stash

src/main.rs

@@ -11,6 +11,26 @@ mod point;
 mod ray;
 
 fn main() {
+    gen_gradient_ppm();
+    println!("==================================");
+    ray_scene_render();
+}
+
+
+fn ray_scene_render() {
+    let aspect_ratio = 16.0/9.0;
+    let image_width = 400;
+    // aleast 1px
+    let image_height = ((image_width as f32 / aspect_ratio) as i32).max(1);
+
+    let viewport_height = 2.0;
+    let viewport_width = viewport_height * (image_width as f32 / image_height as f32);
+
+    println!("set image({},{}), viewport({},{})", image_width, image_height, viewport_width, viewport_height)
+}
+
+
+fn gen_gradient_ppm() {
     let ppm_content = gen_gradient_ppm_p3(400, 225);
 
     let v1 = Vec3::new(1.0, 1.0, 1.0);

src/vec3.rs

@@ -1,5 +1,5 @@
 
-use std::{fmt::Display, ops::{Add, AddAssign, Div, DivAssign, Mul, MulAssign, Neg, Sub, SubAssign}};
+use std::{fmt::Display, ops::{Add, AddAssign, Div, Mul, MulAssign, Sub}};
 use std::fmt;
 /*
 * [3]
@@ -35,11 +35,6 @@ impl Vec3 {
             z: self.x * other.y - self.y * other.x,
         }
     }
-
-    /// 向量长度
-    fn magnitude(self) -> f32 {
-        (self.x.powi(2) + self.y.powi(2) + self.z.powi(2)).sqrt()
-    }
 }
 
 impl Add for Vec3 {