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! \. V. l: j8 ?* `0 \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。
" A s. ?1 N( l7 Y; ~' I7 T- importPackage (java.lang);5 m F. m5 m6 n( y; N% r
- importPackage (java.awt);
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Q5 X7 s2 L" e% A. W* u# o8 ~- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);% k: u! a/ K' e0 O
$ F. B% V/ {( H6 B" [- function getW(str, font) {
. p+ U, X" }( H$ |- p9 Y - let frc = Resources.getFontRenderContext(); _% b. a) w6 n% ]
- bounds = font.getStringBounds(str, frc);
; ` B) ^& S0 n! C/ s7 R6 T$ F9 E$ `4 G. D - return Math.ceil(bounds.getWidth());
, m" {2 J( [: V6 N! | - }
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- da = (g) => {//底图绘制' Q" N' n( b! s" u1 \
- g.setColor(Color.BLACK);8 W& g2 J4 d% Z+ s8 l9 y/ d
- g.fillRect(0, 0, 400, 400);9 k' a. r1 `$ B/ d' i8 s
- }
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E2 G/ H1 ]/ q$ _0 Z+ h6 U- db = (g) => {//上层绘制3 w3 H8 F8 @8 R! y2 K& L& O
- g.setColor(Color.WHITE);' |; i0 ]& `* \
- g.fillRect(0, 0, 400, 400);
( Q/ e2 e2 N* ?0 r - g.setColor(Color.RED);! C- j2 N$ l' }, l2 \2 j; S
- g.setFont(font0);
% p( t7 O- X3 e- [! N* c6 c A - let str = "晴纱是男娘";
, m* x; M6 ^, i1 V' l% P" x0 O - let ww = 400;* e2 U1 r! u/ C; o+ j1 ^. q; p
- let w = getW(str, font0);# T: L( h2 M C
- g.drawString(str, ww / 2 - w / 2, 200);0 ]3 O, n# A* H1 }' M5 }
- }
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- const mat = new Matrices();0 ]& r2 z9 f H
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
: @ F, `( C( ~. \ - let info = {' ~5 X2 Z! R- |
- ctx: ctx,
$ {/ @+ X2 p$ Z% L/ S5 k - isTrain: false,
" |- j& B+ l$ Z" H - matrices: [mat],
7 J( s- e1 y% E P - texture: [400, 400],7 @7 ?& X+ f! S5 `2 n, d
- model: {
9 A# p& \- F: C8 S% l; C - renderType: "light",
8 C, s4 K* _! ^ G0 l+ p# D - size: [1, 1],
( K. }0 M& @9 f% S; S& O( t - uvSize: [1, 1]: J( ^- m( `* ]3 j8 g
- }
) F: `3 |$ o# [9 g/ j2 q - }
4 V) P0 e2 \: Z4 z# m5 ?) V - let f = new Face(info);
; G6 X) z+ p8 s - state.f = f;
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6 a+ {! u4 h: X- let t = f.texture;
7 F5 F8 x G6 ?% o - let g = t.graphics;; B* W8 D$ V+ a5 x# C0 B' I
- state.running = true;: ?( Z2 q. t) a/ T8 D# Y3 @1 R
- let fps = 24;
4 N9 T( s* k# _' \+ |; a7 U - da(g);//绘制底图
) t4 e2 a8 a7 A1 j! [$ P - t.upload();9 k- T! M7 \# }; }6 V( q4 `
- let k = 0;
$ C( J, _ L& C/ H) T4 r5 k6 b - let ti = Date.now();
|5 J* J; |* y$ Y1 Z - let rt = 0;# d- c+ P0 _ R9 y4 C7 g2 F
- smooth = (k, v) => {// 平滑变化, y% c' a6 j5 f- X i
- if (v > k) return k;; @" c8 ~2 A; Q) F6 t) k
- if (k < 0) return 0;
5 E8 ?0 E3 ~. n n% t - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 P- J6 k) V \! s% F+ u" ~
- }1 O( G+ }) i( k5 |3 W ?% H
- run = () => {// 新线程5 @4 S9 t& N R7 a4 }& R
- let id = Thread.currentThread().getId();
4 ^% d+ n$ V; q: o+ z9 Z5 r7 W" c - print("Thread start:" + id);' S7 V3 {. a6 h" l; _( {
- while (state.running) {+ N3 R h \9 f) K! j9 C
- try {
6 h! W0 @; k( J8 `* { - k += (Date.now() - ti) / 1000 * 0.2;3 M- \3 s; Y/ I# |/ z
- ti = Date.now();
- Q' Y- p- u" Z3 I9 K7 m - if (k > 1.5) {' Z. F6 f) I+ ^1 C
- k = 0;9 m/ S0 R! X9 X4 {
- } L3 U+ m2 v, W, B$ @) W ?
- setComp(g, 1);; X+ a: C# @1 }8 V/ \4 {! s
- da(g);5 u5 z' ]; `( P: p2 J
- let kk = smooth(1, k);//平滑切换透明度# m* @% h. y3 K
- setComp(g, kk);
; O# C8 F7 A' }" L0 `' @/ J6 d. o - db(g);0 U2 _. W. p7 F# B
- t.upload();
3 h0 M; S/ K6 ? - ctx.setDebugInfo("rt" ,Date.now() - ti);7 m3 T; D: q4 |2 g0 ]) \
- ctx.setDebugInfo("k", k);
9 v1 m5 S- ]0 u& Q: u - ctx.setDebugInfo("sm", kk);8 Y( A! Z( r1 m6 f6 [7 _; ?
- rt = Date.now() - ti;$ Z: t0 d5 ~8 s, s$ ?8 J {, Y, A
- Thread.sleep(ck(rt - 1000 / fps));' W6 ^- a/ e5 r$ _5 @
- ctx.setDebugInfo("error", 0)1 I; F/ Z! R9 j, G
- } catch (e) {# ~2 ~6 a/ [) U% `6 Q7 t$ P) {
- ctx.setDebugInfo("error", e);
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- }5 }# Y& ?' w0 H3 a
- print("Thread end:" + id);2 A6 U) I$ p# M4 _& _0 K
- }5 c6 f1 [9 ~% B, f
- let th = new Thread(run, "qiehuan");& w: t8 B. r+ y
- th.start();
6 L* a- A* B+ w, o3 ? - }
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, V. g) ?* Q/ V; b% D8 Q Z A! e- function render(ctx, state, entity) {2 }- ~3 b" D4 S, S. R# N0 L, X0 ]
- state.f.tick();# c2 Y; M6 h8 _( ]" k# y8 |* Z1 f
- }
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- function dispose(ctx, state, entity) {% p) O+ @1 [8 P9 }# @6 U( s
- print("Dispose");% Q) R& D. v! f/ V: i* ~
- state.running = false;
4 E( [3 h8 Q7 O- a& ], G8 X - state.f.close();
5 x/ @6 I6 `+ S! G% H4 o! k - }
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- function setComp(g, value) {
5 ^3 I1 w# b1 e/ M# M" @ - g.setComposite(AlphaComposite.SrcOver.derive(value));
5 q5 p) H' s: M+ l5 W0 ~ - }
复制代码 3 g9 B1 H3 ~9 Y3 Q
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。, \; x5 {& O7 P
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3 r5 y- E3 \8 v. ?5 W) i! L顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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