From 8296be848319eecd43f94900d4d12414ec189166 Mon Sep 17 00:00:00 2001
From: Julian T <julian@jtle.dk>
Date: Wed, 3 Feb 2021 15:34:17 +0100
Subject: Add simple perspective camera

---
 src/core/vector3.rs | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

(limited to 'src/core/vector3.rs')

diff --git a/src/core/vector3.rs b/src/core/vector3.rs
index 915765d..6f4d6ab 100644
--- a/src/core/vector3.rs
+++ b/src/core/vector3.rs
@@ -2,7 +2,8 @@
 //!
 //! Also add more 3d math things needed for shading and 3d calculations.
 use crate::{Float, Number};
-use std::ops::{Sub, Add, DivAssign};
+use std::ops::{Mul, Sub, Add, DivAssign};
+use std::fmt;
 
 #[derive(Clone, Copy)]
 pub struct Vector3<T: Number> {
@@ -49,6 +50,17 @@ impl<T: Number> Add for Vector3<T> {
     }
 }
 
+impl<T: Number> Mul<T> for Vector3<T> {
+    type Output = Self;
+    fn mul(self, op: T) -> Self::Output {
+        Self::Output::new_xyz(
+            self.x * op,
+            self.y * op,
+            self.z * op,
+            )
+    }
+}
+
 impl<T: Number> DivAssign<T> for Vector3<T> {
     fn div_assign(&mut self, op: T) {
         self.x /= op;
@@ -57,6 +69,12 @@ impl<T: Number> DivAssign<T> for Vector3<T> {
     }
 }
 
+impl<T: Number> fmt::Display for Vector3<T> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.write_fmt(format_args!("[{}, {}, {}]", self.x, self.y, self.z))
+    }
+}
+
 impl Vector3f {
     /// Calculates the length times itself
     ///
@@ -97,4 +115,13 @@ impl Vector3f {
         new.norm_in();
         new
     }
+
+    pub fn cross(&self, op: &Self) -> Self {
+        Self::new_xyz(
+            self.y * op.z - self.z * op.y,
+            self.z * op.x - self.x * op.z,
+            self.x * op.y - self.y * op.x,
+            )
+
+    }
 }
-- 
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