TerrainTool

Remarks

Seven sculpt tools plus holes — [docs/plan/31 § The sculpt tools]. The list is the intersection of Unreal's Landscape and Unity's Terrain, plus Ramp, which only Unreal has and which is what a level designer reaches for between two playtests.

⚠ Holes is last and is not the eighth sculpt tool. It paints a visibility bit rather than a height, so it writes TerrainHoles rather than an edit layer, and it is the one tool in the strip whose stroke a TerrainStrokeCommand cannot record — see that type's remarks. Grouping it with the seven is the references' layout and the honest ordering for an artist; treating it as one of them in code is the mistake the two storage models make visible.

Fields and properties (8)

• Sculpt

  Raises the ground; Shift lowers it.

• Smooth

  Averages the ground under the brush with its neighbours.

• Flatten

  Pulls the ground towards a height picked at the start of the stroke.

• Ramp

  A straight ramp between two picked points.

• Erosion

  Thermal erosion: material steeper than the talus angle slides downhill.

• Hydro

  Hydraulic erosion: channels deepen and shoulders fill.

• Noise

  Adds fractal noise.

• Holes

  Paints the visibility mask, so a quad can be removed for a cave mouth.

Used by (8)

• SculptSessionTestsVixen.Editor.Terrain.Tests
• TerrainEditVixen.Editor.Terrain
• TerrainEditTestsVixen.Editor.Terrain.Tests
• TerrainModeVixen.Editor.Terrain
• TerrainModeTestsVixen.Editor.Terrain.Tests
• TerrainPanelTestsVixen.Editor.Terrain.Tests
• TerrainSessionTestsVixen.Editor.App.Tests
• TerrainToolSettingsVixen.Editor.Terrain