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/ o1 D6 G( g+ m7 H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。
( y4 k: X; J2 D# B. I- importPackage (java.lang);% u# m$ ~( [' N. {% k
- importPackage (java.awt);3 m) T% e, ^. w# Y w
; h, `# [& S: q- include(Resources.id("mtrsteamloco:library/code/face.js"));/ y8 Q8 _6 u# g4 D6 R0 v# c
- : F+ U, Y" Z: X- }- O% W$ z
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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. ?/ t8 H4 q$ C9 H& e. j- function getW(str, font) {
0 F' F6 k* G2 Z& k) O: l' S - let frc = Resources.getFontRenderContext();, G8 I/ j* D, X3 \3 L2 I& S: d
- bounds = font.getStringBounds(str, frc);
; M- {0 A4 m0 G# C7 }9 {& Z5 C - return Math.ceil(bounds.getWidth());
' N) i+ n8 t) @/ T; h - }
& g) `5 Z( e4 k" q0 t5 J. B7 d - . Y5 Z4 A+ h1 L" B. x I% T
- da = (g) => {//底图绘制0 @/ R: D1 m2 _. B5 r4 i
- g.setColor(Color.BLACK);, ^) n- N4 h3 a2 K) ^* n" D
- g.fillRect(0, 0, 400, 400);
$ z& k7 I) F- l+ } - }
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- db = (g) => {//上层绘制
6 z& y6 ] \- m5 `6 L2 m/ c( x - g.setColor(Color.WHITE);
7 |7 C+ P* C' {& ~' P. r - g.fillRect(0, 0, 400, 400);! W1 X, N! o5 P5 A0 Q* N+ n
- g.setColor(Color.RED);8 D, l+ Q+ q a1 H% Z' |+ N4 K% B
- g.setFont(font0);
1 g# m: D( [& r" u2 d' p - let str = "晴纱是男娘";) u2 n1 j+ L& A, d4 g% I7 R r
- let ww = 400;
" }9 T j, q) H& L1 V; ]# K! P( V/ { - let w = getW(str, font0);: Y' }! Y' j# o3 L5 p# i- J! Y" o
- g.drawString(str, ww / 2 - w / 2, 200);
- `' ~# H$ |) O- I; C4 r- N0 q - }
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- const mat = new Matrices();( o( ]) T0 H* s$ T& b6 U
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
H( B' b, Y4 D7 K7 {& v - let info = {) e. z1 _3 x# n$ j2 Q
- ctx: ctx,0 r! v" X5 O8 N2 z; ?! V4 F5 B
- isTrain: false,9 `$ r6 I% r; F- h/ Y
- matrices: [mat],
0 x |$ `9 K2 f5 F% i - texture: [400, 400],$ L, }/ O' O9 O0 \& v
- model: {
* L8 F( G* A j+ M* l1 } - renderType: "light",7 p) w8 i1 J# d" O) p
- size: [1, 1],' \8 D* e$ c1 J: X
- uvSize: [1, 1]( I# q8 F" \/ j! h0 l* W
- }
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- let f = new Face(info);
, c2 E" U6 W" [" Z0 R! }$ I - state.f = f;
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/ f" Y! y9 @$ x" f. X9 z- let t = f.texture;2 t- W( @. D! f5 e7 m: e/ R
- let g = t.graphics;% F2 ~2 b* {/ |' r) w$ P
- state.running = true;
! X# {: }; T5 d4 p, i, L - let fps = 24;
7 o `5 q" ]! p+ O0 {, g! |; e - da(g);//绘制底图
0 k* ]2 ?% x! O% |7 x - t.upload();
' L& x& ?6 x1 L% [5 z# D \ - let k = 0;8 D# W( ^$ q4 G& d
- let ti = Date.now();
