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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。1 W& A4 F: v4 w, N
- importPackage (java.lang);
( g9 R' Q( W& n: r- }5 c5 S! r - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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2 ]' p- M+ ~3 [) W0 R: i" w; B, p f- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( K9 x' N) i, n: V }. k9 Q3 h
9 S6 a) O" s, r& C( ]- function getW(str, font) {) B2 G( @5 B& Q1 @- d% |
- let frc = Resources.getFontRenderContext();
) [8 ~# n l4 ~0 p - bounds = font.getStringBounds(str, frc);
3 L; ]7 Q# U% A2 s. ^ - return Math.ceil(bounds.getWidth());, G( v4 p3 w3 a# `* ]5 n9 O
- }
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5 F8 L9 N; `$ \5 u- da = (g) => {//底图绘制
, b4 Y2 Q3 B4 I4 s5 x7 t - g.setColor(Color.BLACK);! D; R/ k; U, r E& V# I8 G6 J
- g.fillRect(0, 0, 400, 400);( i8 O. `; A( H3 o
- }
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- db = (g) => {//上层绘制2 w8 c( G- W, M$ T
- g.setColor(Color.WHITE);5 ~2 e5 s) d2 c2 p7 u
- g.fillRect(0, 0, 400, 400);
. F$ N |! Y3 w/ g - g.setColor(Color.RED);
0 ]3 u# X* V% W! Y - g.setFont(font0);4 }. ~4 t5 v! ^! D% f
- let str = "晴纱是男娘";
2 M4 V; V- g2 r, m& ~9 u - let ww = 400;; |8 a$ H6 x6 @) q; { S0 z# E
- let w = getW(str, font0);* [! G" W6 ^' Z) @
- g.drawString(str, ww / 2 - w / 2, 200);2 f& }3 P \/ V4 a% H6 _, x
- }
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8 C+ p- u' @7 n; T$ _- const mat = new Matrices();7 T" G6 U- |: ?. u
- mat.translate(0, 0.5, 0);, T) w2 a. |1 e5 u- u+ {: V* B8 u
' F/ r2 G3 u. n- function create(ctx, state, entity) {) ~6 C* W8 n/ e0 N- V8 P
- let info = {
$ K( |7 O% n8 D4 A* @8 H - ctx: ctx,/ j4 A5 m' g( B7 a
- isTrain: false,# [; v) N' N9 R+ y3 I% _
- matrices: [mat],
! D/ a4 A7 [$ \4 f5 |# V5 t0 F/ N - texture: [400, 400],% s- n& t* v1 e* L2 {% e
- model: {, D3 |( ^- T; @/ ~0 V2 E" Z" U( o
- renderType: "light",4 F6 k+ \( W6 b$ l" b8 |
- size: [1, 1],
/ z5 {/ R8 S4 l9 O& D3 s G/ a - uvSize: [1, 1]
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- }
0 `9 R W i3 W8 ?* x - let f = new Face(info);
8 e* Y$ k& P# f8 x* _: z6 g - state.f = f;5 h1 T2 S; l& V+ c6 ]
- ' W) p; H" Q1 V0 U
- let t = f.texture;
- t% c" u( S* L - let g = t.graphics;5 d. r( T# b' F
- state.running = true;9 u6 ^, @8 K- r
- let fps = 24;
$ W: P7 l( k! J - da(g);//绘制底图
& t) |0 s4 a" p - t.upload();
1 }7 R K6 f3 l - let k = 0;$ P, P5 \! o9 B+ Y1 P: ^
- let ti = Date.now();
6 u2 Z4 n- n1 v. X7 T% H - let rt = 0;
; e# o3 R1 M9 s& t - smooth = (k, v) => {// 平滑变化2 h" j- O1 @4 z( f e C2 G& ? e1 R8 m! J
- if (v > k) return k;1 U/ O# R7 F4 J7 [/ x9 ^2 g2 @
- if (k < 0) return 0;
- |9 e+ Q+ @1 j% N! x - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
. T! X6 p/ w9 s- y5 h3 n& H4 {, P - let id = Thread.currentThread().getId();
1 A+ } U# B5 _( H# l' H - print("Thread start:" + id);
* |7 U6 R x7 w8 C7 X - while (state.running) {' {/ P- d+ Q/ V2 ?( _1 s
- try {
! r+ \ f4 X8 f8 y- H4 y - k += (Date.now() - ti) / 1000 * 0.2;; r; ~+ w( l5 C7 R4 F
- ti = Date.now();" _& M& u/ x3 n
- if (k > 1.5) {0 N: T9 R2 p: J w
- k = 0;2 N$ X, f6 F6 {% o
- }
3 Y2 h2 V( M; C4 k4 w0 Q - setComp(g, 1);
0 n/ Q: U" \' m' P: l8 l- x) O - da(g);1 R8 g, e1 G4 T+ c+ Y1 b
- let kk = smooth(1, k);//平滑切换透明度" i3 x: ~& o) b/ [
- setComp(g, kk);5 _) I1 \3 b0 n! D6 V
- db(g);
- Y9 \/ X2 ~( M - t.upload();' F( _1 m% `. A, N
- ctx.setDebugInfo("rt" ,Date.now() - ti);, {9 w9 U- b1 x
- ctx.setDebugInfo("k", k);; `6 J0 U6 O- m" D0 E! G
- ctx.setDebugInfo("sm", kk);
* i7 f8 z% ]4 z! k e, z/ [% i! N - rt = Date.now() - ti;! ~2 r1 O& a. E, ?3 k
- Thread.sleep(ck(rt - 1000 / fps));
! Y" K0 B; x3 q. P - ctx.setDebugInfo("error", 0)# `: ], m" X9 C3 O3 d
- } catch (e) {/ e4 h5 Q3 H& o6 O' v/ \& k
- ctx.setDebugInfo("error", e);) Z- W/ N7 _3 E. h* x! g
- }0 r: J, S6 U1 h
- }
' v- E' ?& U* o' _ - print("Thread end:" + id);% e4 H3 G" s, l
- }
( `7 T' F* J2 d' p0 j - let th = new Thread(run, "qiehuan");# N; Q6 ?' f7 p4 N3 L
- th.start();
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- & Z& a8 d1 x6 O3 G
- function render(ctx, state, entity) {
6 \: N* t( ~. O" f8 c9 ^* y$ R - state.f.tick();
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* O) o8 k- F2 `9 j$ y0 u# m7 g- function dispose(ctx, state, entity) {
: z2 X2 K4 Z% i0 {5 f# } - print("Dispose");4 T' u0 y b v0 k2 ^9 e% a( G% j6 J
- state.running = false;
/ W0 e0 E; a5 N' c1 i0 F8 p% K3 D - state.f.close();
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- function setComp(g, value) {% K- f+ @1 v; x9 ?
- g.setComposite(AlphaComposite.SrcOver.derive(value));
! x L6 {+ p t2 a# _ - }
复制代码 0 J1 U* s Y' O; d# d6 y
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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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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