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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。" o! A4 n0 }7 _
- importPackage (java.lang);
2 ^) o8 [- T9 V* ^ - importPackage (java.awt);! ^8 D5 B) C. O6 d
- / Y$ [" _' I0 i3 G: o9 O, ~
- include(Resources.id("mtrsteamloco:library/code/face.js"));
5 L" |$ i. H4 [5 I0 @; u8 } - % K8 H o" t7 h- D- F
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);4 Q+ x: V4 D% \3 x1 Y* ~
4 ]( V, p* a, F- function getW(str, font) {
- @$ z+ T! N | T* { - let frc = Resources.getFontRenderContext();9 W9 V3 T1 M& o8 ]& |; |
- bounds = font.getStringBounds(str, frc);4 j: |# z1 }4 j9 C
- return Math.ceil(bounds.getWidth());
# |: M3 Z+ k0 d& `. k' Y - }& G# D; w% E' K
8 O" v' ^$ P, c$ E, {- da = (g) => {//底图绘制
, h! _% d% A0 P( b6 M' D9 a - g.setColor(Color.BLACK);
5 Z- @. @" G j: {0 k0 j - g.fillRect(0, 0, 400, 400);; A2 f# }* s9 h
- }
$ P1 _5 e0 Y: r+ i' `# T
2 \- C; Y7 `" b- v3 P5 m- db = (g) => {//上层绘制7 P. j" u& q! @9 `
- g.setColor(Color.WHITE);
$ n, y3 I! k+ N- X; @( h - g.fillRect(0, 0, 400, 400);
* ~' a# R i* O& z$ \) { - g.setColor(Color.RED);& R4 L( y" N; l& e7 k: O
- g.setFont(font0);
& W- Y5 a% H9 e) @5 N - let str = "晴纱是男娘"; x) p! W1 i% {6 A2 ?
- let ww = 400;
8 z, h3 v# |- d8 o& S - let w = getW(str, font0);
3 T( Z/ y. K: ]/ A& P - g.drawString(str, ww / 2 - w / 2, 200);
6 d) v: E/ z& ^: |" G - }
0 ]0 A) z5 \+ ^, r
: q$ R" U9 R* @) \) D- const mat = new Matrices();
+ J2 Z0 X6 @( b. N, y% M - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
" |% A; H& j7 y - let info = {& X6 g2 v3 g2 ^' L0 {9 Q+ z
- ctx: ctx,
* v l) i* x4 ~* | - isTrain: false,. {0 S: i. \, n' f) `0 s# |
- matrices: [mat],
5 I$ T c* P7 f - texture: [400, 400],; M. Y; M; c" h) ?+ E# n. S
- model: {
: x. ?2 Q- F j9 n - renderType: "light",
5 Y% L1 {* c0 ~ - size: [1, 1],
9 e/ j3 @4 G1 ^- C+ m% W - uvSize: [1, 1]$ y5 Z n0 u) i
- }
4 I/ x! e6 w4 J% c, r+ T - }
$ _4 v1 t/ Y) j) l1 z - let f = new Face(info);8 P* ?" m4 T. |, ^1 }
- state.f = f;
: l2 _3 Z+ j y, | - % i# B; D' Z% U: g. [& v. \
- let t = f.texture;, e L" ~+ N' I4 i: w
- let g = t.graphics;
6 Y. _. t b E6 s5 B3 Y2 C - state.running = true;2 g- l+ b- V" k( a/ C
- let fps = 24;& }' A! X7 v7 x0 ^5 j
- da(g);//绘制底图
2 L: t) ^- D. j9 _( b - t.upload();
: P7 g7 `) j& Y' p2 T - let k = 0;0 [/ ?& D3 a4 T$ J! ~
- let ti = Date.now();9 h, W) J/ e3 \1 G
- let rt = 0;, b% C+ \1 m0 Y W8 y; M
- smooth = (k, v) => {// 平滑变化& X% g5 |3 u' U9 P( _. }6 N
