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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。( B4 q: [" x6 i3 o7 |& K
- importPackage (java.lang);
* t, u4 m! `2 ^8 J. O% ~ - importPackage (java.awt);- a" I. q, P. Z9 S0 m6 c& [
- 1 j1 p3 B! p y( k& w4 r5 o
- include(Resources.id("mtrsteamloco:library/code/face.js"));
' }% N3 c( o; M7 \. ^/ s$ G: {0 K
8 i! U' x# Y% j' z& `! b, Z( n- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
- ]+ a& i/ M# N* D
5 A( J7 O' n/ @9 [4 `9 o- function getW(str, font) {2 x ]. ^6 i+ u1 q+ j+ u
- let frc = Resources.getFontRenderContext();
/ U" p) ?) \5 M7 O, E( @* p - bounds = font.getStringBounds(str, frc);; u6 |: I8 z2 D% r+ T
- return Math.ceil(bounds.getWidth());' q! R8 S5 C2 t O: H4 n- y+ S
- }% ~8 |8 p l4 N0 |$ @( c/ `
- + T( G, t$ u$ B8 ]
- da = (g) => {//底图绘制
# q6 I+ C, p) ?8 m G9 n+ v8 J - g.setColor(Color.BLACK);
$ D7 R" V( S8 O) L0 w* \% V - g.fillRect(0, 0, 400, 400);' s( r- g8 {8 ^$ `0 T
- }* c$ g5 N) n' M$ p# Y9 q
- V: F* ~. T* ^/ g5 n- db = (g) => {//上层绘制' M! U r$ L3 T2 Z; V# D
- g.setColor(Color.WHITE);
! p3 H- m1 L3 K1 M( Y. h. R - g.fillRect(0, 0, 400, 400);) \9 H( X! o9 D2 ?
- g.setColor(Color.RED);; i1 V5 b% T* C3 \! k
- g.setFont(font0);+ I' a+ B* [% w! O& E% g
- let str = "晴纱是男娘";
" K p0 C' f/ m( k0 l# j$ I% v - let ww = 400;
; r0 y5 w4 ?8 M3 g- [ - let w = getW(str, font0);) z/ G8 P1 @1 w- |0 r3 \2 o
- g.drawString(str, ww / 2 - w / 2, 200);1 X+ ]4 j0 n4 {' R
- }
$ B% G3 X2 B" g+ ]
* G7 U* |2 x( O: e/ y- const mat = new Matrices();# E) {8 o' N1 g% \) x
- mat.translate(0, 0.5, 0);7 }8 r# Y! d0 b2 Y3 W v/ r3 d
- , t9 d" \- P, O" S7 q
- function create(ctx, state, entity) {# L+ v. Z% ]$ E7 k- P7 L2 s
- let info = {" Y* F* T8 i( O. X
- ctx: ctx,
. p" ~3 U/ B2 C) A/ ] - isTrain: false,
$ a- ^* ?7 W" \' {7 h - matrices: [mat],& G, ~0 m# ?, {9 O* a
- texture: [400, 400],
% ]& F3 Y5 y _$ `% z- P+ L8 ^' T - model: {. y* j) e1 V$ V% N% C
- renderType: "light",3 h; v& Q) @/ [: w7 [* Q: e
- size: [1, 1],
# ^0 d7 j9 @4 o' C) d - uvSize: [1, 1]( s( g2 f7 b- O2 i
- }
4 i5 T. p) d2 v" j5 ` - }5 n1 t& u* w; ~" I$ |9 g
- let f = new Face(info);
) f) z7 r1 [4 E2 ~5 j2 x( j4 ^, }, N - state.f = f;
! x0 V" D. i+ o8 G# r - 4 k( S7 V6 K5 i* o6 D
- let t = f.texture;
1 {. d: X* c# D4 z - let g = t.graphics;2 f1 [& W" Q' A; i. l, g5 U2 `9 B# m
- state.running = true;1 p/ u8 g3 B5 C
- let fps = 24;1 t/ }, f1 D. `) e
- da(g);//绘制底图! I' Q' ]) R @3 v( } n% V; k
- t.upload();
, ]! Q( D) l( n; [ - let k = 0;2 P( K7 M7 B6 n- R" \
- let ti = Date.now();
