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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。7 S- Q: c, s9 E4 y
- importPackage (java.lang);
! o9 B6 J2 |& c2 {* J4 u% u6 |* E - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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% r: z6 H( v% X2 d- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. ]5 Q2 R8 L' U1 ?) z% [) i
, P U& T3 ~" Q8 r! e3 \# P- function getW(str, font) {
; ~! \) o( n k - let frc = Resources.getFontRenderContext();, s4 b) x2 I1 ]5 y) X/ `
- bounds = font.getStringBounds(str, frc);' N7 U v( ?/ M6 Q8 l- x, z
- return Math.ceil(bounds.getWidth());
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. ~) J- n; O, j4 ?2 b- da = (g) => {//底图绘制7 z' y" h; i `' O3 g7 `$ y/ i
- g.setColor(Color.BLACK);
6 B& i9 R$ L1 g. V4 A; g2 }: y - g.fillRect(0, 0, 400, 400);
5 e0 ^% t. i2 j! o. [ - }1 e, H- r+ M9 Z8 q4 L( P/ O
% w# Z: j1 k( K9 L! r7 [- db = (g) => {//上层绘制
) {& B: a* m1 x" D ~9 y - g.setColor(Color.WHITE);0 `; ?7 j* _" L! B- Y X4 J
- g.fillRect(0, 0, 400, 400);
0 X1 b6 C/ W: J( i+ q - g.setColor(Color.RED);
1 V! l) h" n* c; H - g.setFont(font0);
3 j6 s n, c" W& U( w; A - let str = "晴纱是男娘";1 o5 u/ _+ k" Z( g6 G
- let ww = 400;
" o2 h4 A1 o0 D+ l2 ?$ J3 u9 N9 J - let w = getW(str, font0);/ r& Y& _) \4 R7 Y% W; ]
- g.drawString(str, ww / 2 - w / 2, 200);7 p I# P- t: q5 a" h L; U
- }9 e- v0 @ { L; {' q+ t
' Q2 R, |0 h* K+ d0 w {- const mat = new Matrices();; e- a* b8 ]* }! M w
- mat.translate(0, 0.5, 0);" y- B+ l) X' P- [+ Q
- ! O7 a% k+ ^% s4 u$ {: E$ p
- function create(ctx, state, entity) {. @/ _, a) X3 Y3 L2 u
- let info = {
) R! ]" [2 j$ p7 P - ctx: ctx,
! ]: k& B2 \& K$ e - isTrain: false,$ Y0 |# K- x p& E4 k& u
- matrices: [mat],
8 X \: V0 p5 `. f' ^, c - texture: [400, 400],3 ^- {; V1 U% b
- model: {% C$ i2 U6 Z, x/ J. r% X
- renderType: "light",
, _. q0 n( b8 E6 S0 m o8 J8 ~# Y - size: [1, 1],
7 `+ I1 Z9 q2 W- r/ f6 { E - uvSize: [1, 1]* f A" e5 G( x# m& \9 a
- }
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- let f = new Face(info);5 D& l2 ^" m# S q6 B
- state.f = f;3 \" o% d) e$ ]. Q/ r
2 p5 o6 K' J; u0 v0 J7 i- let t = f.texture;2 B" x/ v& |& m0 ~" k' l& k
- let g = t.graphics;" Q, R6 R% G/ @; _
- state.running = true;
8 H. M! g& X, o, M2 A' d - let fps = 24;
# }7 ^. }. H, n5 _, q# j/ H/ M - da(g);//绘制底图8 P3 }5 R! T! l: G/ ^, P2 y
- t.upload();
8 @) ?& L, ^7 U8 j( f! f" ` - let k = 0;
& l$ _9 T' i1 @5 X' E l - let ti = Date.now();0 u; `: v2 E. v1 A% t6 l
- let rt = 0;
3 j' i) v5 Q; T, j }/ w9 U$ r - smooth = (k, v) => {// 平滑变化( i' q2 ^6 Z3 R9 m
- if (v > k) return k;
* o' H2 {2 @; v - if (k < 0) return 0;
( p+ p' P$ P! D& f6 [1 ?7 A - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;7 ~# ?( F' |+ G) @# c
- }
* p; V3 d1 G3 Z% r8 w7 b5 X4 q9 \ - run = () => {// 新线程% D! b( J) _) o; i* T, E# H2 }
- let id = Thread.currentThread().getId();
) N1 ~: `. N$ ^+ s# x - print("Thread start:" + id);
% q+ X5 o- {+ y0 `: e$ u, f9 _ - while (state.running) {" O9 i. F& c6 ^8 U/ b
- try {' _) F7 Z1 D6 R+ w
- k += (Date.now() - ti) / 1000 * 0.2;
/ y" B( V$ ~$ J7 o! h" A$ m - ti = Date.now();# \5 o- u5 W6 d8 ~& Q- `
- if (k > 1.5) {
6 E3 X9 r* ]2 \7 |4 D9 r7 G% H - k = 0;* U% Z6 R- r) E& u
- }% M* D, ^" A1 D( v( `
- setComp(g, 1);
1 D, Z, x3 L/ ?" _+ j% i - da(g);
/ Z) a+ |8 a+ C% S! y* F - let kk = smooth(1, k);//平滑切换透明度
4 U0 O3 D# u K( S7 d: Y$ |! i4 I: \ - setComp(g, kk);
3 }5 Z- I* ~6 c4 ? - db(g);5 }. O9 f. E4 @: M
- t.upload();# E8 y- z* Q/ d$ w
- ctx.setDebugInfo("rt" ,Date.now() - ti);1 |, b2 U3 _, _1 `
- ctx.setDebugInfo("k", k);
9 g% c7 r( x6 W; n1 i0 L3 F - ctx.setDebugInfo("sm", kk);& P9 Q( q3 y. y
- rt = Date.now() - ti;" L2 _* q. D7 b0 B+ {
- Thread.sleep(ck(rt - 1000 / fps));' G# c6 U4 j3 z) b6 T
- ctx.setDebugInfo("error", 0)5 M; T6 R+ v' ^, B
- } catch (e) {
$ S& }3 H Q" [/ i g s* [ - ctx.setDebugInfo("error", e);, c6 ^' N4 ~3 R! O9 O
- }! Z! r9 t0 ~2 ?2 \& k2 ~- ]
- }0 c% ]4 _' E, }- A$ j& f
- print("Thread end:" + id);
. @ m9 Z$ m# }3 H5 g5 M2 c3 x - }. m$ p P$ D" N
- let th = new Thread(run, "qiehuan");
. W% @0 |, ]0 j) R - th.start();9 f) ]. e; K* r h$ I
- }
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- function render(ctx, state, entity) {' N1 [7 W3 d8 v" ^, T5 W D( ~
- state.f.tick();
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- 7 U& G9 s: ~" k/ a" U! B
- function dispose(ctx, state, entity) {
! b z* s) E+ u - print("Dispose");
- O) y9 k. N: ]& k5 ^0 v - state.running = false;+ W( k2 v9 a8 V$ X/ S
- state.f.close();
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, L( E4 M* Z9 I. S g8 u- function setComp(g, value) {9 u- h' |+ I2 M# ]
- g.setComposite(AlphaComposite.SrcOver.derive(value));
" j( @; s6 x2 f% [! o( e: `- M - }
复制代码
0 L% q6 y4 J% }& B f2 H. F* }& x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)5 K; `1 i0 N6 P! U8 u" z9 N
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