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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。
6 i$ s: I9 b7 \$ n- importPackage (java.lang);
2 U+ h( s" p6 [+ g - importPackage (java.awt);
- n0 z" U3 w4 j4 s$ h
' G9 u) X$ x6 B1 J0 J4 U- include(Resources.id("mtrsteamloco:library/code/face.js"));3 C. C4 X3 ^2 g u
6 s0 h ~* w2 a P) H/ ^, `- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);0 v! W, y1 ~3 d2 ]. R
6 t! j8 k1 D' H2 H% l" I( n9 z7 Z- function getW(str, font) {
' ?7 z4 A w, T3 O0 _ - let frc = Resources.getFontRenderContext();
* Y8 z6 B# h5 V3 w0 p3 H - bounds = font.getStringBounds(str, frc);! j# @. {. o4 r' h3 V
- return Math.ceil(bounds.getWidth());
. o/ v, A# l" P* J" q& `4 z - }6 X4 O0 a; Q' ?, }4 A: N( D2 | }
- / x* A9 ~" c s. K& Q! f: ?
- da = (g) => {//底图绘制
+ _% `3 Y& `1 ? p8 | - g.setColor(Color.BLACK);* s. H. y* {" [, N3 ~
- g.fillRect(0, 0, 400, 400);
K8 q3 d! } g, m" u& @- Q - }* L$ R6 i5 F$ x3 Z5 K
8 m. h3 e( @) T- db = (g) => {//上层绘制0 e' ]5 V. r8 {3 g- p2 Z
- g.setColor(Color.WHITE);
* K; e! O1 d# _3 y7 X0 d - g.fillRect(0, 0, 400, 400);
- N N2 k* Y- Y - g.setColor(Color.RED);, A; m+ v @% x5 f8 e5 x/ m ]
- g.setFont(font0);' M* I9 L& F; D
- let str = "晴纱是男娘";6 b5 g8 _$ a6 @9 y! D
- let ww = 400;
' b' Y$ V7 D2 A0 U - let w = getW(str, font0);
5 {( h, w! R" f# u - g.drawString(str, ww / 2 - w / 2, 200);# `* l+ |3 y [" q
- }
2 r: c2 R. T9 U% e8 e- B" U
4 l* l* `1 G; m9 t( e' V- const mat = new Matrices();
, c X' L+ Z# K' o3 ]* P/ j - mat.translate(0, 0.5, 0);
9 s4 J/ y& _* H. N/ }/ f4 o6 T0 v
_ C1 |: T0 k) X. p- z$ j- B- function create(ctx, state, entity) {) T2 v9 J: f' T' K( @9 h
- let info = {
8 f) \" E. l! I) F) ]: q - ctx: ctx,
( h4 }* @( t; t2 {& F) ~ - isTrain: false,0 \# G+ [! x* a* }6 T
- matrices: [mat],
9 G: a1 i7 X. M& I2 m - texture: [400, 400],
5 K$ U' s: ?9 |8 K' s8 ~4 S - model: {9 C" T$ x, w4 v8 f
- renderType: "light",
/ ] d+ S) p9 D - size: [1, 1],
: C7 \0 m6 ^! P - uvSize: [1, 1]/ u% D6 D' Q" o' O
- }7 }- T4 O; E. |6 p$ a X
- }, y; h* W4 n0 L& X
- let f = new Face(info);
! Z3 Y2 B5 w) p( Z0 I% C4 m - state.f = f;& ^) q8 |* F9 \; x' M
- , q. ^9 F; b' J' E+ h% W: J2 i9 C
- let t = f.texture;
$ c* {0 U; |# m+ b0 W - let g = t.graphics;( i' p! T0 [9 o2 y8 @: t$ m
- state.running = true;
4 c0 E' Q( n$ w- `' q( X - let fps = 24;" k' D: t% y4 [
- da(g);//绘制底图 S1 r( N+ H! X1 s9 q
- t.upload();
' P; h, P1 b6 g3 k( K - let k = 0;
( ~. u! c0 w8 ?8 B7 \ - let ti = Date.now();! x6 k6 d; M, T l) ]9 P
- let rt = 0;5 e6 I9 V' x( k1 F. J z
