GlRenderer

pub fn new(canvas: &HtmlCanvasElement) -> Result<GlRenderer, JsValue>

Create a renderer on canvas; fails if WebGL2 is unavailable.

pub fn set_on_ready(&mut self, f: Rc<dyn Fn()>)

Call f whenever a texture, font or model finishes loading (to redraw a scene that isn't animating).

pub fn asset_bounds(&self, g: &Geometry) -> Option<(Vec3, Vec3)>

The local bounds of an object's loaded geometry (a model or text), for hit testing.

pub fn draw_shader(&mut self, spec: &ShaderSpec, w: u32, h: u32, time: f32, mouse: (f32, f32)) -> Result<(), JsValue>

Draw a full-surface shader at time seconds with the pointer at mouse (UV, y up).

pub fn draw_scene(&mut self, scene: &Scene, w: u32, h: u32, time: f32, overrides: Option<&[(Transform, Color)]>) -> Result<(), JsValue>

Draw a scene at time seconds. overrides replaces each object's transform and color (used for eased transitions).

pub fn draw(&mut self, scene: &Scene, width: u32, height: u32)

Draw scene statically (time 0).

pub fn cached_meshes(&self) -> usize

Number of distinct meshes uploaded to the GPU.

pub fn cached_programs(&self) -> usize

Number of compiled programs (mesh, particles, shaders, custom materials).

pub fn read_pixel(&self, x: i32, y: i32, out: &mut [u8; 4]) -> Result<(), JsValue>

Read one RGBA pixel (origin bottom-left) — useful for tests.