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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。 V& z2 C7 q; J; i7 N* m0 x$ V5 _
- importPackage (java.lang);
* j3 ~8 B O1 f( h' Z, u; ]( a - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
# x# w* A) q' }" ^" \- E6 }
' S4 q3 U6 `3 s" h4 n- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);4 m( c0 {: O \" Q( z" V8 C5 N& p
8 F6 D+ y7 G; o3 H# w; V' k6 n5 @- function getW(str, font) {0 b9 R4 C7 I2 e$ r. ~) Y0 r' f
- let frc = Resources.getFontRenderContext();
8 [, z6 c/ p0 _4 z @& K - bounds = font.getStringBounds(str, frc);' M2 K# g1 l8 i# a7 T
- return Math.ceil(bounds.getWidth()); X+ k- \7 B% D! T+ |
- } p3 f9 Q5 i1 |& ]' E7 |' k$ V
- ; M: e* Y5 A8 Q6 q9 {8 h* `
- da = (g) => {//底图绘制
2 f1 T0 U5 v5 w# M - g.setColor(Color.BLACK);0 E! x' M* W+ q$ T# r3 u' I
- g.fillRect(0, 0, 400, 400);
3 v4 A2 `% G; Y" L - }* E4 J& t( r4 H9 J- Q( I
: A3 C8 @% N/ \3 O5 o/ z9 c4 ?- db = (g) => {//上层绘制
7 e, k' u5 U: Q4 U - g.setColor(Color.WHITE);+ c2 v1 ~# E' `. S% u
- g.fillRect(0, 0, 400, 400);% k0 o; [1 h9 I% P. V
- g.setColor(Color.RED);
( ]$ S- h1 x; ?& f. P - g.setFont(font0);1 G) x" N+ U) {
- let str = "晴纱是男娘";
9 ^ z ^9 q9 L - let ww = 400;
" ]& E/ P0 Q# _$ E - let w = getW(str, font0);; X: D' P( D6 f( _
- g.drawString(str, ww / 2 - w / 2, 200);/ F. \/ B o' Z8 D" N3 [; ?5 X
- }
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' w3 X2 M$ G+ P9 F5 Z0 n- const mat = new Matrices();% Q% K& J5 V) {1 _2 C- V4 B. L
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
. e: _ q1 j* ~' p - let info = {
7 }* C: b8 M: `- K" r6 T1 J - ctx: ctx,0 x) F0 p, B" f
- isTrain: false,/ o% U& r- Q+ R: ]! `- }9 w
- matrices: [mat],: s5 E! q( j4 L d5 x
- texture: [400, 400],9 q, M. q: Z3 G" `5 z' V
- model: {" c- f7 P, E, t7 K) B( x1 z
- renderType: "light",
$ i n X4 M7 v - size: [1, 1],: S- s7 f d; o' E& z
- uvSize: [1, 1]
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- }
$ Y6 _. J( Y3 G H* a8 Q - let f = new Face(info);
6 s1 b8 y9 t( u* h) k/ p - state.f = f;
N# O* U9 O1 X9 D - / u0 ?* F9 v- g+ }; ^6 k8 C
- let t = f.texture;
) Z$ M( P% X: p$ a) A6 y - let g = t.graphics;
- F( E4 E1 e' y. d7 Q. b5 b7 j - state.running = true;
0 O5 j0 ?+ T" Q1 {- K7 {) T - let fps = 24;
5 Y1 h& d& F* I0 s# I6 s' C - da(g);//绘制底图9 m) I, u9 T6 o* d. j; g; \9 E
- t.upload();
1 C! B: m" s K2 ]) W - let k = 0;7 V4 r, L6 G, }# V R1 @
- let ti = Date.now();" a7 P; ?+ I9 v# _: d
- let rt = 0;( ?0 R2 G6 D5 N) y' A+ I/ G8 r1 }
- smooth = (k, v) => {// 平滑变化0 D1 O+ b N- b0 N
- if (v > k) return k;' O1 D" P, [- F+ {
- if (k < 0) return 0;9 K |0 @ H3 |8 b8 H
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;4 m% K% G" G" B- N& V' s
- }4 A* a! i. g( k* y6 l
- run = () => {// 新线程: ^- n6 \" [9 t8 J; k8 U
- let id = Thread.currentThread().getId();
8 A: v' M" G) i* j% W0 k0 A - print("Thread start:" + id);6 D. M- ^' p# l! K! Z! r
- while (state.running) {
- l" C% t+ w; }- R - try {
9 y1 {' u4 H) i6 p( o9 x - k += (Date.now() - ti) / 1000 * 0.2;6 I$ w. ?3 c9 }: ~/ ?+ K
- ti = Date.now();1 m/ z0 r6 O, F9 x6 w0 S% A
- if (k > 1.5) {. c1 Z2 r5 ^0 g7 |. H
- k = 0;
a% Y+ \6 p- \+ y - }
& }3 t8 o1 {8 V - setComp(g, 1);
+ e( d6 C& O& J% M, D - da(g);# D1 h# h3 Q: V$ s
- let kk = smooth(1, k);//平滑切换透明度( ]1 T6 M$ N: g& ^( v5 z
- setComp(g, kk);# a. z( ]0 ~- G: C) M* Y
- db(g);
" x* x4 H3 }/ V5 t5 I& J- e( n1 E6 D - t.upload();
" J X7 O0 W+ Y - ctx.setDebugInfo("rt" ,Date.now() - ti);- A$ o. w; R; y$ p! r3 \) e6 r% ~
- ctx.setDebugInfo("k", k);6 w- M% [& h' P; i5 p5 {
- ctx.setDebugInfo("sm", kk);% }$ z3 D3 m5 S
- rt = Date.now() - ti;) ?6 x' h( J2 u1 T
- Thread.sleep(ck(rt - 1000 / fps));/ c5 c. v- K: ?# d f
- ctx.setDebugInfo("error", 0)
" ^0 _' L# ~# _6 @3 P# M( u7 I! s - } catch (e) {! {; y { D: P/ ]7 a* v4 ^: t6 H
- ctx.setDebugInfo("error", e);
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- }) M2 Z( o* ]$ O7 G
- print("Thread end:" + id);$ p( V+ x/ n5 p( g9 A* i
- }
. F9 C _0 [) {7 m - let th = new Thread(run, "qiehuan");
$ i/ B% n7 g0 e1 d/ P, ^/ y - th.start();
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- + i$ D. @& O+ S1 i
- function render(ctx, state, entity) {
( F- } y7 Y: [' D5 ^3 L - state.f.tick();% I5 U4 ^5 z( p% o$ d& S
- }
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- function dispose(ctx, state, entity) {
$ \7 r* a" i8 a- a/ y - print("Dispose");
8 k5 i+ P2 `* H; q' t- F+ y - state.running = false;: O5 K; K1 C: L
- state.f.close();
5 L% r1 y; y' Z3 e n - }
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* p3 k# b& E8 C0 P) h- function setComp(g, value) {* d2 x7 h7 C( ]$ R( ~
- g.setComposite(AlphaComposite.SrcOver.derive(value));4 Q" Z5 _3 S# ?& }
- }
复制代码 4 f, f& t) @0 @3 g; Q0 Z
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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9 U* ]. g+ X# R0 r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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