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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。9 q- g' [0 A9 W
- importPackage (java.lang);2 f5 a/ }9 g. j% f: o" I
- importPackage (java.awt);
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$ a* |$ K9 d$ K# x9 x' Z- include(Resources.id("mtrsteamloco:library/code/face.js"));2 l# u! Q6 @$ h" K" ]& [9 V
2 s* m( ]( f3 U6 f+ d- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);) q8 J% g e6 s9 V. t9 k
, A5 U2 P4 G y5 `- function getW(str, font) {
6 |2 _7 X$ \* u ?8 j9 E6 d - let frc = Resources.getFontRenderContext();0 H1 i9 C# H$ c
- bounds = font.getStringBounds(str, frc);+ A9 Z# j0 P) L6 s( W9 M5 M1 j) e
- return Math.ceil(bounds.getWidth());/ |* z! e! l4 K* }2 D# g( R
- }
% y: U T# R, F# e" m - % x) ~; r( c- _! j" r
- da = (g) => {//底图绘制( s$ j0 J5 I7 u# y* z
- g.setColor(Color.BLACK);$ m5 i) H$ U0 S
- g.fillRect(0, 0, 400, 400);1 m4 O/ v2 z( X
- }
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- db = (g) => {//上层绘制
6 @4 M' C; c2 _! i! r" n) O2 z - g.setColor(Color.WHITE);
; |7 p3 ~1 [: U, n - g.fillRect(0, 0, 400, 400);9 M$ [; T) J7 R
- g.setColor(Color.RED);
/ A+ I; B* h1 ? - g.setFont(font0);/ }* G& c& {; f6 q$ G$ l
- let str = "晴纱是男娘";% f( b! N; I, p2 k
- let ww = 400;
+ W3 r. K4 {1 d" H V$ p1 W - let w = getW(str, font0);; Z. Q6 e) e: A
- g.drawString(str, ww / 2 - w / 2, 200); B* ]7 R" Q5 i: U! f5 A7 F
- }
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4 P4 ^" n( V3 H: O" o" q- const mat = new Matrices();
( ~0 f. t& ]4 b" N4 b& @! j4 p - mat.translate(0, 0.5, 0);% f* Y4 b! K2 U" s0 Q% ~
; D$ a" k G. N& F4 ~' Q- function create(ctx, state, entity) {3 n( r! [ j# U$ d
- let info = {
7 ~' a0 p! ?2 q2 O+ \9 V - ctx: ctx,: @2 N$ E# [1 i' J3 p
- isTrain: false,/ ?' q" n" n9 G4 w/ K% @
- matrices: [mat],% `) m/ p" `& d
- texture: [400, 400],# q$ V5 [7 C$ M5 }- O
- model: {
" @! k: ~. ], [4 }( U - renderType: "light", D0 b+ Z) G/ b- I. P8 F/ l
- size: [1, 1],. S# l6 D* |! X. P7 W1 ^
- uvSize: [1, 1]
8 @7 |0 N" h2 W& P+ j! o. Q; e { - }
. V& L1 ? @2 I; H7 M( B! m - }
6 K( T; J9 }* A8 l, p/ z. R - let f = new Face(info);
" q9 ~, w# p3 a) @0 l8 g1 B - state.f = f;
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- let t = f.texture; j* O3 V- D& v& P
- let g = t.graphics;% s4 z% o$ W: a' `% X' s0 g% W, L
- state.running = true;
! s! ]- I: D+ o" u; G% W - let fps = 24;" y" R- Z3 L" e, x/ f- ~" x/ X. d
- da(g);//绘制底图
2 S" O0 M2 ~ q5 _$ X - t.upload();
, Z2 C$ I/ p4 y3 E. m - let k = 0;, |! c1 b3 k3 R1 k
- let ti = Date.now();! m+ @" R) g: O
- let rt = 0;
" D" S1 V5 l: d1 q2 q - smooth = (k, v) => {// 平滑变化- T$ o/ [7 M6 @7 x6 ^# f) p
- if (v > k) return k;+ Y3 n" j2 i2 P' x
- if (k < 0) return 0;5 P# I+ S6 J3 r( Q7 u! b
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
, X0 s: N( Z+ T1 V: p; I - }
$ n9 W7 m" ` X/ V1 e - run = () => {// 新线程
* ?( H I3 z6 l - let id = Thread.currentThread().getId();5 V5 [ Q4 I0 f% r6 a6 X; S0 n. C
- print("Thread start:" + id);) i; O1 n2 l% S( B( h! i
- while (state.running) {
# p [6 w; v6 m& h) r% M3 L6 D- D; V - try {
" r9 M5 ? h$ R; X - k += (Date.now() - ti) / 1000 * 0.2;5 {1 ^/ j; i" L o
- ti = Date.now();
( o: ]& X3 O2 n3 I7 u( g5 l8 t - if (k > 1.5) {
6 u* ~" Y( X; |- }6 _ - k = 0;
) v# ]: q; K: ?/ O - }
! R& Q7 ?6 }& ]2 N. c( g3 F - setComp(g, 1);8 f) _- ^( y9 l8 |. {) k
- da(g);. b# z% x' `! B0 F! m
- let kk = smooth(1, k);//平滑切换透明度/ k& Y: t2 Z3 @8 _" K6 a
- setComp(g, kk);
! u7 s# `; K* B+ i$ D7 ~: r* {% R( K - db(g);
# v0 N( D8 S1 q3 g5 A - t.upload();8 Z; A: o/ P8 d5 C: j
- ctx.setDebugInfo("rt" ,Date.now() - ti);; U6 v: [: R8 r
- ctx.setDebugInfo("k", k);! c# v& g4 D& r) `+ `
- ctx.setDebugInfo("sm", kk);
9 z4 L, n, d S. H ^9 X* i - rt = Date.now() - ti;
9 {. {& @, D7 r6 E9 S/ E, k9 x - Thread.sleep(ck(rt - 1000 / fps));% u, {% X5 {- |$ c# [
- ctx.setDebugInfo("error", 0)
, r, u$ S" Q9 P; u1 W - } catch (e) {1 ^( I3 | T1 q
- ctx.setDebugInfo("error", e);
% i6 q( c0 a* p$ W - }
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- print("Thread end:" + id);
4 |+ d' [. {0 ^1 l E { - }
1 z6 J+ F/ ]% f7 A) P - let th = new Thread(run, "qiehuan");
1 j* M' g) w# V* ~; j, f- _) s9 e% }$ S - th.start();
3 z; z% {9 J3 A8 r0 [5 z3 `+ y2 i - }
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- function render(ctx, state, entity) {
/ T8 m) Z' L5 n+ [3 @: k - state.f.tick();
5 S# V8 N; z- a - }
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- function dispose(ctx, state, entity) {/ O6 |0 P; N. m0 ?
- print("Dispose");$ m$ v8 Y7 V+ X6 n7 Y# o
- state.running = false;
- s/ _3 |+ c! s4 j+ ~- N6 J - state.f.close();
; J2 G3 A* v: z - }
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$ X0 z# g( a) u) r* y- function setComp(g, value) {) X9 G& N* U/ q4 ~
- g.setComposite(AlphaComposite.SrcOver.derive(value));
6 [/ y2 S8 M* k4 }8 N, s& |" t - }
复制代码 & s- b5 j7 _/ \5 ]1 c
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。/ ]& e0 R' S, m: G1 a. |4 |
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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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