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7 a+ m3 J$ ~% s3 E/ g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。5 b ?" B- `. L6 |4 u( U
- importPackage (java.lang);
2 K! I( r% ]2 L. Y7 w4 b - importPackage (java.awt);5 v. z# Y# N$ e% N- c
. ~+ A9 z8 `# _" u/ l- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);/ U" M! F1 d/ Z8 V# e
- 2 j" F0 q9 _# l$ s
- function getW(str, font) {
% j* H7 Q- e3 O% a, n - let frc = Resources.getFontRenderContext();% \% c. i0 c1 ~; g0 I$ S
- bounds = font.getStringBounds(str, frc);0 i6 Q6 x# o& k% _6 E0 `4 `
- return Math.ceil(bounds.getWidth());( i' I% E) }5 w* ~" ?! _, J
- }
" I! z- R; W7 I0 R: t, E0 f9 s& V, x
4 v, D: {8 i2 H; A- da = (g) => {//底图绘制
! Q4 K1 l/ E1 | T$ w - g.setColor(Color.BLACK);' X' v# F' q% V* [+ Q3 O
- g.fillRect(0, 0, 400, 400);/ n$ V! b! C5 P, _: v7 `0 |
- }, n/ R$ _& h3 N8 n& A6 P( j" x
8 I6 l3 M6 @" i$ d: w- db = (g) => {//上层绘制
# X; o3 S6 Q0 v) u2 I0 m - g.setColor(Color.WHITE);
6 T) U& E! B- ]2 p9 L0 v - g.fillRect(0, 0, 400, 400);1 X2 _2 a+ \- w' `/ O$ a0 B
- g.setColor(Color.RED);
6 Z* {/ P. V% E: n2 \, u6 x3 X - g.setFont(font0);4 j9 _6 }; \; E$ }2 n4 p
- let str = "晴纱是男娘";
3 x! S. w$ ?* S2 f3 D - let ww = 400;- o% ^( r& g$ P& c
- let w = getW(str, font0);
# L2 a% H: ~* Y/ B - g.drawString(str, ww / 2 - w / 2, 200);; X3 U) U% ^ w8 y3 C2 O8 W' q
- }
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|! a- N( w4 j( ~1 w3 L$ V- const mat = new Matrices();% D! p, B5 U9 g, x
- mat.translate(0, 0.5, 0);" J2 [1 K$ R8 p) o2 d
- $ _1 p7 z; j" Q: f4 Z4 \
- function create(ctx, state, entity) {% e2 [) @( ^5 x+ T2 _+ n7 r8 a0 m
- let info = {
( T9 y$ x0 J8 B) C+ }9 C8 E$ D5 B - ctx: ctx,
) u9 L( \' A9 U; K - isTrain: false,
9 K9 m( `- }. Y8 k b8 E - matrices: [mat],8 Q- G9 @" b" y" d
- texture: [400, 400],
( O( v, N8 j9 M1 } - model: {
5 k+ i [1 e* T' ^4 N - renderType: "light",
0 q# I+ }$ l4 Z) a - size: [1, 1],
6 g. F: d/ \- [# M' R" x% h. b - uvSize: [1, 1]
" \$ Y ^% L2 e& y - }
$ n. l( w* A! K* L. @; A - }6 L: x- w. A6 n' ?
