TerrainLodRanges

Remarks

[docs/plan/31 § D3]. A level's range doubles with the level, which is what makes the screen-space size of a quad roughly constant: twice as far away, twice as coarse.

⚠ The morph band of a level ends exactly where the next level begins, and that identity is the whole no-crack argument. A node is fully morphed into its parent's grid by the time the parent takes over, so the two agree along the boundary they share. Any other arrangement — a global morph distance, a band that stops short, a ratio applied to the wrong end — leaves the finer node's shared edge somewhere the coarser node has no vertex, which is a crack that daylight comes through.

Fields and properties (4)

• public float NearRange

  How far level 0 reaches, in metres.

• public int LevelCount

  How many levels there are.

• public float MorphStartRatio

  Where in a level's band the morph starts, 0…1 of the way from the previous range to this one.

• public static TerrainLodRanges Default

  Five levels from 64 m, morphing over the last two fifths of each band.

Methods (6)

• public float RangeOf(int level)

  How far this level reaches, in metres. Beyond it, the next level takes over.

• public float BandStartOf(int level)

  Where this level's band begins — the previous level's range, or zero.

• public float MorphStartOf(int level)

  Where this level begins morphing towards its parent.

• public float MorphEndOf(int level)

  Where this level is fully morphed into its parent. Its range, exactly.

• public float MorphOf(int level, float distance)

  How far a node of this level has morphed at a distance, 0…1.

• public string? Validate()

  Why these ranges cannot be used, or null if they can.

Used by (7)

• TerrainLodTestsVixen.Terrain.Tests
• TerrainLodTreeVixen.Terrain
• TerrainRendererVixen.Rendering.Terrain
• TerrainRendererTestsVixen.Rendering.Terrain.Tests
• TerrainStreamingTestsVixen.Rendering.Terrain.Tests
• TypeRegistrationVixen.Terrain
• ScenePresenterVixen.Editor.App