SoGVRShaderParameterDirection

InventorModule

status	stable
author	Florian Link
package	MeVisLab/Standard
dll	SoGVR
definition	SoGVRShaderPipeline.def
see also	SoGVRVolumeRenderer
keywords	GVR, shader, pipeline

Purpose

The SoGVRShaderParameterDirection module adds a plane shader parameter (aka uniform) to the scene. Planes are transformed using the inverse-transposed of the transformation matrix to preserve their direction in non-uniform scaled transforms.

Usage

The direction is specified in either world or eye (aka camera) coordinates. It is available in the GVR shader and can be used in any SoGVRShaderFunction.

The parameter is available in various coordinate systems, which are appended as suffixes to its Name.

suffix	coordinate system
_eye	eye/camera coordinates
_world	world coordinates
_voxel	voxel coordinates
_scaledVoxel	scaled voxel coordinates (voxel coordinates multiplied by voxel size)

Windows

Default Panel

Output Fields

self

name: self, type: SoNode

Place the output into any OpenInventor scene in front of a SoGVRVolumeRenderer.

Parameter Fields

Visible Fields

Coordinate System

name: coordinateSystem, type: Enum, default: WorldCoordinates

Defines the source coordinate system in which the Plane is given.

Values:

Title	Name	Description
World Coordinates	WorldCoordinates	World coordinates
Eye Coordinates	EyeCoordinates	Eye/Camera coordinate system

Enabled

name: enabled, type: Bool, default: TRUE

Enables the module.

Name

name: name, type: String

Defines the base name of the parameter in the shader, it becomes available in the SoGVRShaderFunction via name_eye, name_world, name_voxel and name_scaledVoxel.

Plane

name: plane, type: Plane, default: 1 0 0 0

Specifies the plane.