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" |$ n3 Y0 K1 V, I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。
: A- F8 l* J" h0 p4 X2 e& U4 x8 k- importPackage (java.lang);
' T0 h: I: D% U - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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+ F* J8 g' _2 y1 I9 {) O M- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, w v- w% N" s* |0 M6 @, e; b
- 1 H( T1 b( C1 k
- function getW(str, font) {
- A, k [7 V- R( r3 Q! ~ - let frc = Resources.getFontRenderContext();; C4 t- _7 P6 b4 `, Y6 j1 `& u
- bounds = font.getStringBounds(str, frc);
" R! e: K9 \1 l/ |2 n) k - return Math.ceil(bounds.getWidth());
' z% a! }% y1 u/ B - }
8 D6 \( t- g8 F% v! q
# y! y& }; \ W1 n( {7 y2 n- da = (g) => {//底图绘制+ L" n" }+ K4 w. T9 {. F! C
- g.setColor(Color.BLACK);7 Z$ P; i- B5 E# a" z* K S* u
- g.fillRect(0, 0, 400, 400);/ D- N: i7 d) N5 ~$ y3 ?0 a
- }8 p) R6 ^9 }% t; u! P- e: v) o
* |7 k& b- y0 B* e* i9 i3 I- r- db = (g) => {//上层绘制
0 P' m9 S- g1 N5 l - g.setColor(Color.WHITE);
8 N5 G+ }1 t1 a, Q' L' T7 J$ v - g.fillRect(0, 0, 400, 400);' B/ f f" A5 I6 _+ b- r/ C
- g.setColor(Color.RED);! z! o: _% b5 f; e: B) P
- g.setFont(font0);" {3 T$ h- \8 L: f9 |
- let str = "晴纱是男娘";
1 V0 O ]) d: f( C* n - let ww = 400;
* P9 [6 c+ y% s4 u/ S - let w = getW(str, font0);5 `! G/ p& h) t9 ]
- g.drawString(str, ww / 2 - w / 2, 200);* K* F z; F8 c q4 _7 H9 Z5 Y
- }9 x" i/ t9 L+ t1 c* y' V" \
- I: G( O! c' {! h5 x
- const mat = new Matrices();: P& {- z. |, {% X
- mat.translate(0, 0.5, 0);* B" L5 m, }1 s o }( |- q
9 v" H% ]* P- D1 z- function create(ctx, state, entity) {
* D8 z3 f% n w1 |8 M - let info = {
* ^ C4 ?" d# s: G j3 w! Z8 O2 e% m$ x - ctx: ctx,( i- H0 @5 y" W5 t0 D' n1 _6 R
- isTrain: false,
; V+ R( g% H3 a9 m - matrices: [mat], Y4 u m4 [! A4 \; z( |/ C
- texture: [400, 400],9 r" L6 O$ I; @! K6 g! Y
- model: {
1 ^4 I* I+ p7 p: a* o3 R - renderType: "light",+ H; p8 \9 ]1 S2 Q Z- B* g Q2 ^
- size: [1, 1],2 w1 v- U( g$ s. U" V4 K1 `
- uvSize: [1, 1]
( R) w) J$ P5 p - }
# I! ~+ L! J: x- I! t" p - }
% f5 Y p: V- y - let f = new Face(info);( m6 G# c$ c5 o$ m5 ^: f
- state.f = f;
+ v; } W( T# [3 F$ Q5 t - # x* u1 H% \) x4 m4 C/ c0 c7 J
- let t = f.texture;
, x" K% w. ?# X' g - let g = t.graphics;2 P2 T. D$ J4 D3 @, O
- state.running = true;. g' [' G5 h7 Q! D; C
- let fps = 24;
2 r: ^" u/ G [: O) u9 e0 A* f3 ` - da(g);//绘制底图
& A; b' h2 t; M5 e4 h4 O0 n/ I5 U3 ` - t.upload();
: R6 n5 W& J# a' q5 S6 n - let k = 0;
" n# A" h H2 s' i* }/ R - let ti = Date.now();
6 }+ o2 V) m4 x) }% g+ a - let rt = 0;
