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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。
; ]5 L$ Q+ P% I- importPackage (java.lang);/ w- e1 D6 P% x$ _- h0 b+ ^5 O- g
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
- [" |. P1 J! _; Z7 @) J - ; D* C9 [& V3 x& S4 r! R
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {9 g; N* V" b+ g+ r9 f# t0 y! S5 I! o
- let frc = Resources.getFontRenderContext();
% R: e+ g: z" M& t# C7 b - bounds = font.getStringBounds(str, frc);
D: R8 N( z! S8 C - return Math.ceil(bounds.getWidth());
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/ F' s7 k: o/ F! Y! G- da = (g) => {//底图绘制
4 C }* m: n1 ]4 ^ - g.setColor(Color.BLACK);
6 \/ _4 j$ a, X9 {5 V+ y9 p - g.fillRect(0, 0, 400, 400);
0 U3 r& @. b6 n* \* @, A - }4 w h5 _& e/ P& f v& A1 O- O
# C& v) O! g; q4 k: @' y7 o- db = (g) => {//上层绘制
! G5 n, U& Z3 Q - g.setColor(Color.WHITE);" O. s" n( s+ e' d0 ~5 [
- g.fillRect(0, 0, 400, 400);4 R ~: Z( k* y" A O
- g.setColor(Color.RED);
1 F' F3 _4 ?0 H K - g.setFont(font0);- ]) T" W: q$ M- i3 N7 d$ ^
- let str = "晴纱是男娘";
6 t, Y6 \' y, \0 J" f& | - let ww = 400;
4 Y+ Y$ q! K5 \# w - let w = getW(str, font0);
( T: P# A+ Z( E' O* Q5 }- G s - g.drawString(str, ww / 2 - w / 2, 200);) @0 ~1 u2 D3 X; m. D' `" J
- }
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) u* ~: e/ U w, d, k% a0 g- const mat = new Matrices();1 _, L" ~) m8 H, H: h' y
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
( B$ a% [+ h( u3 e9 W - let info = {' H9 R7 a$ N' ], g
- ctx: ctx,& L* J' p {5 r% F- [: p! B7 d; Y
- isTrain: false,
7 J2 ], s: T) K$ J6 Y1 [& f- { - matrices: [mat],, r& Y9 W3 ], j) S- l' g6 Y5 m4 N
- texture: [400, 400],
( @0 I; R: V, P1 y5 w; K/ M - model: {
9 M( g8 Y _8 Z5 I3 L/ C! l$ \! n - renderType: "light",
8 @+ _2 |% W7 S% n& N - size: [1, 1],
; K9 j. Q7 H. A; D. B3 B4 | - uvSize: [1, 1]
4 H+ r3 t* d6 R% E1 S - }1 Y6 Q- Z$ U: W. K# c! ~" n6 _
- }
7 ?2 R' n! E' P4 i+ L - let f = new Face(info);+ q( y9 l$ p; t; v/ f6 A
- state.f = f;
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- let t = f.texture;, A5 w7 X( {/ ]0 D
- let g = t.graphics;2 ^( B/ ^6 |6 b- s+ I0 D0 _
- state.running = true;
( B7 P3 p5 _; Y - let fps = 24;6 s& e) S) o! k( |4 m
- da(g);//绘制底图! p1 n, x! d2 {% t- Q8 Y
- t.upload();( q+ h% ^1 U$ i( u0 g" _
- let k = 0;
( F$ d! p" x2 D/ V6 y% R) g - let ti = Date.now();
+ F4 [7 c$ g4 A' f - let rt = 0;' S' p$ o! A; f) y! [
- smooth = (k, v) => {// 平滑变化( E! w% t4 w1 E% p
- if (v > k) return k;+ d+ `6 ]# n/ \* `0 [
- if (k < 0) return 0;
5 {; _8 J0 d' t/ h! } - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;- @& x: I. E+ b
- }- b4 d: l r! H' ]
- run = () => {// 新线程
u' i: }6 N/ ?/ |6 x( q - let id = Thread.currentThread().getId();
' F' W9 v8 O; m2 j1 p - print("Thread start:" + id);7 s. A p z0 b6 q
- while (state.running) {
& f; ^, D' K+ E# u - try {0 {; x& {3 Q& a# V, T: O R
- k += (Date.now() - ti) / 1000 * 0.2;
( W% `0 {- u1 j* n, ?0 A - ti = Date.now();
) [/ d. F: o0 R5 b9 O - if (k > 1.5) {; {5 k9 w- Q5 K( ~: Z
- k = 0;0 R) _) r9 f) b
- }
# T, p' o# b$ e/ ?' r- V - setComp(g, 1);" t0 I) P+ C. W: W
- da(g);
6 ~1 C$ e% G' s% X+ P, k% d) V - let kk = smooth(1, k);//平滑切换透明度( ~8 \8 j* U8 r% U2 y, U Z
- setComp(g, kk);8 x3 H6 P! V8 t0 P; j8 G
- db(g);0 F4 \3 }' s6 O0 n% n* X
- t.upload();
I2 _6 B( x2 Z6 r7 O: V - ctx.setDebugInfo("rt" ,Date.now() - ti);% A' B" P0 o5 g" R
- ctx.setDebugInfo("k", k);
% n; Q- r$ M. P* ~4 Q. A7 @ - ctx.setDebugInfo("sm", kk);
5 H; w8 M" a' q! ?: F7 c, g0 H, \ - rt = Date.now() - ti;4 x6 d0 Z6 I5 o* ~5 x
- Thread.sleep(ck(rt - 1000 / fps));2 G4 v) m4 A& [! Q' F( R& g
- ctx.setDebugInfo("error", 0)
# z0 V. r3 b$ q( C- {+ {0 a - } catch (e) {
" s6 d) l% o& S7 r - ctx.setDebugInfo("error", e);7 q& k# S+ I1 [, p
- } E8 d4 ]+ Z$ S5 G; }& Y
- }- R% l( M) W' W* R/ D6 t
- print("Thread end:" + id);$ t1 @8 g' a; M# f: l
- }
3 g2 v0 L M- l+ { - let th = new Thread(run, "qiehuan");+ h* e" b7 E- s7 H
- th.start();
& G$ R% P" c0 r - }
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* {$ k: j* e! m" B" V- function render(ctx, state, entity) {
: J# X0 m) H$ u# T! m( L - state.f.tick();
# `3 D- F# J/ X2 o3 z5 I) D' y - }% K1 X3 J3 f o9 G; }
/ ?, B8 Y% Y: s. r- d4 ?5 F5 E- ?0 [- function dispose(ctx, state, entity) {# y7 v' d/ w+ V$ H- L% a, c& P& U
- print("Dispose");4 [: | _1 k" |7 s; C; Z( h
- state.running = false;
$ T; ~: q, A s, r- Q: f. P3 n9 ^: S - state.f.close();$ r7 i' F. U5 I4 b% ^
- }$ e2 B: a. x Z O: @# h1 Z9 X6 g
- 1 Y* E4 ], X( _
- function setComp(g, value) {
3 v* u( A1 N& B3 N2 T: l* I: _6 H - g.setComposite(AlphaComposite.SrcOver.derive(value));
1 p4 J9 I# y7 w1 Z/ _ - }
复制代码 , Z( W, A4 z, K: E! A2 @
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。2 k3 D/ l" c2 { y
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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): B% p+ v8 `; d# `5 W/ Q
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