書誌情報 : Journal of Information Processing, Vol. 24, No.4 (2016) pp. 690-699.
DOI: 10.2197/ipsjjip.24.690
ブラックホール時空におけるラスタライズ法の実装
##article.authors##
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山下, 義行
西九州大学 デジタル社会共創学環
https://researchmap.jp/read0018460
DOI:
https://doi.org/10.51094/jxiv.3613キーワード:
ラスタライズ法、 ブラックホール、 グラフィックスプロセッシングユニット抄録
一般相対論によればブラックホールの強い重力は光線の軌跡を湾曲させる．本研究ではこの湾曲を数値計算し，視点をブラックホール時空内に置いた場合の3D CG画像を生成する．既存研究では描画にレイトレーシング法が用いられているが，本研究ではラスタライズ法を採用する．曲がった時空において高速な透視投影を実現するため，あらかじめ適切に構築された計算メッシュ上で三千万本以上の光線の軌跡を計算し，描画時にはGPUによる補間を用いる．さらに，CGオブジェクトの線分および三角形ポリゴンを高精度に描画するため，動的分割技術（テッセレーション）を適用する．本手法により，通常のグラフィックスAPIを用いた従来の3D CGプログラミングと同様の方法で多様なCGプログラムを容易に記述できる．最近のGPUの演算能力を活用し，ノートPC上でも毎秒約100万ポリゴンに近い描画性能を達成した．
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