The Real Flow SD File Export SOP (Surface Operator) will export Houdini geometry to Real Flow SD (Scene Description) files including animated objects. You have the choice to export a static model (not animated) or animated over a range of frames. You can also export any set of points from Houdini as Real Flow particle BIN files. All attributes (if present) in the geometry will be written to the file. (The emitters transformation parameters are in the GUI at the "object level").

Example #1: "Vessel" (coming soon)
An example that demonstrates creating a NURBs model in Houdini, exporting the geometry into Real Flow, then create a simple flowing fluid and make it swirl through the geometry.

The Real Flow SD File Export SOP Interface:

Setup Page Parameters:
• File Name: The name of the Real Flow SD file to save.
• SD/BIN File: Select the file you wish to export, Real Flow particle files (BIN), or scene files (SD)
• Animated: If checked, the exported Real Flow SD file will contain animation information for the exported geometry over the desired range of frames as set in the "Start/End" fields.
• Start/End: The beginning and end frames
• Echo Data to Console (debug): If checked, the geometry being processed will be echoed to the system console for debugging purposes. This is helpful for determining if the incoming geometry is in fact triangular polygon geometry (be careful, for complex geometry, this can slow your computer for some time).
• Write Real Flow SD File: When pressed, the Real Flow SD file will be written to disk.

SD File Page Parameters:
• Object Name: The name of object when imported into Real Flow
• Texture File Name (not yet implemented): The file name of the texture file to include in the Real Flow SD file.
• Apply Object Transform: When checked, the transformations at the OBJ level will be applied to the geometry written to the SD file.

BIN File Page Parameters:
• Fluid Name: The name of the fluid to be exported to Real Flow
• Fluid Type: The type of fluid (Gas, Liquid A, Liquid B, Gen A, Gen B, Dumb, Elastics)
• Frames/Second: The animation frame rate (24, 25, 30 in fps)
• Pressure (Min, Max, Avg): The pressure attributes.
• Speed (Min, Max, Avg): The speed attributes.
• Temperature (Min, Max, Avg): The temperature attributes
• Emitter Position, Rotation, Scale: The emitter's position, rotation and scale.