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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。
+ ]# A$ q# o, X; l% t8 ]& i$ B' t- importPackage (java.lang);
6 ?) \4 N9 j" ]2 y% l7 u - importPackage (java.awt);+ j; @ R2 p" X9 f
j3 S: b8 h/ y& a& _- include(Resources.id("mtrsteamloco:library/code/face.js"));
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! W4 t0 [( e, O8 k! l- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);7 z( ]7 `2 I- W4 N/ D N& E$ p5 i
- * r8 p* c* H3 D; e+ |
- function getW(str, font) { [1 C+ D) j$ W( r
- let frc = Resources.getFontRenderContext();
( o1 `: z4 {" k& { - bounds = font.getStringBounds(str, frc);
- D1 v. J9 A( C3 Q8 [& @4 V - return Math.ceil(bounds.getWidth());
3 J: t" O4 T( i: u - }
/ v* F7 R4 J# Y. b3 k
. ^% O7 D. C, H+ @( }- da = (g) => {//底图绘制
9 m/ @$ ^: f" v# s8 F* Q' \ - g.setColor(Color.BLACK);
; \2 Y- G0 d6 t+ F8 f" f" ^ - g.fillRect(0, 0, 400, 400);
1 I2 x9 i+ r6 x/ B# \ - }
" `; d( x0 D5 B& A9 E( a' }6 j2 G0 j - ! e1 @: O5 K5 Q, \$ y
- db = (g) => {//上层绘制1 F) X0 t! [/ _! {! t9 X g
- g.setColor(Color.WHITE);2 i& n& i7 J( `" ~
- g.fillRect(0, 0, 400, 400);& C$ y& q! z# o# g; R! u
- g.setColor(Color.RED);
3 @* A$ F, N) k8 B - g.setFont(font0);+ v. C. v7 Y- f
- let str = "晴纱是男娘";
. U- ]( v0 D H/ W. ^% F+ U, j- c - let ww = 400;
9 K/ _# D, a% r) R - let w = getW(str, font0);! r! Y8 A6 n. J# O2 [
- g.drawString(str, ww / 2 - w / 2, 200);
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6 M4 x0 p" S" E0 E0 r; L! d% }1 ?3 g- const mat = new Matrices();: |2 b$ O: q8 K' ~- ~
- mat.translate(0, 0.5, 0);
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' E9 U$ J' t# x7 |8 D- function create(ctx, state, entity) {
+ t8 _6 ?8 W, U; C - let info = {
% _6 m8 `$ j7 K - ctx: ctx,
2 r; w# Z6 _. M# S- ?, { - isTrain: false,
; f- \, ?0 B$ ?- [6 Z- k/ m - matrices: [mat],
j4 f* B0 n' Y8 u - texture: [400, 400],. n4 G) v& P, T& h
- model: {
* c' b0 H6 w! B9 F V$ C% g - renderType: "light",
+ J1 l' [# L% P - size: [1, 1],0 X& f/ }0 J2 v s4 z
- uvSize: [1, 1]
- I; Y I# O q3 m - }! b2 B. i( v% t' a# P. I
- }; Y, j$ t D7 D" D9 U. r' v
- let f = new Face(info);: r& V/ F0 N5 W; f( ]# R9 W# K8 o% K
- state.f = f;) {; h* a- L) P5 W$ r( H/ Q+ q
- + o( D% s* Q M, E5 y1 Y8 m. b) g
- let t = f.texture;8 W8 h: h3 j/ Z
- let g = t.graphics;
0 z7 t* C C- s3 a2 W- h9 Q - state.running = true;
- g/ ]$ }- a z. O( O4 G1 C( C! C - let fps = 24;
$ p% C3 Y3 O7 f$ w! k8 N" e - da(g);//绘制底图
$ I9 p+ ` s6 W$ h9 |5 q - t.upload();
