[LogicalError]

Fixes #270.

Changes

• Default UV Scale in Chisel's Preferences (a user setting, ChiselEditorSettings.DefaultUVScale, 1 by default). Every surface of a new brush starts with that UV scale, keeping its translation and rotation.
  • ChiselDefaultUVScale.GiveTo is called wherever a new generator gets the active material: the create menu and the placement tools.
  • It sets the scale rather than multiplying it, so the placement tools giving it again while a brush is drawn doesn't compound it.
• Cylinder UVs: a cylinder wrote its layout (caps centered, the sides one after another round it) into its surfaces' UVs on every change, which reset any UVs set on them, including the default scale.
  • It now puts the layout on when the brush is built, on top of each surface's own UVs, as the sphere does with its map. A scaled side has its offset scaled too, so the texture still runs on from side to side.
  • A surface mapped in world space keeps its own UVs.
  • A cylinder saved before held the layout in its surfaces: on load its surfaces' UVs are set back to a new surface's, so it looks the same and isn't laid out twice.

Tests

• ChiselDefaultUVScaleTests: a new brush gets the scale on every surface, giving it again doesn't compound, and a scale of 1 leaves the surfaces as they are.
• ChiselCylinderUVTests: the generated mesh and the brush built in the editor are laid out as before, a surface's own UVs are kept when the cylinder changes, a scaled side keeps the sides in line, and a cylinder saved before looks the same.