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p/ N: [, y" i+ P2 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。+ \2 f2 @. ~, M5 f9 z% h/ U$ [
- importPackage (java.lang);
F4 `2 p; t4 \5 }, C, k; W - importPackage (java.awt);
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$ e8 S4 [$ n7 \- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);2 F. K2 q# {& F2 U' I3 S g4 i( L
- 4 t! F7 h5 P& v: `! J3 g
- function getW(str, font) {" `# }& X) r! K5 B
- let frc = Resources.getFontRenderContext();6 P( `7 i' H- u
- bounds = font.getStringBounds(str, frc);; j2 {% [4 v0 S# p& d- j: P# d1 |
- return Math.ceil(bounds.getWidth());4 s. J8 u# i# u1 G
- }
9 ^- t+ \9 a% b
& C6 |: D" A8 D, D- da = (g) => {//底图绘制
# {+ J- h; b0 h1 @& I& c - g.setColor(Color.BLACK);
7 `* Q* u7 Q# z; S) _; J - g.fillRect(0, 0, 400, 400);" J, ~: g# G& X: w1 z" \- L" z
- }; a6 G, \. }) R z" C8 e
- * v( m J2 B8 v9 ]- E9 ?
- db = (g) => {//上层绘制
% H7 N; A, V4 @8 N, ?- b - g.setColor(Color.WHITE);
# g. e7 I g Y/ B - g.fillRect(0, 0, 400, 400);
, M. E8 D7 A! q& ` - g.setColor(Color.RED);
! @# ?5 a" n, [ H- O; s - g.setFont(font0);, X6 Q; S3 |/ x* W. N
- let str = "晴纱是男娘";3 H- j8 p0 F) a: c/ P" \; F3 u; l
- let ww = 400;
7 J: V4 s8 V6 U8 ~; s. u - let w = getW(str, font0);8 k4 [% s3 t( V1 G, f3 Y
- g.drawString(str, ww / 2 - w / 2, 200);
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- # Z' _ d* {. I I# n* W. [
- const mat = new Matrices();% _+ N5 Z$ h% b( j. e5 @5 G
- mat.translate(0, 0.5, 0);0 k/ D% |% C1 G J
- , d% H* y2 {7 e5 D4 y' t; u/ q
- function create(ctx, state, entity) {
% s& n5 e" K7 t$ _ - let info = {6 }1 }& X% h8 _3 P, Q
- ctx: ctx,
! [! q' w, \( i8 k% v6 \ - isTrain: false,# x# d0 w) R: u6 D' Z @& N3 o
- matrices: [mat],% ?: H+ S! u' c: B5 }
- texture: [400, 400],
}: L3 \! _7 z4 z+ g - model: {
; [0 W3 _, q) [6 ]$ P2 w, v - renderType: "light",
( V6 n+ Z3 F- @/ h! Z" h& c/ E - size: [1, 1],2 E* ?: j- \. \, U( Y
- uvSize: [1, 1]! W8 m6 |" L% F
- }; `, e" k, @1 e @
- }' y& p% z# X0 N% ^$ b! j% k
- let f = new Face(info);& E# m/ w* N7 X9 h# n
- state.f = f;
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- let t = f.texture;. \7 K7 O( X# C- `
- let g = t.graphics;/ ~4 M. L" O+ G1 r0 U2 `+ W
- state.running = true;8 L' z" c3 w; K# J( B- p# C
- let fps = 24;3 C/ ]5 B4 S. X- i$ V
- da(g);//绘制底图) q+ V+ W$ m( g6 N" w4 M
- t.upload();
& y, ^+ G9 ~' b$ E& t9 P9 E - let k = 0;
) K" J1 Q/ }! P) g. _, t. c' q - let ti = Date.now();* O2 Q+ e; V4 A3 U2 q, ?
- let rt = 0;! L* n& d) @& Y
- smooth = (k, v) => {// 平滑变化& c7 m+ E, D6 v( ^' W& q6 @
- if (v > k) return k;+ r; t: @/ q, ]3 s9 U8 S* p
- if (k < 0) return 0;
; a4 A0 K& h- A6 N+ x X9 L - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程' D0 Q; z7 o0 Z- {3 q1 [" B4 @
- let id = Thread.currentThread().getId();
3 U. X5 c, t" d. U U1 m8 N: j - print("Thread start:" + id);4 J: H8 v( w! _8 e8 s" p U! I9 U
- while (state.running) {4 o9 B9 l/ J: G3 M
- try {+ d' g' B, O1 M, I
- k += (Date.now() - ti) / 1000 * 0.2;- [, T( c0 V+ a+ Y, F& z
- ti = Date.now();' H4 g- w {; u7 v% H
- if (k > 1.5) {" \+ R4 C" B. R' d# z9 `8 t
- k = 0;$ ?% |% O6 l6 e8 }( @
- }, ?3 J9 Q$ D9 G2 g I- F7 ?# s
- setComp(g, 1);2 J2 ?$ g1 c2 U* S$ A8 r3 S5 R
- da(g);! i3 H G& s, [- M7 c
- let kk = smooth(1, k);//平滑切换透明度
6 U+ M3 b& T# u6 ?2 E - setComp(g, kk);
2 }* w" Y' d& c - db(g);5 m0 \8 e; r2 d4 y) n& R
- t.upload();
; V; X& H9 T2 U6 P ] - ctx.setDebugInfo("rt" ,Date.now() - ti);
& r" z- a1 E; @% w/ |' s - ctx.setDebugInfo("k", k);
. F; z% J4 L4 j$ _" \ - ctx.setDebugInfo("sm", kk);
|$ q& ]0 u1 a/ j5 l - rt = Date.now() - ti;" C8 l. n# B3 Y+ t; l' o( b) t- r, Y0 u
- Thread.sleep(ck(rt - 1000 / fps));! c1 T, w% r3 z* Q5 `
- ctx.setDebugInfo("error", 0)1 @* C5 J; C. s! w
- } catch (e) {
" e, {9 i- a* l - ctx.setDebugInfo("error", e);0 L2 x, y; X5 G; R; |# V
- }
9 b7 |. Y q% W S/ U& n - }9 p: u7 C2 X% d: B. }3 Q- U- m( s
- print("Thread end:" + id);
+ q; r* A1 _: o1 C7 n' P - }
( F6 ~, i7 ?' _3 K! A1 ^ - let th = new Thread(run, "qiehuan");5 A+ z3 d0 ^- h4 {, T/ h" h
- th.start();2 R6 o0 O* y" W, D+ |
- }1 m0 `" |! q8 O; r- u2 `) ^+ n( R
$ ?1 F& ]0 L3 r4 [( j r/ Z6 s- function render(ctx, state, entity) {# d9 j1 \2 ^' e
- state.f.tick();: l& w4 z+ q; _5 [1 n
- }
* K) l; a! e9 F; f
' z7 y6 o `! n% R- function dispose(ctx, state, entity) {
+ Q! |' N( {% n/ c - print("Dispose");
6 Z% z+ v3 b" w$ z! D+ u - state.running = false;
3 F* h" L1 C% [6 x! H7 x - state.f.close();" i4 k6 f0 s1 t/ F
- }
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- function setComp(g, value) {
+ m# e5 G8 `3 S. ?* X - g.setComposite(AlphaComposite.SrcOver.derive(value));1 f r& U3 k& J
- }
复制代码 " k8 B% U5 a6 r; j8 e% Q+ `
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。; t/ t, } Q: f: O& E
3 A/ e$ P6 `. Q3 j) d5 i" {: \1 K$ d$ [
1 F' P8 m( l4 X( y3 I1 x3 I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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