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" V, W3 f' X6 H g4 [9 [0 [. m- D5 R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。
2 Y: w5 _7 p8 ~+ z, y8 q- importPackage (java.lang);
1 L- D- m/ J- M& Q - importPackage (java.awt);2 |7 t* u' H2 ]& B# u3 C. A S
* |5 S# b }( M" Q- include(Resources.id("mtrsteamloco:library/code/face.js"));: S, ^; `5 g4 m
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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2 Z/ v" V) O8 |- function getW(str, font) {
9 n' `8 ]$ S# y9 M* ?* ?+ ] - let frc = Resources.getFontRenderContext();) V- r( h9 S6 s! K3 W; B" N
- bounds = font.getStringBounds(str, frc);- E- e x; W0 U/ K' ^* L" U
- return Math.ceil(bounds.getWidth());6 l- E0 f! ^; `0 ]8 l
- }
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- da = (g) => {//底图绘制* l9 M5 [7 g4 p4 R! h8 Y8 }' X7 x
- g.setColor(Color.BLACK);
& V: V4 S. H1 R+ W Y1 w9 r - g.fillRect(0, 0, 400, 400);
# s/ G/ h" v; A, G9 Z7 }7 [0 \5 v/ } - }8 i% h2 `. u* ^9 R8 g- r
! i; X' Q" c" y: i1 C% J- db = (g) => {//上层绘制' F5 K1 X/ Z& U& B; ]
- g.setColor(Color.WHITE);
4 v* n/ o$ k7 \, } - g.fillRect(0, 0, 400, 400);0 d: b2 m# a6 ]5 {
- g.setColor(Color.RED);9 d- b w* q4 b6 ]8 I: G! O8 U( P
- g.setFont(font0);
; C8 l, Y" k. g" w. ]7 t - let str = "晴纱是男娘";& l0 s1 S" L8 n( M
- let ww = 400;
2 H+ `: k' \/ c - let w = getW(str, font0);$ b' l. n" m1 v4 B
- g.drawString(str, ww / 2 - w / 2, 200);& q9 W; j8 p7 V
- }
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- const mat = new Matrices();
5 x" q$ z& U4 i+ z - mat.translate(0, 0.5, 0);' n- M1 x7 A+ y7 O+ c1 k. z
. G% \) b+ i/ N- ^% L4 R% W9 i- function create(ctx, state, entity) {
9 f1 a/ w* K2 g; g5 j - let info = {8 G' w' n8 F4 y# M8 f
- ctx: ctx,
; Q- A' x0 w4 O R9 N V7 e - isTrain: false," r9 Y1 t$ Q" b2 f0 A5 b
- matrices: [mat],; k& |$ l8 T4 L$ O. j1 z0 ]7 ~
- texture: [400, 400],
! K# r: o2 C9 P8 ~ - model: {1 a. Z2 R# e% D! s3 c6 H
- renderType: "light"," i7 m `+ o8 W9 G/ v: L
- size: [1, 1],5 D- }. o! z* ?0 f4 E4 `$ b# @
- uvSize: [1, 1], M: X" v! ?. d( Z. W8 H9 z
- }. H! {0 R9 M8 e k! j+ [/ Z" m: \
- }
7 c7 u. |* p' O; z - let f = new Face(info);9 p# x4 {' G" f
- state.f = f;
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- let t = f.texture;5 l0 O( @4 k" \3 M2 o
- let g = t.graphics;. g$ K& {" X( `" j; t! a
- state.running = true;7 W6 ]$ P7 Y# B/ j E
- let fps = 24;3 K& C$ f& ]' u
- da(g);//绘制底图
, ?& D9 G/ O* E1 A( W - t.upload();
; F8 W. o5 K% K2 [5 s& f/ ` - let k = 0;
& b1 S5 g0 i. `' s z) W- } - let ti = Date.now();
, O1 e4 k7 J: z$ K8 E - let rt = 0;
