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& e: I N' Z. E5 ~/ ?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。
" N% f' ~% f' x1 j' Y' z- importPackage (java.lang);' ^: f; m1 U3 T8 _& H- {: N
- importPackage (java.awt);6 {( w$ U5 D1 m! k4 i
- 9 ^/ F0 |; R7 A6 q) d& p
- include(Resources.id("mtrsteamloco:library/code/face.js"));$ M. W+ p P c) e9 v2 D1 @
& M$ K# h# U& g G3 Y6 z! v* M" A- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);$ b1 ~ }( ]0 E; b
$ C- e5 o0 |# K+ |- function getW(str, font) {
# N; h6 [! V- q6 ~) b; ] - let frc = Resources.getFontRenderContext();4 N9 e0 n6 z% `* g7 }* |. Z& ~
- bounds = font.getStringBounds(str, frc);
3 o6 W3 E" r8 h( t: f - return Math.ceil(bounds.getWidth());
9 h8 l0 g) s% [7 R - }) x8 q' Z4 B5 A* @# z
- ?( }9 ?) H: \+ N. s- da = (g) => {//底图绘制0 [5 _- w; m K' p
- g.setColor(Color.BLACK);
' ]% p9 v% A! l3 M2 E - g.fillRect(0, 0, 400, 400);
. S3 Z$ J( y( \9 x1 |2 ^ - }7 w$ a$ Y/ w( Y5 @* D X
0 [2 j) ~; b% i- db = (g) => {//上层绘制
5 h- r& R3 h0 {; g$ L& ^; u" P5 c - g.setColor(Color.WHITE);
$ H5 r+ n0 }- k/ l6 X$ u - g.fillRect(0, 0, 400, 400);
& L; @$ J8 c& M% g2 l. L/ n - g.setColor(Color.RED);
% w" y3 B4 n. u# D/ O- ?/ N/ w - g.setFont(font0);) Y0 R9 z( o; B- ~
- let str = "晴纱是男娘";
1 d) S" U, n% n( L6 b7 \! p# B - let ww = 400;
6 f4 N; r, D2 f: C9 { - let w = getW(str, font0);
; _7 B7 F- M( Z. U, @ - g.drawString(str, ww / 2 - w / 2, 200);
8 W1 g. F$ |& G6 S( ] - }" W" k( o9 h# D& ` f* U/ _% v
- ! t g4 q* C. c
- const mat = new Matrices();
3 ? [: W( Q/ i7 c - mat.translate(0, 0.5, 0);9 q" G6 |8 A9 I1 Z1 [8 I- z
- / `8 p2 y% M' V- I) M _
- function create(ctx, state, entity) {
) J! q0 ], O* I$ q - let info = {
* s5 {( d5 s [9 \, ~ - ctx: ctx,! |% f; [3 u2 q4 n8 x3 G% X3 g, B4 t
- isTrain: false,6 M2 X' }$ k7 T9 p
- matrices: [mat],! n+ ]% o( P& n& J' t
- texture: [400, 400],
" C$ s& X$ q" X) |- t* D* R - model: {" C0 M2 l2 w0 g9 v# s0 F2 {
- renderType: "light",# e( Y. L. i, f/ E; u$ g9 q
- size: [1, 1],
4 ^ r0 g8 o% |4 L - uvSize: [1, 1]
# n7 `( G4 l9 @3 R7 V1 I, S - }
6 b7 f% }9 X" c8 A' d - }
' Z* e4 A; p/ K; m$ X- P& _! i - let f = new Face(info);
v$ p; \; b ?8 H4 @ - state.f = f;/ R4 m% z8 x0 J* q9 ^ W
- 8 r; N ?# [: Q3 w4 l4 d
- let t = f.texture;' K/ J6 F* h) H1 M! @- }4 V) V5 v( x ~
- let g = t.graphics;
, e) O1 E( Z" i( k$ G0 R - state.running = true;7 Q$ f# P% ?- A. d
- let fps = 24;, s' w7 u2 m; a, v* m- I, H
- da(g);//绘制底图
. O# L: r M P8 F$ p6 x - t.upload();! O% E( H% E2 J. {% W/ M* n" [
- let k = 0;
% \9 E0 {2 h: O% Y - let ti = Date.now();
1 ~% P! ?. j2 ?+ B$ _ - let rt = 0;