[( Y& Q E; |# R - let rt = 0;0 o& a" B4 k8 J/ s* E
- smooth = (k, v) => {// 平滑变化
0 Q8 y! ]( F0 G$ ^ - if (v > k) return k;# |; t5 j6 N8 a7 i& h9 w4 R
- if (k < 0) return 0;
. s8 Q; n/ F/ ]( { u0 b; v - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
3 x' l; f) m+ ]- S$ Z" B) N8 m) e* E; n - }
6 E0 i7 `/ d: ?$ c0 z# \1 V4 | - run = () => {// 新线程% I0 p+ }0 T6 R# b
- let id = Thread.currentThread().getId();
+ }' z8 L& K8 G/ u& ` - print("Thread start:" + id);
4 T& S( H( c9 G4 |+ n; e# e2 Q - while (state.running) {3 `" l5 j1 c6 x; o
- try {
6 y" n+ a" Q2 P) R - k += (Date.now() - ti) / 1000 * 0.2;+ Y; p0 ^4 L3 K1 N
- ti = Date.now();0 m. E# J/ q6 O3 ^6 L
- if (k > 1.5) {
1 y5 t4 P7 G0 @ - k = 0;& h0 K, ^8 [+ E' s6 u0 j3 r6 p" N4 E( I
- }
4 m ?$ z* l, `; [ - setComp(g, 1);) `8 i- Y, t+ b+ L3 {
- da(g);# ?: v. n$ |2 t. n F5 L; _; K4 v0 P
- let kk = smooth(1, k);//平滑切换透明度, S7 A( Z/ d) ^# {; L
- setComp(g, kk);
3 e, ]( ]9 e1 t. b- C: \2 \ - db(g);
k% l& g: G' X" G$ s" t$ F - t.upload();
: K5 P5 [7 W8 ~6 O* L/ _" U6 f4 f - ctx.setDebugInfo("rt" ,Date.now() - ti);* J1 z( \* J6 z, t8 r: G2 O8 s! j
- ctx.setDebugInfo("k", k); b/ R7 B/ P8 h0 K3 u
- ctx.setDebugInfo("sm", kk);! h- M$ ?) @3 w E
- rt = Date.now() - ti;
) w% L& X1 C9 I, g! X3 } - Thread.sleep(ck(rt - 1000 / fps));
* W2 O* l9 T# ]8 z9 p9 b3 w- u - ctx.setDebugInfo("error", 0)
+ }/ A& ?" ]4 G+ u' G: N- p - } catch (e) {6 Z) [0 ?# ^3 i" m% t
- ctx.setDebugInfo("error", e);
9 D7 H4 N( k8 G4 t - }
8 \( j0 ^4 k# W! R - }
b% u" o) Y% l( f5 M5 \* T - print("Thread end:" + id);4 S0 D+ B& J& u* a2 x
- }* F& B6 I2 w" ?
- let th = new Thread(run, "qiehuan");
! z6 m& {$ S. ]' X( k2 r, ` - th.start();9 J% @! }7 b8 W; w" K% T$ _
- }
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- function render(ctx, state, entity) {
e. L9 [; u) X8 G3 z3 Z9 C - state.f.tick();/ q2 P7 s1 ~ x A3 C+ p" f
- }
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3 N6 _4 a( ]6 E3 O# ^& |- function dispose(ctx, state, entity) {
3 _; C; V2 R% [' k4 U, q - print("Dispose");) S8 v- Q" b" L$ h( @* m' X
- state.running = false;
5 \9 u u# w$ y) C! _+ D - state.f.close();; H( M- l6 B w) v
- }
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- function setComp(g, value) {* K( k' k ~3 [/ Z+ a, c( C
- g.setComposite(AlphaComposite.SrcOver.derive(value));
6 Q3 H1 K7 I+ L( k - }
复制代码 $ @8 D6 Y4 `6 U- u6 L3 ]( p
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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; F' f7 N$ J0 r# X顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)6 \' p' G* r1 l% x" C$ ^; B; L+ l
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