High-level building blocks for creating applications.

Application	GApp, GApp::Settings,
AR/VR	EmulatedGazeTracker, EmulatedXR, VRApp
3D UI	ControlPointEditor, FirstPersonManipulator, Manipulator, PhysicsFrameSplineEditor, ThirdPersonManipulator, UprightSplineManipulator, Widget, WidgetManager, GameController
Scene Graph	Camera, Entity, Entity::Track, Light, MarkerEntity, Scene, SceneVisualizationSettings, Skybox, SoundEntity, VisibleEntity, ParticleSystem, XRWidget,
3D Models	ArticulatedModel (see also OBJ MTL and ArticulatedModel::Specification), BSPMap, debugDraw, debugDrawLabel, GFont, HeightfieldModel, Shape (ArrowShape, AxesShape,BoxShape, CylinderShape, CapsuleShape, MeshShape, PlaneShape, RayShape, SphereShape, TriangleShape), FontModel, MD2Model, MD3Model, Model, ParticleSystemModel, PointShape, PointModel, VoxelModel
Visual Effects	AmbientOcclusion, AmbientOcclusionSettings, BilateralFilter, DepthOfField, DepthOfFieldSettings, Film, FilmSettings, GaussianBlur, MotionBlur, MotionBlurSettings, TemporalFilter
2D User Interface	ArticulatedModelSpecificationEditorDialog CallbackWidget, CameraControlWindow, ControlPointEditor, DeveloperWindow, EventCoordinateMapper, FileDialog, FullScreenWidget, GConsole, GuiContainer, GuiControl, GuiControl::Callback, GuiCheckBox, GuiButton, GuiDropDownList, GuiFunctionBox, GuiLabel, GuiMenu, GuiNumberBox, GuiPane, GuiRadioButton, GuiTabPane, GuiTheme, GuiScrollPane, GuiSlider, GuiText, GuiTextBox, GuiMultiLineTextBox, GuiTextureBox, GuiWidgetDestructor, GuiWindow, Icon, IconSet, QRcode_encodeString, screenPrintf, SceneEditorWindow, TextureBrowserWindow, VideoRecordDialog

Renderer

Ray Tracing

DirectionHistogram, EmbreeTriTree (Windows only), NativeTriTree, OptiXTriTree (Windows only), PathTracer, Tri, TriTree, TriTreeBase

Materials and Scattering

BumpMap, Material,
Surfel, Surfel::Impulse, UniversalSurfel, UniversalMaterial,
UniversalBSDF

Immediate Mode

DefaultRenderer, Draw, FogVolumeSurface, GBuffer, LightingEnvironment, PointSurface, ParticleSurface, Renderer, ScreenCapture, Surface2D, Surface, SkyboxSurface, TextSurface, VoxelSurface, ShadowMap, SlowMesh, UniversalSurface, UniversalSurface::CPUGeom, UniversalSurface::GPUGeom, VisualizeCameraSurface, VisualizeLightSurface

Graphics API Abstraction

An easy-to-use wrapper for graphics APIs and a platform-independent windowing system.

GLSL Routines	Simple math routines, Polygon clipping, HLSL compatibility, Bicubic filtering, Screen-space ray tracing, Reverse reprojection, Depth buffer, Depth peeling, Octahedral projection, Color gradients, Noise and Hash functions
API Abstraction	Args, BufferTexture, CPUVertexArray, DepthEncoding, DXCaps, Framebuffer, GLCaps, GLPixelTransferBuffer, Milestone, Profiler, BEGIN_PROFILER_EVENT, END_PROFILER_EVENT, RenderDevice, Texture, AttributeArray, VertexBuffer, Sampler, BindlessTextureHandle, Shader, Shader preprocessor, UniformTable, LAUNCH_SHADER, LAUNCH_SHADER_PTR, G3D_MIN_OPENGL_VERSION
AR/VR	GazeTracker, MonitorXR, OpenVR, XR
Windowing	GEvent, GEventType, GKey, GLFWWindow, JoystickIndex, OSWindow, UserInput
OpenGL-Specific Helpers	debugAssertGLOk, DECLARE_GLFORMATOF, getOpenGLState, glCanBeIndex, glClipToBox, glColor, glDisableAllClipping, glDisableAllTextures, glGetCurrentContext, glGetProcAddress, glGetInteger, glGetBoolean, glGetDouble, glGetFloat, glGetMatrix, glLoadMatrix, glLoadInvMatrix, glMakeCurrent, glMultInvMatrix, glMultMatrix, glMutliTexCoord, glNormal, glTexCoord, glToScreen, glVertex, sizeOfGlFormat, glIsNormalizedFixedPoint, glFormatOf, GLenumToString
Audio	AudioChannel, AudioDevice, Sound

