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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。# f0 B2 D5 q$ b- b2 J% D
- importPackage (java.lang);% v! ?8 B+ C# z0 L3 Z" h
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js")); d: `! q$ N: j
& R: d% e G6 ?- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" z0 Y6 F8 L7 F, h1 t4 d- d9 b
9 p# I2 E5 H7 j1 t* H- function getW(str, font) {
5 i. X: r9 X( o0 J1 ~ - let frc = Resources.getFontRenderContext();. b7 ^- M, l. z" Z
- bounds = font.getStringBounds(str, frc);
# S( w& G# J/ ^2 Z s, y - return Math.ceil(bounds.getWidth());1 Z# x/ A2 D! k! F6 p
- }
& E+ ~3 @; i4 j/ w p" d
' r# N* K! X6 U( _, W/ ~- da = (g) => {//底图绘制
: |& S- D/ u! {6 r8 Q - g.setColor(Color.BLACK);
; A/ V$ K. C( Z0 V - g.fillRect(0, 0, 400, 400);
% r& ?! X) ^( z' B; H: p! ?& R - }& _! V" | B- I- U- s: ?
0 {7 q. Z# Z" X, @9 M3 Y7 s# C e- db = (g) => {//上层绘制: X; w& D/ V' |- o) g
- g.setColor(Color.WHITE);' R1 m7 ], f3 s5 Y" g: v
- g.fillRect(0, 0, 400, 400);
3 L9 e9 f; m! s3 ^! c8 n" k - g.setColor(Color.RED);
9 U$ @" b/ f9 s4 G - g.setFont(font0);
6 u; u5 i0 G: K( K' O1 A - let str = "晴纱是男娘";
8 _. ]% E& M& [& u# M - let ww = 400;+ Z6 Y @1 N" \; Q# j6 g; m8 \
- let w = getW(str, font0);
' V, F, i m; ]9 q' f: ?9 E - g.drawString(str, ww / 2 - w / 2, 200);
# W/ _$ {/ B) Q; {/ m5 K$ Z - }! T; c" S2 }& U, V' D' d
5 r2 j8 {4 f- p- const mat = new Matrices();
" i; D! n3 d1 S0 _. ` - mat.translate(0, 0.5, 0);* Y/ u! E. ~/ W0 r# f1 `8 A
6 m3 V. M" A: q4 z6 c* Q6 ~9 B' T- function create(ctx, state, entity) {
, D+ U0 w* E! j ]$ t0 k/ W - let info = {7 U( c8 ]2 p6 y0 X2 n$ E! B' X
- ctx: ctx,2 @+ Z7 }0 i8 Y
- isTrain: false,
! ~1 Q" F- A7 @: f% N' a - matrices: [mat], M+ n" O% t/ }+ x" a8 E
- texture: [400, 400],/ m6 i! \: |$ E4 Q
- model: {0 m" Z$ N9 s9 `$ c2 y% A
- renderType: "light",4 u& O4 ]. r! |1 C# l7 k
- size: [1, 1],
7 e) ~1 i# c) f. x& R' J- ^, y! i/ [ - uvSize: [1, 1]" \, i" [! A" r% H) n9 Z
- }
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, B) Y- g7 @2 b9 R2 Y+ J6 g - let f = new Face(info);& U, C# M, v8 Z5 {0 m
- state.f = f;/ l3 H, N* w% a1 \
- 7 Q3 `2 M e Y& t7 {9 u, d
- let t = f.texture;
2 G! ~# g4 D( ] - let g = t.graphics;
( b2 C' ?; h1 ]* a: k - state.running = true;
; | {1 {) |" ?# m b" X8 B - let fps = 24;
; ? ]" W! b0 A, p6 C1 E5 s9 w - da(g);//绘制底图" x$ |2 i1 ~& Y4 k" C1 N: G
- t.upload();6 z, z6 T& E9 I$ L/ Y2 z
- let k = 0;
