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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。$ d2 M% r" G j) m; X- u! X
- importPackage (java.lang);
1 {. E, P1 s6 }% j/ `# f$ i - importPackage (java.awt);" |: c8 T3 V! g% l2 |8 e+ ]
' w2 Q; M( N- [7 o2 M3 W3 z- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);0 q P: u; R/ F# f' F5 P
# L& {: [- u& b. s- function getW(str, font) {
! S5 M2 D. y( D3 {( V- o - let frc = Resources.getFontRenderContext();
U+ D) e L7 Z# N - bounds = font.getStringBounds(str, frc);
. i/ f* h5 z2 R; ]& h& i1 k1 `( O - return Math.ceil(bounds.getWidth());0 B! G1 e g8 v6 k- U
- }
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- da = (g) => {//底图绘制7 ^5 ^0 z( U5 [6 |4 \
- g.setColor(Color.BLACK);: r$ L& z0 H% c, W- G! ]
- g.fillRect(0, 0, 400, 400);
0 f9 M7 k# A+ V" n: Y# t3 ] W - }
. A* V# T' i; ]0 l' I/ P8 n
4 n( M6 A/ E# T1 _! j- db = (g) => {//上层绘制$ |, [( O7 R# n- |1 S: L8 g
- g.setColor(Color.WHITE);2 D8 _) f4 W) d+ @; t: L
- g.fillRect(0, 0, 400, 400);
! ?# Z2 i7 E) @4 @/ c - g.setColor(Color.RED);
9 d( w9 S; C8 x% R% p. d; @ - g.setFont(font0);
) h0 N$ Z5 I4 A" A, y. R - let str = "晴纱是男娘";
0 o1 O. |% R' |1 M; m - let ww = 400;* S/ \ V; X/ u! }
- let w = getW(str, font0);. D2 U0 Z; }" n+ W7 B8 Y; [6 \- i
- g.drawString(str, ww / 2 - w / 2, 200);
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- : j; G) ^, U/ m( ?- c" W1 u
- const mat = new Matrices();
$ X% S6 v( v+ m7 Z - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {& w+ {* f& S: h0 D1 ?
- let info = {5 ?7 |# d& \0 |1 d
- ctx: ctx,
* ^( F4 A1 Z" l2 z, t! Z- N - isTrain: false,
0 R: m7 U# E5 u$ e* Y5 t; [ - matrices: [mat],2 z! k6 u1 H. f0 Z0 |
- texture: [400, 400],- Y7 N; {. T& N& H, Y! x( i1 c' G
- model: {6 @4 k( S4 L/ I' j5 I- P* s" S
- renderType: "light",
% s+ c# r) r7 c* {4 D6 g2 j; b, { - size: [1, 1],! ~- t% K1 {( V0 `3 e
- uvSize: [1, 1]
; s2 [- U6 K2 m; b, n K - }& C" s. c3 J5 l8 |" H0 Z
- }
, h6 \5 q9 X3 Z" M9 g - let f = new Face(info);0 d, a4 p0 g1 k) H
- state.f = f;; q6 U8 w3 Y0 R3 n* z
- 7 v9 n; M0 k% X' C8 M% a% C
- let t = f.texture;
0 G9 T% W7 B) L2 M( } - let g = t.graphics;
4 }, m/ }* U+ S; C2 E1 I - state.running = true;8 ?7 ?$ W: p( k, z) h4 \
- let fps = 24; t( u7 Z$ B/ r% x) G
- da(g);//绘制底图
0 y+ F5 V# X( k - t.upload();. R9 G5 c3 N; x. V8 x, J" o
- let k = 0;7 T. n) H# O/ w m
- let ti = Date.now();
9 p! B, q& X, m& z4 U' ^" y - let rt = 0;
( E6 D( Y9 q8 d9 K - smooth = (k, v) => {// 平滑变化
& H1 }7 ]5 s; F# M& R - if (v > k) return k;
