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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。6 |/ u% q9 H' z- T5 @
- importPackage (java.lang);
$ ^& ^( K" V( g4 B8 l - importPackage (java.awt);1 m4 D' }2 u; x# V& T Y
1 m b8 l7 Y3 S- include(Resources.id("mtrsteamloco:library/code/face.js"));, @( u g9 r6 c0 o5 V) h
8 ~# g. H# c( J! n! ]/ q5 l( H- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);; H* m+ @0 \ m4 D6 T
O+ n' S+ l+ Q8 x: ]2 K- function getW(str, font) {
- s- G9 g7 m8 J D/ ^# A - let frc = Resources.getFontRenderContext();
$ y/ B3 F: q+ _" s - bounds = font.getStringBounds(str, frc);
2 G! e5 t) @6 e) L) x) [ - return Math.ceil(bounds.getWidth());
- P# r* A9 D- Y+ @6 m2 V$ v+ R - }; W5 u+ w) o6 b& P$ E
% I- V8 C& P" R- da = (g) => {//底图绘制3 n" `& f. }" [) I# p" g
- g.setColor(Color.BLACK);
7 V" [# Q* X$ } - g.fillRect(0, 0, 400, 400);
& h/ Z9 I. a* b) ? - }- q0 u% b K0 Y4 I0 q' j. G& d
- . m: _( {1 l" q8 u. J) b# h* O5 X
- db = (g) => {//上层绘制
) o/ m' W, h4 s7 i, p% n' U6 I - g.setColor(Color.WHITE);
9 f; x8 v R5 ^, V& ~/ P - g.fillRect(0, 0, 400, 400);
1 n2 h! j$ c. F" \, L- `0 `2 g& Q+ e - g.setColor(Color.RED);4 d+ c1 ]: C1 Q, X0 E
- g.setFont(font0);
" R6 h7 S3 H! y, g( Z2 I - let str = "晴纱是男娘";1 s8 b/ p2 L. `) i& p; i: d
- let ww = 400;
" O/ l, H) i. p+ d% |4 a3 _1 Z - let w = getW(str, font0);2 d q1 ?, ]" P" y
- g.drawString(str, ww / 2 - w / 2, 200);# t. D9 m) J1 [0 D( [5 N
- }- h) l8 I5 S: `4 O, J: t
0 l4 |0 s6 ]; g. J5 c1 M- const mat = new Matrices();, L9 v& q4 f& L( e( M
- mat.translate(0, 0.5, 0);! q3 l" w* Z% B$ X9 l s" ]) x
- # Y$ l. h; W1 f- V8 O
- function create(ctx, state, entity) {
* {! ^* p& Y& e0 M; J+ W9 v+ h; A - let info = {: M( W4 c1 N& M4 `7 f
- ctx: ctx,* d* d# b# \. O; X4 g5 K+ J
- isTrain: false,
9 t5 A% @* {' {" W - matrices: [mat],
2 b% o% k* `6 X - texture: [400, 400],& c8 h! z' L1 c" I8 @
- model: {
% R# A+ n- X( r1 g3 {' G - renderType: "light",5 c. E2 u0 K) T9 h5 J2 }
- size: [1, 1],
4 ?! ^0 O8 l9 Z; \. |$ L) @ - uvSize: [1, 1]' w. a7 J4 T9 \$ X3 J7 Q
- }
! i0 X# ]( E/ l6 h - }
/ v+ x0 I+ k& u" L8 m9 _ - let f = new Face(info);3 [* p5 b! P# p/ F" d
- state.f = f;) _! p+ X6 y6 }3 U. g( z
( b( e" R. t" f I- let t = f.texture;
3 E6 Y/ {0 f' N) W - let g = t.graphics;
& x# T- D! P4 b; @ E+ S+ M: v - state.running = true;- t: J" K0 v0 A5 N5 K
- let fps = 24;
$ n7 l0 Y7 W# g$ \8 l - da(g);//绘制底图& J1 L7 S- K& t+ y' A/ o. j* V
- t.upload();
2 i2 a: P! J T3 k# u3 s( N - let k = 0;
4 n' O# z i1 U& } - let ti = Date.now();- @; ~0 F! W# x
- let rt = 0;) Z1 A( {* a/ Y1 I) N4 Y0 c
