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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。 v- E$ n' z2 E8 m" g
- importPackage (java.lang);- b F, B2 g7 R: S" Z. b+ J
- importPackage (java.awt);0 i, n. q6 [9 }6 `: [- Q
: l( ]% R+ B$ p, z) H* y- include(Resources.id("mtrsteamloco:library/code/face.js"));! b% p1 {+ `5 C3 ^, X
- 3 {' x6 V/ M* {
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);$ i1 c0 j- X2 ?! ~2 E; x' L
" [ K6 S3 w0 n! F2 g- function getW(str, font) {
9 `6 K/ x* s( Y$ w+ f' C( c/ H# O - let frc = Resources.getFontRenderContext();0 L% w, m/ I# r: i5 w9 C
- bounds = font.getStringBounds(str, frc);
( D0 k# }8 ~) q6 L0 D, q1 g - return Math.ceil(bounds.getWidth());
: C( Z5 c2 l- ` - }* i2 c8 Z& ~# A. }
1 F1 M+ G+ ^9 j# F+ @$ @' o- da = (g) => {//底图绘制
% ~: U) |4 l) ]$ s0 |0 t - g.setColor(Color.BLACK);8 O* R. C$ p# Q% P9 j8 v
- g.fillRect(0, 0, 400, 400);
6 v1 t3 A9 j! m) W$ ~ - }3 `( t1 e+ O* x. Z: v
- ' k4 E/ \6 p: m9 G! B& ?
- db = (g) => {//上层绘制
' t+ q* x5 B/ |% K& i$ w - g.setColor(Color.WHITE);
2 m: \9 W6 `6 J4 r; d6 `& U/ R% a8 L - g.fillRect(0, 0, 400, 400);' j6 l9 r/ P2 q! V% O/ N
- g.setColor(Color.RED);7 J4 X6 w: [2 r5 r! m2 H1 v
- g.setFont(font0);
6 \ r' l4 p; @# l) s& Q/ K - let str = "晴纱是男娘";
8 t4 ~* [3 r# A) V. Q - let ww = 400;
2 n/ m0 m. s/ n' t8 r - let w = getW(str, font0);
# T" Z4 d: u4 O/ ^+ G$ \ ?. K5 D, w - g.drawString(str, ww / 2 - w / 2, 200);' G5 U7 B! G. A' |( T3 ? \
- }( E" i- z9 C! N( v
g% M. ]% P, x# L: z3 w) Y- const mat = new Matrices();" [( ~+ Z" \) s+ V. b9 ?/ ^' j
- mat.translate(0, 0.5, 0);
9 R) d" n6 _ d3 q8 o - 7 J+ h9 q, h+ D4 u2 c
- function create(ctx, state, entity) {
4 W- H# X+ ?) ~# K, A: G# i3 O - let info = {
: q& v) K6 {: D# i% P; F2 y& E6 s - ctx: ctx,' O R9 L5 v+ n7 O
- isTrain: false,
/ @8 X c- ^, \) f+ p5 ?; i, ^ - matrices: [mat]," }( l5 u3 u9 ^( V" r9 t6 w0 ~/ t
- texture: [400, 400],
/ u* }$ d+ ~& \ - model: {
\" K( w) r! Z' _0 C, z - renderType: "light",: c- i7 V# E- V5 q
- size: [1, 1],; b- q# Z5 Q5 F
- uvSize: [1, 1]3 _9 [: }/ m' }$ f9 V
- }
8 x: o! b3 x* F1 p - }
2 j4 \* p: ]+ |% Z' I0 X - let f = new Face(info);
8 Y5 ? _1 z9 O- r5 X! m - state.f = f;. k$ M, ^9 y% Y8 W
/ ?& t5 @! L6 _2 i; m& t0 t- let t = f.texture;# Z- U* U; b, ^, d
- let g = t.graphics;( r, i3 @/ i4 k( p1 E
- state.running = true;) H6 _- R( X& K& p& k4 W6 O3 J
- let fps = 24;
5 q2 W _/ y* \% k - da(g);//绘制底图/ T( N; S4 w% X! D/ r' u& O0 a
- t.upload();
8 y5 ?: O4 _8 J* _! Y! L - let k = 0;
$ J2 r w% h& F& Q8 E - let ti = Date.now();
