PV3D Fundation

每一pv3d app 基本需要下面四個class

Viewport3D
自此看出去的視窗(比喻)

Scene3D
從viewport中看到的場景

Camera3D(可選:Camera3D、FreeCamera3D、FrustumCamera3D)
遊走在scene的視野

BasicRenderEngine(可選)
對Viewport、Scene、Camera進行繪製

文章出處:
http://www.insideria.com/2008/02/papervision3d-part-1-foundatio.html

座標轉換文章:
http://en.wikipedia.org/wiki/Quarterion
http://www.adobe.com/devnet/flash/articles/3d_classes_03.html
http://www.isner.com/tutorials/quatSpells/quaternion_spells_14.htm