- let f = new Face(info);
+ v( a. s$ f: L, s - state.f = f;# x' K5 A) X2 B" W" ?3 S
% _% @: `7 C' f6 \1 u7 U7 Q! }# m- let t = f.texture;# L4 ^3 M8 Z c D
- let g = t.graphics;
. D! x3 f4 i; F4 Y: K7 X - state.running = true;) K3 c/ w$ O1 L! i! h" G G" c
- let fps = 24;* w( e, ^7 V# ^5 `: X U2 c2 V
- da(g);//绘制底图
$ R4 f0 d1 p& \2 j4 K; B d; c9 K2 Q - t.upload(); I( g% m, n5 M8 a7 R5 L5 a9 r( S
- let k = 0;! i$ e0 f! M& w: E6 L: P0 Y# c0 x$ [( V0 M
- let ti = Date.now();. L! B5 \3 ]; [7 h4 z8 l0 b
- let rt = 0;; f$ \, i8 Z6 B
- smooth = (k, v) => {// 平滑变化
/ e' b2 Q, u. y* | - if (v > k) return k;0 R3 g+ J$ P/ h+ E; b
- if (k < 0) return 0;6 l L7 d+ w8 B
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
$ P4 E, w6 {$ F' ]/ M - }
' t& E/ k6 A( g. I - run = () => {// 新线程( i5 w+ q1 y8 p6 |2 Q I
- let id = Thread.currentThread().getId();
7 R/ U" L J! d! l+ {/ r5 @' c - print("Thread start:" + id);. ]0 O P' Y( c4 N4 T6 Y8 F v- t; G
- while (state.running) {
" j4 |4 p/ s0 x' M0 E g! W. ~9 m+ a - try {7 x( E+ D) W1 E9 q# o, c% u
- k += (Date.now() - ti) / 1000 * 0.2;2 U- x# }$ k2 Q6 s) z. J
- ti = Date.now();! P0 Q$ p" u0 m) v
- if (k > 1.5) {
7 P2 P ?5 C H# W - k = 0;: {; ~' L, o. F4 V" @3 S
- } r- i0 Z7 `, V9 i& z
- setComp(g, 1);
# {: Z# ^% [4 Q; H+ O; g3 W - da(g);
2 q; e' N" l2 d$ U5 v& N - let kk = smooth(1, k);//平滑切换透明度
8 f/ \1 @( \ T8 @ - setComp(g, kk);
$ F8 D. h \6 Q - db(g);
5 T- v# H, {; a1 Q7 C r# C - t.upload();. E& D7 J5 C0 ?& x! f; g
- ctx.setDebugInfo("rt" ,Date.now() - ti);
6 s2 u ^# l, M# D) y - ctx.setDebugInfo("k", k);
' d3 W/ L5 S5 w - ctx.setDebugInfo("sm", kk);
2 i) c0 `* \9 q' B% n) w' N - rt = Date.now() - ti;
) o( R6 L7 Y7 u3 c - Thread.sleep(ck(rt - 1000 / fps));
9 P+ a2 C! W1 A C - ctx.setDebugInfo("error", 0)+ V H3 B9 k# C) u- V" i
- } catch (e) {! h# X9 V. D# y5 X
- ctx.setDebugInfo("error", e);
/ d4 t" i/ `) h8 z* A - }
& G/ Z1 C' R3 p/ G - }- J2 Y+ ~5 o; d: h) {
- print("Thread end:" + id);
) ^& I: R& N9 c3 i' U - }! ]4 k5 C9 d) B4 \0 S, H
- let th = new Thread(run, "qiehuan");
, i" Z+ f0 D# ?# U7 _' u - th.start();
j5 \( N! m7 _+ S3 H - }
1 p7 b, f/ t/ h/ Q1 n
: @# b% ~/ w$ J2 H+ q3 ~- function render(ctx, state, entity) {9 Q8 z: d( U$ d, F8 m; ^
- state.f.tick();
' q! t/ c0 _2 [ - }
6 b6 G# ?) Y! s/ S
# x; U! \, ?. N( z$ D" ` ~- function dispose(ctx, state, entity) {
) E$ k; J. B; y- `5 v Q - print("Dispose");2 h( N( s! _. x3 l
- state.running = false;
3 O0 j e3 W; E2 ] - state.f.close();& l/ {6 h3 e- E7 E
- }
+ R/ k! _* h% s. f0 M5 m3 h
& Y) `. \% Q t" }. G- function setComp(g, value) {% s9 @% l, P8 o' D6 k
- g.setComposite(AlphaComposite.SrcOver.derive(value));4 D8 d( h& Y9 Q, A2 D
- }
复制代码 7 r# Y& M4 M- g- B, 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。
4 H1 I i8 u1 j& T$ T, S3 P+ d- `: y. ~! g; N6 k5 T. X
. |, J& ?4 P7 r3 ^0 _0 c) G顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)( x2 @4 W2 d @% c2 ^# u. \
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