& j7 w7 u, z0 T" j; h9 B - let rt = 0;
! H( Z. s! s/ }' \1 A - smooth = (k, v) => {// 平滑变化
# g. Z' G+ S0 m3 ? - if (v > k) return k;* X. z* j( Y4 h7 y9 J, f# [
- if (k < 0) return 0;/ J9 K5 U9 ^: H. ]
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;! e) t# w: l# ]" H; A; G
- }
' Q; I8 h D. L' `1 p- ^: i3 Z5 | - run = () => {// 新线程. e/ Q, N. L3 _) l" O" D' h
- let id = Thread.currentThread().getId();
8 {3 U' Y$ n; Q' h - print("Thread start:" + id);
( n& Y0 g; K5 J6 g" D, f) s- ] - while (state.running) {
# H: K, R& C5 M7 D - try {
9 x5 H5 V7 }. ]- b - k += (Date.now() - ti) / 1000 * 0.2;- i6 h5 i9 |7 J+ V
- ti = Date.now();6 _* D, h/ Y: x: X- b
- if (k > 1.5) {
( H% }' J% q& C! [( E8 N9 \4 z/ `% q - k = 0;
$ Y/ i5 C+ i9 }% S3 X - }
0 \$ {5 E( ^; f# b* c: L7 N$ \, M6 s - setComp(g, 1);( \; i' X' Q; v' E: s# [
- da(g);
. {8 E( a5 R ?, @. p - let kk = smooth(1, k);//平滑切换透明度
% L0 Z- L9 h! f( d2 @% k' v# x - setComp(g, kk);2 X! U2 u/ Z; U6 S& x
- db(g);4 l' x3 h/ h; Q/ a* U. T
- t.upload();
O4 }0 M, _$ M a& v" f8 o - ctx.setDebugInfo("rt" ,Date.now() - ti);
* P* d$ D' s5 L7 \4 _! \ - ctx.setDebugInfo("k", k);5 s. t. O& e3 r
- ctx.setDebugInfo("sm", kk);5 \8 D: i4 t- t- H6 L
- rt = Date.now() - ti;
- S3 L, ~1 H2 m6 b8 i - Thread.sleep(ck(rt - 1000 / fps));% J, D; O4 S8 L6 v
- ctx.setDebugInfo("error", 0)
7 [0 m! Z" P- O" q: l1 H! s - } catch (e) {
0 x# Q; Y' ], _ - ctx.setDebugInfo("error", e);/ W' f# B$ n$ ]% Z9 J) l$ d
- }
% A% Z7 s. ]7 k - }8 n) b2 w+ o a3 @2 }2 \
- print("Thread end:" + id);
) a" u- \4 p, w8 N( E, G: P5 ]3 i - }2 L4 F8 h: b: L( i7 ~# D, h
- let th = new Thread(run, "qiehuan");( ?$ A; v9 ]( Y3 @3 r! X
- th.start();
; J* w& `6 v' @" J - }( [' S W5 w0 h T
- " u2 G. f+ U% x2 {9 K
- function render(ctx, state, entity) {; u. `* T8 C; r$ q
- state.f.tick();- Z% {2 x" Q9 i
- }
- B8 } e P+ p3 ?# b$ w$ ` - . n0 y. C" l) N) R. W5 ^
- function dispose(ctx, state, entity) {
! I4 c$ a1 S8 i& S7 i - print("Dispose");# e9 L0 C5 d& E$ F9 }; K2 O
- state.running = false;
6 F% M! e, ?9 B1 `& D& K - state.f.close();% F4 l1 ?7 `8 C
- }
2 H6 V; R; ?/ ^1 _
" x- Q) G ~4 \! k1 @( A- function setComp(g, value) {6 u/ I, i' C$ G) G6 B4 u
- g.setComposite(AlphaComposite.SrcOver.derive(value));
+ b) ~ p" s% M3 }& { {6 i, _7 C - }
复制代码
, ~: S, y: Y/ @7 Y! Q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。" N# \7 R0 B# C
, ~4 P$ [' U$ B. m2 P
2 {, H! P. g6 V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 x1 D# k$ c4 d2 N1 Q' Q+ k; D" q4 X
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