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start implementing a pacman-like game in zig

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This commit is contained in:
Dennis Ranke
2023-04-10 13:26:58 +02:00
parent 1a06ebbc95
commit 3424976d40
7 changed files with 148 additions and 8 deletions
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31
examples/zig/tunnel/build.zig Normal file
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const std = @import("std");
pub fn build(b: *std.build.Builder) void {
const mode = std.builtin.Mode.ReleaseSmall;
const lib = b.addSharedLibrary("cart", "main.zig", .unversioned);
lib.setBuildMode(mode);
lib.setTarget(.{ .cpu_arch = .wasm32, .os_tag = .freestanding, .cpu_features_add = std.Target.wasm.featureSet(&.{.nontrapping_fptoint}) });
lib.import_memory = true;
lib.initial_memory = 262144;
lib.max_memory = 262144;
lib.global_base = 81920;
lib.stack_size = 8192;
lib.install();
if (lib.install_step) |install_step| {
const run_filter_exports = b.addSystemCommand(&[_][]const u8{ "uw8", "filter-exports", "zig-out/lib/cart.wasm", "zig-out/lib/cart-filtered.wasm" });
run_filter_exports.step.dependOn(&install_step.step);
const run_wasm_opt = b.addSystemCommand(&[_][]const u8{ "wasm-opt", "--enable-nontrapping-float-to-int", "-Oz", "-o", "zig-out/cart.wasm", "zig-out/lib/cart-filtered.wasm" });
run_wasm_opt.step.dependOn(&run_filter_exports.step);
const run_uw8_pack = b.addSystemCommand(&[_][]const u8{ "uw8", "pack", "-l", "9", "zig-out/cart.wasm", "zig-out/cart.uw8" });
run_uw8_pack.step.dependOn(&run_wasm_opt.step);
const make_opt = b.step("make_opt", "make size optimized cart");
make_opt.dependOn(&run_uw8_pack.step);
b.default_step = make_opt;
}
}

22
examples/zig/tunnel/main.zig Normal file
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extern fn atan2(x: f32, y: f32) f32;
extern fn time() f32;
pub const FRAMEBUFFER: *[320 * 240]u8 = @intToPtr(*[320 * 240]u8, 120);
export fn upd() void {
var i: u32 = 0;
while (true) {
var t = time() * 63.0;
var x = @intToFloat(f32, (@intCast(i32, i % 320) - 160));
var y = @intToFloat(f32, (@intCast(i32, i / 320) - 120));
var d = 40000.0 / @sqrt(x * x + y * y);
var u = atan2(x, y) * 512.0 / 3.141;
var c = @intCast(u8, (@floatToInt(i32, d + t * 2.0) ^ @floatToInt(i32, u + t)) & 255) >> 4;
FRAMEBUFFER[i] = c;
i += 1;
if (i >= 320 * 240) {
break;
}
}
}