SoFramebufferRenderer

InventorModule

genre	Visualization
author	MeVis Medical Solutions AG
package	MeVisLab/Standard
dll	SoRenderers
definition	SoRenderers.def
keywords	fbo, offscreen

Purpose

The module SoFramebufferRenderer reduces the fill rate required to render a given scene.

It renders the scene to a texture whose size is a fracture of the current viewport size. This texture is then applied to a rectangle of viewport size. The aspect ratio of the rectangle is equivalent to the aspect ratio of the viewport.

Details

The module uses the OpenGL GL_EXT_framebuffer_object extension which must be supported for the module to operate. The texture size is chosen to be the next power of two in size given the scale value.

Windows

Default Panel

Input Fields

child

name: child, type: SoNode

Output Fields

self

name: self, type: SoNode

Parameter Fields

Field Index

Apply Complexity Value: Float	Scale Factor: Float
boundingBoxCaching: Enum	Static Scale Factor: Float
Color Buffer Format: Enum	Tile Size: Integer
debugTiling: Bool	Use depth buffer: Bool
Is supported: Bool	Use stencil buffer: Bool
pickCulling: Enum
renderCaching: Enum
renderCulling: Enum

Visible Fields

Is supported

name: supported, type: Bool, persistent: no

Shows if framebuffer objects are supported by the graphics card driver.

Scale Factor

name: scaleFactor, type: Float, default: 0.5

Sets a scale factor for the computation of the target size by mulitplying it to the width and to the height.

Static Scale Factor

name: staticScaleFactor, type: Float, default: 1

Sets a fixed scale factor that is always applied.

Apply Complexity Value

name: complexity, type: Float, default: 0.5, minimum: 0, maximum: 1

Sets the complexity value to the traversal state while ignoring its override state.

Color Buffer Format

name: colorBufferFormat, type: Enum, default: RGBA

Defines the internal color frame buffer (texture) format.

Values:

Title	Name
Rgb	RGB
Rgb8	RGB8
Rgb16	RGB16
Rgb16f	RGB16F
Rgb32f	RGB32F
Rgba	RGBA
Rgba8	RGBA8
Rgba16	RGBA16
Rgba16f	RGBA16F
Rgba32f	RGBA32F

Use depth buffer

name: depthBuffer, type: Bool, default: TRUE

If checked, the a frame buffer for depth values is used.

Use stencil buffer

name: stencilBuffer, type: Bool, default: FALSE

If checked, the a frame buffer for stencil values is used.

Tile Size

name: tileSize, type: Integer, default: 1024

Sets the size of tiles.

Needs to be a power of 2.

Hidden Fields

renderCaching

name: renderCaching, type: Enum, default: AUTO

Values:

Title	Name
On	ON
Off	OFF
Auto	AUTO

boundingBoxCaching

name: boundingBoxCaching, type: Enum, default: AUTO

Values:

Title	Name
On	ON
Off	OFF
Auto	AUTO

renderCulling

name: renderCulling, type: Enum, default: AUTO

Values:

Title	Name
On	ON
Off	OFF
Auto	AUTO

pickCulling

name: pickCulling, type: Enum, default: AUTO

Values:

Title	Name
On	ON
Off	OFF
Auto	AUTO

debugTiling

name: debugTiling, type: Bool, default: FALSE