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% _* y4 J! M6 m& I" ]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。2 \$ K8 ~, G2 }) ]
- importPackage (java.lang);
" f5 f- _) w: a6 n ^; U; i4 w - importPackage (java.awt);
- O& U7 M0 c |5 h3 Q - ( C& X7 S- F- S
- include(Resources.id("mtrsteamloco:library/code/face.js"));) ]- l2 t' [6 x9 O9 ~
! B# M0 @( w7 U& V- }. f- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
% j# v. {6 ]* R0 Y" X8 b
; e, a. D( ?4 C) m" i. F3 I- function getW(str, font) {
8 n+ q# e: V- U' F - let frc = Resources.getFontRenderContext();: j0 |* f- a) w5 `7 h, p' B
- bounds = font.getStringBounds(str, frc);
9 }5 \+ L/ W; a9 m4 Q! {% ~ - return Math.ceil(bounds.getWidth());
]1 B$ a: S1 @' B& {, l2 T5 Q - }
4 M* j+ _! i, z/ W - ! t& n Z R5 ?
- da = (g) => {//底图绘制: G# @9 L5 _( [$ G4 T
- g.setColor(Color.BLACK);
- c, p6 X) g7 e6 Y. p$ R i - g.fillRect(0, 0, 400, 400);
* E( C# v' ~7 ]& C6 t - }7 e4 K" \+ q& f1 y$ P5 Z( U9 x; p
/ g3 \% p1 k' p0 {8 f- db = (g) => {//上层绘制% M" f' d" l! {7 g7 h1 J, f2 ^
- g.setColor(Color.WHITE);1 s& ^6 L0 p; ]. r v* C3 O* j
- g.fillRect(0, 0, 400, 400);
! S, J5 W9 ^( _( W+ ~; F4 E - g.setColor(Color.RED);* F3 I9 n) h0 t
- g.setFont(font0);' W/ Y) p; E7 ~2 \0 I
- let str = "晴纱是男娘";/ {$ x( U3 W; d, O* p
- let ww = 400;
. k) {. g* p3 H0 f _4 Q( T - let w = getW(str, font0);
" ]: \6 B0 w9 ]1 U$ }+ g - g.drawString(str, ww / 2 - w / 2, 200);' s: O/ h6 i2 H o t
- }
) r8 J* q: j. o% }" i
, X7 ^4 e8 C& P$ z- const mat = new Matrices();; t7 w. a j ?* x5 y
- mat.translate(0, 0.5, 0);5 `/ n5 u' ^) o& D5 U4 B
- 9 d, D O j: b5 S* k" G3 q& g: N
- function create(ctx, state, entity) {
5 ^3 _. S+ t% \ - let info = {
; X O1 ^, J7 G7 { - ctx: ctx,
* G( `0 z: N+ ^/ {8 ~7 Z" o. u$ X - isTrain: false,
- X4 Q- r; q9 S0 G A: E - matrices: [mat],# m6 h( n4 ~5 C0 W M* u8 w
- texture: [400, 400],
% E0 D6 q7 x7 ?. `/ F4 {9 Y6 G5 u - model: {
+ @' F! }3 E; V2 Q0 h2 t/ T - renderType: "light",
, \1 j. F% n: v: H% V - size: [1, 1],+ u# I g- E5 X( X
- uvSize: [1, 1]
( Z7 P4 U2 P! t$ r - }
1 ^$ e$ ?# {. n+ N- X - }" U6 r/ h, u6 Z, T
- let f = new Face(info);( h* X; D$ |2 C1 U- c. d% h9 C
- state.f = f;% g. N0 p# ?, _( L* L% C: h1 a) O8 e6 N
& R& o$ N9 i! K; n+ F* {& i- let t = f.texture;
4 D" O$ T- g; L9 i+ |% D+ e - let g = t.graphics;- w+ T. y4 N' o1 Q) R# y& x
- state.running = true;
+ K/ H+ ~8 g0 p - let fps = 24;
& y" I/ m) m7 ~2 J" f0 e - da(g);//绘制底图
% J: h/ n) i( G5 `3 X - t.upload();; n6 A. M- l9 T5 J9 u7 Y3 T
- let k = 0;" H( L% g0 P" r9 _6 h
- let ti = Date.now();7 N/ N5 g. R9 I9 S3 v
- let rt = 0;, V' b' Z5 S, y. P1 `, G7 l
- smooth = (k, v) => {// 平滑变化$ \! c$ l% T% _3 l% n) ?
