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" b, v3 z# U2 I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。8 k/ ^4 Y3 y; K7 a6 \- D
- importPackage (java.lang);* n, X- w/ U! ]5 I9 L
- importPackage (java.awt);
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7 U3 M; H! E5 J; M4 I" v& c0 E9 U- include(Resources.id("mtrsteamloco:library/code/face.js"));$ y1 l) b* E0 ~; `2 q; f
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);: ^! t, M, v6 o s
; E. U% B& V1 a- function getW(str, font) {" }- @ Q# w- R0 }6 w8 b
- let frc = Resources.getFontRenderContext();0 h, z7 W& k7 f. b2 z) b
- bounds = font.getStringBounds(str, frc);* q& t9 a; Z% _7 y/ }. ~
- return Math.ceil(bounds.getWidth());
- f9 Y( X* e {, @ C6 O: g& W - }
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{0 }6 \3 v, V" |, X9 H/ B8 u- da = (g) => {//底图绘制
2 V, |& j( f4 l2 H; T" Q: @ - g.setColor(Color.BLACK);
0 i) z7 s b8 A* a - g.fillRect(0, 0, 400, 400);+ ?. o0 }3 n5 P& K% M1 v- P0 O& C
- }* ~8 q2 n- ? F1 J3 D' V
; s% v9 d7 k& z" I' q- db = (g) => {//上层绘制
0 S. _6 q7 r* w% l, U; }- \ - g.setColor(Color.WHITE);; Y+ q/ q2 U# ~( x) t
- g.fillRect(0, 0, 400, 400);) a9 `7 j, g9 u% |
- g.setColor(Color.RED);' K4 m2 _" N& K( X
- g.setFont(font0);) d3 E( c8 A* K- F+ d& @
- let str = "晴纱是男娘";
+ Z0 S: v! r0 v - let ww = 400;) N. ~* |3 A2 U6 A/ s7 J
- let w = getW(str, font0);
- Z: Y' M* ]2 L. l - g.drawString(str, ww / 2 - w / 2, 200);
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- ' }7 _; x$ R" z* p
- const mat = new Matrices();
$ A p' A' C- L4 u% L: C - mat.translate(0, 0.5, 0);( _" S9 ?- w; u) I* g
) S- D8 B. S+ r; r R- function create(ctx, state, entity) {
. H2 T) O& ?, { - let info = {. P5 M' b5 l: n: e
- ctx: ctx,) } V& [& N9 ]. j/ ^) G. L3 @0 z
- isTrain: false,
$ S9 Y2 f6 w+ m% U i0 H. G - matrices: [mat],
h% z. y: O7 H( u - texture: [400, 400],
0 ?/ p* W, E( |# F: {0 R3 h: f" v4 o! Z - model: {6 g. g$ A% I" ?% u4 F2 X1 O; \- |
- renderType: "light",
5 e4 h& D ~* [! I; b4 \' ~ - size: [1, 1],0 C9 U5 T' p5 ~* m* L
- uvSize: [1, 1]
6 p: G9 m5 G8 p- e# Y9 | - }
3 o& t, z5 f' K1 O- a* K4 U0 ~ - }
- ~# R' ?3 ?! `4 _ - let f = new Face(info);- Y# B3 F/ H- p, R
- state.f = f;7 A. ~+ D3 w- \; L
|, F( [' n6 m$ Y8 a+ y7 Q& m- let t = f.texture;% e; @8 i, n6 @) D. M4 w! I
- let g = t.graphics;
9 }2 J+ E2 h* A, f - state.running = true;
7 w# C+ |& X; n5 I9 F* `$ ~5 | - let fps = 24;5 b8 k+ ]% \$ }9 }
- da(g);//绘制底图2 z: S/ O; d1 d( G+ ]% i
- t.upload();
4 N# `) \6 `# {3 J; C. p- e' o - let k = 0;
# b. `1 F0 u" u1 I- V - let ti = Date.now();
* Y& D- {" P! S9 k# ?3 g - let rt = 0;6 o/ I& g) t X1 ^0 r. ?5 t
