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7 }/ v" K' ], H( {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。9 z6 j5 q4 N- ?
- importPackage (java.lang);
2 o' F' ^) K$ M; P, C" \! U$ O o! k - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));6 K9 i% Z8 Q. Y- l+ G5 h
2 I; G' M9 e3 ^9 k! n0 K- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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8 ]& G4 q5 x: n( A8 N8 S' o- function getW(str, font) {% A5 }' {- g# a8 a* H) p
- let frc = Resources.getFontRenderContext();( H& w7 ]' Z" _# @! k+ H
- bounds = font.getStringBounds(str, frc);
# U! l4 @# c( E; i7 U+ @$ Z - return Math.ceil(bounds.getWidth());
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- 3 [: ~- p. G- h; S7 }* \
- da = (g) => {//底图绘制5 @; J. \' A5 b, \! H) }
- g.setColor(Color.BLACK); N3 l" M9 A2 v! [9 i) P
- g.fillRect(0, 0, 400, 400);7 l O( }& _3 ?
- }* [& P r7 V- q8 |6 U0 b4 K+ ~/ G
- + q8 y; R" w" ]1 X, o2 w
- db = (g) => {//上层绘制
& A O8 p6 D j' w' I - g.setColor(Color.WHITE);$ }8 [0 a& \% ~, R) b! M6 F
- g.fillRect(0, 0, 400, 400);# s* M6 {. V5 D/ i7 _6 N
- g.setColor(Color.RED);$ ^6 m! |$ }4 r/ M) S* i9 o7 \
- g.setFont(font0);2 V: {5 ]( X; v' i# L7 D
- let str = "晴纱是男娘";0 C0 C) s! H% m0 J3 H
- let ww = 400;' Z0 I1 H' K8 m% u$ @; x
- let w = getW(str, font0);
" z+ a! \" o/ n! _. c: V - g.drawString(str, ww / 2 - w / 2, 200);
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# S m+ m) b5 w$ R& A" z- const mat = new Matrices();
, Q# X# k- n+ U ?: x. X - mat.translate(0, 0.5, 0);
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% H( A4 `: |0 u1 U5 E$ Z% a+ {* s- function create(ctx, state, entity) {1 K6 `3 Y8 E5 T4 v& i6 \& T$ U
- let info = {
. z" Z0 W% w5 b - ctx: ctx,
0 U* Y6 g: C! n+ h7 z; o - isTrain: false,
' Y* ~. x# ]! O7 u9 V - matrices: [mat],
6 q2 H$ E% P/ l& [8 { - texture: [400, 400], q) h" o5 J# \ s8 F
- model: {; z W) G1 ?8 e" `
- renderType: "light",
$ M P+ B. M, h: } - size: [1, 1],
1 H0 @/ l# M& N# g - uvSize: [1, 1]
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- }
+ O0 d7 i" v: V" a F: k - let f = new Face(info);
, W- D3 K7 ?" {- t - state.f = f;
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- let t = f.texture;8 n1 G! N, F8 H$ u9 d4 w
- let g = t.graphics;
1 X" I- g$ d. m; T: ~8 s7 \; D - state.running = true;
# X& u" k7 A' y7 A - let fps = 24;
7 s/ H, o& P8 |# K' b - da(g);//绘制底图/ g; T8 y9 |) k% y& x7 k
- t.upload();
! m' a, _3 d" C) L# @2 @# a; |8 g - let k = 0;3 f( |) W: @* W6 C2 x6 {" a5 K
- let ti = Date.now();: Y+ s& O, C0 J/ p/ R0 S! t7 a
- let rt = 0;
0 x8 A" E9 z- z% u/ { - smooth = (k, v) => {// 平滑变化0 a) P$ p; X E- [8 Q% _1 P0 y% y
- if (v > k) return k;; w" R2 _+ z% m/ i1 Q* |' F
- if (k < 0) return 0;
) A' M# H- ^5 ^6 _ O! y - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
" K8 p3 K! L5 r3 h: O6 o+ ~ - }' i1 f; k1 R5 T
- run = () => {// 新线程- S$ [* ]7 u8 d+ w
- let id = Thread.currentThread().getId();% s5 P0 o+ k* ], z4 w
- print("Thread start:" + id);2 _1 ~6 ?3 N- a G1 O; P' H
- while (state.running) {
* V1 F: G- \% K5 S2 s: {) _ - try {
! Z/ ?0 g1 {' F - k += (Date.now() - ti) / 1000 * 0.2; e$ ~# R1 l8 _. l' U! [
- ti = Date.now();
# W x) A, W! l: A# w1 I - if (k > 1.5) {, `* f8 d4 B" p
- k = 0;
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- setComp(g, 1);& Z2 |% f _! k8 V8 y
- da(g);0 M S1 Q( D: e. W! t
- let kk = smooth(1, k);//平滑切换透明度
) _$ ~% Z5 o" k! m9 K3 v# { - setComp(g, kk);8 E/ W- W- {$ ^* {
- db(g);
2 e8 @% X+ f1 ` - t.upload();8 R9 U/ V% ?2 m- l
- ctx.setDebugInfo("rt" ,Date.now() - ti);
N% Y* G, d/ z f( O+ u - ctx.setDebugInfo("k", k);
5 `5 A2 m7 u& h! Q3 f* `* i0 |$ l- A - ctx.setDebugInfo("sm", kk);% \. U2 F! w+ J
- rt = Date.now() - ti;
# F" ?2 T) g! V4 K u- ~0 j - Thread.sleep(ck(rt - 1000 / fps));2 `+ C: k1 c$ P( a( s
- ctx.setDebugInfo("error", 0)
! H8 ?: g I* i( w' L: b5 e, l - } catch (e) {
6 J! w2 U& |- [* C2 S. T - ctx.setDebugInfo("error", e);2 q) Q5 O! Z; w$ q
- }
- }. D8 B' I1 U) W/ r - }
7 |7 c. {4 |9 L) a! v& S - print("Thread end:" + id);
% Z4 {9 A# k8 d- b3 Q8 j - }
; U9 H; W/ s: }( c4 `3 I7 } ? - let th = new Thread(run, "qiehuan");
3 A4 J/ I& c7 H" F: t; C; m - th.start();
: L% H U0 A$ T9 K - }7 V- k! ]) B4 Q! ^$ W6 l
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- function render(ctx, state, entity) {
% a+ H; v: c P8 i& H1 |. E - state.f.tick();
" g, E) [$ i$ J# z4 q8 p& [ - }
( V2 I- O+ v @6 N# v* m
$ ]+ {# j& {' {5 z. @- function dispose(ctx, state, entity) {
. |5 C9 o% J$ y( k/ a* L - print("Dispose");
' N% r4 Y% i. x+ ~! m: H - state.running = false;
6 ?' o) l) B2 D+ @' N6 ? - state.f.close();
( F+ W$ R8 {0 l1 H- D7 \ - }
( v' U7 |5 _' M5 W
* j1 j* Q& i: N3 G; o- function setComp(g, value) {
( [6 Z' L2 o1 a/ o: m% z - g.setComposite(AlphaComposite.SrcOver.derive(value));8 X4 R- s: ]& a i7 s* B7 w
- }
复制代码 # a; w: w6 f) 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)( B h j9 G. A. v5 D+ k* a4 a" L
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