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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。9 A7 C! H$ K q3 M @
- importPackage (java.lang);
^ A, [) ~/ I - importPackage (java.awt);+ m4 A( P4 U ~' y' F
- . H! O) E4 Q* z6 p
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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3 l# F6 Z. F& O- y6 W- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 }, G. [) ?/ a3 B$ M3 ~
- 1 t/ Q% J" H1 Z9 }# U# W; d! l
- function getW(str, font) {. a( S: t9 F1 N+ r) u
- let frc = Resources.getFontRenderContext();2 [; k' e4 Z5 q) d: a) o. Q* X
- bounds = font.getStringBounds(str, frc);6 l: `4 C$ t/ W6 d7 G6 k
- return Math.ceil(bounds.getWidth());
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- # i1 U, _1 q7 {" b+ l' R
- da = (g) => {//底图绘制
4 C5 \" V& O. ?7 e% n - g.setColor(Color.BLACK);
# S9 b: R6 P3 g& q - g.fillRect(0, 0, 400, 400);
, A9 E" a; `4 r! E - }
- j1 q5 I3 S+ ^& w3 _ - : o4 f. Y7 n0 T9 x
- db = (g) => {//上层绘制
y: O/ @6 j5 M- c9 v/ i# A* S t- G - g.setColor(Color.WHITE);( D4 D, F$ k2 t- G, g& ~% F; @
- g.fillRect(0, 0, 400, 400);
6 q6 \% a" D7 M6 D" L4 | - g.setColor(Color.RED);+ e7 F7 g+ {1 N& m( V* l
- g.setFont(font0);
5 Q6 N* F8 M' ?7 _ - let str = "晴纱是男娘";# ~5 ?2 Y. I3 u6 r: o& l, S9 Z+ `
- let ww = 400;
( ~) H9 k% {0 A - let w = getW(str, font0);0 G P( [/ | {: [) u
- g.drawString(str, ww / 2 - w / 2, 200);: u( I* K; I. }3 N4 m3 e: @) f
- }1 b7 d0 m# j4 }0 D/ b
- 8 Q/ s7 F4 B9 ~9 Z* H6 p
- const mat = new Matrices();
" E; j! I+ N! n7 T, e - mat.translate(0, 0.5, 0);7 k+ {- Z2 [0 ^$ L/ A' M
- % T( U5 J4 e+ _" G' X9 K- a
- function create(ctx, state, entity) {% h. o6 l5 S7 f- P8 e; e
- let info = {/ p8 d0 {; w/ p, _
- ctx: ctx, i, v# p* U/ K D
- isTrain: false,: F" I* n2 y! V: z) C: W, y# q9 w
- matrices: [mat],/ h1 v3 T5 W2 \$ p
- texture: [400, 400],/ `% R! M: u& P- |
- model: {
+ q4 I% G' I2 L$ l - renderType: "light",
# M. a- @$ d5 S% | - size: [1, 1],0 X, D. s& B- D6 u& g( m" q, r* {
- uvSize: [1, 1]
m/ Y, B8 U& M( Z0 \; m! i - }
& I, }% n/ [* \' e4 G0 c* \0 S: q - }
( {/ ?8 a; h; s3 U - let f = new Face(info);
2 D- v6 Y# q- ?- t: i- a - state.f = f;
0 K# g# o* k8 o: O0 N" N
/ v& {/ E) b3 c" T6 {- let t = f.texture;
0 o5 I, m$ g9 G0 p - let g = t.graphics;
$ n, h0 j/ \9 _6 T9 G% z0 ^ - state.running = true;
+ O/ k0 ^+ p6 \! F - let fps = 24;
/ ~+ q3 m8 b/ K! ^, {( ] p - da(g);//绘制底图: n! r1 k/ L8 b
- t.upload();
7 n# m4 X( Q3 G- a% q7 @ - let k = 0;
1 C$ v+ ]+ p" M# c9 k$ D- g1 m - let ti = Date.now();$ ]( ?( a6 F/ U+ M7 ^! P
