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2 R3 z5 G$ A- s. c3 B9 k' i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。$ X6 {$ x! j, t3 T% r u
- importPackage (java.lang);
' b' R0 j* ]8 Z+ p/ `5 _ - importPackage (java.awt);& k; t+ }; @9 E& s4 t8 x
" ^" _6 b2 h7 |- include(Resources.id("mtrsteamloco:library/code/face.js"));, Z- ~5 K# E- X8 Y! j' Z
; k; Y( s- C+ E/ G& X3 X- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
( V3 z6 D+ M0 w5 z( |8 D8 v
; r( n" |% n0 {- function getW(str, font) {7 U- ?3 \: l* v% ?5 J
- let frc = Resources.getFontRenderContext();
3 y* V; S# d9 ^3 @- b - bounds = font.getStringBounds(str, frc);5 H' W. n7 x: Y' D
- return Math.ceil(bounds.getWidth());% K6 o# D, V3 Y$ D
- }( m2 ]7 q& r) q' g- w
3 U) Y* n4 D( m- O _- da = (g) => {//底图绘制
7 l6 T4 N9 X: A2 ?" ] - g.setColor(Color.BLACK);
?. x. _) J9 ?9 g6 {; R# d - g.fillRect(0, 0, 400, 400);; p4 T" ]* {; \: I5 v4 j
- }( k% J% ?% s2 l
9 f9 N5 y a* ]$ \% }- db = (g) => {//上层绘制: e; D9 x6 i2 e& a* b" n8 }# ^8 h
- g.setColor(Color.WHITE);
& w; z- u1 u9 R7 i' Z- ^- q# c - g.fillRect(0, 0, 400, 400);
/ q2 W( t# z! b2 j( G$ c - g.setColor(Color.RED);# f, ?7 X) e/ O" e% Z
- g.setFont(font0);* o' F* @: r* p( {& }5 C& v8 L
- let str = "晴纱是男娘";
" C2 @1 N- z+ I4 d0 f W8 t - let ww = 400;
8 o# e/ R- o$ ~* r - let w = getW(str, font0);
( ?( [3 g0 W$ a( S4 E5 h - g.drawString(str, ww / 2 - w / 2, 200);+ n7 D8 h: b& o% Y# b, C0 z
- }+ j3 T& s1 k2 ^
- % q+ M- H4 w! q: K
- const mat = new Matrices();$ C3 m' t3 z- E1 K
- mat.translate(0, 0.5, 0);% f) x- u! l& ]2 j
$ q9 p* h. e9 K/ N! A3 z% L! A- function create(ctx, state, entity) {
4 K; p6 |4 s7 Y/ e0 x! q$ P$ E- h4 u$ m - let info = {' w/ Q) V& N+ l
- ctx: ctx,' j8 ^5 v+ n9 L6 ~" X( b
- isTrain: false,8 {3 B8 Z- B2 g D! t! R* t
- matrices: [mat],
: U# y& q% f$ y# M* Z/ V7 x - texture: [400, 400],3 m# {7 E* f. V
- model: {* e5 x; Z' p2 U+ G3 W! `" Y8 P
- renderType: "light",
$ K3 o7 |' e7 H2 q( E8 E - size: [1, 1],7 O! q4 g% \1 |1 n
- uvSize: [1, 1]' l( C& H* r. l# n: x( F
- }% c% `9 h6 Q2 c9 A9 Y* W
- }8 f8 _1 _ \6 g( `; G/ ^. k
- let f = new Face(info);
4 s: K5 G6 W' f1 _7 L - state.f = f;: s) G1 t3 S# p3 F2 N" o" a
- 0 J" S. T$ P1 x! t% l* z d/ P0 R4 [; t
- let t = f.texture;
# \( B- X% F# j0 ? N - let g = t.graphics;" Q7 x* `1 E2 m: V! t2 Y
- state.running = true;
3 }- V6 U8 v5 r! U7 G3 z4 G - let fps = 24;" s) T- {( c' m2 K! ]! r
- da(g);//绘制底图2 z3 L* ]9 ^! e9 ]) q0 x S
- t.upload();1 M( L, v8 |0 X0 A
- let k = 0;6 k0 I4 V; y' G y o. H# U9 m4 Y) [
- let ti = Date.now();. s9 F1 P$ }+ T A R
