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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。
) l0 u2 P# p' P* N- G, q6 ]0 ^- importPackage (java.lang);1 e) X, N: x/ K8 |4 D$ \/ G7 B
- importPackage (java.awt);
& x5 i8 z( l6 y- X! K( V3 ~) T% r. p - 1 m* p8 Y4 h/ l* Q/ G+ F
- include(Resources.id("mtrsteamloco:library/code/face.js"));; b, L3 c' |/ S5 V
& m6 @. n. y/ l% K7 b- v7 M- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);- a0 W! A+ q4 ~4 V! a7 w
- ) F! i$ [ w+ l
- function getW(str, font) {6 r- B+ j Y* `; n4 T
- let frc = Resources.getFontRenderContext();
# `# {7 N$ g, v& h# H( ~7 k" ] - bounds = font.getStringBounds(str, frc);
$ I6 V/ {$ g! T9 S/ Z/ w - return Math.ceil(bounds.getWidth());
& E( R' \0 p" F# @1 O/ m e - }+ s' C0 d9 A( w4 b: z1 h1 d1 ?* P# W4 T
- . y4 p' Q9 x6 I% d! N: L$ m) C
- da = (g) => {//底图绘制- t4 O& _# e0 A$ H$ F. H
- g.setColor(Color.BLACK);
' @* Y5 ]- o) ^; V, f - g.fillRect(0, 0, 400, 400);# B8 b% o( P9 b
- }
. E! A B j5 u$ ~2 I* H4 G$ G
4 e1 X$ X5 N% O8 k3 C# P. r5 `) U- db = (g) => {//上层绘制" ], [7 O& X! ? S) ]
- g.setColor(Color.WHITE);
7 [* h+ Q3 l1 @, i0 B3 e - g.fillRect(0, 0, 400, 400);
U' j9 p1 \7 [3 Q/ @ - g.setColor(Color.RED); {/ ]5 ?0 z! a+ k
- g.setFont(font0);
/ e: X0 N+ e5 W$ n; D: _8 Y - let str = "晴纱是男娘";
9 A# l! L7 p8 V1 J0 i0 u. J - let ww = 400;
: q6 f. _' _& x7 m - let w = getW(str, font0);+ \ u( y# x4 f; M- ^1 N% q6 H3 G
- g.drawString(str, ww / 2 - w / 2, 200);
; I* R: B5 v+ s, w+ c8 F- ^ - }
- A" A$ k. c2 i+ L. s
, ]& L& ~- |3 P" E1 K/ q' d$ e- const mat = new Matrices();
. o: P0 V1 A8 ] - mat.translate(0, 0.5, 0);! j1 z, B( c* `: |, {( B
- . Y; K# d; k; U4 F8 e. v' X5 ?
- function create(ctx, state, entity) {& N* {! G) Z2 S. s
- let info = {5 D( d5 K( b) U3 i9 W+ }" I
- ctx: ctx, F7 F! Y, [* g
- isTrain: false,8 n' w3 I+ ]( ?: Y+ G- u
- matrices: [mat],! s* R& R' `# g- E
- texture: [400, 400],0 ]3 m* X& j% c w s/ H; z
- model: {
( S9 Z4 B3 E( z, T% }9 f - renderType: "light",
) L1 p9 \- f# z. i; t. L& G - size: [1, 1],2 D$ a5 G6 A" _
- uvSize: [1, 1]; n& p' x) N. r/ X& @7 }
- }2 [. I" A, U2 R. H
- }0 g, `# p( m, p$ i3 `2 S9 s* p6 c- ^
- let f = new Face(info);
' d. k* } M9 a) `- ~% o - state.f = f;2 l ]% |+ }2 Y4 R' B& k
- & k: U& u. p7 G8 \2 A p- B) ]. n
- let t = f.texture;+ N; Y# q/ O; i$ j+ `3 t; G! R$ |; h
- let g = t.graphics;
& o# Q1 H- v+ `# s& _9 T8 h - state.running = true;5 d6 \0 U; X. z6 Z* |
- let fps = 24;+ r8 L* z- l- h- {
- da(g);//绘制底图, j; |) M6 }2 q. k& s% B3 P
- t.upload();
* {7 B$ ~- m, l! _$ l4 F8 G - let k = 0; S4 p/ d' |' t. g$ h5 u' I; o
- let ti = Date.now();
