move to file

1 files changed, 25 insertions, 0 deletions

diff --git a/src/vec.zig b/src/vec.zig
new file mode 100644
index 0000000..cc245a4
--- /dev/null
+++ b/src/vec.zig
@@ -0,0 +1,25 @@
+pub const vec = @Vector(3, f32);
+
+pub fn init(x: f32, y: f32, z: f32) vec {
+    return @Vector(3, f32){ x, y, z };
+}
+
+pub fn scalar(x: f32) vec {
+    return @splat(3, x);
+}
+
+pub fn unit_vector(v: vec) vec {
+    return v / scalar(length(v));
+}
+
+pub fn length_squared(v: vec) f32 {
+    return v[0] * v[0] + v[1] * v[1] + v[2] * v[2];
+}
+
+pub fn length(v: vec) f32 {
+    return @sqrt(length_squared(v));
+}
+
+pub fn dot(x: vec, y: vec) f32 {
+    return x[0] * y[0] + x[1] * y[1] + x[2] * y[2];
+}