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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。8 y: x$ t& P/ K9 k
- importPackage (java.lang); h' w }5 `( \! g5 W y% y9 ^$ [
- importPackage (java.awt);6 y* _9 A$ W: R
2 ?* e& r: `3 p3 u6 h8 \- include(Resources.id("mtrsteamloco:library/code/face.js"));
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. {# z. @ H, n# V. U; j! g- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);/ X* X, A5 J+ P: i2 b$ A
$ `" q2 ^5 f/ [0 ?8 e: i1 K5 G- function getW(str, font) {
9 a% T ?; e# F. L/ K" C+ ? - let frc = Resources.getFontRenderContext();
5 b# H# d# X5 f" `& n& j4 R - bounds = font.getStringBounds(str, frc);) Q$ T" \; D% ^) u3 E$ M. b; H
- return Math.ceil(bounds.getWidth());* Q0 y2 F' U9 {* A' V
- }
) y+ a, u# ?# k" ~, ~! @ - 0 O; e$ k) I5 g' I" L! I
- da = (g) => {//底图绘制
' d( |+ f3 Z" s+ b/ N' M1 @ l* ` - g.setColor(Color.BLACK);
( y) z! @& G4 W. r! @0 i. I7 r: @ - g.fillRect(0, 0, 400, 400);- e8 P+ H6 ? @8 `6 d
- }' W: X0 O9 j" o% W& r# G
2 i- S7 B, v7 W6 F* B* o) t- db = (g) => {//上层绘制
9 u I9 V; U! `1 b7 O. | - g.setColor(Color.WHITE);$ u4 J$ k; [7 W& _" n6 t
- g.fillRect(0, 0, 400, 400);
0 g$ d) y# F4 T7 { - g.setColor(Color.RED);
, D; F0 J/ ^0 B$ W, G - g.setFont(font0);
& z. c$ x% p; G, \2 Q2 L% v4 F& S' H - let str = "晴纱是男娘";6 }# P9 e4 d3 k; d- k
- let ww = 400;+ d; }+ L) U% _* b# }! X
- let w = getW(str, font0);
* O# ^# E+ Z, e, U5 o3 s - g.drawString(str, ww / 2 - w / 2, 200);) z9 e: z' ~/ A3 J9 O
- }
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5 ~& M5 ^3 {0 z! K8 K- const mat = new Matrices();
$ b2 ]; v( Z/ l3 r - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {9 C( Y3 T+ C3 H% F" q. H- ~
- let info = {
5 R6 |. U- z) W; z% ?1 n4 p4 L; N - ctx: ctx,7 L* T+ h5 f+ w0 m5 @
- isTrain: false,
- u* S( ^! @: y - matrices: [mat],
) V, y3 g9 d/ R9 a7 I: F - texture: [400, 400],) M' O& ~& `+ R/ g1 g
- model: {
7 R/ h7 q# c& e- v' ~1 m% C - renderType: "light",
4 F9 x6 S3 O0 a6 B. d( [1 e - size: [1, 1],
, c& f! s2 ~3 v& K - uvSize: [1, 1]
# V) M6 S4 d, G, B7 D - }( N& c3 H9 C( w/ Q( Y; ?" o
- }
5 w. c5 A$ J" t2 {$ E# E3 g0 d - let f = new Face(info);* g! f. w7 c) \2 U) q& a( T
- state.f = f;" g5 p: V4 v0 C, M) ]
1 {* T. d5 q, N- let t = f.texture;1 G- g# j2 o; ]& f. X; P1 c
- let g = t.graphics;+ H& I% ~- n3 y7 c7 q" @9 Z, f
- state.running = true;2 z* W3 t. r' |
- let fps = 24;6 J5 f. V- L) F0 I
- da(g);//绘制底图9 q0 Z: z2 G! {" n, m$ P# W
- t.upload();
7 ~/ |& g8 N4 r - let k = 0;
