A fast ray casting algorithm using adaptive isotriangular subdivision
Renben Shu, Alan Liu · IEEE Visualization · 1991
Ray casting is a popular method of rendering high quality images from volume data. Its main shortcoming has been the high computational expense. This paper proposes a method of subdividing the image plane with isosceles triangles instead of quadrants as is usually done, resulting in fewer rays being fired without sacrificing image quality. A brief theoretical analysis of the algorithm in comparison with other methods is given.