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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。* I1 v# Q, O" _( ^$ |
- importPackage (java.lang);
8 H" y5 b1 v( C$ t - importPackage (java.awt);( j$ }' ]$ T! o& C% g
- ! x8 \8 X4 J. ^
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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# P5 J7 j& Z$ [+ y4 L, c- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);2 M1 c+ O1 s- ^& p0 I
- Q# \' l5 ?7 u& J8 w- function getW(str, font) {# _1 X) w# B1 g- x0 b
- let frc = Resources.getFontRenderContext();' I' h+ O$ d$ B. o! N6 T
- bounds = font.getStringBounds(str, frc);: b* v C; e" j C3 r
- return Math.ceil(bounds.getWidth());
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2 O* k6 i( N1 E9 F7 r/ T; ~- da = (g) => {//底图绘制
$ e$ N; \5 m( ?- ]; w/ f9 Y - g.setColor(Color.BLACK);
0 X" n+ |7 Q8 R - g.fillRect(0, 0, 400, 400);
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- 3 X' w$ I& y: d/ t. Q% N
- db = (g) => {//上层绘制$ R& t A0 g. Z
- g.setColor(Color.WHITE);, P" V+ n% t9 B; ?8 n$ C5 L
- g.fillRect(0, 0, 400, 400);
5 F0 K9 J6 n+ S) t6 s& E2 B - g.setColor(Color.RED);) g4 V( }1 Z9 s6 h
- g.setFont(font0);
1 q) ~/ b) Y1 J5 Q+ k/ C0 a; z - let str = "晴纱是男娘";7 |+ z3 S' ]6 c1 n( `
- let ww = 400;
7 @3 ]5 ^0 I- Z+ o. l2 n0 H - let w = getW(str, font0);
; f- d2 X% H4 W" a6 w' s) q2 ] - g.drawString(str, ww / 2 - w / 2, 200);
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- 0 y5 j- r0 e3 O) N! s& _' a
- const mat = new Matrices();7 w2 j* i% {# n" _( Y; r3 f
- mat.translate(0, 0.5, 0);+ V7 \! c2 g% f) n9 r9 s0 F6 f( P
- $ a; N& f3 E8 }0 ]7 @& o/ d
- function create(ctx, state, entity) {6 b$ B. s1 u6 d4 d4 Y+ z# j1 ^- C
- let info = {
( v7 D: y5 [9 K, X; n) F - ctx: ctx,
$ h) Z4 u3 [ z# [; n( I2 G - isTrain: false,
8 F" v' X) P. l& r. p# y - matrices: [mat],
6 C% K( B$ b& P# L, B. P% u - texture: [400, 400],: n7 I& y8 B3 D/ D% t( @
- model: {
- O( z# P! e* j8 E' e# F0 ? - renderType: "light",+ j X4 f( ]3 k! L# P- I
- size: [1, 1], b' S" C4 O# A5 r6 P
- uvSize: [1, 1]
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- }" _$ j! |( s7 T4 X; W% V) G- r* H
- let f = new Face(info);
: Y. z( R1 R" o: h - state.f = f;
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- let t = f.texture;" q: a4 ^; o' {( c Y
- let g = t.graphics;6 ?* }# A8 C# d. c+ ^( J6 O" a
- state.running = true;( F% e' n/ _. @" T0 J2 `
- let fps = 24;
* N3 C C0 H. \8 a0 Z$ ` - da(g);//绘制底图5 V8 Z! d0 l' h3 ]7 [
- t.upload();2 x; R6 ^ z+ o# e
- let k = 0;5 f! Y' P# ~+ F# X9 Z
- let ti = Date.now();% R# Y" K( }+ ~7 B
- let rt = 0;: l, n' p" i9 ~3 H+ ~5 ^! V
- smooth = (k, v) => {// 平滑变化 G) }% \/ F0 I8 g# t# O I
- if (v > k) return k;
6 A7 U! h* f1 X/ Z - if (k < 0) return 0;
8 ^( ~7 r8 Y0 ?1 Q - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
4 E! ~- `* O. r9 E$ ~8 R q5 T' v* k - }
J( c! a' r. u m7 ]9 A - run = () => {// 新线程, I2 u+ I6 x, } h, Q
- let id = Thread.currentThread().getId();
" A2 ? g; G& o" { - print("Thread start:" + id);
' @$ }: s4 F2 z3 D: P# U - while (state.running) {9 N! E2 V0 L; a, ~# ?0 d1 K, h
- try {
9 p! L! V }/ O1 a5 Q3 o, n - k += (Date.now() - ti) / 1000 * 0.2;1 ^# Q5 H2 H* L2 v4 _$ E! p
- ti = Date.now();7 s7 M% X5 f- Q+ B) L& I
- if (k > 1.5) {
$ T6 ^& i2 [9 m9 p - k = 0;
" n8 |* `: {5 k7 y+ w$ j. T - }
" k/ e; @$ S9 o - setComp(g, 1);! K2 d; d0 D3 ] w
- da(g);
& p+ H0 ^0 [- h3 o5 v+ T. I, N7 l- D - let kk = smooth(1, k);//平滑切换透明度
; Y2 D6 k# Z! A% ~/ h" f Q! l+ ^/ y - setComp(g, kk);
2 S* q2 v) T' L* f - db(g);
! L( i0 r& e( W' Y7 f, y0 U, T1 [ - t.upload();( n7 b3 ^* ^' |9 _
- ctx.setDebugInfo("rt" ,Date.now() - ti);3 ^$ C, V: Q& f- n
- ctx.setDebugInfo("k", k);& F% N Q5 f: C" h4 h# X( }1 u
- ctx.setDebugInfo("sm", kk);0 }# i8 d u- r2 V+ G8 i. x
- rt = Date.now() - ti;
% E6 p# ]/ T; B. w. a( j3 p - Thread.sleep(ck(rt - 1000 / fps));
' _8 H) U" m2 E: H - ctx.setDebugInfo("error", 0)0 I/ Z; E4 ?0 n& Z/ u0 a8 K, B
- } catch (e) {) n$ S8 l a. h
- ctx.setDebugInfo("error", e);
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- }4 s$ P: l8 ^( f W6 p
- print("Thread end:" + id);
+ U; P9 I( N" G9 J( U6 O2 O - }
3 v$ Q8 n. W, t: y2 ~" O - let th = new Thread(run, "qiehuan");
" d* s2 n: ]$ e+ e- L8 A0 o* H - th.start();; C- S @$ D3 T
- }
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- function render(ctx, state, entity) {
) u6 b0 W9 @- y- W- k8 Z - state.f.tick();
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- % M; f+ W+ F+ y5 d
- function dispose(ctx, state, entity) {8 h% ^5 E+ ~% {6 N8 R) K
- print("Dispose");& x. [2 ^" O- D) W$ y; g
- state.running = false;
1 P& u( a* V/ G6 \ j+ @) } - state.f.close();
$ j3 K' y. R8 U+ ~& k# _+ Q) T - }
* O+ V; X( c6 V$ @; a: b( B; ` - % G5 I$ v% t. Y4 T$ I: c# l" j: ^
- function setComp(g, value) {
U! c" l0 r, Y: v/ _- E/ C( T' G. X: e. s - g.setComposite(AlphaComposite.SrcOver.derive(value));- T% j) b) |: n$ w
- }
复制代码 3 A& n7 M7 [# k- X0 A
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。8 S+ [* o- I* M9 b* b0 T$ h; m0 i
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' h; x, D% W1 X1 r& B, A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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