- let rt = 0;8 D4 @& v& {+ X
- smooth = (k, v) => {// 平滑变化+ o' u' |1 n) b* m: }
- if (v > k) return k;7 Q+ |+ G5 i7 o: y& t
- if (k < 0) return 0;
( m; ~. c5 ?" j - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* R! g" ^3 p2 N: D+ w - }
' O- L1 k) H6 ~' q1 T+ `# B - run = () => {// 新线程( }; z: R- M' ^- q9 [9 W7 y
- let id = Thread.currentThread().getId();: y; l5 U; _" E6 ~8 Z% [
- print("Thread start:" + id);
7 I$ E0 i, y* l9 f9 Q - while (state.running) {) s; | }9 O6 m9 d) u: ?6 q" D. ^
- try {9 S6 c3 b* x% a: T: C' p; O& v
- k += (Date.now() - ti) / 1000 * 0.2;
) K |5 w. `* k. s/ ?% P - ti = Date.now();/ \" g+ w1 c" k+ j# h+ a
- if (k > 1.5) {
3 N( R! N. D% \* y) E - k = 0;5 T2 r, q$ ]! Z6 w2 {! \
- }
2 L. n$ r4 `' P D8 F - setComp(g, 1);
# l x7 l/ w8 a6 Q% p/ }3 r3 u6 B - da(g);0 y. P, D" M9 k7 _' k: S! Y5 M
- let kk = smooth(1, k);//平滑切换透明度3 N+ u* [: ?6 P% E9 d- u- S9 I W
- setComp(g, kk);2 p" I: B' S8 G# Z/ A6 O8 C9 ~
- db(g);
2 }8 } {3 Y, K! u8 h! L - t.upload();
9 m0 t# x4 h9 m% L$ }, Y- m# A- Q - ctx.setDebugInfo("rt" ,Date.now() - ti);
" m6 v4 }) r" H" y. S0 w2 v: Z - ctx.setDebugInfo("k", k);
4 [" D2 J# J$ X4 v8 c - ctx.setDebugInfo("sm", kk);
* _, Y: w7 a Z: p' C/ L* h - rt = Date.now() - ti;. U* b" P+ t5 P5 C
- Thread.sleep(ck(rt - 1000 / fps));
3 ^4 K5 h# \0 x& S& u# b; G z, H. J - ctx.setDebugInfo("error", 0)/ n3 W A5 l, l$ j
- } catch (e) {' @% n2 s7 J. g5 Z9 m
- ctx.setDebugInfo("error", e);
" D5 V1 q9 @5 u- e" s( W - }4 {- H/ L' a8 K" `+ ^' X, F1 f
- }
' g, i# O' m+ B; A - print("Thread end:" + id);* b5 u) s" |2 P; C/ ?2 Y
- }" [+ ?+ M" s/ L4 R/ l, E
- let th = new Thread(run, "qiehuan");
: A5 m7 {; B. V - th.start();
+ b& h8 c0 l8 C0 L' a0 \ - }! ~. n+ c0 G; V/ _* m4 |5 W
. S1 n- S. k9 r- function render(ctx, state, entity) {
/ B/ E6 E7 `6 J6 O3 Z) M3 ~ - state.f.tick();3 B0 F O8 P2 e
- }
' p# }) G3 R: J z: J - - P2 [% i1 H- f0 F. @0 X: f0 Y
- function dispose(ctx, state, entity) {
$ V: J4 ?" R" o; o - print("Dispose");/ V( x7 J) S4 _6 B: R, e: u
- state.running = false;* O) c6 L: _4 L x U4 G0 u8 J
- state.f.close();0 r" D* o. H K i
- }# I- I6 J# b. {
- 5 y1 I3 F7 \1 s7 y
- function setComp(g, value) {
" A- Z- u& x) j4 a - g.setComposite(AlphaComposite.SrcOver.derive(value));
+ q( e% m" \+ Z - }
复制代码
6 K* v4 J& U7 A1 e' o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。
" O' e; E' a: r7 a
2 _8 i1 i% G! y; `- j
' v# w1 t1 ^6 u/ Y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 c& n3 Y- G2 u$ Q- \
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