PixiJS

Class: GlGeometrySystem

GlGeometrySystem

System plugin to the renderer to manage geometry.

new GlGeometrySystem (renderer)

ts:56
Name Type Description
renderer WebGLRenderer

The renderer this System works for.

Implements

Members

hasInstance boolean readonly

true if has ANGLE_instanced_arrays extension.

hasVao boolean readonly

true if we has *_vertex_array_object extension.

Methods

bind (geometry, program) void

ts:114

Binds geometry so that is can be drawn. Creating a Vao if required

Name Type Attributes Description
geometry Geometry <optional>

Instance of geometry to bind.
program GlProgram <optional>

Instance of program to use vao for.

destroyAll (contextLost) void

ts:310

Dispose all WebGL resources of all managed geometries.

Name Type Attributes Default Description
contextLost boolean <optional>
 false

If context was lost, we suppress gl.delete calls

draw (topology, size, start, instanceCount) this

ts:424

Draws the currently bound geometry.

Name Type Attributes Description
topology Topology <optional>

The type primitive to render.
size number <optional>

The number of elements to be rendered. If not specified, all vertices after the starting vertex will be drawn.
start number <optional>

The starting vertex in the geometry to start drawing from. If not specified, drawing will start from the first vertex.
instanceCount number <optional>

The number of instances of the set of elements to execute. If not specified, all instances will be drawn.
Returns:
Type Description
this

reset () void

ts:139

Reset and unbind any active VAO and geometry.

updateBuffers () void

ts:145

Update buffers of the currently bound geometry.

activateVao (geometry, program) void protected

ts:339

Activate vertex array object.

Name Type Description
geometry Geometry

Geometry instance.
program GlProgram

Shader program instance.

checkCompatibility (geometry, program) void protected

ts:160

Check compatibility between a geometry and a program

Name Type Description
geometry Geometry

Geometry instance.
program GlProgram

Program instance.

contextChange () void protected

ts:67

Sets up the renderer context and necessary buffers.

getSignature (geometry, program) string protected

ts:180

Takes a geometry and program and generates a unique signature for them.

Name Type Description
geometry Geometry

To get signature from.
program GlProgram

To test geometry against.
Returns:
Type Description
string
  • Unique signature of the geometry and program

initGeometryVao (geometry, program, _incRefCount) WebGLVertexArrayObject protected

ts:209

Creates or gets Vao with the same structure as the geometry and stores it on the geometry. If vao is created, it is bound automatically. We use a shader to infer what and how to set up the attribute locations.

Name Type Default Description
geometry Geometry

Instance of geometry to to generate Vao for.
program GlProgram
_incRefCount boolean true

Increment refCount of all geometry buffers.
Returns:
Type Description
WebGLVertexArrayObject

onGeometryDestroy (geometry, contextLost) void protected

ts:280

Disposes geometry.

Name Type Attributes Default Description
geometry Geometry

Geometry with buffers. Only VAO will be disposed
contextLost boolean <optional>
 false

If context was lost, we suppress deleteVertexArray

unbind () void protected

ts:474

Unbind/reset everything.