- smooth = (k, v) => {// 平滑变化! J5 n$ f7 ]4 k# V
- if (v > k) return k;
' U- N2 a( l1 X* z2 D; _# D+ N( I6 J- T$ w - if (k < 0) return 0;+ z2 h" H; r3 o5 `* w
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;+ l4 S& L, I7 n t3 L7 h7 D6 H4 F4 l
- }
) \4 v* F- y/ A9 O; C - run = () => {// 新线程
+ F& ]# y. O' j3 d$ k - let id = Thread.currentThread().getId();
7 p! r+ X7 s0 O - print("Thread start:" + id);
# y E' H9 ~( O! ~ o, T p - while (state.running) {
L+ o; @. R( x. l/ @ - try {
) i. `3 u8 ?8 V$ }" m) v# X - k += (Date.now() - ti) / 1000 * 0.2;# _$ l9 m# `; H
- ti = Date.now();3 _' b: O2 G4 C
- if (k > 1.5) {
4 A# C$ Z" ]* | s - k = 0;
. S) j- g9 I+ S3 U - }
0 ^. J' k! ^. A: s& p - setComp(g, 1);" z3 F9 ^3 X- ~# z& S; a/ \8 v
- da(g);* ^! `$ C$ ]5 e9 z0 V
- let kk = smooth(1, k);//平滑切换透明度
. d& |7 }# z* a7 V$ W6 g - setComp(g, kk);
* L" o. F: f U# X - db(g);$ E: s9 A# H: N+ U- g# D7 K
- t.upload();, t/ x9 D: y6 h1 @
- ctx.setDebugInfo("rt" ,Date.now() - ti);
- Z# c- f$ F; w6 E9 F5 C - ctx.setDebugInfo("k", k);- P0 H& c7 [. q; L4 x) A
- ctx.setDebugInfo("sm", kk);; V/ g3 O: G3 z4 g9 a2 f3 |: L
- rt = Date.now() - ti;( R, a* s) s6 a' ]! h9 S1 d% @
- Thread.sleep(ck(rt - 1000 / fps));
9 W3 x9 }6 @0 H& i _ - ctx.setDebugInfo("error", 0)
3 E6 e( I( c u - } catch (e) {7 q+ q* W: }& G: _: [2 J' e
- ctx.setDebugInfo("error", e);1 U- `! K n+ ~& e* K6 E3 k' y, I3 ?
- }
7 X- X1 T1 C8 Z6 E: G - }
- a$ B4 w9 j& G7 h( [6 b9 @6 _ - print("Thread end:" + id);
1 R, p. ^0 l: _4 ^1 K - }3 k8 w: o! T, ]! U
- let th = new Thread(run, "qiehuan");' A: V5 [* |' I- Q- y; \
- th.start();2 l% D3 U1 R0 w8 m
- }& E4 w* Y% Z; E ]& D8 A
" j# \3 z0 i- V: d8 P1 a& S7 N$ W- function render(ctx, state, entity) {) w r+ V- w: g; n# P) v
- state.f.tick();; W# g' w6 E) f) F5 F
- }% u. J( k+ \* L0 W, m
- $ a. D1 ^, D$ U' N
- function dispose(ctx, state, entity) {
+ m Z P8 M& e% k - print("Dispose");( P& F) V( U, U0 _; k* p- m# t
- state.running = false;+ @1 b0 C7 y* h1 [* A2 M$ |
- state.f.close();
5 l1 i F( ]6 D3 u3 g - }
7 p1 X9 R d V1 k. p5 U/ w
% ?3 H' c. t. }0 G( ?- function setComp(g, value) {
6 z% V7 r( u% q. k; v - g.setComposite(AlphaComposite.SrcOver.derive(value));! Y2 k$ g8 I6 v# u
- }
复制代码 1 V; c, c7 r5 L5 C
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。3 T: d- b. q1 F1 R; a) k6 k. m
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, ?1 C2 W. y+ l3 U: ?顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)3 u _, z- O0 G7 o# `. h/ f
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