On this page |
This output operator is used to write an MDD animation file based on point locations in a particular geometry. The number of points in the geometry must not change, and the frame range must monotonically increase.
Parameters ¶
Save to Disk
Begins the render with the last render control settings.
Controls
Opens the Render Control window, which allows you to adjust the render parameters before rendering.
Render with Take
Uses the settings in a particular take while rendering. Choose Current to use the current take when rendering.
Valid Frame Range
Controls whether this render node outputs the current frame or the image sequence specified in the Start/End/Inc parameters.
Render Current Frame
Export only the current frame.
Render Frame Range
Export the frames in the Start/End/Inc frame range, but also allow exporting of frames referenced by in-range frames.
Render Frame Range Only (Strict)
Only export the frames in the Start/End/Inc frame range. Do not allow exporting of other frames, including frames referenced by in-range frames.
SOP Path
The SOP node which contains the points used to write the file.
Output File
Name of the MDD file to write.
Rest Frame
Specifies the frame at which to cook the rest geometry.
Transform
Specifies whether the geometry should be transformed into world space before written out.
Scale
Specifies a scale on the geometry before written out.
Coordinate System
The coordinate system used in the MDD file. If this is set to Right-Handed, z coordinates will be negated upon writing from Houdini’s native left-handed coordinate system.
Relative Time Values
If set, time values will be written out relative to the starting frame.
Tip
To import an MDD file that was saved with this option enabled, the
Frame parameter of the MDD surface node should use the
expression $FF+1-
start frame instead of $FF
. For sequences
starting at frame 1 though, this is not necessary.
Create Intermediate Directories
When turned on, creates intermediate parent directories for output files as needed. Currently only applies to generated scripts, images, and shadow maps.
Initialize Simulation OPs
Force all simulation OPs to be reset. This includes DOP Networks, POP SOPs, and other OPs that cache their results.
This is the safest way to render out a simulation, because it starts the simulation from scratch and discards any partial simulations you might have done with different parameters.
Locals ¶
N
The current frame of the range specified. This always starts at 1.
NRENDER
Total number of frames being rendered.
Examples ¶
This example demonstrates how to use the MDD SOP and MDD File Writer ROP.
See also |