Math Library

Core data structures.

Geometry	AABox, AABox2D (Rect2D), Box, Box2D, Capsule, CompassDelta, CompassDirection, CollisionDetection, Cone, ConvexPolygon, ConvexPolygon2D, ConvexPolyhedron, CoordinateFrame, CFrame (CoordinateFrame), CullFace, Cylinder, FOVDirection, Frustum, float16, Intersect, Line, LineSegment, LineSegment2D, MeshAlg, MeshAlg::Geometry, MeshBuilder, Quat, Pathfinder, PathDirection, PhysicsFrame (PFrame), PhysicsFrameSpline, Plane, Point2, Point2int16, Point2uint16, Point2int32, Point2uint32, Point3, Point3int16, Point3int32, Projection, PrecomputedRay, Ray, RayGridIterator, RealTime, Rect2D, Sphere, Spline, SplineInterpolationMode, SplineExtrapolationMode, Triangle, tesselateComplexPolygon, UprightFrame, UprightSpline, Welder
Linear Algebra	Matrix, Matrix2, Matrix3, Matrix4, Matrix4float64, Matrix3x4, Matrix2x3, Vector2, Vector2int16, Vector2uint16, Vector2unorm16, Vector2int32, Vector2uint32, Vector3, Vector3uint8, Vector3int16, Vector3int32, Vector4, Vector4int8, Vector4int16 Vector4uint16
Radiometry	Biradiance, Biradiance3, Color1, Color1unorm8, Color2unorm8, Color3, Color3unorm8, Color4, Color4unorm8, Energy3, Power, Power3, Radiance, Radiance3, Radiosity, Radiosity3, Irradiance, Irradiance3, Surfel
Integer math	BIN8, BIN11, BIN16, BIN32, ceilPow2, highestBit, iAbs, iCeil, iClamp, iWrap, iFloor, iMax, iMin, int8, in16, int32, int64, isPow2, isOdd, isEven, iSign, iRound, roundStochastically, snorm8, snorm16, uint8, uint16, uint32, uint64, uint128, unorm8, unorm16, pow2
Floating point	abs, aCos, aSin, aTan, aTan2, clamp, cyclicCatumullRomSpline, float32, float64, fract, fuzzyEq, fuzzyNe, fuzzyGt, fuzzyGe, fuzzyLt, fuzzyLe, fuzzyEpsilon32, fuzzyEpsilon64, hammersleySequence2D, HaltonSequence, lerp, lerpAngle, linearSpline, log2, sign, rsq, min, max, nextMod3, Noise, Random, PrecomputedRandom, square, squareMagnitude, sinc, sumSquares, distance, toRadians, toDegrees, isNaN, isFinite, inf, nan, wrap, pi, halfPi, rsqrt, smoothstep, smootherstep, signedPow twoPi
String	alphabeticalIgnoringCaseG3DFirstLessThan, beginsWith, buildPrefixTree, endsWith, findSlash, findSlash, format, greatestCommonPrefix isSlash, isWhitespace, isDigit, isNewline, isLetter, isQuote, license, maxNotNPOS, parseCommaSeparated, vformat, wordWrap, stringCompare, stringptrCompare, stringSplit, stringJoin, toUpper, toLower, NEWLINE, String, trimWhitespace, STR
Data structures	Any, AnyTableReader, Array, categorizeByDerivedType, DepthFirstTreeBuilder, FastPointHashGrid, FastPODTable, Grid, isNull, ignoreInt, ignoreFloat, ignoreDouble, ignoreString, KDTree, notNull, PercentageAdapter, PowerOfTwoAdapter, PrefixTree, SquareAdapter, NotAdapter, OrderedTable, PARSE_ANY, Pointer, PointHashGrid, PointKDTree, lazy_ptr, Queue, Set, SmallArray, SmallTable, Table, ThreadsafeQueue, TimeQueue, ReferenceCountedObject, WeakCache
Images and Video	BufferUnmapper, BumpMapPreprocess, CPUPixelTransferBuffer, CubeFace, CubeMap, CubeMapConvention, Image, PixelTransferBuffer, ImageConvert, ImageFormat, Map2D, gaussian1D, VideoInput, VideoOutput, VideoStreamServer, VideoStreamClient, WrapMode
Debug	alwaysAssertM, debugAssert, debugAssertM, describeSystem, isValidHeapPointer, isValidPointer setConsolePrintHook, consolePrintHook, consolePrint, consolePrintf, debugPrintf, logPrintf, Log, setAssertionHook, setFailureHook
Hash Functions	Crypto, MD5Hash, superFastHash, wangHash6432Shift, HashTrait
Utilities and Constants	AlphaFilter, DoNotInitialize, MirrorQuality, PrimitiveType, RefractionHint, ResampleFilter, enumToJavaScriptDeclaration, G3D_DECLARE_ENUM_CLASS(), G3D_DECLARE_ENUM_CLASS_METHODS(), G3D_DECLARE_ENUM_CLASS_HASHCODE(), G3D_BEGIN_ENUM_CLASS_DECLARATION(), G3D_END_ENUM_CLASS_DECLARATION()
Units	In the units namespace: toSeconds, nanometers, micrometers, millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, radians, degrees, nanoseconds, milliseconds, seconds, minutes, hours, days, years

