{{ message }}

Instantly share code, notes, and snippets.

# mieki256/anglemove.rb

Last active Mar 14, 2016
イージングを利用して角度を滑らかに変化させられるかDXRubyを使って実験
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
 #!ruby -Ku # -*- mode: ruby; coding: utf-8 -*- # Last updated: <2016/03/14 19:43:16 +0900> # # 角度を滑らかに変化させられるかテスト require 'dxruby' # quadratic ease in out # @param t [Number] 時間(0.0 - 1.0) # @param b [Number] 基準値 # @param c [Number] 変化量 # @param d [Number] 1.0 # @return [Number] 結果 def ease_in_out_quad(t, b, c, d) t /= (d / 2.0) return (c / 2.0 * t * t + b) if t < 1.0 t -= 1.0 return -c / 2.0 * (t * ( t -2.0) - 1) + b end def deg2rad(ang) return ang * Math::PI / 180.0 end srand(0) t = 0 v_begin = 0 v_duration = 1.0 v_change = rand(60) - 30 t_spd = rand(0.01..0.05) Window.loop do break if Input.keyPush?(K_ESCAPE) # 現在の角度を取得 ang = ease_in_out_quad(t, v_begin, v_change, v_duration) # 線で描画 cx = Window.width / 2 cy = Window.height / 2 px = 200 * Math.cos(deg2rad(ang)) + cx py = 200 * Math.sin(deg2rad(ang)) + cy Window.drawLine(cx, cy, px, py, C_WHITE) # 時間を進める t += t_spd if t >= 1.0 # 目標値を超えたら変化量を再設定 t = 0 v_begin += v_change v_change = rand(60) - 30 t_spd = rand(0.01..0.05) end end

Screenshot