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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。. _7 W- P5 X4 a' y& l, \
- importPackage (java.lang);
X! R. x$ [+ i/ ^/ [( B - importPackage (java.awt);2 X2 N: v2 H9 D+ s+ X
- % ~) p& ?/ x4 H. r: I
- include(Resources.id("mtrsteamloco:library/code/face.js"));+ s; R! T Z; [: q# R; i+ [
: e/ r8 I6 V4 G8 I! o- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
8 d4 h, }8 ]) T - 0 h6 Q* n+ y' v3 _% h% F( l$ s' V
- function getW(str, font) {
8 |1 _3 x4 j1 r) h5 k5 i0 E - let frc = Resources.getFontRenderContext();+ g; \' P9 a5 b4 A
- bounds = font.getStringBounds(str, frc);& r: j; K6 S9 L: S% s' U q
- return Math.ceil(bounds.getWidth());! p a$ p$ E7 f# ~
- }
# s1 L% Q+ c& U1 G5 i$ V - 9 I5 O; v% o. k0 k0 ?4 M; @! Z$ x
- da = (g) => {//底图绘制
- J7 g# b/ ]2 C3 W - g.setColor(Color.BLACK);4 E. R7 ?$ {) F! M/ H) S/ G2 ]
- g.fillRect(0, 0, 400, 400);0 J4 Y. A6 p0 f4 {+ F
- }
6 \. d" f2 f$ J9 [& s* S* K5 y
/ B8 p3 v2 D1 A) n" N" g- db = (g) => {//上层绘制
& }" @) X, L0 S - g.setColor(Color.WHITE);* R \: \! D/ q1 y5 m
- g.fillRect(0, 0, 400, 400);
7 |9 T, e" z$ A8 I+ ^1 m8 S' V - g.setColor(Color.RED);
; x9 W3 T+ |3 o. K - g.setFont(font0);
& V e+ q* b( I" ^- \" i% | - let str = "晴纱是男娘";- J, ?9 ^3 N- M! Y4 K1 [
- let ww = 400;# d* V4 G5 w0 [; r
- let w = getW(str, font0);
2 Z2 i! R$ ]# {) z& s - g.drawString(str, ww / 2 - w / 2, 200);( u3 g7 u# ]9 p& f& H# `6 U0 \& N- T
- }. W. @% B; {6 V0 \% T0 N; g
- / j; `: R/ d+ s1 M
- const mat = new Matrices();
: V: K) V( U5 c, G: M - mat.translate(0, 0.5, 0);
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$ W; V. [# g# a9 ?- function create(ctx, state, entity) {
# |' f4 `: c) c0 d, c- \9 l - let info = {
6 w7 s, ^) [* x' w. \7 L6 T& L - ctx: ctx, y8 r+ z+ J/ y1 }" `
- isTrain: false,
, Z7 G$ U B! H2 B. p* Y - matrices: [mat],4 h" K" S. l9 L) a" {% u3 @4 Q
- texture: [400, 400],
- h. {4 k, R; ^8 l+ @# t8 \5 t! T - model: {
2 x' F/ p/ @: v - renderType: "light",9 C7 w, b% E( l+ i( m( ]' W: Y9 i" D
- size: [1, 1],1 I( S( ?, a7 a9 K& j/ I: K
- uvSize: [1, 1]
$ i1 L0 f |( \! z$ X7 c2 [2 x" }: i - }
! a, z( {7 E9 p( G# z - }! a: b; u( P2 v4 t4 s) U
- let f = new Face(info);) H- I3 h; g4 E- c' D& B# `% V( o
- state.f = f;" J8 o: F9 ?, U. B! `! a( g# o
- * ~1 d8 u1 @3 [$ B) p
- let t = f.texture;
) l* J% S! B( G: H+ z - let g = t.graphics;9 S9 `1 @8 v# C8 s2 q$ n0 |
- state.running = true;5 V% [/ b! ?# f6 f) s
- let fps = 24;
, a; |" c1 z0 J1 ] R) q5 |- b - da(g);//绘制底图
2 x5 \" C2 k' n$ n - t.upload();$ f3 j; [1 ~. y
- let k = 0;
: o+ C8 T0 S% E3 ? - let ti = Date.now();8 w' N& a* j$ k
