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这些天想了想怎么给LCD做丝滑的动画,稍微想了想,便有了下面这些代码。$ r8 t/ ?% s! X& ]1 k
- importPackage (java.lang);
) }9 L3 t" F$ }( q' S4 j# f - importPackage (java.awt);/ P& u1 ?! T$ Z. g) \
2 d8 b" [2 D) d3 d+ l8 K5 |6 V- include(Resources.id("mtrsteamloco:library/code/face.js"));6 ]4 l2 _6 t7 e6 }/ e. k; J6 h/ q( R
: n( L9 p- [2 }; h- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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9 b. p' k0 c+ `+ d- function getW(str, font) {% Y9 y8 C" R' V- R: A
- let frc = Resources.getFontRenderContext();$ M; r4 ?4 m: x4 s6 T
- bounds = font.getStringBounds(str, frc);
. ^1 n$ j! c- _$ t# Y/ o1 @6 t* | - return Math.ceil(bounds.getWidth());4 M4 T2 C, q( N3 n9 t+ l
- }5 N" o0 h" C! _4 A" y4 Q
- . s3 s1 M( F0 H. l
- da = (g) => {//底图绘制* l/ ?$ n Q" i% C9 [
- g.setColor(Color.BLACK);7 E" n. m! i; E. w/ A2 K9 J- d
- g.fillRect(0, 0, 400, 400);
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- db = (g) => {//上层绘制
) f" w; ~; m) a# l. c5 P3 x+ Z - g.setColor(Color.WHITE);* R& ~5 w7 H; Z1 q
- g.fillRect(0, 0, 400, 400); y" ?+ R' z% n' p2 s# |# A
- g.setColor(Color.RED);
# O! p: b& K' ~5 D - g.setFont(font0);; Y" \3 t2 b. ~4 M0 Q9 ~
- let str = "晴纱是男娘";
/ I0 {6 {) b" t' z - let ww = 400;1 ]$ b f( d. D
- let w = getW(str, font0);
$ Z' O3 t& Q: r, ` - g.drawString(str, ww / 2 - w / 2, 200);" P$ R" _4 N9 Q9 W2 i
- }
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: A/ K) w; L# k" }& n" b- const mat = new Matrices();
1 d+ ~5 k# e2 g3 w$ K7 i - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
+ }- v& I: Y6 y& U" g! u( e - let info = {
/ Y5 {& s: o* G) ^( W8 G3 L - ctx: ctx,
5 B5 W- Y% ]% E d$ |/ k+ V- G6 E5 ] - isTrain: false,- c" W4 ]1 l' _8 [# d
- matrices: [mat],
8 w( v7 A* i: j" @- Q: d - texture: [400, 400],4 b4 D; L: p- y0 ], c
- model: {) P1 Q1 S- b5 r6 v8 R
- renderType: "light",) z2 \- z" W8 x( x
- size: [1, 1],
6 J; C) u& z9 f# ~7 U - uvSize: [1, 1]
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- }
4 @. o" Z7 o( z$ E& T - let f = new Face(info);
6 q3 c9 u2 `* j- x8 R8 N9 D) B - state.f = f;
' m3 E: X w1 I# r - ; y0 C5 S2 H* E3 H% K* }' B
- let t = f.texture;
/ c4 F! ?2 L( x' `$ k2 W4 k" H* C5 R( G - let g = t.graphics;
+ l5 K* |: H% r ~2 I% ` v - state.running = true;( v T7 \& `) V) L" o- Z
- let fps = 24;2 U) K2 w) h8 l: @0 E
- da(g);//绘制底图2 R' O( E0 u/ w0 y1 k. O
- t.upload();# L/ q6 j, w2 [+ t+ F' |# Y4 w
- let k = 0;4 [2 l( p2 M z% m- b: o, L
- let ti = Date.now();2 ^# t: p* i9 }8 ~4 i" k
- let rt = 0;) W/ Z3 @, W' Y) b4 v
- smooth = (k, v) => {// 平滑变化
3 n- M& P0 H! E3 V) G+ f - if (v > k) return k;
( |4 Q9 K [7 S. U: w$ y4 T - if (k < 0) return 0;0 J5 M8 v; `7 ]& x/ ], G. g, B6 J
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程& U7 q- d( O: [1 g7 ` U* J/ ?
