diff options
Diffstat (limited to 'webhogg/wasm/src/context/graphics.rs')
| -rw-r--r-- | webhogg/wasm/src/context/graphics.rs | 29 |
1 files changed, 20 insertions, 9 deletions
diff --git a/webhogg/wasm/src/context/graphics.rs b/webhogg/wasm/src/context/graphics.rs index 853e1e1..b94441d 100644 --- a/webhogg/wasm/src/context/graphics.rs +++ b/webhogg/wasm/src/context/graphics.rs @@ -4,16 +4,12 @@ use wasm_bindgen::JsCast; use web_sys::WebGl2RenderingContext as Gl; pub struct GraphicsContext { + gl: Gl, + frame_nr: u64, } impl GraphicsContext { pub fn from_canvas(canvas: web_sys::OffscreenCanvas) -> Result<Self, WasmError> { - /*debug!("canvas object usw.: {:?}", canvas); - let canvas: web_sys::OffscreenCanvas = js_sys::Reflect::get(&canvas, - &wasm_bindgen::JsValue::from_str("canvas")) - .map_err(|_| WasmError::WebGl2ContextCreation( - format!("canvas object is not defined")))? - .into();*/ let context = canvas.get_context("webgl2") .map_err(|_| WasmError::WebGl2ContextCreation( format!("context cration failed: getContext returned an exception")))? @@ -23,11 +19,26 @@ impl GraphicsContext { .dyn_into::<Gl>() .map_err(|_| WasmError::WebGl2ContextCreation( format!("context object is not a context")))?; - - context.clear_color(0.6, 0.0, 0.6, 1.0); - context.clear(Gl::COLOR_BUFFER_BIT); Ok(Self { + gl: context, + frame_nr: 0, }) } + + pub fn update(&mut self) -> Result<(), WasmError> { + let light = 0.5; + + let a = (self.frame_nr as f32) / 60.0; + let a = f32::abs(f32::sin(a)); + let b = f32::abs(f32::cos(a)); + let (a, b) = (a * light, b * light); + + self.gl.clear_color(a, light - a, b, 1.0); + self.gl.clear(Gl::COLOR_BUFFER_BIT); + + self.frame_nr += 1; + + Ok(()) + } } |