Short example of 3D rasterizing a scene.
Requires Futhark and SDL2 and SDL2-ttf libraries with associated header files.
Uses the expand function from the https://github.com/diku-dk/segmented
package to draw the triangles and reduce_by_index to simulate a
z-buffer. The interesting code lies in raster3d.fut in the
render_projected_triangles function.
There is room for improvement!
Run futhark pkg sync once and then make && ./demo for an interactive
terrain explorer. Requires SDL2 and SDL2-ttf C libraries with
associated header files.
Base controls:
- Shift+other action: Move or turn faster
- PageUp/PageDown: Increase/decrease draw distance
- g: Change generator
- Tab: Change navigation controls (see below)
- Ctrl+Tab: Change pixel coloring approach
- F1: Toggle text
- ESC: Exit (press once to exit the mouse grabbing, twice to exit the program)
Mouse controls for navigation (default):
- Mouse: Move around
- Ctrl+mouse: Move along the y axis instead of the z axis when moving the mouse horizontally
- Space: Move forward
Keyboard controls for navigation:
- Up/Down: Move forwards/backwards
- Alt+Up/Down: Turn upwards/downwards
- Left/Right: Turn left/right
- Alt+Left/Right: Turn downwards left/right
This demo was originally part of the https://github.com/diku-dk/futhark-array19 submission, but has been reworked to work with newer Futhark.