Add format function for vector and matrix types.

src/math/mat.zig

@@ -1,3 +1,5 @@
+const std = @import("std");
+
 const mach = @import("../main.zig");
 const testing = mach.testing;
 const math = mach.math;
@@ -118,6 +120,7 @@ pub fn Mat2x2(
 
         pub const mul = Shared.mul;
         pub const mulVec = Shared.mulVec;
+        pub const format = Shared.format;
     };
 }
 
@@ -258,6 +261,7 @@ pub fn Mat3x3(
 
         pub const mul = Shared.mul;
         pub const mulVec = Shared.mulVec;
+        pub const format = Shared.format;
     };
 }
 
@@ -485,6 +489,7 @@ pub fn Mat4x4(
         pub const mulVec = Shared.mulVec;
         pub const eql = Shared.eql;
         pub const eqlApprox = Shared.eqlApprox;
+        pub const format = Shared.format;
     };
 }
 
@@ -542,6 +547,24 @@ pub fn MatShared(comptime RowVec: type, comptime ColVec: type, comptime Matrix:
             }
             return true;
         }
+
+        /// Custom format function for all matrix types.
+        pub inline fn format(
+            self: Matrix,
+            comptime fmt: []const u8,
+            options: std.fmt.FormatOptions,
+            writer: anytype,
+        ) @TypeOf(writer).Error!void {
+            const rows = @TypeOf(self).rows;
+            try writer.print("{{", .{});
+            inline for (0..rows) |r| {
+                try std.fmt.formatType(self.row(r), fmt, options, writer, 1);
+                if (r < rows - 1) {
+                    try writer.print(", ", .{});
+                }
+            }
+            try writer.print("}}", .{});
+        }
     };
 }
 

src/math/vec.zig

@@ -67,6 +67,7 @@ pub fn Vec2(comptime Scalar: type) type {
         pub const minScalar = Shared.minScalar;
         pub const eqlApprox = Shared.eqlApprox;
         pub const eql = Shared.eql;
+        pub const format = Shared.format;
     };
 }
 
@@ -190,6 +191,7 @@ pub fn Vec3(comptime Scalar: type) type {
         pub const minScalar = Shared.minScalar;
         pub const eqlApprox = Shared.eqlApprox;
         pub const eql = Shared.eql;
+        pub const format = Shared.format;
     };
 }
 
@@ -269,6 +271,7 @@ pub fn Vec4(comptime Scalar: type) type {
         pub const minScalar = Shared.minScalar;
         pub const eqlApprox = Shared.eqlApprox;
         pub const eql = Shared.eql;
+        pub const format = Shared.format;
     };
 }
 
@@ -519,6 +522,16 @@ pub fn VecShared(comptime Scalar: type, comptime VecN: type) type {
         pub inline fn eql(a: *const VecN, b: *const VecN) bool {
             return a.eqlApprox(b, math.eps(Scalar));
         }
+
+        /// Custom format function for all vector types.
+        pub inline fn format(
+            self: VecN,
+            comptime fmt: []const u8,
+            options: std.fmt.FormatOptions,
+            writer: anytype,
+        ) @TypeOf(writer).Error!void {
+            try std.fmt.formatType(self.v, fmt, options, writer, 1);
+        }
     };
 }