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k! J2 ~/ z2 n( J; P6 y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 l3 u, a% v7 a. H) n) U
- importPackage (java.lang);( X. n/ x6 d2 ]5 b( t0 J6 }, p2 N( ?
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));2 e$ C" |( n+ b L% _/ t# k. Q
- 4 K' J8 l, w* U7 _8 P5 _7 x
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);: M9 X2 h2 g; {1 F
M' q8 O5 d0 {2 c- function getW(str, font) {% V$ O2 k$ P$ k+ m0 p
- let frc = Resources.getFontRenderContext();5 Q5 _7 u, y! a7 e2 Z n! q$ a8 U! b; [
- bounds = font.getStringBounds(str, frc);' T$ O U( w( `+ A, a: C" R' q
- return Math.ceil(bounds.getWidth());* {4 J; Z! K1 A* O2 Z0 U
- }
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- da = (g) => {//底图绘制: N- U1 Y+ h7 f- L0 Y4 b% R& i
- g.setColor(Color.BLACK);
2 N" \* n0 o, _. [. V) G, i# ~ - g.fillRect(0, 0, 400, 400);
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- db = (g) => {//上层绘制
+ _: U/ O, m5 l( p. l4 S: I9 f - g.setColor(Color.WHITE);
7 N3 {. r) c9 ~' @" D O - g.fillRect(0, 0, 400, 400);1 V8 z5 H4 P( y# p a& v* }
- g.setColor(Color.RED);0 b+ a# A( ?8 h* E
- g.setFont(font0);
% Z4 Y; d9 f) d. ]% X - let str = "晴纱是男娘";
+ d) y8 C0 @* E. Y- `3 Z8 ^+ o+ o1 J - let ww = 400;
* G# U ?% V0 D1 E q1 r - let w = getW(str, font0);' S7 q. V- g! b2 p) r
- g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();: f- z4 G: D7 A& ~
- mat.translate(0, 0.5, 0);8 X8 o/ {4 r) D- K3 L
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- function create(ctx, state, entity) {) Y8 {( E1 @2 D
- let info = {
- w- U* T7 B" U$ j - ctx: ctx,1 P, Z: b" [2 l" @) B5 ^% h# N
- isTrain: false,. d `* ]. i9 D7 z) V2 O" \
- matrices: [mat],4 S1 U$ v ^) c+ f3 x/ J+ |: _ U+ S" M
- texture: [400, 400],$ z- G; ~& O( ]' t
- model: {' h: `$ r+ q) q" \
- renderType: "light"," u0 E% W4 H% S& S* z# g
- size: [1, 1],9 `- O& Y( b$ D2 N* T* q
- uvSize: [1, 1] ]7 x. J# C" B$ M$ U8 |$ m; H
- }1 j X2 v2 r$ Y8 K
- }
4 M- W: I7 X( f3 u4 c* m" } - let f = new Face(info);0 d6 y* D$ k% C+ q6 u
- state.f = f;
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- let t = f.texture;6 E0 Y8 A6 H( m4 R C0 C
- let g = t.graphics;' R+ g; @, M. A8 r' p5 f- h" ]: @
- state.running = true;
# l& I0 W5 z7 R6 g( |& G9 W - let fps = 24;+ k/ q0 x. y& I) {/ P
- da(g);//绘制底图) H- P( q2 L- e! g9 K
- t.upload();
/ w6 [/ c0 P% A! V. R4 L+ c - let k = 0;! N0 r' M' ] a$ C' ` i
- let ti = Date.now();2 Y; |5 ~9 V3 u1 y/ X% L
- let rt = 0;
: q4 A" @+ L& A - smooth = (k, v) => {// 平滑变化, Y) P. F8 k4 k& F: M3 H
- if (v > k) return k;
$ w! i) z; _- R - if (k < 0) return 0;) t* [2 E! j* |. \- \! @& s- H
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 {; T o: v+ I. {0 x- }6 e( A
- }! E$ }; s7 D8 ^' L1 D
- run = () => {// 新线程
9 C" E5 h7 B" ?7 |) M6 |% y5 n0 B& U - let id = Thread.currentThread().getId();
4 h/ ^* M3 H: `: ? - print("Thread start:" + id);0 @5 Y* R! D& m! ~
- while (state.running) {$ g- q/ o. s7 s1 f( E* D
- try {: {9 x. j9 `3 _% |
- k += (Date.now() - ti) / 1000 * 0.2;
1 X; F$ n' o# a+ O2 b3 m! C - ti = Date.now();$ @7 U" q6 e' z3 X/ ^% N1 f
- if (k > 1.5) {
0 |) T T; w3 X - k = 0;
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- setComp(g, 1);
. M; M9 V8 J) Q! {* p/ J& q- o - da(g);
3 c% Q# {1 c# j9 s/ ^% d0 a C - let kk = smooth(1, k);//平滑切换透明度4 A. z( I3 L* O4 v7 T R
- setComp(g, kk);
: P7 Y1 ~) _* R# } - db(g);, Z6 C6 v& J+ D! o4 j" S
- t.upload();+ G2 Z. A4 k: t# B+ U$ i( w& n$ C
- ctx.setDebugInfo("rt" ,Date.now() - ti);4 W( y( D6 X$ a: s7 k1 y4 |
- ctx.setDebugInfo("k", k);
' k1 N! l% o: B& b4 e' [ - ctx.setDebugInfo("sm", kk);; A$ p& c" O$ G
- rt = Date.now() - ti;1 [8 @. {% _6 w. L* ]0 L
- Thread.sleep(ck(rt - 1000 / fps));
: |' d# @( h; q; N" E - ctx.setDebugInfo("error", 0)1 t) H6 n4 `, n
- } catch (e) {
7 B5 W; d# \2 A7 u) @7 d* L - ctx.setDebugInfo("error", e);1 y. i+ _' H, X4 M+ U' \) g
- }. }, i$ q5 @: R, J1 Q
- }
/ i: v/ X1 D: `3 ^9 i - print("Thread end:" + id);
: m+ k1 G3 ?9 Q - }
/ V6 o5 k6 J: y- @" `+ q - let th = new Thread(run, "qiehuan");9 a# e" m* \: t
- th.start();2 u+ L5 V9 \4 z7 m4 k0 u
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- 0 R9 R! P2 J, f4 Y% N! c& P
- function render(ctx, state, entity) {- Q# E3 J8 k# p9 e; t
- state.f.tick();9 b. m A( v9 z0 A
- }
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- function dispose(ctx, state, entity) {
) b) G- T: B8 v% A) w1 ?5 c0 d0 x - print("Dispose");
. |' z$ J6 N4 Q0 V - state.running = false;. k H& g/ o! P. p3 ?9 P- s
- state.f.close();4 J5 x" U5 ^; r( e! L* Y8 J
- }
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- function setComp(g, value) {
' [) W, t6 `2 Z6 g& x u# R1 n - g.setComposite(AlphaComposite.SrcOver.derive(value));/ }$ x; S. j# M# u9 F; h N: p
- }
复制代码 ; g: |# _1 D* V+ T5 A, d- t! ]( B: z
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。! c" J) L. A( e) [ E8 J! h% t+ m# f
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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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