5 files changed, 9 insertions, 9 deletions
diff --git a/src/rtw/hittable.zig b/src/rtw/hittable.zig
index 3945192..c47d9ff 100644
--- a/src/rtw/hittable.zig
+++ b/src/rtw/hittable.zig
@@ -164,7 +164,7 @@ const Sphere = struct {
     }
 
     fn getSphereUv(p: Point3, u: *f64, v: *f64) void {
-        const phi = math.atan2(f64, -p.z, p.x) + pi;
+        const phi = math.atan2(-p.z, p.x) + pi;
         const theta = math.acos(-p.y);
         u.* = phi / (2.0 * pi);
         v.* = theta / pi;
@@ -303,7 +303,7 @@ const BvhNode = struct {
         var left: *Hittable = undefined;
         var right: *Hittable = undefined;
 
-        var objects_ = objects;
+        const objects_ = objects;
         const axis = randomInt(u8, 0, 3);
 
         const object_span = end - start;
@@ -325,8 +325,8 @@ const BvhNode = struct {
             right.* = .{ .bvhNode = BvhNode.init(objects, mid, end, time0, time1) };
         }
 
-        var box_left: Aabb = undefined;
-        var box_right: Aabb = undefined;
+        const box_left: Aabb = undefined;
+        const box_right: Aabb = undefined;
 
         if (!left.boudingBox(time0, time1, box_left) || !right.boudingBox(time0, time1, box_right)) {
             // ERROR
diff --git a/src/rtw/material.zig b/src/rtw/material.zig
index 311e5af..c1f33ee 100644
--- a/src/rtw/material.zig
+++ b/src/rtw/material.zig
@@ -125,6 +125,6 @@ fn reflect(v: Vec3, n: Vec3) Vec3 {
 fn refract(uv: Vec3, n: Vec3, etai_over_etat: f64) Vec3 {
     const cos_theta = @min(uv.mul(-1.0).dot(n), 1.0);
     const r_out_perpendicular = uv.add(n.mul(cos_theta)).mul(etai_over_etat);
-    const r_out_parallel = n.mul(-@sqrt(@fabs(1.0 - r_out_perpendicular.normSquared())));
+    const r_out_parallel = n.mul(-@sqrt(@abs(1.0 - r_out_perpendicular.normSquared())));
     return r_out_perpendicular.add(r_out_parallel);
 }
diff --git a/src/rtw/perlin.zig b/src/rtw/perlin.zig
index 39173cd..77a075d 100644
--- a/src/rtw/perlin.zig
+++ b/src/rtw/perlin.zig
@@ -88,7 +88,7 @@ pub const Perlin = struct {
             weight *= 0.5;
             p_ = p_.mul(2.0);
         }
-        return @fabs(accum);
+        return @abs(accum);
     }
 
     fn permute(rng: Random, p: []usize, n: usize) void {
diff --git a/src/rtw/texture.zig b/src/rtw/texture.zig
index 4095a9c..ff17579 100644
--- a/src/rtw/texture.zig
+++ b/src/rtw/texture.zig
@@ -67,8 +67,8 @@ pub const CheckerTexture = struct {
     even: *const Texture,
 
     fn init(allocator: std.mem.Allocator, odd: Texture, even: Texture) !CheckerTexture {
-        var odd_ = try allocator.create(Texture);
-        var even_ = try allocator.create(Texture);
+        const odd_ = try allocator.create(Texture);
+        const even_ = try allocator.create(Texture);
         odd_.* = odd;
         even_.* = even;
         return .{
diff --git a/src/rtw/vec.zig b/src/rtw/vec.zig
index 9b2c3f0..74864f1 100644
--- a/src/rtw/vec.zig
+++ b/src/rtw/vec.zig
@@ -97,7 +97,7 @@ pub const Vec3 = struct {
 
     pub fn near_zero(v: Vec3) bool {
         const epsilon = 1e-8;
-        return @fabs(v.x) < epsilon and @fabs(v.y) < epsilon and @fabs(v.z) < epsilon;
+        return @abs(v.x) < epsilon and @abs(v.y) < epsilon and @abs(v.z) < epsilon;
     }
 };