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* n+ o- ^4 W/ R# Y% E) p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。
1 K$ a7 ?* Y6 P) t" v. R7 Q- importPackage (java.lang);
; Y! y$ }( Y k( E# D4 _& B& m - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));3 n6 Z% f5 ~9 { N9 y
" {+ s+ C* d( a; l4 C- f# B- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
* W" r: {8 u$ ~- f) D/ r1 d9 U - let frc = Resources.getFontRenderContext();/ A" s+ `# B: m' S4 N0 K/ p, R
- bounds = font.getStringBounds(str, frc);3 o5 f' d' I) _2 u3 C- e3 d! }
- return Math.ceil(bounds.getWidth());
4 [1 ]$ |, v$ {" M) h' K) W - }
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- da = (g) => {//底图绘制
+ P; k* i) A; ]6 G' W - g.setColor(Color.BLACK);
9 F) Q7 U( p2 s2 n& U K! q - g.fillRect(0, 0, 400, 400);# l* m4 x6 {9 v
- }) q; C H- K# x( E* x
* U$ n* z8 `( s7 q2 I9 ^7 M; z0 v* j- db = (g) => {//上层绘制
4 X$ h3 I. o4 Y9 w4 L8 x; P - g.setColor(Color.WHITE);$ ^1 l8 e ]! _: Z5 H, S3 ?
- g.fillRect(0, 0, 400, 400);
. g! I5 n# u& U - g.setColor(Color.RED); H4 Q/ Y% H7 \. I6 M' \. g
- g.setFont(font0);
: K6 Y2 | `' G+ o6 V5 i/ O% V - let str = "晴纱是男娘";4 J, b( k! ]- g
- let ww = 400;
; o* P* O7 S3 M& M" r L - let w = getW(str, font0);
. g* w# J+ M- H' C9 O& | - g.drawString(str, ww / 2 - w / 2, 200);
$ G7 b( N! `: N - }
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- const mat = new Matrices();- w' A$ l1 f& o) h( b# r0 B
- mat.translate(0, 0.5, 0);
1 i1 X1 ?2 `. i% p; o, K - ! G$ b5 y! f& e6 ]
- function create(ctx, state, entity) {# y- g6 Q) V0 o& `% M. W
- let info = {! X& H( W, h1 T) o A+ b4 }, [
- ctx: ctx,7 v. z U! q3 s4 d( X
- isTrain: false,
/ q; n) c$ m6 A$ R# Q/ V5 H6 J6 v - matrices: [mat],$ x) `# D3 i8 M6 e
- texture: [400, 400],
& r# P: r6 j! L6 _- \) ? - model: {
% s+ E3 {$ B% i+ H& s# a - renderType: "light",
8 i' G/ l7 r0 V - size: [1, 1],1 V2 j: _* ~6 m1 }
- uvSize: [1, 1]. s0 w1 U0 v% J: o2 J8 u8 d
- }
& u+ ?+ H$ h* r4 L) Z; W: {& s - }
9 @) h* ^/ H l9 i - let f = new Face(info);: Z9 E- p4 i7 m# r V
- state.f = f;6 a6 x* W: Y$ e* m- E
- 4 ?3 d7 U- R. D( h2 a2 _: }
- let t = f.texture;
1 J) x% ^# i7 R" B) v9 y9 o - let g = t.graphics;
' T& c" J. ]# h, N9 H - state.running = true;% \* e7 {7 j9 h4 o& H/ ?# D
- let fps = 24;
1 i# j+ K( l2 M3 ~* F - da(g);//绘制底图
6 M: A# ~' j/ X2 w3 z* I' l- x - t.upload();
& F. M9 J0 t8 x c( r: x$ w! @ - let k = 0;
& [+ Y( w) B* H - let ti = Date.now();6 G w* K; x% g, g( c! c; E" q3 x
- let rt = 0;- F7 n9 F0 A: _# U
- smooth = (k, v) => {// 平滑变化
