core.raster.resolve (procNode)

Fold a layer of fixed-point changes into the layer they change: every cell of delta holds a whole number of 1/fixed units, added to layer; delta is then zero.

Built from the gather kernel reading delta's words as 32-bit integers, math.to_float, and a core.raster.blend pass that adds them, so every tile that holds a cell takes the result; delta is then written zero in every place it is stored. Every cell the tiles hold, the cells past the field included, takes its own change.

Inputs

• raster (Raster). The raster resolved.
• layer (String). Default "height". The layer the changes are added to.
• delta (String). Default "". The layer holding the changes as 32-bit integers.
• fixed (Number). Default 65536. At least 1. How many integer units make one unit of the layer.

Outputs

• raster: the raster with the changes added and delta zero.

Example

local raster = g.core.raster.new({ size = { x = 8, z = 8 }, resolution = 1, layers = { "height", "dig" } })
local resolved = g.core.raster.resolve({ raster = raster, layer = "height", delta = "dig", fixed = 65536 })
local total = g.core.raster.reduce({ raster = resolved, layer = "height", op = "sum" })

dig holds no change, so height stays 0 and total is 0.