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https://github.com/RGBCube/DOOM-fire-zig
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This commit is contained in:
Brad Svercl
parent
add37add17
commit
7710413d80
1 changed files with 274 additions and 269 deletions
87
src/main.zig
87
src/main.zig
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@ -60,7 +60,9 @@ pub fn initRNG() !void {
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// print
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pub fn emit(s: []const u8) void {
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const sz = stdout.write(s) catch unreachable;
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if (sz==0) {return;} // cauze I c
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if (sz == 0) {
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return;
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} // cauze I c
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return;
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}
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@ -142,14 +144,14 @@ pub fn initColor() void {
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//get terminal size given a tty
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pub fn getTermSz(tty: std.os.fd_t) !TermSz {
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var winsz = std.os.system.winsize {
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.ws_col=0, .ws_row=0,
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.ws_xpixel=0, .ws_ypixel=0
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};
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var winsz = std.os.system.winsize{ .ws_col = 0, .ws_row = 0, .ws_xpixel = 0, .ws_ypixel = 0 };
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const rv = std.os.system.ioctl(tty, TIOCGWINSZ, @ptrToInt(&winsz));
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const err = std.os.errno(rv);
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if (rv==0) { return TermSz{ .height = winsz.ws_row, .width = winsz.ws_col }; }
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else {return std.os.unexpectedErrno(err);}
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if (rv == 0) {
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return TermSz{ .height = winsz.ws_row, .width = winsz.ws_col };
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} else {
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return std.os.unexpectedErrno(err);
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}
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}
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pub fn initTermSize() !void {
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@ -189,7 +191,6 @@ pub fn pause() void {
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}
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}
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/// Part I - Terminal Size Check
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/// showTermCap() needs about 120x22; if screen is too small, give user a chance to abort and try again.
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///
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@ -204,22 +205,32 @@ pub fn checkTermSz() void {
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var h_ok = true;
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// chk cur < min
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if (term_sz.width<min_w) { w_ok=false; }
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if (term_sz.height<min_h) { h_ok=false; }
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if (term_sz.width < min_w) {
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w_ok = false;
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}
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if (term_sz.height < min_h) {
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h_ok = false;
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}
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if (w_ok and h_ok) { return; }
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else {
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if (w_ok and h_ok) {
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return;
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} else {
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//screen is too small
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//red text
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emit(fg[9]);
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//check conditions
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if (w_ok and !h_ok) { emit_fmt("Screen may be too short - height is {d} and need {d}.",.{term_sz.height, min_h}); }
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else if (!w_ok and h_ok) { emit_fmt("Screen may be too narrow - width is {d} and need {d}.",.{term_sz.width, min_w}); }
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else { emit_fmt("Screen is too small - have {d} x {d} and need {d} x {d}",.{term_sz.width, term_sz.height, min_w, min_h}); }
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if (w_ok and !h_ok) {
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emit_fmt("Screen may be too short - height is {d} and need {d}.", .{ term_sz.height, min_h });
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} else if (!w_ok and h_ok) {
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emit_fmt("Screen may be too narrow - width is {d} and need {d}.", .{ term_sz.width, min_w });
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} else {
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emit_fmt("Screen is too small - have {d} x {d} and need {d} x {d}", .{ term_sz.width, term_sz.height, min_w, min_h });
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}
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emit(nl);emit(nl);
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emit(nl);
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emit(nl);
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//warn user w/white on red
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emit(bg[1]);
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@ -239,12 +250,12 @@ pub fn checkTermSz() void {
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}
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}
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/// Part II - Show terminal capabilities
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///
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/// Since user terminals vary in capabilities, handy to have a screen that renders ACTUAL colors
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/// and exercises various terminal commands prior to DOOM fire.
