FLOOR CASTING (continued)The math behind floorcasting is explained in the Figure 25 below. Figure 25: The math behind
floorcasting. To reiterate, take a look at the illustration while reading these steps:
1. Take the pixel. 2. Draw a line (a ray) from the pixel to the viewers eye. 3. Extends the line so that it intersect the floor. 4. The point where the line "intersect" the floor is the point on the texture map that is being hit by the ray. 5. Take the pixel value of that point on the texture map (see the next figure to see how this can be done) and draw it on the screen. * Repeat 15 until the bottom of the screen is reached.

