Struct Raycaster2D 

pub struct Raycaster2D { /* private fields */ }

DDA Raycaster Engine for 2.5D Grid Maps.

Implementations

impl Raycaster2D

pub fn new(width: usize, height: usize) -> Self

pub fn render_walls( &self, pos_x: f32, pos_y: f32, angle: f32, head_bob: i32, map: &[u8], map_size: usize, wall_colors: &[Rgb565], z_buffer: &mut [f32], framebuf_u32: &mut [u32], )

Render 3D textured walls over an existing Mode 7 / background framebuffer.

pub fn render_walls_textured<F>( &self, pos_x: f32, pos_y: f32, angle: f32, head_bob: i32, map: &[u8], map_size: usize, z_buffer: &mut [f32], framebuf_u32: &mut [u32], get_pixel: F, )

where F: Fn(u8, usize, usize) -> Rgb565,

Render 3D textured walls using a per-tile pixel callback instead of a flat colour palette.

The get_pixel closure receives (tile_id, tex_x, tex_y) and returns the raw Rgb565 texel before distance shading is applied. This lets callers supply hand-painted bitmaps, procedural patterns (brick mortar, tech panels, hazard stripes …) or atlas lookups without the overhead of a full texture object.

All other parameters are identical to Self::render_walls.

pub fn render_sprites_fast<P, F, T>( &self, pos_x: f32, pos_y: f32, angle: f32, head_bob: i32, sprites: &[RaycastSprite], z_buffer: &[f32], framebuf: &mut [Rgb565], prepare_sprite: P, get_pixel: F, )

where P: Fn(&RaycastSprite, f32) -> Option<T>, F: Fn(&T, usize, usize, usize, usize) -> Option<Rgb565>,

Fast-path sprite rendering using a per-sprite setup callback and per-pixel color getter.

prepare_sprite(sprite, transform_y) is called ONCE PER SPRITE with the perpendicular distance transform_y. Return None to skip rendering the sprite, or Some(data) to pass pre-calculated properties (such as pre-shaded colors) to get_pixel.

pub fn render_sprites<F>( &self, pos_x: f32, pos_y: f32, angle: f32, head_bob: i32, sprites: &[RaycastSprite], z_buffer: &[f32], framebuf: &mut [Rgb565], get_color: F, )

where F: Fn(&RaycastSprite, f32) -> Option<Rgb565>,

Render billboarded 2.5D sprites (enemies, items, projectiles) into a per-pixel Rgb565 framebuffer with z-buffer occlusion against previously rendered walls.

Trait Implementations

impl Clone for Raycaster2D

fn clone(&self) -> Raycaster2D

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Raycaster2D

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.