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" e. [# c8 e) ^1 E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。7 @8 ^& A. y; ]
- importPackage (java.lang);2 L, B& C, n5 X9 S: \1 @
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" ~& _8 b2 q4 _
7 ]# B# D+ _2 [2 h4 B& Z" R$ t- function getW(str, font) {. |( |5 ?8 {: v% n& E& f1 o
- let frc = Resources.getFontRenderContext();
- F7 a& y( e T: r( m2 ] - bounds = font.getStringBounds(str, frc);$ y0 g$ n! n0 n5 ^
- return Math.ceil(bounds.getWidth());$ n6 j! p+ X) ^8 J! ?" D
- }5 C+ g0 n6 f8 _( ^; A
8 q9 i# y1 @6 R4 I& ?7 ~+ u' u- da = (g) => {//底图绘制
; O v5 O: q4 z% h; s - g.setColor(Color.BLACK);; e; ?3 g6 i9 _ X
- g.fillRect(0, 0, 400, 400);
$ K7 g3 U# l3 m7 @8 H - }( L0 a1 z; o- u# l3 G$ T" X# a
9 X# B! ~5 R' r# a- db = (g) => {//上层绘制" m' m7 {/ _) d4 {+ m( H
- g.setColor(Color.WHITE);3 J. H: [( b' G( I5 q
- g.fillRect(0, 0, 400, 400);
" N3 p6 R0 `: ~ N& R$ ~ - g.setColor(Color.RED);
% F- J$ r5 m9 C. i0 ?2 v" K. Y4 l8 _% \; Q: d - g.setFont(font0);
" R; Y8 l+ W1 l; @: y7 ^ - let str = "晴纱是男娘";
3 A# ~& v6 d0 b# m) ?$ u7 M - let ww = 400;- v8 A0 u7 c. T* ^! T. y6 d6 a
- let w = getW(str, font0);
2 ~# v- d8 K' g" Z+ @ - g.drawString(str, ww / 2 - w / 2, 200);
' ^ j3 O; \/ o: s: s - }
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- const mat = new Matrices();
1 {" V) @- k. h. F - mat.translate(0, 0.5, 0);
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7 T' s$ ]6 Z$ W5 Y2 j7 E' y- function create(ctx, state, entity) {5 Y! W) D ]$ z' X3 J/ T! s5 h' @. d- D
- let info = {# D' @' A* W7 F( a( W, u- f
- ctx: ctx," j7 `# T1 Y# m0 [9 V& L
- isTrain: false,, M& y, M- a6 w% `5 Y3 y; V7 V
- matrices: [mat],( S* z6 X0 F8 U5 r
- texture: [400, 400],
3 H; O5 g1 X' X- T. F+ p( ? - model: {
4 t1 m; o) L0 Z/ N - renderType: "light",/ r) {7 q. {! G
- size: [1, 1],$ G* w$ L6 `, T8 g
- uvSize: [1, 1]) o) k' C' n( U/ ^ [
- }% Y0 |, M, l% j
- }
; [0 [8 C7 M0 a0 f - let f = new Face(info);
, S7 Z: O, v/ \! c% s5 _/ Q" Y - state.f = f;
+ x( W1 |' E5 p: J7 b - & _- x) Y/ F+ k4 }( f
- let t = f.texture;1 i. ~4 P( b) k$ u2 M5 Y& X" R
- let g = t.graphics;
( w5 G, g, {3 c9 y/ }+ Z - state.running = true;
$ c: ]# Y9 a- x5 X6 ^ - let fps = 24;$ p8 P* ?$ j; n+ `# j ?* a, N
- da(g);//绘制底图" A7 t9 ~0 n. e9 {$ s# F. Y3 U3 |; X2 }
- t.upload();% t, H+ p) p* ^- l( j+ O9 D$ B `
- let k = 0;% O2 p9 |) N* H6 z4 ]. C4 Q
- let ti = Date.now();3 w" ^% ~5 Y. Q* Q
- let rt = 0;1 K; v; J. N1 Z2 t# A/ y
- smooth = (k, v) => {// 平滑变化
" Z: y* x" X: k) I2 U - if (v > k) return k;" U3 C% j& q4 L4 G
- if (k < 0) return 0;5 J0 @* F3 ?( i+ M
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! T R+ a% |! h - }
, v( e8 n4 T, @ - run = () => {// 新线程
5 y- @& Q- N8 I0 v& T - let id = Thread.currentThread().getId();: ?* \. U Z4 s: h& q
- print("Thread start:" + id);$ T j. X% \. B% n) u" ^
- while (state.running) {
) p$ f% i7 D7 S8 r( p/ }$ ` - try {/ m( m; e8 V- n! ^
- k += (Date.now() - ti) / 1000 * 0.2;' z j+ |/ |% V8 }) F0 j; y
- ti = Date.now();0 J8 N6 P/ v* s( ]( K; F
- if (k > 1.5) {
! Z- K9 h4 |# y( G' a. X - k = 0;
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- setComp(g, 1);# `+ U3 y% _0 J2 M* w, k
- da(g);5 D6 f% f# K5 ^( {( W
- let kk = smooth(1, k);//平滑切换透明度
% A$ {; W% k- ~: S - setComp(g, kk);( T5 z; X/ M4 g; h3 u- U
- db(g);
' r& ~% _, C c& ]! B. a) {5 ]- z - t.upload();0 T4 l0 i& r0 ^5 V: f5 s
- ctx.setDebugInfo("rt" ,Date.now() - ti);
5 T. H$ D) x, M S; E - ctx.setDebugInfo("k", k);
0 s7 d2 o1 n" x/ c% [6 q - ctx.setDebugInfo("sm", kk);
7 t1 n* @0 v. |" W# F - rt = Date.now() - ti;% h$ K7 J6 W9 E! r# i, W
- Thread.sleep(ck(rt - 1000 / fps));' V3 v! q, I- d. ~0 C
- ctx.setDebugInfo("error", 0)
' R+ t5 s, G) j* [; m# |8 `/ b - } catch (e) {0 i. Y% W h2 s0 T+ K' \
- ctx.setDebugInfo("error", e);
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- }, j* t1 h* ]( \) p
- print("Thread end:" + id);! P: l5 }( n2 Z; E1 L
- }
M5 {( ?' F- Z$ C) a! |* ^( X - let th = new Thread(run, "qiehuan");' H0 {, o6 w6 h4 q
- th.start();
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- 7 H% F$ p7 ]- t$ k$ b
- function render(ctx, state, entity) {
* O( B( E1 g$ m( R5 w* K4 ]4 v# ? - state.f.tick(); \5 Z0 D! A# a; V
- }4 l" q! a/ o3 Y1 h
+ E+ K9 s! J7 R" {; F# B- function dispose(ctx, state, entity) {
' r; n4 w: O8 o - print("Dispose");
$ Y! ]' y, N! W/ ~ - state.running = false;5 \" r2 m& x e Z1 X% H( ~7 Q
- state.f.close();
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* V `- D) }* s# D8 O! J2 P; j3 E% e6 e- function setComp(g, value) {
# i0 ^/ [0 F8 M) ? - g.setComposite(AlphaComposite.SrcOver.derive(value));
4 n% i9 S" U! E h9 E - }
复制代码 4 V: { w i* ~
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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. `7 r3 K; n; e0 R/ ~+ w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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