Справка Houdini на русском Nodes Object nodes

VR Camera object node

Camera supporting VR image rendering.

This camera enables the rendering of VR images. There are a range of projection formats offering stereoscopic output for different devices.

Note

All VR-specific controls are located under the VR tab.

Parameters

Transform

Transform Order

The left menu chooses the order in which transforms are applied (for example, scale, then rotate, then translate). This can change the position and orientation of the object, in the same way that going a block and turning east takes you to a different place than turning east and then going a block.

The right menu chooses the order in which to rotate around the X, Y, and Z axes. Certain orders can make character joint transforms easier to use, depending on the character.

Translate

Translation along XYZ axes.

Rotate

Degrees rotation about XYZ axes.

Pivot

Local origin of the object. See also setting the pivot point .

Modify Pre-Transform

This menu contains options for manipulating the pre-transform values. The pre-transform is an internal transform that is applied prior to the regular transform parameters. This allows you to change the frame of reference for the translate, rotate, scale parameter values below without changing the overall transform.

Clean Transform

This reverts the translate, rotate, scale parameters to their default values while maintaining the same overall transform.

Clean Translates

This sets the translate parameter to (0, 0, 0) while maintaining the same overall transform.

Clean Rotates

This sets the rotate parameter to (0, 0, 0) while maintaining the same overall transform.

Clean Scales

This sets the scale parameter to (1, 1, 1) while maintaining the same overall transform.

Extract Pre-transform

This removes the pre-transform by setting the translate, rotate, and scale parameters in order to maintain the same overall transform. Note that if there were shears in the pre-transform, it can not be completely removed.

Reset Pre-transform

This completely removes the pre-transform without changing any parameters. This will change the overall transform of the object if there are any non-default values in the translate, rotate, and scale parameters.

Keep Position When Parenting

When the object is re-parented, maintain its current world position by changing the object’s transform parameters.

Child Compensation

When the object is being transformed, maintain the current world transforms of its children by changing their transform parameters.

Enable Constraints

Enable Constraints Network on the object.

Constraints

Path to a CHOP Constraints Network. See also creating constraints.

Tip

You can you use the Constraints drop down button to activate one of the Constraints Shelf Tool. If you do so, the first pick session is filled automatically by nodes selected in the parameter panel.

Note

Lookat and Follow Path parameters on object nodes are deprecated in favor of Look At and Follow Path constraints. The parameters are only hidden for now and you can set their visibitily if you do edit the node’s parameter interface.

Render

Display

Whether or not this object is displayed in the viewport and rendered. Turn on the checkbox to have Houdini use this parameter, then set the value to 0 to hide the object in the viewport and not render it, or 1 to show and render the object. If the checkbox is off, Houdini ignores the value.

Set Wireframe Color

Use the specified wireframe color

Wireframe Color

The display color of the object

Viewport Selecting Enabled

Object is capable of being picked in the viewport.

Select Script

Script to run when the object is picked in the viewport. See select scripts .

Cache Object Transform

Caches object transforms once Houdini calculates them. This is especially useful for objects whose world space position is expensive to calculate (such as Sticky objects), and objects at the end of long parenting chains (such as Bones). This option is turned on by default for Sticky and Bone objects.

See the OBJ Caching section of the Houdini Preferences window for how to control the size of the object transform cache.

View

Icon scale

Houdini render property
iconscale

Scales the viewport geometry. This parameter is only for display purposes.

Resolution

Houdini render property
res

The output resolution in pixels. Standard presets are available via the pull down menu to the right of the parameter.

Pixel aspect ratio

Houdini render property
aspect
IFD property
image:pixelaspect

The pixel aspect ratio of the output image.

Projection

Houdini render property
projection

Type of camera projection used for rendering (for example, perspective or orthographic).

Perspective

This simulates the classic pinhole camera where camera rays emanate from a common camera origin through a flat camera plane.

Orthographic

This uses parallel camera rays that are orthogonal to the (flat) camera plane. The width of the view volume is determined by the Ortho Width parameter below.

