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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。
) ]! |6 X( I% ~- importPackage (java.lang);
, i P, X2 W- Y' \$ H, ^ - importPackage (java.awt);
% j# I; C. ~: O+ N - ) i; S' s+ A- W) ^
- include(Resources.id("mtrsteamloco:library/code/face.js"));6 c4 v( x4 ~6 h/ q% c
2 x/ f0 }. k8 p! o6 \5 F% D- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
3 }, h. o+ ~. H6 i( Z7 ?
( Z0 T! H) E6 d3 \0 \. i- function getW(str, font) {- |+ g. Z4 [4 b" Q0 `; z4 {$ [
- let frc = Resources.getFontRenderContext();
, _" @( ]; ?5 D" O3 M - bounds = font.getStringBounds(str, frc);
- n: T# W; z8 X# j ^* j( ]6 V, q& D - return Math.ceil(bounds.getWidth());/ a3 O6 S/ q( u
- }
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7 E/ L9 J& V& o- da = (g) => {//底图绘制
3 p. n# e% k# d/ u4 l/ k& A - g.setColor(Color.BLACK);! o8 ?! z/ ]& [
- g.fillRect(0, 0, 400, 400);
' F# F- t' ?! d - }
! w7 U* L0 ~' ^4 n) x; ? - , l; c$ t3 q' E; m
- db = (g) => {//上层绘制
* h3 T- k/ U# o6 ^6 k) P5 t7 p - g.setColor(Color.WHITE);
2 u6 n7 Q% i% r1 @; K. U2 X - g.fillRect(0, 0, 400, 400);# p7 f9 Q5 L5 m+ |( \, A
- g.setColor(Color.RED);
& P/ D8 v, U! p - g.setFont(font0);; F7 r# }: K0 i4 Y `
- let str = "晴纱是男娘";
/ \5 ^! x; P0 \( O) ?& U$ Y" U" R - let ww = 400;
x* ~ o8 ?4 Q: W4 T; E - let w = getW(str, font0);: [: h: K2 Y" g
- g.drawString(str, ww / 2 - w / 2, 200);- @: f2 c6 M: i5 L8 T. Y
- }/ P- O8 V( D u1 M4 `% Z
% H. a4 i0 S4 T3 y; r4 E- const mat = new Matrices();
9 S! j% B- s" ? - mat.translate(0, 0.5, 0);
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. X; `. n4 L: U$ N4 \- function create(ctx, state, entity) {
6 s7 ?7 ?7 w, H7 s1 { - let info = {
5 ]" Q( h2 q9 y# B1 x! a+ b# @ ? - ctx: ctx,# c6 W. a$ u, F* ?- g4 L8 @. ]
- isTrain: false,
% Y& `0 U8 y5 M$ n - matrices: [mat],; d$ {! `0 w; O' G& P
- texture: [400, 400],
$ O g1 r! z0 m6 O) Y - model: {1 M Z6 v5 Z1 N3 A- A; ^+ T; I0 f& ~$ I
- renderType: "light",% o5 t3 U5 P2 H7 d# L$ J. _7 ^
- size: [1, 1],
. J0 X( @( M1 b/ Q4 I4 V" S - uvSize: [1, 1]: o, ]; O0 F% V5 C% [
- }# x. K. R/ i% a/ Q1 q# |7 j& K
- }' s/ i# g' B$ r% k+ Q0 _
- let f = new Face(info);5 y' d/ n) R# T& e y
- state.f = f;
: S+ x$ Y! E1 ^7 l/ G* x- a" q0 q - 7 {9 e1 S6 Z9 p. g% p
- let t = f.texture;
5 B& K8 m* [( i - let g = t.graphics;
+ b7 C( E6 p6 w( e+ \% } - state.running = true;" {9 d* K) [$ U0 N5 S- W
- let fps = 24;
' U. g6 A6 O; m) ?2 x - da(g);//绘制底图7 N( C- i0 i" j) w, z+ g5 N' p( v
