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1 f1 p- d& T: B1 S. E! A# y7 T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。% E+ W1 ?( z" i1 t
- importPackage (java.lang);
. E3 J$ m) s& a5 U9 B/ S5 o4 D' N - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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2 _8 g' x4 R3 r. \- function getW(str, font) {$ U& c# ^, q* D8 [
- let frc = Resources.getFontRenderContext();/ O w# s, `% V) d f; G
- bounds = font.getStringBounds(str, frc);
. p( Q# j3 s5 I! l/ i - return Math.ceil(bounds.getWidth());$ \8 B7 P; W+ e7 O& S6 x, g+ p( W+ L' T
- }
; n0 ^) I9 m; s2 x+ n9 m - # C) S. T; @+ j( L! w/ A
- da = (g) => {//底图绘制
5 v: @" G/ Z$ Y8 `7 E4 W7 d: A - g.setColor(Color.BLACK);* }' K+ y8 F) v* o" t
- g.fillRect(0, 0, 400, 400);- D/ K. Y: B& ~ T
- }0 m8 A \" e/ R& j) N: [1 o
- + A8 q7 b( M1 t6 @; }! g$ C, \
- db = (g) => {//上层绘制
! e/ ~( G p/ e0 k+ ?3 m - g.setColor(Color.WHITE);- _- Q1 x* n7 ]4 P6 V1 y. m
- g.fillRect(0, 0, 400, 400);. X' d5 t! r8 {7 C+ x/ d
- g.setColor(Color.RED);
& T; a' j c* Y0 E - g.setFont(font0);6 `9 e$ x! ]% B* ?3 G* {3 v# J
- let str = "晴纱是男娘";
, P9 C6 |! N) y; ~ - let ww = 400;
1 n# J; | u" G - let w = getW(str, font0);* {! Q/ x1 ]+ }( e7 k# W
- g.drawString(str, ww / 2 - w / 2, 200);9 I/ T6 T# N Z' x+ n0 F9 }
- }( v# {/ K0 h3 W5 V9 F. U
- 0 E) h7 U K1 c, e: o, W
- const mat = new Matrices();
% S l9 q q% W4 y8 m! w9 C - mat.translate(0, 0.5, 0);7 s/ p/ h1 a0 F' J: a. \4 j+ h
- % M9 @5 H/ I* x- W, I
- function create(ctx, state, entity) {; Y8 n7 ~$ v* B. [0 T) { a. S
- let info = {
8 N/ n9 ~- \( Y5 U+ \ - ctx: ctx,4 @2 K; j2 O/ o+ ]; M$ V: k' m
- isTrain: false,5 |8 u6 V8 K- X# S1 o# u! L
- matrices: [mat],; l/ g& W5 C. {5 H/ h
- texture: [400, 400],7 r [, y& W- x$ q$ O9 g& {- P
- model: {: c% x# g2 b6 ?. U
- renderType: "light",
% g. `9 e6 V, K& l) ^1 M - size: [1, 1],
! [4 L. ?5 t1 X5 [ { - uvSize: [1, 1], a- w6 I# j9 x7 n3 H8 ^* o
- }
# O0 P) a! N' ~ - }
) U! n1 @% G* H, a; |# J9 n - let f = new Face(info); _0 u7 n' _6 O0 m
- state.f = f;
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- let t = f.texture;3 k; E2 ?( _! G
- let g = t.graphics;
, {3 R/ e6 y9 {* U8 w2 l - state.running = true;; L0 o. R* A" I" ~1 u0 n
- let fps = 24;% U* t2 n/ [& p2 b# q
- da(g);//绘制底图
, O6 I. |& `: q/ z8 q4 u - t.upload();# e0 C% a, C# U/ e
- let k = 0;2 h0 u+ G5 r! [5 c0 A. V
- let ti = Date.now();# f9 G7 v4 O% q* l& d
- let rt = 0;
/ p' z1 E) W4 [: p |8 F - smooth = (k, v) => {// 平滑变化
: t! ~0 G" _( d7 q# e - if (v > k) return k;# y; `5 B6 c3 Q9 s& s, _
- if (k < 0) return 0;
6 t1 \& \" s( q# k) G; l - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;8 H. o) H+ T% ^% H0 R% [) L
- }
, V; _6 J. n3 K- g6 t - run = () => {// 新线程! ]0 P- Y/ Q- w c9 w% y$ `
- let id = Thread.currentThread().getId();/ i* s; k& L6 X& n2 W: Q7 @
- print("Thread start:" + id);
4 V* u6 x! [; q& M2 u - while (state.running) {
, p$ o' |9 D0 B* F" v - try {
6 T& Q3 \- k5 e5 n7 j! z. N& c - k += (Date.now() - ti) / 1000 * 0.2;
3 V% J' l5 W! [9 b - ti = Date.now();
; K: T3 w/ ^0 l' l" j- T% ? - if (k > 1.5) {7 n* c& U: c$ ]5 K) z% V
- k = 0;! b* V) Z/ x4 C; g9 w' U' W
- }2 p$ C9 {& R w) ^( s
- setComp(g, 1);& R7 ?, h! ]/ F( E
- da(g);
: V A, S' n6 J3 {) u' o - let kk = smooth(1, k);//平滑切换透明度: A8 \; G7 X. ]5 ^' Q
- setComp(g, kk);
0 f4 L* d9 Q! V - db(g);
# D$ u B9 c6 [; L! a - t.upload();
' A J# h! x& c) O/ ~5 G% H5 H - ctx.setDebugInfo("rt" ,Date.now() - ti);6 T+ t+ f( m9 l
- ctx.setDebugInfo("k", k);7 g; t6 M& E5 W% @6 O& ]
- ctx.setDebugInfo("sm", kk);
6 e' h0 Z8 h' l - rt = Date.now() - ti;. t7 ^# P% m: Q$ O" l4 c/ U6 t
- Thread.sleep(ck(rt - 1000 / fps));
# o: D% _; ?7 g- n - ctx.setDebugInfo("error", 0); f% g* h' H z) }7 [
- } catch (e) {
6 |0 S4 V7 H+ n! e9 J - ctx.setDebugInfo("error", e);
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- }
- b0 [: \7 @1 W' g - print("Thread end:" + id);! k) c: \% o* r
- }
: \7 ?7 K% j* u/ ~# `0 E$ v* ^ - let th = new Thread(run, "qiehuan");
+ O2 E+ n% q3 a* e' k1 n - th.start();
) Z1 K' E# m+ y - }
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- function render(ctx, state, entity) {9 z& \2 H3 f/ `/ h
- state.f.tick();
- Y/ O9 a+ E1 v) J9 ^% b - }# Q3 C) S! l n' S
- 1 q5 e/ @# o% h
- function dispose(ctx, state, entity) {
2 y: N- |( t! W }, ^- N- F( ~ - print("Dispose");! ?' l& a6 y9 ]' P: R
- state.running = false;2 s* D# }" z+ B
- state.f.close(); E2 a/ E* I7 g u+ k7 B/ E* t
- }
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1 z5 L9 O+ P* `- function setComp(g, value) {
$ k7 Y6 }( {& ^. M/ Q, M5 D9 r - g.setComposite(AlphaComposite.SrcOver.derive(value));
1 r% q) U' A8 P1 t3 F2 ^3 L- ~ - }
复制代码
2 k; L, D5 u4 J4 C* {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); n5 H/ h! l0 x
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