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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。9 A; c' ]* p$ T8 i: e
- importPackage (java.lang);
/ x! ?6 J1 D+ ^ - importPackage (java.awt);& T0 m) U" C# T, q8 b( E3 |6 K
; q6 }2 ~8 c7 v, p7 W8 f- include(Resources.id("mtrsteamloco:library/code/face.js"));# B! k, g: B5 \, L
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( z$ r4 e$ d) `% c }# [
) o; r6 o2 a q0 y- function getW(str, font) {( F7 {) R, A; w3 q1 ~3 u
- let frc = Resources.getFontRenderContext();+ ^5 d* O. k# x1 g
- bounds = font.getStringBounds(str, frc);9 r4 a) V: Y1 d9 d
- return Math.ceil(bounds.getWidth());+ |& ?% {) R: n5 o
- }3 h! j. c- J6 P7 o6 L3 G
- * g: r* {( f8 I$ q
- da = (g) => {//底图绘制, y$ f/ ^9 Y" q6 S. y
- g.setColor(Color.BLACK);
7 O. B: W' S! e4 v3 N' z5 g. d - g.fillRect(0, 0, 400, 400);
) }( O2 J, N! B0 {4 D0 I: C/ q( C. T - }. i) X/ g+ w3 N. R: @0 r
7 X+ P O5 l0 M( y9 ~- db = (g) => {//上层绘制
+ W: g* N& [8 c* Z - g.setColor(Color.WHITE);4 Y& A1 }/ X, U8 p& L
- g.fillRect(0, 0, 400, 400);
4 G: t# Z+ v5 K% X" |/ C - g.setColor(Color.RED);
1 [/ I# [4 ?- Z3 A, U - g.setFont(font0);
/ c8 E* e3 J7 Q- Q+ X/ r! R - let str = "晴纱是男娘";9 g. B1 s! v0 c9 I8 [
- let ww = 400;
e E) i5 m) Y' v) h1 z - let w = getW(str, font0);
; n) E' u0 F% l* U - g.drawString(str, ww / 2 - w / 2, 200);. c H6 J5 N4 t: {2 p4 V! u
- }8 h5 ?5 G5 Y) L/ W
- # B1 L8 `2 f+ l3 L. B
- const mat = new Matrices();
; H2 `4 W @5 Y0 t - mat.translate(0, 0.5, 0); [# M# `2 D0 p) B
- & W e4 r9 h/ Q" n
- function create(ctx, state, entity) {
! B5 s* R! y. y - let info = {
/ y; s" \: U5 _2 ` - ctx: ctx,
+ p1 O5 ]) I2 y! L- X } - isTrain: false,7 ~8 k6 |0 X" _' J7 J
- matrices: [mat],
- L% v L# q2 K9 }9 B8 z% k" h; R$ f - texture: [400, 400],4 H% K4 V( g- V/ ]1 f1 ?7 `7 ^
- model: {& q& Z2 O) Y- g, ]+ l. B( @! U
- renderType: "light",
+ O J+ h4 ]$ n3 S - size: [1, 1],9 s+ w' J; D, c G; X
- uvSize: [1, 1], |: f4 F ?4 A# k- }2 q
- }
1 {$ o" J1 `! Z; `8 Y - }4 t9 K2 f* D# m: F' i P* b5 ` \
- let f = new Face(info);
/ i* L- C; e2 M: u5 L - state.f = f;
7 E# l) }- q) h, a3 t \1 N - B( e% ]- A3 H5 b
- let t = f.texture;
: l g3 O* R5 H" j9 Z7 O - let g = t.graphics;
2 ?( T1 r: N' u1 G+ Q - state.running = true;
F, o4 i& j4 o$ v& p - let fps = 24;
) X( P) Q m8 U! r4 t, e9 J4 d, @ - da(g);//绘制底图
/ @# b, R4 J7 q8 V* r* K' j; \' Y1 A - t.upload();6 w0 k# H$ S% i+ b& u/ b* ^
- let k = 0;0 e: P1 I/ @: G2 B5 A; U
- let ti = Date.now();2 Y7 F u6 A' i
- let rt = 0; P$ I. D7 G4 F) }9 Q* d
