Composite TOP

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Summary
[edit]

The Composite TOP is a multi-input TOP that will perform a composite operation for each input. Select the composite operation using the Operation parameter on the Composite parameter page.

Note: See also the blendModes component in the Palette.

( some examples: File:Composite TOP.tox. These and more are found in OP Snippets. )

PythonIcon.pngcompositeTOP_Class


Parameters - Composite Page

TOP top - In addition to all the inputs attached, you can specify more using the TOPs listed in this field. Example: ramp* will composite all TOPs whose name starts with ramp.

Texture Sampling Parameters

Preview Grid previewgrid - This outputs an image showing the effect of all operation types in a grid, with the inputs swapped on the right side of each tile.

Select Input selectinput - Instead of doing the composites, this causes only one of the inputs to pass through.

Input Index inputindex - When passing through an input with Select Input on, this is the index of the image that is passed through.

Operation operand - - Choose which composite operation is performed from this menu. Search the web for 'blend modes' for more detailed information on the effects of each type.

  • Add add - input1.rgba + input2.rgba
  • Atop atop - (input1.rgba * input2.a) + (input2.rgba * (1.0 - input1.a))
  • Average average - (input1.rgba + input2.rgba)/2
  • Brightest brightest -
  • Burn Color burncolor -
  • Burn Linear burnlinear -
  • Chroma Difference chromadifference -
  • Color color -
  • Darker Color darkercolor -
  • Difference difference - absoluteValue(input1.rgb - input2.rgb). Alpha always equals 1.0
  • Dimmest dimmest -
  • Divide divide - input1.rgba / input2.rgba
  • Dodge dodge -
  • Exclude exclude -
  • Freeze freeze -
  • Glow glow -
  • Hard Light hardlight -
  • Hard Mix hardmix -
  • Heat heat -
  • Hue hue -
  • Inside inside - input1.rgba * clamp(input2.a, 0.0, 1.0)
  • Inside Luminance insideluminance -
  • Inverse inverse -
  • Lighter Color lightercolor -
  • Luminance Difference luminancedifference -
  • Maximum maximum - max(input1.r, input2.r), max(input1.g, input2.g), max(input1.b, input2.b), max(input1.a, input2.a)
  • Minimum minimum - min(input1.r, input2.r), min(input1.g, input2.g), min(input1.b, input2.b), min(input1.a, input2.a)
  • Multiply multiply -
  • Negate negate -
  • Outside outside - input1.rgba * (1.0 - input2.a)
  • Outside Luminance outsideluminance -
  • Over over - (input2.rgba * (1.0 - input1.a)) + input1.rgba
  • Overlay overlay -
  • Pinlight pinlight -
  • Reflect reflect -
  • Screen screen - 1.0 - ((1.0 - input1.rgba) * (1.0 - input2.rgba))
  • Soft Light softlight -
  • Linear Light linearlight -
  • Stencil Luminance stencilluminance -
  • Subtract subtract - input1.rgba - input2.rgba
  • Subtractive subtractive -
  • Under under - (input1.rgba * (1.0 - input2.a)) + input2.rgba
  • Vivid Light vividlight -
  • Xor xor - (input1.rgba * (1.0 - input2.a)) + (input2.rgba * (1.0 - input1.a))
  • Y Film yfilm -
  • Z Film zfilm -

Swap Operation Order swaporder - Swaps the order of the input pairs. A operation B is changed to B operation A. Operations like Add don't matter, but many do, like Over and Hard Light.


Parameters - Transform Page

Fixed Layer size - -

  • Input 1 input1 -
  • Input 2 input2 -

Pre-Fit Overlay prefit - -

  • Fill fill -
  • Fit Horizontal fithorz -
  • Fit Vertical fitvert -
  • Fit Best fitbest -
  • Fit Outside fitoutside -
  • Native Resolution nativeres -

Justify Horizontal justifyh - -

  • Left left -
  • Center center -
  • Right right -

Justify Vertical justifyv - -

  • Bottom bottom -
  • Center center -
  • Top top -

Extend Overlay extend - -

  • Hold hold -
  • Zero zero -
  • Repeat repeat -
  • Mirror mirror -

Rotate r -

Translate t- -

X tx -


Y ty -

Translate Units tunit - -

Scale s- -

X sx -


Y sy -

Pivot p- -

X px -


Y py -

Pivot Units punit - -

Translate Step tstep- -

X tstepx -


Y tstepy -

Translate Step Units tstepunit - -


Parameters - Common Page

Output Resolution outputresolution - - quickly change the resolution of the TOP's data.

