QcRiverField::Sample Struct

Member Variable Documentation

double Sample::depth

Depth of the water at the middle line below the water surface.

double Sample::distance

Blocks from the middle line of the nearest river, about (the noise over its slope); far away from rivers.

double Sample::halfWidth

Half the width of the water at this point of the river, 0 where none runs.

double Sample::nearDistance

Blocks from the middle line, estimated with the noise's bend as well as its slope: at most distance, close to it where the noise rises evenly, and growing by about a block per block also where the noise flattens (a shallow hill or hollow just past zero), where distance grows by several blocks per block (decision E-969). far where distance is.

double Sample::nearHalfWidth

halfWidth with the fading of small rings also where only nearDistance lies within reach (halfWidth has it only within reach of distance; decision E-969).

double Sample::steepness

How much steeper than usual the banks rise: 1 in low land, more in rugged land, where the river runs through a gorge.

double Sample::strength

How much of the valley is carved (0..1): 1 along the river, falling to 0 where the river ends in dry land or at a tight bend of its zero line.

double Sample::value

The river noise at the column (its zero line is the middle line of the rivers), wherever the river field was asked and the land is not dry; far elsewhere. The river deltas (decision E-850) read it to skip columns far from every river at once.