- smooth = (k, v) => {// 平滑变化0 W, Y* M" m9 w: E
- if (v > k) return k;
; ~5 E/ S$ m5 s7 y8 ` n, v$ Y - if (k < 0) return 0;+ D; A3 K. |; u' |1 a
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
& I/ C% w% Y. o% Z: U - }: V4 r8 C5 y: b! L& e
- run = () => {// 新线程
: v& h/ @8 X- z* D' k8 K% c2 |% C- v9 D4 q - let id = Thread.currentThread().getId();( _7 E$ g) t, k
- print("Thread start:" + id);
1 j5 [! c& m8 H& G" h' u5 h) N( p - while (state.running) {
- Y# v1 {" V& V - try {
9 `# ?: T# q, T, A; _8 H - k += (Date.now() - ti) / 1000 * 0.2;( L; |7 E* Z0 D6 o9 b7 U9 {8 G( S: q
- ti = Date.now();
/ U/ f/ e. m; y7 `% c, p2 F( c- X - if (k > 1.5) {4 \- I4 E- h: Q8 o1 w
- k = 0;/ `" ?3 l& M+ e) ^! i* B
- }/ l4 r1 H0 C2 a5 O( o
- setComp(g, 1);* H4 h1 b9 o7 Y* D1 f9 j+ ]7 N( J5 a
- da(g);) p6 ^9 Z$ p' W
- let kk = smooth(1, k);//平滑切换透明度
: i9 y6 H8 f% |; d) V# B Y/ f - setComp(g, kk);
, B* ?/ ` I" D+ l% ]; a" @ - db(g);
. b& {8 V" ?4 d1 J' k- l7 S% ^# z p - t.upload();
5 _, h7 }- V: x - ctx.setDebugInfo("rt" ,Date.now() - ti);4 L4 k) R( ]( H: Z& E) @
- ctx.setDebugInfo("k", k);8 R& c5 r8 j+ S* e5 W1 Q& w
- ctx.setDebugInfo("sm", kk);/ m. }+ j8 D3 N. `7 C; x# w7 F2 j- Z
- rt = Date.now() - ti;
( S9 c' t( g* d7 ~4 | - Thread.sleep(ck(rt - 1000 / fps));
; {# }4 J+ v8 B" g6 \4 R F - ctx.setDebugInfo("error", 0)
4 g5 S3 Q' t8 ^6 Q" R% n) V6 j - } catch (e) {5 { b' `$ b3 R0 F& T7 T" L
- ctx.setDebugInfo("error", e);. R; k4 F( @" @4 U1 d
- }
, G4 C! o) H4 u# _( \8 J - }
# m6 Y, R+ K. l( x' f) `% V - print("Thread end:" + id);
& j4 f8 B) m; ~: n0 d5 g - }
/ m2 m: G3 f- X, M9 H - let th = new Thread(run, "qiehuan");
& W! C- F9 q1 L# J9 e2 ~2 M% i. L - th.start();
) k) j$ d2 c0 |: X5 f) g( y, @* [ - }
) u( s I4 j y! s( w$ g- Y - ) H) ?' F9 B) L$ b7 e h# R
- function render(ctx, state, entity) {7 n% P: h* R4 {
- state.f.tick();
, o! ~+ A$ [/ w - }, X0 a. g. A( l& K
" a3 c& p+ K9 z7 |; _2 x- i; F- function dispose(ctx, state, entity) {
3 S4 l' }* U, l& V) i, \0 H$ i X o4 u - print("Dispose");
2 f: x- R- W" C1 f - state.running = false;
6 j# C" ~9 l- b W" e- C - state.f.close();6 x: |- ?8 a( ^+ C
- }6 N" t" \- F2 V& @
- # i1 ]4 ~* K) `* y
- function setComp(g, value) {
0 u; Z5 H+ S' \1 H1 J. t - g.setComposite(AlphaComposite.SrcOver.derive(value));
* ?# l2 d% a0 k9 J" p5 _ - }
复制代码 + s% Q2 z, _0 W: t. Q& O. ^
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。3 i: ~0 f6 h2 m }) |
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6 I8 e+ X1 V" ~9 ]" y8 Y; D" Z顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)) U0 ^" y R$ p: _
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