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m) a% o; S' K$ m+ R# K. H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。% f9 m7 \# d. V7 w5 K
- importPackage (java.lang);2 E$ L0 b! M3 ^; T9 B
- importPackage (java.awt);
- {( L6 R3 z5 y9 d5 G - 9 A6 V/ x/ n+ [: ^9 a
- include(Resources.id("mtrsteamloco:library/code/face.js"));5 i- {7 M. `2 x) O8 G6 \5 b% E# L
- 4 U" E! h% f: x. x3 T/ o' L* r7 m
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, w4 Y8 _5 e3 b4 e5 V
- . s; M. H& y+ x% _% o- X) m! z
- function getW(str, font) {
# ]3 k% ?% w% Y0 u; R8 E3 D" M - let frc = Resources.getFontRenderContext();/ O% g6 t% ~9 G/ \( ]
- bounds = font.getStringBounds(str, frc);
5 ^' k$ y; [& o( I - return Math.ceil(bounds.getWidth());
5 k: B- C' _: B6 N: U7 S* u' ?9 Y - }
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6 X) e- P% B! m. ~! l- da = (g) => {//底图绘制6 d& M$ p7 n/ g9 ?% c* I9 }
- g.setColor(Color.BLACK);/ U P9 v+ a6 Z& ~
- g.fillRect(0, 0, 400, 400);6 Q/ J' l* k3 f O$ _
- }/ G1 \ J8 r0 Q) _2 P
3 k# b3 u9 Q9 F: F2 `( ]- db = (g) => {//上层绘制
! c- ~$ }" m( J5 a, b) V* i - g.setColor(Color.WHITE);2 J! z6 @: ]$ {2 J7 S% y/ r
- g.fillRect(0, 0, 400, 400);8 O, m1 [% @" b$ _9 {. i
- g.setColor(Color.RED);* C- n. ^: z) \1 G/ z
- g.setFont(font0);
/ ^) x% L* Y5 |0 Z+ @( P! T; ~ - let str = "晴纱是男娘";
5 y- k! |; {( M- L( L% O. _ - let ww = 400;9 E B% Z& J- s) b7 e
- let w = getW(str, font0);) i+ G7 f: N+ o$ r a
- g.drawString(str, ww / 2 - w / 2, 200);
* }$ j/ {+ _- q, {2 y; X - }
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- const mat = new Matrices();& R7 \% {4 F& Z+ D( E/ ]
- mat.translate(0, 0.5, 0);# v0 ]. D; g8 a, G+ R- R
) [' U& _+ u! _, G- n; ]; y& k- function create(ctx, state, entity) {
{3 O# i/ [' x9 w u - let info = {
9 [8 D# x8 ~4 P) n7 _ - ctx: ctx,
5 M. V. V7 O* X' o2 u - isTrain: false,
# c: M1 L* y- L# y) ?0 s - matrices: [mat],! o0 e; ]4 T. \' Q7 Z* g
- texture: [400, 400],
: Y3 Y9 Q4 v. |0 Y2 v7 U1 B9 k - model: {
. {4 X( s" t6 {6 n2 X3 ^ k; U - renderType: "light",- M$ k# l$ A8 p/ X4 D# t
- size: [1, 1],, i% z% [+ u" N) ^( @
- uvSize: [1, 1]
/ c4 t3 j m% O" E0 V - }1 D$ ?5 Y' ]$ y% x$ U: t
- }( X2 {. C3 L$ _% f# t
- let f = new Face(info);
- z: i2 m9 ?3 i* N - state.f = f;0 L$ n# y; g5 p u7 o" }5 ~+ W4 w
- 7 V6 h; {0 l! x; j
- let t = f.texture;5 I3 H, c: ^# a
- let g = t.graphics;
2 t4 H( i) g4 R# {! o5 F6 _! u - state.running = true;
' S( }! |9 P2 L. S& _ - let fps = 24;
2 X! l4 }! E$ n5 V8 r - da(g);//绘制底图