7 _ X' D, o$ \' F' Y- K - let rt = 0;+ y% i7 ?% ~. I! v: p5 h
- smooth = (k, v) => {// 平滑变化7 _/ x. f' S! w2 \3 l
- if (v > k) return k;
. n0 i9 B9 s/ b! W, W& d& J - if (k < 0) return 0;
! t- c! ] T$ C+ b& \% t - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; X8 M) ^. K, P: e! A
- }) P, [' S# f$ }; s
- run = () => {// 新线程( u, p1 H$ {; l
- let id = Thread.currentThread().getId();
: W, n( G8 v# T9 K2 X4 T; s' S - print("Thread start:" + id);
# `6 ? b, _( p - while (state.running) {' _+ }$ R$ x$ {0 I* B( x3 ?* r
- try {4 U1 ]! W8 Q$ H" l6 _( R
- k += (Date.now() - ti) / 1000 * 0.2;
5 Y, y+ m; b# c" R2 b4 D4 i - ti = Date.now();
& c0 v3 a7 x( I" g+ e - if (k > 1.5) {
6 a* W! k5 S$ S6 q" b& ?$ Y - k = 0;
+ Y( t4 l9 e" M9 ]! V8 H% ? - }' a2 z: b/ F! u- Y9 t
- setComp(g, 1);( m: Q& q+ K, w* B$ O- ^, b
- da(g);/ ~) I' P4 ~/ s) }% g/ r: \
- let kk = smooth(1, k);//平滑切换透明度3 G2 a* T" m6 ~" ^) z4 N- c
- setComp(g, kk);0 L/ L) w- ]. t0 Z- A3 P4 u
- db(g);
4 C# {) d$ p' H3 o, h" p: H - t.upload();
3 o. p! g+ V, g: n0 o. M - ctx.setDebugInfo("rt" ,Date.now() - ti);1 b. I# J# B3 l- o* L
- ctx.setDebugInfo("k", k);3 O: Y2 O; x! z0 A4 u; ?
- ctx.setDebugInfo("sm", kk);
* a. R8 t6 a& b% i& \* k/ x - rt = Date.now() - ti;% U( |" J+ T1 E" z
- Thread.sleep(ck(rt - 1000 / fps));) r. L' \4 D& W3 E
- ctx.setDebugInfo("error", 0)
$ Q" Z! k. r( |8 ~. r: \, ~! `4 @' X - } catch (e) {
* z* y3 r' |4 w7 H0 j: w - ctx.setDebugInfo("error", e);
7 I, H" V x# `1 c1 @8 O4 c - }+ t# F# K2 o8 ?# y" e
- }
* T# i0 K) ? c g/ V - print("Thread end:" + id);% n" O, o8 k$ O$ D
- }
+ ]% k. J1 }# w' T - let th = new Thread(run, "qiehuan");, {9 `6 p: E4 Z# U7 _
- th.start();
8 T" N @$ W' v4 Y8 N, J1 C - }
, R. i) C7 |$ C* `
, o2 k& ` _# n- W' A w- function render(ctx, state, entity) {
# _! d( n8 f6 i3 p+ W( r - state.f.tick();
5 v9 m" U+ u N* z5 G* a/ M - }; I( c: o! u' c$ S$ r
- % @; ?! T" \+ k: B
- function dispose(ctx, state, entity) {- a4 E7 w6 e3 @' F% G' B
- print("Dispose");
1 Z: n! l& s* e. z - state.running = false;
- s2 Q+ W2 D6 H& ? - state.f.close();
, s7 G8 f8 o. I3 C - }4 }' H8 M- u3 z3 F8 f% S2 `
- 7 i0 L; n1 g- y7 b
- function setComp(g, value) {* s o) I; Q5 F$ P' V* u! [
- g.setComposite(AlphaComposite.SrcOver.derive(value));
. u; w( C# k# [- N$ B) o - }
复制代码
" \4 o- w% }# ?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。2 y" w) a* ~! ^% c1 ^
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t* K! o8 H; D5 M顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)) U2 x3 b) W! ?5 A7 I
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