. i5 q* S& c' Y* x: s2 ? - let k = 0;
7 Y+ T: Z5 o9 t8 W7 ^- D - let ti = Date.now();9 y) E# r- G6 U
- let rt = 0;
* l9 Y( i! r2 k; i' J+ h - smooth = (k, v) => {// 平滑变化
, u, d) F5 C) s( e4 a6 E - if (v > k) return k;
7 V' Y" T0 n. R) |) m4 j6 T4 N4 z# @ - if (k < 0) return 0;
4 v! a+ Z7 ?- U8 Z - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
' a0 _ {0 {/ P( j9 _9 l - let id = Thread.currentThread().getId();
5 i, U9 z, f$ b; i3 |7 R& P0 h$ b - print("Thread start:" + id);2 [! V4 [" B- l1 m% q" B
- while (state.running) {2 b( u$ g5 m4 p- K6 A
- try {
+ R r8 s6 ^+ x3 U% @1 c3 O - k += (Date.now() - ti) / 1000 * 0.2;
g% m* J1 S6 j8 C$ t - ti = Date.now();- K7 i6 E, K! u- k/ J O+ I
- if (k > 1.5) {
" S, w, C# P0 ~+ ~ - k = 0;" k( U" x% m& i
- }2 R8 V* M3 I9 m8 O5 K8 o
- setComp(g, 1);5 _) R- W( @) N, g
- da(g);6 z& F8 E' ?! z: D
- let kk = smooth(1, k);//平滑切换透明度
& f8 x/ ]6 s# v0 |! Z. r - setComp(g, kk);( {5 d9 g, x% [/ N" _$ B4 \- y
- db(g);! h6 \9 M$ E, W' T. q9 D
- t.upload();1 e/ n4 D2 ~$ D, ?, R
- ctx.setDebugInfo("rt" ,Date.now() - ti);/ n. l" O a {+ @
- ctx.setDebugInfo("k", k);
- O$ u- P4 ^2 ^' }) | - ctx.setDebugInfo("sm", kk);. p! g- u# Q( I
- rt = Date.now() - ti; G; I8 W ?0 ?7 A6 ~$ `
- Thread.sleep(ck(rt - 1000 / fps));3 W) }! g1 b- f: `/ y# N
- ctx.setDebugInfo("error", 0). h$ D) X+ n/ L1 K! R" U
- } catch (e) {
7 L; ]- k5 {* p7 w$ d7 |" q d6 a - ctx.setDebugInfo("error", e);
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- }+ |" ^! n' O6 ?! C! F! V3 J
- print("Thread end:" + id);$ u2 m L8 g8 @
- }
% Q: o0 ?1 }. g - let th = new Thread(run, "qiehuan");
7 D; _1 A' Y3 p& t" i# z - th.start();# v- I% b1 U( v. r
- }- [* Q3 D6 z# K% @" L/ I
% m. L6 Q! @/ B) f/ z4 K) n- function render(ctx, state, entity) {+ A1 j0 a; u% \, |) { I4 U
- state.f.tick();
" m' B. q: B0 B. i Q y - }* K6 J: r( ^' _0 g" g
- $ H; y4 M A& Q' F. C
- function dispose(ctx, state, entity) {
( z" q U# V2 }1 I. k - print("Dispose");4 T& b* E( P8 x+ B% G
- state.running = false;
' |% p' z/ I8 L' U! S - state.f.close();
8 \3 l; ?* B' R; c! ~ - }. Q7 u8 h5 y; B9 t9 r8 M
- , m" w6 F; N! x/ [& _
- function setComp(g, value) {$ h+ {2 r1 Y: |8 W2 `
- g.setComposite(AlphaComposite.SrcOver.derive(value));
" T8 a0 P7 r* ^+ _% @ - }
复制代码
' |: V# S; u9 }; J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。- Z( t- k$ `' K/ f3 K4 P
0 }0 x& \, v- L4 N% J* R# [
/ ~' F8 F, p& F4 q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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