Add a uvmap for MeshDraft.Dodecahedron

[BasmanovDaniil]

All other primitives have a more or less sensible uvmap, Dodecahedron should have one too. Also, it will have to be constructed in some other way, AddFlatTriangleBand is not very convenient in this case.

ProceduralToolkit/Scripts/MeshDraftPrimitives.cs

Lines 118 to 148 in ff54823

	public static MeshDraft Dodecahedron(float radius)
	{
	const float magicAngle1 = 52.62263590f;
	const float magicAngle2 = 10.81231754f;
	const float segmentAngle = 72;
	float lowerAngle = 0;
	float upperAngle = segmentAngle/2;
	var lowerCap = new Vector3[5];
	var lowerRing = new Vector3[5];
	var upperCap = new Vector3[5];
	var upperRing = new Vector3[5];
	for (var i = 0; i < 5; i++)
	{
	lowerCap[i] = Geometry.PointOnSphere(radius, lowerAngle, -magicAngle1);
	lowerRing[i] = Geometry.PointOnSphere(radius, lowerAngle, -magicAngle2);
	upperCap[i] = Geometry.PointOnSphere(radius, upperAngle, magicAngle1);
	upperRing[i] = Geometry.PointOnSphere(radius, upperAngle, magicAngle2);
	lowerAngle += segmentAngle;
	upperAngle += segmentAngle;
	}
	var draft = new MeshDraft {name = "Dodecahedron"}
	.AddTriangleFan(upperCap, Vector3.up)
	.AddFlatTriangleBand(upperRing, upperCap, false)
	.AddFlatTriangleBand(lowerRing, upperRing, false)
	.AddFlatTriangleBand(lowerCap, lowerRing, false)
	.AddTriangleFan(lowerCap, Vector3.down, true);
	return draft;
	}