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, `! I$ j5 Z% d1 J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 _1 j+ ]. r. Z# Y* }5 z
- importPackage (java.lang);
& ^ e" h" A, k; j5 F& ~* e - importPackage (java.awt);3 c* g$ n9 z7 o" m0 r$ f0 f
; C5 P. O' j1 _/ ^8 `% s# s- include(Resources.id("mtrsteamloco:library/code/face.js"));$ M- k! v/ e, M& q* J
- 7 r$ l, d: {6 j) S9 l/ j
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);& C' J# j7 q5 V2 j; L. [
- M8 M: `$ S" _& v- function getW(str, font) {4 ~) x, p) C" b
- let frc = Resources.getFontRenderContext();
1 a' L) `$ |- Y9 }- q3 _% t - bounds = font.getStringBounds(str, frc);
- }" c8 X6 e6 ]- k - return Math.ceil(bounds.getWidth());
. l i8 A: j% v* o - }: J0 }/ n' L- \6 t" u2 L4 {/ k
6 t: S% b8 E' K8 ^- da = (g) => {//底图绘制* T0 g( ^8 N0 P& p. D3 D6 T
- g.setColor(Color.BLACK);0 z0 b3 v6 J6 n) S- n& i4 m
- g.fillRect(0, 0, 400, 400);) R! {" U% x! |' w" D T
- }/ q1 W! q; m. {
+ |, k8 z2 `+ g1 r- db = (g) => {//上层绘制
5 k" y; g6 v4 x8 H. l( t - g.setColor(Color.WHITE);
9 [3 M3 T0 I2 T- J+ ? C - g.fillRect(0, 0, 400, 400);: {+ g6 R1 s+ ]) U: G: W1 b# \: ^7 |) T
- g.setColor(Color.RED);" p! r( W# {$ n- s% \" W3 F4 X0 i
- g.setFont(font0);
. s( V; E9 @# g% ^( m C/ P1 P - let str = "晴纱是男娘";
1 U) E+ [/ b2 V2 Y- n# `, {2 i - let ww = 400;
) e: S- A' p3 F; H/ [2 U, D - let w = getW(str, font0);
8 h, d& [8 B+ Q+ d# {6 G% x - g.drawString(str, ww / 2 - w / 2, 200);
( A& C! Y) j* q8 f0 {, i. S; q - }; A0 y" U/ j0 y" V' e
- " X7 R8 g" |, _9 J6 ?3 @8 w
- const mat = new Matrices();
. P7 h- }& [9 {( K" n) C0 q - mat.translate(0, 0.5, 0);" d# g, J" |8 z" Q5 L' I2 q W; Q/ H
6 e$ A3 A' ^5 A9 `- function create(ctx, state, entity) {
3 C- i& r: J, @9 Q. I! T/ ~ - let info = {& w K, O2 I+ g% k$ P% t4 J
- ctx: ctx,
- @6 u9 v$ c# g1 O - isTrain: false,; x x0 ]5 D+ [; v! h3 T$ q2 J
- matrices: [mat],
4 b' u8 N" `; v - texture: [400, 400],
- n0 e U/ p, h6 a- w - model: {$ F5 d1 ~- f w( _
- renderType: "light",) I6 n5 i% X' P# V
- size: [1, 1],
6 c' H- }8 Y9 y' M* ` - uvSize: [1, 1]
+ G1 G9 d0 ~1 V3 i - }8 M6 t$ a8 _9 h
- }
. L& D; N" t! U2 J3 p W8 X: y - let f = new Face(info);9 k( a( \- a( {
- state.f = f;
& L+ V3 t; K5 G: q0 h' |& d2 J8 a
) C4 t- m" ?* d- let t = f.texture; k4 I0 t. q1 B" b2 `, o! P, T
- let g = t.graphics;
" K; V" `, c6 b$ o. G - state.running = true;8 J% ^2 g+ s) B* y: i$ e
- let fps = 24;4 x& X: W1 j: B7 U3 l1 {3 i
- da(g);//绘制底图
( G, \3 y1 L2 Z$ M0 z+ v8 ?, f6 } - t.upload();
4 \ h4 J5 G0 G) I - let k = 0; p0 J7 l5 X: u- a: C, W0 m. ?