  • Use Input useinput - Uses the input's resolution.
  • Eighth eighth - Multiply the input's resolution by that amount.
  • Quarter quarter - Multiply the input's resolution by that amount.
  • Half half - Multiply the input's resolution by that amount.
  • 2X 2x - Multiply the input's resolution by that amount.
  • 4X 4x - Multiply the input's resolution by that amount.
  • 8X 8x - Multiply the input's resolution by that amount.
  • Fit Resolution fit - Multiply the input's resolution by that amount.
  • Limit Resolution limit - Multiply the input's resolution by that amount.
  • Custom Resolution custom - Enables the Resolution parameter below, giving direct control over width and height.

Resolution resolution - Enabled only when the Resolution parameter is set to Custom Resolution. Some Generators like Constant and Ramp do not use inputs and only use this field to determine their size. The drop down menu on the right provides some commonly used resolutions.

Resolution Menu resmenu -

Use Global Res Multiplier resmult - Uses the Global Resolution Multiplier found in Edit>Preferences>TOPs. This multiplies all the TOPs resolutions by the set amount. This is handy when working on computers with different hardware specifications. If a project is designed on a desktop workstation with lots of graphics memory, a user on a laptop with only 64MB VRAM can set the Global Resolution Multiplier to a value of half or quarter so it runs at an acceptable speed. By checking this checkbox on, this TOP is affected by the global multiplier.

Output Aspect outputaspect - - Sets the image aspect ratio allowing any textures to be viewed in any size. Watch for unexpected results when compositing TOPs with different aspect ratios. (You can define images with non-square pixels using xres, yres, aspectx, aspecty where xres/yres != aspectx/aspecty.)

  • Use Input useinput - Uses the input's aspect ratio.
  • Resolution resolution - Uses the aspect of the image's defined resolution (ie 512x256 would be 2:1), whereby each pixel is square.
  • Custom Aspect custom - Lets you explicitly define a custom aspect ratio in the Aspect parameter below.

Aspect aspect- - Use when Output Aspect parameter is set to Custom Aspect.

Aspect1 aspect1 -


Aspect2 aspect2 -

Aspect Menu armenu -

Input Smoothness inputfiltertype - - This controls pixel filtering on the input image of the TOP.

  • Nearest Pixel nearest - Uses nearest pixel or accurate image representation. Images will look jaggy when viewing at any zoom level other than Native Resolution.
  • Interpolate Pixels linear - Uses linear filtering between pixels. This is how you get TOP images in viewers to look good at various zoom levels, especially useful when using any Fill Viewer setting other than Native Resolution.
  • Mipmap Pixels mipmap - Uses mipmap filtering when scaling images. This can be used to reduce artifacts and sparkling in moving/scaling images that have lots of detail.

Fill Viewer fillmode - - Determine how the TOP image is displayed in the viewer. NOTE:To get an understanding of how TOPs work with images, you will want to set this to Native Resolution as you lay down TOPs when starting out. This will let you see what is actually happening without any automatic viewer resizing.

  • Use Input useinput - Uses the same Fill Viewer settings as it's input.
  • Fill fill - Stretches the image to fit the edges of the viewer.
  • Fit Horizontal width - Stretches image to fit viewer horizontally.
  • Fit Vertical height - Stretches image to fit viewer vertically.
  • Fit Best best - Stretches or squashes image so no part of image is cropped.
  • Fit Outside outside - Stretches or squashes image so image fills viewer while constraining it's proportions. This often leads to part of image getting cropped by viewer.
  • Native Resolution nativeres - Displays the native resolution of the image in the viewer.

Viewer Smoothness filtertype - - This controls pixel filtering in the viewers.

  • Nearest Pixel nearest - Uses nearest pixel or accurate image representation. Images will look jaggy when viewing at any zoom level other than Native Resolution.
  • Interpolate Pixels linear - Uses linear filtering between pixels. Use this to get TOP images in viewers to look good at various zoom levels, especially useful when using any Fill Viewer setting other than Native Resolution.
  • Mipmap Pixels mipmap - Uses mipmap filtering when scaling images. This can be used to reduce artifacts and sparkling in moving/scaling images that have lots of detail.

Passes npasses - Duplicates the operation of the TOP the specified number of times. Making this larger than 1 is essentially the same as taking the output from each pass, and passing it into the first input of the node and repeating the process. Other inputs and parameters remain the same for each pass.

Channel Mask chanmask - Allows you to choose which channels (R, G, B, or A) the TOP will operate on. All channels are selected by default.

