Fuzion • Idioms • Idiom # 178: Check if point is inside rectangle

Idiom # 178: Check if point is inside rectangle

Functional Approach

Code

b := x1 < x < x2 && y1 < y < y2

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b := x1 < x < x2 && y1 < y < y2
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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What are effects?

Running Example

ex178 is

  _ := for i := 0.3, i+0.3
       while i < 1.3 do

         x := i
         y := i*2

         x1 := 0.0
         x2 := 1.0
         y1 := 0.0
         y2 := 2.0

         b := x1 < x < x2 && y1 < y < y2

         say "Point $x,$y is {if b then "" else "not "}inside of rectangle $x1,$y1,$x2,$y2"

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ex178 is
  _ := for i := 0.3, i+0.3
       while i < 1.3 do
         x := i
         y := i*2
         x1 := 0.0
         x2 := 1.0
         y1 := 0.0
         y2 := 2.0
         b := x1 < x < x2 && y1 < y < y2
         say "Point $x,$y is {if b then "" else "not "}inside of rectangle $x1,$y1,$x2,$y2"
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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What are effects?

Object-oriented Approach

Code

point (x, y f64) is

rectangle(a, b point) is
  is_inside (p point) =>
    (a.x < p.x < b.x &&
     a.y < p.y < b.y)

  x := 0.3
  y := 1.1
  p := point x y

  x1 := 0.0
  x2 := 1.0
  y1 := 0.0
  y2 := 2.0
  r := rectangle (point x1 y1) (point x2 y2)

  b := r.is_inside p

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point (x, y f64) is
rectangle(a, b point) is
  is_inside (p point) =>
    (a.x < p.x < b.x &&
     a.y < p.y < b.y)
  x := 0.3
  y := 1.1
  p := point x y
  x1 := 0.0
  x2 := 1.0
  y1 := 0.0
  y2 := 2.0
  r := rectangle (point x1 y1) (point x2 y2)
  b := r.is_inside p
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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What are effects?

Running Example

ex178b is

  point (x, y f64) is
  rectangle(a, b point) is
    is_inside (p point) =>
      (a.x < p.x < b.x &&
       a.y < p.y < b.y)

  _ := for i := 0.3, i+0.3
       while i < 1.3 do
         x := i
         y := i*2
         p := point x y

         x1 := 0.0
         x2 := 1.0
         y1 := 0.0
         y2 := 2.0
         r := rectangle (point x1 y1) (point x2 y2)

         b := r.is_inside p

         say "Point $x,$y is {if b then "" else "not "}inside of rectangle $x1,$y1,$x2,$y2"

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ex178b is
  point (x, y f64) is
  rectangle(a, b point) is
    is_inside (p point) =>
      (a.x < p.x < b.x &&
       a.y < p.y < b.y)
  _ := for i := 0.3, i+0.3
       while i < 1.3 do
         x := i
         y := i*2
         p := point x y
         x1 := 0.0
         x2 := 1.0
         y1 := 0.0
         y2 := 2.0
         r := rectangle (point x1 y1) (point x2 y2)
         b := r.is_inside p
         say "Point $x,$y is {if b then "" else "not "}inside of rectangle $x1,$y1,$x2,$y2"
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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What are effects?

last changed: 2024-07-01

next: Idiom # 179: Get center of a rectangle