This is an attempt to create a pseudo-3D renderer using raycasting. Written in Java, using java.awt.Graphics and fillRect() commands to render. This is not true 3D - it is a top down grid-world being rendered in such a way that it looks 3D. For each column of pixels on the screen, a ray is cast from the player to determine the distance to the nearest wall. That wall slice is then drawn in the pixel column, with the slice being taller if the wall is close and shorter if the wall is far.
Here's what the project looks like running! (Mild motion-sickness warning, the second video is smoother)
raycasting_demo_1.mp4
More of a doom style/enclosed feel, just changing the colors:
raycasting_demo_2.mp4
Move the character with W and S and look around with A and D. There is simple acceleration and friction to make the controls feel better (only for movement, not for looking around). The player collides with walls and the edge of the world.
The world is grid-based and can be changed to be any size with any number of walls. Walls are a set height and can be given a 15x15 texture. Any number of different textures and colors are supported.
Code is written to be easily modified for a different window size, FOV, player width, etc.
- Player controls character movement and direction facing
- Walls render at correct height and shading depending on the location of the player
- Walls, floor, and ceiling have simple textures
All of the original goals except for floor and ceiling texturing are done. Floor/ceiling-casting ended up being more time consuming than expected.
- Aforementioned floor and ceiling casting to support textures for the floors and ceilings
- Walls of variable height
- Read textures from png files rather than hardcoding
- Support for textures of variable sizes
- Make looking side to side feel more natural (add acceleration?)
Many of the concepts used to create this demo were adapted from this website.
Copyright © 2021 Eric Anderson
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