Class GlGeometrySystem`Advanced`

System plugin to the renderer to manage geometry.

Implements

System

Index

Constructors

Properties

hasInstance hasVao

Methods

bind destroy destroyAll draw resetState updateBuffers

Constructors

constructor

new GlGeometrySystem(renderer: WebGLRenderer): GlGeometrySystem
Parameters
- renderer: WebGLRenderer
  The renderer this System works for.
Returns GlGeometrySystem

Properties

`Readonly`hasInstance

hasInstance: boolean

true if has ANGLE_instanced_arrays extension.

`Readonly`hasVao

hasVao: boolean

true if we has *_vertex_array_object extension.

Methods

bind

bind(geometry?: Geometry, program?: GlProgram): void
Binds geometry so that is can be drawn. Creating a Vao if required
Parameters
- Optionalgeometry: Geometry
  Instance of geometry to bind.
- Optionalprogram: GlProgram
  Instance of program to use vao for.
Returns void

destroy

destroy(): void
Generic destroy methods to be overridden by the subclass

Returns void
Implementation of System.destroy

destroyAll

destroyAll(contextLost?: boolean): void
Dispose all WebGL resources of all managed geometries.
Parameters
- OptionalcontextLost: boolean = false
  If context was lost, we suppress gl.delete calls
Returns void

draw

draw(
    topology?: Topology,
    size?: number,
    start?: number,
    instanceCount?: number,
): this
Draws the currently bound geometry.
Parameters
- Optionaltopology: Topology
  The type primitive to render.
- Optionalsize: number
  The number of elements to be rendered. If not specified, all vertices after the starting vertex will be drawn.
- Optionalstart: number
  The starting vertex in the geometry to start drawing from. If not specified, drawing will start from the first vertex.
- OptionalinstanceCount: number
  The number of instances of the set of elements to execute. If not specified, all instances will be drawn.
Returns this
This instance of the geometry system.

resetState

resetState(): void
Reset and unbind any active VAO and geometry.

Returns void

updateBuffers

updateBuffers(): void
Update buffers of the currently bound geometry.

Returns void