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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。
% K K. m( C. P6 f+ z7 `- importPackage (java.lang);3 D) i. Z) I+ l" a
- importPackage (java.awt);
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! Z# T& [1 K! d3 M8 L; G- _1 e: Q- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, `7 Z6 O2 N+ w. d7 {
+ W/ i. O& G. {; r( Q- function getW(str, font) {
8 R% c* ~, i& y0 X* c9 r - let frc = Resources.getFontRenderContext();$ S) E# {* U1 V9 |3 T! R6 l/ h3 |
- bounds = font.getStringBounds(str, frc);0 B( v& _$ C1 P8 F5 g: B( u$ [3 S
- return Math.ceil(bounds.getWidth()); L# \) |2 g. p% F2 S* O, E
- }. |* V, z+ v% r' T
- 2 y1 {7 ^! s. O" {
- da = (g) => {//底图绘制* r3 _6 }! W1 D. M
- g.setColor(Color.BLACK);
" \& \1 P6 o4 o. r - g.fillRect(0, 0, 400, 400);
& I9 r, J0 x# U; Z, @& L2 L) R3 W - }
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- db = (g) => {//上层绘制
: z8 e7 W3 d2 I: d' p3 R& Z9 o - g.setColor(Color.WHITE);, _3 o' F7 D% A( H
- g.fillRect(0, 0, 400, 400);+ K. q. O! h8 d. f
- g.setColor(Color.RED);" \2 V7 N+ Z8 G* k
- g.setFont(font0);* c5 L' C9 e! I4 P1 u
- let str = "晴纱是男娘";
1 d* Z; A+ M" m- h9 y ` - let ww = 400;* Y W$ ]. L8 y1 x: i% d
- let w = getW(str, font0);
/ X D! f$ W0 ? t) h# W# p - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();6 o; i7 a* H# m1 h+ l- |8 T
- mat.translate(0, 0.5, 0);
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, L& F2 v/ }6 |- function create(ctx, state, entity) {, i' F; v. {! @8 e; C
- let info = {& c9 l1 d5 J' }+ _
- ctx: ctx,
* ~% ~# d: X( ~ - isTrain: false,8 A, Y* S+ `1 k( p4 e9 H
- matrices: [mat],5 v8 |5 ~9 J/ F7 I- x$ o# b
- texture: [400, 400],
- a! F5 T/ n3 {: I/ Z l+ e0 l - model: {
! B! G% I: h8 Z' `9 H - renderType: "light",- _0 r# D K1 S! `3 o" z
- size: [1, 1],, T1 w, ~/ W3 L0 Q6 n) u
- uvSize: [1, 1]
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- }# o. h1 @/ O2 e6 e7 Z5 Z5 ?1 i$ D* }3 A
- let f = new Face(info);1 Z. _% f& j/ S
- state.f = f;. b; m& H* Z1 Z* t+ M/ n6 x
- + z/ N2 A+ A1 w( Y
- let t = f.texture;
- p( M' ?: N' O+ I. [1 T( R - let g = t.graphics;
" A% B9 O @' I T8 z - state.running = true;
. v7 m; u5 F2 ]7 o6 J! @ - let fps = 24;9 N% |8 J# z: o
- da(g);//绘制底图/ T+ `7 x7 v% _8 ?/ ?+ f, ~
- t.upload();
2 }' k( Y& i6 |% ^! A: x* v- K2 ` - let k = 0;6 `) `" Q# U* n- ]9 |3 Y
- let ti = Date.now();$ n, c; j- D/ K4 G2 c
- let rt = 0;& N$ R& x0 ?# k n! r4 w$ U' Z
- smooth = (k, v) => {// 平滑变化; s/ J; K/ F! [4 t) R! J
- if (v > k) return k;, P3 i* b$ b* [9 E) {5 r% p% q
- if (k < 0) return 0;
% _- Y- q8 k& p9 p1 T - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;7 Q, }0 G. t# h( B# r1 ]" u
- }
3 a' J6 f! `! w- H, R. V! ?% T - run = () => {// 新线程
2 H) L5 c( Z0 a - let id = Thread.currentThread().getId();: N2 `, V* N% U3 M
- print("Thread start:" + id);! M, p4 b8 f( E" o4 J; u [
- while (state.running) {
3 v8 Y% N% h4 l2 J1 d" ~ - try {
! B- C* G5 w2 {# `1 W% Z3 H - k += (Date.now() - ti) / 1000 * 0.2;5 P2 u8 n, d- ~- O8 ~9 Y
- ti = Date.now();
$ z" |! F3 \, w2 n6 f - if (k > 1.5) {
* q+ y$ r( u) r$ d - k = 0;2 e2 T. i) S: U7 J. _% ?$ o
- }4 ?* @" t% g3 Y# t: o8 h
- setComp(g, 1);
* _/ F' P% e$ r) ^9 U1 [ - da(g);
' l2 ]3 D4 i3 N% I, t4 \1 y& y - let kk = smooth(1, k);//平滑切换透明度; d/ y- |8 n% I1 \ s
- setComp(g, kk);
# F; A0 M; _1 R7 S - db(g);
2 B! C. o( `' z* M. f - t.upload();8 f5 W+ c1 W4 }4 H7 E" @
- ctx.setDebugInfo("rt" ,Date.now() - ti);" ]2 K# `* A; _2 g g) }4 m7 {
- ctx.setDebugInfo("k", k);
4 m& m- F3 I, ^4 f* a! z& Q - ctx.setDebugInfo("sm", kk);
: r4 Z* u0 L0 Z( G - rt = Date.now() - ti;4 Q) U( j/ E w2 P
- Thread.sleep(ck(rt - 1000 / fps));; L9 d# j; f& Y* v
- ctx.setDebugInfo("error", 0)
9 \' Z/ W( L, i' F( Q6 w - } catch (e) {
+ `: X3 F: N' V' [7 C [ - ctx.setDebugInfo("error", e);
. B1 u' b/ V: o9 ?8 d/ O" V% v! t2 G - }
5 l7 ?6 M2 Q; t" Q; J - }
5 S; l, l! X6 N, R5 p - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");. N! a4 V7 e- f' K9 r
- th.start();4 B# ~$ }2 w) l3 n+ _
- }; T6 X8 b9 }2 q5 D2 t, M$ i
$ @6 M$ I+ [; w. C& Z- function render(ctx, state, entity) {
/ V; @8 _5 ?2 `) y/ f, K4 b - state.f.tick();% V U1 {' m' i/ V7 {
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- : S0 m/ B% v! S3 V4 q- K
- function dispose(ctx, state, entity) {: r C" Y& M. h" s0 l
- print("Dispose");5 e. i2 ^" J% C$ ~* b
- state.running = false;' p# O6 c" ]& m
- state.f.close();
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0 s' X- t6 Z7 @% k% b7 r2 G- function setComp(g, value) {+ E2 s1 o9 M/ S) A+ t$ B
- g.setComposite(AlphaComposite.SrcOver.derive(value));9 v& d# z+ G8 K$ P9 g$ Y. G7 e8 A, V
- }
复制代码 . @2 u2 J" U* o. x, O
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。$ G& \/ `+ L! f6 s# o$ A
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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)
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