Polar (panoramic)

This projection uses a spherical camera plane for rendering.

Cylindrical (panoramic)

This projection uses a cylindrical camera plane for rendering.

Lens Shader: Use a lens shader to initialize rays for ray tracing.

Selecting Polar, Cylindrical or Lens Shader will automatically switch the Rendering Engine (on the output driver) to Ray Tracing, as it is impossible to render these projections with micropolygon rendering.

Focal length

Houdini render property
focal

Camera focal length (zoom).

Focal units

Houdini render property
focalunits

The units used for the focal length.

Aperture

Houdini render property
aperture

Width of the visible field.

Note

The correct aperture width for Super 35mm format motion picture film is 24.89.

Otho width

Houdini render property
orthowidth
IFD property
camera:orthowidth

Width of orthographic view volume when using Projection is set to Orthographic.

Near clipping

Houdini render property
near

Position of near clipping plane.

Far clipping

Houdini render property
far

Position of far clipping plane.

Screen window X/Y

Houdini render property
win

Define the center of the window during the rendering process.

Screen window size

Houdini render property
winsize

Scale for expanding the cropped area specified by the Crop parameters.

Screen window mask

Houdini render property
winmask

Sets the screen window mask to cover the bounding box of the selected object(s).

Left crop

Houdini render property
cropl

Left cropping margin for camera’s view area.

Right crop

Houdini render property
cropr

Right cropping margin for camera’s view area.

Bottom crop

Houdini render property
cropb

Bottom cropping margin for camera’s view area.

Top crop

Houdini render property
cropt

Top cropping margin for camera’s view area.

Crop Mask

Houdini render property
cropmask

Sets the pixel crop region to cover the bounding box of the selected object(s).

Note

You can optionally add the spare parameter Visible Objects from the Parameter Interface. This allows you to control which objects are displayed in the viewport when looking through the camera.

Sampling

Shutter time

Houdini render property
shutter

The portion of the frame interval that the camera shutter is open. Used to determine motion blur. [0,1]

Focus distance

Houdini render property
focus
IFD property
camera:focus

The lens focal distance and distance from the camera at which objects will be in focus. This is only used when rendering using depth of field. Objects outside this distance will be blurred.

F-stop

Houdini render property
fstop
IFD property
camera:fstop

Lens fstop. This is only used when rendering using depth of field. Determines blurriness of depth of field effects.

Bokeh

Houdini render property
vm_bokeh
IFD property
camera:bokeh

Filter kernel used in depth of field rendering. Use the pop-up menu to the right of the text box to choose from the available options.

Radial bokeh (radial)

Use a gaussian filter kernel (highest quality).

Image file bokeh (file)

Use an image file

Box filter bokeh (box)

Use a box filter kernal.

Disable bokeh (null)

Do not filter.

Bokeh image file

Houdini render property
vm_bokehfile
IFD property
camera:bokeh

The file to use for "file" shaped bokeh. White/black cutout images that delineate the shape of the lens are good candidates, where white regions represent the areas that light passes through.

Bokeh rotation

Houdini render property
vm_bokehrotation
IFD property
camera:bokeh

The rotation for "file" shaped bokeh.

VR

Mode

Selects the layout of stereo pairs. Stereo outputs pairs side-by-side. Left Over/Right Under outputs pairs with left on top and right on bottom. Right Over/Left Under outputs pairs with right on top and left on bottom. Left Eye outputs only the left eye. Right Eye outputs only the right eye.

Projection

Selects the type of projection to use for stereo pairs. Latlong uses a spherical projection. Perspective uses a standard perspective projection. Cube Map - NVIDIA uses a cube format like the 'NVIDIA Texture Tools' utility. Cube Map - 3×2 uses a stacked cube format.

Preserve Aspect Ratio

Toggling this parameter will keep the camera’s image aspect ratio the same independent of the Projection type.

