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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。. F& H# O9 {6 l! L* ^
- importPackage (java.lang);
: ?; Y9 E) T' h4 S - importPackage (java.awt);0 x8 l" \4 s0 E: x& m3 ]/ j+ H
- & J* F% }% }) h" I4 k; ~
- include(Resources.id("mtrsteamloco:library/code/face.js"));
( @( e/ D) a: N' | - $ U2 b' \# r, S
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
% v- o# X8 r; s. G; k* G& ]0 U - 8 U" L2 c) L5 |+ E" C
- function getW(str, font) {
3 ?; f, {6 e& n; Y& Y _ - let frc = Resources.getFontRenderContext();
4 H$ Y% L5 ^- E9 _, z7 y& W - bounds = font.getStringBounds(str, frc);" E1 [, T( Y! O/ Q; d) O; P
- return Math.ceil(bounds.getWidth());
6 n$ g0 P- e! T- t - }
/ }! b) Q# m. p/ |* _4 e
6 f/ d1 c+ m& K; J' m4 S% U8 r2 ?- da = (g) => {//底图绘制( R/ e/ L i6 V
- g.setColor(Color.BLACK);
' f, R; b' J. l5 J. I) v( u1 d - g.fillRect(0, 0, 400, 400);2 u% ^% ?# G4 w5 v, h7 [" S# |
- }
- K- z+ | M! ]4 c: c+ j4 Q - 2 R2 P8 @# d; T3 w" Q- h
- db = (g) => {//上层绘制- ^, z; g2 P% Q& z5 J v& T& [
- g.setColor(Color.WHITE);/ q+ O' R- R4 ^: h5 ?9 Y& y
- g.fillRect(0, 0, 400, 400);
6 c4 x9 w) \7 z" f0 Z - g.setColor(Color.RED);
! J" P/ J3 v1 A- F$ o3 f - g.setFont(font0);
" Q2 w2 v& m Z6 D4 W! _6 Q. ? - let str = "晴纱是男娘";
, Q! ^( c7 r+ g4 }/ { - let ww = 400;
% k8 p& t2 k0 r2 K - let w = getW(str, font0);' v6 w) e8 y$ _$ a7 a
- g.drawString(str, ww / 2 - w / 2, 200);- v9 N% f4 V4 G, h( [
- }
+ g$ M2 S9 x3 r4 ?) |. G; g
5 [9 B2 c6 j5 `) Z @; X- const mat = new Matrices();* r9 _) J4 m" _" o
- mat.translate(0, 0.5, 0);
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0 O( a, h2 j: J6 s5 I+ A- function create(ctx, state, entity) {# v% R# V: q' \' b: U K
- let info = {8 s$ l9 D6 h+ G) w" P# \, `
- ctx: ctx,
8 I2 ]1 M3 i3 A5 C+ q - isTrain: false," Z/ K% w7 {. g5 X2 @6 K. }3 S
- matrices: [mat],
, {3 M, v0 e7 B6 N - texture: [400, 400],
4 O X F" t* r7 e+ u - model: {
7 J& h9 s. c7 ? - renderType: "light",3 G' y( D0 U1 X; c. x# d q
- size: [1, 1],
9 X2 j. A+ B( P6 x - uvSize: [1, 1]9 J2 k9 S. }; Q
- }% b4 \! |) Z1 S/ @+ V
- }
2 X& C' }+ S1 E# h+ _# K) g - let f = new Face(info);4 x9 C2 h9 R( a' E
- state.f = f;
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3 L( Z- o: V- u% Q6 i( \' k- let t = f.texture;
3 M: |$ ~; {8 B0 a+ h" j) P R - let g = t.graphics;
% ^( |3 S$ k, H6 v$ U/ D - state.running = true;
( ^( @$ M* Q' ]6 { @- t, P - let fps = 24;* Y1 b% q/ A, t3 h1 c
- da(g);//绘制底图! t6 B" V: J# h
- t.upload();
. w$ [, z5 }: p& r - let k = 0;
$ ^: W3 M. g: K6 x+ @6 e# T - let ti = Date.now();
