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( o4 `* h9 B4 b5 W" [- h3 v7 _" b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 G* R) B# t N1 H! b- importPackage (java.lang);
. j- b% u' b N5 j1 E, r8 K - importPackage (java.awt);
- p6 A b# U; z, |1 k - o4 g# }; o$ T! y0 c$ t% W( t
- include(Resources.id("mtrsteamloco:library/code/face.js"));, s }, h- Q/ P! _9 q
. H5 I" H7 \* x- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
9 s5 O4 y8 B6 j) q5 R; x - ) j I D7 Y: Z' [7 @8 K+ S8 ^
- function getW(str, font) {
5 ?$ q$ y* m# ^8 z - let frc = Resources.getFontRenderContext();; [1 {3 p, W3 e
- bounds = font.getStringBounds(str, frc);
& U; x: N# o! o - return Math.ceil(bounds.getWidth());5 b7 N5 {8 B5 ^# _
- }/ h1 T. U; I$ c! b7 |
- 1 g! a& S x6 s/ b7 ^1 g0 N
- da = (g) => {//底图绘制
4 T a' J3 Y$ ^ \8 z) ]# |" Q - g.setColor(Color.BLACK);
1 }5 U4 a! S; F - g.fillRect(0, 0, 400, 400);7 X% |: f: _& y9 _
- }
' E+ c5 ]& D3 f, x& t, {' k7 B/ w( P) o - , W6 y. R9 w: K; T* s- w
- db = (g) => {//上层绘制
& F4 v* m; ?0 C @; W( V - g.setColor(Color.WHITE);+ ?7 E% \" \; {" o4 {+ a: x9 ~3 ]+ S
- g.fillRect(0, 0, 400, 400);! b8 f& ]& e6 S8 S. m$ [5 h. a
- g.setColor(Color.RED);! g( `8 D; p. |- p; B4 e
- g.setFont(font0);
! M& K7 B( k$ I; Y* e9 ` - let str = "晴纱是男娘";
9 X- u4 |7 Q1 |& N5 Y" q - let ww = 400;
- F" W! F9 e) H8 \/ j - let w = getW(str, font0);8 L5 u v6 g& J( e- t u
- g.drawString(str, ww / 2 - w / 2, 200);
7 M: Z2 R. S* B - }& A( e/ Y$ w) [' O
% O/ b- P8 m9 n% ~5 r$ m- const mat = new Matrices();1 e" S# N- b+ b8 b( Y
- mat.translate(0, 0.5, 0);) ]" O. a9 F5 K$ Z* o1 y
0 Z! z4 y6 P% e* k- function create(ctx, state, entity) {
4 [! L: ?, x1 _& ^/ p - let info = {+ Q) @$ z. t6 c# @
- ctx: ctx,
# w9 _/ t% Y& k9 D- H5 ~3 q4 H# Q - isTrain: false,% o& v+ W' i2 x0 e) c i( h
- matrices: [mat],5 b+ h* t- @( a) ~+ V& x# f
- texture: [400, 400],5 X- `# B7 y8 k) T
- model: {* L Z' Q$ A+ v0 F. d
- renderType: "light",* n; t; s! r- G6 `/ u9 g: C$ y" n9 |0 r
- size: [1, 1],9 Y, f! K/ E* O% M Y- l
- uvSize: [1, 1]3 q0 J g, U5 S/ d U! b$ \
- }1 B, g5 |: K' S' `/ [; {, S+ `7 ~
- }
+ P8 T( a8 l, t) a( v% ~ - let f = new Face(info);
. m) z! C( e. F* T - state.f = f;: v: Z9 b6 Y3 r& g# K* w: h
- 9 P- [2 [+ c- P5 P
- let t = f.texture;! O' j3 Z5 Z+ g8 n x2 z
- let g = t.graphics;, E9 u9 B q7 L: E( i8 b
- state.running = true;
* H1 l1 s4 K$ d3 F+ p- F - let fps = 24;
- c8 @2 v- j4 p- t# N - da(g);//绘制底图: e, o" w4 }* s0 {* q7 b- O
- t.upload();
7 d6 E# \) y' I# L - let k = 0;( {) G1 ^0 K! K. {4 ~
- let ti = Date.now();
4 x* t. R7 [( K6 i6 c& o6 u - let rt = 0;/ N3 m8 e+ M, Y6 u7 G7 O+ Y
- smooth = (k, v) => {// 平滑变化
" J& G+ F9 q% P9 `. c$ `- U - if (v > k) return k;
. K/ I% }# u' U" \ v5 m - if (k < 0) return 0;, v* t4 M1 x& c% m: q
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;- P1 ^$ H; W. O
- }
8 w! Y) @2 x5 ?) o0 K$ x' R% h5 n - run = () => {// 新线程5 m8 X# x0 g$ p2 T( o
- let id = Thread.currentThread().getId();
6 P" b/ M8 V; N# T - print("Thread start:" + id);
: J/ Z7 a! }9 D5 c/ [ - while (state.running) {
% G' x" h- y4 [: q - try {
9 m, ~! J1 f: a* [+ A - k += (Date.now() - ti) / 1000 * 0.2;
/ R5 z$ n2 f# [0 a: | - ti = Date.now();3 v6 H9 O5 T5 \, l( i& ?
