Created
May 15, 2019 07:01
-
-
Save jaymcgavren/12d07800869806c9a16c172a2fa4af2c to your computer and use it in GitHub Desktop.
"quadraticvertex" sample from ruby-processing, ported to Visor.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
# sketch by Jan Vantomme | |
# Part of a series of articles on Processing 2. | |
# Blog post here: | |
# http://vormplus.be/blog/article/drawing-shapes-with-quadratic-vertices | |
# translated for ruby-processing by Martin Prout | |
# translated for Visor by Jay McGavren | |
attr_reader :debug, :step_angle, :cr, :detail | |
@debug = false | |
@detail = 7 | |
smooth 8 | |
@x ||= 100 | |
def draw | |
background 0 | |
translate width / 2, height / 2 | |
@step_angle = TAU / (detail.to_i - 1) | |
fill 255 | |
no_stroke | |
@cr = map(@x, 0, width, 20, 200) | |
begin_shape | |
detail.to_i.times do |i| | |
if (i == 0) | |
vertex cos_x(i), sin_y(i) | |
else | |
quadratic_vertex cos_cx(i), sin_cy(i), cos_x(i), sin_y(i) | |
end | |
end | |
end_shape(CLOSE) | |
if debug | |
# draw lines between points | |
stroke_weight(1) | |
no_fill | |
stroke(0) | |
begin_shape | |
detail.to_i.times do |i| | |
vertex cos_cx(i), sin_cy(i) unless i == 0 | |
vertex cos_x(i), sin_y(i) | |
end | |
end_shape CLOSE | |
# draw points | |
stroke_weight 8 | |
detail.to_i.times do |i| | |
stroke 0 | |
point cos_x(i), sin_y(i) | |
stroke 255, 0, 0 | |
point cos_cx(i), sin_cy(i) | |
end | |
end | |
end | |
def cos_x(n) | |
cos(step_angle * n) * 100 | |
end | |
def sin_y(n) | |
sin(step_angle * n) * 100 | |
end | |
def cos_cx(n) | |
cos(step_angle * n - (step_angle / 2)) * cr | |
end | |
def sin_cy(n) | |
sin(step_angle * n - (step_angle / 2)) * cr | |
end | |
def toggle_debug | |
@debug = !debug | |
end | |
# The MIT License (MIT) | |
# | |
# Copyright (c) 2019 Jay McGavren | |
# | |
# Permission is hereby granted, free of charge, to any person obtaining a copy | |
# of this software and associated documentation files (the "Software"), to deal | |
# in the Software without restriction, including without limitation the rights | |
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
# copies of the Software, and to permit persons to whom the Software is | |
# furnished to do so, subject to the following conditions: | |
# | |
# The above copyright notice and this permission notice shall be included in all | |
# copies or substantial portions of the Software. | |
# | |
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
# SOFTWARE. |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment