diff options
| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | Makefile | 3 | ||||
| -rw-r--r-- | README.md | 1 | ||||
| -rw-r--r-- | src/main.zig | 38 |
4 files changed, 29 insertions, 14 deletions
@@ -1,2 +1,3 @@ /zig-cache /zig-out +/out.ppm @@ -1,6 +1,7 @@ .PHONY: all all: - @zig build run + @rm -f out.ppm + @zig build run > out.ppm .PHONY: fmt fmt: diff --git a/README.md b/README.md new file mode 100644 index 0000000..0331b2f --- /dev/null +++ b/README.md @@ -0,0 +1 @@ +https://raytracing.github.io/books/RayTracingInOneWeekend.html diff --git a/src/main.zig b/src/main.zig index c8a3f67..1f37960 100644 --- a/src/main.zig +++ b/src/main.zig @@ -1,24 +1,36 @@ const std = @import("std"); pub fn main() !void { - // Prints to stderr (it's a shortcut based on `std.io.getStdErr()`) - std.debug.print("All your {s} are belong to us.\n", .{"codebase"}); + // Image + + const image_width = 256; + const image_height = 256; + + // Render - // stdout is for the actual output of your application, for example if you - // are implementing gzip, then only the compressed bytes should be sent to - // stdout, not any debugging messages. const stdout_file = std.io.getStdOut().writer(); var bw = std.io.bufferedWriter(stdout_file); const stdout = bw.writer(); - try stdout.print("Run `zig build test` to run the tests.\n", .{}); + try stdout.print("P3\n{} {}\n255\n", .{ image_width, image_height }); - try bw.flush(); // don't forget to flush! -} + var j: i32 = image_height - 1; + while (j >= 0) { + var i: i32 = 0; + while (i < image_width) { + const r = @intToFloat(f64, i) / (image_width - 1); + const g = @intToFloat(f64, j) / (image_height - 1); + const b = 0.25; + + const ir = @floatToInt(u8, 255.999 * r); + const ig = @floatToInt(u8, 255.999 * g); + const ib = @floatToInt(u8, 255.999 * b); + + try stdout.print("{} {} {}\n", .{ ir, ig, ib }); + i += 1; + } + j -= 1; + } -test "simple test" { - var list = std.ArrayList(i32).init(std.testing.allocator); - defer list.deinit(); // try commenting this out and see if zig detects the memory leak! - try list.append(42); - try std.testing.expectEqual(@as(i32, 42), list.pop()); + try bw.flush(); } |