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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。) r$ V& t2 [' v
- importPackage (java.lang);8 C, a/ s, S4 C! J7 Q
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
- Q4 R& J+ E7 Y( M5 I9 ~ - 1 |+ W0 Z4 o6 e: _. m. t
- function getW(str, font) {
! f9 ]* l. z- K6 E9 S - let frc = Resources.getFontRenderContext();
# S4 A3 f( s7 L& M - bounds = font.getStringBounds(str, frc);
3 x& G& m: C6 g% ^8 Z, t - return Math.ceil(bounds.getWidth());$ q# ]/ t& s. L# o- M* |9 ~
- }
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- da = (g) => {//底图绘制' K: V6 J5 J/ r. z5 p( a7 L
- g.setColor(Color.BLACK);! O5 @7 B7 n+ c2 B; Q( J
- g.fillRect(0, 0, 400, 400);
i' Q7 Z5 H9 y% @7 B5 O8 g* j' x - }
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- db = (g) => {//上层绘制
9 f" L! P: U2 E- }& ?; a - g.setColor(Color.WHITE);
7 U( a+ W+ _6 j$ n - g.fillRect(0, 0, 400, 400);
: Q6 V5 [% ] g w4 s) G - g.setColor(Color.RED);0 F4 w7 x6 t& K. q* d" O: t
- g.setFont(font0); U$ U5 _& H3 ?' A5 g, {! S* e
- let str = "晴纱是男娘";
+ O; _+ M. t0 J( q - let ww = 400;
9 s5 T- x/ ], o" k* p - let w = getW(str, font0);& d9 U4 X6 _ W e1 {7 K
- g.drawString(str, ww / 2 - w / 2, 200);. {8 V5 [5 S& b. Y5 F5 V
- }
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- const mat = new Matrices();
6 p3 M4 S% ~9 L0 p3 }6 P8 f4 U1 G - mat.translate(0, 0.5, 0);
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& i J7 X4 \ ] U1 P- function create(ctx, state, entity) {
1 `' q# p- ~1 `! T) V( s% p - let info = {
; _- Z: \5 J4 w6 P& L) p2 j) i - ctx: ctx,' g/ c( E4 [6 E/ {! X2 F. i
- isTrain: false,
, Q# S% m1 I* K$ K% r* K - matrices: [mat],
% z1 |; {! Q! c; c \! F - texture: [400, 400],) X" A* Y. d3 I1 D- x8 d3 n; o9 W
- model: {
. q% Y1 [7 L- v - renderType: "light",
d8 t/ u% t S- O: b& x1 g0 k - size: [1, 1],) y: S3 z" U+ L& s2 B P3 J$ k
- uvSize: [1, 1]
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- }
9 W8 |4 W8 f( d- \9 ? - let f = new Face(info);& F& K. G- m# j- Y9 {, [8 C9 L
- state.f = f;$ e3 u1 g% _* ]/ M" }
% o/ ?* m* _' V" h/ i6 c- ^- let t = f.texture;
5 F" U5 e0 @/ M; K5 k* Z8 N( [ - let g = t.graphics;% e4 Q4 Y. J# b( _
- state.running = true;( c% t5 L" f8 e0 o: w- z9 j
- let fps = 24;
. e$ H9 a( r- R - da(g);//绘制底图) {2 i. K/ @: ^+ [
- t.upload(); h5 p( b6 B( v/ N
- let k = 0;2 {9 Q& p; {8 X" ~6 M% _
- let ti = Date.now();
# c# k0 [" d* b6 a+ @ - let rt = 0;9 e, `0 m. l+ l/ L5 N
- smooth = (k, v) => {// 平滑变化
$ F+ ?$ l! n! j& \$ q( a4 ~, l1 B - if (v > k) return k;3 R6 Q% l0 m" i9 r8 V( \
- if (k < 0) return 0;
/ v5 k8 o, y3 }+ C( W2 ` - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: N/ f9 ?8 r" U, }# {
- }
# f. k/ L( h! x9 Q - run = () => {// 新线程
x9 i* D7 _ c7 V9 ^( j: T+ j - let id = Thread.currentThread().getId();& d0 ~+ C1 k1 z5 c2 j
- print("Thread start:" + id);
1 O! h) h: n& e' q2 ^# u - while (state.running) {
; `0 C0 B1 Z K8 O) b9 @8 i& R - try {7 t8 [* t+ w; Y0 C8 c
- k += (Date.now() - ti) / 1000 * 0.2;
. T9 |; `/ ~" W" j5 @ - ti = Date.now();
" y& t+ C2 p9 o* K4 C+ R: \ - if (k > 1.5) {+ ]2 P4 t) f. e; l/ a* `9 ?8 T
- k = 0;
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- setComp(g, 1);5 l' K* \- w+ U t) g
- da(g);, h! ^3 `0 C4 a7 h+ Z7 K8 t
- let kk = smooth(1, k);//平滑切换透明度
( ^- z( ]( L0 {" M - setComp(g, kk);
4 {7 d, t! H7 | - db(g);
# \. A( g. y. e K4 E* f6 z - t.upload();* d; X/ r* I" V$ D- B
- ctx.setDebugInfo("rt" ,Date.now() - ti);/ h$ o5 k2 J4 g" l7 M; Z1 f$ w
- ctx.setDebugInfo("k", k);
+ {2 }6 S# s7 U. W& G# m - ctx.setDebugInfo("sm", kk);
) ^. O3 U* @) d4 t - rt = Date.now() - ti;
: Z! L8 Y% v J% y$ s2 m# [& _) b; u - Thread.sleep(ck(rt - 1000 / fps));# v( a! X7 X: P
- ctx.setDebugInfo("error", 0)
) P% |) E# S$ ~ r* S5 Q - } catch (e) {
$ g" c h. t& o# ^ - ctx.setDebugInfo("error", e);
4 j4 ]5 b& I9 n. O - }
3 s" v; y# l, g$ m7 }7 } - }
& E9 ^4 r" P4 J1 Q8 X - print("Thread end:" + id);
" z1 t D8 @" ]8 b3 q - }9 w' m7 |* q& \" {
- let th = new Thread(run, "qiehuan");/ @. R* p) I$ O+ ^) [" {
- th.start();+ w5 ?( M# u: d( x
- }
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3 s. Z6 J; e4 q4 d# A, T/ J- function render(ctx, state, entity) {
( e0 }! s( N' r) G - state.f.tick();
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+ N7 j% V6 I5 L- function dispose(ctx, state, entity) {
5 O$ a& T% ?! g! \/ T - print("Dispose");
9 h" a' q8 v# y& z0 i - state.running = false;
. L( ~" p+ c; o: e - state.f.close();
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- 4 P# A; k- a6 m* O4 G4 b6 }$ }
- function setComp(g, value) {: s- r6 |/ ^8 y" t6 {6 b* k3 l
- g.setComposite(AlphaComposite.SrcOver.derive(value));5 @; q" l- |. \( z2 o; `& s) ]( W
- }
复制代码
/ l/ E9 b* T% F# e5 d/ k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 b+ Z2 R9 h2 W
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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)& I# T$ [ {1 \
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