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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。
- u! q) L. J7 x" `6 B0 g' R7 ]4 H- importPackage (java.lang);* r9 F- ^# e$ w( a; O- m
- importPackage (java.awt);
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* t; a; B0 y- y# J% A2 R- include(Resources.id("mtrsteamloco:library/code/face.js"));
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) J! Q( w' h( G+ C# q' u. ]- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
3 W( h* e' }3 L* V: }
: | `. t' F& O" s- function getW(str, font) {2 E0 f8 V8 o6 O/ z" m1 ^
- let frc = Resources.getFontRenderContext();
! v5 ~6 ~& x! j - bounds = font.getStringBounds(str, frc);( z( v% D- M# ?) r/ _" f/ L# L
- return Math.ceil(bounds.getWidth());
+ h& P% x- U) s$ l! y! L - }
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+ b& ~4 h& A8 h& ]' l- A- da = (g) => {//底图绘制- w! m" F: G/ k; X' Q' J! a3 y5 ]
- g.setColor(Color.BLACK);# T. T2 x7 Z! V
- g.fillRect(0, 0, 400, 400);) z9 p1 ~" J4 t7 _$ f
- }& k9 P- B0 w& a' F3 Y3 `
- 2 d; p$ k: ~( [
- db = (g) => {//上层绘制
$ N; t8 p1 {% R) }& F+ L0 H' k& e - g.setColor(Color.WHITE);
+ o e! k; ~8 h$ D2 E - g.fillRect(0, 0, 400, 400);4 T+ ^3 A# ? @( A1 R/ b2 T! }
- g.setColor(Color.RED);* W# n I- T6 |% C& d
- g.setFont(font0);& b/ v2 w! s1 c* n* v
- let str = "晴纱是男娘";
5 M: O) d5 D! Z9 @+ d( _# B - let ww = 400;! q2 m2 p$ M* n0 ^! l
- let w = getW(str, font0);6 ~1 z3 Q3 k! R* a/ f6 z
- g.drawString(str, ww / 2 - w / 2, 200);
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! ` [6 V. |6 ^- f- const mat = new Matrices();8 q* M `5 |0 P( H/ s
- mat.translate(0, 0.5, 0);' H& D: q8 f- _: i( u r
1 z9 O' w; v9 F8 [5 Z- function create(ctx, state, entity) {
) K% \( [0 O5 B9 J - let info = {& u% g3 i! N9 S& ^* _
- ctx: ctx,2 O+ V3 U; j2 b% s: k( h
- isTrain: false,! t+ p9 H+ a9 ]2 |% }# v
- matrices: [mat],
, Y8 U8 j8 p: [2 ] - texture: [400, 400],
9 R% O( {1 Y; B+ ^4 E2 W% C# l - model: {1 P4 v9 B. i4 H" @7 s
- renderType: "light",9 Q5 @/ w1 T( I, y
- size: [1, 1],
g# B/ y) r. X8 N o: \ - uvSize: [1, 1]* @& W& M) _' _! T. v6 T8 O
- }
k9 a' R) l+ n; x- J4 K# u - }
3 d" Q' h) a# i - let f = new Face(info);+ l, w/ _3 c2 b% g1 {
- state.f = f;
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- let t = f.texture;0 H, m2 ]- Y3 Q9 R' v7 Z
- let g = t.graphics;
/ t; a) D) f9 ]& A% k- B - state.running = true;* X8 h; F1 n" C1 E" s/ f, p& ~
- let fps = 24;
, Y4 t- o3 n) T; r6 ?7 l* @ - da(g);//绘制底图5 r+ {' f) O! G7 N
- t.upload();
) u0 t7 U( O, L# V$ s - let k = 0;
( c& T; f) N2 E/ f, n - let ti = Date.now();0 m0 P; `5 K& J& [: U' T% j
- let rt = 0;
/ S$ H! G, ^' Y( S - smooth = (k, v) => {// 平滑变化
2 [/ x) C7 Z! y: k% w' c - if (v > k) return k;) H- F9 {7 s I6 w. _8 l: a% A$ I7 g
- if (k < 0) return 0;
) w! x8 i8 G/ A6 z* f# b2 E/ ~ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 P$ p- [0 v; u3 Z* t% B, ^
- }4 L; [4 G/ Z4 h- x& e5 P$ T5 F6 }
- run = () => {// 新线程3 l; u9 B' Z8 U1 L1 V$ c
- let id = Thread.currentThread().getId();9 ^+ d9 Q' b8 k6 w K
- print("Thread start:" + id);
7 |) Q+ l) `. u% @1 `4 e - while (state.running) {
5 Q8 _ N& y2 Q0 d! K U' G. o - try {
- A: B" B$ U. N! |- \ - k += (Date.now() - ti) / 1000 * 0.2;
; W0 m/ X) E+ d/ N; b) Z( N - ti = Date.now();
0 k9 X1 ^# ^! f; B* d3 G - if (k > 1.5) {
/ ]& E) F# E- q: O: E - k = 0;
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- setComp(g, 1);
! g W2 ^; ], t% V" B8 l2 T - da(g);& T9 n4 y9 e+ y4 t: t' _
- let kk = smooth(1, k);//平滑切换透明度
% }4 } L7 l1 J" I6 P - setComp(g, kk);
" _9 u2 D# t3 r) O O1 K6 p - db(g);- u( S& v. `/ Q7 e+ m( _
- t.upload();: e8 g, K) V1 x. G3 J
- ctx.setDebugInfo("rt" ,Date.now() - ti);
! x) @; _1 G; [. J& @ - ctx.setDebugInfo("k", k);( ^# T% {$ K+ Z7 b: o* ` ]
- ctx.setDebugInfo("sm", kk);
( `6 J+ l' W2 M$ \4 y - rt = Date.now() - ti;
1 |$ S# G( G- {% Y( t) L - Thread.sleep(ck(rt - 1000 / fps));. w8 Q# k" C& U/ w/ ]. x7 G
- ctx.setDebugInfo("error", 0)# M: J3 }6 d `4 K; M) R% b* `
- } catch (e) {
4 D% @$ @7 m) M- r1 Y. \ - ctx.setDebugInfo("error", e);
$ ~. y$ ^. o. B/ G - }
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- print("Thread end:" + id);3 H, a6 U" G! O1 p4 R; [. D/ C: \
- }+ {! A7 h g, J' `
- let th = new Thread(run, "qiehuan");
5 L. l: R9 H+ r4 e - th.start();
5 z& g! e4 b# i+ B0 A' p* H# F - }
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2 H+ N+ ]" g' l% u- function render(ctx, state, entity) {
/ m, p8 k# g8 e+ ?' W* K - state.f.tick();
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: x# L3 k) Q7 K$ K$ C+ H- function dispose(ctx, state, entity) {
+ ?1 W7 Q9 h& ] - print("Dispose");2 w& h# C2 ?. z( S
- state.running = false;
- ?) i% ~% z% M$ ] - state.f.close();
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. G( R" k- b- a1 L- function setComp(g, value) {
- H3 M- ?5 f+ g9 _% H5 `' w - g.setComposite(AlphaComposite.SrcOver.derive(value));
: l5 s4 s4 s" D+ B) F% | - }
复制代码 . W1 t8 a( s; `3 l% ~; _" m b6 H
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。' |3 I: D3 g) k' _0 d8 l
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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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