D% W/ E6 Q, F- E! `8 m' J - smooth = (k, v) => {// 平滑变化: g' E( y1 z) r# q( l: m
- if (v > k) return k;# t$ V, d- \ }' S' m8 C
- if (k < 0) return 0;
2 K( ^- D4 F9 k- l - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;2 h0 A4 B5 N6 `% U4 G
- }6 a* {5 ] `2 h) G7 U% U) b
- run = () => {// 新线程
- e/ Y2 T/ ~4 J4 c/ X" Y3 g" g0 ` - let id = Thread.currentThread().getId();% k, ~2 a3 b' M1 J
- print("Thread start:" + id);) u4 G4 c- F& `# ], f
- while (state.running) {
! x6 `$ {/ |3 E) A z - try {8 s$ ]. A6 t. j; R' ^
- k += (Date.now() - ti) / 1000 * 0.2;
9 b# f. [7 o% b0 @ - ti = Date.now();
8 n4 w7 L8 G/ [% ^3 r - if (k > 1.5) {
* a! r, ~# O& w - k = 0;. M- @, Y* {( T% D$ d: r# g
- }
7 m" t& p7 ^& c& S& W+ } - setComp(g, 1);1 _$ J) ^: E6 }/ g( U" l4 q5 h
- da(g);' d7 F, E6 C7 X# K. t q6 A
- let kk = smooth(1, k);//平滑切换透明度. A3 q; e, ?9 |; `! t
- setComp(g, kk);+ ]7 F- _5 R9 j* u3 g6 p7 x) Z- R
- db(g);+ D. ~2 H$ D9 c0 a: c
- t.upload();
4 m f, }- W/ N2 ] - ctx.setDebugInfo("rt" ,Date.now() - ti);7 u7 }& C9 W8 T2 M6 v. d1 o
- ctx.setDebugInfo("k", k);9 Q1 K) G( J2 \
- ctx.setDebugInfo("sm", kk);
% a; ]' X+ Y \! e! M5 e: p - rt = Date.now() - ti;
/ S, u8 Q0 C S: j8 v4 \* T - Thread.sleep(ck(rt - 1000 / fps));& F* Y3 f. k) c }5 A _
- ctx.setDebugInfo("error", 0)
* w6 v2 f V/ B+ ]) H H1 m; E; Z8 _ - } catch (e) {
N: s( E9 v, |. h3 Y& W- B - ctx.setDebugInfo("error", e);
9 M" j1 G! k6 H7 E9 x/ V9 c - }5 h2 `+ ~3 j. D, ^+ t; _
- }
# F1 ? r3 P8 ]# P - print("Thread end:" + id);
. v: ^" r( f/ }+ j - }
' C% u: |# ?& S - let th = new Thread(run, "qiehuan");+ I* g# ~. I& ?! P! X/ ^# |7 C3 a
- th.start();5 T J# J" B8 l' Q+ c" E
- }& l; X; o0 m2 J5 `" L; y" I
- 3 ^8 T$ @) C1 t N( [. k6 u
- function render(ctx, state, entity) {
S7 v- C: o: |4 l: j - state.f.tick();3 L0 m; [! i2 d& A/ Y
- }" C! z5 X, g: q: m- l* {" G
- ' B! y3 D0 {4 ^; ]
- function dispose(ctx, state, entity) {
# q) L6 Z% y! {1 J& d3 C- \ - print("Dispose");( a& t7 a9 G4 Q0 J" K$ }
- state.running = false;
1 }4 N, {$ w* P: I% k( I - state.f.close();! } q1 k/ B+ _( p" @2 w
- }
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1 e$ _. q5 ]6 A0 q4 v7 I1 Q- function setComp(g, value) {
3 P- n5 u* G, b1 F9 ~# i9 D/ f - g.setComposite(AlphaComposite.SrcOver.derive(value));
! @4 r. k P, b. r - }
复制代码 * X) k$ o. U- U% b- R
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。
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( i& f" _; O3 T4 L( s% H z: H. _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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