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3 s# L5 v; h) l* K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。
, y0 e( F! @! [/ G8 X& x# M* o8 X. h- importPackage (java.lang);# Q8 v. v: }$ s0 a0 e9 P+ P/ Z
- importPackage (java.awt);: c: c8 Z2 f3 c8 N2 v9 r8 j
- / ]1 `0 [! ~* k h( n1 y
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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$ @2 M( ^5 E% u4 Q9 t( |8 H3 j- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);4 z1 h4 p- z: n3 j1 C
1 J( V0 G' n" i/ p5 H8 V- function getW(str, font) {! j7 p* {+ D! t. y; C f
- let frc = Resources.getFontRenderContext();
8 S' x! B, m5 t$ H( A5 h - bounds = font.getStringBounds(str, frc);0 P9 \0 b3 B( I" k* u$ E
- return Math.ceil(bounds.getWidth());( g/ z" K* x( c# C( i
- }
- x% \9 N4 y4 Y7 F" W: Z3 F; o - . {' S6 ]; Q; e2 a+ x# I
- da = (g) => {//底图绘制7 N* c7 I8 j9 B* m/ L J
- g.setColor(Color.BLACK);
1 i( e7 b- v' u, ?+ \ - g.fillRect(0, 0, 400, 400);
+ W t7 Q- Z( W) ]: \( l7 n - }$ Z- X) a, X v% k' p" O
6 m* A3 s1 m8 G' e: \9 l- db = (g) => {//上层绘制
, U8 j; R: n9 ]- t4 j - g.setColor(Color.WHITE);2 A! \" l5 h9 F
- g.fillRect(0, 0, 400, 400);1 P7 k7 n. z. B5 I9 B
- g.setColor(Color.RED);* v$ }2 |" d2 c" x
- g.setFont(font0);
) P. w& X4 `' r5 j! S - let str = "晴纱是男娘"; n( W) c' W8 _5 B6 J( r8 Q: a
- let ww = 400;
* Y+ t* H) K! B% w, U - let w = getW(str, font0);
! T2 J* S3 T0 M0 m, \6 Z+ J1 G0 m - g.drawString(str, ww / 2 - w / 2, 200);
% z/ U- _# `- I& I1 F - }# m7 Z" v: M \ Z5 n
+ w& ^+ G; g& Q! {8 D M4 w J- const mat = new Matrices();7 ?: w# F+ s, G6 ^9 V: U6 S# ]
- mat.translate(0, 0.5, 0);) |$ B9 _! C! A5 D3 }
! C5 O) P4 V4 a3 t- function create(ctx, state, entity) {
" Z8 i( i: c6 q1 U - let info = {& v% r1 Y0 S6 V9 \, u3 q, b
- ctx: ctx,2 t/ Z; n3 }( L& ]5 b
- isTrain: false,
7 K8 [9 J1 n0 @6 o6 Z - matrices: [mat],
: X# z+ E5 ^8 W$ G- l2 c - texture: [400, 400],
( V- U6 h& c+ A - model: {/ d% r! V5 R: Z' V8 ?
