Class Geometry

constructor

• new Geometry(gl, attributes?, transformFeedbacks?): Geometry

• Create a geometry object.

  Parameters

  • gl: WTCGLRenderingContext

    The WTCGL Rendering context
  • attributes: WTCGLGeometryAttributeCollection = {}

    A collection of attributes for the geometry. Typically includes vertex positions in 2 or 3d, normals etc.
  • OptionaltransformFeedbacks: TransformFeedback

  Returns Geometry

attributes

bounds

drawRange

gl

glState

id

instancedCount

isInstanced

transformFeedbackIndex

transformFeedbacks

VAOs

addAttribute

• addAttribute(key, attr): void

• Add an attribute

  Parameters

  • key: string

    The key for the attribute
  • attr: WTCGLGeometryAttribute

    The Geometry attribute, basically the data to be injected

  Returns void

bindAttributes

• bindAttributes(program): void

• Binds all attributes as derived from the program to attribute objects supplied to the geometry

  Parameters

  • program: Program

    The program to use to determine attribute locations

  Returns void

bindTransformFeedbacks

• bindTransformFeedbacks(): void

• Returns void

computeBoundingBox

• computeBoundingBox(attr?): void

• Computes the bounding box of the geometry. If no attribute is provided to compue with, try to use the position attribute array by default.

  Parameters

  • Optionalattr: WTCGLGeometryAttribute

    The attribute array to compute the bounding box off

  Returns void

computeBoundingSphere

• computeBoundingSphere(attr?): void

• Computes the bounding sphere of the geometry. If no attribute is provided to compue with, try to use the position attribute array by default.

  Parameters

  • Optionalattr: null | WTCGLGeometryAttribute

    The attribute array to compute the bounding box off

  Returns void

createVAO

• createVAO(program): void

• Create a new vertex array object bind Attributes to it

  Parameters

  • program: Program

    The program to use to determine attribute locations

  Returns void

draw

• draw(__namedParameters): void

• Draw the geometry

  Parameters

  • __namedParameters: {
        mode: number;
        program: Program;
    }

    The parameters to be used for the draw command

    • mode: number

    • program: Program

  Returns void

getPosition

• getPosition(): undefined | WTCGLGeometryAttribute

• Returns the position atribute array

  Returns undefined | WTCGLGeometryAttribute

remove

• remove(): void

• Remoce all of the vertex array objects and buffers from memory

  Returns void

setDrawRange

• setDrawRange(start, count): void

• Sets up the draw range, used to determined which properties are drawn

  Parameters

  • start: number

    The start of the range
  • count: number

    The number of properties to draw

  Returns void

setInstancedCount

• setInstancedCount(value): void

• Sets up the number of instances to draw

  Parameters

  • value: number

    The number of geometry instances to draw

  Returns void