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+ j5 Y$ ~1 H/ _4 s- G4 L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。
+ d9 ?6 g& l" h: y+ N' a* r% }- importPackage (java.lang);( n/ s2 V/ u g$ v
- importPackage (java.awt);
/ ?' j9 Q2 B% r' n' b
4 T8 |( t# B( x/ ?4 z) q- include(Resources.id("mtrsteamloco:library/code/face.js"));0 E# g* ?3 w) `/ E$ x; d
- : Z; p; Q- C5 |/ t( K
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);% f7 v/ _7 [: C# ?; D
- : c3 L: H! l8 H4 a8 C
- function getW(str, font) {, Q3 B' O2 D$ e) c* s+ [4 D1 G
- let frc = Resources.getFontRenderContext();* ]. ?/ u- v/ O& P$ R( t$ v6 Y
- bounds = font.getStringBounds(str, frc);
4 q! W! i4 j1 W - return Math.ceil(bounds.getWidth());% i" j3 @8 o2 V' m# v- B2 \
- }: @4 R* @: D5 G! o4 z, z
" [8 n+ Z' J3 \& o, G- da = (g) => {//底图绘制
! B5 V' Y4 K/ i$ s* T7 Z2 Z6 _6 k# v - g.setColor(Color.BLACK);
3 |. Q6 s/ o b0 \" f* r6 W( N+ l7 @ - g.fillRect(0, 0, 400, 400);/ F' H. ^* G) e4 t
- }
) I" n' r/ y2 A5 o% T
2 A( P( |( V! k( p/ R9 i3 p8 n- db = (g) => {//上层绘制6 Y \: o' v1 L5 N
- g.setColor(Color.WHITE);- C9 |+ W9 h5 r m
- g.fillRect(0, 0, 400, 400);
7 ~! S* h3 F8 m - g.setColor(Color.RED);
- t( B8 ^8 t1 L- L' S" a - g.setFont(font0);) r) C/ _& V: M( C7 O+ C$ ^
- let str = "晴纱是男娘";
& b6 F. q8 X4 N& Z: Y C - let ww = 400;
7 v+ V0 G; @0 u: l* r+ K; M* G. T! Q - let w = getW(str, font0);
' b5 g% i4 V+ O% a& ]- f0 z - g.drawString(str, ww / 2 - w / 2, 200);, M" t% A V( B9 p$ P$ |
- }) ~! |7 V: J! S8 l" } L V
( Z, j0 f0 S2 l# N% k- const mat = new Matrices();
) s" s ~; p* X4 u2 [& K* o9 ?1 B* U3 V - mat.translate(0, 0.5, 0);
( v+ ~- Q3 Z* }. {' X7 \( @; E0 P - + A5 y6 l Q- C- c2 q
- function create(ctx, state, entity) {' u f4 E7 ]0 s9 A) Y: m J1 `
- let info = {, A8 ^3 {2 @( X5 r- H3 E/ Q: t
- ctx: ctx,: |# s; e- P/ d9 b) J
- isTrain: false,
: U+ O, V2 j, A' l5 r7 M# b - matrices: [mat],
7 F+ U- o+ ?* {- r1 x - texture: [400, 400],
8 v" g" M2 l0 ]" N0 \( f! F - model: {
( Q& K4 {/ o' X4 w( {8 L- U! o3 U - renderType: "light",
6 n q7 B1 e$ W; h - size: [1, 1],
+ o" C) N/ R- i! r6 m - uvSize: [1, 1]
; f1 P4 Z1 a# |& o) A - }
h- {# Y8 T* M& `! P$ l - }
0 U2 V$ r8 G4 h4 o - let f = new Face(info);2 `* w6 D: h5 k! M# s0 {. v9 r8 i4 x
- state.f = f;
% m) Q& ]1 W _7 L7 Y+ E d
6 Q2 F2 o% X7 E$ @( H& j/ Q- let t = f.texture;6 `) y1 z* T+ T$ `7 W, ]4 P
- let g = t.graphics;1 i+ ~/ ]7 t2 @8 j1 m) u) }
- state.running = true;
* ]4 C; v# e, r4 ?/ s - let fps = 24;
5 y* |# g6 l- F8 l3 C. a7 a - da(g);//绘制底图- d. h! B) K( p r. _+ o0 ~, j1 P9 S
- t.upload();
