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; D3 F' q5 _7 o9 \' Q# G' Y8 Q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。: [3 Y; r, @$ q1 Q: Y5 N7 A
- importPackage (java.lang);
2 u# R$ s4 |# G y& Q - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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0 z# w2 f$ G y' z$ s6 f7 P- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);$ P: i2 G, j9 e7 |* { b
3 q7 D4 P& p! z7 n8 R- function getW(str, font) {* t8 f& D( ~. I- X
- let frc = Resources.getFontRenderContext();
( v3 C% b* Y2 {* q; j - bounds = font.getStringBounds(str, frc);: K6 H. f( ^' B: z9 P ~
- return Math.ceil(bounds.getWidth());4 e$ k8 d, B- M
- } ~6 _0 O# ^" L' G+ Q2 N
$ F" v3 G3 I. H$ V6 X& p- da = (g) => {//底图绘制8 Z. }6 g' {. D
- g.setColor(Color.BLACK);
8 _9 s+ j' k8 x. E6 ], { - g.fillRect(0, 0, 400, 400);
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- " z( B, I* [9 ]# ]$ U( p
- db = (g) => {//上层绘制
4 }7 y1 o( r. u0 W - g.setColor(Color.WHITE);
0 G# q2 @3 X& g, N% M - g.fillRect(0, 0, 400, 400);' }" Y$ _. T7 B9 W1 }
- g.setColor(Color.RED);
# |$ U y- j5 S+ T - g.setFont(font0);
. O( G: |$ u N% f/ \ Y# b - let str = "晴纱是男娘";0 E+ r4 H# G' Z% {; H/ G
- let ww = 400;
4 y( ~* G- ^6 A1 Z" P& R. j0 V# s - let w = getW(str, font0);' u) E* G* S% a9 H
- g.drawString(str, ww / 2 - w / 2, 200);
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, U6 T! N5 v1 O4 O. ~8 a& z- const mat = new Matrices();
/ U& b7 { D( O7 r0 W5 K+ | - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {$ i0 \6 j6 g8 V4 i
- let info = {$ U7 t, g4 T: p* d& D
- ctx: ctx,. X6 r; h) ]" s, `* ]; ^7 b0 N6 S
- isTrain: false,$ ]5 f% o9 Y) |
- matrices: [mat],
0 X3 w2 `2 o4 K/ v1 k( ^ - texture: [400, 400],2 I5 C; j. w. ]/ B6 S6 \" }! a
- model: {
. l2 K* ?/ K; J) ^ - renderType: "light",
# ]; Q0 A" r" n% ?) y% l. r - size: [1, 1],$ n$ S- }4 ~9 A7 `! d0 f
- uvSize: [1, 1]
6 F" N) z: _6 i, G) T - }
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- let f = new Face(info);! w" m. U$ [7 d0 E' }1 m
- state.f = f;9 ?9 C+ Y3 r. P& B
7 M( K; A7 D0 N; a3 r$ |+ V- let t = f.texture;3 G: ^. H2 E! i6 N2 X
- let g = t.graphics;
8 l P) ]* f; {* ` - state.running = true;! \ p' G8 Q& ~- Z: I
- let fps = 24;' G. d0 z* M" l/ a
- da(g);//绘制底图
+ k0 r. P$ I; j' ] k - t.upload();
( V! A# ^6 x9 T: S$ d; E- f - let k = 0;( ^# e! R, k: C1 H8 M6 e& |5 i
- let ti = Date.now();* F2 n* `( R W1 ~# }" e
- let rt = 0;' s3 _6 x0 B' X4 ^$ g$ s0 i8 T
- smooth = (k, v) => {// 平滑变化
2 @8 B. v+ J) a) O9 Y. G9 p- L - if (v > k) return k;$ \9 a9 S& W' I8 l
- if (k < 0) return 0;, S7 k' ^8 C+ |
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程+ |0 r: `7 t' L: S: v7 z2 J, m
- let id = Thread.currentThread().getId();
6 C/ V5 F3 X: Y: l - print("Thread start:" + id);
+ K% m+ M7 Z+ h. G; Q) q0 u- `6 G - while (state.running) {
+ m: O/ a+ _# D) }' M - try {
, {- X+ M' l! B! `) I - k += (Date.now() - ti) / 1000 * 0.2;
) ?- X% W0 A$ h3 ^ - ti = Date.now();' o& Y# w; v' t7 v e. [' h, N f
- if (k > 1.5) {6 z* \1 K8 r' x J- S* N& s
- k = 0;
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- setComp(g, 1);
. [- x- N1 j7 T2 ~ - da(g);
- a4 `% S6 G) G - let kk = smooth(1, k);//平滑切换透明度3 y/ ?- j# `2 j5 K$ A
- setComp(g, kk);& ^ S7 Y9 x% U) s
- db(g); g7 Z$ B% P" b2 t
- t.upload();
8 g8 r% f$ h0 O1 |* c9 Q3 _- K - ctx.setDebugInfo("rt" ,Date.now() - ti);
4 D9 O- q" W* A0 w - ctx.setDebugInfo("k", k);6 l% f; H2 k3 O, b0 U2 ~; y
- ctx.setDebugInfo("sm", kk);4 W7 A- j3 Q. Z9 t' w2 C0 [
- rt = Date.now() - ti;
& P2 i# t. W P' H" u' q - Thread.sleep(ck(rt - 1000 / fps));
3 z+ s; T' |9 q+ V; D H/ n; q- T: R - ctx.setDebugInfo("error", 0)# c% _+ V& J c. G" I
- } catch (e) {5 j3 V" ]/ z d' Y/ G9 \
- ctx.setDebugInfo("error", e);/ z( l8 c& z0 D& E. Y2 h/ |
- }
0 a& I) E. f8 Z/ Q0 f( v% ? - }
. Z; l+ L" J0 V- R - print("Thread end:" + id);
% W$ w* f6 u5 ?% V9 o. T# n# Q - }
$ w1 D0 j8 F H6 c - let th = new Thread(run, "qiehuan");
6 V; b- k7 \5 Q( R - th.start();# l1 I. o: U! E, L7 W
- }; t' _7 c, L- ~$ k) Q. |6 ]* c
- " g6 Y; ~2 u4 X; `! Z' }
- function render(ctx, state, entity) {
& j, W4 l* W3 o m - state.f.tick();
, T5 D+ s+ b0 e - }
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1 W- G! ~& t+ J3 [# [- function dispose(ctx, state, entity) {
4 u" [* e+ W4 V - print("Dispose");+ D( `4 c9 S0 C
- state.running = false;
8 n0 \5 H" r6 g( O& s - state.f.close();; c; l; l6 q1 k
- }
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. S- o! h1 D" q( @: K6 M- function setComp(g, value) {
4 F, h; B, X1 N2 B - g.setComposite(AlphaComposite.SrcOver.derive(value));; r- f; {0 _; {$ d3 W6 C: B7 l: Q
- }
复制代码 : A: D Q' f! I7 ?& ~# J6 f" A
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。( e, Q% @# j4 K( u; o4 q5 H
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; S; G, i& L0 x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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