Find attached a M8 test project. It contains main three components [VECTOR], [RASTER] and
[1 UPDATE SELECTED PIXELS].
[VECTOR] and [RASTER] are subsets taken from larger extent components in a M9 project.
[1 UPDATE SELECTED PIXELS] is the way I would approach this in M8 i.e. select all objects in [VECTOR], transfer this selection to [RASTER] and then run this query.
The M9 project creates the surface as a subset of a lidar grid including all pixels with heights <=1.8m.and all other pixels set to invisible. The vector feature is the result of a ‘Trace Areas’ transform operating on the same grid with some polygons such as those along the river removed from the resulting drawing.
For this example, all I wish to do is use Manifold 9 to update the pixels under the vector polygons with a value of 99. As Tim suggests however, I am also interested in more general cases of interactions between geom and pixels as outlined.
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