* s+ x: Q# H7 j! v o - let ti = Date.now();6 ^3 p) G7 ^1 Z6 S+ |6 }, f
- let rt = 0;' `" v# ^" N1 u8 O/ o- x
- smooth = (k, v) => {// 平滑变化7 c, l5 s8 i6 K3 E4 L, J
- if (v > k) return k;: R; T& q1 {8 d( C
- if (k < 0) return 0;6 p2 Y" |8 R9 ^4 f
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
/ g' |; e4 T, @/ |0 n$ Z - }0 E. Q1 |7 R4 ~3 T9 J" g" U G! e
- run = () => {// 新线程
$ W& c" S8 {4 K. O L - let id = Thread.currentThread().getId();. {% {* W" l3 s6 g
- print("Thread start:" + id);' _! ~1 q. |4 U. _# E% k+ R' R
- while (state.running) {" ?+ K% Q* Z0 j. W
- try {
# N; H8 E, w. O$ S- ^0 m - k += (Date.now() - ti) / 1000 * 0.2;
3 X1 j& T( s% S- S - ti = Date.now();
" C# |. }3 N _ - if (k > 1.5) {
2 Z; K0 t/ M# C* ]- I- J - k = 0;" l* m' V9 {2 P
- }
C! O5 S# \% K+ Y - setComp(g, 1);' m. R4 n$ y+ q" X( `- \4 ~, Z
- da(g);- l6 N6 Y# A/ Y1 d) F! A
- let kk = smooth(1, k);//平滑切换透明度) J+ F; c3 Q* {) c" X. p
- setComp(g, kk);
! F& N* y& I5 y- ~0 w- B+ ~, r - db(g);' t' M8 r' b8 `3 `9 _& d
- t.upload(); U" w+ m' Y: s ~) r
- ctx.setDebugInfo("rt" ,Date.now() - ti);
9 C5 A( ]4 n! y# d8 b: }9 X- e - ctx.setDebugInfo("k", k);
0 B& ?" a. w, I) z - ctx.setDebugInfo("sm", kk);
4 I3 F( H4 x2 h3 v1 i o# r - rt = Date.now() - ti;% n3 w5 d* q# h
- Thread.sleep(ck(rt - 1000 / fps));
. t# i7 @4 P# q - ctx.setDebugInfo("error", 0)1 A* H4 `5 w7 ]( u) Z: R3 i
- } catch (e) {4 H* |3 m/ n6 D) x, t4 O3 |
- ctx.setDebugInfo("error", e);
% K9 m: z, H$ y8 {: a - }
, i7 y0 A1 ?0 f( h7 g - }8 Y2 H% `$ L8 ^! w- e
- print("Thread end:" + id);) Q) f& S: {$ s) j
- }
3 l8 w1 J% ]0 s* ?- w; R - let th = new Thread(run, "qiehuan");
9 y; G/ M ~; Q% g" O1 ^( |2 D9 H - th.start();
+ a9 k, H; m7 k# j6 N% ]9 p - }, v8 }8 ?) L8 q% Z" ^$ L8 G
! t# I6 V7 ~7 {* M9 k" v- function render(ctx, state, entity) {. C K* H6 v/ I5 M, Y% E
- state.f.tick();
: e8 ]: M# K9 \& ^: T- e% u - }
! }9 k9 t9 q1 }4 R) {' C
7 f1 G M6 Z, y P- function dispose(ctx, state, entity) {7 \9 Q6 X7 w, j5 W) Q; |- [
- print("Dispose");7 I% h5 f$ s$ k: e3 ^; P$ e
- state.running = false;7 N5 B: a% M& |: w9 z# n! g
- state.f.close();# E7 y H- C4 s2 O2 q) D6 q3 x
- }
/ K2 k/ d6 M- F3 z5 a6 A# d8 Q
8 f' [" Z' V f5 m! j) A- function setComp(g, value) {
( K- a7 Q0 k. e: T \ - g.setComposite(AlphaComposite.SrcOver.derive(value));
! A9 }. o! y$ a2 E8 r" @, s) M - }
复制代码
( r; Q/ V" p7 q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)( N% l, s! ?5 C* C+ U
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