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% u- q: ?1 Y' O; M1 X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。( K5 h6 p3 S8 d9 `) Y
- importPackage (java.lang);8 _0 j' R2 \; i7 \
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));/ T! p2 t+ s9 I0 f
- X: ^1 J3 k. C. v' }/ v' r# L$ I
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);' ~% [6 ]. f& J. U2 Q4 x- L9 U7 c
: w" J5 d3 u: q- X- function getW(str, font) {- b3 j3 z- X% u- G4 _4 {9 p% v
- let frc = Resources.getFontRenderContext();
/ H [* ^( y% i: I, n6 z - bounds = font.getStringBounds(str, frc);# O m i- D( b. G' w: ^2 c
- return Math.ceil(bounds.getWidth());
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' _& {) ^ \" F6 v/ m8 h) R1 W, X- da = (g) => {//底图绘制
3 y& h; W$ A2 H0 A" h" ^ - g.setColor(Color.BLACK);
+ L6 }; x% [1 L3 [ - g.fillRect(0, 0, 400, 400);
# k. B/ z/ i3 n* G C/ p# I - }$ t, G% ~+ N8 |& W
8 z1 Z: u8 S& ~( {7 Q- db = (g) => {//上层绘制/ R3 A% _( W" k7 g8 m
- g.setColor(Color.WHITE);, M0 T- |2 Y a& ]$ v
- g.fillRect(0, 0, 400, 400);4 S8 I! y+ B& l2 J% \7 \
- g.setColor(Color.RED);
* P: G; f4 ` k0 `1 h+ n* @, \7 [6 u - g.setFont(font0);6 r* o1 G& y' l& A9 Q2 L
- let str = "晴纱是男娘";
( z3 X& S! J% d+ j2 U% A3 Y - let ww = 400;
6 f$ w" q; P+ } y% L( M - let w = getW(str, font0);' B3 A- L) o$ }' o. d+ [) h& L: U
- g.drawString(str, ww / 2 - w / 2, 200);' t) X9 B0 P( G$ Y, V
- }
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- const mat = new Matrices();
i0 C4 W% F1 V - mat.translate(0, 0.5, 0);# j, r0 e9 h5 Z% L) t p/ u% v
- 5 c0 y& X9 ^" Q1 S! F6 a; H
- function create(ctx, state, entity) {
! T7 I' K* u! Q" c - let info = {
! e% j7 p+ J" Q1 c* Z4 \ - ctx: ctx,( N4 x) B- t' `
- isTrain: false,
8 a6 H; p( y5 |1 L3 i' L; f* f3 n8 [ - matrices: [mat],
+ G8 A* M. ?( O) h+ _ - texture: [400, 400],
; `) @2 q( e4 F& u. D - model: {" F& u9 f7 j! P
- renderType: "light",
; c3 v$ b+ W8 D8 J - size: [1, 1],, u# z% n/ W: Q
- uvSize: [1, 1]
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- }
$ J' H) h% |5 ^4 J* Y+ u% p - let f = new Face(info);
1 N y! n4 S( M7 _ - state.f = f;
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9 y: R: ^. M3 s- let t = f.texture;
# R! H+ `( ~" n, z8 k* [# o' S. } - let g = t.graphics;
) `! `4 s. o0 }2 ?* b* Q5 A - state.running = true;: V* C0 l: ~' d- |& U! N' M) s6 b6 _
- let fps = 24;
' [3 c$ p1 l* m9 p8 q* n% F - da(g);//绘制底图
! t5 t- H# i8 D - t.upload();- P6 Z. `/ v) B. i
- let k = 0;
( h3 I+ C* T! d; t4 N - let ti = Date.now();
, z" W' g6 C! T2 n& p' ` - let rt = 0;
' q5 U1 {: C( l( W - smooth = (k, v) => {// 平滑变化
h9 l) M1 d5 f5 f - if (v > k) return k;0 p& n1 f4 f3 k6 j
- if (k < 0) return 0;' `( O! o$ s9 `) V- W! `1 N
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;1 \) ?3 b, p: Q$ r3 R* P
- }' G' r) [6 C- t: J/ K
- run = () => {// 新线程
+ D% j3 |5 {6 b( V3 U - let id = Thread.currentThread().getId();
+ [0 H# z2 l. _& Y/ [! V - print("Thread start:" + id);
' }2 |6 O7 d5 [: r1 e! z( p- z* A - while (state.running) {
8 @1 }) T5 Z5 t0 b5 c8 T* ~0 A1 _ - try {
8 P4 h# N' O# v - k += (Date.now() - ti) / 1000 * 0.2;
7 n W9 ?8 [' f% v& o - ti = Date.now();& d7 L5 N% W: @
- if (k > 1.5) {
6 N) K4 @; j4 p' T- F( \ - k = 0;: @ l0 q6 X7 w4 S6 H( T0 ?0 P
- }
4 N( G! p' K! I% @; e* X5 N - setComp(g, 1);
A! U$ v" t H( y$ F$ Y+ }/ C& O/ ^ - da(g);
4 A: `4 N+ {6 I* Q - let kk = smooth(1, k);//平滑切换透明度
( B3 V2 s2 S5 m - setComp(g, kk);
/ r$ U) k+ \, B - db(g);- V- Q& E- Z, i( u0 @
- t.upload();( `. C7 ^ ?" z; L# ?! I0 P
- ctx.setDebugInfo("rt" ,Date.now() - ti);
* R( C: e7 Y0 s9 s1 d: m - ctx.setDebugInfo("k", k);
) ]& W" _' [7 p/ Z - ctx.setDebugInfo("sm", kk);$ t5 l- L( r" N2 Z* b7 }' v8 ]
- rt = Date.now() - ti;
5 w3 h! \# x$ [/ U6 q( Y4 n - Thread.sleep(ck(rt - 1000 / fps));
" \ M# j' x+ b+ e6 t7 g2 ^7 { - ctx.setDebugInfo("error", 0)
" X6 u# `+ [" U% P# M - } catch (e) {
* d; j; s- x* X7 ^" h - ctx.setDebugInfo("error", e);4 ?/ k' n4 f7 i, X1 E4 q6 z
- }
- R# W! ^+ N( w4 P, Q - }+ H0 ?3 _; Y. b/ {" z
- print("Thread end:" + id);
7 p1 W8 I( A0 g7 |. ^ - }
1 o1 E& X* r" @, z - let th = new Thread(run, "qiehuan");
; }0 ~0 {$ }& z3 H+ V3 `& m! f - th.start();8 g" u" V2 f, J2 G# V
- }
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5 A9 t& i9 ~# L* N- function render(ctx, state, entity) {; Q7 D7 f% c! l9 c& a
- state.f.tick();# @) z! ]- g4 i8 Q; q: m, s2 v! b
- }# `6 Y t" I1 ~: _: V6 E7 N
- * d3 N4 ]7 }! q! C$ t
- function dispose(ctx, state, entity) {
. g! h' ^$ f. c - print("Dispose");/ ~9 j8 I) X ?% W J3 K$ V" F
- state.running = false;, D- D* i: t: G+ J: A/ J
- state.f.close();
2 `! ]9 X# \- @- \4 K# { - }
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- function setComp(g, value) {7 D2 a( _4 t8 A. P
- g.setComposite(AlphaComposite.SrcOver.derive(value));2 k7 K! `+ q E+ D# u7 O
- }
复制代码 0 p& y; }: w; C n! c; h! b* f
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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& f) h$ B+ O! Z! P( |0 Z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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