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8 f- L. A" a" e- X( ?) ?# Z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。* ? o/ i5 A$ P( d
- importPackage (java.lang);) S, I) _- T7 b6 E$ n% @
- importPackage (java.awt);, |! o m8 `8 l( G0 r! R/ O2 R
7 k% W" W7 E) B- include(Resources.id("mtrsteamloco:library/code/face.js"));
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' P# ?8 B% x7 y6 e) o- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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/ N. o6 h* P8 P2 |- function getW(str, font) {
; r U# s, O. i' k5 M - let frc = Resources.getFontRenderContext();% D# R4 J O0 e+ B2 z9 l3 {
- bounds = font.getStringBounds(str, frc);! U& J; U% a' B7 @+ c: a
- return Math.ceil(bounds.getWidth());& g+ | H# e$ _* i: m( k& Z( ]) m
- }
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- da = (g) => {//底图绘制* m$ ]8 @7 f3 { ]. h' r
- g.setColor(Color.BLACK);6 Q6 x8 `& y. ?3 [1 I5 C
- g.fillRect(0, 0, 400, 400);! R! L1 ~; m6 z- q0 F! j7 Q4 o
- }
- d5 r t/ X" W% e% ?5 c0 ^
, F0 ~0 q' Y9 @) d$ q. w- db = (g) => {//上层绘制* B* u2 e- P! f# F# ?' k9 b t
- g.setColor(Color.WHITE);) x; S; u ]% B$ Q7 a6 ` D7 w
- g.fillRect(0, 0, 400, 400);! J) O2 d& r- p/ [3 S
- g.setColor(Color.RED);
7 `: _! `: s) b+ P) t% S - g.setFont(font0);
5 p/ ^8 S# v* A* N0 h - let str = "晴纱是男娘";
4 l- s7 k& |4 @! `9 |7 g - let ww = 400;- y0 F c4 l+ G: i; p! r7 Y. [
- let w = getW(str, font0);
% x7 c( I, ^* |1 {8 o B0 n* A( w* \. C - g.drawString(str, ww / 2 - w / 2, 200);
3 q7 g. F: }. \: v& {( p - }
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- const mat = new Matrices();
; F! g) s1 X8 C" r5 w7 \6 X: J6 e3 ] - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {" m3 y; i4 K. N0 a' z
- let info = {
5 \! Z$ i( M" m! h- g - ctx: ctx,/ M6 c' h z' ^. {: d1 e1 ?
- isTrain: false,/ `6 s4 N) Z6 U, Z B2 r6 a/ C
- matrices: [mat],3 B& [/ U) F% U0 n
- texture: [400, 400],, f8 C. j# a' O" G: |
- model: {
/ ?0 U' I; j2 T# o/ |- _ - renderType: "light",' M/ U' n2 P! [& o! d
- size: [1, 1],+ u% n; k2 a9 r) V! i, J6 K6 L
- uvSize: [1, 1]4 p7 F! b; a# K0 V
- }
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- let f = new Face(info);. {0 T2 m" }/ U, k
- state.f = f;+ o9 t' W# o+ N3 D6 b. R
- ) z3 O: a+ N( ]; m, i
- let t = f.texture;
t8 D/ F( `$ A; p1 z - let g = t.graphics;4 M/ ^; ~1 v" N1 C9 f/ k. S# x
- state.running = true;6 v0 s8 |: L$ o4 V& t: A/ k" a
- let fps = 24;
& H' p* D/ D9 T! } - da(g);//绘制底图
$ [, s: b- c. k8 B - t.upload();2 O: V% M$ ]2 R; N
- let k = 0;
, | P: ~0 e; Z, `7 c4 S* r - let ti = Date.now();
; }) g7 F4 s- C% l7 y( t - let rt = 0;
; }& S* `* V) P- o, y0 _$ J/ `1 W - smooth = (k, v) => {// 平滑变化
5 N. s/ n, J% u/ | - if (v > k) return k;& {; p9 x0 v6 [: q+ X9 F2 f) i# ]
- if (k < 0) return 0;
* A ~) J: l- g( U: l - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
" _3 \# [& ^/ n0 p) V- e: O - }
1 l1 B8 c) C$ }4 V5 G - run = () => {// 新线程
. N- o& a# I2 b - let id = Thread.currentThread().getId();
1 X, c0 y% ~5 p7 `% {" l: ~ - print("Thread start:" + id);
1 [4 H' l3 A" V0 _1 o - while (state.running) {
( Y' V0 R9 y. f, m - try {
: j( O3 x. I0 O2 E; w! h - k += (Date.now() - ti) / 1000 * 0.2;
; g8 n5 i, \+ @* y1 k, K. o& D6 { - ti = Date.now();% L& o$ M. a' [( G- c, W
- if (k > 1.5) {5 x) U! G. F1 ~- \
- k = 0;+ s y2 Q/ U0 i6 a. O! y9 v
- }/ a0 @' F7 Y; ?' u/ W$ K+ v
- setComp(g, 1);
% }+ @+ E9 \1 K - da(g);" y( j! i8 |# d3 e& v. W9 R$ }
- let kk = smooth(1, k);//平滑切换透明度- ?) E, g/ _7 P- E% \, r
- setComp(g, kk);: C+ y: V" a+ J& c6 W1 e. C
- db(g);3 N; w% G# z) k: a0 K& S
- t.upload();; x: e: T- Z O" ]
- ctx.setDebugInfo("rt" ,Date.now() - ti);
6 o: M, V/ \; F! p - ctx.setDebugInfo("k", k);/ s4 k9 q; B/ X# u% l& o
- ctx.setDebugInfo("sm", kk);
- T7 D2 X* k, h* C$ B- X - rt = Date.now() - ti;4 O* ]* B& [% H0 L. p" x( R; ]- ~4 I
- Thread.sleep(ck(rt - 1000 / fps));+ Q) M9 E2 r; {1 `. O
- ctx.setDebugInfo("error", 0)
* A# J: S8 n' h+ J - } catch (e) {
4 F* x' E5 }9 p6 q& J* U$ M - ctx.setDebugInfo("error", e);
( f h1 B+ R4 A9 }5 x& X# i - }
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- print("Thread end:" + id);. _2 P0 B8 A' X9 P5 V0 B) {/ W
- }! ` a7 f7 w5 o% I% P, M
- let th = new Thread(run, "qiehuan");
: u' f+ ?' {0 E# f/ k1 K. b - th.start();2 B# K5 S# }% T* d4 G
- }
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- function render(ctx, state, entity) {
) B5 p. n8 s# `# R0 n& ? - state.f.tick();$ s% j2 ?. Y& O) b
- }8 T- w |) s# x8 y, R
4 `2 K7 ?- q. `4 ^- function dispose(ctx, state, entity) {
9 a7 U- o' L5 w6 M: w/ D0 x - print("Dispose");
6 p/ Q2 G1 F1 V- L, K0 H4 m6 I0 x ?" H - state.running = false;. q' X1 t- }+ B
- state.f.close();) x- q. ~; Y& K6 @! F
- }
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; [& n! D; G; b" Q- function setComp(g, value) {
0 h' v& g3 C! \/ F' N - g.setComposite(AlphaComposite.SrcOver.derive(value));
1 M" W5 \; e. X" O% w/ w( a8 T+ Y - }
复制代码
6 X* i1 I$ k( U& k! K# E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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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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