- let rt = 0;! Q/ G. [8 k( D/ Q6 K8 K" ^6 ]7 W2 C
- smooth = (k, v) => {// 平滑变化
5 M) n. V8 [/ }1 Q2 G6 U/ ] S - if (v > k) return k;5 K* \' t( @2 Y
- if (k < 0) return 0;/ f, c) U( x) e' \
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;* A6 C( M. ^! G( N
- }+ w- X+ ]* ^2 F2 P% D; d; u7 m
- run = () => {// 新线程
; Y- u: v1 z: i# F - let id = Thread.currentThread().getId();3 v( b$ g# _# l( L$ z
- print("Thread start:" + id);8 L# m1 e, H- _( U
- while (state.running) {) O) S, C2 p3 F" `0 |+ ^
- try {$ m' ~% e6 ]: k# @8 M
- k += (Date.now() - ti) / 1000 * 0.2;
. c; s5 M8 @' w+ f ~! D - ti = Date.now();
/ K% I! T: B8 w# g( O - if (k > 1.5) {: V4 ?4 a3 x0 c, r- E. D
- k = 0;
6 P( K, Y/ Y3 f5 U. L/ n/ l2 P - }' l: z! E9 Z" Z% |" j9 o/ B- \
- setComp(g, 1);' p5 u+ |1 Z' R* n) u' o7 g
- da(g); y1 P. E7 ~5 v
- let kk = smooth(1, k);//平滑切换透明度2 _: z1 p& E" S$ G
- setComp(g, kk);- b/ U9 P8 a# D7 D5 E
- db(g);
( R4 _; v- P; g# W9 B - t.upload();# M- x: }+ L+ O0 ^1 D# d4 k& l- K
- ctx.setDebugInfo("rt" ,Date.now() - ti);
7 W1 A) {7 p3 i- Y! L2 ?0 b - ctx.setDebugInfo("k", k);
* {& Z$ n# F" i2 Y0 F - ctx.setDebugInfo("sm", kk);' N/ ~. c: U/ H1 r1 d: x" E. z
- rt = Date.now() - ti;0 @( _5 D. v/ K% y$ ?3 s0 |; \
- Thread.sleep(ck(rt - 1000 / fps));' J8 ` V" S0 B1 `9 M' K6 {2 r7 J
- ctx.setDebugInfo("error", 0)! C/ D! p9 H0 U; V) J0 c+ ]9 M
- } catch (e) {
s" m2 s: r4 f( \5 l - ctx.setDebugInfo("error", e);
) z* K3 A( b, k8 T7 }" q - }
8 z. C" y! S& H- y5 ]! c! P - }( ]- y2 n- G" W/ n/ r9 d- i/ A
- print("Thread end:" + id);
& `, V" M/ ] d5 B - }
1 u1 C, W5 ~) z - let th = new Thread(run, "qiehuan");6 }4 J& C5 }- c1 I/ k
- th.start();
+ ^ o! c+ D2 i - }
+ F5 R. x! R$ Z4 G5 w) K - @' M. d" v) _; Y
- function render(ctx, state, entity) {' \& V% S2 n+ K0 {/ p9 ^
- state.f.tick();5 v" R+ E- u1 G& p! J6 }6 B$ G# L) Z
- }
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) i; @5 r) q1 |- function dispose(ctx, state, entity) {7 h# J, Q f" A
- print("Dispose");
) ^4 ]* w9 Y3 R8 _2 V( t _& B - state.running = false;
# @! P9 ?* h u* o - state.f.close();
! o+ E1 b+ `, N* D: j: S - }1 x( Y$ o- e" W" b
3 z4 j1 f6 n- ~, l T- function setComp(g, value) {( \* T( [* ~" b& _4 o8 [1 J1 A# D
- g.setComposite(AlphaComposite.SrcOver.derive(value));" I' ] x+ o' G' N# y. r
- }
复制代码
- n6 C6 m% X' h7 H) p/ d/ 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。
p1 @5 |$ n+ \; U3 D( i3 ~0 k( o
2 A3 ?( n; g5 l3 v( _/ @; ~6 ^顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)1 b, ?$ M. C o2 Y1 k s' i
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