* r' @+ j/ v. S5 C, P - if (k < 0) return 0;
3 d- E: b7 y# w2 n5 Q2 k - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
# Y6 P; K+ n' ]4 ?( R0 L4 e! O1 _7 l9 y - }
6 k) L! w4 v3 n - run = () => {// 新线程
3 p* p. ~5 B2 k! L - let id = Thread.currentThread().getId();
9 S4 I( L Y+ s U7 L - print("Thread start:" + id);
4 @: B W5 D" P: y4 {: g( J% f - while (state.running) {
$ E; P" M0 O# K7 S- W - try {
2 S1 w6 {2 V7 E( N0 M- S0 R/ t3 R( l# x - k += (Date.now() - ti) / 1000 * 0.2;2 J5 F/ q B5 U% R' f, i9 L# V
- ti = Date.now();/ l" _* m9 [7 O& h. X
- if (k > 1.5) {9 G: [2 m: V& n/ v3 E. a& R1 B
- k = 0;0 Q. {8 A+ |- m5 i8 J- ^; B
- }* L2 [# |. i( k% }" a+ H( L) h
- setComp(g, 1);
$ a8 L+ f/ S% B7 R* }, G+ V# p - da(g);
$ h' F1 I- G( n' g) G6 b5 H5 e - let kk = smooth(1, k);//平滑切换透明度 }1 `9 E5 _: J
- setComp(g, kk);0 ^) R9 b$ j6 }+ H
- db(g);' |1 y9 Q4 h* B8 w* L# g6 O: J6 b
- t.upload();2 z4 p* X9 n$ V+ p' ~" l
- ctx.setDebugInfo("rt" ,Date.now() - ti);# n* t6 g9 \; C @& U
- ctx.setDebugInfo("k", k);
5 [- W6 W5 V/ W. B/ P3 I - ctx.setDebugInfo("sm", kk);
6 v3 J: `0 f0 u$ c4 d& K - rt = Date.now() - ti;
! z# r2 C+ ]5 p9 b/ F/ L - Thread.sleep(ck(rt - 1000 / fps));8 V' a3 q' }) s% G4 A. U
- ctx.setDebugInfo("error", 0)0 ]' }3 ]/ Y1 j$ N6 q+ ?
- } catch (e) {: {" [. e$ c: Q4 L! x
- ctx.setDebugInfo("error", e);
9 T+ b' `3 I* K- j/ Q% r( D! V4 k - }* P7 M8 m0 g. m2 g. r# c
- }
x! t4 P& d; V1 k& i7 m - print("Thread end:" + id);; y1 x7 s7 C/ ^
- }2 m' M3 U/ c: i7 M" r+ t8 F
- let th = new Thread(run, "qiehuan");
( c9 A- h' p- R; ? - th.start();
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- ' h9 U! P7 J$ J1 Y2 i7 e
- function render(ctx, state, entity) {
; W) A$ A. Y# [2 n& }; {- ]% i - state.f.tick();
9 ^, }8 ~* i- W( v4 Y! A* l1 _5 { - }
- k s( I+ H9 z9 `4 M. D - $ l: a* G- }* b* G
- function dispose(ctx, state, entity) {
: _9 ~5 \/ `/ A. O, Y( \4 g# w( K' ~- e - print("Dispose");: I# J5 r6 g& E) p0 x, I5 W6 j
- state.running = false;% a' v7 _3 B; c' G' o7 M
- state.f.close();2 n0 K8 [9 ]" ^
- }
- O4 D, s& t, r/ t
4 ~4 d- q1 i! T- function setComp(g, value) {
# p. o5 T0 b' `$ x( M3 O s - g.setComposite(AlphaComposite.SrcOver.derive(value));
5 F d, y# Y0 v" n: S - }
复制代码
2 N! q8 ?. ~* s9 s2 F% d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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0 D) \, E: l3 z D8 g" m4 \顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)5 A$ ^; n/ i; b$ p
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