CombineDisplacement

Overview

CombineDisplacement is meant to handle one Displacement of both types: NormalDisplacement and VectorDisplacement. When combining two Displacements of the same type, use LayerMap or OpMap for the data that will connect to displacement.

This combination does not consider ordering for orientation; both inputs are displacing using the geometry normals.

Attribute Reference

General attributes

bound_padding

Float
default: 0.0

bound padding defines how much to extend the bounding box of the object. Keep this value as low as possible unless the geometry skips tessellation because control cage bounding box is out of camera frustum but the displacement stretch out of the original object bounding box (pre-displacement). Setting the bound padding too large will consume more memory and tessellation time.

input_1

Displacement
default: None

Displacement object 1

input_2

Displacement
default: None

Displacement object 2

operation

Int enum
  0 = “add” (default)
  1 = “max magnitude”
  2 = “min magnitude”

The method used for combining the displacements

scale_1

Float bindable
default: 1.0

Scale of input 1

scale_2

Float bindable
default: 1.0

Scale of input 2

Examples

local checkermap = CheckerboardMap("/Scene/surfacing/checkermap") {
}

local noiseWorley = NoiseWorleyMap("/Scene/surfacing/noiseWorley") {
    ["space"] = 2,
    ["scale"] = Vec3(0.05, 0.05, 0.05),
    ["use smoothstep"] = true,
}

local vDisplacement = VectorDisplacement("/Scene/surfacing/vDisplacement") {
    ["vector"] = bind(noiseWorley),
    ["factor"] = 1,
    ["source space"] = 1,
}

local nDisplacement = NormalDisplacement("/Scene/surfacing/nDisplacement") {
    ["height"] = bind(checkermap, 1),
}

-- note that inputs 1 and 2 are different types of displacement map
local combineDisplacement1 = CombineDisplacement("/Scene/surfacing/combineDisplacement1") {
    ["operation"] = 0,
    ["input 1"] = vDisplacement,
    ["scale 1"] = 10,
    ["input 2"] = nDisplacement,
    ["scale 2"] = bind(noiseWorley, 8),
}