program_02

PROGRAM_02 - Point/Triangle Orientation

  Define a triangle T:
  Enter [ T.v1.x, T.v1.y]: [4,0]
  Enter [ T.v2.x, T.v2.y]: [3,4]
  Enter [ T.v3.x, T.v3.y]: [0,1]

  Orientation test value = 3.638034
  The triangle is properly oriented.

  Edge1 = v2-v1, length = 4.123106
  Edge2 = v3-v2, length = 4.242641
  Edge3 = v1-v3, length = 4.123106

  Now we see whether a point is in the triangle.


  Enter a point [ P.x, P.y], or RETURN to quit: [3,2]

  Distance to line through edge 1 = 0.485071
  Distance to line through edge 2 = 1.414214
  Distance to line through edge 3 = 1.697749
  The point is INSIDE the triangle.

  Enter a point [ P.x, P.y], or RETURN to quit: [2,3]

  Distance to line through edge 1 = 1.212678
  Distance to line through edge 2 = 0.000000
  Distance to line through edge 3 = 2.425356
  The point is ON the triangle

  Enter a point [ P.x, P.y], or RETURN to quit: [1,4]

  Distance to line through edge 1 = 1.940285
  Distance to line through edge 2 = -1.414214
  Distance to line through edge 3 = 3.152963
  The point is OUTSIDE the triangle

  Enter a point [ P.x, P.y], or RETURN to quit: [3,4]

  Distance to line through edge 1 = 0.000000
  Distance to line through edge 2 = 0.000000
  Distance to line through edge 3 = 3.638034
  The point is ON the triangle

  Enter a point [ P.x, P.y], or RETURN to quit: [4,4]

  Distance to line through edge 1 = -0.970143
  Distance to line through edge 2 = 0.707107
  Distance to line through edge 3 = 3.880570
  The point is OUTSIDE the triangle

  Enter a point [ P.x, P.y], or RETURN to quit: [3,4]

  Distance to line through edge 1 = 0.000000
  Distance to line through edge 2 = 0.000000
  Distance to line through edge 3 = 3.638034
  The point is ON the triangle

  Enter a point [ P.x, P.y], or RETURN to quit: [4,4]

  Distance to line through edge 1 = -0.970143
  Distance to line through edge 2 = 0.707107
  Distance to line through edge 3 = 3.880570
  The point is OUTSIDE the triangle

  Enter a point [ P.x, P.y], or RETURN to quit: [3,5]

  Distance to line through edge 1 = -0.242536
  Distance to line through edge 2 = -0.707107
  Distance to line through edge 3 = 4.608177
  The point is OUTSIDE the triangle

  Enter a point [ P.x, P.y], or RETURN to quit: [4,5]

  Distance to line through edge 1 = -1.212678
  Distance to line through edge 2 = 0.000000
  Distance to line through edge 3 = 4.850713
  The point is OUTSIDE the triangle

  Enter a point [ P.x, P.y], or RETURN to quit: 

PROGRAM_02
  Normal end of execution.