- if (v > k) return k;
$ ]% K: A( R9 S! T4 N5 c9 b - if (k < 0) return 0;; F0 `3 F$ t+ A
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;8 ^0 m" l+ a: f$ K7 U
- }
5 B, v ^* W0 k - run = () => {// 新线程
0 c7 _2 n# E g- {+ T% o) e - let id = Thread.currentThread().getId();# G( b, O/ K/ _& l& i) ], N: n
- print("Thread start:" + id);+ f" D3 L8 g, ]( W* Q$ k/ l+ H/ f( }2 z
- while (state.running) {
) F# D9 m, ?$ J: V - try {
* J% J& i& I3 \3 ] - k += (Date.now() - ti) / 1000 * 0.2;
$ A6 b& ^" G+ L- K! t u7 i% l: l8 ] - ti = Date.now();9 z" {5 T5 H0 Q& z: u# l9 c5 I
- if (k > 1.5) {
; H% D- w3 V5 P+ {+ f, ^5 p* i - k = 0;8 ]6 A W R- k2 }2 Z9 W3 R
- }
/ ?) j( X: ?4 v2 Z - setComp(g, 1);+ a7 f B; g, j6 W/ ]. U
- da(g);( U0 s( @7 J! S" D; U
- let kk = smooth(1, k);//平滑切换透明度
; U; u6 R+ z! E! Q - setComp(g, kk);
% Q+ o( u# r1 j& F - db(g);
- F' r2 r8 i/ ^6 B4 R5 ] - t.upload();4 Q% Y& d B2 B9 ]4 A
- ctx.setDebugInfo("rt" ,Date.now() - ti);% |9 {$ r$ W9 I" p0 j9 Z, s( B) j
- ctx.setDebugInfo("k", k);
' k$ w" m; R2 F: y' [2 \ - ctx.setDebugInfo("sm", kk);8 }1 h+ s! `5 I0 u1 k
- rt = Date.now() - ti;' _' g* L. N& `" d; }
- Thread.sleep(ck(rt - 1000 / fps));
$ [ C3 |6 {5 n+ d9 N3 j% K - ctx.setDebugInfo("error", 0)
- y1 z4 H/ S; W k- s! k2 e6 V - } catch (e) {% q7 P2 K. Y# C) p
- ctx.setDebugInfo("error", e);
4 h0 G/ V* z! e - }" p* d. u, w; T" T4 G
- } ~% a, N. S$ O! `. ?$ J
- print("Thread end:" + id);' u3 ?. O, I! c8 k0 q8 I. ]
- }2 \7 z) b8 @7 ^! F7 s; J
- let th = new Thread(run, "qiehuan");! L. ^: L6 S+ p/ z- }. l. t
- th.start();
- E2 j0 D A3 P' [7 _" o+ S ~8 E" A - }) W& I P2 M9 a; s. P0 X2 l
- ( g; h/ e2 U1 O
- function render(ctx, state, entity) {
7 l+ R( w; t+ `! |: y - state.f.tick();
8 [/ H+ P+ G3 C3 G5 u* W- d6 J - }' W$ x# x, I+ d E: C' v
8 ? l# J2 b: n; r! L- function dispose(ctx, state, entity) {
6 b. E! ~* o. `- ?$ g- W: v - print("Dispose");
I+ g4 j& e Y5 Q/ o/ y - state.running = false;
3 B. s! g/ S' |+ k$ o5 B# }8 @9 i - state.f.close();; Z2 d- C, n* e2 v$ A6 E0 e7 d# F
- }
+ b0 F5 N" B8 N; U - 2 Y2 H" `4 T4 x, U+ x; x8 m
- function setComp(g, value) {
0 w& Q( Z, Q+ |. L; Z - g.setComposite(AlphaComposite.SrcOver.derive(value));
! z V; j0 [1 a3 Q6 d- b( m - }
复制代码
4 L! E9 O; w6 n9 k) t4 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。7 e/ n$ y& e9 y l) i" S2 l. ^
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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)) z3 @+ S7 s! C& g H
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