From b1e6e9f15eb84d729812d27cc9abb9ed2ffeed8b Mon Sep 17 00:00:00 2001
From: nobu09 <11857481+nobu09@users.noreply.github.com>
Date: Sun, 10 Dec 2023 22:06:23 +0900
Subject: [PATCH] =?UTF-8?q?=E9=80=86=E4=B8=89=E8=A7=92=E5=BD=A2=E3=82=92?=
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---
 programs/tree.rb | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/programs/tree.rb b/programs/tree.rb
index 0a9770f..190ebe7 100644
--- a/programs/tree.rb
+++ b/programs/tree.rb
@@ -28,4 +28,22 @@ def draw
     xIndex -= 0.5
     yIndex += 1
   end
+
+  fill("mediumseagreen")
+
+  # 逆三角形を描いていく
+  xIndex = $split / 2 - 0.5
+  yIndex = 1
+
+  for yIndex in 1..$split
+    xAdjust = 0
+
+    for xCount in 0...yIndex
+      triangle($xSlide * (xIndex + xAdjust), $ySlide * yIndex, $xSlide * (xIndex + xAdjust ++ 0.5), $ySlide * (yIndex + 1), $xSlide *(xIndex + xAdjust + 1), $ySlide * yIndex)
+      xAdjust += 1
+    end
+
+    xIndex -= 0.5
+    yIndex += 1
+  end
 end