4 X( T6 D! n, ]6 N0 L4 G$ W5 O9 C - let ti = Date.now();
1 @$ d; f# j% }/ L' S9 {5 m - let rt = 0;
4 G7 A- P" e; L0 e# Q% k$ i- O; \ - smooth = (k, v) => {// 平滑变化9 H$ N- S3 A& M
- if (v > k) return k;2 {. {: V+ H8 t6 n# G ~/ L
- if (k < 0) return 0;
# y* T) H# g: k; j* }! T$ e4 a - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;2 ]0 }$ p5 O% J7 c9 p
- }
& h7 l6 l& G, M; [( Z5 ^ - run = () => {// 新线程
. u# f6 F7 [9 C6 ^ - let id = Thread.currentThread().getId();
0 V' C# s' M1 C& ^4 G1 y4 T5 k - print("Thread start:" + id);
, L2 O6 k, T% x: P( w3 G n - while (state.running) {2 ?0 K- N. ?( i9 }/ @
- try {. s( W& Z. L' F" x
- k += (Date.now() - ti) / 1000 * 0.2;
& ?1 p2 {) D, |9 M- k3 ^5 b, ]1 ` - ti = Date.now();
; x/ N& Z$ y) x1 p( N - if (k > 1.5) {
$ x1 A; K- r* X$ j - k = 0;
6 W% B4 f) q) b/ U7 R. c6 R - }
5 ]6 k* u& Y0 v( h! Q. ~# e - setComp(g, 1);. c/ e2 @. ?1 B9 q' b! h! n. {) c
- da(g);* V# i- n+ Z) [# V2 K1 {6 [
- let kk = smooth(1, k);//平滑切换透明度
9 }6 Z% F M6 B - setComp(g, kk); g. i: T/ T" E/ c1 k5 y
- db(g); |* Z. k' a5 E# P$ l& r
- t.upload();2 L, `9 M" R5 Q3 h9 v
- ctx.setDebugInfo("rt" ,Date.now() - ti);
% a0 g! S% S5 k# U- r - ctx.setDebugInfo("k", k);+ T/ s' {! N$ V+ f) a
- ctx.setDebugInfo("sm", kk); _! i6 a$ x& m2 l& h# U( `
- rt = Date.now() - ti;! B1 `9 ^) }4 F' I8 m7 L( S" M
- Thread.sleep(ck(rt - 1000 / fps));
# V$ ~4 ~7 ]+ P' R* D7 \ - ctx.setDebugInfo("error", 0)- x( t+ W* n7 l& D% q
- } catch (e) {+ ~0 v9 e/ D0 C9 Y+ o4 C( k$ o
- ctx.setDebugInfo("error", e);6 e9 U+ q: p; j, K
- }2 n! F! o+ I e4 K6 m
- }# O$ C( F) H/ B/ w3 |! B5 `* B
- print("Thread end:" + id);
* y) t6 A- e Z {& c - }
) |; A9 [! ?# e1 A4 ? - let th = new Thread(run, "qiehuan");
- T; N$ j+ G3 u* c - th.start();
& B F' J; t4 \! Y - }
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2 I1 @$ U! D& T- m5 l& a d: ?- function render(ctx, state, entity) {
! K' u; ?6 }+ J8 M7 d& W - state.f.tick();
5 [ E; z) D: p' @/ y - }
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- function dispose(ctx, state, entity) {
4 z! ] T6 P& k( t4 Q+ I" B - print("Dispose");" r. D A) }9 R& M+ X
- state.running = false;
( S6 m4 f% d L* n+ ~ - state.f.close(); r' Q( ^1 r: `; B7 c
- }# M- X7 t! l& |1 B
- , j9 Q) x |/ X E# m" n
- function setComp(g, value) {
3 A# F5 v# @; Y' e* m. g - g.setComposite(AlphaComposite.SrcOver.derive(value));
s6 a9 p4 V) ^9 L- m) j I - }
复制代码
0 y9 ]9 Z6 K! h; ?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)$ t6 J' b# b9 g, _2 Z( q4 ~' A
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