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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。* j% a; O7 [$ H) L) g r! q
- importPackage (java.lang);
( ~5 _/ p- b' O6 q2 a6 T - importPackage (java.awt);. l; g- p) e2 W& e/ G1 b! f1 \5 v; Q
0 t( R- o% y. N- include(Resources.id("mtrsteamloco:library/code/face.js"));# U5 _0 x- M0 b1 |4 T
: I- u- z$ Y" O9 J. z- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {4 f9 W/ c! R" I( a: J
- let frc = Resources.getFontRenderContext();# i" _! v- F4 M7 A; b* V
- bounds = font.getStringBounds(str, frc);0 \ Q& P5 P/ B5 x Y7 E
- return Math.ceil(bounds.getWidth());# V" x5 F, \$ m- V$ n% t
- }
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- da = (g) => {//底图绘制1 L" Z5 n0 a6 A0 [. E" X
- g.setColor(Color.BLACK);5 d8 l2 A1 B9 ?3 _1 p3 L) H5 t
- g.fillRect(0, 0, 400, 400);
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- : C. D% o% P1 Y, }- _0 k
- db = (g) => {//上层绘制* `0 y5 Q9 n3 s; P% y
- g.setColor(Color.WHITE);
9 j4 Y8 ~4 Z" ^, h/ }! g - g.fillRect(0, 0, 400, 400);* B2 `2 _: X! o# ] ~
- g.setColor(Color.RED);
- i9 F. E2 ~' j& I6 u* B' L& t: s5 v - g.setFont(font0);. d8 @* T0 n+ q$ E/ X+ t3 ]
- let str = "晴纱是男娘"; ~3 B" _, N* o/ I0 q3 d
- let ww = 400;/ e8 X% o- E q" g
- let w = getW(str, font0);! g& P: F. c' h5 @& M3 [# D
- g.drawString(str, ww / 2 - w / 2, 200);; `6 Q; f2 @ [: I
- }! A6 a; L, O& {* ~4 a
- : a2 O8 u: D+ e* D1 y C7 ~8 o
- const mat = new Matrices();
8 Q- F" z! [7 t4 e% S3 H& L4 n - mat.translate(0, 0.5, 0);( e: c9 l2 J9 U% Y( _
; K4 s7 `# L, E+ n4 {* R+ W5 L! r- [- function create(ctx, state, entity) {
7 n& ~+ C7 s# v) O - let info = {
0 ]# o0 O( k9 n3 _! t/ k2 R - ctx: ctx,
3 {7 w4 y# f6 o4 {3 [0 T - isTrain: false,& C E1 n$ e% C
- matrices: [mat],
, r9 p, z! h; T0 D: D- i; S8 M - texture: [400, 400],6 z- d7 z( b0 E; B
- model: {/ Z4 ?' H/ ?1 E9 w* L: m3 c1 ~9 d
- renderType: "light",2 Q: W P9 D& [' @+ b" O: q
- size: [1, 1],
1 Z+ U7 n1 o! o" a& i( x - uvSize: [1, 1]4 A7 F% Z' i- u
- }
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" L0 T2 l& w% h1 j - let f = new Face(info);! _3 Y* F, e& h3 E% u; m
- state.f = f;0 L: n) r% a; R0 o9 ?8 e% `
- 7 ]0 `5 q# B: z( |( O5 E' P( @
- let t = f.texture;
/ v# a0 t7 D& f" R - let g = t.graphics;
: d% \* }4 x; p. g' P: H - state.running = true;0 t7 S' b' h1 S# m4 B
- let fps = 24;' f h3 z" i; O S
- da(g);//绘制底图
! ~5 S7 s0 B9 D( |9 f- M - t.upload();
3 ?7 L6 c" b' r8 u3 |, c9 z - let k = 0;7 M( r2 }* t( Q
- let ti = Date.now();& s/ b8 h* _9 W+ a- y4 `
- let rt = 0;) V- o3 @* W3 t; `+ M
- smooth = (k, v) => {// 平滑变化
5 s9 D- ^% d. W5 T, _% S - if (v > k) return k;+ @2 Z9 g3 Z3 m& c& b8 X) _' w" O
- if (k < 0) return 0;
* j, r$ |: m- V" i5 S - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
8 R$ E- G. s7 H; A - }
/ _( R7 H" ~+ s! @; V$ m. k" | - run = () => {// 新线程
+ V3 I/ m: p, g/ h* N4 t - let id = Thread.currentThread().getId();
; r: P7 K( [, j+ F( ~7 I* O - print("Thread start:" + id);
& c# n6 ~4 l6 a7 a6 @% {( V$ Q - while (state.running) {
$ C$ B3 W' w- E# S. ^: k - try {
! R( U4 J8 a: u4 I3 w, h* b - k += (Date.now() - ti) / 1000 * 0.2;+ s. w) o) P2 g. b, a- d: N2 r& s
- ti = Date.now();) g. f9 j6 s5 D! a, h9 _7 m
- if (k > 1.5) {. M" _$ ^! f& h' f# {; ?
