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6 c& M) l+ y8 w- ?: y) U9 q' t. w0 S. X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 n- W S* d {& W' S- importPackage (java.lang);! Z0 Y' R/ \, }7 d9 t
- importPackage (java.awt);1 w2 r" n2 ^ L& U+ J9 ~2 a# u
o! k3 y- K) J- include(Resources.id("mtrsteamloco:library/code/face.js"));& t+ `, {+ C$ W0 h j# _- {4 k
- 1 ^! _7 D2 L/ v+ w) x/ W2 D7 J
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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* f7 o$ ?. b0 c9 B" d- function getW(str, font) {+ W: {1 p) J3 k- y! s. r
- let frc = Resources.getFontRenderContext();3 a: B. E8 ]# D
- bounds = font.getStringBounds(str, frc);( L+ ~. F2 r: N
- return Math.ceil(bounds.getWidth());5 q7 N3 w$ j# Y: O& D
- }; k/ Y: q% U& c& _& Y
# B- U0 V% E: s' y, R0 V2 x( [7 j7 h- da = (g) => {//底图绘制, \* k" v# I$ E5 k+ V h
- g.setColor(Color.BLACK);1 b( I& k6 `2 V4 G% D" j; J
- g.fillRect(0, 0, 400, 400);% X3 n9 R1 M F0 e. g
- }! e9 I; j$ ^3 ?2 z
/ m5 N5 \) b3 s6 q- db = (g) => {//上层绘制
$ V5 M5 u8 s2 L1 x4 C. |3 G# E0 H* r - g.setColor(Color.WHITE);# m. e" _5 G2 T
- g.fillRect(0, 0, 400, 400);
) a1 ]# S6 S, t+ a! S* r) } - g.setColor(Color.RED);
) \, ?* }. E1 x& I: y' G8 P - g.setFont(font0);
+ y" a/ v2 f- T# n: p0 C/ g1 v7 ~ - let str = "晴纱是男娘";: A7 D: V+ R: A' _/ } J
- let ww = 400;
, X: M" q; e+ s5 {; S - let w = getW(str, font0);+ i9 _2 X( t5 e3 B `" H, T6 c
- g.drawString(str, ww / 2 - w / 2, 200);( I/ j4 [2 I1 W1 i
- }
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3 T3 k3 P; e- W9 c7 A- c! J- const mat = new Matrices();* U$ L( Q5 Q% }- r. e2 _
- mat.translate(0, 0.5, 0);1 m& [- ~: }1 n
i4 m( a7 e( d0 g: ]2 b [' e- function create(ctx, state, entity) {5 x6 |$ E% O/ O; {/ Y
- let info = {
9 V T' ~# C: Y7 w% k( k$ K - ctx: ctx,% g8 I& u0 C+ w0 k; _
- isTrain: false, q9 ~ ?+ `" j7 N* O6 ]
- matrices: [mat],
/ \5 A* l8 Y/ f* R - texture: [400, 400],
% Z$ O2 ^2 o9 n& d - model: {3 L! O5 |* U. T Q M, \& z
- renderType: "light",' \, p- I6 g1 d0 K
- size: [1, 1],
; ^* g4 D8 C8 j9 j4 L& M& M7 Q1 G - uvSize: [1, 1]
7 n3 K4 i5 Z4 R% @. C/ A! V - }
' n- S' M+ Q7 j* U, M - }
' K( w% n" c+ {1 Y2 { - let f = new Face(info);7 h# i+ z& o9 N( C# a# |
- state.f = f;
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+ H$ c% w: R9 E5 J/ H" [- let t = f.texture;
% F6 R$ b1 }% j) i& n - let g = t.graphics;$ H& ~$ e% Q% }. @8 O
- state.running = true;; f* ~. L& E4 ?4 C& g
- let fps = 24;# i9 Z. p/ t3 ?: }
- da(g);//绘制底图2 p" g) R$ u0 \( g
- t.upload();! C9 |" H* Q4 W
- let k = 0;
