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- ~, ^! j( f7 R) m4 G8 F \+ i* w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。. R v+ s2 ]+ V8 l
- importPackage (java.lang);8 |! g1 @( }. f& c$ b
- importPackage (java.awt);
) v: {" @9 M. J3 Z& g9 S% j - - E1 X+ r" C" V. r: b6 Z: I
- include(Resources.id("mtrsteamloco:library/code/face.js"));
% a! u0 Y: f( B! |: P3 H- A9 B - ( x2 ^6 i( i; o4 J% l% g4 Z7 {9 Q% I
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);4 i+ ^4 k, k+ r3 Q( [3 g. _
% D7 m1 i- W' r' |% h/ Z2 f- function getW(str, font) {1 W8 P4 n* K" T! r1 J+ P
- let frc = Resources.getFontRenderContext();
% @0 Z2 Z; h% |! P0 e* c) C, E8 x- M - bounds = font.getStringBounds(str, frc);! g8 M) K. m! X( `
- return Math.ceil(bounds.getWidth());
) N% y9 k; w: S- F2 x - }
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- da = (g) => {//底图绘制 X ]# \3 D% G1 T5 |7 R2 b; E
- g.setColor(Color.BLACK);
$ v0 @+ }# z9 ~ - g.fillRect(0, 0, 400, 400);+ _; I0 e" H: ?% q; i% h
- }
9 v5 x( V" T, }$ s+ K
) o0 M" [7 {& l0 c- a5 E- db = (g) => {//上层绘制
O% H ]" ~/ e9 m# K h( [ - g.setColor(Color.WHITE);5 ~4 x6 F+ W' b
- g.fillRect(0, 0, 400, 400); X$ c/ F* T1 X% `& R! n$ x" R! @/ X
- g.setColor(Color.RED);
; b3 ?3 o6 V! L+ i0 d - g.setFont(font0);
" _. X1 k( k+ W# S! m6 F- M - let str = "晴纱是男娘";
* l% X ^. b w7 G% R# e0 Q: o D - let ww = 400;
$ y% q1 u* w7 V" a* m. b m - let w = getW(str, font0);
D' M/ q/ v* O: n - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();0 s+ U- d: x6 T! [2 g7 e3 w* \7 F
- mat.translate(0, 0.5, 0);7 I" M1 X E; W' d( G/ ?9 _2 } M+ a" i
- 7 c/ J. h( H% L" W$ V' E
- function create(ctx, state, entity) {% E. c/ N# O- M& N) `. v* S5 \+ N
- let info = {4 _, t! ]6 s/ x
- ctx: ctx,3 a5 f( `* Q3 V @
- isTrain: false,
9 o% N9 \; S4 j - matrices: [mat],1 S6 u1 f- O; R) h4 w
- texture: [400, 400],
& A' g/ k( S9 V - model: {8 |3 o3 ^/ {. D) R
- renderType: "light",# O& L" b1 S- R2 o* F/ x
- size: [1, 1],
4 ^) c1 U" z) @. e% F4 I+ c+ } - uvSize: [1, 1]. C0 {' `: e" Y1 G0 t
- }( a- Y5 }9 u: w: c0 E
- }9 s3 ^& Q6 c9 @" P8 E$ c
- let f = new Face(info);
/ X$ H3 d; ?9 _$ m0 ~1 K; g - state.f = f;
1 L9 y) ], J) n2 y6 f, \
/ E% E# ~/ {; u E) s, F- let t = f.texture;
) E( _ y% h6 t! H - let g = t.graphics;2 O5 S# _/ p# k7 C+ ]/ R
- state.running = true;/ [6 o5 n! s q7 [
- let fps = 24;. k% D1 i* Q9 r2 y( z
- da(g);//绘制底图8 L% ^ s; z* z1 J Y. Y7 I
- t.upload();. H: Y. r3 b# ^
- let k = 0;# l; ~* i& \) P2 K" C% X3 y
