3.3

1 files changed, 25 insertions, 11 deletions

diff --git a/src/main.zig b/src/main.zig
index 9983774..2d42772 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -1,23 +1,37 @@
 const std = @import("std");
+const warn = @import("std").debug.print;
+
+pub fn write_color(stdout: anytype, v: vec) !void {
+    const r = @floatToInt(usize, v[0] * 255.999);
+    const g = @floatToInt(usize, v[1] * 255.999);
+    const b = @floatToInt(usize, v[2] * 255.999);
+    try stdout.print("{} {} {}\n", .{ r, g, b });
+}
+
+const vec = @Vector(3, f32);
 
 pub fn main() !void {
-    const width = 256;
-    const height = 256;
-    std.debug.print("P3\n{} {}\n255\n", .{ width, height });
+    const width = 512;
+    const height = 512;
+    const stdout_file = std.io.getStdOut().writer();
+    var bw = std.io.bufferedWriter(stdout_file);
+    const stdout = bw.writer();
+
+    try stdout.print("P3\n{} {}\n255\n", .{ width, height });
 
     var j: usize = height;
     while (j > 0) : (j -= 1) {
+        warn("remaining: {}\n", .{j});
         var i: usize = 0;
         while (i < width) : (i += 1) {
-            var r: f32 = @intToFloat(f32, i) / (width - 1);
-            var g: f32 = @intToFloat(f32, j) / (height - 1);
-            var b: f32 = 0.25;
-
-            var ir: usize = @floatToInt(usize, r * 255.999);
-            var ig: usize = @floatToInt(usize, g * 255.999);
-            var ib: usize = @floatToInt(usize, b * 255.999);
+            var color = vec{
+                @intToFloat(f32, i) / (width - 1),
+                @intToFloat(f32, j) / (height - 1),
+                0.25,
+            };
 
-            std.debug.print("{} {} {}\n", .{ ir, ig, ib });
+            try write_color(stdout, color);
         }
     }
+    try bw.flush();
 }