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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。
' J, m9 _* \! C& }- importPackage (java.lang); z' L1 B# o' I# e
- importPackage (java.awt);: ~4 h- h, K s/ K8 V
2 R1 D+ q: c! ^, c- d' T- include(Resources.id("mtrsteamloco:library/code/face.js"));
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! `& ]; E% _3 S! e2 {2 ~- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
5 w4 t, d2 E9 h9 @. B, c& W- q; c - let frc = Resources.getFontRenderContext();
7 i' P8 ]+ q! X! @* W; a - bounds = font.getStringBounds(str, frc);, R& @; U1 t* w" ?
- return Math.ceil(bounds.getWidth());
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8 [* S0 I5 D# m/ L5 ]- da = (g) => {//底图绘制
Z5 ?+ R0 |" C" l6 R7 ], ] - g.setColor(Color.BLACK);2 Y# y+ V5 p1 x. C) \3 A! ~# C+ o- p
- g.fillRect(0, 0, 400, 400);
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- ; ~6 ^% O# x5 L" m$ C( j
- db = (g) => {//上层绘制, A7 R" M8 w! m( i# Z7 H, g6 z
- g.setColor(Color.WHITE);( K2 a$ |8 W M ~/ {7 W
- g.fillRect(0, 0, 400, 400);
( }; z6 V& a" Z% q& I - g.setColor(Color.RED);& _& R6 w8 U6 v6 K
- g.setFont(font0);( q/ y& X. h: T% o( S2 D
- let str = "晴纱是男娘";
. a4 z' V# N0 e/ M* U) k - let ww = 400;
& w. i% ]( X( ]" e m f | - let w = getW(str, font0);% N9 [5 Q7 N9 A( [
- g.drawString(str, ww / 2 - w / 2, 200);
) c- H4 B- ]# E# d- ]! z: E5 n - }
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- const mat = new Matrices();
0 H3 \7 N2 k# y5 D1 m/ D: I# m - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
- S* o& _/ _% I* u - let info = {3 t. \+ Q, j$ L2 i
- ctx: ctx,
1 Z6 ]( t& Q; p, A, B+ p" N6 [ - isTrain: false,9 g7 V: e( d7 x$ p, z7 Y1 r& J
- matrices: [mat],3 B3 b5 D9 s* _2 G
- texture: [400, 400],; v- b _( V ]$ H* i
- model: {. X% Y: X+ t( S; E' b
- renderType: "light",
# w/ u- w5 a, V# E* V6 T _: s d - size: [1, 1],8 S/ o! h3 q; b/ J: Z" Z* l
- uvSize: [1, 1]
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- let f = new Face(info);
% B/ n) B) _# A. ^. @4 m7 f( P1 \" G) j - state.f = f;6 h& o) g. Z. M% }
- 4 l/ I$ ?0 _9 j F: O$ K
- let t = f.texture;
0 A4 }4 m8 P1 n# w( E - let g = t.graphics;8 C& ~/ r$ d2 M9 l
- state.running = true;6 Q& ~. g7 |, p; d
- let fps = 24;+ u! i: }7 E4 K7 O" K
- da(g);//绘制底图 S3 x4 F! e$ j& U( p- e/ c
- t.upload();
5 `& e3 f9 H' a; a - let k = 0;) p U. N- O4 H, U4 P
- let ti = Date.now();
* a, ]( W# K' M - let rt = 0;* v6 a3 q% q3 u4 K9 h6 ~8 R4 J
- smooth = (k, v) => {// 平滑变化9 E$ f k, e# P8 J
- if (v > k) return k;
' _6 f4 V! W9 G/ O4 w: j. p - if (k < 0) return 0;
( V7 t' f' { n. x+ h - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
2 R' n e [9 E/ Q# ? `# w - }
) G+ y$ s; d: Q: S1 T" r, D - run = () => {// 新线程. l9 t" j( q* i3 j
- let id = Thread.currentThread().getId();0 l6 G8 A! D r2 e! @7 s& }4 Z
- print("Thread start:" + id);
5 P* o: L2 W# P8 H7 q - while (state.running) {) D3 f) ^9 I9 h% h! x2 y7 s; o/ r/ G
- try {
. z" u- [; Z# j& ^% b5 J [ - k += (Date.now() - ti) / 1000 * 0.2;" r3 a* E9 {9 Z; w
- ti = Date.now();& S. \! e9 C) q) u! W. z
- if (k > 1.5) {: w3 M }0 Y s9 q. Z6 b$ ]. H0 ?$ c
- k = 0;# B/ X- Y; n. ^+ ]
- }% I, _& E" r9 ]; D
- setComp(g, 1);/ ^- E% r8 L# ~4 P
- da(g);0 _ k8 Y7 Q: J. R; O2 A
- let kk = smooth(1, k);//平滑切换透明度
' @: k* r+ e0 O+ |* s - setComp(g, kk);2 u3 Z6 i% U/ a4 X6 c
- db(g);5 G, R3 ?/ H o
- t.upload();2 r' d6 Y/ P% l4 p
- ctx.setDebugInfo("rt" ,Date.now() - ti);, @+ Y) s. G6 L9 ]. o8 b7 I
- ctx.setDebugInfo("k", k);
1 l9 E5 M2 H2 v6 G5 Q; A5 f# l - ctx.setDebugInfo("sm", kk);
/ u, S, p" I/ ?! x( q - rt = Date.now() - ti;9 z" ?" T0 P% _) U, N
- Thread.sleep(ck(rt - 1000 / fps));# N0 U! D' J2 N R
- ctx.setDebugInfo("error", 0)9 u. f- d/ O' `% d# w5 Z2 {7 G
- } catch (e) {8 [" {) u+ c% t' y, p
- ctx.setDebugInfo("error", e);8 i0 S" L8 u7 L( r3 }
- }
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- print("Thread end:" + id);
4 b' Z S0 A2 t' T4 g - }
' J- Y) m4 S0 H! G' Z - let th = new Thread(run, "qiehuan");
. u% M. ], K8 D1 }4 D - th.start();: \; ?0 a1 ]# D
- }: u: \, {% ^ k
- " F; d0 F' t! [9 x$ k! x
- function render(ctx, state, entity) {$ N2 E7 d( \ G8 n
- state.f.tick();5 N' @' |& G" O& A+ R: `+ f9 W. r
- }
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8 i" ]3 t, A# E+ k A0 P- function dispose(ctx, state, entity) {
- M2 D) G) T5 @5 G( u - print("Dispose");$ j$ o. ^/ ^* U$ `5 I: h2 S$ p' Q4 E
- state.running = false;
" Q$ O. y& L9 x9 w2 r - state.f.close();, g$ q# g6 U+ y% v8 p
- }
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- function setComp(g, value) {4 h9 G( \( J- h5 r9 p6 N& R" \4 [+ r
- g.setComposite(AlphaComposite.SrcOver.derive(value));
5 t. S* F8 P3 i" l3 b - }
复制代码 2 L1 I3 p f' O& g; s
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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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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