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# B( ^! t3 E, Z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。 f2 g# x+ s, @6 @
- importPackage (java.lang);2 F6 ~% n3 I' X/ S' Z4 i+ L* D$ V" i
- importPackage (java.awt);6 R+ d- E! V% e# p4 Y5 [
9 K K. B; v9 |: O( E5 o: M- include(Resources.id("mtrsteamloco:library/code/face.js"));# z- ]$ k; D2 a& X ~' n
1 T; j% m5 q- a4 F& l- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" E0 J( b% L# N# `8 ^
- & j- p: K8 l: Q6 w+ J
- function getW(str, font) {' Z' n2 W. m3 [$ G1 V0 i& c
- let frc = Resources.getFontRenderContext();* O Y7 H- ]) m0 {
- bounds = font.getStringBounds(str, frc);1 B# _7 b8 v/ G# H: W# T2 s
- return Math.ceil(bounds.getWidth());2 Y9 q; ?2 w4 B# S8 ~2 X
- }0 H7 S& l+ m$ I# B& r: v0 T
/ `1 W% ?* q7 A& [5 ~( }2 \- da = (g) => {//底图绘制
5 {* v6 M7 a. b3 q3 h4 b - g.setColor(Color.BLACK);
0 V* e: e9 O) v$ T& h- z6 S - g.fillRect(0, 0, 400, 400);% V5 _( D: p) b$ v1 {1 M
- }
. I$ K: S" `6 _4 W - ' ~! Z8 k P9 u# s& p j
- db = (g) => {//上层绘制* q1 q5 V; e9 K: e7 M
- g.setColor(Color.WHITE);
: N1 Q ?& L4 F- X# h' A - g.fillRect(0, 0, 400, 400);
- V% I# D/ [# y0 K) ? - g.setColor(Color.RED);
4 v: D, K0 f, F* t3 F2 K - g.setFont(font0);9 v ^$ ~9 D$ y6 z0 I Z
- let str = "晴纱是男娘";
- n* j# R7 B( _ - let ww = 400;& Z7 P( Y: O/ ?( d' c# g# g/ q
- let w = getW(str, font0);: K% L. ~+ ?8 D$ E! T) } n2 O9 V: V
- g.drawString(str, ww / 2 - w / 2, 200);0 B! e* h/ X+ E$ s& ^2 n j
- }
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4 }# O1 ^; D! `* I* e* o, h- const mat = new Matrices();
0 ^8 i; D" m* y5 K# g! D - mat.translate(0, 0.5, 0);3 R' G7 q- x4 s$ e7 ^6 V
+ q9 u1 t/ c5 s6 e% W* \- function create(ctx, state, entity) {
- B3 Q3 {! _. T0 X0 R! V - let info = {
. f+ V; q" p. y- a" }7 s' |- b, m - ctx: ctx,
' E9 c* _, w, q$ v+ P1 a4 @& o - isTrain: false,
; p: p- V# N' f q( Z( r% I% ]% K - matrices: [mat],$ J x3 Y a! F! o$ S* u9 q, H3 G
- texture: [400, 400],
! R. M4 z0 p& d- u' H7 k - model: {8 x0 v( H$ A2 a, A
- renderType: "light",
8 O8 @# y u+ T0 K2 i - size: [1, 1],
/ |1 c( Q) J8 w! y3 L+ ` - uvSize: [1, 1]- h9 C. Q N! W7 q$ o4 _
- }4 e- m$ {# b0 L4 a( g% X8 C
- }- M( B- c5 E0 Q! d3 J, \
- let f = new Face(info);8 `$ k2 E# z. P3 h9 ]% }- q
- state.f = f;
* }7 Z: V: W: b8 M+ b& |
+ O( k% ^7 J' e+ `8 q- let t = f.texture;
: O- y# A# C/ e3 H. ]9 {2 l - let g = t.graphics;
, [1 [1 K- f$ o x | - state.running = true;
8 R7 |* @0 Q( R6 w - let fps = 24;
/ Z6 J i: v. U1 H) b5 c# w - da(g);//绘制底图
& Q+ o2 j. ?1 }: \6 a+ T) y - t.upload();
