Feature/#14 display ground #15

Merged k-fujii merged 2 commits into nitta-lab:develop from nitta-lab:feature/#14_display_ground on 16 Nov 2021
2021-11-16
画面設定用の定数クラスの名前を変更
k-fujii committed on 16 Nov 2021
地面を仮描画しました.
k-fujii committed on 16 Nov 2021