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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。* ]4 n* {/ q! T F1 q, G
- importPackage (java.lang);3 D: t* X: C6 r3 F
- importPackage (java.awt);
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+ F" i% Q' ?- N- include(Resources.id("mtrsteamloco:library/code/face.js"));$ n u; J5 g: _9 `8 z0 w) x
- ; L7 d2 F6 i2 m. O$ D7 x
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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# E) |8 E. `/ x; h b2 k- function getW(str, font) {$ Z2 z) j4 b! e) R+ ]
- let frc = Resources.getFontRenderContext();2 o. I% D0 R5 V% F& `0 U8 H
- bounds = font.getStringBounds(str, frc);/ a7 p4 l' I' Q2 D/ J6 n
- return Math.ceil(bounds.getWidth());: ^9 o: P2 c( u! b$ n
- }
, A! G8 q3 T9 J% ? - G" t! l7 X7 S0 u% Y7 ]
- da = (g) => {//底图绘制 {3 |' |, |2 g" G! E7 o
- g.setColor(Color.BLACK);4 o7 `, O$ k7 T7 E
- g.fillRect(0, 0, 400, 400);, K9 G2 ^# g/ _7 ?, r
- }( U7 }9 c7 V& Q, @ b* G8 c; O0 g
- c& D# A- ?1 f
- db = (g) => {//上层绘制
, G( D- r7 V" _& o2 b - g.setColor(Color.WHITE);5 R( C" U3 C2 X* M k+ ^
- g.fillRect(0, 0, 400, 400);
5 p" j# ^5 T M - g.setColor(Color.RED);
2 H/ w) ]% l9 n - g.setFont(font0);0 l5 P% o9 q* `2 X& F/ Z$ e3 M
- let str = "晴纱是男娘";
. |( G) r" G) `: I4 u - let ww = 400;
% x5 u! H1 z1 _/ C - let w = getW(str, font0);
2 W3 y. k' }5 y0 j; E - g.drawString(str, ww / 2 - w / 2, 200);
' h3 \; a, L2 u# p e/ \. U$ v; B - }
+ N; M- Q) G) ~6 R5 c8 l+ a - 8 v, M% r3 h+ {$ y" s7 }
- const mat = new Matrices();
, y' P2 v! f; D4 p0 z, S - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
6 G8 i+ U8 A: Q x - let info = {4 J: I. r- a/ v# g. k
- ctx: ctx,2 y9 I+ z" `, G( U6 _5 e. ~& B
- isTrain: false,
# C, Y2 m1 F1 U S0 r5 G - matrices: [mat],
3 a2 |2 B, R0 f) l- |, v/ Q - texture: [400, 400]," ~0 y- {# H* B
- model: {
( a: d; Z) }% i6 I& w6 J, q* C - renderType: "light",8 R9 s3 Y* g& s6 x. {* w- _1 Q( ^
- size: [1, 1],( X8 s2 U7 x2 K: t1 S ]. S
- uvSize: [1, 1]0 k M7 V2 O, \% N$ n9 t
- }
: ~$ r1 m7 z. J8 E - }. |5 C: T- u: n+ }
- let f = new Face(info);% s. ^" o+ _* O0 J
- state.f = f;
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- let t = f.texture;
2 S9 g; ]6 Z, O - let g = t.graphics;; F& N9 \& B0 {
- state.running = true;
; c/ Y2 ?5 [: c& o$ B. @ - let fps = 24;
+ e5 s+ i# e! X2 j$ J( {5 c# J - da(g);//绘制底图1 N& s9 |( H" j
- t.upload();) ]( ]4 B" q( V) I2 ^8 x
- let k = 0;$ h: O. d0 J1 U% R& }9 N" }
- let ti = Date.now();
9 l/ d; [5 M5 H3 @, h, i7 d - let rt = 0;+ f. w- M' v$ v1 t. y
- smooth = (k, v) => {// 平滑变化
8 i z, O4 \8 m, V, p) T0 E - if (v > k) return k;1 h2 V6 t6 L9 d, g
- if (k < 0) return 0;9 _! M$ ]7 v1 ]
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
y* `; j3 ^% Y" F0 X - }
% K, D8 V: r7 ^( O, D - run = () => {// 新线程
! K2 K% {0 x; R, J$ ^. ] - let id = Thread.currentThread().getId();- g7 o9 L: K3 B v6 ]8 W
- print("Thread start:" + id);
# D5 {# l# s4 ~7 ?# z# j8 p8 c - while (state.running) {: E/ s' a9 k$ d+ t
- try {
" w, U) n' E/ V - k += (Date.now() - ti) / 1000 * 0.2;
/ O: t( G" q, `4 R: [ - ti = Date.now();
% ]: q, L$ D% Z6 H! N% A4 G" |5 w - if (k > 1.5) {
' C$ u" i0 Y, u% [' \! @ - k = 0;
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- setComp(g, 1);" T* s# h, O( [7 i
- da(g);
/ i: n& l- O; q - let kk = smooth(1, k);//平滑切换透明度( ?: |# G( E# l' y3 T1 s' v5 D
- setComp(g, kk);
% W' j) r+ ?3 ~, _2 r" b' D) } - db(g);
1 F3 L# Z. a5 m4 q$ a& O' h - t.upload();! j* Y9 }$ r$ E9 a4 h$ C
- ctx.setDebugInfo("rt" ,Date.now() - ti);4 C/ d; s/ C$ R& X2 X" _+ f- N/ [
- ctx.setDebugInfo("k", k);
0 ?3 v; D' r2 p0 H) H6 x8 h - ctx.setDebugInfo("sm", kk);
7 B9 P3 r( Y4 e# x" w! W - rt = Date.now() - ti;: u% \1 W4 a1 i& h3 b1 E
- Thread.sleep(ck(rt - 1000 / fps));
7 ]2 G) ^9 Q5 a9 `6 T( _! d6 z - ctx.setDebugInfo("error", 0)
v( g! H4 J3 H5 |* ?. d9 L1 k - } catch (e) {
* W/ a! j! S; b/ p/ I - ctx.setDebugInfo("error", e);
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- }: v6 }5 z" @: o1 X% y0 w
- print("Thread end:" + id);" E. m5 q& w/ S. J0 X7 _
- }
$ Q: s) j( W3 i) P2 u0 m/ d - let th = new Thread(run, "qiehuan");2 H8 \9 m5 p) O- }- O5 n
- th.start();! c3 i, ]5 @: u& H& Z
- }
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- function render(ctx, state, entity) {
) P$ K2 W/ J# C( d# @/ y9 T - state.f.tick();
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/ e( q# T7 a. M- i1 q3 ]- function dispose(ctx, state, entity) {) ]8 |1 d! R0 p' J
- print("Dispose");1 \2 N/ \/ G/ o( V& F
- state.running = false;+ T6 m; S+ R% V% o1 t7 c" `+ O
- state.f.close();; w0 K) u* z; _+ G
- }
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. i! L$ |$ D: f$ u3 `+ m$ X- function setComp(g, value) {
, [' F3 @* d) a) a - g.setComposite(AlphaComposite.SrcOver.derive(value));
. Z) o& g2 a' ^4 ^# h4 W - }
复制代码 , ~/ p% K1 v( v6 F, v
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。' Q" `' U- C: g" r, h& k4 j7 r
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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)2 C. }& Q$ b9 j; f. \7 ~
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