init

3 files changed, 47 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..b71bd93
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "tracer"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..06f041c
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,40 @@
+use std::fs::File;
+use std::io::Write;
+
+const IMG_WIDTH: usize = 256;
+const IMG_HEIGHT: usize = 256;
+
+struct Pixel {
+    r: u8,
+    g: u8,
+    b: u8,
+}
+
+fn main() {
+    let mut txt_data = String::from("P3\n");
+    txt_data.push_str(format!("{} {}\n255\n", IMG_WIDTH, IMG_HEIGHT).as_str());
+
+    (0..IMG_HEIGHT).for_each(|j| {
+        (0..IMG_WIDTH).for_each(|i| {
+            let r = i as f32 / IMG_WIDTH as f32;
+            let g = j as f32 / IMG_HEIGHT as f32;
+            let b = 0.0f32;
+
+            let ir = (255.999 * r) as u8;
+            let ig = (255.999 * g) as u8;
+            let ib = (255.999 * b) as u8;
+
+            txt_data.push_str(&format!("{} {} {}\n", ir, ig, ib));
+        })
+    });
+
+    match write_file("output.ppm", txt_data.as_str()) {
+        Ok(_) => {println!("PPM file writen")},
+        Err(e) => {println!("Error writing file {}", e)}
+    }
+}
+
+fn write_file(file_path:  &str, txt_data:  &str) -> Result<(), std::io::Error> {
+    let mut file = File::create(file_path)?;
+    file.write_all(txt_data.as_bytes())
+}