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# M8 Z4 R) x8 q2 x! Q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。/ f! B6 D" E; o% U0 W* G4 J! Z+ L. ?) v
- importPackage (java.lang);
) D4 ^1 @8 f" F8 g7 f, T$ r# V - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
0 h& k6 d5 Q1 f
1 j: w$ E! K+ s+ Q: [- function getW(str, font) {
/ O# r; c: n# m- q) l - let frc = Resources.getFontRenderContext();
; s# ?; f% |, S1 i# T" k - bounds = font.getStringBounds(str, frc);
" ?6 c- T) M% [( B* p# J" Z - return Math.ceil(bounds.getWidth());5 y0 e* | g2 l7 X2 A
- }- R; R W6 U8 F; W
- - P1 ]5 z- X6 [! V
- da = (g) => {//底图绘制: v6 r, }! S N* P: E
- g.setColor(Color.BLACK);' c! @: e+ y5 Y+ f
- g.fillRect(0, 0, 400, 400);
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0 s" h' j$ b) |1 N! C( g% ~- db = (g) => {//上层绘制
5 t, H1 S" ?3 C% ~" w6 E - g.setColor(Color.WHITE);
: }, h3 Q1 q; D* @' w) ]- b+ W - g.fillRect(0, 0, 400, 400);, a1 x* g* d7 y. e: @" n
- g.setColor(Color.RED);
$ X: n4 V! s/ k0 O5 F - g.setFont(font0);% `4 a+ v6 S5 l j
- let str = "晴纱是男娘";
, h1 f2 A3 Q0 i" m. C6 W - let ww = 400;! z! G, W% k8 h- k) x# Z9 v
- let w = getW(str, font0);0 L0 {: A. ]$ l9 i' ?: U
- g.drawString(str, ww / 2 - w / 2, 200);' i( l: V# b& h- |, Q7 ?& L2 B: ?4 J
- }) C- q+ |( M' b" |4 v. N
( S, M P) c. ~9 z- const mat = new Matrices();* v- n+ s5 I" |% P6 z) y
- mat.translate(0, 0.5, 0);
; J4 E/ f' N3 N B! N% {
$ ^5 b/ o: t7 a- w, W1 U; [1 L8 C- function create(ctx, state, entity) {
+ d7 l) [, i, @9 T - let info = {* H) O- x% D: w) \4 c: _
- ctx: ctx,
3 H' F/ @4 f8 m* ~' i7 _* j - isTrain: false,+ F) l8 X* Q8 }; Z; h
- matrices: [mat],. q5 {# e8 P) @ A! v
- texture: [400, 400],
5 G; r. P3 \: C, Y5 p - model: {
+ b9 I& w/ W( x5 {' @ - renderType: "light",
5 Y! D9 M1 P$ w6 l - size: [1, 1],
0 p+ C/ v% n. x/ t - uvSize: [1, 1]1 u+ x3 J, [" J5 P2 H3 l
- }
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- let f = new Face(info);
3 v9 d5 r5 N6 |8 z! N - state.f = f;
, S s5 j, @, a& Y+ P {+ J5 S2 Z
% [5 e+ t$ L: x& ]- let t = f.texture;# V% Q! m9 L. r; l
- let g = t.graphics;* E0 b6 {3 _) a- W
- state.running = true;3 g7 e7 i U, Z: c! Y# o- E9 O* ]
- let fps = 24;; z# f; K$ [" }, T: r
- da(g);//绘制底图
# n( o: R6 b7 g X7 N; j( N% y# h - t.upload();' Q6 D9 H& x2 c1 j2 w+ H* T
- let k = 0;
9 ?3 x% p. a9 i! M6 [* @. D - let ti = Date.now();3 W8 D) Q* `3 C( S q
- let rt = 0;: t K) @2 k! I* b/ P
- smooth = (k, v) => {// 平滑变化
$ N& K% v- g- v$ t7 p1 d* Q5 Z1 V) R7 ] - if (v > k) return k;
" h& r2 f3 Y4 B( G! w3 P7 _+ h* e3 K - if (k < 0) return 0;* ?' ~* f% c; E c) G
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;, W% i' c' X2 g
- }- O0 p6 A4 f: b6 b
- run = () => {// 新线程4 ^' m" z: o4 _" D
- let id = Thread.currentThread().getId();& @7 V5 i3 w' y( s G$ ^
- print("Thread start:" + id);& W7 J# G: c) S( s E
- while (state.running) {5 B/ q! }8 L& Q& j3 e7 u& J( k
- try {
# _! A0 X# l( m. F3 s5 b* Z1 ]7 l - k += (Date.now() - ti) / 1000 * 0.2;
4 W0 s2 P+ Z% D8 f1 H/ T5 t9 z) k9 h - ti = Date.now();
. P4 C4 i8 H& w' G4 m' n - if (k > 1.5) {
; o# z: c5 ^; ~& y - k = 0;! i+ S/ B8 C( O/ }* k
- }
9 J9 F) g9 U! U& I9 f3 X - setComp(g, 1);( i$ V; t* O5 }. Z
- da(g);8 C* E/ D$ i- ]
- let kk = smooth(1, k);//平滑切换透明度+ x* ]! ]# M, ~8 x$ y C M: l) n
- setComp(g, kk);/ r5 H2 d( @/ H6 Z7 B: V2 F0 g
- db(g);- x8 k: L5 ?; {+ w3 v% k0 |
- t.upload();
$ U2 }' g! m- s/ h3 }: j - ctx.setDebugInfo("rt" ,Date.now() - ti);( W) y8 a9 O5 a8 F/ U9 G' |9 d
- ctx.setDebugInfo("k", k);5 x; B* Y0 [+ X/ O! I* m! v; N
- ctx.setDebugInfo("sm", kk);
0 F' w5 u: \- O: | - rt = Date.now() - ti;
7 ~% T2 K. y7 T% g - Thread.sleep(ck(rt - 1000 / fps));; G3 G& @8 N3 g) z1 ?1 U3 K3 f' x
- ctx.setDebugInfo("error", 0)- i( l p5 J; ?
- } catch (e) {
( ~' z6 k1 Y7 Z# T$ d! Z0 F - ctx.setDebugInfo("error", e);
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- }$ S" I, {2 w- n8 ~" R
- print("Thread end:" + id);0 ?2 h# i3 M& V6 f. a+ r* V
- }
/ f3 Y. p7 j+ T$ s6 e5 u - let th = new Thread(run, "qiehuan");0 o3 k _8 d) \1 ^& P" {# |
- th.start();
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- * J% K# e+ M% M Q
- function render(ctx, state, entity) {
+ n+ v2 R6 f+ T C - state.f.tick();' ~8 M: U' \3 P* I% I6 z1 J0 ]
- }; c4 X# ]8 R1 U0 }
9 E+ t# ^& p8 ~# M9 U. j8 K9 X1 r, l- function dispose(ctx, state, entity) {8 M: @& O( a6 ]0 g
- print("Dispose");
" D. s: t) g& r+ T/ P - state.running = false;% C. n: A j9 c; ~6 B
- state.f.close();
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5 k, v' B: q7 I$ e& U3 H- function setComp(g, value) {1 W8 x u& i) R6 J( c, L8 U
- g.setComposite(AlphaComposite.SrcOver.derive(value));0 H# d7 H2 n( ]( ~4 M: [# B! v
- }
复制代码 9 H3 {: f7 M) t% g; Z5 O, f1 Y! ^& Y
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。) b1 D) r" v: z
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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)3 h" Z* `) T& A# \7 Q" V& B+ A
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