- smooth = (k, v) => {// 平滑变化
0 }) v2 Q. f( l/ \% L2 Y( L/ g - if (v > k) return k;2 p2 m7 N4 `; H; u' g
- if (k < 0) return 0;3 \+ }+ P" K y( Q% K4 Z) k* l
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 u+ ^9 a! U+ m" g: H - }: x: {" w! ~1 H( G Q8 `
- run = () => {// 新线程* |, s- r5 i1 U3 _, K
- let id = Thread.currentThread().getId();
3 L n$ B/ l/ {4 H4 a. a - print("Thread start:" + id);: k0 E$ \" }+ B' A' g D# Z
- while (state.running) {. w* E. u9 h8 R+ | q
- try { e' h Q2 E, Y+ B# W+ L
- k += (Date.now() - ti) / 1000 * 0.2;
C& V) A/ K5 @8 } - ti = Date.now();
6 R% c* K2 T2 Z. Q- k - if (k > 1.5) {# N. n* I6 q9 g: P
- k = 0;
1 ]" E+ U1 [ s5 Q" e) U% i - }
( a+ `; H7 K! |& }) B! W - setComp(g, 1);+ i+ g* d5 h5 j% K w, k
- da(g);( h& X; S. g i
- let kk = smooth(1, k);//平滑切换透明度. R+ Y( Q' J' x) U% p! O
- setComp(g, kk);2 g4 A0 n0 r# |; p' q" U
- db(g);
- x; {0 ]) {$ }% [. z - t.upload();
' J8 Y2 f [4 @1 x6 c& Y - ctx.setDebugInfo("rt" ,Date.now() - ti);; p2 r, K4 c5 U
- ctx.setDebugInfo("k", k);8 n0 w# q$ ~) R5 V2 l/ o
- ctx.setDebugInfo("sm", kk);
5 V* e6 e# _6 r C3 ?" u( I, s - rt = Date.now() - ti;
. z+ U7 Z9 @% ~7 v# o8 E) o7 s6 n - Thread.sleep(ck(rt - 1000 / fps));6 ^) t2 ^( j# \' [9 H5 T
- ctx.setDebugInfo("error", 0); o) r: I- W8 ?
- } catch (e) {+ U6 |" A2 A4 P9 a
- ctx.setDebugInfo("error", e);
( a. }1 M3 M! Z$ \& V - }
! I9 z: [/ d; ~( D - }5 H9 m; x3 B3 j
- print("Thread end:" + id);
" b: ^0 i0 K0 Y* K - }9 t" R6 m) b: P. B6 g- r
- let th = new Thread(run, "qiehuan");/ W1 }9 _& Z1 U% V3 A" f
- th.start();
5 {8 g2 U' ^# X" r - }
, j/ b$ S; B" u0 ]9 F$ X; ~8 u
- x" A' i. b2 [/ J9 w- function render(ctx, state, entity) {
5 i. j! }6 `) v: E3 B% c( q0 f - state.f.tick();! @- J3 d$ `. {, ~. I. ~4 {9 @
- }* _3 `/ E4 A+ B. Z# k
- - a4 ]$ E8 f" o- h1 Q
- function dispose(ctx, state, entity) {9 m$ ]0 u% {& W. ]/ a" k/ [
- print("Dispose");" ]0 z! o* ]& B; `
- state.running = false;8 j7 d8 u; R! [9 D2 w6 K6 R
- state.f.close();
. f$ D% d6 {6 b$ L$ R - }
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- function setComp(g, value) {
# F \* n4 G( I7 L2 Y* ^4 \ - g.setComposite(AlphaComposite.SrcOver.derive(value));
/ [0 x3 g, t1 ]! v% b8 J% H - }
复制代码 $ v# @% f, c7 ~8 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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( I$ g+ ~, [ i' A顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)# t, \% y% p2 ?! E0 f; F: T
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