* B2 v0 d' e1 @* b1 U. y+ r - let k = 0;4 p4 r1 q, z) p/ T
- let ti = Date.now();
2 g# _3 |" K4 [ }6 q - let rt = 0;$ L7 ?; |) A* I- R5 W0 ~
- smooth = (k, v) => {// 平滑变化
( a' M' j" C' v% |/ M3 @ - if (v > k) return k;; `1 O, i# @) a/ T8 g
- if (k < 0) return 0; t0 R$ [/ @' {! y) u
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
+ I( t- } M2 I" N& E* p - }* p* Z4 K& \$ _ h" K/ c
- run = () => {// 新线程 g# q0 u1 c2 V$ v
- let id = Thread.currentThread().getId();# o. U) T7 M9 p: Q
- print("Thread start:" + id);
% K4 I8 Q% r- A - while (state.running) {( c2 a6 H5 x k+ N. J
- try {4 I& u' R; E$ r
- k += (Date.now() - ti) / 1000 * 0.2;
& g( ?, ~0 o, {, R6 M9 n. H. [ - ti = Date.now();
9 s& u1 X8 W! R - if (k > 1.5) {
) p8 H0 J) I3 ~) A/ g) G/ k - k = 0;
4 P( g- i; ?* H! H2 O7 F$ G% ^ - }2 j& L% _4 h6 x% u
- setComp(g, 1);; M: y6 z1 j: q- W$ l
- da(g);, `. C4 l' E$ a! n' d) h
- let kk = smooth(1, k);//平滑切换透明度
. y# b9 Z7 Q; }! l& Z; y/ z - setComp(g, kk);+ K8 Z7 H7 }# w3 b* t
- db(g);8 y( o$ j& T2 _) _
- t.upload();! T4 U) U- J: s) P4 H- i
- ctx.setDebugInfo("rt" ,Date.now() - ti);
. d. f( m! X$ q7 m9 d - ctx.setDebugInfo("k", k);( _: Z" |' u1 G- {
- ctx.setDebugInfo("sm", kk);! H( R3 v {5 f5 w+ X
- rt = Date.now() - ti;
! J2 a7 j# N' j( a+ Q - Thread.sleep(ck(rt - 1000 / fps));
3 J' ^! J& B$ @! k6 u7 [ - ctx.setDebugInfo("error", 0)
. h; {$ @& ?) p, B( | - } catch (e) {
2 r6 u, i% G6 p4 t - ctx.setDebugInfo("error", e);3 o. [/ f4 ~* @. C& Q
- }
' \7 y, ]* ?4 d - }
% g3 _0 C0 Q' p7 C0 w - print("Thread end:" + id);) \3 y9 ], u* k
- }7 A. X( E. }1 M( R: D3 n
- let th = new Thread(run, "qiehuan");5 c+ q: ]2 P# a/ Y; O
- th.start();) P: U5 ~* X P8 Y8 I
- }
1 w4 O0 V/ \6 F) {; r
& P3 c2 o! E. G# B+ N& o5 g( M' `; w- function render(ctx, state, entity) {0 X9 }: \6 W4 G9 N4 g( ?
- state.f.tick();
1 d9 S6 t% Z; U - }
# R$ I% j1 s# K
, d! {% \$ d0 h, q2 g# w3 g- function dispose(ctx, state, entity) {
+ P( \5 l2 R' n: D - print("Dispose");; t5 i5 v3 |" \
- state.running = false;; r; l) E- j4 [
- state.f.close();; e Q8 d6 x% J% L% {# q0 \
- }
: G' D* z/ ~" f0 g - 0 d/ C9 v- ^5 j; A
- function setComp(g, value) {
) S& O. |6 v) ?- r - g.setComposite(AlphaComposite.SrcOver.derive(value));# A C% n/ K2 @; n* @
- }
复制代码 8 C' |$ _( Z, I
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。' n/ d6 `4 [6 c6 A U
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/ f4 ~; f# Y( X6 n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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