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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。& u7 F V/ h0 L7 O, y
- importPackage (java.lang);
$ b/ `5 q- P% t+ `, K0 [, J+ j - importPackage (java.awt);3 Q4 t4 K" z! N+ g v6 x
* M$ ~: U9 ?& V6 E+ ^) S4 A$ u- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( \0 U4 K/ f6 B8 n
- 9 m! `6 [+ ]1 B' c% B3 }
- function getW(str, font) {$ J! Z$ f; ?# o. A4 K4 F* S1 z
- let frc = Resources.getFontRenderContext();
. I9 O; S9 ~# n8 s( N - bounds = font.getStringBounds(str, frc);
" }' l: [5 ?% e# h6 m9 q - return Math.ceil(bounds.getWidth());# P8 H9 Q; x5 |" f
- }/ D* R$ b; F4 E- \! z& _
- % E- q% i! j+ \* m
- da = (g) => {//底图绘制 @2 K3 V. e6 K4 w. \0 D
- g.setColor(Color.BLACK);
. R; a- }) F, J: u, @ - g.fillRect(0, 0, 400, 400);
3 k/ z; L$ A p1 F0 k( S3 Q; H - }
" h P/ _* e6 l& m2 H( k, J - V" I+ Y! j/ B2 ]
- db = (g) => {//上层绘制 b: q% n0 g% [ Q/ ]. D+ N$ e6 J
- g.setColor(Color.WHITE);5 [1 e' M5 d* u8 u5 `$ o( O* V% e
- g.fillRect(0, 0, 400, 400);4 t* [! f6 p- B# G- L* j
- g.setColor(Color.RED);/ J2 \3 J& Y. k8 P8 l" S
- g.setFont(font0);. W/ ^: _! y! J) E+ |
- let str = "晴纱是男娘";0 L9 ^$ y# p1 Z7 L6 i5 u
- let ww = 400;. _; J1 ^" b3 ]9 G
- let w = getW(str, font0);, @5 m: z2 F. `* O' q5 `# i
- g.drawString(str, ww / 2 - w / 2, 200);
3 p4 c" n& S( |2 @' B1 v% c0 ] - }9 p4 M) U: ~ t/ e6 u/ Y. A
/ [7 Q! j' }8 [7 A- const mat = new Matrices();
% S( r& w( Q) _0 ] - mat.translate(0, 0.5, 0); n p' \ } [+ s
- " h% w3 G6 X% N- r( {
- function create(ctx, state, entity) {
7 U; p+ v# |7 ^, H- M0 s6 s8 n1 W1 C - let info = {
- Q/ @9 n: w I2 ?, k; k - ctx: ctx,
8 l5 {" O) {* C - isTrain: false,
+ h0 D& z; f3 j! N - matrices: [mat],
4 w5 j* D2 b; E% H! ~; c/ e - texture: [400, 400],
# U* k% X! @0 a% U - model: { O& K9 Z+ @) Q
- renderType: "light",3 k; `6 J \, v( p$ r0 U c8 }. k
- size: [1, 1]," |/ ?! d. N2 D' S. I$ ~/ a5 b
- uvSize: [1, 1]8 }. {" ~% z: w2 ]$ N
- }4 j; H( Z8 M& k, A) M' Q. q# ?
- }
6 b( N- `" V9 A. S! P - let f = new Face(info);
Y( L4 N% G( K; p+ { - state.f = f;" J3 S3 x4 H3 x w$ \7 {
u, x1 G2 j# h& E/ f9 y' h- let t = f.texture;/ U$ U: }$ y0 g/ H6 ?& ^& [
- let g = t.graphics;
* O# N& X2 f# {+ A Y - state.running = true; C+ j" N$ o4 F7 u1 u
- let fps = 24;; U2 \! ]9 E9 h' K' ?
