fix: revert changes for the field edge detection

The attempt to better detect boundaries between fields
very close together resulted in zigzagged field edges
and currently we don't have a good way to straighten
them out.

Therefore, revert the field scanner change, it is better
sometimes not correctly detecting fields when they are
very close together than often generate zigzagged
headlands.

scripts/courseGenerator/Field.lua

@@ -17,7 +17,6 @@ function Field:init(id, num, boundary)
     self.islands = {}
     if boundary then
         self.boundary:calculateProperties()
-        self:_smoothBoundary()
     end
 end
 
@@ -67,7 +66,6 @@ function Field.loadSavedFields(fileName)
     for _, f in pairs(fields) do
         f:getBoundary():calculateProperties()
         f:setupIslands()
-        f:_smoothBoundary()
     end
     return fields
 end

scripts/courseGenerator/test/FieldTest.lua

@@ -3,15 +3,15 @@ lu.EPS = 0.01
 function testField()
     local fields = CourseGenerator.Field.loadSavedFields('fields/Coldborough.xml')
     lu.assertEquals(#fields, 9)
-    lu.assertEquals(#fields[8].boundary, 90)
+    lu.assertEquals(#fields[8].boundary, 135)
     local field = fields[8]
     local center = field:getCenter()
-    lu.assertAlmostEquals(center.x, 381.41, 0.1)
-    lu.assertAlmostEquals(center.y, 31.3, 0.1)
+    lu.assertAlmostEquals(center.x, 380.8, 0.1)
+    lu.assertAlmostEquals(center.y, 31.14, 0.1)
     local x1, y1, x2, y2 = field:getBoundingBox()
-    lu.assertAlmostEquals(x1, 307.18)
-    lu.assertAlmostEquals(y1, -80.66)
-    lu.assertAlmostEquals(x2, 452.82)
-    lu.assertAlmostEquals(y2, 157.16)
+    lu.assertAlmostEquals(x1, 307.15)
+    lu.assertAlmostEquals(y1, -80.84)
+    lu.assertAlmostEquals(x2, 452.84)
+    lu.assertAlmostEquals(y2, 157.33)
 end
 os.exit(lu.LuaUnit.run())

scripts/field/FieldScanner.lua

@@ -14,7 +14,7 @@ function FieldScanner:init(resolution)
     -- sure if it is 1 or 0.5, so 0.2 seems to be a safe bet
     self.resolution = resolution or 0.2
     self.highResolution = 0.1
-    self.normalTracerLookahead = 3.0
+    self.normalTracerLookahead = 5.0
     self.shortTracerLookahead = self.normalTracerLookahead / 10
     self.angleStep = self.highResolution / self.normalTracerLookahead
 end