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///
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pub fn showTermSz() void {
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//todo - show os, os ver, zig ver
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emit_fmt("Screen size: {d}w x {d}h\n\n", .{ term_sz.width, term_sz.height });
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@ -263,7 +274,9 @@ pub fn showStdColors() void {
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while (color_idx < 8) {
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defer color_idx += 1;
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emit(bg[color_idx]);
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if (color_idx==7) { emit(fg[0]); }
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if (color_idx == 7) {
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emit(fg[0]);
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}
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emit_fmt("{u} {d:2} ", .{ sep, color_idx });
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}
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emit(nl);
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@ -273,9 +286,10 @@ pub fn showStdColors() void {
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while (color_idx < 16) {
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defer color_idx += 1;
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emit(bg[color_idx]);
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if (color_idx==15) { emit(fg[0]); }
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if (color_idx == 15) {
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emit(fg[0]);
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}
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emit_fmt("{u} {d:2} ", .{ sep, color_idx });
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}
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emit(nl);
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@ -307,8 +321,7 @@ pub fn show216Colors() void {
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// invert color id for readability
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if (color_idx > 17) {
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fg_idx = 0;
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}
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else {
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} else {
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fg_idx = 15;
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}
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@ -359,15 +372,7 @@ pub fn scrollMarquee() void {
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emit(marquee_bg);
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//quotes - will confirm animations are working on current terminal
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const txt =[_][]const u8{
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" Things move along so rapidly nowadays that people saying "++color_italic++"It can't be done"++color_not_italic++" are always being interrupted",
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" by somebody doing it. "++color_italic++"-- Puck, 1902"++color_not_italic,
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" Test your might!",
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" "++color_italic++"-- Mortal Kombat"++color_not_italic,
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" How much is the fish?",
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" "++color_italic++"-- Scooter"++color_not_italic};
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const txt = [_][]const u8{ " Things move along so rapidly nowadays that people saying " ++ color_italic ++ "It can't be done" ++ color_not_italic ++ " are always being interrupted", " by somebody doing it. " ++ color_italic ++ "-- Puck, 1902" ++ color_not_italic, " Test your might!", " " ++ color_italic ++ "-- Mortal Kombat" ++ color_not_italic, " How much is the fish?", " " ++ color_italic ++ "-- Scooter" ++ color_not_italic };
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const txt_len: u8 = txt.len / 2; // print two rows at a time
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//fade txt in and out
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@ -405,7 +410,6 @@ pub fn scrollMarquee() void {
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//let quote chill for a second
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std.time.sleep(1000 * std.time.ns_per_ms);
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//fade out
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fade_idx = fade_len - 1;
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while (fade_idx > 0) {
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@ -461,7 +465,6 @@ var t_now:i64=0;
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var t_dur: f64 = 0.0;
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var fps: f64 = 0.0;
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pub fn initBuf() void {
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//some lazy guesswork to make sure we have enough of a buffer to render DOOM fire.
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const px_char_sz = px.len;
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@ -501,10 +504,13 @@ pub fn paintBuf() void {
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bs_sz_min = bs_len;
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bs_sz_max = bs_len;
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bs_sz_avg = bs_len;
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} else {
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if (bs_len < bs_sz_min) {
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bs_sz_min = bs_len;
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}
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if (bs_len > bs_sz_max) {
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bs_sz_max = bs_len;
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}
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else {
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if( bs_len < bs_sz_min) { bs_sz_min=bs_len; }
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if( bs_len > bs_sz_max) { bs_sz_max=bs_len; }
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bs_sz_avg = bs_sz_avg * (bs_frame_tic - 1) / bs_frame_tic + bs_len / bs_frame_tic;
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}
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@ -516,8 +522,9 @@ pub fn paintBuf() void {
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}
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// initBuf(); defer freeBuf();
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pub fn freeBuf() void { allocator.free(bs); }
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pub fn freeBuf() void {
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allocator.free(bs);
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}
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pub fn showDoomFire() void {
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//term size => fire size
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@ -605,8 +612,7 @@ pub fn showDoomFire() void {
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//bounds checking
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if ((spread_px == 0) and (doFire_idx >= FIRE_W)) {
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screen_buf[doFire_idx - FIRE_W] = 0;
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}
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else {
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} else {
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spread_rnd_idx = rand.intRangeAtMost(u8, 0, 3);
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if (doFire_idx >= (spread_rnd_idx + 1)) {
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spread_dst = doFire_idx - spread_rnd_idx + 1;
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@ -669,5 +675,4 @@ pub fn main() anyerror!void {
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checkTermSz();
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showTermCap();
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showDoomFire();
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}
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