- let rt = 0;
- L8 Q6 J7 m: u! V$ O6 E3 E8 t0 b3 k - smooth = (k, v) => {// 平滑变化
& a( U. A& l* A6 z/ } - if (v > k) return k;
c8 I7 q( B5 C1 l" I - if (k < 0) return 0;5 w$ q8 c- t6 o! `
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) a5 F) r8 W' c Z# o
- }
6 `7 ^8 v9 t( B6 p8 f - run = () => {// 新线程
K/ Z9 w6 c6 v7 N) L0 t - let id = Thread.currentThread().getId();: K3 J* f, Y8 R5 ~+ o [% P$ C8 v
- print("Thread start:" + id);8 M' k* b' F- @
- while (state.running) {! p! |* F0 `( L9 z
- try {, k$ f* u+ S1 H2 f
- k += (Date.now() - ti) / 1000 * 0.2;
7 ?, i4 q; J b; Q8 d1 V - ti = Date.now();
% ]; i5 V J7 n# ^ - if (k > 1.5) {
4 h, V+ a' P4 x4 F- d# g - k = 0;
6 J/ L1 Z/ g/ \ - }7 |) ^, A; h* f$ G: {+ s2 ? ^
- setComp(g, 1);
' B5 l0 T6 K( K$ f1 k2 X8 X" m' S - da(g);
3 l5 o( W- [1 I, J. }6 k ]5 O4 T" f - let kk = smooth(1, k);//平滑切换透明度8 [9 s6 B. W) C2 U% G5 p3 e
- setComp(g, kk);5 S2 h) W. v- y7 M( ~: l3 X2 O3 o
- db(g);
. ~3 u# n/ h& D& A/ _ - t.upload();' V( h9 K6 W. V$ Q: p- A# F+ Z
- ctx.setDebugInfo("rt" ,Date.now() - ti);0 B7 Z/ U: B. p* w+ b' e/ Q
- ctx.setDebugInfo("k", k);
5 a2 R6 A0 q* c9 A - ctx.setDebugInfo("sm", kk);
1 B, X7 s1 } G: n - rt = Date.now() - ti;
' U" J1 M5 _) q$ k" \/ B - Thread.sleep(ck(rt - 1000 / fps));
7 m. @0 q5 n8 ]+ V9 F2 g - ctx.setDebugInfo("error", 0)- ?' Q- m' r, w/ U: P( y0 v/ W
- } catch (e) {! h* q+ ]% p8 _: R; P# k: {
- ctx.setDebugInfo("error", e);( W; t8 Y& ?1 z& m' I
- }$ y( X# s! x m, {0 J
- }
7 ]4 g* j5 Y: m - print("Thread end:" + id);# m! E, j% _; N! ~$ W6 c$ W6 m
- }
5 g- } @4 ?. f% C- U4 P - let th = new Thread(run, "qiehuan");
8 w% r% k6 O6 n7 Z - th.start();( J7 w7 Z1 e- d4 E' ]7 w
- }; ?: r: }- ~/ v. \/ N8 x
; Z, U" Z% r1 c4 r3 C4 |% e- function render(ctx, state, entity) {8 V% ]' z) {% z: P( ]+ T5 ^! F
- state.f.tick();9 S( @ ?; h- |
- }- F+ ?% Z/ F* A& @
( J2 j3 F+ v: s( ~- function dispose(ctx, state, entity) {
5 }" V. p! S2 ] - print("Dispose");5 T* B6 M% j6 g% y3 w
- state.running = false;
4 j* G# K* o1 o) i- S6 p. M) U - state.f.close();
* ^4 [) p6 m/ D - }
$ F( z4 G) ]) {8 {( [- u: Y
$ T/ R; [ F9 M/ S+ v: M1 R3 t* M" z- function setComp(g, value) {
0 c4 V; Q y4 a; X3 Z& N - g.setComposite(AlphaComposite.SrcOver.derive(value));
5 P+ s" @7 s1 H - }
复制代码
2 @; q$ M0 X9 M: F O! }" 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。
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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)6 P) m- ~; ?5 T5 Q
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