Class: Point3D

• Inheritance
• Description
• Class protocol
  • instance creation
• Instance protocol
  • accessing
  • double dispatching
  • polar coordinates
  • printing & storing
  • transformations

Inheritance:

   Object
   |
   +--Magnitude
      |
      +--ArithmeticValue
         |
         +--Point
            |
            +--Point3D

Package:

stx:libbasic2

Category:

Graphics-Geometry

Version:

rev: 1.3 date: 2022/07/02 12:53:33

user: cg

file: Point3D.st directory: libbasic2

module: stx stc-classLibrary: libbasic2

Description:

I represent a point in 3D space.

Class protocol:

 x: newX y: newY z: newZ

create and return a new point3D with coordinates newX, newY abd newZ

Instance protocol:

 x: xArg y: yArg z: zArg

 z

 z: something

 differenceFromPoint3D: aPoint

return the difference from aPoint - self.
(not used with points, but with subclass instances)

 productFromPoint3D: aPoint

return the product from aPoint * self.
(not used with points, but with subclass instances)

 quotientFromPoint3D: aPoint

return the quotient from aPoint / self.
(not used with points, but with subclass instances)

 sumFromPoint3D: aPoint

return the sum from aPoint + self.
(not used with points, but with subclass instances)

 r

return the receiver's radius in a polar coordinate system.
I.e. the length of a vector from 0@0@0 to the receiver

Usage example(s):

(10 @ 10 @ 10) r => 17.3205080756888 (7 @ 4 @ 3) dist:(17 @ 6 @ 2) => 10.2469507659596

 printOn: aStream

append a printed representation of the receiver to aStream

 * scale

Return a new Point that is the product of the
receiver and translation (which is a Point or Number).

 + translation

Return a new Point that is the sum of the
receiver and translation (which is a Point or Number).

 - translation

Return a new Point that is the difference of the
receiver and translation (which is a Point or Number).

 / scale

Return a new Point that is the quotient of the
receiver and translation (which is a Point or Number).