no worky but will be faster if worky

src/locate_light.rs

@@ -0,0 +1,44 @@
+use nokhwa::{utils::FrameFormat, Camera, NokhwaError};
+
+#[derive(Debug)]
+pub enum LocatingError {
+    NokhwaError(NokhwaError),
+    FormatError,
+}
+
+pub fn locate_light(camera: &mut Camera) -> Result<(u32, u32), LocatingError> {
+    let buffer = match camera.frame() {
+        Ok(frame) => Ok(frame),
+        Err(err) => Err(LocatingError::NokhwaError(err)),
+    }?;
+
+    if buffer.source_frame_format() != FrameFormat::MJPEG {
+        return Err(LocatingError::FormatError);
+    }
+
+    let width = buffer.resolution().width();
+    let height = buffer.resolution().height();
+    let buffer = buffer.buffer();
+    let stride = width * 3;
+
+    let mut avg = (0, 0);
+    let mut n = 0;
+
+    for j in 0..height {
+        for i in 0..width {
+            let first_u8 = (i + j * stride) as usize;
+            if buffer[first_u8] as u32 + buffer[first_u8 + 1] as u32 + buffer[first_u8 + 2] as u32
+                > 250 * 3
+            {
+                avg.0 += i;
+                avg.1 += j;
+                n += 1;
+            }
+        }
+    }
+
+    avg.0 /= n;
+    avg.1 /= n;
+
+    Ok(avg)
+}

src/main.rs

@@ -1,10 +1,14 @@
+mod locate_light;
+
 use nokhwa::{
     pixel_format::RgbFormat,
-    utils::{CameraIndex, RequestedFormat, RequestedFormatType},
+    utils::{CameraIndex, FrameFormat, RequestedFormat, RequestedFormatType},
-    Camera,
+    Camera, NokhwaError,
 };
 
-use image::{DynamicImage, GenericImage, GenericImageView, Rgb, Rgba};
+use locate_light::locate_light;
+
+use image::{DynamicImage, GenericImage, GenericImageView, ImageBuffer, Rgb, Rgba};
 
 use eframe::egui;
 
@@ -21,34 +25,5 @@ fn main() {
 
     camera.open_stream();
 
-    // get a frame
+    locate_light(&mut camera).unwrap();
-    let frame = camera.frame().unwrap();
-    println!("Captured Single Frame of {}", frame.buffer().len());
-    // decode into an ImageBuffer
-    let decoded = frame.decode_image::<RgbFormat>().unwrap();
-    let mut img = DynamicImage::from(decoded);
-
-    let mut bright_spots: Vec<(u32, u32)> = vec![];
-
-    for (i, j, pxl) in img.pixels() {
-        let sum = pxl.0[0] as u32 + pxl.0[1] as u32 + pxl.0[2] as u32;
-        if sum > 250 * 3 {
-            bright_spots.push((i, j));
-        }
-    }
-
-    let mut sum = [0, 0];
-    let n = bright_spots.len();
-
-    for (i, j) in bright_spots {
-        sum[0] += i;
-        sum[1] += j;
-    }
-
-    sum[0] /= n as u32;
-    sum[1] /= n as u32;
-
-    img.put_pixel(sum[0], sum[1], Rgba(RED));
-
-    img.save("test.png");
 }