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: n- [2 q: G/ M7 i4 F8 } s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。; Y% Y$ G+ \) b S. Y
- importPackage (java.lang);
/ H3 p3 c. N9 Q1 [% |% o - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));! r) Y# L( ^4 `" W& d# B
- ( d, C3 L! [$ g" Q
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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; G* O N7 k: `) W* l7 P# p r! X- function getW(str, font) {, l: m; W% ?3 B7 _% ]
- let frc = Resources.getFontRenderContext();$ e* v0 f! t% {0 D- m5 j* I
- bounds = font.getStringBounds(str, frc);% W5 a) a1 [! j+ d4 R
- return Math.ceil(bounds.getWidth());
8 ]% i t; L& s4 A( V - }
- ^/ _8 `6 Q2 M: s9 D! K" X; y - & e1 O, j& W o
- da = (g) => {//底图绘制- L7 ~& I- v5 N/ ~- ?! y2 X( r
- g.setColor(Color.BLACK);4 ^% f c1 N4 X# s( S5 \
- g.fillRect(0, 0, 400, 400);
% T+ T: C* O" p$ c& k I7 E - }
' R9 a+ f5 v! F* S/ u - - w. g# U0 Y4 V
- db = (g) => {//上层绘制
# g b& _7 ^+ N" }/ s* p) o - g.setColor(Color.WHITE);
) _2 s6 }9 H) f ~, O - g.fillRect(0, 0, 400, 400);' c: l" W0 O. b6 A5 t% y
- g.setColor(Color.RED);
& Z- v) s, [( } - g.setFont(font0);
3 }( w- T4 h" ^ - let str = "晴纱是男娘";
8 p4 H. |$ I; ?+ T* T( R# I - let ww = 400;
6 h$ [+ n [6 U% ^( v - let w = getW(str, font0);
$ a# i- s" Y/ O% h7 b - g.drawString(str, ww / 2 - w / 2, 200);5 C5 r- `* k) u) c
- }2 ~4 ^1 F) W. G4 J! R9 D# T
5 @/ p+ ^" r: A7 o- const mat = new Matrices(); e h9 ?, o/ S
- mat.translate(0, 0.5, 0);9 X" e$ y5 z* {( @
2 I, M7 t6 ?; L9 x- v: \4 i" I- function create(ctx, state, entity) {% Y& O; ?7 c5 u1 g
- let info = {
* y+ x) n7 U+ { Z/ y2 b) V' J. ~ - ctx: ctx,% O( k2 f" _8 ^: E; ?
- isTrain: false,; g! Q0 X9 P+ E# F4 V9 B+ p
- matrices: [mat],( Y& k" F( W- n- J: K5 D
- texture: [400, 400],
4 I7 D. @; n4 `+ D* ~ - model: {
$ K% |8 \9 q. S+ r" s - renderType: "light",
6 Y4 @. K' m/ z, ~ - size: [1, 1],- ~& Y5 z m3 p/ k) W
- uvSize: [1, 1]+ [% Z: M$ X7 F$ q
- }0 Q" h% T& ~- A" G# m
- }! `% v6 U4 h s, G) X( V
- let f = new Face(info);4 D+ `7 j1 p6 S; U$ r1 C
- state.f = f;5 h7 g$ k- W$ m3 e5 d# T' R0 b
$ W7 E$ D! S$ m: J- let t = f.texture;; j7 o9 x. W: q3 N2 U9 }+ b$ a6 _
- let g = t.graphics;
! |: q0 t" y7 b2 i; Q - state.running = true;. d; I! u+ T' c% [* {" ]8 y
- let fps = 24;3 j3 l# G/ K4 {1 _2 |# J8 q
- da(g);//绘制底图
% Q- A+ b2 D5 L# s* v6 U. R5 r - t.upload();
9 z; Q- G# W$ u& P: W - let k = 0;
/ h |/ J& h" Z) `7 u9 K - let ti = Date.now();
7 K2 z. B% p& m6 L+ `/ Z; z - let rt = 0;) a. L+ |" k' u- z
- smooth = (k, v) => {// 平滑变化. d2 u# P* F& S3 O: `2 B2 q9 F8 S
- if (v > k) return k;( s1 V0 Y, {, A$ L3 u
- if (k < 0) return 0;7 W% D f: h5 X# O" d U
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
" F$ k7 q, U+ ?# g# c1 P1 T - }
) b9 J8 C, t' ] - run = () => {// 新线程( ^( ^( f, ^1 ^5 i2 j. r
- let id = Thread.currentThread().getId();/ ?4 S% ]0 W* L) [2 _4 D; b
- print("Thread start:" + id);2 {0 i) {, R \. K. ]
- while (state.running) {
9 I! L& f2 z0 Q! C - try {. `5 T. r: e" c( ]
- k += (Date.now() - ti) / 1000 * 0.2;
. i7 W* x6 h5 q( B, X+ Z - ti = Date.now();- f T2 \; F! j7 O( `6 J
- if (k > 1.5) {
4 x6 P: M$ N( a9 N- C' T' w1 f - k = 0;
' G+ F+ g( s4 f# A# N3 m - }
+ _3 y, N# P: r2 A% u% e7 M - setComp(g, 1);1 {1 {9 W9 Q. D9 y u
- da(g);% ]/ T" Q m# ~) F
- let kk = smooth(1, k);//平滑切换透明度9 I) c3 m! x m$ M3 I! v
- setComp(g, kk);
0 L0 ^" ]! [6 m2 M K3 ] - db(g);- e6 Z0 ]* V' `3 N$ ]2 i
- t.upload();, t6 W1 f4 }, j8 O3 a/ o
- ctx.setDebugInfo("rt" ,Date.now() - ti);
" E2 Q; P" c: f1 t' D( e - ctx.setDebugInfo("k", k);
. w" S3 f$ v* `* X: ?* Q - ctx.setDebugInfo("sm", kk);
L# T {2 ~( L# G# _6 R - rt = Date.now() - ti;, D" j% ]0 t8 T
- Thread.sleep(ck(rt - 1000 / fps));: {; x: u# s4 H8 H0 t! l2 I% b
- ctx.setDebugInfo("error", 0)/ j( @: P. j+ V* r& R
- } catch (e) {
: i' d' r% F$ F# T+ D6 S- Q - ctx.setDebugInfo("error", e);
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- }$ y3 {" L% n! g) S
- print("Thread end:" + id);1 c3 C. z) E) v9 l
- }5 n7 O2 `" {, T, Y9 j* W
- let th = new Thread(run, "qiehuan");. g! B# ^8 |. i# f7 C! A
- th.start();. P) A8 {$ S, w% K" W+ N* B
- }
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- function render(ctx, state, entity) {: R* {; i' y/ h; Z% L) M1 l
- state.f.tick();! s9 l6 b5 V( w4 u( G
- }- V5 M. l) Q4 [% O, O2 k; Q0 V
7 t9 h' I$ _0 ^+ e5 F- function dispose(ctx, state, entity) {
% H w/ [( s" ]/ f. J4 ] - print("Dispose");
9 P8 X7 L: l/ T2 a - state.running = false;
9 f2 w8 D- b0 V# N - state.f.close();1 f+ a3 a+ ?( o3 D! v' i: u
- }
& V8 f7 T% C$ E$ _
& Z( z. Z9 `# u W" a3 Z- a, }- function setComp(g, value) {! _7 B& c8 r: Q0 ?5 S! {1 v
- g.setComposite(AlphaComposite.SrcOver.derive(value));& s/ o9 [# `8 D! Q. J' h
- }
复制代码 6 _, J9 r7 R. d/ d; z7 ]
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)
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