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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。
) r* s- o- C7 P4 [# w/ C: ~- importPackage (java.lang);
7 s0 g& n. Y& Z - importPackage (java.awt);
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; B0 _3 m' k: T; v- include(Resources.id("mtrsteamloco:library/code/face.js"));
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9 m- ?# P* \+ \) _2 J- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, Z6 s; T! ?0 V' ?% i1 v
- * ^5 o' T6 c. k; v( n" o4 u% w
- function getW(str, font) {
" ?& l9 N# F) B' x9 l3 b - let frc = Resources.getFontRenderContext();; Q- [3 ]5 X. n, o7 ?
- bounds = font.getStringBounds(str, frc);( h* k! {" q/ y8 a1 D, e6 P) ~ w
- return Math.ceil(bounds.getWidth());9 u N2 Q4 ]& x& Q; R: T# n
- }5 l8 p* u5 G/ a' u( y, T1 t2 e) Y
- 5 a5 K( ^3 h G
- da = (g) => {//底图绘制
2 R9 j* _& F( D+ u2 b# w5 m! M - g.setColor(Color.BLACK);% @, Y. Y0 f+ B: _; G2 ~
- g.fillRect(0, 0, 400, 400);0 ?3 Z$ |! h( i5 c; L
- }
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- db = (g) => {//上层绘制3 k/ y& z+ r* ], I. _5 d
- g.setColor(Color.WHITE);5 T9 e- W' p* |- r8 s4 r1 q
- g.fillRect(0, 0, 400, 400);! P5 K7 g- M& F8 ?- G
- g.setColor(Color.RED);
& @6 ~" O9 }' Q b M - g.setFont(font0);: [/ g" d2 c' k/ j& b8 |3 f" R5 F
- let str = "晴纱是男娘";: E4 W# y2 p0 O& ]; {' L7 ?
- let ww = 400;
8 q$ O. I0 Z% N% P& C; c3 k - let w = getW(str, font0);2 `; p' i7 L% U! L* E/ f
- g.drawString(str, ww / 2 - w / 2, 200);1 v: C, b# d; m. w3 x( t3 A) Q& c/ u
- }
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8 J" @$ T! S( P( a2 O* l! X- const mat = new Matrices();
/ g/ y+ B5 s O- Y; }5 E, D( O - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
* `, G% ^0 P6 n0 O1 { i - let info = {
l1 O5 n# c! k# b - ctx: ctx,3 p; R, Q9 {6 V6 X- z
- isTrain: false,% }8 ], e# m! H* W) I, r
- matrices: [mat],0 |; [4 A) \! o2 `" L
- texture: [400, 400],
8 ~+ B. B/ d4 d' J" b4 v" j - model: {
3 l4 M b' }) A' I - renderType: "light",7 Y* }+ L9 q5 A
- size: [1, 1],
4 U: x, b- `- T- g+ l - uvSize: [1, 1]
; m+ l, u) q7 h - }
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- let f = new Face(info);
$ _+ Q2 b% D- t - state.f = f;
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- L2 ~, I- }, U" N0 ?- let t = f.texture;
h! G6 |5 A( u6 i2 p _ - let g = t.graphics;; R) y9 F8 J* u
- state.running = true;
- g; }4 S' P, U - let fps = 24;6 _: B8 v7 n& X- W. \! V4 d
- da(g);//绘制底图
2 v0 p0 g+ D3 c9 s$ Y - t.upload();4 d Q$ K! @5 Q$ g) S
- let k = 0;
7 ]7 p% B5 T, a& |! R" ^ - let ti = Date.now();
$ f5 D3 v& X& ^9 q6 a, s$ n - let rt = 0;
1 ^8 b2 W Z: I, T: Z i @ - smooth = (k, v) => {// 平滑变化9 L) o9 R4 Y; u+ _
- if (v > k) return k;& n K( u. b4 ?6 T
- if (k < 0) return 0;+ i8 v5 X( g. i- \' R
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程' b6 H4 D2 a) Q. k% Z
- let id = Thread.currentThread().getId();
8 v% B& x8 y1 ~ - print("Thread start:" + id);
- y. e3 v9 y! Y: k/ [+ g' g - while (state.running) {
4 f% h0 u0 P* V- e8 u2 L$ Y4 T - try {
' W' U* Y9 c+ M2 P - k += (Date.now() - ti) / 1000 * 0.2;1 X3 B& ?8 Q( |6 ]
- ti = Date.now();' i' S. A# N8 L! c4 B5 y4 T+ H
- if (k > 1.5) {
8 k4 m5 g- `6 I6 L! l. b1 t - k = 0;9 Q9 [- H) B, u$ z8 F0 ~: f0 v
- }
4 R- C5 A( H" w0 d; j% y - setComp(g, 1);: P( j; s3 h# r) }/ u
- da(g);
4 j% u1 b9 V5 s& @( X }. W - let kk = smooth(1, k);//平滑切换透明度
- p# R7 d1 Y9 k - setComp(g, kk);
" X G A" \3 i% d1 Q; ~$ J - db(g);
" w* {9 b( M g - t.upload();2 e5 ~% o" f7 W! Y+ |* h
- ctx.setDebugInfo("rt" ,Date.now() - ti);
! ?; z$ s4 e9 U' G6 d - ctx.setDebugInfo("k", k);
) B- n! e* U$ \/ y4 l: l - ctx.setDebugInfo("sm", kk);! U" Z4 @6 ^% Q; Q* x4 t! \0 J0 ~
- rt = Date.now() - ti;
% z' a- u/ {# Q9 m7 h - Thread.sleep(ck(rt - 1000 / fps));
7 [! l, ?# G( K - ctx.setDebugInfo("error", 0); m- M, s9 B) Q; j/ W
- } catch (e) {% {# h3 g; v2 u9 A4 M$ r' Y) v
- ctx.setDebugInfo("error", e);
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- }! M( \$ z$ U4 u8 }" x+ N
- print("Thread end:" + id);
3 r p6 x6 V5 x3 _/ Z/ d& S; a - }
) ?5 `7 D& P/ D1 Y - let th = new Thread(run, "qiehuan");
$ o9 h$ \3 A& N. a) o5 w% C7 x$ r9 j - th.start();' h7 v* e. }7 z; p. F4 Z
- }/ t9 w- J J9 O5 e2 `+ e
1 V9 i" B P- V. X& A" m; ^- function render(ctx, state, entity) {
5 j! {/ n9 i- \. K - state.f.tick();- `+ b1 N4 T, r# x U6 B; Q; ?, k
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+ t) j, l. v5 n2 I- function dispose(ctx, state, entity) {
1 r: O0 T0 u; n' p: o4 P( o; b0 Y - print("Dispose");
$ b0 r8 p2 \: R/ v - state.running = false;6 _3 H" O0 T7 G
- state.f.close();
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- 0 F4 F4 J) z/ g* r8 k( m: `* l K
- function setComp(g, value) {! o; w$ x% x1 t0 c2 E1 w
- g.setComposite(AlphaComposite.SrcOver.derive(value));4 p# S+ Z: {) g# f3 v
- }
复制代码 ( `; [2 E8 a6 w P! W
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。+ U9 U2 I0 s3 \& _& y6 X
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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)4 Y! `3 f. @6 J* n( h6 f
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