/ U9 o( n4 `. A6 d& X - let ti = Date.now();$ K D) L: L0 x8 ^
- let rt = 0;. ^5 Q$ ^' ?) W
- smooth = (k, v) => {// 平滑变化
. q" h4 H2 t' p* W+ P3 C; s# H# D( d - if (v > k) return k;
3 m+ @# x8 ]: I( _, l - if (k < 0) return 0;
9 Y3 c, \% ?- M9 U - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
# D) o/ X4 ~. c0 u% j3 C$ ?% h - }7 v3 A9 ^* P; i# g. N
- run = () => {// 新线程9 u& h5 q8 |3 l3 l0 t
- let id = Thread.currentThread().getId();
+ |5 o3 e8 j+ {/ s - print("Thread start:" + id);
+ f* S: U0 E* O; @ - while (state.running) {
% N3 Q4 T7 f8 V8 q' ` - try {% i: |' ^, S7 Z- n! s$ L4 H g
- k += (Date.now() - ti) / 1000 * 0.2;
' K) J# f; z7 Z' h6 P - ti = Date.now();" M0 L2 f3 |$ f }- Y
- if (k > 1.5) {
* Y; P2 ^# p A; u0 k - k = 0;) i1 {# U( X6 Z. n
- }& N4 Q( p- I4 l+ p; Y- v" X! S
- setComp(g, 1);# B8 a1 g' f1 H. J* o+ R$ | C
- da(g);
, }$ f/ H9 r# z; Q% C - let kk = smooth(1, k);//平滑切换透明度" h! C* Z; O. M
- setComp(g, kk);
! Y: U8 _0 X3 h; n+ C- G - db(g);
7 w, s* R+ H, Y5 P! [* ?: @ - t.upload();; f0 q) @' k& ~/ D$ |+ ?0 j( p* z
- ctx.setDebugInfo("rt" ,Date.now() - ti);
: J" t* O( c7 D$ Y - ctx.setDebugInfo("k", k);
0 t! \$ x/ h2 I1 L% _ - ctx.setDebugInfo("sm", kk);
5 a" [2 j4 i. w1 T - rt = Date.now() - ti;
" x4 Q4 ^5 @& S' ^0 H - Thread.sleep(ck(rt - 1000 / fps));# @) d9 j' A# ~- s3 o+ J
- ctx.setDebugInfo("error", 0)- m2 D$ o5 @* w G4 s' o
- } catch (e) {3 B Q. V1 [9 w, v! e
- ctx.setDebugInfo("error", e);
; Q9 {2 D+ L1 J' e6 v% D* r0 N - }% Y$ I; U7 |0 f4 J# a
- }
t" B& m2 ~1 P/ n' N( | - print("Thread end:" + id);
1 t' D( L/ ?' i$ M% C - }
' x0 a" a& H! n4 S+ N - let th = new Thread(run, "qiehuan");) y( [; l$ `$ T9 S. S9 ^2 N
- th.start();
1 J. S. c6 P$ E& L( b( q, a - }
, _" W/ O, S m$ e+ r' O1 f - ) w* A. X: g1 H) h- U
- function render(ctx, state, entity) {
/ i6 _4 W" h& m0 | - state.f.tick();9 {, W, Q b2 B, v
- }$ i l( G# b$ ^9 Q8 j# g+ j
- $ ]* q! U7 E9 O$ @ J& K
- function dispose(ctx, state, entity) {4 s7 D! k+ k+ z! g( F u8 }' e4 W2 U
- print("Dispose");
1 o: ~) `3 w" i5 |8 D - state.running = false;1 `$ N3 ?( D3 k. V5 _) [+ ^5 t( O# ~
- state.f.close(); W) D& M, \! v. W( k- l4 H( k
- }
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- function setComp(g, value) {
- q& i5 a2 \7 `& P. U - g.setComposite(AlphaComposite.SrcOver.derive(value));8 R O0 L& t e- g, ^
- }
复制代码
% B) H4 Y7 Q$ k9 f+ @( J6 B1 f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。% H, z) @% A2 z( F4 ^
* j" K! W+ Q5 z* k) m" }% s) ~- w
! M- H& S2 w! Y* ~# c! w$ y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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