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9 o' J8 ]) e1 s; Y: y+ e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。
5 [; X) j8 O \# h( G- importPackage (java.lang);6 C0 U: g4 x8 W; ~/ r
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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( \, m9 c1 t7 }5 {/ L" X& \- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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: R, w8 ~+ ]* ]* e- function getW(str, font) {$ H7 J) Y4 |# s( v' Q0 k
- let frc = Resources.getFontRenderContext();1 n8 m1 x- R8 ~# g8 m! {7 y/ _
- bounds = font.getStringBounds(str, frc);. W" c2 ~' j' {2 `+ G$ i+ {$ S8 x
- return Math.ceil(bounds.getWidth());
$ k) F: Z0 k( v$ D1 x - }
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- da = (g) => {//底图绘制8 L! W* D G2 B2 N( N: k! [! p- Q
- g.setColor(Color.BLACK);
8 a3 e7 H8 u# b! E2 x - g.fillRect(0, 0, 400, 400);
) {( \, q2 d' T2 Z - }
, {- n$ f4 x! N3 m9 F - {4 `' W7 R% x. s* O
- db = (g) => {//上层绘制/ a+ q5 m* K8 P0 P9 X8 i
- g.setColor(Color.WHITE);3 N; t% I0 K$ P# ~8 j
- g.fillRect(0, 0, 400, 400);
3 \# w1 S6 r+ _8 e; Q - g.setColor(Color.RED);
" Q- F4 [7 w( I' v - g.setFont(font0);& U3 J$ ^3 E. l2 D. T5 f
- let str = "晴纱是男娘";
) \ D2 O. |' c - let ww = 400;8 s: x3 M0 b- k! t$ }4 l
- let w = getW(str, font0);
t$ M5 k, u+ C9 g& g - g.drawString(str, ww / 2 - w / 2, 200);3 B7 O, X" r6 t& f2 @
- }( {; n+ E8 x& ]1 N
" S/ N( E6 V) \- b* s9 F- const mat = new Matrices();# [1 Z; B- M* K; Z( S' n
- mat.translate(0, 0.5, 0);% m$ C& M# o6 ?( \7 u8 x
6 n' G, r" L! E8 j5 M0 T; c8 ^) C7 s- function create(ctx, state, entity) {
3 q F4 p2 k' h) O - let info = {+ r& r2 \$ S9 u3 ~& q
- ctx: ctx,5 g( I6 T& }) ]- Y% Y6 j9 E
- isTrain: false,
% P$ f G+ h6 _4 L4 c% g - matrices: [mat],
6 c, X9 `* I7 f* d6 ~# m; v - texture: [400, 400],7 B C4 ~2 T7 V
- model: {7 }6 I5 |8 ]* \/ Y1 g% g
- renderType: "light",- ?3 K1 f: u `+ Y L0 H: O' h8 p
- size: [1, 1],! u% t8 V! X' l0 i, A6 C
- uvSize: [1, 1]
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- }
( @ S& l" H2 K+ C - let f = new Face(info);7 U m& R8 m/ B
- state.f = f;& Z8 {2 j( E/ j+ e x
6 ~; C- w; B: R- let t = f.texture;
3 o: c1 M! S6 ?$ Z" x. F - let g = t.graphics;0 |0 z( I$ R+ Q$ [+ K. ?) v+ `, v
- state.running = true;7 k7 J' d8 I8 q
- let fps = 24;$ X1 x* x3 R/ @1 q
- da(g);//绘制底图
' [! t2 K3 Z3 Q( W6 K - t.upload();
1 M8 T) }: J& g! F( \1 t) _/ T - let k = 0;
4 O5 j" B* U: c, z; @* Q5 h* ~4 [ - let ti = Date.now();
D* u* \ b$ O* ~( y% E - let rt = 0;
4 Z8 B f$ }+ r" J( O3 V - smooth = (k, v) => {// 平滑变化% Q, S% Z8 W# c
- if (v > k) return k;# E# x6 T3 R, P0 @5 G) n
- if (k < 0) return 0;
0 g' Z/ U8 I( D% }$ g; T. L - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
; B3 F: c9 m+ l( b. X3 E - let id = Thread.currentThread().getId();& J8 j8 r/ u' p0 Y' w5 X
- print("Thread start:" + id);3 X# V" F) x5 e& R9 _9 s
- while (state.running) {
; w I6 w% ]) E+ {6 C# r* p4 V - try {
8 S9 B6 J: L% Q$ C2 r - k += (Date.now() - ti) / 1000 * 0.2;
* E/ L# z9 N, j8 H9 f - ti = Date.now();
/ _- G! Y K2 |* @8 z. W. H0 _ - if (k > 1.5) {
% v3 F& L$ G/ @& _# x+ M. N9 m - k = 0;
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- setComp(g, 1);
f U/ r" h2 i2 B - da(g);
4 n& x, C1 v* R- U" O- f5 H+ H; W - let kk = smooth(1, k);//平滑切换透明度
8 ^ b/ [& t4 f" E$ i - setComp(g, kk);
6 j- x: a0 g& e4 B9 G - db(g);
7 F+ v' q" z3 L( F6 ? - t.upload();
0 g% ^1 H |/ t6 n - ctx.setDebugInfo("rt" ,Date.now() - ti);+ L- P, x2 X) f3 ?* u
- ctx.setDebugInfo("k", k);! l- y/ R( n' N/ k+ p
- ctx.setDebugInfo("sm", kk);
; {( E! I4 U/ c1 z& ^8 D8 Q - rt = Date.now() - ti;) t" [( A/ B9 ? z
- Thread.sleep(ck(rt - 1000 / fps));
: u. `+ d/ {" a+ w2 O9 p - ctx.setDebugInfo("error", 0)2 |* g$ d4 X" N' ?) V6 K4 d! m
- } catch (e) {
) c9 b7 t1 z5 J4 {1 y2 @( X% m - ctx.setDebugInfo("error", e);
! g- }9 @5 z% U - }
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- print("Thread end:" + id);
: V3 C: Q" {4 h1 m - }
( \" s) ]6 }' _: f" o - let th = new Thread(run, "qiehuan");+ m1 p) F; q0 c
- th.start();/ e8 y; t$ N" ]# f/ G2 l7 D9 G3 s
- }
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2 j/ C6 h1 e- O( W- function render(ctx, state, entity) {' L; P/ O6 A* |# r8 b" E
- state.f.tick();. }6 s: |! a. C
- }$ M1 q7 j" n2 u# O# d
! Y) h' P2 [6 k1 b7 J; N- function dispose(ctx, state, entity) {
6 M% U6 M( c0 e; ^9 X: b - print("Dispose");
7 w8 p3 w, _5 {. V. [9 Q9 Z1 o - state.running = false;+ g" q! K+ p. _$ t8 N% w$ C
- state.f.close();6 {2 v" Q6 O* q6 k# `2 U. P% k
- }: b8 f$ o( n" s7 x; C
% A9 O5 J+ U" s7 U2 i/ p" K) y- function setComp(g, value) {" {2 L) k+ `' t* D; g" W
- g.setComposite(AlphaComposite.SrcOver.derive(value));
; _' w7 y, A* Y - }
复制代码 7 x5 l# q* a. j" |8 F* e# e" m4 }! L
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。) d% C+ t# T( Q; Y# S; i
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2 q* w$ S7 ]7 z/ Q% S: _) K6 e! I! L, U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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