- renderType: "light"," W( v6 g8 j. B
- size: [1, 1]," X5 H) a, X! j: R1 R6 ]& L- a
- uvSize: [1, 1]- R- J: ^# C7 x
- }1 w8 `0 r! H8 ~+ L6 A
- }9 @, c0 r' k3 h) B( b% t" y& w3 D& o
- let f = new Face(info);
: `6 _8 J9 e( @) h% @: B+ M2 Y2 W2 M" l - state.f = f;( p/ L$ X6 f% B/ Q; ~2 }
X8 ^* d3 _& k- J0 g- let t = f.texture;
4 E* ?: x" O/ p T% K' D- T - let g = t.graphics;# a2 p; }0 J+ i( _
- state.running = true;
8 u) P( [9 G$ A( B% g7 B - let fps = 24;/ M" \) H. J4 Y( S
- da(g);//绘制底图
: A1 N0 h$ d8 \, B+ z, j - t.upload();% I; E4 `! x& V& v. E9 w
- let k = 0;1 ]# F7 t( ]& {
- let ti = Date.now();
* a/ Y& m: g0 c9 e, t9 u - let rt = 0;
+ ?0 r+ ^ G* E. u - smooth = (k, v) => {// 平滑变化6 g; v( N1 G1 \) n: j$ a
- if (v > k) return k;
6 N5 h" j$ Y" [, i& y O - if (k < 0) return 0;" f: k$ Q7 T$ o8 C. E
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
- w% g2 @; w& [# M5 G& [ - }$ Q; y$ ^$ |) n) ~- z# w8 J
- run = () => {// 新线程
& ~: r6 d0 W3 _# q - let id = Thread.currentThread().getId();+ K' A- l$ e% G5 u& R4 }, W
- print("Thread start:" + id);9 C% C O% W; f( O# E; `) v; x
- while (state.running) {7 q$ J9 r( L' n* K% W+ D% I
- try {
8 ~2 l; Y; X1 F% s - k += (Date.now() - ti) / 1000 * 0.2;) h' p4 c: W* c/ c$ z+ d
- ti = Date.now();8 e' G+ u; K% l" J/ |5 c
- if (k > 1.5) {
% l, |7 d# ?3 L; z6 S/ U - k = 0;5 B5 m0 Z* F0 \, L! g3 O; Y( q5 a0 z0 [
- }0 I- ], o# e# r( ~, L+ ?3 F+ ~1 i; V
- setComp(g, 1);
0 Q/ l) H6 x6 g" N - da(g);
1 o! u k" r* h' ^% b$ K - let kk = smooth(1, k);//平滑切换透明度7 O0 ^* s) d) p8 X t/ `2 s
- setComp(g, kk);+ K: P6 I4 b! @$ e
- db(g);1 ]* D9 s" S" c+ n! D i/ K
- t.upload();
@) P4 `# c7 Y2 Z: C - ctx.setDebugInfo("rt" ,Date.now() - ti);. b1 X- [# s6 C4 r- w2 [8 n
- ctx.setDebugInfo("k", k);
' |1 ~% ]/ ^. M( _7 R - ctx.setDebugInfo("sm", kk);
7 f& u% M- d5 k1 O - rt = Date.now() - ti;
% `6 `5 q' z' u - Thread.sleep(ck(rt - 1000 / fps));: s+ b) ^- A6 J4 \" r
- ctx.setDebugInfo("error", 0), \1 o3 @) Z* M
- } catch (e) {: S+ s2 L1 A2 q/ Z- V) j' u
- ctx.setDebugInfo("error", e);
9 K# q0 _2 h0 L, @2 B: p! W - }2 F2 b+ _7 V9 ^+ T% H" g0 K
- }
+ S) B0 [) P8 u0 a L - print("Thread end:" + id);
* |2 r+ A# [# e( ^ - }
& H( r/ w$ t) N - let th = new Thread(run, "qiehuan");+ R( H7 o0 C3 K' c3 H
- th.start();3 I; v# W0 S. c2 \) W3 @+ E' ?, B
- }
8 [9 ~* x. `; c3 N - ( M, D9 Q8 F- R6 Q; u2 W
- function render(ctx, state, entity) {
# T4 e3 O: y1 f' }$ Z5 ~ - state.f.tick();" v+ U- W$ i1 ^4 \; r$ i4 S9 e
- }
& x- |) m+ M, k; A# m
- x3 M; {0 R' L) y: r3 J- function dispose(ctx, state, entity) {; s) m+ N! X$ T7 @
- print("Dispose");
. \5 t( A% [2 n7 z7 K s9 Y8 Q - state.running = false;
+ Z3 h" r6 G) v% {6 [- ^ - state.f.close();
0 j G+ i4 J/ o9 n1 Q - }
T4 b/ M' M" l- C6 D - 6 `! [1 p5 [" u' U
- function setComp(g, value) {# b6 y" e! b& l; a5 o5 Q! r
- g.setComposite(AlphaComposite.SrcOver.derive(value));. M. g) q/ y+ [& e5 s6 j1 y* T
- }
复制代码 % w- I' D7 y' v" e6 y, q8 M4 ^
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。
( k9 J2 W5 U) q6 y! z! j: I7 r7 V; x; \- ]. p+ c+ V
- c+ Q% e* Q% _顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下): \3 {3 b1 ]' g$ H6 J& J/ ~
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