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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 d0 ~9 E' P9 V; u
- importPackage (java.lang);! w* L4 ?" Q! V, }# c0 P5 P
- importPackage (java.awt);5 m& v1 b; s; z2 U1 M
" W* ~' b0 d# Y% L1 Q- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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]& U. ~' h2 L1 u$ }" Q" M5 ~- function getW(str, font) {5 F. g5 O( E+ |2 p
- let frc = Resources.getFontRenderContext();! T% D# i, e: G0 v4 e
- bounds = font.getStringBounds(str, frc);1 j" r1 b$ x: ^! c: K7 a
- return Math.ceil(bounds.getWidth());/ f& X! W" F% y8 G
- }
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- da = (g) => {//底图绘制0 c- T7 d: \/ c# M# h% ~$ u
- g.setColor(Color.BLACK);: ]5 f6 f% m3 j0 o3 C3 [& R, |& w, }
- g.fillRect(0, 0, 400, 400);
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- : ^9 B) t) ]* @% s+ k
- db = (g) => {//上层绘制0 {* ^0 K% O8 d5 u5 n
- g.setColor(Color.WHITE);2 G3 D9 W: d, \
- g.fillRect(0, 0, 400, 400);
' ^+ ]2 I0 \% m. M' t - g.setColor(Color.RED);0 D5 Y% O- q5 ~% O. Z$ R
- g.setFont(font0);- Q+ R$ k* b0 m" \! z; V
- let str = "晴纱是男娘";
% O4 M) z( A6 A - let ww = 400;9 F B* j' M2 e5 q- a% Z
- let w = getW(str, font0);( ~2 M9 R `5 T0 Z- z& Q2 M
- g.drawString(str, ww / 2 - w / 2, 200);9 ?/ ~5 g* q6 `/ v# d7 M
- }
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- const mat = new Matrices();
' c o0 k3 v7 K# ]+ _* l; V - mat.translate(0, 0.5, 0);& z( }+ C, r; z7 j! \) j
- 3 L) }# A% x0 t3 M# _
- function create(ctx, state, entity) {8 A e5 E8 C3 a5 A0 ~: a! R
- let info = {' V* X" O7 o6 \' w$ \; f3 O$ K
- ctx: ctx,0 d% }8 X3 l0 R$ I) i4 p# d* U4 O
- isTrain: false,% g4 m: P* p7 q- k8 |8 ]- f/ b
- matrices: [mat],; f4 c* K. |1 `8 m7 w, g: Y
- texture: [400, 400],
5 c- R3 h7 Z7 W. ^- N - model: {/ r+ f8 q8 g R* o2 n, ~
- renderType: "light",
9 J9 ?* p4 r: X1 X" ] - size: [1, 1],! R2 R: {" X1 C( D9 U# \2 U9 m
- uvSize: [1, 1]
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- }
, v/ ]7 G& C7 A: u+ ?; y - let f = new Face(info);( L g& R- _! V) \6 q
- state.f = f;/ B4 ?6 V" A9 U: _0 A# d
! i# k% t9 t9 f5 d. u2 T, V- let t = f.texture;
/ \4 Q: a; u# ~+ g. K - let g = t.graphics;
( U9 u7 o* E/ ~ ]7 x$ u8 P$ [ - state.running = true;: ^; @3 F" r* r& ~5 Q7 z- t
- let fps = 24;3 t3 d" F/ i/ `6 @# x" F
- da(g);//绘制底图
( K2 Z" I% m3 u$ Q& l! F - t.upload();+ [# h" x. g0 s/ U& P
- let k = 0;
, \: }2 c1 C3 g) r$ y+ X - let ti = Date.now();6 y! A6 Q$ K$ b6 C+ y& o
- let rt = 0;
' q; V1 ]# a& ~% o o& ^ - smooth = (k, v) => {// 平滑变化
2 B1 I- a- ]1 C- h/ v$ _, k) n - if (v > k) return k;7 ?3 ]6 Q/ h' u# m1 B# }
- if (k < 0) return 0;
; @ |2 x: s* f d! a2 N - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 B& v8 G( y5 @0 p6 Z {! C% l3 F- | - }
' O9 ]9 \! `1 @- z) Q - run = () => {// 新线程
7 \0 c; E% Q2 a+ g - let id = Thread.currentThread().getId();* O2 {# }& e+ A7 U
- print("Thread start:" + id);+ k8 `+ w% ~- g D2 X# Z/ y
- while (state.running) {% A% {- p, O; C! i: ^# X9 f! M
- try {0 a- P7 V4 w! @2 y6 Q3 H/ r4 W( G L
- k += (Date.now() - ti) / 1000 * 0.2;
* c. V, f! [# ~# K, N2 E7 I - ti = Date.now();' D9 }9 l$ K6 M O+ `
- if (k > 1.5) {# t6 l, ]& X$ W% P
- k = 0;
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- setComp(g, 1);. r* V4 C# J; C0 j9 L& t
- da(g);' ]& z' P3 P/ B/ J
- let kk = smooth(1, k);//平滑切换透明度
5 C: T( i% i% S - setComp(g, kk);
: _# s/ ]9 a2 |" _7 o( U8 _ - db(g);
3 K+ z( ^. V. ?# |$ R6 D - t.upload();
: P% H0 r5 i" [- T) P, @: r - ctx.setDebugInfo("rt" ,Date.now() - ti);2 [+ d1 R9 ^% l* T) I8 ]
- ctx.setDebugInfo("k", k);
. e! i5 q9 C* C+ G* S - ctx.setDebugInfo("sm", kk);$ @; }9 N' X# ]2 V/ [5 B
- rt = Date.now() - ti;
. K8 q% F" B# J+ W+ t9 x7 ~( ~ - Thread.sleep(ck(rt - 1000 / fps));
. t2 s' T1 A3 S0 M - ctx.setDebugInfo("error", 0)( P4 n4 @# Y/ u( q& C. U
- } catch (e) {
6 J# K( l' t$ i V/ }& ]5 a - ctx.setDebugInfo("error", e);+ J3 f3 j e- }* T
- }) B$ M$ g3 b1 |0 `: |) M
- }; R; y$ u& W" H+ D3 z3 G
- print("Thread end:" + id);7 C) L* N: }: c8 b2 M! x9 S# s' w
- }
# b! x7 G- [1 F2 N/ ~4 i! {2 m - let th = new Thread(run, "qiehuan");8 P" @2 V3 R; J, u
- th.start();/ q. y9 w! G1 U- Y( C/ J3 }
- }
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. R& f [5 S' r4 D+ S% f- function render(ctx, state, entity) {
) {+ q+ z* ~4 u2 H - state.f.tick();
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7 _! P5 C! _4 Y# D% f5 ^1 A- function dispose(ctx, state, entity) {
$ Q) ~ W/ n% A3 Q* @8 F) v! R - print("Dispose");
) y* C5 |# U, b0 ]& l1 ? - state.running = false;
! n u" A j, S* ]/ R. B9 Y - state.f.close();
! D9 K B1 u* H) J& P - }
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- function setComp(g, value) {
7 x, s8 S' s$ O ^% }; {% F - g.setComposite(AlphaComposite.SrcOver.derive(value));
7 K" h+ ?2 }1 H1 E5 u$ C - }
复制代码
- ~7 K4 Y$ `$ @, D- e( @/ V( _9 D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)& R9 S7 q Z1 ]" @2 ^9 n; R& q
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