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: k. b" ^1 u5 I! Y' ^; P! s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。9 W# l1 Y- c: L G# y
- importPackage (java.lang);% Q5 [; n9 G" Z5 N; _0 b
- importPackage (java.awt);
4 [0 F" ~$ {( v - 5 J/ G$ f4 |) W; n& f$ [. m: x
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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3 c" k. P2 k/ L. @' p- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. g! A+ X0 m2 B8 h: n4 b5 P
6 v+ g, o2 ]: t W6 l; E- }- function getW(str, font) {
' s5 n% J% f; I7 S8 C+ e - let frc = Resources.getFontRenderContext();
' m2 E+ N V- _- q - bounds = font.getStringBounds(str, frc);
' G8 P/ d4 X7 s# m - return Math.ceil(bounds.getWidth());
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' K* E. s6 F' H% Q/ y- da = (g) => {//底图绘制1 M) N. C/ N8 E& W9 G3 o4 ?
- g.setColor(Color.BLACK);
9 o& z* }* v: I! W9 c - g.fillRect(0, 0, 400, 400);
+ E' n% q( V/ ?- | - }
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- p" k3 x6 A) X+ L+ I; D0 V: T- db = (g) => {//上层绘制
) N m1 d& S6 s% t' d9 B, q' S - g.setColor(Color.WHITE);
8 K3 C, s' e" V. V; o - g.fillRect(0, 0, 400, 400);; R! a# G8 q* |% O: p' t" O
- g.setColor(Color.RED);( z. {, |9 l; Z4 R8 P
- g.setFont(font0);% A# S' z1 r6 S, x( C" ^
- let str = "晴纱是男娘";
, i9 i2 M9 R) g( }/ X- c- b$ Y - let ww = 400;/ X$ f" f. Y& j( Q! P% m, [4 x5 a" @7 m
- let w = getW(str, font0);
! J* D: b9 g o6 N - g.drawString(str, ww / 2 - w / 2, 200);3 H4 w6 k1 d+ a5 P
- }) i3 n# L# P5 |
4 C. f' l! F* T& o- const mat = new Matrices();! s0 ^" h( p& |& N$ c& f
- mat.translate(0, 0.5, 0);
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" o0 \; C% N5 k' W+ y0 w. j# y- function create(ctx, state, entity) {
6 Y7 a/ Q% N( I7 V9 P* G. ?! m - let info = {2 [: \0 B7 U+ ?$ r6 x# {4 X
- ctx: ctx,
5 B" o1 Y2 u3 [2 z% ~5 [ - isTrain: false,2 K. U% i: a( I/ ^. m" {/ r' z% q
- matrices: [mat],, S8 u, S- V, ]5 U* Q& F6 E. _. b
- texture: [400, 400],) |) U2 a K' d
- model: {% M9 ]3 X; h r
- renderType: "light",; ~2 o7 B* m( `& X# P3 O" L
- size: [1, 1],
8 M3 P# ?0 g& Y& | - uvSize: [1, 1]: L% x% q, {" l3 I: C3 ?4 A% \
- }
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- let f = new Face(info);2 M" _6 X/ [2 M! w
- state.f = f;( X, c2 Z3 a. u3 h
, B0 Q' T6 n( g! p5 u- let t = f.texture;
u4 j2 z1 A% v- J6 j# e - let g = t.graphics;
" K% S5 [5 P1 o4 Y9 L - state.running = true;) C0 U. Q& x `( c0 u/ r
- let fps = 24;
+ p* E8 L7 \8 a* f# a - da(g);//绘制底图
% Y, s8 }+ j0 W6 u: f4 Y - t.upload();$ B. u8 K, I+ X5 e& ]* Q5 \: q$ a
- let k = 0;
1 K! p$ b* l* K- P3 ^0 T1 ]( {$ Z - let ti = Date.now();