- let ti = Date.now();' z, g/ @+ Q0 ~, i% W
- let rt = 0;9 v5 {8 J- P1 |& W
- smooth = (k, v) => {// 平滑变化
0 q. Y; r9 `# T, j& O# _ - if (v > k) return k;& u! X. I: H2 z' b4 n* E/ I
- if (k < 0) return 0;, R$ E9 B4 g4 t- r1 s) q& b$ y
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;7 d* K. ] j0 m( Q; K
- }/ I. t+ J6 {& t i/ h: V% q# H, R
- run = () => {// 新线程
2 l6 D, e i) e2 `& P - let id = Thread.currentThread().getId();
/ } j( }6 ~5 D - print("Thread start:" + id);
+ K$ J* |" D/ ?, I1 ]7 ~8 n - while (state.running) {
- H4 _2 [) o) A3 b - try {5 x! `3 J* a$ x7 t4 H
- k += (Date.now() - ti) / 1000 * 0.2;- Z9 ~' N4 l+ f/ U5 v' Z D
- ti = Date.now();# j$ \% q" t6 h' b! |- }0 z
- if (k > 1.5) {
& l/ \) m: W+ R2 N$ a2 }6 {7 m/ ] - k = 0;- e' s" ?, {( n. _4 R ~* t% {
- }7 ?! W- M ]4 } z
- setComp(g, 1);
4 T5 }2 h2 L) h4 n" T - da(g);
4 Y6 S4 M8 n: L. { - let kk = smooth(1, k);//平滑切换透明度
, A# F1 h2 L8 n# M7 _2 _ - setComp(g, kk);
+ A0 @: }: o$ `! @4 T! F - db(g);
! a) C' S7 X; R: } - t.upload();4 o: T8 I8 W3 ]. B( n; N
- ctx.setDebugInfo("rt" ,Date.now() - ti);
( f' F' @. n3 H. D - ctx.setDebugInfo("k", k);* i) @4 G4 ~, P8 Z# v3 T2 s
- ctx.setDebugInfo("sm", kk);
" ?- C& W( R$ I: ^6 C - rt = Date.now() - ti;" o8 F6 T/ M: G3 a
- Thread.sleep(ck(rt - 1000 / fps));/ q3 M5 l" d9 u0 ]& \, s/ U: Z
- ctx.setDebugInfo("error", 0)# G/ t0 l. I' _
- } catch (e) {
x! l% x; T( W, D3 o1 t1 ~ - ctx.setDebugInfo("error", e);6 [) h6 P& N0 o) }5 J. L! `
- }
" I% U ]3 h6 T% g; b& r/ a* n0 L - }# V& _# @& j. H7 [
- print("Thread end:" + id);
S* f7 b! ^/ ^. ?' a - }
3 M* ?7 H* \) N; O( Y) C - let th = new Thread(run, "qiehuan");
# e9 `0 ~" C# `( r* R6 h - th.start();. c- w, q& B8 x ~' C' U
- }. F N8 B% m( h. R5 K
/ Q0 y3 J' i& y }" _- function render(ctx, state, entity) {5 ?6 y- z: N) q6 c% v* B
- state.f.tick();
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- 7 K+ M! @0 u) p
- function dispose(ctx, state, entity) {6 H. u3 ?% X# M5 d( O; y
- print("Dispose");0 A5 S* ]6 _0 Z. y& x" B6 }, I1 i2 M
- state.running = false;
. J0 {5 b( b9 K3 ~( M3 O: }# } M - state.f.close(); A2 G- |- c9 n$ I8 ?! H4 k( w+ d
- }
# t) ^6 g e$ H ~' w2 c9 Y7 R
. |* ? j& @2 g: z& ^/ {% g- S- function setComp(g, value) {
5 [$ |4 O4 r2 H {1 ? - g.setComposite(AlphaComposite.SrcOver.derive(value));
/ l' H) E+ O, D; g - }
复制代码
" M3 ?. W$ E4 W$ `3 ^; c& v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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