- da(g);//绘制底图
6 {* r/ K8 r: ?" c4 ]4 h: Y - t.upload();+ `6 t; ?1 v3 }4 R0 w
- let k = 0;
# {+ q% Y: U6 m+ ]& `" F - let ti = Date.now();6 ?% X9 X# W# ?# S1 [
- let rt = 0;9 N `9 t9 b' }/ W4 Z
- smooth = (k, v) => {// 平滑变化9 k) n9 l5 u# n8 x
- if (v > k) return k;0 G) M$ p: o4 @/ `- b* j* B f
- if (k < 0) return 0;
! y- D1 ]) t! d. t8 J. ^% t - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! p9 ]: e2 W- M - }# Q! ]/ V9 z$ r U4 `# a5 K+ L; j
- run = () => {// 新线程
, [! O% n4 p; t# y) ^ - let id = Thread.currentThread().getId();6 d/ A1 }* y7 z% R; u7 d3 @
- print("Thread start:" + id);- P! M, D# n% `( f6 N# J
- while (state.running) {2 S% R9 g' n; S9 l
- try {0 j- K) V! r+ ~9 S2 P
- k += (Date.now() - ti) / 1000 * 0.2;
1 f4 F+ j& Y4 ~! E, B* _4 N - ti = Date.now();
: n9 `4 W9 ^1 X3 e$ v' L: u - if (k > 1.5) {
! `- F- n5 Y3 R& L6 E( Q1 o5 p - k = 0;
7 h W. z$ }8 |4 n, V/ N - }
3 P. j- g& U# j" O8 j - setComp(g, 1);
. c4 Y% i# r" q6 e3 W0 t8 p - da(g);0 M$ Y0 _0 Y0 E8 w( d) F
- let kk = smooth(1, k);//平滑切换透明度
/ b7 V+ a0 I. t# ^: ^+ J u* [3 z - setComp(g, kk); [6 _1 C# G* _( {9 N" ~: K
- db(g);2 X$ n# d: \- T
- t.upload();
* K. w0 y& |9 r \- y& Y8 F - ctx.setDebugInfo("rt" ,Date.now() - ti);0 w8 J+ w5 Y. I5 m
- ctx.setDebugInfo("k", k);3 \0 j, \9 m! D$ d5 S3 u; D- t1 a
- ctx.setDebugInfo("sm", kk);
& S* E J% Z( A; d- k n+ [ - rt = Date.now() - ti;2 p5 w" l' x9 Y4 F
- Thread.sleep(ck(rt - 1000 / fps));" ^6 q1 A. U8 w1 W
- ctx.setDebugInfo("error", 0)
& q Q7 N' r- w7 X( \, q - } catch (e) {, w+ i3 m* r0 ]
- ctx.setDebugInfo("error", e);
6 Z& e3 R. Q- K: V4 B$ B7 r# y. E - }
- j i# f# O/ T% U" E - }5 G9 P' ^0 o( |6 {/ P8 I% F3 q
- print("Thread end:" + id);
\8 D) b9 g( ^$ x - }
$ [% @( c" l9 D, u2 w! K% `5 { - let th = new Thread(run, "qiehuan");
5 a( Y0 t7 Q1 [4 A. a% A, P - th.start();$ O9 W% h( [) U& s. r
- }* `8 L |( a9 M$ {1 e
0 ^5 _' I7 @7 o( z" E" n$ G- function render(ctx, state, entity) {
+ Z# z2 l9 o0 v- P& \ - state.f.tick();8 i$ Y' o. V+ t4 I
- }5 d& q0 k+ V; h/ s7 [( X) ?5 K
- ( S0 _* S/ B- ]+ B6 ~4 b6 [
- function dispose(ctx, state, entity) {
5 H1 J$ H9 }+ {. ?& H - print("Dispose"); p5 o: K, }( C1 k$ S
- state.running = false;" J: s' ~1 f2 s
- state.f.close();) q+ K, @* c* [' e. V+ D t; C& ]
- }
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, r# c1 R7 v; M, r" [- r' r% |4 o9 T) {3 H- function setComp(g, value) {/ n: c+ B0 h& `9 `( d+ ^5 [
- g.setComposite(AlphaComposite.SrcOver.derive(value));# {) h" g3 K" {% ~; l. B" D" v
- }
复制代码 6 n3 D' v1 d' c- B: V
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。& y! ~" ~1 B, T) ^0 n- b7 f+ m
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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)8 L, `4 m" J& X! Z& L, p$ R& e
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