6 M/ { u- a3 ?: c - let rt = 0;
& N7 o3 L, w+ I3 l J - smooth = (k, v) => {// 平滑变化1 b1 U/ v) V% M0 s5 ~2 G
- if (v > k) return k;
# L3 R& q. A: H) |; T - if (k < 0) return 0;
( @0 A# Z' U+ Q4 a0 L& V - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;* f8 @4 g E: C: y0 l' m! [) a
- }
3 x5 d0 U, Y7 U: ` - run = () => {// 新线程
- I, H" m1 |2 X3 y( V9 q' [6 n - let id = Thread.currentThread().getId();5 F8 }0 o1 X' n! L
- print("Thread start:" + id);
" ^ q" i) L. _; l: i8 K, l3 N - while (state.running) {, I2 j! i z. I$ [" [& ~/ G1 d3 [
- try {
1 Y$ e. r: V9 H8 v6 J - k += (Date.now() - ti) / 1000 * 0.2;- ?' b1 d0 r, F- Q6 s: b
- ti = Date.now();7 r7 l% `1 _" n/ v m) ~
- if (k > 1.5) {! U/ x4 }# b3 f2 j( j, G* S$ d+ i
- k = 0;9 n& w3 C# j' o0 }5 _% s
- }( c" e0 t$ R3 z4 v
- setComp(g, 1);/ P# o! L2 g9 C' S2 W( d t4 r% l
- da(g);
8 q9 p! s0 \+ L" K" R+ w - let kk = smooth(1, k);//平滑切换透明度
8 A# Y/ O5 U. H) H - setComp(g, kk);. c& ^8 ]$ n! o3 X. M4 m$ F# }: S
- db(g);2 c9 S0 I5 T, Y `0 n. N! `
- t.upload();! p0 h- `/ ^: v' k7 j0 F0 n
- ctx.setDebugInfo("rt" ,Date.now() - ti);
0 K! L& N1 k% v: D4 d1 S - ctx.setDebugInfo("k", k);6 y+ O1 o8 X% K H% l) `$ i0 Z# z
- ctx.setDebugInfo("sm", kk);/ Q6 q3 z' b5 t$ T5 q
- rt = Date.now() - ti;7 _ s! h* |& i" H, |5 G" x
- Thread.sleep(ck(rt - 1000 / fps));
9 X. `$ n/ f, W. {9 v M+ f - ctx.setDebugInfo("error", 0)
8 c3 q9 Q. ]# H6 Q - } catch (e) {
! H2 C% I& F1 p8 m. G - ctx.setDebugInfo("error", e);
, n- Q' a: V1 i: m' S1 R: c - }
3 ?5 o, v- c5 j7 w) {* k+ n - }& d F3 {/ x0 \) u- h C( f
- print("Thread end:" + id);
8 e( k( M- X9 A/ G& b - }5 c/ g& A5 k! U0 g; A# X8 ~
- let th = new Thread(run, "qiehuan");
* Y' y) a1 Z9 T: n - th.start();1 ?5 D6 H5 t8 Y4 O) J$ P
- }, d W% A( x% N) ?
0 Z" t$ l7 k( x4 W5 J, V2 K* @- function render(ctx, state, entity) {8 S; L* ~1 A; q, d6 `
- state.f.tick();* ?, M3 R$ b0 t3 M* Z. h
- }3 ?. x r e8 v$ O. C
+ ^, a$ q. I' w3 q2 @4 ] Y- function dispose(ctx, state, entity) {) K) l; y" {& Z0 U
- print("Dispose");
# u [, |% h) K$ C" a' n - state.running = false;
: X* ?. w* i3 m. n - state.f.close();
D0 Y& @' _& }, {0 H7 b - }
$ w7 z$ D; q* f2 }; D1 |, p
6 i4 j. Y7 G+ B, S, m- function setComp(g, value) {2 e& o* [! |" g. \* f- r% E
- g.setComposite(AlphaComposite.SrcOver.derive(value));
$ }6 V2 t0 \6 u' t5 m - }
复制代码 0 h/ g+ z! i4 l% ], h3 w) x
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。' s3 o* K0 r8 t
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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)! q& C+ O9 A5 ~
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