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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。3 o& e p7 f2 T
- importPackage (java.lang);
3 T/ ] o: w* f" m3 g, O& N, P - importPackage (java.awt);
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* V7 ^& l" M9 O& j. D) q- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80); I% y4 j+ V/ F
- ( E2 E" ~' Z; c6 A9 f; S1 ]6 S
- function getW(str, font) {8 E" j8 J# c6 {- K
- let frc = Resources.getFontRenderContext();
( s, e p, r) W& H! `1 M" H& M i0 H - bounds = font.getStringBounds(str, frc);
- N* ^6 ~/ G& P - return Math.ceil(bounds.getWidth());
" F5 f5 v' F/ \& A5 j2 y* ^ - }% {) `7 G; U N) F c) \
/ o/ j2 a k' Z H5 X- da = (g) => {//底图绘制
* n1 P9 m: B3 y; y! v4 I- p; M - g.setColor(Color.BLACK);
( s: N0 H& Z, m% |0 A- x - g.fillRect(0, 0, 400, 400);
" e }) [8 f# X' L - }
+ Z1 {8 p) ^6 L% ~/ {0 i - % a) T% I3 c- H7 L( @
- db = (g) => {//上层绘制! i7 k) D% G- V2 N, h
- g.setColor(Color.WHITE);$ L! G$ o. l/ Y$ h+ g
- g.fillRect(0, 0, 400, 400);
2 [$ g P% |5 s1 T. T0 C5 z - g.setColor(Color.RED);
G/ ^8 {. F6 S+ U3 r3 W' z7 ^6 U& @ - g.setFont(font0);
, e0 b3 U }, t& A5 ^) U - let str = "晴纱是男娘";
7 L/ c9 Q |; w* Z& T - let ww = 400;5 z! m3 d) u; j
- let w = getW(str, font0);5 \2 [) H$ j% A, B* P6 W( b
- g.drawString(str, ww / 2 - w / 2, 200);
4 H: w# Z9 H/ P- u/ |' x. t - }
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- const mat = new Matrices();& [5 Q: |: U; ^+ F' q' b' x" |
- mat.translate(0, 0.5, 0);
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" u. M8 `. w: E, P$ O/ M+ }- function create(ctx, state, entity) {
) H8 f7 p0 E( x5 W) d" h+ d - let info = {4 P: x; O; Y Q; ?6 g/ l7 U' ?
- ctx: ctx,
! l v) F" @# D1 }% ^1 h/ i - isTrain: false,
& d4 C7 n8 g: U6 j2 ? - matrices: [mat],% x& D: l$ J+ J8 h+ e& Y! h
- texture: [400, 400],
$ J& O' @. E0 G. p3 |; S% V6 }. c) ? - model: {
1 G4 Z: C! p( F& \; c - renderType: "light",3 M( |# t" I: z
- size: [1, 1],% K2 Z9 }& H+ m. \
- uvSize: [1, 1]
2 ]2 w d; A# d' b1 t, e* h - }
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- let f = new Face(info);' k+ k% u! M; Q7 A* L1 ?4 W
- state.f = f;$ u4 Q" H8 T+ E9 F3 {* l u" i
- - l) a( h1 p4 b1 \- a
- let t = f.texture;
+ n0 n" b9 w- p" t" _ - let g = t.graphics;
) C0 Q5 V( F9 e! X; X6 P/ k - state.running = true;
" i9 L1 l+ k5 } - let fps = 24;
6 }6 E8 z# B# {- v; F - da(g);//绘制底图
/ V7 B/ R- `6 t+ ^ - t.upload();. Q' I: Q# U! l2 d" v
- let k = 0;8 n" u6 ~3 L5 y0 B
- let ti = Date.now();
0 F" |; N; Y5 W( c6 N# y - let rt = 0;0 ?" S% t& i5 S
- smooth = (k, v) => {// 平滑变化4 r t! R1 K( ?# Q7 }
- if (v > k) return k;
5 X9 {6 E' [) i! C, y - if (k < 0) return 0;, S$ ]3 A. G, z
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; r0 `* z! K Z! x
- }
; @& ]- R% g7 C* J+ l - run = () => {// 新线程0 C% s/ o3 Y$ e0 I1 T% J& I% y# J
- let id = Thread.currentThread().getId();% \' \: B5 }( q
- print("Thread start:" + id);
. g% _3 C& q4 W: K* i - while (state.running) {- `' V8 e) c# f9 c. z
- try {7 B5 g+ y$ u) _* Y
- k += (Date.now() - ti) / 1000 * 0.2;
J- P. p( T! Z3 ?$ L - ti = Date.now();3 Y/ W0 ?; Y& M4 i; d8 r
- if (k > 1.5) {# }! }. K- H" H6 x
- k = 0;* e9 s: E8 A$ l
- }+ B& j& U4 R# B" c3 ^
- setComp(g, 1);( E4 g; C' M8 C9 T/ Y7 ^# M
- da(g);
0 w' d- s3 S4 O W - let kk = smooth(1, k);//平滑切换透明度! N' ^8 @/ Y u# A$ V+ d0 B& I
- setComp(g, kk);- H( Y) l9 ~& u L' T
- db(g);
, g, C G! ]. ` - t.upload(); V4 j" n9 \! K! j' S% a; X5 z
- ctx.setDebugInfo("rt" ,Date.now() - ti);! q: d m, l0 u" M+ u- T" l
- ctx.setDebugInfo("k", k);* f. c# D; y b M
- ctx.setDebugInfo("sm", kk);6 ?+ s4 y x) Q/ ^
- rt = Date.now() - ti;
3 n: e7 P3 P" @" \- n - Thread.sleep(ck(rt - 1000 / fps));. t; {" y! Q, }( f1 h+ G5 B
- ctx.setDebugInfo("error", 0)
, l; [2 o% B4 \- } - } catch (e) {
# `- k0 D5 i9 ` [ - ctx.setDebugInfo("error", e);
+ H, B: [5 z% J4 E3 N- Z' s - }
1 V3 g1 n; Y1 }4 F" D4 p: q - }
1 @% l6 x6 m- x8 X - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
4 C1 _5 l/ ?, _ - th.start();; V3 d' ~2 [9 f* o
- }
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( f9 M! X7 @% r/ Q4 E- ]- function render(ctx, state, entity) {
+ o( K2 G3 t4 c9 b* e5 T2 t - state.f.tick();
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: l9 ^3 j& Z$ t1 B* a- i- function dispose(ctx, state, entity) {4 n! }# t" t8 G! `; \
- print("Dispose");. W7 t8 {& w" L
- state.running = false;1 ], b/ T' J+ [, @' l5 C. V
- state.f.close();
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# h) R- j+ _) x$ i- function setComp(g, value) {& V" ~$ T# t9 u
- g.setComposite(AlphaComposite.SrcOver.derive(value));0 B- q' q& Z+ a3 V
- }
复制代码 7 ~/ l' D) j/ e: g: N1 A* D4 x1 s
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。0 x* Q2 u3 S x5 ?. g2 r3 ~, _
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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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