Abstract
Volume Rendering is the way to achieve 3D visualization. Volume Rendering is used for visualization of 2D projections of 3D data. In volume rendering techniques, direct volume rendering techniques (DVR) can be divided into image order and object order. Image order technique can be achieved by ray-casting algorithm. Ray-casting algorithm is used for raysurface interaction tests to solve problems in computer graphics like collision detection and hidden surface removal. In DVR, the ray is pushed through the object and 3D scalar field of interest is sampled along the ray inside the object. Over the years, different approaches towards this algorithm took place. This paper represents the review and analysis of different approaches of raycasting algorithm
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