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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。0 a2 a4 ]& q* h: J+ f
- importPackage (java.lang);
$ C' \! a% S& B' E7 I" D0 T% i - importPackage (java.awt);
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, N2 j. C/ c1 X- V0 P4 U) C- include(Resources.id("mtrsteamloco:library/code/face.js"));/ T. f: T, ]- M' \. C4 l5 Y- i: N: o
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
; I8 P! L. ^8 y6 P - let frc = Resources.getFontRenderContext();* r% Q3 O) R9 S
- bounds = font.getStringBounds(str, frc);( m6 t0 G! x; c4 d
- return Math.ceil(bounds.getWidth());
. Y( S4 Q I+ J5 K' J0 `% r - }
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1 _" b0 p- A3 z9 w7 v( B- da = (g) => {//底图绘制( r# B1 t( d# r: q! v( s$ ?+ p g/ s& ]
- g.setColor(Color.BLACK);
+ l4 A4 F! R- v( b! z: Z - g.fillRect(0, 0, 400, 400);
. j ]: ]& L) m) W - }
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5 r% w3 Y1 d1 x+ v# g- db = (g) => {//上层绘制; h$ T( ?( L/ P
- g.setColor(Color.WHITE);# `8 C0 ^5 j; I6 o& s- V+ c
- g.fillRect(0, 0, 400, 400);
( M( E. @& _! ]6 N8 ]2 G7 X - g.setColor(Color.RED);
: N& o, [. d/ u, D; e8 y - g.setFont(font0);5 W& n$ X; e3 } N; m
- let str = "晴纱是男娘";" U; p' }" m- E/ z$ u- X
- let ww = 400;
5 m4 z" c8 N l - let w = getW(str, font0);
0 z/ `8 d9 V6 E O - g.drawString(str, ww / 2 - w / 2, 200);& R6 S0 R* u) i! S5 `# K, A+ R
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: [! E. ^7 ~% Q- const mat = new Matrices();
W+ Y* \# X/ e6 n - mat.translate(0, 0.5, 0);% Y, x! H5 N# I9 Z+ h# T
) K8 [5 z+ W9 |. k4 B- function create(ctx, state, entity) {5 v0 c% s6 \- ]+ k+ J2 M
- let info = {8 R( A0 B8 d8 a2 |: q `
- ctx: ctx,
3 b8 s- \, j f - isTrain: false,
6 e5 o6 {+ V: c( ]) J/ z - matrices: [mat],
2 P; j9 e0 z' o& S" V7 K* ] - texture: [400, 400],
& t+ V+ c+ }7 V. I5 o/ H - model: {2 G- ^1 [' J0 v v/ J3 O
- renderType: "light",4 w* X- Z ^' U6 |7 K! \( I) I# ?
- size: [1, 1],
$ c [$ s1 g* K; p+ X7 A - uvSize: [1, 1]; r/ X3 E" M) y9 o
- }
' r8 f+ G2 Z5 O( Z" j$ n* o - }
" p# ^" t; x5 _ s, U' v+ ~8 d# f - let f = new Face(info);
; V' L: S2 u) H) e6 y, k% d* |- c, [ - state.f = f;
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" f6 l" ^# ~& s1 ?+ B; F: N; d! I- let t = f.texture;
5 w! j: F5 @3 ]5 e, [ - let g = t.graphics;+ ?/ ^$ T0 A- G+ W8 C
- state.running = true;
" W& A* B5 h. D$ b - let fps = 24;! d! Z0 @5 [6 P4 S: S
- da(g);//绘制底图
5 @! }. {, ~( z: \- E4 c - t.upload();1 [# `/ y! n% O* T q
- let k = 0;
! W7 f: c- H+ J - let ti = Date.now();
& s! V3 r( }: H6 L6 d - let rt = 0;
3 u4 F) V2 H2 I; L+ S, { - smooth = (k, v) => {// 平滑变化
8 c& Q9 i+ n( p, d8 Z( y- I; i - if (v > k) return k;
4 W3 n+ w% y9 U/ t9 `6 H6 v - if (k < 0) return 0;
1 I$ M5 |( j! s - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;4 ^, r* r. _% d* X8 @1 x! E* C; u3 @
- }2 m8 ^- u- s8 O) u
- run = () => {// 新线程) w4 U. T7 ?& Y( i2 l' r
- let id = Thread.currentThread().getId();' o3 l* \* x8 U* b" g) _/ ?4 j' h
- print("Thread start:" + id);7 ~5 }* J5 B, s% a! W( U/ W- \4 }
- while (state.running) {. ?2 i5 Q. F ^: l5 i
- try {
% {* I7 ?) h- a9 N3 g - k += (Date.now() - ti) / 1000 * 0.2;& p. M8 O, `5 C! h/ Y- C- b
- ti = Date.now();* x, |/ w! c* a/ z- f, L
- if (k > 1.5) {# M1 G% ~8 s! X4 f4 ]! T' J
- k = 0;
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- setComp(g, 1);
! {2 Y. p& F+ Z9 V5 y" m - da(g);8 g; B4 c! N* T9 K
- let kk = smooth(1, k);//平滑切换透明度
$ O/ e5 y* M& d" b+ i! z; G - setComp(g, kk);
0 L, y+ U2 z5 F) u8 i8 ^3 b) a1 }) F+ N& w - db(g);! U5 `8 ]5 [, V( K
- t.upload();
. D# z- o# J, T4 O G - ctx.setDebugInfo("rt" ,Date.now() - ti);8 }. _- N! u/ h. z" R
- ctx.setDebugInfo("k", k);
6 w4 q* @: }7 q7 i$ r - ctx.setDebugInfo("sm", kk);
# B8 L& p, e$ p/ D) r3 U% h% Y5 `& W - rt = Date.now() - ti;
0 E6 b8 X5 z9 Q+ A' r% o+ P6 j( \ - Thread.sleep(ck(rt - 1000 / fps));
* ]3 T8 ?8 M% d8 h" y& k. g8 V - ctx.setDebugInfo("error", 0)# i S% _9 N6 o, W! _: K7 \) y/ _
- } catch (e) {
3 e0 y7 O1 _" T+ r - ctx.setDebugInfo("error", e);
2 w! p3 ~+ r4 j0 f - }
G. `8 F4 O X& s, w/ q' b: m4 v/ P6 A! B - }
+ ]# c; j. f/ A3 v( W) ~ Q7 ^ - print("Thread end:" + id);
, Y, z2 w; p, \! U! m1 _ - }
/ z9 q; _4 ? v: q. H9 {% t6 q8 q) C - let th = new Thread(run, "qiehuan");
7 i+ m. u. k% D$ {" _9 Z4 i - th.start();, H \$ R+ C& z5 Q( Z: b* f9 }% v
- }
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; f! e$ l# f0 } g- function render(ctx, state, entity) {
~2 Z" F! v/ M* z - state.f.tick();. k5 |" e/ e; _
- }
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* n" r2 [3 _3 D* I$ i- function dispose(ctx, state, entity) {( ^3 r, _/ h: s; W& w
- print("Dispose");
4 Q( T! @( J6 W: F3 L - state.running = false;- x. Q9 i; n2 _9 {* x0 P v
- state.f.close();4 f/ D. } S- H9 w& d2 s
- }
+ y, t3 c: }7 v8 T
9 ?2 i! e0 C8 U. D" a- function setComp(g, value) {* y6 V( V* c5 ]3 T
- g.setComposite(AlphaComposite.SrcOver.derive(value));/ k6 N* P8 `7 K- ?$ N; E5 L
- }
复制代码 / m! u' _5 ?# ^
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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