From f0f185f935efb3fac83e93253cfb659c34448e88 Mon Sep 17 00:00:00 2001
From: Stephen D <webmaster@scd31.com>
Date: Tue, 11 Mar 2025 21:50:40 -0400
Subject: [PATCH] change constants and add math so that we center properly
---
src/main.rs | 21 ++++++++++++---------
1 file changed, 12 insertions(+), 9 deletions(-)
diff --git a/src/main.rs b/src/main.rs
index 52914ba..c1dac89 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,11 +2,11 @@ use anyhow::bail;
use image::{GenericImageView, ImageReader};
const TOAST_TIME_SECONDS: u64 = 60;
-const CENTER_X: u32 = 100;
-const CENTER_Y: u32 = 100;
-const BREAD_HEIGHT: f64 = 15.5;
+const CENTER_X: f64 = 100.0;
+const CENTER_Y: f64 = 100.0;
+const BREAD_HEIGHT: f64 = 15.3;
const IDLE_HEIGHT: f64 = BREAD_HEIGHT + 10.0;
-const PIXEL_SIZE_MM: f64 = 2.0;
+const PIXEL_SIZE_MM: f64 = 4.0;
fn main() -> anyhow::Result<()> {
let img = ImageReader::open("/home/stephen/Downloads/qr_tiny.png")?.decode()?;
@@ -22,7 +22,10 @@ fn main() -> anyhow::Result<()> {
// nothing, for now
}
[255, 255, 255, 255] => {
- toast(x, y);
+ toast(
+ x as f64 - (img.width() as f64 / 2.0),
+ y as f64 - (img.height() as f64 / 2.0),
+ );
}
_ => bail!("Pixel was not entirely black nor entirely white: {:?}", p),
}
@@ -36,15 +39,15 @@ fn preamble() {
println!(
r#"
G28 ; home
-M109 S220 ; heat hotend to 220C and wait
G90 ; absolute positioning
G0 Z{IDLE_HEIGHT}
G0 X{CENTER_X} Y{CENTER_Y}
+M109 S220 ; heat hotend to 220C and wait
"#
);
}
-fn toast(x: u32, y: u32) {
+fn toast(x: f64, y: f64) {
println!(
r#"
G0 X{:.2} Y{:.2};
@@ -52,7 +55,7 @@ G0 Z{BREAD_HEIGHT};
G4 S{TOAST_TIME_SECONDS} ; wait
G0 Z{IDLE_HEIGHT};
"#,
- x as f64 * PIXEL_SIZE_MM,
- y as f64 * PIXEL_SIZE_MM
+ x * PIXEL_SIZE_MM + CENTER_X,
+ y * PIXEL_SIZE_MM + CENTER_Y
);
}
--
GitLab