) C0 ~; Z( R2 t3 j0 }' p - t.upload();$ r3 P# X' ?$ l$ }
- let k = 0;
8 P8 { L# _# [; E0 b - let ti = Date.now();
/ o2 {2 E/ Y: E - let rt = 0;' D0 k3 A6 n; o& |& u+ @3 U3 p
- smooth = (k, v) => {// 平滑变化
! u! I2 W! N0 M% t - if (v > k) return k;
! k+ U% l- n# }& ? - if (k < 0) return 0;
1 r6 g+ ?% m& [6 |2 _9 j3 S - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) K, v/ Z: u P
- }) M$ O( Z! o' N1 l3 ]' ?5 h
- run = () => {// 新线程
. i \$ h' l7 c; p8 e* W, d- N4 i - let id = Thread.currentThread().getId();, f# k* f) S4 a$ ]
- print("Thread start:" + id);
7 s( r% }- } U$ M) y8 b, Q - while (state.running) {: T! j$ k/ W+ a/ Y9 v/ {* b
- try {
. Y9 H% K3 \4 v7 R* }; { - k += (Date.now() - ti) / 1000 * 0.2;, U+ ?7 P/ d$ n/ E: N
- ti = Date.now();
. ~- c( u9 m; ^/ F6 N% _ - if (k > 1.5) {
6 |$ `+ k5 E, ?* ]0 } - k = 0;5 V. @, e! I6 l2 n3 q' ^# z" i8 K
- }6 c+ y9 d5 y8 j
- setComp(g, 1);$ O2 }0 W2 @* _- v
- da(g);6 R! k) |+ f/ B0 F. K, l
- let kk = smooth(1, k);//平滑切换透明度" c. Y1 l! Q! A' l) H9 a- `
- setComp(g, kk);' b2 \% [. u/ C
- db(g);9 [+ n0 C. t1 B/ A( ~
- t.upload();- u0 ?8 y5 P) N. r4 E# P1 g0 F* L9 c0 h
- ctx.setDebugInfo("rt" ,Date.now() - ti);8 |0 U0 n$ y f) O* x
- ctx.setDebugInfo("k", k);
& U" p* _! K: @0 N# C - ctx.setDebugInfo("sm", kk);
. R" G7 e: v6 }+ t) c b9 L - rt = Date.now() - ti;
5 S' W0 E6 g6 G% O2 R. `, _ - Thread.sleep(ck(rt - 1000 / fps));
2 O2 }+ p2 w) Z3 m3 Z" W - ctx.setDebugInfo("error", 0)
7 B0 S# G; n, y4 t) \ - } catch (e) {
5 B5 v/ _& k5 w6 O - ctx.setDebugInfo("error", e);- `, K& }1 W" t; z1 p- o
- }
5 y& b( q y4 O5 \! h - }
3 V2 Q# L7 L8 q3 N0 y - print("Thread end:" + id);
" y/ {! `4 b, k: r8 B+ ?$ z - }
* u: i! T5 N1 Z3 ], |- `* ^- f - let th = new Thread(run, "qiehuan");
7 Z. g' K0 X8 X# j - th.start();
* d' l4 o: I' e9 @ - }( I1 I3 p/ Q- d' ?* \# G- M, O6 ?
7 v+ E. |9 s8 Y- L( q1 X5 T$ i( w- function render(ctx, state, entity) {/ E5 h; \0 j2 S. Q
- state.f.tick();
3 ]0 I5 ~' O; N - }2 Y" a, {' m% X4 h( V* Q; p
- T1 @6 G8 m+ p- function dispose(ctx, state, entity) {$ _3 {! L2 ]( E9 m! o) s
- print("Dispose");
) h# K- ^1 M. K0 Q0 _, W) f/ { - state.running = false;
% {; I2 K/ q9 C8 a. L; Z8 T { - state.f.close();$ Z$ j! o6 L# q6 V
- }7 x$ a' |9 Y# M0 ^4 `
7 R6 y( v4 h. x1 I. c4 ~- function setComp(g, value) {7 v$ W" `$ p R. D
- g.setComposite(AlphaComposite.SrcOver.derive(value));
6 f. [0 |' q3 R" Q& l - }
复制代码 8 z1 P9 W8 J m3 B
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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