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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。
/ f0 Y: \5 P7 n5 I% i( ~- importPackage (java.lang);
( m1 }- t' M8 p: y; F% V; u2 B - importPackage (java.awt);
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* P* M% [; ]* Q \0 I* v2 I- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
* C3 T8 w: n! W: _( B: U( C - & `, T: ` F+ Z( Q
- function getW(str, font) {
1 ]' p; n9 Z, n) b - let frc = Resources.getFontRenderContext();
) O4 @; R- C6 M9 ? - bounds = font.getStringBounds(str, frc);% p8 @6 [, t' v4 s
- return Math.ceil(bounds.getWidth());5 y3 w; [( ~" R
- }# X+ O/ Y2 U4 X3 H7 W+ G
0 n$ ^. _; D4 j4 {; x% b- da = (g) => {//底图绘制6 r8 h0 `& C; P6 q6 ^6 ~% C
- g.setColor(Color.BLACK);. t, d( c& y. [+ s( Q; M8 \
- g.fillRect(0, 0, 400, 400);
: q8 i5 ]- L9 Z& L$ [5 U - }
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+ C0 {( R3 ^5 r7 ]" s, u3 X- db = (g) => {//上层绘制- ?5 s% _% p f" q: W! g
- g.setColor(Color.WHITE);
[9 r `+ m# q - g.fillRect(0, 0, 400, 400);
# G# X# J p- J# j3 `. g - g.setColor(Color.RED);$ e7 s: p& C' \" u6 x2 D1 j
- g.setFont(font0);
/ |5 i5 E! K: _* Z; _( { - let str = "晴纱是男娘";) @" f. M+ J9 N, X* o) f
- let ww = 400;; J- ?7 E6 Z% R. H
- let w = getW(str, font0);
* v* ]9 c9 P; L - g.drawString(str, ww / 2 - w / 2, 200);
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# y1 o! K% y% s9 l2 K! v- const mat = new Matrices();
1 K8 C3 W4 Y3 _ - mat.translate(0, 0.5, 0);
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1 A! z+ `7 J& ^; j* B- function create(ctx, state, entity) {& k, k3 ?) v* }" ]/ o% [& u; C+ d6 ?
- let info = {
/ I# Y2 j- U: d& Y. l* a# X - ctx: ctx,
4 j, c) B7 S$ p& Q7 z - isTrain: false,
+ b5 i% |# F ?( o# R - matrices: [mat],
$ A5 t" h5 {! A6 Q. q7 E - texture: [400, 400],- Q% L' \! S6 p
- model: {4 ^ u. M2 W2 R4 B X: I6 g
- renderType: "light",
) d6 t$ k& ]& u6 {; J - size: [1, 1],( s/ |1 s; K6 v8 A
- uvSize: [1, 1]
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- let f = new Face(info);1 y5 ~) p8 `9 _% m' X, M) W
- state.f = f;" m# E6 H- @, ~9 V' g- l1 G
. L' |( J. e! ]$ V% k/ V- let t = f.texture;1 K$ \) L3 f1 @' r& \
- let g = t.graphics;7 Q# v$ J+ ^6 A
- state.running = true;
" j1 P- @) c% e - let fps = 24;
* Q$ ?9 w6 ~, M. n" f# N - da(g);//绘制底图" q( ?$ n6 ?. K* A- H7 B
- t.upload();
+ h. M7 X, k) h* {5 a% e - let k = 0;
2 z$ v( o. B" |" v% e( u& u - let ti = Date.now();; o- [+ b" N9 ~. U3 l+ Q1 D
- let rt = 0;
3 m- G/ g- e* e [: p - smooth = (k, v) => {// 平滑变化
" ~) q1 q. m4 P* b" } u - if (v > k) return k;1 C7 n" [" ^5 ?! z
- if (k < 0) return 0;0 b+ Q( Y$ \+ Z
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;+ i9 s! h0 I9 ?# r' S$ V9 y
- }
2 T/ r( N0 d6 W" m. m' { - run = () => {// 新线程
, w' x6 Y; X' b4 ? - let id = Thread.currentThread().getId();( R+ z5 m( ~* g; ]2 O4 E3 e7 g8 }
- print("Thread start:" + id);
7 ?/ R" j% |( h; q - while (state.running) {3 E/ v5 N1 X7 x8 K+ ?* Z* z4 V. g% f
- try {+ R* l5 N+ e3 V6 y1 [! X3 g; y$ [8 k
- k += (Date.now() - ti) / 1000 * 0.2;
1 r9 E& ~& e; M$ Y0 T" A - ti = Date.now();8 ~/ W% d' L" N3 ]% @2 n: N
- if (k > 1.5) {, l! W$ K$ { R0 Q2 }: C
- k = 0;6 G) }, A7 G D2 c
- }2 g2 S2 K9 S3 U
- setComp(g, 1);% V; A, y' \( f% S: `- T" j
- da(g);
2 d U, @! J1 K# L- Y$ B - let kk = smooth(1, k);//平滑切换透明度
2 n- b4 `5 I \' I0 Z - setComp(g, kk);
0 M" |4 k" K; B c - db(g);5 U/ N7 \, `0 x3 Q1 `, x
- t.upload();
( C( Q! S. e" q3 `! q2 F - ctx.setDebugInfo("rt" ,Date.now() - ti);. g- \8 w3 \& T7 T9 }3 ?
- ctx.setDebugInfo("k", k);
8 `3 E8 M2 n: g0 \) r( z1 v - ctx.setDebugInfo("sm", kk);
) [; ?9 H- f+ _ - rt = Date.now() - ti;0 X2 y8 W' @6 d1 G7 P
- Thread.sleep(ck(rt - 1000 / fps));
* y+ C# y3 J9 g5 `/ w - ctx.setDebugInfo("error", 0)
. K$ L; x5 B0 b - } catch (e) {
e( C* j2 j" R2 Y2 P( _/ v4 v& Q - ctx.setDebugInfo("error", e);8 b" {5 {' F" ~- G6 d. h. }
- }
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- print("Thread end:" + id);3 M- V( b% d c) z0 k0 _" P
- }& Y' i: H1 [6 V# Z) V& v" j
- let th = new Thread(run, "qiehuan");# K) n( g/ C* [
- th.start();) n& z9 k( M" t$ D' D, T
- }/ E$ C6 E0 B3 x6 H/ _& V3 N
% N7 g2 f$ ^( ]1 D/ w" @- function render(ctx, state, entity) {
' E/ a5 W' p% W/ m* { \" i) I2 p - state.f.tick();) k; b* H# G" w* m) c
- }
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- function dispose(ctx, state, entity) {
1 X& _' a$ b& c3 I - print("Dispose");- }% [, S! h1 k
- state.running = false;1 O+ \- k9 P$ I2 O% _" {
- state.f.close();
, f" ^- ~9 [3 }9 z - }0 @* a& _9 X! t3 b0 {% |( ?
- * ^" r% r1 } B6 p4 B
- function setComp(g, value) {
2 p0 Y' O2 A& J0 [ - g.setComposite(AlphaComposite.SrcOver.derive(value));" E4 |4 ?+ ?3 F; n, F1 c
- }
复制代码
1 ]. G4 a5 D* U% f9 q) F- o- X" f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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, m$ C) V6 ]8 n* h, O3 y- j: \- j, j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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