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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。3 W8 w) T2 p+ a8 ~# q4 P8 Y. \
- importPackage (java.lang);. L# u1 I. X) A* L J# {- h
- importPackage (java.awt);- ^- ^& q; j. C4 T4 O4 q
- 2 n6 x# [' @( s3 [' j/ ?- R
- include(Resources.id("mtrsteamloco:library/code/face.js"));$ C/ l5 ?. x4 u) F
/ z Y8 a9 }- _3 U; [- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
2 ^+ f! x% ]" c q* b9 z
& W# R7 Z& f/ D, b8 X" b- H+ s+ x- function getW(str, font) {1 p. y9 d C3 e2 k& z/ ^* y
- let frc = Resources.getFontRenderContext();+ g% h: m3 \% W# h; [
- bounds = font.getStringBounds(str, frc);. o5 p3 y* L5 i
- return Math.ceil(bounds.getWidth());
# o! F% p/ s8 I( T! Y( p" X - }
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- da = (g) => {//底图绘制
% ~* C. @8 n- Z* ^0 K4 Y! f - g.setColor(Color.BLACK);5 _8 m @. M0 D0 j8 `" D, C; ?
- g.fillRect(0, 0, 400, 400);
- H6 ^0 c( u) S H' s2 d; ~+ g0 C - }
9 B3 G, l6 K8 f5 A - 0 s8 K' P( }5 L( R6 r: \" |. Y( W" \
- db = (g) => {//上层绘制
( F b' X8 D, N0 m6 z% ] - g.setColor(Color.WHITE);6 X' z, j, c% V C; c& {& ^+ o* `
- g.fillRect(0, 0, 400, 400);
' } B/ X, o! c - g.setColor(Color.RED);
' p6 H5 t0 h2 a; |: s4 I - g.setFont(font0);) `7 s. x/ U8 P! a: h
- let str = "晴纱是男娘";- y/ o& g; i9 A
- let ww = 400;& a4 j5 r- m' F3 h6 o. i% B. K$ R4 H6 C
- let w = getW(str, font0);! S) B* o* O. F5 ^+ R k
- g.drawString(str, ww / 2 - w / 2, 200);
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- 4 j. a+ j, F3 X5 X* x
- const mat = new Matrices();
6 u' s: w9 C$ H+ ] g3 ^9 L - mat.translate(0, 0.5, 0);
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: W& X, X+ a- D, R$ Y. [" e- function create(ctx, state, entity) {6 L3 E# x7 k! s
- let info = {
2 _# I. S' @' H - ctx: ctx,
( g [% c3 [* O - isTrain: false,# N2 N; Z# X. B
- matrices: [mat],/ ]% T$ ^, g: B# {7 b) {" T- J
- texture: [400, 400],
8 U. W4 }/ P+ t: g - model: {
8 H0 K% }4 J/ X6 w9 }5 F# R; k" h - renderType: "light",0 x" `% D2 n7 m, T, o P! j
- size: [1, 1],
& m/ F/ ^: F3 Y- N - uvSize: [1, 1]
9 }4 ^9 P u" A1 E - }
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- let f = new Face(info);$ M' `9 A0 O, ?; y5 y% d
- state.f = f;% N9 H& g; U; }
6 R$ x5 o& W) f* S5 g, r7 z3 V- let t = f.texture;( t. f X; J+ \# S4 ^; L% t" @* Q
- let g = t.graphics;
, J; n- x7 L0 r0 }, c2 g - state.running = true;7 l! d' z( n( S1 X* R; L( z" e0 t
- let fps = 24;) s& @* Y# [, S1 L0 g. e. s
- da(g);//绘制底图6 i6 d) \$ ^6 j0 w
- t.upload();4 z7 x O4 w5 Q/ k; j+ N
- let k = 0;% t! q* y3 p: X) c" v" Q