- let id = Thread.currentThread().getId();
- O% x# P+ t1 x1 i* {& J3 J' J3 f$ Z - print("Thread start:" + id);- a; c0 P. D+ Z( `/ ~/ k2 n
- while (state.running) {( l8 A# u) P: R9 Y! b
- try {
6 Z) o8 s7 O/ ^( F Q. R4 e: f/ U - k += (Date.now() - ti) / 1000 * 0.2;3 }" {. w# @9 C2 {+ ~
- ti = Date.now();
- f5 w9 m6 r1 o) W. F! b - if (k > 1.5) {' `8 D3 T2 F7 z' E& N% f
- k = 0;
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- setComp(g, 1);
7 O) F0 D: [) u5 |& @# Q* _) {+ N - da(g);
( m9 E" x- b! B9 W' Q. r - let kk = smooth(1, k);//平滑切换透明度3 n1 X" H3 G& }7 t3 x
- setComp(g, kk);( ?1 j6 g! |* @: O) ~% ^8 d' E
- db(g);
. S2 Q9 e/ \% G5 [ - t.upload();
+ S) s# L+ n* Y6 E Z - ctx.setDebugInfo("rt" ,Date.now() - ti);0 k0 E1 f, X7 a% i1 _4 P5 U" ]4 N
- ctx.setDebugInfo("k", k);
4 h3 h! `9 I7 ^( n' U - ctx.setDebugInfo("sm", kk);
; @- O Y7 X- q. a1 W - rt = Date.now() - ti;
4 z8 J6 F& p2 R3 f. l" s - Thread.sleep(ck(rt - 1000 / fps));0 c3 A% v, j' _/ e, d
- ctx.setDebugInfo("error", 0)$ z5 j# i( p# f6 j7 p# {! t
- } catch (e) {$ R, C& g( g7 u* I: A! l
- ctx.setDebugInfo("error", e);
/ }3 o: E8 p3 g, s, U" N/ A - }
. ^* I9 w7 n: ^2 T; Y- B0 C; S - }' c8 x4 o V/ w9 z
- print("Thread end:" + id);; c m* e, [$ K2 ]% N2 S7 i
- }
6 u8 H2 E, s9 S' V4 { - let th = new Thread(run, "qiehuan");
1 _) J0 Z# u+ K1 N$ e& [ - th.start();" E! v6 J0 X* l4 B( Q
- }
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( K. K( `" D5 r9 t9 A9 d' u- function render(ctx, state, entity) {; [ o1 j4 |1 D( h
- state.f.tick();
+ z8 H$ ^5 C6 p& e- c6 x* v3 i' b - } v" B$ G- C' |
6 ]* h2 U% o( R# Y4 ?- function dispose(ctx, state, entity) {
" ^1 g6 l l4 A4 U% t5 n( z$ r - print("Dispose");
" p/ n Q* q! w) a! l7 c - state.running = false;
) C" ^# V- r( e1 y9 _ - state.f.close();
' t* O6 R( o/ y- b/ y& a8 E6 o - }* B: Z" e B8 J9 B( }9 V% d) d
2 E+ E. ~7 R# S- function setComp(g, value) {
6 y* y/ M- l7 U; W- V - g.setComposite(AlphaComposite.SrcOver.derive(value));
1 Q! ?* h4 l- [- ]) j - }
复制代码 . l1 O8 C1 ~* ?7 s5 d# O9 Z
写了这么久的js,我便渐渐发觉使用 render 来写更新内容有局限性,比如说会拉高延迟.....等等(但可能也没什么影响?)。在这里我用新建 Thread (线程) 然后在新的 Thread 里来处理图片更新逻辑,实现丝滑切换。) R O1 r# j' T$ F
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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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