8 m( r t3 B8 _ - if (v > k) return k;, {3 d" A, O. Z$ A; g; u
- if (k < 0) return 0;1 z2 j( [% d' D+ O; `4 i5 ] W
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;- D) a$ ~5 _3 ^5 M# v9 l: v
- }
+ y4 M( |8 C( h% S3 A3 F - run = () => {// 新线程. I. V" O$ L" M9 Q Y
- let id = Thread.currentThread().getId();
. ]1 H9 D" M$ D, G' P - print("Thread start:" + id);9 V5 Y8 R! F9 V7 l) W
- while (state.running) {- h+ `7 Z& V5 |8 Q# a/ G9 c
- try {1 R8 A& u1 S# N9 |% s
- k += (Date.now() - ti) / 1000 * 0.2;0 t; k8 g$ x' r8 W. d4 H% x
- ti = Date.now();
# R5 S- Q' r% ?( ~. r+ n0 ]6 `. X" v - if (k > 1.5) {
+ r# h J5 K# j$ O/ I - k = 0;7 h! Z/ [ P: s3 l3 [. R8 c/ ]
- }
6 Z: G+ a8 ]+ ~1 c+ h2 V( W - setComp(g, 1); v: a, y9 a2 U+ ]8 e
- da(g);2 C) N- a* m% h) \; [& t
- let kk = smooth(1, k);//平滑切换透明度 n& _2 g5 v7 z8 a0 H9 m
- setComp(g, kk);
* I; Z% \, G1 ?' F4 ]# U! ^ - db(g);
) [* I% T. _; U( ~4 X3 C - t.upload();
1 K4 N& C0 b% \2 o" ~ - ctx.setDebugInfo("rt" ,Date.now() - ti);; c6 G- i5 p3 h2 T( ]8 ?0 K8 ]6 F2 V
- ctx.setDebugInfo("k", k);
: l9 U$ k7 \6 U9 T( q% Q - ctx.setDebugInfo("sm", kk);' }4 @! m0 a; \1 s0 S
- rt = Date.now() - ti;4 A7 ^8 a9 W( l% ?
- Thread.sleep(ck(rt - 1000 / fps));/ n( _' Z5 G1 H( W1 A$ h
- ctx.setDebugInfo("error", 0)
, M; d( r- [. L& [3 z7 j3 L# j6 Z - } catch (e) {
) m0 e5 [+ x- G ]" S - ctx.setDebugInfo("error", e); O; ?& Q: c' I8 [, i. B: f& \0 b) u
- }+ |1 G1 z8 |- i+ x
- }8 i/ h' s: d4 W7 P/ v
- print("Thread end:" + id);
+ P2 Z& ?! ^" j; Z - }
" [ _7 f( y; [: N - let th = new Thread(run, "qiehuan");) ^% w Q/ |7 |& {
- th.start();; T3 H2 K( h" T( G: Y) _" i4 @' W+ G
- }
- B: {" o: t1 \* N4 ~ f - # Y- a+ _( v4 x5 [
- function render(ctx, state, entity) {5 k, q" @* h2 Z( |
- state.f.tick();
1 D! \ \1 z: x0 t& @ - }- i; l& V* ]4 F; G& @% h
# O" x9 A3 @$ L$ t6 C1 \8 C. ~+ |- function dispose(ctx, state, entity) {
) k! X8 S2 k5 G0 w8 s5 a - print("Dispose");
2 Y, ?3 F- s. ?2 T0 ?& m& b - state.running = false;7 ?. X; ^( h2 N6 q/ `7 Z7 Q( ?
- state.f.close();
; t: O2 ^6 ]1 j( _5 A! { - }
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9 R0 e8 L/ j/ z& l, h- function setComp(g, value) {6 d1 x8 r- T7 y) d5 O Z% a2 c, t* N
- g.setComposite(AlphaComposite.SrcOver.derive(value));
! A; N" Z' w. ]6 o: b- N' k2 | - }
复制代码 8 f! {, W/ U% V3 A- m
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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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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