- k = 0; n7 a; }) ?; ?9 \7 E& z" ?
- }
7 u0 C% w8 T" k0 e8 f# k - setComp(g, 1);
5 ?5 i1 N! f H - da(g);
4 [9 j$ t- o1 B' }. r0 z - let kk = smooth(1, k);//平滑切换透明度
$ e1 V9 j" T4 \9 H2 N8 h - setComp(g, kk);6 z) p h2 n1 r; P) A4 P: ^( L7 o
- db(g);
. W0 Z; F* |, P$ P6 i - t.upload();
- A/ _, r; R9 H9 W/ V) } - ctx.setDebugInfo("rt" ,Date.now() - ti);
% x; b8 l8 p& E$ E* U - ctx.setDebugInfo("k", k);
1 o/ u; f; s# X! w5 }: d) U6 J4 s - ctx.setDebugInfo("sm", kk);
/ _) n2 Z& v% v- O1 c - rt = Date.now() - ti;) H# y6 Z& F7 S: h
- Thread.sleep(ck(rt - 1000 / fps));& \5 r& y6 ?: f) W
- ctx.setDebugInfo("error", 0)5 a" U: k3 Q7 N! L9 s3 L0 a( V
- } catch (e) {' ?# U/ _* T C/ T* R# p3 a4 `1 J
- ctx.setDebugInfo("error", e);
/ F) S3 Y7 A0 _( r( S* B: T - }
5 J% H, [( [& f( O) ?* [ - }
! `# a; z0 y$ h, W. I - print("Thread end:" + id);
$ _* J1 ^! j+ c0 L - }
3 F6 T* s2 _( }; q. O - let th = new Thread(run, "qiehuan");
+ `3 o% ]& L8 @* i, m - th.start();. i2 {. o6 v1 K! @( W) G
- }4 d4 K% \3 w% P5 }( A( Y+ |0 E
- 0 s4 `' t; ^/ u8 ~) f0 f6 J, f
- function render(ctx, state, entity) {
9 a" M$ O: b, s - state.f.tick();
. E5 x) A+ }; K& S7 w7 c; ~( v - }
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% z" A$ r# k: b; q$ |" w& v, a- function dispose(ctx, state, entity) {1 c" ]: y# B/ P1 G& V
- print("Dispose");
% a. N& \" _- ?. l q2 C u - state.running = false;
$ j$ W! j6 z% C4 k5 C8 k - state.f.close();
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- / B0 p" `/ W1 B& t& q6 \0 v% C
- function setComp(g, value) {9 f9 x, C8 @* o/ g4 D6 Q' z5 y" b
- g.setComposite(AlphaComposite.SrcOver.derive(value)); d9 P- K1 j: z/ O6 {: W1 l
- }
复制代码 & S" w3 A5 Z! D* E2 f% E4 G' K. \
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)8 s2 J+ s5 I7 F" Y' M- b% _2 k& M
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