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. f3 G2 u6 R- D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。. N1 ] F* M1 A+ B- Q, U# Y
- importPackage (java.lang);- l7 o0 Q# a/ h, y' A0 t
- 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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, T- q+ x2 Q, p2 @, ?: U6 E- function getW(str, font) {8 d* M8 _) a0 |7 o6 L7 A$ W
- let frc = Resources.getFontRenderContext();2 n" G+ K7 s( B4 H- g
- bounds = font.getStringBounds(str, frc);) I) G7 ?8 c( e. P: I2 S- a
- return Math.ceil(bounds.getWidth());
/ A9 `: o0 R" O- O1 Y+ }- \ - }
1 C. ]! @/ x. F6 L
5 B* Z8 @/ S0 W3 ~- da = (g) => {//底图绘制
5 c) ?' I1 T0 v, ? - g.setColor(Color.BLACK);
h& j P' R; ^% Z" B* p - g.fillRect(0, 0, 400, 400);
. d3 F0 W- k9 Y. l - }# A2 z D- h# i1 t
- . k# l3 _. ^! C1 }# l
- db = (g) => {//上层绘制4 T$ b& k. v3 S, \9 P5 D0 w" c
- g.setColor(Color.WHITE);
0 A# r( B: c1 | - g.fillRect(0, 0, 400, 400);
. S! K+ }9 i4 W7 s! U" B - g.setColor(Color.RED);
6 m: R9 M B6 _ ]4 y - g.setFont(font0);* Y) O# K/ T: X3 O- r& w) q
- let str = "晴纱是男娘";9 J) |1 Q) u, l" T0 |/ G+ D5 V p
- let ww = 400;
" _9 d2 s3 O( N2 [% [# h - let w = getW(str, font0);/ o8 b9 S. I6 E7 B! u- f B4 |
- g.drawString(str, ww / 2 - w / 2, 200);- @5 t# S( e7 } a$ `8 B Y2 K- U
- }; \8 y* O. o6 J9 q" h
0 Z! P3 j; s& O7 I* ]* f1 W- const mat = new Matrices();
. h8 X1 c1 i) d9 P; ^ - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
& v* q& L+ {( t+ b4 p4 b; Z: ?% y - let info = {
2 X( C/ _# b' h: G$ T: K! h - ctx: ctx, W* F* m) [$ O, A+ @
- isTrain: false,
5 }/ C# Y" k$ Y. i# T- r - matrices: [mat],1 d* M) V+ H4 R! ?
- texture: [400, 400],
6 O w# f6 E M0 N" c - model: {3 F5 y/ q: J3 {% ^4 A
- renderType: "light",
+ w7 o" y/ B) b; }" n - size: [1, 1],0 ]3 G- x: E* @" t3 n S" c% }8 b
- uvSize: [1, 1]8 z* m8 `: u9 W
- }! |" Z: G6 Z. |2 H+ {
- }6 u$ I8 ^! S/ p% ]6 S
- let f = new Face(info);
, v9 {5 [9 s6 S; f' h" u& ? - state.f = f;- ~( u: S$ `6 F" X8 J; V% ?
- # U: B' `. ^" a7 W& A
- let t = f.texture;
0 C8 [4 ?. S7 S7 t8 Y, I9 E& J/ e - let g = t.graphics;
, P- P) a# Y& n0 P% f - state.running = true;
0 y a1 ?2 l' V0 a. S5 K - let fps = 24;/ I- v4 f: @) V R. \9 q- v
- da(g);//绘制底图
3 E4 C5 T2 F' O+ d - t.upload();
) }# Y5 M5 |1 ^/ h" @! r( F - let k = 0;- f8 t8 Y9 R, I( e3 M+ X
- let ti = Date.now();
& `0 f% ^, l3 S- |* m0 B - let rt = 0;
- y7 T# e% j4 l6 E* T2 A$ C9 q0 G - smooth = (k, v) => {// 平滑变化
9 q4 i7 i- n1 }. P1 [ B - if (v > k) return k;9 E2 C4 w+ Q O$ U! M/ o6 N7 l
- if (k < 0) return 0;- l W1 T' r+ `9 z Q8 a
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: K4 X$ b- P. o& U, g* y
- }0 M3 r3 i8 ]! o+ l" }* j% ?: ~7 T, _7 C
- run = () => {// 新线程8 r j" Q7 Y0 x- Y) E" R9 {
- let id = Thread.currentThread().getId();& c% [& A, a# c1 Z1 c
- print("Thread start:" + id);
% W% r' q: O( v" r$ H9 J - while (state.running) {% o( l8 p* J4 O" |- o/ Z# N/ ?