- let ti = Date.now();
! }/ @( Y; I( ~7 E8 k - let rt = 0;$ z/ y A& X. }; E4 f7 X2 F8 D) B
- smooth = (k, v) => {// 平滑变化
/ V8 `) H& y& A6 H - if (v > k) return k;% E, J: w- L# w! a9 p# l
- if (k < 0) return 0;% U& K: s- F# B6 k& w
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;. L# m* L4 j& Y- f
- }' N5 d0 L# O/ `! v2 q0 ^6 a
- run = () => {// 新线程' T! L4 k& w" N c, \6 i! W. i
- let id = Thread.currentThread().getId();, w; r0 w5 P; G$ j% E3 Y* M, _( q
- print("Thread start:" + id);2 d1 [1 m% J4 U1 L
- while (state.running) {* N7 U/ X# S6 \: j9 k. f
- try {
$ }5 m2 V: T: S - k += (Date.now() - ti) / 1000 * 0.2;* O4 k( Y6 Y! y8 e: N0 w% |
- ti = Date.now();2 y* U8 I* ^5 t) g8 n1 R
- if (k > 1.5) {
% K) S% [. I# ~ - k = 0;) V c. x( n- v5 T5 ^
- }
" b; v* F d- m$ i4 N% Q; K s - setComp(g, 1);
# v! X h9 r7 j6 G - da(g);8 U9 a% x% ?( Z5 q
- let kk = smooth(1, k);//平滑切换透明度
2 s8 n4 O1 G) |/ F% }: k - setComp(g, kk);* {% G6 K: u, ]2 X, H
- db(g);
, c! v- J* X4 D! U2 D - t.upload();
' @: ^% Z0 f3 w6 t/ d# r& M X - ctx.setDebugInfo("rt" ,Date.now() - ti);
* E' W) ^1 p8 l) o* S - ctx.setDebugInfo("k", k);
8 Z. `" i8 {& f V+ R3 G* M - ctx.setDebugInfo("sm", kk);
8 {) a( \% v3 f5 W- t - rt = Date.now() - ti;) e% F" \/ q& G6 t) L
- Thread.sleep(ck(rt - 1000 / fps));
! z0 m% I" N7 J4 F3 H - ctx.setDebugInfo("error", 0)
6 N h+ ~0 N# o: p) d/ X$ C* ` - } catch (e) {
" E9 G/ P2 O) C& D6 i2 w - ctx.setDebugInfo("error", e);
, o* I' u& F% v2 s( X - }" O& s. ]$ [; ^1 t, p `) E
- }
# e0 s( `1 H k4 w5 U& L" o - print("Thread end:" + id);
9 ^, h- f/ b7 g9 a: K) B - }9 z0 K7 V) \6 ^: O
- let th = new Thread(run, "qiehuan");
+ a2 Q% f3 T/ v, j/ n# |# [ - th.start();% h- q$ ?- m* h
- }
7 H9 x! u2 A( X3 l" \" K& ]2 I, n - i& _: K1 n- y4 b8 V
- function render(ctx, state, entity) {
9 J+ d/ a9 }0 ^7 k7 I& v - state.f.tick();
3 Q- q: ?( ?3 o - }
# a- ]& V" u! O6 L - + R4 f5 s( l& ~+ j1 b
- function dispose(ctx, state, entity) {
( o t0 ~% @! s - print("Dispose");+ o/ I6 ]9 v- L" t8 h3 @4 i$ t
- state.running = false;1 t6 u( s% Z9 G' \& |
- state.f.close();
}) S# L2 ?8 z; B3 g - }: d8 n6 R9 v; F0 F( o4 J+ @* M) U. w
0 `- H, Y- [/ T; G( F7 k* c1 f- function setComp(g, value) {( g+ _: Y& c% m. ?& [: O, ~* I
- g.setComposite(AlphaComposite.SrcOver.derive(value));
% q7 i2 |. U/ b2 v% `# s8 I - }
复制代码 * I: g4 K P. {$ K. U9 }9 l9 H8 E9 M
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 _* l# l0 }1 _& o/ ~. d
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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)0 S- a: u# I0 D7 d$ n9 @5 S5 ?5 C" S
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