OS Abstraction

Core system functionality.

Files	BinaryInput, BinaryOutput, deserialize, FileNotFound, FilePath, FileSystem, pathConcat, g3dfnmatch, generateFilenameBase, Journal, ParseError, ParseOBJ, ParsePLY, ParseMTL, ParseVOX, readWholeFile, serialize, TextInput, TextOutput, Token, TextInput::WrongTokenType, writeWholeFile, XML, zipfileExists
Network	NetServer, NetSendConnection, NetConnection, NetAddress, networkSendBacklog, networkCommunicationInterval/ setNetworkCommunicationInterval serviceNetwork, WebServer, WebServer::WebSocket, (Deprecated: Discovery::Client, Discovery::Server, Discovery::Settings, LightweightConduit, NetListener, NetworkDevice, ReliableConduit)
Time and Threads	GUniqueID, runConcurrently, Spinlock, Stopwatch, System
CPU Memory	AlignedMemoryManager, AreaMemoryManager, BinaryFormat, binaryFormatOf, BlockPoolMemoryManager, byteSize, CRTMemoryManager, G3DAllocator, G3DEndian, MemoryManager, System::free, System::malloc
Native UI	msgBox, prompt
Initialization	initG3D, G3DSpecification
Macros	G3D_WINDOWS(), G3D_OSX(), G3D_LINUX(), G3D_VER(), PRAGMA(), G3D_BEGIN_PACKED_CLASS(), G3D_END_PACKED_CLASS(), G3D_CHECK_PRINTF_METHOD_ARGS(), G3D_CHECK_VPRINTF_METHOD_ARGS(), G3D_CHECK_PRINTF_ARGS(), G3D_CHECK_VPRINTF_ARGS(), G3D_START_AT_MAIN(), G3D_DECLARE_SYMBOL, G3D_DEBUG()