pointMapRender

Shortcuts:

• pmr

Keywords:

• point
• render
• volumetric

SDF or Field

Camera

Light

output

pointMapRender

RayTK

v0.42

Renderer that takes in a TOP of coordinates and evaluates the scene at each point.

The primary use for this is with TOP-based instancing for a Geometry COMP:

• Create a TOP with a coordinate value in each pixel. For example, this could be point cloud data, or converted points from a SOP/CHOP.
• Create your RayTK scene network, with an SDF or value/vector field.
• (Optionally) add a sampledPointMat to the scene to control how colors are applied to shapes.
• Create a pointMapRender, and connect the scene to the first input and the coordinate TOP to the TOP input.
• The TOP that comes out of the “Color” output will be a TOP with the same dimensions as the coordinate TOP, with a color value for each pixel, based on the scene.
• On a Geometry COMP, with instancing on, use the coordinate TOP for the instance positions, and use the colors TOP from the pointMapRender for the instance colors.

Other uses include:

• LED pixel mapping, where you use the physical location of each LED for the coordinates, and apply the resulting colors to each LED.
• GPU particles, where the simulation GLSL TOP produces coordinates from one buffer, which are run through the pointMapRender, and then feed the resulting values back into the simulation to control particle forces for each particle/pixel.

The “SDF or Value” output, when using an SDF scene, will output values where the RGB channels contain the distance to the surface. The alpha channel will be one for points that existed in the input map and zero for ones that did not. In other words the alpha channel will be the same as the alpha channel in the input point map.

Parameters

Name	Description	Regular Handling	Read-Only Handling
Pixel Format
Use Input: 8-bit fixed (RGBA): sRGB 8-bit fixed (RGBA): 16-bit float (RGBA): 32-bit float (RGBA): _separator_: 10-bit RGB, 2-bit Alpha, fixed (RGBA): 16-bit fixed (RGBA): 11-bit float (RGB), Positive Values Only: 8-bit fixed (Mono): 16-bit fixed (Mono): 16-bit float (Mono): 32-bit float (Mono): 8-bit fixed (RG): 16-bit fixed (RG): 16-bit float (RG): 32-bit float (RG): 8-bit fixed (A): 16-bit fixed (A): 16-bit float (A): 32-bit float (A): 8-bit fixed (Mono+Alpha): 16-bit fixed (Mono+Alpha): 16-bit float (Mono+Alpha): 32-bit float (Mono+Alpha):
Enable Normal Output	Enable producing normal vectors. For each point, this will produce a vector pointing in the direction that the nearest surface point is facing. These values can be accessed using a renderSelect operator.
Enable Object Id Output	Enable object ID output, which produces a TOP with values assigned with the injectObjectId operator for whichever shape each point is inside.
Time Reference Operator
Shader Builder Config
Coord Type
Auto: 2D: 3D:
Output Type
2D Texture: 2D Texture Array: 3D Texture:
Enable Density Output
Enable Debug Output
Enable Custom Output 1
Enable Custom Output 2
Enable Normal Smoothing	Whether to smooth out surface normals by sampling at larger distances.	Baked	Baked
Normal Smoothing	How far apart to sample to calculate surface normals.	Runtime	Baked
Material Mode		Semi-Baked	Semi-Baked
Only Inside SDF: Only SDF Surface: Fill Everwhere:
Enable Blending
Blending
Thickness
Customize Shader Config

Inputs

• SDF or Field: (optional)
  • Coordinate Types: float vec2 vec3 vec4
  • Context Types: Context
  • Return Types: float vec4 Sdf
  • Supports Variables: datapos datauv datares
• Camera: (optional)
  • Coordinate Types: vec2
  • Context Types: CameraContext
  • Return Types: Ray
  • Supports Variables: datapos datauv datares
• Light: (optional)
  • Coordinate Types: vec3
  • Context Types: LightContext
  • Return Types: Light
  • Supports Variables: datapos datauv datares

Variables

• Data Coord (Pixels):
• Data Coord (0..1):
• Data Resolution (Pixels):