3 H* w3 ~; m& L' ~ - smooth = (k, v) => {// 平滑变化2 g: E1 _8 a' I# Z/ l6 i
- if (v > k) return k;
% q* }. _8 F( c - if (k < 0) return 0;, F; {7 E4 n) W
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;& k7 |$ b# A1 \9 R, [2 p' l q+ L; k
- }7 b, T, q! K" O/ U' A
- run = () => {// 新线程2 ^# r5 u* ~6 e% K2 P
- let id = Thread.currentThread().getId();
3 Y I, Z# @7 y" W% V- A+ t, v - print("Thread start:" + id);
8 x! s6 P5 ^0 l" L6 Q% k - while (state.running) {& `3 g; t5 P7 e* H7 S) ~
- try {( h) K H! u# I) D/ J6 J) f R
- k += (Date.now() - ti) / 1000 * 0.2;
4 v/ a, C$ v6 z9 t! @ - ti = Date.now();6 d! I( y1 M: n' Z
- if (k > 1.5) {& z5 }5 }) p2 u% I8 ?7 b
- k = 0;$ Z$ T& X) `+ \9 A c& _ d1 S1 m
- }
8 O2 d! _) I6 U) H: o - setComp(g, 1);. O7 G. {' T; r% k( X8 _' f8 A
- da(g);
1 g* ~# u) ~8 C7 M( N. A5 { - let kk = smooth(1, k);//平滑切换透明度0 y8 |& l% Y/ x0 j1 G
- setComp(g, kk);
+ w- Q: C( X# q' t; }' X' W - db(g);, q2 P! }$ V7 n( z' E8 K I
- t.upload();
K6 [+ W& Q9 V" \- Y0 j6 e - ctx.setDebugInfo("rt" ,Date.now() - ti);
! a |# F+ J& n. { - ctx.setDebugInfo("k", k);* T$ a7 U1 A6 v
- ctx.setDebugInfo("sm", kk);' R, r( U) E2 R# e9 u- g
- rt = Date.now() - ti;, u$ q2 l$ u, ~" e
- Thread.sleep(ck(rt - 1000 / fps));
7 s9 @+ G! M5 h) \5 I- C5 S - ctx.setDebugInfo("error", 0)
6 ^1 r( d/ L% y5 b* b3 f - } catch (e) {; C( W: ]2 x) _! y" @0 F" I9 y
- ctx.setDebugInfo("error", e);! l( x! h2 ?% j2 ?0 i; q5 t" T' [
- }
4 y0 ^- H5 k1 q, U j0 W( b9 B5 M - }
( g/ r% h, S9 B8 w/ M' Z* a( K% Y - print("Thread end:" + id);
) P/ w: |- y6 P# Z4 g$ b" j) B - }
7 z& Y8 v& s! p" L3 e. Y" B# _* q - let th = new Thread(run, "qiehuan");
8 `5 T8 A/ r$ B* u8 Z - th.start();
) v( R, V8 A" d) V: Y" W - }
+ d6 u" t# L4 v8 A0 P1 s8 m# S- J( d
) N* T% k& L7 J( }% \$ ?3 a3 G- function render(ctx, state, entity) {8 b- W+ Z- X# Q6 ?1 A. f
- state.f.tick();* Y" s# N0 T; Z, V# J' I$ O ^6 `# \9 e
- }/ @7 q7 Q$ E+ H0 s0 s1 I- d
- . z9 a) ~! t1 b3 M7 }
- function dispose(ctx, state, entity) {$ ^8 }4 W$ ^& S8 ~" U
- print("Dispose");9 G2 Y& z8 A- ]! u i& N
- state.running = false;6 U4 _/ s4 d4 k3 K7 l1 p1 U6 S
- state.f.close();0 Z9 v/ V. ]9 l# R
- }
, P% X& X/ |! i) M7 ^+ i4 F2 C
% _, C5 G2 q$ p- e ^1 {2 g% x( U- function setComp(g, value) {
( }0 M% J7 n$ k, o* [+ C+ @ y/ a4 o - g.setComposite(AlphaComposite.SrcOver.derive(value));
# w! v. S% ^# m' T- m6 S - }
复制代码
( w6 `4 S6 q3 j/ Z C! E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。% ^, {& P, P( n! E" Y X+ a
6 T/ S8 y6 f% \; A
/ m0 L0 o0 B+ F3 x( E( u% C9 M) f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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