3 ~6 R5 U' B9 X; j1 e- J2 v" c - let k = 0;5 Q' F J6 O7 r& N$ k. d) q
- let ti = Date.now();
& E; J) v9 F& D5 q6 ] - let rt = 0;
; F0 q5 N9 g6 L4 x7 R - smooth = (k, v) => {// 平滑变化
6 Q3 @% n- `% j - if (v > k) return k;
+ P% }; Z. u; ? r6 t - if (k < 0) return 0;; i" o& j5 \" |# L. y" x, A* E
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) U: M( s6 f( ^" i6 F/ V
- }
0 q2 h* r, {. U8 C - run = () => {// 新线程1 ~3 M+ k; p: `
- let id = Thread.currentThread().getId();
5 q7 U& q! |7 s0 |' d8 l, D - print("Thread start:" + id);) J& P+ a- M [4 M$ c7 ~5 B, O# l+ A
- while (state.running) {9 W0 {, `# |! U4 X$ c# k
- try {, K( C u( o0 C0 }
- k += (Date.now() - ti) / 1000 * 0.2;% F7 h7 P% u8 t4 q
- ti = Date.now();5 }( \# `9 E+ q8 }/ e, e
- if (k > 1.5) {: ]5 P6 u' q* y4 c9 l: @6 B$ Y
- k = 0;
0 S) L i+ u+ A$ K - }% o5 |0 U- O7 e$ W9 h! C& k
- setComp(g, 1);- G U, m& v7 S( h
- da(g);) ~8 D$ Y. i& r: D: h5 y
- let kk = smooth(1, k);//平滑切换透明度$ }; c& C# p! @# v/ ~
- setComp(g, kk);/ e8 Y2 x7 Q& ^& I9 P, w
- db(g);9 L; v& r3 q: x" H0 v/ B
- t.upload();1 x4 H% M) C# _) }) j
- ctx.setDebugInfo("rt" ,Date.now() - ti);
/ Z7 @ W8 k7 ]4 T: Y1 A. B - ctx.setDebugInfo("k", k);9 k( D3 }7 ]& V, i; v0 S" H$ ~ i
- ctx.setDebugInfo("sm", kk);/ R e) |: j+ `! a$ m M
- rt = Date.now() - ti;
3 ?3 ?1 T5 E6 W - Thread.sleep(ck(rt - 1000 / fps));: L. |; w! ~7 K" [
- ctx.setDebugInfo("error", 0)0 P5 i' e( V- o, _
- } catch (e) {6 X9 M# n5 h- @' S8 d5 l+ j
- ctx.setDebugInfo("error", e);
3 N8 V$ w5 N3 r0 U |9 k - }
1 N' @ L8 X( Z/ e - }% K! r3 K" w! ?( E P" v+ G
- print("Thread end:" + id);: ^/ t7 p% `; S( Q$ D
- }
1 z+ E, E3 Z+ Q/ @# @" v - let th = new Thread(run, "qiehuan");
) B$ ?' L$ ^5 ~9 B7 g2 U - th.start();
; G+ l( L" x6 S7 h - }
% s0 e, c$ z8 h- X$ r& O$ G
7 Z( `0 `& `! ]" W- function render(ctx, state, entity) {
, k( g- s: f/ Z - state.f.tick();" O2 t: x3 B. ~* M. M* T$ q) R! f* ?
- }
! I1 o8 ~ W D' e% c4 c) v* H
- p+ p2 z; ]* c$ I- function dispose(ctx, state, entity) {
, D+ t0 T0 M$ _ - print("Dispose");
8 d, z K. ^+ R7 U7 h - state.running = false;" ~% J+ B% `" R* I1 W5 G7 k
- state.f.close();
/ w0 k* v5 @. ]& G - }1 ]* Z' `2 B$ K) m
- " G; }( {- M( |! g
- function setComp(g, value) {
4 f( }* t' ]+ o3 H+ t( V - g.setComposite(AlphaComposite.SrcOver.derive(value));8 ]" t0 B' `/ K: H9 h' d
- }
复制代码 8 L/ ~( s. x5 F- L5 q6 ^) p5 s
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。. V* T+ _' m% E
& f5 y6 N; _8 r d: ^. U
7 t$ F, N$ Z S2 T7 U顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下): P P+ B6 H! f, a
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