tests 50% done.

init.moon

@@ -953,7 +953,7 @@ isCircleCompletelyInsideCircle = (circle1x, circle1y, circle1radius, circle2x, c
 
 -- POLY  
 getSignedPolygonArea = (...) ->
-  points = {unpack(checkInput(...))}
+  points = checkInput(...)
 
   points[#points + 1] = points[1]
   points[#points + 1] = points[2]
@@ -984,7 +984,7 @@ getTriangleHeight = (base, ...) ->
   (2 * area) / base, area
 
 getCentroid = (...) ->
-  points = {unpack(checkInput(...))}
+  points = checkInput(...)
 
   points[#points + 1] = points[1]
   points[#points + 1] = points[2]
@@ -993,13 +993,13 @@ getCentroid = (...) ->
 
   centroidX = (1 / (6 * area)) * ( getSummation(1, #points / 2,
     (index) ->
-      index *= 2 - 1
+      index = index * 2 - 1
       return ((points[index] + cycle(points, index + 2 )) * ((points[index] * cycle(points, index + 3)) - (cycle(points, index + 2) * points[index + 1])))
   ))
 
   centroidY = (1 / (6 * area)) * (getSummation(1, #points / 2,
     (index) ->
-      index *= 2 - 1
+      index = index * 2 - 1
       return ((points[index + 1] + cycle(points, index + 3)) * ((points[index] * cycle(points, index + 3)) - (cycle(points, index + 2) * points[index + 1])))
   ))
 

mm_spec.moon

@@ -581,3 +581,60 @@ describe "circle.isCircleCompletelyInside", ->
     assert.true circle.isCircleCompletelyInside( 1, 1, 2, 2, 1, 4 )
     assert.true circle.isCircleCompletelyInside( 1, 1, 3, 2, 1, 4 )
     assert.false circle.isCircleCompletelyInside( 8, 2, .1, 2, 1, 4 )
+
+
+describe "polygon.getTriangleHeight", ->
+  it " :: Given points of triangle and length of base.", ->
+    polygon = mm.polygon
+    assert.multipleFUzzyEqual {polygon.getTriangleHeight( 3, 0, 0, 0, 4, 3, 0 )}, {4, 6}
+    assert.multipleFUzzyEqual {polygon.getTriangleHeight( 6, -2, 1, 2, 4, 4, 1 )}, {3, 9}
+    assert.multipleFUzzyEqual {polygon.getTriangleHeight( 3, 1, 1, 3, 4, 0, 4 )}, {3, 4.5}
+
+  it " :: Given the length of the base and the area.", ->
+    polygon = mm.polygon
+    assert.fuzzyEqual polygon.getTriangleHeight( 3, 6 ), 4 
+    assert.fuzzyEqual polygon.getTriangleHeight( 6, 9 ), 3
+
+describe "polygon.getSignedArea", ->
+  it " :: Gives the sigend area of the shape. Positive if clockwise.", ->
+    polygon = mm.polygon
+    assert.fuzzyEqual polygon.getSignedArea( 0, 0, 3, 0, 3, 4, 0, 4 ), 12
+    assert.fuzzyEqual polygon.getSignedArea( 0, 0, 3, 0, 0, 4 ), 6
+    assert.fuzzyEqual polygon.getSignedArea( 4, 4, 0, 4, 0, 0, 4, 0 ), 16
+
+  it " :: Negative if counter clock-wise.", ->
+    polygon = mm.polygon
+    assert.fuzzyEqual polygon.getSignedArea( 0, 0, 0, 4, 3, 4, 3, 0 ), -12
+    assert.fuzzyEqual polygon.getSignedArea( 0, 0, 0, 4, 3, 0 ), -6
+
+
+describe "polygon.getArea", ->
+  it " :: Gives the sigend area of the shape. Positive if clockwise.", ->
+    polygon = mm.polygon
+    assert.fuzzyEqual polygon.getArea( 0, 0, 3, 0, 3, 4, 0, 4 ), 12
+    assert.fuzzyEqual polygon.getArea( 0, 0, 3, 0, 0, 4 ), 6
+    assert.fuzzyEqual polygon.getArea( 4, 4, 0, 4, 0, 0, 4, 0 ), 16
+
+  it " :: Gives the area of the shape. Negative if counter clock-wise.", ->
+    polygon = mm.polygon
+    assert.fuzzyEqual polygon.getArea( 0, 0, 0, 4, 3, 4, 3, 0 ), 12
+    assert.fuzzyEqual polygon.getArea( 0, 0, 0, 4, 3, 0 ), 6
+
+describe "polygon.getCentroid", ->
+  it " :: Gives the x and y of the centroid.", ->
+    polygon = mm.polygon
+    assert.multipleFUzzyEqual {polygon.getCentroid( 0, 0, 0, 4, 4, 4, 4, 0 )}, { 2, 2 }
+    assert.multipleFUzzyEqual {polygon.getCentroid( 0, 0, 0, 6, 3, 0 ) }, { 1, 2 } 
+    assert.multipleFUzzyEqual {polygon.getCentroid( 2, -1, 2, 1, 1, 2, -1, 2, -2, 1, -2, -1, -1, -2, 1, -2 ) }, { 0, 0 }
+    assert.multipleFUzzyEqual {polygon.getCentroid( 2, 0, 3, 0, 4, 1, 3, 2, 2, 2, 1, 1 ) }, { 2.5, 1 }
+    assert.multipleFUzzyEqual {polygon.getCentroid( 3, 5, 2, 2, 4, 2 ) }, { 3, 3 }
+
+describe "polygon.isSegmentInside", ->
+  it " :: Returns true if the segment is fully inside the polygon.", ->
+    polygon = mm.polygon
+    assert.true polygon.isSegmentInside( 4, 4, 4, 5, 4, 3, 2, 5, 3, 6, 5, 6, 6, 5 )
+    assert.false polygon.isSegmentInside( 6, 3, 7, 6, 4, 3, 2, 5, 3, 6, 5, 6, 6, 5 )
+
+  it " :: True if at least part of the segment is on/inside.", ->
+    polygon = mm.polygon
+    assert.true polygon.isSegmentInside( 6, 3, 4, 5, 4, 3, 2, 5, 3, 6, 5, 6, 6, 5 )

vec2D_spec.moon

@@ -1,9 +1,8 @@
 m = assert require 'moon'
 dump = m.p
 
-mm = assert require "init"
-vec2D = mm.vec2D!
-vec2DArr = mm.vec2DArr!
+vec2D = assert require "vec2D"
+vec2DArr = assert require "vec2DArr"
 
 checkFuzzy = (a, b) ->
   (a - .00001 <= b and b <= a + .00001)