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: r/ j. v( `, I# i3 p6 c# a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。7 |- R1 O; e& `
- importPackage (java.lang);
" V; u9 ?* o" k - importPackage (java.awt);
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2 T% A( o1 c( Z! \- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 {& T0 p$ k2 C/ a& F
' B* y) z( b4 J4 j- function getW(str, font) {* Z- ]# Q F$ b: V
- let frc = Resources.getFontRenderContext();
/ q7 ?# e* o5 l5 }. D$ w - bounds = font.getStringBounds(str, frc);( M* V* p x+ ]4 k* m9 X; w
- return Math.ceil(bounds.getWidth());
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$ Z3 m( S2 c$ D) H/ u: b- da = (g) => {//底图绘制7 m' R5 ~ h2 j I! ?1 N8 S6 o
- g.setColor(Color.BLACK);
/ e* i/ c- e8 n- j8 t+ P - g.fillRect(0, 0, 400, 400);$ r8 s2 m% ]$ E3 T# N# h- U
- }
2 ~) ~: \; R+ d' r# _* r% o - % Q) c5 A# v) S' E5 b
- db = (g) => {//上层绘制3 ]9 v% y* C: |* @2 X" }: h
- g.setColor(Color.WHITE);: w' H6 c0 `% U. o, H0 w) K
- g.fillRect(0, 0, 400, 400);
/ _: `0 c7 L* @- q- u0 n - g.setColor(Color.RED);) ^5 l" z/ h6 @, S# x0 r$ e
- g.setFont(font0);
- V0 M6 M1 N/ D3 e3 ]/ e' T: { - let str = "晴纱是男娘";' b/ h# |/ u, p' q" Z
- let ww = 400;& X& [% T) \1 D6 z
- let w = getW(str, font0);/ a$ \5 u. H' H+ x1 F' P$ c. {( o
- g.drawString(str, ww / 2 - w / 2, 200);8 i8 | J8 \4 b5 w3 o* t, l N8 x+ n
- }
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; O' ^9 z5 A8 t' [- const mat = new Matrices();
# c9 y/ u _# g# I$ r! e' V - mat.translate(0, 0.5, 0);
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* j# D4 @) ] s9 p* _- function create(ctx, state, entity) {/ @6 P: j" C9 F
- let info = {
1 n0 p* Q. D& m8 ?2 C# ~. S - ctx: ctx,
- E/ x, _" a7 X8 S/ D" Z# \ - isTrain: false,8 q* L$ \: u5 y7 g) p1 u" W
- matrices: [mat],
$ K4 X- p! m! I D( O r \ - texture: [400, 400],
: n! N8 t7 Y* ~8 E' n; T - model: {- k7 M1 U+ v; `5 [8 X4 l# o8 m/ A: ~
- renderType: "light",9 v; l! o5 T, v0 f+ y" b3 r7 ]
- size: [1, 1],) {+ Q1 l" m% m4 ?: L% U% ^
- uvSize: [1, 1]
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- let f = new Face(info);
, E5 v y( L" c% w - state.f = f;2 _# o7 Q' ?4 ?# ~
/ y8 e& J2 t _! z- let t = f.texture;( g& R5 F$ W7 u# v- ]. y1 m* J+ B
- let g = t.graphics;/ [ }3 V/ z* t) ]6 `
- state.running = true;
9 J+ k' v8 Y0 }5 P4 [# } - let fps = 24;0 w/ ~6 |6 L9 K6 N
- da(g);//绘制底图3 J; s: w- b4 E% Q y- [
- t.upload();
3 ^* c0 M3 h( r, ^: ^9 u" A4 \ - let k = 0;
: Q/ K+ p9 f3 s# G" E4 b! } - let ti = Date.now();
6 i" }, p- y; e' |( F - let rt = 0;2 }" ]% ~" ?9 h) J# A5 l
- smooth = (k, v) => {// 平滑变化
% @( D* ?( w4 G, S, a0 j- F - if (v > k) return k;; M: W8 m5 k* C4 s5 y+ B) A T
- if (k < 0) return 0;
P2 V. p5 Q8 ~4 U& f) m - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程* z$ J3 W# ~1 Q1 m6 f7 @/ M9 A
- let id = Thread.currentThread().getId();
8 }8 c1 r/ t" ]8 Z, C7 ~ - print("Thread start:" + id);
% y6 ?& _2 L! m: ^) t( ] - while (state.running) {( `" a- p) [1 H' s2 K8 A4 k" B# B
- try {
: K$ t( B4 y/ R. ^# J; b! r! m - k += (Date.now() - ti) / 1000 * 0.2;8 f; t+ w! f, B
- ti = Date.now();
' d. R. Q* x; W. u5 @. e# i - if (k > 1.5) {: b# c+ f. r6 |3 w5 W
- k = 0;
* V; I4 @3 d2 q1 Z - }7 g, w. ]. J1 J7 \2 d( V
- setComp(g, 1);. ^6 |( ~" a' U1 t
- da(g);% j3 x% z+ u: |1 U+ u
- let kk = smooth(1, k);//平滑切换透明度' ^0 z/ S0 Y$ n) Z
- setComp(g, kk);
, A# [' L! V4 x( J7 x: E - db(g);
1 s2 ?; Z W" \! `9 c1 h$ F - t.upload();% v" l. [$ l2 `. W& [8 N S2 f
- ctx.setDebugInfo("rt" ,Date.now() - ti);$ W M' S6 d! R5 X8 p
- ctx.setDebugInfo("k", k);
9 _( W! {' J" o - ctx.setDebugInfo("sm", kk);- M: {) \' S. r e: g
- rt = Date.now() - ti;. ^. }8 X8 M- E
- Thread.sleep(ck(rt - 1000 / fps));# y: K& }+ ^* b4 u( s7 U8 S6 D
- ctx.setDebugInfo("error", 0)
( r1 o8 a$ F9 Z/ ~$ E - } catch (e) {+ p+ [6 V. B0 |# x+ e( k
- ctx.setDebugInfo("error", e);% H* Q" D- v+ A4 Z4 R/ t
- }) E7 x/ Q; Q. H; U/ x
- }
) J! D: L" {6 J$ ~, T. D - print("Thread end:" + id);6 V' `* Y- Y- {" y( h/ C9 l: X2 {
- }- Y6 [5 P1 N7 C. }
- let th = new Thread(run, "qiehuan");5 K: a* G1 _$ x! H# D' h0 U1 Z
- th.start();/ Y! D& s8 I% Y2 n1 z1 M( k
- }, m# I5 |0 ?& q
9 g" C$ x* ], t _7 a2 k; G2 e- function render(ctx, state, entity) {- m# o+ g$ x3 @9 x6 b/ q; D" h
- state.f.tick();- {% ?) {9 O7 _* a6 S
- }
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- function dispose(ctx, state, entity) {/ t1 \1 W: Y, c& a# s
- print("Dispose");
J/ I R* z7 u - state.running = false;
% {) E6 T% K' w1 T - state.f.close();
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- - x4 l7 D! W* x+ @! O
- function setComp(g, value) {& q i0 k3 M7 S$ `/ n' L
- g.setComposite(AlphaComposite.SrcOver.derive(value));
1 ~6 v/ C0 @; W- v - }
复制代码
1 p3 i4 C8 _7 Z; s) n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)7 }- `" g3 X. @' j
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