- let ti = Date.now();* j8 e; U. G" z9 y {: h" }
- let rt = 0;
+ W; r% @. {! E6 t0 ~# k9 K) s8 R - smooth = (k, v) => {// 平滑变化
F/ F" k% _* T& y5 w2 k$ j! d - if (v > k) return k;
' ` X- @2 d$ d# G& W. P - if (k < 0) return 0;, g; S; X9 }6 R( }
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
z- Z; m/ k2 r# U. b5 Q3 w - }
2 f% Q4 ?& y* y( Q3 [3 K - run = () => {// 新线程
/ H$ H& M3 r3 ~9 ]/ j% P - let id = Thread.currentThread().getId();# v5 X& Y7 T4 t- X" D
- print("Thread start:" + id);
3 _0 G. G; [: L/ ]6 w - while (state.running) {6 _$ I1 [+ t. B& Z% l* e+ ^4 ~
- try {
/ f3 d/ j2 U% ?$ ? - k += (Date.now() - ti) / 1000 * 0.2;
; I5 P4 G: K) q( @ - ti = Date.now();
: |' E. C" f* ?) F) P/ K - if (k > 1.5) {
' E" j5 _2 M$ j4 ` - k = 0;8 s$ a$ X+ p- @4 ], t
- }
7 A. s* i' }. C W" [ - setComp(g, 1);
C- P U3 q0 P* }" {# c! W! ~, S/ x - da(g);$ v% I+ a9 y( h, {9 I
- let kk = smooth(1, k);//平滑切换透明度
{& q8 ~/ \. b9 I - setComp(g, kk);4 e/ Z( Y6 n, N& y1 w) v
- db(g);
4 f% g6 G& v# T9 G8 Z - t.upload();* h) z' D9 Q; G5 j
- ctx.setDebugInfo("rt" ,Date.now() - ti);
! {/ S7 l) |5 ^5 w - ctx.setDebugInfo("k", k);& v' {$ J Q3 e
- ctx.setDebugInfo("sm", kk);$ F+ v* l c1 | x/ s B
- rt = Date.now() - ti;
( d' L5 y9 k/ ^' o) h6 F9 U: ~/ ? - Thread.sleep(ck(rt - 1000 / fps));
k8 o9 n* N: R x" v9 q - ctx.setDebugInfo("error", 0)3 }# q$ i ?0 h: v; b$ y( }. h
- } catch (e) {/ c/ ]4 V7 g) Q( N; U" P9 R
- ctx.setDebugInfo("error", e);/ M* e- o$ c- j( g4 e2 m
- }
7 V- o) s; Q; I! U - }0 x8 [+ ?: `0 o1 N* O1 I N
- print("Thread end:" + id);6 d6 r7 i1 T5 ]
- }
( y; }( ~$ i: i - let th = new Thread(run, "qiehuan");! y- j' U$ q0 c2 ^. k$ r4 D
- th.start();6 y; a" Y# V) e) f- b
- }
$ [/ Z1 [/ L; S3 B' q
& h X5 I( N; e& Q, V- function render(ctx, state, entity) {
# X7 w! s ?5 v: B4 j - state.f.tick();
/ }( J- `) r/ G. _$ T( N# S8 O$ n - }
3 r [: u4 m% N$ U) O9 Q; [* s; ]
# _0 \" v* g$ P- function dispose(ctx, state, entity) {
/ T: U; I: w) d5 |5 j. a, B3 g7 ~ - print("Dispose");
1 J5 Y. N* k% a4 }3 I* @! [( r& p - state.running = false;/ }- r% w+ Z+ ~ @* U6 x
- state.f.close();- W( U/ z) Y" ^7 T. @+ \
- }9 Q0 O+ j5 Z7 U, q3 M2 H; O
- 2 X7 L5 ^) w" A: g/ u8 B6 i
- function setComp(g, value) {& Y4 o5 E* ^& v, R
- g.setComposite(AlphaComposite.SrcOver.derive(value));) C7 I" y9 M3 h/ l5 W
- }
复制代码
& J: F; G5 p" o5 U* @# G+ e0 J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。( d; d7 S* x a, s# q4 \
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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), j$ j5 y* X! }; k8 S A
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