Pixel Format format - - Format used to store data for each channel in the image (ie. R, G, B, and A). Refer to Pixel Formats for more information.

  • Use Input useinput - Uses the input's pixel format.
  • 8-bit fixed (RGBA) rgba8fixed - Uses 8-bit integer values for each channel.
  • sRGB 8-bit fixed (RGBA) srgba8fixed - Uses 8-bit integer values for each channel and stores color in sRGB colorspace.
  • 16-bit float (RGBA) rgba16float - Uses 16-bits per color channel, 64-bits per pixel.
  • 32-bit float (RGBA) rgba32float - Uses 32-bits per color channel, 128-bits per pixels.
  • 10-bit RGB, 2-bit Alpha, fixed (RGBA) rgb10a2fixed - Uses 10-bits per color channel and 2-bits for alpha, 32-bits total per pixel.
  • 16-bit fixed (RGBA) rgba16fixed - Uses 16-bits per color channel, 64-bits total per pixel.
  • 11-bit float (RGB), Positive Values Only rgba11float - A RGB floating point format that has 11 bits for the Red and Green channels, and 10-bits for the Blue Channel, 32-bits total per pixel (therefore the same memory usage as 8-bit RGBA). The Alpha channel in this format will always be 1. Values can go above one, but can't be negative. ie. the range is [0, infinite).
  • 16-bit float (RGB) rgb16float -
  • 32-bit float (RGB) rgb32float -
  • 8-bit fixed (Mono) mono8fixed - Single channel, where RGB will all have the same value, and Alpha will be 1.0. 8-bits per pixel.
  • 16-bit fixed (Mono) mono16fixed - Single channel, where RGB will all have the same value, and Alpha will be 1.0. 16-bits per pixel.
  • 16-bit float (Mono) mono16float - Single channel, where RGB will all have the same value, and Alpha will be 1.0. 16-bits per pixel.
  • 32-bit float (Mono) mono32float - Single channel, where RGB will all have the same value, and Alpha will be 1.0. 32-bits per pixel.
  • 8-bit fixed (RG) rg8fixed - A 2 channel format, R and G have values, while B is 0 always and Alpha is 1.0. 8-bits per channel, 16-bits total per pixel.
  • 16-bit fixed (RG) rg16fixed - A 2 channel format, R and G have values, while B is 0 always and Alpha is 1.0. 16-bits per channel, 32-bits total per pixel.
  • 16-bit float (RG) rg16float - A 2 channel format, R and G have values, while B is 0 always and Alpha is 1.0. 16-bits per channel, 32-bits total per pixel.
  • 32-bit float (RG) rg32float - A 2 channel format, R and G have values, while B is 0 always and Alpha is 1.0. 32-bits per channel, 64-bits total per pixel.
  • 8-bit fixed (A) a8fixed - An Alpha only format that has 8-bits per channel, 8-bits per pixel.
  • 16-bit fixed (A) a16fixed - An Alpha only format that has 16-bits per channel, 16-bits per pixel.
  • 16-bit float (A) a16float - An Alpha only format that has 16-bits per channel, 16-bits per pixel.
  • 32-bit float (A) a32float - An Alpha only format that has 32-bits per channel, 32-bits per pixel.
  • 8-bit fixed (Mono+Alpha) monoalpha8fixed - A 2 channel format, one value for RGB and one value for Alpha. 8-bits per channel, 16-bits per pixel.
  • 16-bit fixed (Mono+Alpha) monoalpha16fixed - A 2 channel format, one value for RGB and one value for Alpha. 16-bits per channel, 32-bits per pixel.
  • 16-bit float (Mono+Alpha) monoalpha16float - A 2 channel format, one value for RGB and one value for Alpha. 16-bits per channel, 32-bits per pixel.
  • 32-bit float (Mono+Alpha) monoalpha32float - A 2 channel format, one value for RGB and one value for Alpha. 32-bits per channel, 64-bits per pixel.


TOPs
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An that creates, composites and modifies images, and reads/writes images and movies to/from files and the network. TOPs run on the graphics card's GPU.

A built-in panel in TouchDesigner that contains a library of components and media that can be dragged-dropped into a TouchDesigner network.

The width and height of an image in pixels. Most TOPs, like the can set the image resolution. See for the width/height ratio of an image, taking into account non-square pixels.

The viewer of a node can be (1) the interior of a node (the ), (2) a floating window (RMB->View... on node), or (3) a that graphically shows the results of an operator.

A outputs one or more channels, where a channel is simply a sequence of numbers, representing motion, audio, etc. Channels are passed between CHOPs in TouchDesigner networks. See also .