Class: Point

Attributes

x[RW]

y[RW]

z[RW]

Public Class Methods

new(x, y, z = 0) click to toggle source

x	x coordinate of the point
y	y coordinate of the point
z	z coordinate of the point (optional)

Initializes the point

     # File lib/geometry.rb, line 168
168:         def initialize(x, y, z = 0)

169:                 @x, @y, @z = x, y, z

170:         end

Public Instance Methods

clone() click to toggle source

returns

a Point object identical to this

     # File lib/geometry.rb, line 195
195:         def clone()

196:                 return Point.new(@x, @y, @z)

197:         end

distance(another_point) click to toggle source

another_point	a Point object
returns	the distance between this point and another_point

     # File lib/geometry.rb, line 175
175:         def distance(another_point)

176:                 return Math.sqrt((@x - another_point.x)**2 + (@y - another_point.y)**2)

177:         end

project_to_line(line_descriptor, a, b) click to toggle source

line_descriptor	a LineDescriptor object
a	a Point object of the line described by line_descriptor
b	a Point object of the line described by line_descriptor, distinct from a
returns	the point in the line_descriptor that is the ortogonal projection of this point on the line described by line_descriptor

     # File lib/geometry.rb, line 184
184:         def project_to_line(line_descriptor, a, b)

185:                 r = ((a.y - @y)*(a.y - b.y) - (a.x - @x)*(b.x - a.x)).quo(Math.sqrt((b.x - a.x)**2 + (b.y - a.y)**2)**2)

186:                 

187:                 px = a.x + r*(b.x - a.x)

188:                 py = a.y + r*(b.y - a.y)

189:                 

190:                 return Point.new(px, py, 0)

191:                 

192:         end

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