Floorcasting

Floorcasting

Floorcasting is the name of the technique to draw floors in the Raycasting projection by some texture. If you don't want to render a texture in the floor, the Floorcasting is not needed because you just need to draw color lines from the end of the wall to the end of the projection. So, lets check how to create the Floorcasting.

There are some techniques (vertical strip render, horizontal strip render, etc...) that can be used to render the Floorcasting, but for this tutorial I will use the easiest one that I found (vertical strip render). It is not the best technique since the processing used is not so optimized.

To make the Floorcasting, we will start to iterate from the next pixel after the wall to the last pixel of the projection. For each pixel, we will calculate the distance of this pixel, and get the coordinates using this distance to discover the tile in the map. With the tile we can find the texture that will be used for this pixel.