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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。0 J! B& V! ~7 i* y/ [ L
- importPackage (java.lang);
G6 v" Z' Z. T, T ] - importPackage (java.awt);
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& n4 a! b7 v) C! d9 G: p- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);/ A6 {8 |* k4 Z9 m' u& Q" ]
- + K4 c: O" p& ], n' b4 f c1 r' m
- function getW(str, font) {- C: R$ U6 s/ c' f; n* t
- let frc = Resources.getFontRenderContext();. M4 y# g) h" y9 N9 k4 I
- bounds = font.getStringBounds(str, frc);5 s* K6 C# N3 f6 T2 @, w+ D
- return Math.ceil(bounds.getWidth());
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- : Y' l4 f3 n/ P7 H" W! c' ]
- da = (g) => {//底图绘制9 G0 O, F, L8 K1 Z/ J9 u
- g.setColor(Color.BLACK);
9 s2 r! o4 `* D$ B8 Q - g.fillRect(0, 0, 400, 400);
# n( F. |+ w1 c" p7 j9 O5 r - }
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- db = (g) => {//上层绘制; X' R( U* S7 e6 g
- g.setColor(Color.WHITE);
! H. |. p# S" @5 y% ^8 z - g.fillRect(0, 0, 400, 400);+ V! ]" o) f4 V5 |3 F
- g.setColor(Color.RED);
5 V% s+ N: Q; D1 t# R - g.setFont(font0);8 `; }& W p9 E; H; U4 j/ Y
- let str = "晴纱是男娘";
# W0 m9 ]3 l/ s& ~% X - let ww = 400;
7 t' [! v7 f5 u" f8 m% a( p2 `, L - let w = getW(str, font0);
2 Q3 F4 ~5 a7 Z6 ^ - g.drawString(str, ww / 2 - w / 2, 200);
5 `: A" J8 ]9 b# h - }
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- const mat = new Matrices();
1 x5 f, n j4 ?; g - mat.translate(0, 0.5, 0);
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4 s1 `/ Y3 t) g2 R- function create(ctx, state, entity) {# D0 x1 Y' j: [: n0 P# |; q
- let info = {
# n* M& j2 q# J8 b% `$ v+ y - ctx: ctx,
3 m5 o" M0 ], z6 P - isTrain: false,* U+ }, h$ H4 E4 S* |( X. {. `2 y# m' @
- matrices: [mat]," t6 M# L$ j5 v6 j" H4 t' N" X
- texture: [400, 400],
D+ P; A% g- ^! D2 K - model: {
( `! S- _" ^9 Z( a! o - renderType: "light",
, O) M) w h' ?2 y6 n! G% m - size: [1, 1],
( X5 D. _' I- C. \, J. o - uvSize: [1, 1]
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- }
3 L8 H( R8 O" c- Q$ U$ p7 f/ V. R - let f = new Face(info);
4 {1 V, T! L% |- { - state.f = f;
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- let t = f.texture;: T! Y# `6 D( {3 B+ a4 s0 q3 W
- let g = t.graphics;5 S4 [5 ?+ ]. i5 N
- state.running = true;
, _- `4 _( z- c1 J A - let fps = 24;
" H3 K( X- n$ Q$ H6 {& Z - da(g);//绘制底图
# a- n+ B6 s) S: Q" r - t.upload();
Y I8 U( \# a, H$ H3 {4 y! u4 F. z - let k = 0;2 e# `8 i, t4 ]% L, M6 U
- let ti = Date.now();
' D1 Q) f- T$ h& b$ J - let rt = 0;9 G6 }$ O4 w+ M) ]6 S
- smooth = (k, v) => {// 平滑变化1 A. A6 G8 l8 P6 G3 J
- if (v > k) return k;+ b5 t; N; I/ N, d5 s. n! s1 Q
- if (k < 0) return 0;
6 Z# |& F7 g2 u- p8 j1 s* J3 }0 r9 a2 v - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) Q# g; j% p7 P
- }
2 j" A; ]8 f& U P& j, i, N- b - run = () => {// 新线程
6 C0 K Z8 E& I3 g) Z; y - let id = Thread.currentThread().getId();4 S- T9 x% x: b3 d" @
- print("Thread start:" + id);6 N, B& x+ |5 ^* Z) p, D
- while (state.running) {
- c3 N4 G$ ]* e- E9 D7 ? - try {
7 G+ p; V. d+ u( x - k += (Date.now() - ti) / 1000 * 0.2; H A" F) d- Z" L+ l" V* @1 }, C
- ti = Date.now();! b R4 Q/ }: |3 ~
- if (k > 1.5) {" p( S3 W7 g$ ]( P4 G, c
- k = 0;
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- setComp(g, 1);* I' z" m( _$ a
- da(g);
6 Y( o2 ?( {2 n( w+ ?3 G, [$ U - let kk = smooth(1, k);//平滑切换透明度
\! s5 I. h0 ?! X; Y9 F2 y2 F2 ` - setComp(g, kk);3 M% I' `2 ^- o: x; y! R
- db(g);1 _. `: Q# t5 w9 R
- t.upload();
. |& R" }: T3 H/ Y M) J - ctx.setDebugInfo("rt" ,Date.now() - ti);/ Q6 T1 F0 Z/ D! ~6 U6 n' G
- ctx.setDebugInfo("k", k);; s: s" \" c; F8 p
- ctx.setDebugInfo("sm", kk);
; F. }$ ?5 K- _% w - rt = Date.now() - ti;
( U/ P$ D9 C( n* L' |* { - Thread.sleep(ck(rt - 1000 / fps));
3 f: C$ ?/ W$ C) j/ K - ctx.setDebugInfo("error", 0)
# z- P6 X2 D" a: F5 X - } catch (e) {* o* c5 b( P( n2 G3 u- B2 _
- ctx.setDebugInfo("error", e);
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- }
7 y' I5 Z' @. u( `% M& D - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
( T3 Q8 ]0 I- g' k }6 y3 q - th.start();
* u# Z% M; n' u& p - }
* x; D* p! H0 s% O4 v% [
9 o8 A% h% W7 y" f- function render(ctx, state, entity) {
( s% e/ l' _, ~# y0 J0 I$ @ w - state.f.tick();1 H, G3 r0 _0 P. s2 [. D
- }
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, n# l" X: I" d4 D- function dispose(ctx, state, entity) {
1 I: B9 C; e& D% i, x* ^4 U - print("Dispose"); |% B: r# J) A4 G4 D! R K
- state.running = false;* `2 }1 w9 U+ p0 R
- state.f.close();
) J# r$ R3 L$ m& n' s; p - }
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- function setComp(g, value) {
* j7 [" O( k$ m - g.setComposite(AlphaComposite.SrcOver.derive(value));: ?: f* @. a. I2 ?- \" u
- }
复制代码
2 X9 F x' C/ z' d+ }" ~# e, _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。* T1 b x8 M% i* {- {4 O
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. c3 ^9 ^% M: R5 n, x3 z/ D' s顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)7 b( d9 s) K8 f# s/ s
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