1992年，德军总部

Name: 1992年，德军总部
Item: Game Engine Black Book: Wolfenstein 3D
Rating: 8
Author: martinrgb

Game Engine Black Book: Wolfenstein 3D - Review

同年，OpenGL 1.0 发布

RayCasting 3D 渲染

高度 = 缩放因子/距离

锁不锁帧？

渲染过程

状态栏的精灵图

RayCasting的优化

*souce:https://www.youtube.com/watch?v=nMAgogUyv3E*

如何绘制呢？

RayMarching,成本有点高
优化1：所有元素都跟网格对其

In a world with some constraints the problem becomes much simpler. If a map is made of aligned square blocks evenly distributed across a grid, a solution yielding 100% accuracy and low runtime overhead is to check for ’hits‘ only when a ray crosses the grid. This was the choice made for Wolfenstein 3D, and explains why the game can only draw perpendicular walls of 8 feet by 8 feet by 8 feet.

优化2：既然都是网格，可以根据轴与光线第一个交点来预测行进路径