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Section

Value Expression

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valueExpression
valueExpression

UI Text Box
sizemedium
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The Value Expression is the lowest level operator. It expects no sub-expressions but can be converted to a Math Expression by selecting it with the right mouse button in the Conditions Tree.

The Value Expression returns a raw number which can be either the value of a Grid Channel or a Texture for a given cell of the Phoenix FD Simulator, a manually-specified number in a certain range or the distance between a given cell and an object in the scene.



Number [ 1 ] | val_type, val_number – returns the specified value.

Random Between [ 0 - 1 ] | val_type, val_rand_min, val_rand_max – returns a random number in the selected range. Note: a different value is generated for each cell of the Simulator. The value also changes for every frame.

Channel [ Temperature ] | val_type, val_chan_grid – returns the value of the specified Simulator Grid Channel for the current cell. You must have this grid channel enabled in the Output rollout of your Simulator. The Channel can be one of: [ Temperature ], [ Smoke ], [ Fuel ], [ Speed ], [ Velocity X ], [ Velocity Y ], [ Velocity Z ], [ RGB Red ], [ RGB Green ], [ RGB Blue ].

Distance To [ None ] | val_type, val_dist_node – returns the distance from the specified object's surface to the current cell. Note: this only works for polygon meshes. Particle systems are currently not supported.

Texture [ No Map ] | val_type, val_tex – returns  – returns the specified texture's value for color intensity in the position of the current cellvoxel. The Phoenix FD Simulator has no Explicit UV coordinates therefore the texture's Mapping should be set to Planar from Object XYZ for this to work.

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