Major progress in introducing arbitrary boundaries! EDT in the house.

fluid/boundary.go

@@ -0,0 +1,19 @@
+package fluid
+
+type BoundaryDimensions struct {
+	X int
+	Y int
+}
+
+type Boundary struct {
+	Dimensions BoundaryDimensions
+	Cells      []bool
+}
+
+func NewBoundary(dimensions BoundaryDimensions) *Boundary {
+	b := &Boundary{
+		Dimensions: dimensions,
+		Cells:      make([]bool, dimensions.X*dimensions.Y),
+	}
+	return b
+}