Struct playdate_controls::peripherals::Accelerometer

pub struct Accelerometer;

Wrapped Accelerometer API.

Implementations

impl Accelerometer

pub fn enable() -> Option<()>

Enable accelerometer only. By default, the accelerometer is disabled to save (a small amount of) power. To use a peripheral, it must first be enabled via this function. Accelerometer data is not available until the next update cycle after it’s enabled.

Uses setPeripheralsEnabled.

Examples found in repository

examples/accelerometer.rs (line 96)

	fn event(&mut self, event: PDSystemEvent) -> Option<()> {
		match event {
			// initial setup
			PDSystemEvent::kEventInit => {
				unsafe { (*(*sys::API).display).setRefreshRate?(20.0) }
				// turn on the accelerometer
				controls::peripherals::Accelerometer::enable()?;
			},
			PDSystemEvent::kEventTerminate => {
				// turn off the accelerometer
				controls::peripherals::Accelerometer::disable()?;
			},
			_ => {},
		}
		Some(())
	}

pub fn disable() -> Option<()>

Uses setPeripheralsEnabled.

⚠️ Disables all peripherals. Currently it doesn’t matter because there’s just one peripheral - accelerometer.

Examples found in repository

examples/accelerometer.rs (line 100)

	fn event(&mut self, event: PDSystemEvent) -> Option<()> {
		match event {
			// initial setup
			PDSystemEvent::kEventInit => {
				unsafe { (*(*sys::API).display).setRefreshRate?(20.0) }
				// turn on the accelerometer
				controls::peripherals::Accelerometer::enable()?;
			},
			PDSystemEvent::kEventTerminate => {
				// turn off the accelerometer
				controls::peripherals::Accelerometer::disable()?;
			},
			_ => {},
		}
		Some(())
	}

pub fn get() -> Option<(c_float, c_float, c_float)>

Uses getAccelerometer.

Returns (x, y, z) accelerometer data.

Examples found in repository

examples/accelerometer.rs (line 41)

	fn update(&mut self) -> Option<()> {
		// get accelerometer data
		let (x, y, z) = controls::peripherals::Accelerometer::get()?;

		unsafe {
			let graphics = (*sys::API).graphics;
			(*graphics).clear?(LCDSolidColor::kColorWhite as LCDColor);

			// render state to string
			let text = format!("[{x:.2},{y:.2},{z:.2}]");
			let c_text = CString::new(text.as_str()).ok()?;
			// get width (screen-size) of text
			let text_width = (*graphics).getTextWidth?(
			                                           core::ptr::null_mut(),
			                                           c_text.as_ptr() as *const _,
			                                           text.len(),
			                                           PDStringEncoding::kUTF8Encoding,
			                                           0,
			);
			// render text
			(*graphics).drawText?(
			                      c_text.as_ptr() as *const _,
			                      text.len(),
			                      PDStringEncoding::kUTF8Encoding,
			                      self.pos.x,
			                      self.pos.y,
			);

			// update label position
			self.pos.x = (LCD_COLUMNS as f32 * x) as _;
			self.pos.y = (LCD_ROWS as f32 * y) as _;

			// check screen boundaries
			if self.pos.x < 0 {
				self.pos.x = 0
			} else if self.pos.x > LCD_COLUMNS as i32 - text_width {
				self.pos.x = LCD_COLUMNS as i32 - text_width
			}
			if self.pos.y < 0 {
				self.pos.y = 0
			} else if self.pos.y > LCD_ROWS as i32 - TEXT_HEIGHT as i32 {
				self.pos.y = LCD_ROWS as i32 - TEXT_HEIGHT as i32
			}

			(*(*sys::API).system).drawFPS?(0, 0);
			Some(())
		}
	}

pub fn get_to( outx: &mut c_float, outy: &mut c_float, outz: &mut c_float ) -> Option<()>

Gets accelerometer data directly to x, y and z.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size:0 bytes