- try {0 p5 |' h# x; L+ ^
- k += (Date.now() - ti) / 1000 * 0.2;; Q) r T1 k, J% |. D
- ti = Date.now();
/ {# A* H2 m4 z) k: Q) z - if (k > 1.5) {
/ [4 P' q7 ?0 S' }8 Z2 v0 m' O$ d - k = 0;5 o# ^5 W3 |( m# L. Z7 _
- }" d x6 q1 D7 Y- x
- setComp(g, 1);) t5 ?0 i" n" o, G' j! x3 B+ B I$ }+ ^
- da(g);. r2 v. y9 Z3 ?% L
- let kk = smooth(1, k);//平滑切换透明度
/ J# E3 c( p% `. b" f) ?, h$ R - setComp(g, kk);
. \& [! ]& `" I* O7 p - db(g);
; P7 v# d! e9 y3 e - t.upload();
% |/ j P: ~8 z5 U n) v; H, W - ctx.setDebugInfo("rt" ,Date.now() - ti);9 y' r' S3 r, _5 i- }* \1 G
- ctx.setDebugInfo("k", k);
5 V) i0 H0 ^( c" K, ?' K2 W - ctx.setDebugInfo("sm", kk);
/ C0 v B7 d. c5 a, }8 l+ D - rt = Date.now() - ti;
: M5 O& D8 B& p: f F4 u - Thread.sleep(ck(rt - 1000 / fps));0 y* i) F+ P8 o2 X% J" q
- ctx.setDebugInfo("error", 0)
$ r6 \8 f, |& m- H! b. } - } catch (e) {' F: i3 z3 J3 Y w- J1 P( w
- ctx.setDebugInfo("error", e);
& \9 Z$ g% F+ ]! T0 M/ K7 K4 ~ - }
: m$ l) ~; P; ~/ U& f - }1 l5 _4 t5 W' _7 W6 @' g
- print("Thread end:" + id);7 n" u3 |& P$ {( f* O4 w% x
- }* H. o+ }6 ^+ ]
- let th = new Thread(run, "qiehuan");5 E; B: N0 F* h n+ r" O# v. d. ?
- th.start();
0 R2 O" ?% ?: t9 N- W* f) B! ^5 c9 ]) | - }
% [4 f" N% P4 X
& N# v7 D6 {4 S7 }; G3 U- function render(ctx, state, entity) {
6 o* F) x2 g9 S - state.f.tick();
% }) L, G6 ? | - }7 ]- D2 X) B0 d& p# n
! a9 s4 L1 u: O3 h. D/ h4 i- function dispose(ctx, state, entity) {
m; w) |6 d1 V4 `, J - print("Dispose");& y$ o2 i. a* e; d/ q
- state.running = false;" @) N$ o1 {1 ~5 K1 O5 B: y k
- state.f.close();
+ I; t: [; {! Z) S - }' F8 S# b3 q8 F6 E+ ~
- 4 X* V- P0 L# \+ g
- function setComp(g, value) {
9 d* C5 _) l- L% ] A - g.setComposite(AlphaComposite.SrcOver.derive(value));
. g5 Q: K2 k0 V3 g - }
复制代码 # l4 a, g0 `* i
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)$ S$ C2 s- J2 F3 o
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