CGA Shape Grammar Reference

Operations Shape Attributes Builtin Functions Other Keywords CGA Utilities Misc Information

This page provides an overview of the operations and functions available in CGA. Visit the CGA Modeling Essentials to learn the foundations of the CGA Shape Grammar.

Operations

Geometry Creation

envelope extrude footprint i (insert) insertAlongUV offset primitiveCone primitiveCube primitiveCylinder primitiveDisk primitiveQuad primitiveSphere roofGable roofHip roofPyramid roofRidge roofShed taper

Geometry Subdivision

comp innerRectangle scatter setback setbackPerEdge setbackToArea shapeL shapeO shapeU split splitAndSetbackPerimeter splitArea

Geometry Manipulation

cleanupGeometry convexify deleteHoles mirror modify rectify reduceGeometry resetGeometry reverseNormals setNormals softenNormals trim

Geometry Tagging

deleteTags setTagsFromEdgeAttrs tag

Rule Inlining and Boolean 3D

inline intersect subtract union

Texturing

copyUV deleteUV normalizeUV projectUV rotateUV scaleUV setupProjection texture tileUV translateUV

Transformations

center r (scope rotate) rotate s (scope size) t (scope translate) translate

Scope

alignScopeToAxes alignScopeToGeometry alignScopeToGeometryBBox mirrorScope rotateScope setPivot

Flow Control

NIL pop push

Context

label

Attributes

color print report resetMaterial set setMaterial

Shape Attributes

Shape attributes are properties of the current shape. They can always be read like functions, and some of them can be set with the set operation.

comp initialShape material pivot scope seedian split trim

Builtin Functions

Functions always return a value and do not alter the current shape, with the exception of probability functions, which change the state of the shape's random number generator.

Math Functions

abs acos asin atan atan2 ceil cos exp floor isinf isnan ln log10 pow rint sin sqrt tan

Probability Functions

p rand

Conversion Functions

bool boolArray float floatArray isNull sel str stringArray

String Functions

count find len splitString substring

Geometry Functions

geometry.area geometry.angle geometry.boundaryLength geometry.{du|dv} geometry.groups geometry.hasTags geometry.hasUVs geometry.height geometry.isClosedSurface geometry.isConcave geometry.isInstanced geometry.isOriented geometry.isPlanar geometry.isRectangular geometry.materials geometry.nEdges geometry.nFaces geometry.nHoles geometry.nVertices geometry.tags geometry.{uMin|uMax|vMin|vMax} geometry.volume

Material Functions

getMaterial readMaterial

File Functions

fileExists fileSearch / filesSearch readFloatTable readStringTable readTextFile

Asset and Image Functions

assetInfo assetMetadata assetNamingInfo / assetNamingInfos assetsSortRatio assetsSortSize imageInfo imagesSortRatio

Occlusion Functions

inside overlaps touches

Context Functions

minimumDistance contextCompare contextCount

Array Functions

array initialization colon operator comp findFirst index operator nColumns nRows setElems size sortIndices sortRowIndices sum transpose

Edge Attribute Functions

edgeAttr.getFloat edgeAttr.getString edgeAttr.getBool

Miscellaneous Functions

convert getGeoCoord getTreeKey print Simple types operators Array types operators

Other Keywords

attr const extension import start style with version

CGA Utility Functions Library

String Utility Functions

findFirst findLast getPrefix getRange getSuffix replace

String List Utility Functions

String lists are a series of strings stored inside one string. The elements are separated by a semicolon (;). The data type is string, thus it is not a real array type as used in other scripting languages.

listAdd listClean listCount listFirst listFromArray listIndex listItem listLast listRandom listRange listRemove listRemoveAll listRetainAll listSize listTerminate listToArray

File, Asset and Image Utility Functions

assetApproxRatio assetApproxSize assetBestRatio assetBestSize assetFitSize fileBasename fileDirectory fileExtension fileName fileRandom imageApproxRatio imageBestRatio

Math Utility Functions

clamp max min

Color Utility Functions

colorHexToB colorHexToG colorHexToH colorHexToO colorHexToR colorHexToS colorHexToV colorHSVToHex colorHSVOToHex colorRamp colorRGBToHex colorRGBOToHex

Miscellaneous Information

CGA Changelog Annotations Asset Search Builtin Assets Texturing Euler Angles Context Queries Component Tags Shape Recomposition