7 @, i! h9 c- t+ p6 h2 o2 a - let rt = 0;
+ n2 ~5 H; R+ J0 t( Y$ G) O; n% q - smooth = (k, v) => {// 平滑变化
3 d6 F+ `* d( w5 W. Q+ \+ Z0 \ - if (v > k) return k;
7 C& R8 D# q. u+ A( |7 V% Z - if (k < 0) return 0;
( `3 C; Q7 f$ D3 ?0 a, d, Z - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
+ z" V$ D& w" K5 [- P - }
( `9 N {) L* S# N - run = () => {// 新线程- j" g4 l7 f: r4 L
- let id = Thread.currentThread().getId();
* n ?, `' g9 h - print("Thread start:" + id);' E# Y6 t$ X" t7 \3 ^+ s Y+ E
- while (state.running) {
5 l0 [2 z1 B2 p% D: L& V7 z - try {
& T% ~" `1 U7 M& m - k += (Date.now() - ti) / 1000 * 0.2; Q: ]7 j" s% k" j+ k4 I7 A3 K
- ti = Date.now();# _0 v: `* ?/ V- {. e; m3 T+ q# F
- if (k > 1.5) {
# f }+ R0 v7 Z - k = 0;( K5 W/ b u# `* t' V4 J
- }5 y7 V* ?$ ?! J0 }
- setComp(g, 1);9 u. H" E3 q% c+ i5 K( h
- da(g);
0 |2 x. m$ r+ v9 H9 t" ?7 q - let kk = smooth(1, k);//平滑切换透明度
' l/ y% Y ?" v - setComp(g, kk);
2 m! m2 K/ C0 `6 N - db(g);" y1 q- d$ m- h9 G( E" n; C! e& v
- t.upload();. Q9 g+ b( r" D; e2 ?8 b
- ctx.setDebugInfo("rt" ,Date.now() - ti);
8 j7 b$ ~2 r3 O - ctx.setDebugInfo("k", k);
3 i$ p0 E: V% C& G' B1 b# o - ctx.setDebugInfo("sm", kk);9 p: @$ f% _8 A' g
- rt = Date.now() - ti;2 J( m6 L3 `' q- @# T2 K
- Thread.sleep(ck(rt - 1000 / fps));
5 `5 R, F- J' | - ctx.setDebugInfo("error", 0)
! o8 V3 h$ e1 D, N" m8 Y8 z1 | - } catch (e) {
- M- H) M8 t( B5 K - ctx.setDebugInfo("error", e);1 W9 ~/ b3 }( s' [2 d
- }
0 g' l$ F; G) h, `* O: L - }
2 }- e# F) a f1 O - print("Thread end:" + id);/ d7 ^, k' V* E' b2 @+ M4 s1 K
- }
0 }0 {0 d2 \0 o2 |" I - let th = new Thread(run, "qiehuan");
+ p# e. `. _1 g0 \5 k - th.start();7 \; I: S( J; p9 a+ b E
- }- D) x+ z% c. N3 j' c: B9 E
- ' @5 ]8 f8 S" P. }6 g
- function render(ctx, state, entity) {
. H4 S3 I& C8 l+ K6 J* F - state.f.tick();
) T; B: j8 z0 ]6 H - }
4 v. [4 X6 T& o; o; l! \! C - P1 ?. E r U
- function dispose(ctx, state, entity) {
9 n& j$ j' |9 J/ F - print("Dispose");: O* p3 ]1 B* u$ r0 l* j+ e4 ]
- state.running = false;
/ X- l) y) ~. S+ a T* o& M+ x - state.f.close();
( @; t, q% Y+ v - }1 ^/ x' A7 B4 V
- 4 i% x. B; y; g7 g" c
- function setComp(g, value) {
5 A8 ]- Y) T O! x; R8 f3 {- s! W" G& L - g.setComposite(AlphaComposite.SrcOver.derive(value));
0 y$ s l; f( d: v8 m2 l - }
复制代码
' S) {. I0 c- p& N% 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。
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; Y2 T7 g; D5 E6 y+ M7 H t顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)6 U4 i2 W! V7 f" c5 B" T6 A% J
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