- smooth = (k, v) => {// 平滑变化9 m, N2 b( d: Z6 d l
- if (v > k) return k;" d8 T" T+ ]+ j+ |; U! R& b7 C; B
- if (k < 0) return 0;4 {) R q9 x2 V& O1 e+ y- i" F; z% N9 b" i- f
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
6 }. Q4 C" u5 t* r - }
# g" ?" T: y3 O% b y ^7 N - run = () => {// 新线程+ ~& Z+ M1 Y' K2 v9 l
- let id = Thread.currentThread().getId();
, ], ?- Q( x8 f4 w0 P; N: h: ?6 y; i - print("Thread start:" + id);
; t6 R' g) { a8 D# \ - while (state.running) {, `) v* R) k2 q1 { {1 R0 N5 G
- try {
" Z9 V2 q( z9 D; P& R* n# H& I - k += (Date.now() - ti) / 1000 * 0.2;- a( ?7 |* @7 L; N' o9 L9 [
- ti = Date.now();+ X& Y: }! C6 k- M2 P9 A/ A: g h
- if (k > 1.5) { c6 C, u! C h% S. d' D% r9 Y
- k = 0;
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- setComp(g, 1);
" G( y( t, [) N - da(g);1 Q/ O+ r0 Z$ M% t. ~3 O' i
- let kk = smooth(1, k);//平滑切换透明度! |& A: s3 T5 g9 s
- setComp(g, kk);
. N0 e/ K( I0 p" q" a7 q2 y& ^+ F - db(g);
. @0 \% m% U ]8 B% N( c" I - t.upload();8 [# D) N" @: D3 ^8 `
- ctx.setDebugInfo("rt" ,Date.now() - ti);" `. Q8 s+ b6 e. ]# x
- ctx.setDebugInfo("k", k);' x8 T9 E: G+ q
- ctx.setDebugInfo("sm", kk);' H+ D3 R! f4 N7 o# F' \' W
- rt = Date.now() - ti;
. Y+ U; ?) G, C - Thread.sleep(ck(rt - 1000 / fps));; V+ _3 i; k+ C2 U: Q0 F
- ctx.setDebugInfo("error", 0)7 u* l+ Z4 Z* X. J- L1 x v3 i
- } catch (e) {
7 n' E3 I1 w: p! }2 \) {$ \, O- m - ctx.setDebugInfo("error", e);# h" r& r5 V' j$ J0 D# l; E
- }" [- l( b% a( d G% M* r( A
- }
c. t: w2 l' u; H - print("Thread end:" + id);
& _" f! R z; W' I0 `6 r2 O - }6 |6 w' v2 [' e5 \+ B% g1 S1 N- s
- let th = new Thread(run, "qiehuan");: c1 B% c0 W5 t& G9 }) K
- th.start();6 Y% u# @" e# s6 H
- }
. P$ D6 s) k" s7 V/ B - 9 u8 C2 u* x8 q+ ?/ ]1 g
- function render(ctx, state, entity) {- ?( p% p6 w* m" T. T6 B
- state.f.tick();" r) w# G, ^! p3 O( o& C
- }: y1 m3 } {1 U% T0 E Q) d% `$ @
. r- n+ J& f# S0 ~# m5 ^- function dispose(ctx, state, entity) {% T$ {5 `# u( G( R( Q+ Y- g1 O! g0 z
- print("Dispose");& d) ~, _, S+ f6 y8 S2 i' q+ J
- state.running = false;
0 s5 C6 h# f/ U; T# }$ C - state.f.close();$ W* U& h$ K) L6 U9 I' E
- }
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: U2 k; D/ Z9 a% ?- j- function setComp(g, value) {
( K4 _- a2 z% D# W - g.setComposite(AlphaComposite.SrcOver.derive(value));
3 N* E' }7 {: I- F7 b9 i8 d$ o - }
复制代码 # H r5 A3 p2 F- m. g4 f
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。
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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)9 r" G* g+ n5 T$ T6 k; t& {
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