- t.upload();6 X9 l, c2 @7 Y: g; U& `9 h
- let k = 0;
( ^& B( \ s* Q/ a) z - let ti = Date.now();
@ |8 h# ~2 [& R5 @ - let rt = 0; C" n8 E$ n k1 X7 V
- smooth = (k, v) => {// 平滑变化
" j7 l: d; \# d2 h) K$ ]8 }- n2 I - if (v > k) return k;' c- @% S/ P! H
- if (k < 0) return 0;6 f! G' F8 e5 Q
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;/ u: X$ Z& R. `: |" P1 L+ e1 |
- }
: t$ l/ y3 P9 Y2 d8 y - run = () => {// 新线程
& y- ?( M8 v5 e- r - let id = Thread.currentThread().getId();
! S4 N! I2 X" R - print("Thread start:" + id);
" l- O( j, X8 T6 h# ] - while (state.running) {
4 ]2 d$ ?5 ]1 b( \% u: D - try {$ V s; t _3 o+ h7 X* _
- k += (Date.now() - ti) / 1000 * 0.2;8 r4 |1 o( b( r" B0 ^! T% i0 I
- ti = Date.now();$ H5 W+ q6 s. W; F! \
- if (k > 1.5) {
2 J9 t, l* I) x8 w& y, w - k = 0;
/ @, b8 S# _; C K0 [) S8 W - }
( l- g# p W- D/ t7 ^ - setComp(g, 1);5 j& Z v3 E- p {) S" m" B4 b
- da(g);
, C# h) ^& F. M; v# s( E - let kk = smooth(1, k);//平滑切换透明度
: L5 M* T( r8 v/ v - setComp(g, kk);/ ?, _5 E: R3 G8 f7 g& v l# ]
- db(g);4 V* L# v; U4 v
- t.upload();3 k' o- i: O$ r" Z2 j/ R
- ctx.setDebugInfo("rt" ,Date.now() - ti);; x. [2 G( e* Y) z+ L$ ]" {+ O
- ctx.setDebugInfo("k", k);
- s* U7 ?: ^* n - ctx.setDebugInfo("sm", kk);
, T" J9 S T0 }( r" p" u - rt = Date.now() - ti;
3 L4 h- `6 W* K1 v - Thread.sleep(ck(rt - 1000 / fps));0 ~) K/ h u$ \+ {
- ctx.setDebugInfo("error", 0)
* f# | C8 y& R3 L/ N4 I( E' P+ A - } catch (e) {% B4 n, }$ J- P
- ctx.setDebugInfo("error", e);
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- }1 u% n- v* k7 Z2 `
- print("Thread end:" + id);6 Q/ V( {6 l: q
- }
# ~% q% u/ ?( C* |1 Y - let th = new Thread(run, "qiehuan");
: h. o2 F5 W3 S& v, X - th.start();
) e' W( T& i7 x* g* ? - }+ Q) _8 H" F: m. Y# a9 @$ D
J c+ @" S( |* r- function render(ctx, state, entity) {+ G* {# v1 ]3 t1 a* y
- state.f.tick();, J+ ~6 F/ h0 {3 C( h/ z- a- V
- }8 ~% t b0 ]" ]% }/ O, G9 `9 D }
7 v: P: P4 ?7 O. o) C p1 d- function dispose(ctx, state, entity) {
+ l1 N2 O# `' K" d% V - print("Dispose");
% R$ d4 ] Y; M, E9 E - state.running = false;6 F Q2 }% ^, d7 h! y: {- }
- state.f.close();3 v( p1 Y2 l$ n6 f( e% A% @' M8 E
- }
1 G6 H, B! z) J: B( z
* X" a5 I: I+ d$ ?. W' O- function setComp(g, value) {- _( o4 W5 L! N" ?
- g.setComposite(AlphaComposite.SrcOver.derive(value));
7 B! D" N) Z' i. K - }
复制代码 # x# N5 p* O% 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)
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