> falloffs

Texture Falloff

falloffs/texture-falloff·v1.5.1

IN:2 OUT:1

SUMMARY

Texture Falloff samples a TOP, from Input 1 or the Texture (TOP) parameter, at every point's P placed by the Texture page transform and optionally normalized to the points' bounds, or with Use Custom UVW at three lookup attributes. Lookup Channel picks what becomes the falloff: Luminance, a single channel, or the average or maximum of RGB or RGBA.

Input Extend Mode (Hold, Zero, Repeat, Mirror), Interpolate and Use Depth Offset for 3D textures control the lookup, so painted maps, procedural TOPs or video can drive the modifiers. Like every POPX falloff, it adds optional noise, Remap controls (clamp, fit, invert, ramp) and a Combine Operation with the falloff already on the points, and Preview Falloff colors the points by the result.

PARAMETERS

PAGETexture

Group	Group	If there are input groups, specifying a group name in this field will cause this POP to act only upon the group specified.
Texture (TOP)	Top	Sets the TOP the falloff is looked up from.
Use Custom UVW	Usecustomuvw	Enable sampling by custom attributes instead of the position.
[+]Lookup Index Attribute U	Lookupindexattr0	Attribute to use as the index for the U coordinate of the lookup.
[+]Lookup Index Attribute V	Lookupindexattr1	Attribute to use as the index for the V coordinate of the lookup. Used with Use Custom UVW.
[+]Lookup Index Attribute W	Lookupindexattr2	Attribute to use as the index for the W coordinate of the lookup.
Lookup Index Offset	Lookupindexoffset	Offset for the lookup index. Added to the UVW before sampling when Use Custom UVW is on.
[+]Lookup Index Units	Indexunit	Units for lookup index attribute. Only used when Use Custom UVW is on.
[+]Lookup Channel	Lookupchannel	Channel that becomes the falloff: Luminance, R, G, B, A, or the RGB or RGBA average or maximum.
Pixel Centered Sampling Location	Pixelcentered	Enable remapping the input to sample at pixel centers.
Cyclic Lookup	Cyclic	When enabled, the index wraps so the end connects back to the start, letting the full range map evenly across the cycle.
[+]Input Extend Mode	Inputextend	Determines what happens when the lookup index falls outside the texture.
Interpolate	Interpolate	When on, values are interpolated between samples. When off, the nearest sample is used.
Use Depth Offset	Usedepthoffset	Enable using the texture's depth offset for Texture 3D TOPs.
Normalize Sampling Position	Normalizesamplepos	Enable fitting the positions to 0-1 over the points' bounds before sampling.
[+]Translate	T	Translate the texture space in the three axes.
[+]Rotate	R	Rotate the texture space around the X, Y and Z axes. Angles are given in degrees.
[+]Scale	S	Scale factor for each axis of the texture space.
[+]Pivot	P	The pivot point for the rotate and scale of the texture space.
Uniform Scale	Scale	Specifies a uniform scale factor for the texture space.

PAGEFalloff

[+]Combine Operation	Combineop	Specify how to combine this falloff with the existing falloff value.
Combine Falloff Attribute	Combattrscope	Sets the existing falloff attribute to combine with.
Swap Operation Order	Swaporder	Swaps the order of the operands. A operation B is changed to B operation A.
Combine Strength	Combstrength	Sets the blend of the combine operation, from 0 to 1.
Output Falloff Attribute	Outputfalloffattr	Name of the attribute the falloff is written to.
Preview Falloff	Previewfalloff	Enable coloring the points by the falloff.
[+]Falloff Ramp	Fallofframp	Selects the color ramp of the preview.
Open Custom Ramp Editor	Opencustomrampeditor	Open the editor of the custom preview ramp.
Reset Custom Ramp	Resetcustomramp	Resets the custom preview ramp.

PAGENoise

Apply Noise	Applynoise	Enable adding noise to the falloff.
[+]Combine Operation	Combineopnoise	Specify how to combine the noise with the falloff, either Add or Multiply.
[+]Type	Type	Determines the noise type.
Seed	Seed	Numerical value that initializes the randomization.
Period	Period	Period (scale) of the noise field.
Harmonics	Harmon	The number of higher frequency components to layer on top of the base frequency. 0 harmonics give the base shape.
Harmonic Spread	Spread	The factor by which the frequency of a harmonic increases relative to the previous harmonic.
Harmonic Gain	Gain	Amplitude of the Harmonics layered on top of the base frequency.
Amplitude	Amp	The noise values amplitude (a scale on the values output).
Exponent	Exp	Sets the exponent. The internal value is raised by the power of the exponent.
Offset	Offset	Adds an offset to the resulting value.
[+]Transform Order	Xordnoise	Sets the overall transform order for the transformations.
[+]Rotate Order	Rordnoise	Sets the order of the rotations within the overall transform order.
[+]Translate	Tnoise	Translate the points through the noise space.
[+]Rotate	Rnoise	Rotate the points around the corresponding X, Y and Z axes. Angles are given in degrees.
[+]Scale	Snoise	These three fields scale the Source geometry in the three axes.
[+]Pivot	Pnoise	The pivot point for the transform rotates and scales.
Translate 4D	T4dnoise	Translates the points through the 4th noise dimension.

PAGERemap

Enable Remap	Remap	Enable the remap controls.
Clamp	Clamp	Clamps the falloff values to the 0-1 range.
Fit	Fit	Enable fitting the values from the input range to the output range.
Auto Input Min Max	Auto	When on, the actual minimum and maximum values are used as the input range.
Input Min	Inputmin	Sets the minimum of the input range.
Input Max	Inputmax	Sets the maximum of the input range.
Output Min	Outputmin	Sets the minimum of the output range.
Output Max	Outputmax	Sets the maximum of the output range.
Invert	Invert	Invert the falloff, outputting 1 minus the value.
Enable Ramp Remap	Enablerampremap	Enable remapping the falloff through a ramp.
Open Ramp Editor	Openrampeditor	Opens the remap ramp editor.
Reset Ramp	Resetramp	Resets the remap ramp.
Custom Ramp TOP	Customramptop	Reference to a TOP used as the remap ramp, overriding the ramp editor.

PAGECommon

Bypass	Bypass	Pass through the first input to the output unchanged.
Free Extra GPU Memory	Freeextragpumem	Free memory that has accumulated when output memory has grown and shrunk.
Render Primitives	Renderprimitives	Whether to render the full POPX geometry. When off, only point instances are drawn.
Convert to Point Primitives	Converttoptprim	Enable converting points to point primitives when Render Primitives is off.
SRT / RST	Srtrst	Sets the transform order, SRT or RST, used when the points are rendered as TouchDesigner instances.

INPUTS

Input 0 POP - POPX/POP Geometry

Input 1 TOP - Texture 

OUTPUTS

Output 0 POP - POPX/POP Geometry