- if (v > k) return k;
3 ^5 i# ?) U! p - if (k < 0) return 0;
+ Q3 ^' s) J5 S$ e. y. d$ z - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;. Q& S/ k, _0 O1 _; A! d
- }
% S8 f& `" `. c/ a+ c, {8 I - run = () => {// 新线程
: N7 B4 k) R/ z9 y$ N - let id = Thread.currentThread().getId();
9 F! V$ L. [1 g! Y$ i - print("Thread start:" + id);8 s5 F8 [9 u o- `" N
- while (state.running) {' w# j" h. f+ S' x1 p2 F& h
- try {
. y5 O. Q# p7 T2 g( ^+ ?+ y/ f; J - k += (Date.now() - ti) / 1000 * 0.2;1 O& K' Z$ [6 R7 f
- ti = Date.now();2 _+ t8 e& @7 F% l& k
- if (k > 1.5) {
) x6 ~' r- C K - k = 0;9 l! X. j( i/ q2 ]
- }
, C5 M8 M# X9 }& L$ D. f' K - setComp(g, 1);. z' p& {: Z$ V$ p3 v, k) x
- da(g);
( C. S& g$ z6 x) K$ k/ L4 ?9 s/ B- M - let kk = smooth(1, k);//平滑切换透明度
( r* k1 \$ L& ~& b. ? F. a( x - setComp(g, kk);; x- ~7 d# ]5 G x# H9 J( d- `
- db(g);1 w8 B3 E# b; \' V; ~& F4 J
- t.upload();# J! Q) ~& ~% ^" l4 P E
- ctx.setDebugInfo("rt" ,Date.now() - ti);
3 M0 Z" R! g2 |3 ]1 M$ x( } - ctx.setDebugInfo("k", k);$ _/ d3 G; U% l- }
- ctx.setDebugInfo("sm", kk);
9 t3 f+ i; \ A$ \+ _+ c* ^" ]4 ` \6 Y - rt = Date.now() - ti;
2 o2 P, W0 S. o) } - Thread.sleep(ck(rt - 1000 / fps));- p/ v* Q" Z$ V" [' \
- ctx.setDebugInfo("error", 0)
3 I1 s' j7 N) i1 }: H# ~ - } catch (e) {5 \1 T+ [( @4 A% z' m8 R" ]% Z
- ctx.setDebugInfo("error", e);
9 a) r- u& M2 z8 U - }4 K3 E6 k/ Y1 W. |# ^
- }
" F/ K- P* v1 _ - print("Thread end:" + id);- Q, E: l1 M. J# E. g
- }+ C3 M* @" T0 n4 y6 d( b! [3 O' }
- let th = new Thread(run, "qiehuan");) a& H8 ^& C9 Y
- th.start();
0 O- p0 Z( L9 c, L8 p9 A" d - }
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- function render(ctx, state, entity) {/ k" f2 R& Z# D. x
- state.f.tick();
- o) A8 O0 M2 W9 e- ~0 ]+ D - }9 m4 I5 J, C# W9 V& ?: G6 w
- 3 ?, a* E" Z' u p
- function dispose(ctx, state, entity) {
8 O8 J$ V. x7 O - print("Dispose");
0 r5 e* c0 D: p/ } - state.running = false;# X$ l H8 P- \5 c
- state.f.close();
+ I4 `, B/ P( z& S( s) T - }9 ?3 U5 u) g' T5 B: O8 C- y" L
$ N# F) u0 a5 O0 k- function setComp(g, value) {
y# B: q1 ^1 E2 t6 E3 ~: ` - g.setComposite(AlphaComposite.SrcOver.derive(value));
5 p# b3 p, B2 j$ u! b7 d1 N0 ] - }
复制代码
) R# i8 m2 T, k& H- U+ Q# |9 C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。- w" g; @% L1 W4 S V, i
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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)) Y/ Z8 b% I- w ~: o0 n
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