/ `6 i0 K! `' J' ] - smooth = (k, v) => {// 平滑变化: K# l0 m9 H" r" k6 m' g( m$ o
- if (v > k) return k;) S/ U+ M* t( {6 }3 N
- if (k < 0) return 0;
# i, @; e. j! G, z3 L- l7 I - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
% A# {! U. R! b7 A+ q - }
" f* G; f- i+ @8 X - run = () => {// 新线程# U s5 `4 G" k) _
- let id = Thread.currentThread().getId();% ?( T: R- A# h4 j
- print("Thread start:" + id);
6 p+ @& w. l2 W6 {% \ - while (state.running) {
: s& g* }# _% H4 |5 P$ f - try {; C# r9 {0 q+ O% b" T6 W
- k += (Date.now() - ti) / 1000 * 0.2;. s s9 X$ j7 L4 z# b/ Z; s
- ti = Date.now();
: p- y( B3 V1 u& x* L - if (k > 1.5) {
b7 H+ G+ z! v$ L) }# X* u - k = 0;
. X' O! m y/ b! O: j3 S$ e! W- { - }
5 U- X& E- z/ v5 A" ]) x) R0 C7 A; O - setComp(g, 1);7 j- L) g% a, `
- da(g);
- P9 ^. X; f3 \# z3 A" o - let kk = smooth(1, k);//平滑切换透明度& U' j5 L& Y7 F5 f, Y
- setComp(g, kk);/ V# h# X! q9 {& I- {
- db(g);
" t2 f0 T( ]6 F) E5 s - t.upload();
2 k' F4 a, \$ \- X2 B/ H - ctx.setDebugInfo("rt" ,Date.now() - ti);
+ l0 C. b: A& x - ctx.setDebugInfo("k", k);- f. e6 i$ k' Z# L
- ctx.setDebugInfo("sm", kk);1 s; i/ ~* @/ H1 A$ s
- rt = Date.now() - ti;2 z8 b) s/ M0 {+ L& c
- Thread.sleep(ck(rt - 1000 / fps));0 b1 `" G5 o/ Y4 ]9 ]% `
- ctx.setDebugInfo("error", 0)& G4 ^' U, I/ L* h3 [0 E( T1 Y
- } catch (e) { y: x" E- [7 H( n
- ctx.setDebugInfo("error", e);
) g3 M9 m' a- k5 L - }+ r" A0 f$ g, u' X- Q( h
- }
. M/ n" ~1 q! k1 r0 D - print("Thread end:" + id);9 b7 W9 o, c0 E" n4 F
- }6 h8 w1 [& e" U% ?, }
- let th = new Thread(run, "qiehuan");6 x7 U. b; O" M8 x5 L
- th.start();0 y4 E, P" F. G9 E0 m5 l( ^, a
- }
0 ]( z6 V4 |& c+ U4 p$ Y$ C
. o! J' @) u" v$ t) T# ]6 B: M5 F- function render(ctx, state, entity) {# W( b/ A w8 s c9 x7 Q
- state.f.tick();- u& ^' B6 D/ Z$ y, A9 o
- }3 l8 d! h8 f% Y u- v2 F8 }5 ?4 L
& O. A; Z1 \2 T; i" k# I; b0 E; {, z- function dispose(ctx, state, entity) {
( `" h1 ^! e. a+ E) O0 K, z. M - print("Dispose");
% I+ y7 }( ^( ?" T7 [ - state.running = false;
& H9 m2 S. q, T- C7 B" b6 | W - state.f.close();, k- S/ b1 V! I2 B3 ]' O
- }# K! w" N( P: \# }/ z0 {
0 n- k! \# b; P3 O4 n2 u4 h( ~1 J- function setComp(g, value) {
/ Z* K- `; V: w5 o- {" r( R2 F - g.setComposite(AlphaComposite.SrcOver.derive(value));- a& `4 x6 X$ ~; W) t( I
- }
复制代码 ( j0 D; S: _- P6 X! r! O" u
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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( w& _, e' S3 D- 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)5 O% M$ k" H% t' a5 F% v
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