Merge Mode

The type of correction to apply at the poles of the projection. None disables correction. Linear blends the correction between Merge Angle and the poles. Smooth blends the correction using a smooth curve between Merge Angle and the poles.

Merge Angle

The angle (in degrees) from the poles beyond which correction is applied.

Field Of View

When Projection is set to Perspective this controls the field of view of the camera.

Near Clipping

When Projection is set to Perspective this controls the near clipping plane of the camera.

Far Clipping

When Projection is set to Perspective this controls the far clipping plane of the camera.

Distortion

When Projection is set to Perspective this controls the distortion of the lens. Positive values result in a "barrel" distortion effect. Negative values result in a "pin-cushion" distortion effect.

Cubic Distortion

When Projection is set to Perspective this controls the cubic coefficient of the lens distortion.

Eye Separation

Determines the distance between left and right eyes, or "interpupillary distance" (IPD), of the viewer. This should be set according to the scale of your scene. The default value is set based on average human metrics in meters.

Eye To Neck Distance

Determines the distance from the eyes to the neck of the viewer. The camera will be offset in Y along this distance, and if rotated will pivot from the base of the neck, not the eye-nodal point. This should be set according to the scale of your scene. The default value is set based on average human metrics in meters.

See also

Object nodes

  • Agent Cam

    Create and attach camera to a crowd agent.

  • Alembic Archive

    Loads the objects from an Alembic scene archive (.abc) file into the object level.

  • Alembic Xform

    Loads only the transform from an object or objects in an Alembic scene archive (.abc).

  • Ambient Light

    Adds a constant level of light to every surface in the scene (or in the light’s mask), coming from no specific direction.

  • Atmosphere

    Creates a fog effect when rendered.

  • Auto Bone Chain Interface

    The Auto Bone Chain Interface is created by the IK from Objects and IK from Bones tools on the Rigging shelf.

  • Blend

    Switches or blends between the transformations of several input objects.

  • Blend Sticky

    Computes its transform by blending between the transforms of two or more sticky objects, allowing you to blend a position across a polygonal surface.

  • Bone

    The Bone Object is used to create hierarchies of limb-like objects that form part of a hierarchy …

  • COP2 Plane

    Container for the Compositing operators (COP2) that define a picture.

  • Camera

    You can view your scene through a camera, and render from its point of view.

  • Dop Network

    The DOP Network Object contains a dynamic simulation.

  • Environment Light

    Environment Lights provide background illumination from outside the scene.

  • Extract Transform

    The Extract Transform Object gets its transform by comparing the points of two pieces of geometry.

  • Fetch

    The Fetch Object gets its transform by copying the transform of another object.

  • Formation Crowd Example

    Crowd example showing a changing formation setup

  • Franken Muscle

    Creates a custom muscle by combining any number of geometry objects, muscle rigs, and muscle pins.

  • Fuzzy Logic Obstacle Avoidance Example

  • Fuzzy Logic State Transition Example

  • Geometry

    Container for the geometry operators (SOPs) that define a modeled object.

  • Groom Merge

    Объединяет данные груминга нескольких объектов в один поток.

  • Guide Deform

    Смещает кривые груминга в соответствии с анимированной геометрией кожи (skin).

  • Guide Groom

    Генерирует направляющие кривые на геометрии кожи и выполняет дальнейшую обработку с использованием редактируемой сети SOP, содержащейся в ноде.

  • Guide Simulate

    Выполняет физическую симуляцию направляющих.

  • Hair Generate

    Генерирует волосы из направляющих кривых и геометрии кожи.

  • Handle

    The Handle Object is an IK tool for manipulating bones.

  • Indirect Light

    Indirect lights produce illumination that has reflected from other objects in the scene.

  • Instance

    Instance Objects can instance other geometry, light, or even subnetworks of objects.

  • Light

    Light Objects cast light on other objects in a scene.

  • Light template

    A very limited light object without any built-in render properties. Use this only if you want to build completely custom light with your choice of properties.

