OrderIndependentTranslucentPass

Source (.js)Source (.d.ts)

Methods

createCopyShader

Build the shader program that resolves the two accumulation buffers onto a screen-aligned quad.

Argument	Type	Required	Description
viewNode	vtkOpenGLRenderWindow	Yes	The render window view node.

createFramebuffer

Allocate the offscreen framebuffer the translucent geometry accumulates into, along with its RGBA, R and depth attachments.

Argument	Type	Required	Description
viewNode	vtkOpenGLRenderWindow	Yes	The render window view node.

createVBO

Build the vertex array object binding the quad vertex buffer to the copy shader.

Argument	Type	Required	Description
viewNode	vtkOpenGLRenderWindow	Yes	The render window view node.

createVertexBuffer

Build the vertex buffer of the screen-aligned quad the resolved color is drawn to.

extend

Method used to decorate a given object (publicAPI+model) with vtkOpenGLOrderIndependentTranslucentPass characteristics.

Argument	Type	Required	Description
publicAPI		Yes	object on which methods will be bounds (public)
model		Yes	object on which data structure will be bounds (protected)
initialValues	IOrderIndependentTranslucentPassInitialValues	No	(default: {})

getFramebuffer

Get the framebuffer the translucent geometry accumulates into, or null before the first traversal.

getShaderReplacement

Get the shader replacement that turns a mapper's fragment output into the weighted-blended accumulation this pass resolves, or null when the context lacks the float color buffer support the pass needs.

newInstance

Method used to create a new instance of vtkOpenGLOrderIndependentTranslucentPass.

Argument	Type	Required	Description
initialValues	IOrderIndependentTranslucentPassInitialValues	No	for pre-setting some of its content

releaseGraphicsResources

Release the framebuffer, its textures, the copy shader and its vertex array object.

Argument	Type	Required	Description
viewNode	vtkOpenGLRenderWindow	Yes	The render window view node.

traverse

Render the translucent actors of a renderer with order-independent transparency, then resolve the accumulation buffers onto the current framebuffer. Falls back to plain alpha blending when the context has no float color buffer extension or a hardware selector is active.

Argument	Type	Required	Description
viewNode	vtkOpenGLRenderWindow	Yes	The render window view node.
renNode	vtkViewNode	Yes	The renderer view node to traverse.
forwardPass	vtkForwardPass	Yes	The forward pass driving this pass.