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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。
7 A* D* P9 M5 `7 \. d- importPackage (java.lang);) p/ b* i% x t* T# Y
- importPackage (java.awt);
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$ c; I i6 V4 G4 `0 a9 ~- include(Resources.id("mtrsteamloco:library/code/face.js"));' R" V/ O! K6 Y" _3 d
- 3 R/ g j3 q' E0 K7 `
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
+ w+ |. e( J( F5 \) w; w9 n
! Z6 X$ @! O9 b4 m/ e- function getW(str, font) {
/ T# y: K+ |( ?8 S, } - let frc = Resources.getFontRenderContext();5 f1 o% u- M" a! t, {
- bounds = font.getStringBounds(str, frc);
9 G; [$ N3 g, b% ~ o1 w( c - return Math.ceil(bounds.getWidth());
/ w. N& R6 _$ k: B" c0 N - }
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# x) H: N! }0 z2 G3 `+ R- da = (g) => {//底图绘制- _. w$ s6 T5 f" \. H8 z8 |
- g.setColor(Color.BLACK);
" J. b: \: W( ^5 |8 p - g.fillRect(0, 0, 400, 400);
5 i; s) y/ d; o7 T - }
: ?; B( v& v1 @: a( N+ m4 D
- j( Y' }9 l; W9 T, u' k- db = (g) => {//上层绘制- Q. l6 J9 L1 b) b8 P& [1 d1 I6 r
- g.setColor(Color.WHITE);
# d! \+ a+ [$ F ]! \ - g.fillRect(0, 0, 400, 400);( `# y0 j( k+ t- d
- g.setColor(Color.RED);
5 e( H" s: s( E2 v3 y - g.setFont(font0);5 N/ X x( b7 {* e+ n/ f/ g2 {, X. q: A
- let str = "晴纱是男娘";1 ?' r7 J3 ]' X, }* T
- let ww = 400;& h; h0 o1 G" N5 U/ {
- let w = getW(str, font0);
3 l- [ q# O3 A2 E: g - g.drawString(str, ww / 2 - w / 2, 200);0 x6 Q" L4 K, Y3 A2 O
- }
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- const mat = new Matrices();
, @3 d/ A: R- m4 C* S$ n: } - mat.translate(0, 0.5, 0);5 D; Y4 C" v& S* {- ]
% M& E% }, U) z# |- function create(ctx, state, entity) {8 l& b" B. R4 }# ?$ H
- let info = {
$ p- \6 F, i6 J! R& n* @ - ctx: ctx,' c# L7 M2 d* B3 R
- isTrain: false,
5 j- R+ L. O3 E2 u - matrices: [mat],
2 f( C" G: t7 G - texture: [400, 400],
7 z+ b% u6 b8 C - model: { V1 x$ Y+ m3 s' t0 u
- renderType: "light",+ t" a6 q: u, I8 h1 A% K- G3 [
- size: [1, 1],8 j0 }2 U. W4 s* \% Y
- uvSize: [1, 1]8 g5 c9 k5 m$ p$ J- ^/ z" d+ E
- }
: K- s3 U: x% ~' O1 ]/ f6 b" p; R* D - }
9 |9 h( \4 L: e - let f = new Face(info);
0 g0 d( F: d% F8 } - state.f = f;
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- let t = f.texture;* J5 K% E; h7 T7 \1 f
- let g = t.graphics;
' S1 V O0 }5 Y4 z/ `! Q - state.running = true;
6 d2 E/ G @7 e) W# l* { - let fps = 24;
2 d6 p# N, J; a2 ?9 G0 E; A - da(g);//绘制底图9 o+ Y3 @3 u3 T! L: k% j
- t.upload();2 D5 ]- ]$ c! ^! j
- let k = 0;2 j4 v" u7 A, W) n
- let ti = Date.now();
& o9 f1 v& K$ s9 w! x ]! d - let rt = 0;
! `; f4 d( Y0 D- z, g- D- V$ j - smooth = (k, v) => {// 平滑变化* Y1 N: f; H+ d/ V
- if (v > k) return k;4 A6 S: J1 t% D! Q" a9 s, a8 p
- if (k < 0) return 0;1 n2 W( T) x+ P( d# L7 ]
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
$ x5 \, x. u" ?+ L# {0 W - }
?6 V! R$ ^8 g7 P6 A9 H, q4 S: n - run = () => {// 新线程, |5 c8 p% T; L" O/ W
- let id = Thread.currentThread().getId();
( q+ S5 X& D, b. J2 _, z - print("Thread start:" + id);1 u J/ ^0 c& {
- while (state.running) {
4 Z! E$ H" A. y% @) B* Y; e9 J, t - try {9 e. z( L a! c; c* y
- k += (Date.now() - ti) / 1000 * 0.2;5 \: R- e! _9 y% ~
- ti = Date.now();
- D! ?. P2 h9 u - if (k > 1.5) {6 M' J+ w# O4 J% V
- k = 0;& S$ Q% }: a+ V; s- B L3 k
- }
) F* F* F( k2 I" X - setComp(g, 1);
9 B3 ~* U+ u: E - da(g);5 x1 Y( K; `6 @/ A* I: \( Z
- let kk = smooth(1, k);//平滑切换透明度$ X0 A; n. m9 m
- setComp(g, kk);
1 y H+ T# w7 J- b5 c: m) ?$ F - db(g);4 c2 d3 P& f2 q& z+ _, T3 P
- t.upload();
: U9 B' o6 [; r3 Y2 g! b - ctx.setDebugInfo("rt" ,Date.now() - ti);1 M; Z) c6 S% t# G* A2 v
- ctx.setDebugInfo("k", k);
) D/ v$ m. s9 [2 m. ~8 Z0 J' a! P - ctx.setDebugInfo("sm", kk);0 b7 z$ q1 ?7 G9 T1 [ C7 ?2 f' M R
- rt = Date.now() - ti;- b% i+ ~) X( J) b* ^- J
- Thread.sleep(ck(rt - 1000 / fps));
2 ?. M) S7 c# u L1 s' C2 Z - ctx.setDebugInfo("error", 0)9 ~* u: W: ?% s- \9 C7 X _
- } catch (e) {3 v! F* ^, S f- r( `0 s" _) w$ _
- ctx.setDebugInfo("error", e);5 ^; n9 ^; s. o5 T, u* ]4 F, |/ z1 C; ^
- }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
K/ H& t& e8 s5 q* a/ { - th.start();6 |. \. y2 L- k: w k, z
- }
3 o' t" k2 d" R - ; x4 M5 R/ k" P3 ]
- function render(ctx, state, entity) {
+ { I- `) V# K$ q) K - state.f.tick();: F! l0 |$ |6 F3 |+ x
- }6 r: l* s- d) x3 a
3 P+ B( |) B% ?1 P; r) K- function dispose(ctx, state, entity) {
( B3 d5 U! x; W - print("Dispose");
- B( ]( c! G, B! X& ? - state.running = false;7 \/ G5 y8 W9 e: A6 M- T6 E
- state.f.close();
+ w3 k2 K6 ] b, h. g/ [ - }: ]& t I) W M1 k) a$ h
: W9 |0 u; y, R6 u# |* n" @- function setComp(g, value) {
3 ]* i$ _. y6 y* Q# @) f0 H5 R - g.setComposite(AlphaComposite.SrcOver.derive(value));
! Z# h( O5 s. I+ c - }
复制代码
/ t5 \* h" r* 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。: K6 `4 \' ~9 ?. Z" Z
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' A7 m) T% z" G顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)! @, f8 ~/ A, t( W! x9 }
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