Depth TOP

From Derivative
Jump to: navigation, search


Summary

The Depth TOP reads an image containing depth information from a scene described in a specified Render TOP. The resulting image is black (0) at pixels where the surface is at the near depth value (Camera's parameter "Near"). It is white (1) at pixels where the surface is at the far depth value (parameter "Far").

The Depth TOP is used to do shadow mapping. It can have many other uses also, such as edge detection based on depth.

The depth range is by definition the near plane -> far plane. Values in the Depth TOP will be 0 at the near plane, and 1 at the far plane. Generally the image in the Depth TOP will be white, unless you have your planes really tight around your object. But just because you can't visually see anything, it doesn't mean the information isn't there.

Another option is Linear Camera-Space Depth. If the Render TOP's Depth Buffer Format is set to 32-Bit Floating-Point and its Linear Camera-Space Depth parameter is on, then the Depth TOP will output linear camera space depth.

You can use the Level TOP to re-range the Depth TOP's values. However make sure you set the Pixel Format of the Level TOP to 16 or 32-bit, or you'll lose a lot of information from the Depth TOP's data (The Depth TOP has 24-bit data).

The Depth TOP creates a 24-bit fixed-point or 32-bit floating-point single channel image. When the Depth TOP is used as an input to another TOP, its data will be treated like an RGBA value of (D, D, D, 1). The same is true when sampling a depth texture in a GLSL shader.

PythonIcon.pngdepthTOP_Class


Parameters - Depth Page

Render TOP rendertop - Specifies the Render TOP used for depth values.

Camera Index cameraindex -

Peel Layer Index peellayerindex -

Pixel Format pixelformat - -

  • Depth Texture depth -
  • 8-bit fixed (RGBA) rgba8fixed -
  • 16-bit float (RGBA) rgba16float -
  • 32-bit float (RGBA) rgba32float -
  • 10-bit RGB, 2-bit Alpha, fixed (RGBA) rgb10a2fixed -
  • 16-bit fixed (RGBA) rgba16fixed -
  • 11-bit float (RGB), Positive Values Only rgb11 -
  • 8-bit fixed (R) r8fixed -
  • 16-bit fixed (R) r16fixed -
  • 16-bit float (R) r16float -
  • 32-bit float (R) r32float -
  • 8-bit fixed (RG) rg8fixed -
  • 16-bit fixed (RG) rg16fixed -
  • 16-bit float (RG) rg16float -
  • 32-bit float (RG) rg32float -
  • 8-bit fixed (A) a8fixed -
  • 16-bit float (A) a16float -
  • 32-bit float (A) a32float -

Depth Space depthspace - -

  • Input input -
  • Camera Space cameraspace -
  • Reranged from Camera Space reranged -

Range from rangefrom- -

"" rangefrom1 -


"" rangefrom2 -

Range to rangeto- -

"" rangeto1 -


"" rangeto2 -

Clamp to [0-1] clamp -

Gamma gamma -  


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. When the input is 32-bit float format, only nearest filtering will be used (regardless of what is selected).

Passes npasses - Duplicates the operation of the TOP the specified number of times.

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
Add • Analyze • Anti Alias • Blob Track • Blur • Cache Select • Cache • Channel Mix • CHOP to • Chroma Key • Circle • Composite • Constant • Convolve • Corner Pin • CPlusPlus • Crop • Cross • Cube Map • Depth • Difference • DirectX In • DirectX Out • Displace • Edge • Emboss • Feedback • Fit • Flip • GLSL Multi • GLSL • HSV Adjust • HSV to RGB • In • Inside • Introduction To TOPs id• Kinect • Layout • Leap Motion • Level • Lookup • Luma Blur • Luma Level • Math • Matte • Monochrome • Movie File In • Movie File Out • Multiply • NDI In • NDI Out • Noise • Normal Map • Null • Oculus Rift • OP Viewer • OpenColorIO • OpenVR • Out • Outside • Over • Pack • Photoshop In • PreFilter Map • Projection • Ramp • RealSense • Rectangle • Remap • Render Pass • Render Select • Render • Reorder • Resolution • RGB Key • RGB to HSV • Scalable Display • Screen Grab • Screen • Select • Shared Mem In • Shared Mem Out • Slope • SSAO • Substance Select • Substance • Subtract • SVG • Switch • Syphon Spout In • Syphon Spout Out • Text • Texture 3D • Texture iltering• Texture Sampling arameters• Threshold • Tile • Time Machine • TOP• TOP iewer• Touch In • Touch Out • Transform • Under • Video Device In • Video Device Out • Video Stream In • Video Stream Out • Vioso • Web Render

An Operator Family 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.

Each SOP has a list of Points. Each point has an XYZ 3D position value plus other optional attributes. Each polygon Primitive is defined by a vertex list, which is list of point numbers.

The width and height of an image in pixels. Most TOPs, like the Movie File In TOP can set the image resolution. See Aspect Ratio 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 Node Viewer), (2) a floating window (RMB->View... on node), or (3) a Pane that graphically shows the results of an operator.

A CHOP 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 Export.