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' ^, K! U2 g" {1 J$ r! ]6 d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。
6 D7 A. A$ O' t- k9 o' }, `# c- importPackage (java.lang);
+ d2 K* Z7 Z) A& B; y( a# R - importPackage (java.awt);6 n, ]5 N7 k5 k" m4 C7 r
- 4 a- @. N9 @, {3 D! q. b
- include(Resources.id("mtrsteamloco:library/code/face.js"));
: {/ r" }' o. @. e2 w2 P2 T. @+ ]
/ \/ m0 {& q5 s3 \$ q$ N2 n/ @1 i4 |- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);' {% n9 J* W* ^( K. l/ k' ^
7 j- I. v' ~& s. S7 ]* |- function getW(str, font) {
) w* c8 u1 q1 r" \5 {' u) S6 F' ` - let frc = Resources.getFontRenderContext();
1 G" J; t) S7 O# N/ k5 s+ ~0 O7 Y - bounds = font.getStringBounds(str, frc);
! h- U- [) j4 l7 M3 N; f% x - return Math.ceil(bounds.getWidth());
9 @ \9 m% n) _1 D6 J: e - }
9 L+ [0 x4 C1 J1 g2 U, S1 I, z" e - 1 |! L0 Y+ h u! y8 A! o
- da = (g) => {//底图绘制4 t5 J( p/ V: v, T4 P- r/ f* r
- g.setColor(Color.BLACK);
& f. i' i# p& {# Q' S* ^ - g.fillRect(0, 0, 400, 400);7 J* g; f% Q. N. f
- }
8 i' w" k4 P2 c, N
8 X9 N8 Z: V( M5 L2 G/ U- db = (g) => {//上层绘制
& p5 _- s5 S0 c+ l3 U - g.setColor(Color.WHITE);
# o2 [$ h5 ^! M9 h - g.fillRect(0, 0, 400, 400);. B6 M2 R3 g3 i9 f% I' ]( P
- g.setColor(Color.RED);3 i, O" I5 @1 h$ N" @
- g.setFont(font0);
' \6 \* r7 _$ t9 Z - let str = "晴纱是男娘";( S$ Z* b0 I( f/ Z% F% h7 E/ b6 O E
- let ww = 400;
) H( g. m6 w8 H' |, V% ? - let w = getW(str, font0);9 G' R/ H" v# O. f( v! }* H
- g.drawString(str, ww / 2 - w / 2, 200);
9 ~; X7 o8 V- E - }
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9 h! j, [$ k: i& F- const mat = new Matrices();* U. K4 g7 {- q: E s& S' d" E8 T+ h
- mat.translate(0, 0.5, 0);
6 {5 ]) A3 e. g4 S - 4 |1 y" T9 |% |8 ]
- function create(ctx, state, entity) {/ J8 N0 R9 l' H& Y0 r' }: T
- let info = {
S) [4 W. f$ h/ x1 Q - ctx: ctx,
. m& Y$ p; }( a0 L. M3 K* O$ A( ?6 B - isTrain: false,& F0 B2 M" D/ G4 q5 ?