. H- S# t2 v! k5 H& @( v1 A - let rt = 0;& P0 X3 M0 z6 N( c; S
- smooth = (k, v) => {// 平滑变化
. S; Y( h& V& U5 _ - if (v > k) return k;8 @, L. T4 {' v! D
- if (k < 0) return 0;" G5 W8 {8 L: ]1 z
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;# o; m+ m3 z; Y( F: f o" q' P
- }
1 X& U8 H6 g1 G1 {$ R0 E, w6 u - run = () => {// 新线程
( u) J: a; t5 [ - let id = Thread.currentThread().getId();
( o+ Y8 n4 ~* B3 o+ U - print("Thread start:" + id);
5 R- v0 |/ X3 R9 S0 @0 W9 H r* E6 S - while (state.running) {
9 O% i: _% ~( A2 F9 R) \/ A; @ - try {/ {3 m* u, M- a3 ^! U R9 v+ ^/ w
- k += (Date.now() - ti) / 1000 * 0.2;+ S9 l0 P' L" A/ L- W7 c
- ti = Date.now();1 _ r7 f+ B1 e+ X
- if (k > 1.5) {
- N; m6 S1 }1 H" [6 \ - k = 0;
: ^" e, k% e+ P4 `! t* z; u- | - }* ` |/ G9 {/ G% X# A7 {. J. s
- setComp(g, 1);
0 f1 B- n+ T; L! \6 Y - da(g);7 I( q- E( \+ q( ~
- let kk = smooth(1, k);//平滑切换透明度
- d- a! G# }6 [ - setComp(g, kk);
: E0 A% P+ J$ V- k - db(g);
, N9 ]& B0 g9 h3 s- p - t.upload();; ]% u/ ~; ?+ ?) D# j' o
- ctx.setDebugInfo("rt" ,Date.now() - ti);
7 ?+ N2 M: f+ k7 m - ctx.setDebugInfo("k", k);
% {' _- J- c6 Y( v+ p, o - ctx.setDebugInfo("sm", kk);
2 X3 l( i1 U( U9 G$ @ - rt = Date.now() - ti;3 o% `2 n# r B3 ^- k$ Y( h2 D
- Thread.sleep(ck(rt - 1000 / fps));
! A7 W: V2 g9 Y/ B6 [9 g. s - ctx.setDebugInfo("error", 0)/ G5 I+ O. ~/ k% i
- } catch (e) {
3 O; Z8 W' j6 Q - ctx.setDebugInfo("error", e);2 M; Y" m. x1 b* C# E$ e8 g) o
- }+ t2 s4 F5 \) V j
- }! G9 p( Q1 M3 C3 T% R
- print("Thread end:" + id);, K$ j; s$ D. ^$ l8 t" N. ] c
- }( ~# }* {; u4 Y! ]7 X% S; K
- let th = new Thread(run, "qiehuan");
1 u1 ~& X* q( S6 k7 v* j5 Z8 @; m - th.start();9 s0 Y% W) ?) h, t) _3 @
- }- p( Y7 o7 T; |0 g
- 8 U) t7 G; ~ M9 J! ]) B. C Y
- function render(ctx, state, entity) {. S. B0 P& o2 q" K
- state.f.tick();
% g; @* T2 {, X2 k - } O) q8 l, ~/ T2 ~ w. w& L
% C; w, h$ W$ N0 {6 v- function dispose(ctx, state, entity) {" z2 m5 v; B( \( _; {# Y1 P
- print("Dispose");& I7 C. j/ W5 J3 S2 i
- state.running = false;* o7 ]% o' b5 K' d8 ^1 W
- state.f.close();
) V& ]" f/ g9 {1 M; K+ Z - }
" ~$ L5 F' v6 B4 s) j8 |, Q - . Y5 e+ D, w% [% Q- X. E
- function setComp(g, value) {
$ \" J/ J5 W! c) X - g.setComposite(AlphaComposite.SrcOver.derive(value));
' \8 o+ [. R' h. G+ |% S - }
复制代码 5 H# _5 ~, w8 W( m1 @% M8 D
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。& M+ N/ ? z0 v3 R
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+ i/ w! ^6 V+ e+ g+ \! f' y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 C9 A# d2 c" |
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