- if (k > 1.5) {
' d0 f/ J" w7 C8 | h$ L3 X - k = 0;
; }4 H, V1 x5 ?9 \( w - }% e! L+ K l- _4 [/ C. B
- setComp(g, 1);
3 P% ?" }7 u; H - da(g);
3 s. H Z; N7 k - let kk = smooth(1, k);//平滑切换透明度$ s& L- L4 v7 k) X; q
- setComp(g, kk);6 L' J- c/ @2 w; T* v' i/ E
- db(g);
4 G# T; r0 e D3 ^/ f- d - t.upload();
& J( T2 Y# P9 S1 V$ H2 b0 d/ P' \: i0 c - ctx.setDebugInfo("rt" ,Date.now() - ti);0 Z' Z4 B# p' g; d% P, A
- ctx.setDebugInfo("k", k);
% t! I: o! t7 P. T6 h - ctx.setDebugInfo("sm", kk);
5 m* q, X' e& m# `9 a - rt = Date.now() - ti;
8 E# y8 ]) Q! R4 k: p6 f: e - Thread.sleep(ck(rt - 1000 / fps));
2 K' m- T* y7 F3 ~- n - ctx.setDebugInfo("error", 0)- Q" n" }/ H3 N5 B( w
- } catch (e) {& k: e; M u* c7 g$ [
- ctx.setDebugInfo("error", e);
b5 K& G6 R: @8 {7 p0 I - }
6 Q( R% l2 u+ C; N - }
; F r- o: {; r6 f1 L, [, w - print("Thread end:" + id);; T+ ?0 W* b( F& D7 z, N
- }
: M: E% h1 }% d' m9 _/ m - let th = new Thread(run, "qiehuan");
5 Z; _" p9 e" c0 U3 F ~- t - th.start();8 p" ~; N7 j5 M% h+ t6 ^; W& u
- }
) q6 D! y0 W: y( p2 s8 _) g: p - + w( z6 @* U( o+ ^- D; Y) t
- function render(ctx, state, entity) {* g& [! q2 e: s% q4 u
- state.f.tick();
7 ?- A/ L0 ?6 ]. X* D9 a - }8 |! Z! c0 z J/ y8 ]
- ( [0 Y8 {. K- K( p, {6 o
- function dispose(ctx, state, entity) {
- o9 w+ z/ M }4 A5 G0 G& J$ K - print("Dispose");4 z- a( |: Z$ Z+ I% P$ k
- state.running = false;
' Q3 O& t2 ~0 T8 H8 f" v: d - state.f.close();
2 r" }0 l6 F& E) i& C' G - }* f+ ^2 }, B& _ Q9 H$ w
4 ~- S) X) h9 g: K5 v- function setComp(g, value) {
/ G0 h: P$ T/ J8 }0 t - g.setComposite(AlphaComposite.SrcOver.derive(value));9 i. `& \) s& N! X6 F
- }
复制代码
- i5 S; w0 C Y9 ^, d* ~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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: r( J$ w& S6 ~, F8 v: C, v! y% }* C$ P" T; V% {
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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