- matrices: [mat],
. ]* U t4 f- P7 m3 p - texture: [400, 400],0 T/ a2 E8 D( A$ O
- model: {* m) K' ~3 d+ j& S1 r( Y, h
- renderType: "light",
9 i" s( G+ r v - size: [1, 1],
" [" ~8 Y7 P, @: J/ m+ }# h - uvSize: [1, 1]
! p) |4 N6 g& M' D- y1 r8 P! c4 ] - }/ M# z2 ?$ U. ]2 G: m2 c. X
- }
+ u0 w3 Y3 l7 ? - let f = new Face(info);3 Z) T( |0 j2 `
- state.f = f;6 m8 S9 y U/ N7 O, F$ G4 ^* H
! d2 s3 F+ x6 j& ^- let t = f.texture;
5 p/ ^9 ~4 I& n3 o# I - let g = t.graphics;
8 n' R* G7 |; u! c - state.running = true;
9 q8 I( H9 @- _: j. S/ Z; f - let fps = 24;
5 o& W- b/ M& Q2 k; A& r( F - da(g);//绘制底图! {/ I/ L; H" Q; x' E9 E
- t.upload();9 G# z0 w0 l/ O) N& L) I7 x
- let k = 0;1 f! s; C2 z+ f9 a5 X, v) y% F4 x
- let ti = Date.now();! |; p- l. f' j, O& D/ B2 x) u
- let rt = 0;
$ H' e; ]( w: F6 y0 N$ H - smooth = (k, v) => {// 平滑变化
3 |5 m; R% C# v, A3 Q% m - if (v > k) return k;! u, ^, Y f# s
- if (k < 0) return 0;
$ t0 j' B3 l9 g& y9 [& | - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! x7 S: L" i! `5 H9 E# E - }
_+ }7 H r; H; K0 C5 T' \' M5 n - run = () => {// 新线程
4 \4 r/ P3 O1 u: o. S) } - let id = Thread.currentThread().getId();
, N# a% h. x$ ?0 X8 P9 J6 R, _ - print("Thread start:" + id); n. ]( h) T) V# f
- while (state.running) {
( S$ ?6 }( Z- M8 K% G - try {
6 e0 ]$ g- H a! o7 G' u% Q( M - k += (Date.now() - ti) / 1000 * 0.2;8 _! T* I8 x$ B3 y
- ti = Date.now();
5 i( r i$ F% x* ~5 V0 N - if (k > 1.5) {2 O9 m' ^- }* Y9 X
- k = 0;) l8 b% ^. M* }% P
- }
, t+ S7 U1 b* @ Z) U7 r- f, Y( V - setComp(g, 1);
% N# S/ W0 X0 t( H0 R - da(g);
. g d+ C. b. D - let kk = smooth(1, k);//平滑切换透明度/ L2 R* K, J( [# i5 H/ \3 m8 S
- setComp(g, kk);" l; V7 L' M( A, v( z
- db(g);7 H3 W$ X( Y3 S, s9 |& I$ C
- t.upload();
n+ W! @$ Y0 A2 E( e7 X - ctx.setDebugInfo("rt" ,Date.now() - ti);
( _/ m [6 F5 U - ctx.setDebugInfo("k", k);
3 T4 [; [# t q - ctx.setDebugInfo("sm", kk);) Z& |% k1 |- w
- rt = Date.now() - ti;1 @1 X: @* s1 b/ r" u
- Thread.sleep(ck(rt - 1000 / fps));# }9 Z7 T W: M# m) W" l2 i+ T
- ctx.setDebugInfo("error", 0)
: h% x5 G6 f$ {' I9 z% Y7 V ]7 h - } catch (e) {
* c- F" e6 U' i - ctx.setDebugInfo("error", e);+ \; H; e3 R+ \+ T( R k6 O K
- }
, L. R0 l! G6 y/ I/ {0 \9 O - }" S1 w, B1 ]) O' T2 N
- print("Thread end:" + id);
+ X! Y# M$ S, ^6 f" B. ^, `; `6 s! i - }
$ f6 s/ `" F" L h9 t% z/ _% ?* T0 I - let th = new Thread(run, "qiehuan");! Q* ^7 L7 T. {! b& d2 d+ D0 G
- th.start();1 Z6 Y n4 Z8 h0 u: i
- }: T* X% Y& m: p* n) `( `& d3 v/ u
- : Y8 V) z0 R' n8 L8 h( `8 L
- function render(ctx, state, entity) {! a5 G& y: |2 s% W' t. o; f
- state.f.tick();
: z+ F% L+ M! J& r: {4 o: n: V - }8 X ~$ h [; ^0 Z/ M0 i3 Q. d
' K g4 X( P* A( t- function dispose(ctx, state, entity) {
5 s& O& r( @5 T$ g3 S - print("Dispose");
/ k+ B7 z* e) {8 B5 K D - state.running = false;
4 V T) h7 V0 S8 O4 U1 O9 K; ` - state.f.close();
7 B) ]. B& V( v0 W! h - }+ w5 i9 k2 j8 }- n, \( y
- . q k4 G! B. K+ W/ p7 }
- function setComp(g, value) {
* |, {8 m9 s: W - g.setComposite(AlphaComposite.SrcOver.derive(value));9 I& ?, G3 c6 T
- }
复制代码
0 O8 `% ?- v: A$ f+ |9 c+ m- L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 V; U& k4 p
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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). v0 W& A8 Y, Y% h
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