  • Microphone

    The Microphone object specifies a listening point for the SpatialAudio CHOP.

  • Mocap Acclaim

    Import Acclaim motion capture.

  • Mocap Biped 1

    A male character with motion captured animations.

  • Mocap Biped 2

    A male character with motion captured animations.

  • Mocap Biped 3

    A male character with motion captured animations.

  • Muscle

    The Muscle object is a versatile tool that can be used when rigging characters and creatures with musculature.

  • Muscle Pin

    Creates a simple rigging component for attaching regions of a Franken Muscle to your character rig.

  • Muscle Rig

    Creates the internal components of a muscle (the rig), by stroking a curve onto a skin object.

  • Null

    Serves as a place-holder in the scene, usually for parenting. this object does not render.

  • Path

    The Path object creates an oriented curve (path)

  • PathCV

    The PathCV object creates control vertices used by the Path object.

  • Pxr AOV Light

    Pxr AOV Light object for RenderMan RIS.

  • Pxr Barn Light Filter

    Pxr Barn Light Filter object for RenderMan RIS.

  • Pxr Blocker Light Filter

    Pxr Blocker Light Filter object for RenderMan RIS.

  • Pxr Cookie Light Filter

    Pxr Cookie Light Filter object for RenderMan RIS.

  • Pxr Day Light

    Pxr Day Light object for RenderMan RIS.

  • Pxr Disk Light

    Pxr Disk Light object for RenderMan RIS.

  • Pxr Distant Light

    Pxr Distant Light object for RenderMan RIS.

  • Pxr Dome Light

    Pxr Dome Light object for RenderMan RIS.

  • Pxr Gobo Light Filter

    Pxr Gobo Light Filter object for RenderMan RIS.

  • Pxr Mesh Light

    Pxr Mesh Light object for RenderMan RIS.

  • Pxr Portal Light

    Pxr Portal Light object for RenderMan RIS.

  • Pxr Ramp Light Filter

    Pxr Ramp Light Filter object for RenderMan RIS.

  • Pxr Rectangle Light

    Pxr Rectangle Light object for RenderMan RIS.

  • Pxr Rod Light Filter

    Pxr Rod Light Filter object for RenderMan RIS.

  • Pxr Sphere Light

    Pxr Sphere Light object for RenderMan RIS.

  • Pxr Standard Area Light

    Pxr Standard Area Light object for RenderMan RIS.

  • Pxr Standard Environment Day Light

    Pxr Standard Environment Day Light object for RenderMan RIS.

  • Pxr Standard Environment Map Light

    Pxr Standard Environment Map Light object for RenderMan RIS.

  • Python Script

    The Python Script object is a container for the geometry operators (SOPs) that define a modeled object.

  • Ragdoll Run Example

    Crowd example showing a simple ragdoll setup.

  • Rivet

    Creates a rivet on an objects surface, usually for parenting.

  • Simple Biped

    A simple and efficient animation rig with full controls.

  • Simple Female

    A simple and efficient female character animation rig with full controls.

  • Simple Male

    A simple and efficient male character animation rig with full controls.

  • Sound

    The Sound object defines a sound emission point for the Spatial Audio chop.

  • Stereo Camera Rig

    Provides parameters to manipulate the interaxial lens distance as well as the zero parallax setting plane in the scene.

  • Stereo Camera Template

    Serves as a basis for constructing a more functional stereo camera rig as a digital asset.

  • Sticky

    Creates a sticky object based on the UV’s of a surface, usually for parenting.

  • Subnet

    Container for objects.

  • Switcher

    Acts as a camera but switches between the views from other cameras.

  • Tissue Solver

    Collects muscles, anatomical bone models, and skin objects and places them into a single dynamics simulation.

  • VR Camera

    Camera supporting VR image rendering.

  • Viewport Isolator

    A Python Script HDA providing per viewport isolation controls from selection.

  • pxr Int Mult Light Filter

    pxr Int Mult Light Filter object for RenderMan RIS.