Sunday, February 24, 2013

houdini


Point Cloud Open

This node opens a point cloud file and searches for points around a source position.

Point Cloud Filter

This node filters the points queried by pcopen.
This node filters points queried by pcopen to produce an averaged result. The pcfilter VOP invokes the underlying pcfilter VEX function.
pcfilter takes the points that were opened by the point cloud and produces a filtered value. The following equation shows how the individual points are weighted.
w_i = 1-smooth(0, maxd*1.1, d_i);
maxd is the farthest point, and w_i is the weight for a given point at distance (d_i). Points that are closer to the center will be weighted higher with that formula, rather than it being an average.

Inputs

handle The point cloud handle to be used for filtering.
channel The channel name to be filtered.

Outputs

The filtered value. The pcfilter VOP will filter using a smooth falloff with distance from the lookup point. 


Multiply

Outputs the product of its inputs.
This operator outputs the product of its inputs.
The first input can be an integer, float, vector, vector4, matrix3, or matrix. The allowed data types of subsequent inputs depend on the data type of the first input. For example, if the first input is a float, subsequent inputs can be either floats or integers. The output data type is always the same as the data type for the first input.


Fit Range


Takes the value in the source range and shifts it to the corresponding value in the destination range.
This operator takes the value in the source range (srcmin, srcmax) and shifts it to the corresponding value in the destination range (destmin, destmax). For example, fit(.3, 0, 1, 10, 20) would return the value 13.
Values outside the input range will be clamped to the input range.

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