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0 e0 o7 R; B* F& w3 j" T9 H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。& f" s2 J; }; X, h
- importPackage (java.lang);, z! o X8 {1 u) o
- importPackage (java.awt);- S& G* X5 l7 K1 Z4 M
3 p$ p" p" b' q2 O5 G0 J- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. Y% L" i& P9 J, j& |6 ~
! L# {' @5 W6 x6 }2 [ a- function getW(str, font) {
! z9 T @+ |# T" p: q - let frc = Resources.getFontRenderContext();) \9 d5 c2 s. u w+ H. v
- bounds = font.getStringBounds(str, frc);
* ^, s% T# P9 L* R; j8 o7 _ - return Math.ceil(bounds.getWidth());
" M- @6 e& c/ X. d( ?/ Z3 v9 A6 l8 m, G - }
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( m `0 u( ]6 q2 e7 E& d) o* h; o6 n- da = (g) => {//底图绘制
+ s# A1 Y3 {) b" k2 Z3 _ - g.setColor(Color.BLACK);4 s+ } s% a3 c% t6 p8 U- G/ a4 b5 ]
- g.fillRect(0, 0, 400, 400);: ]0 `: ?& O. [. @! f
- }
' k0 B& O( f' E2 w
3 y/ M8 A9 L2 K$ q! y' t8 i# Q2 ^- db = (g) => {//上层绘制( g0 o! `. E$ y$ n
- g.setColor(Color.WHITE);3 u) s& f5 n# u5 s% ^
- g.fillRect(0, 0, 400, 400);
! f3 q+ G" Y2 M% o - g.setColor(Color.RED);
" ]/ h, y. Q* C8 K' i - g.setFont(font0);
4 a4 l) ^# E! M - let str = "晴纱是男娘";
4 y' y9 [# A) `) ? - let ww = 400;0 F& s2 l: d0 @
- let w = getW(str, font0);4 ^5 C% e* t# H) G, K
- g.drawString(str, ww / 2 - w / 2, 200);2 [! `; Q% R3 n f: k; U& u
- }: G' R: r/ f5 s& F3 V
4 _$ F% ^6 U, l3 n2 J# L- const mat = new Matrices();1 g3 p% c! J* A8 K! {7 O! F' }
- mat.translate(0, 0.5, 0);. y8 R& ^ @: U
' m( [6 b2 y! ]1 }$ S- function create(ctx, state, entity) {
- @: m. V0 h0 {( L - let info = {
: V3 H! ~% K$ b" \( [6 e - ctx: ctx,% Z0 r6 o$ {3 \3 ?* C
- isTrain: false,
5 L2 |: ~' h) V# Y9 M- K. p - matrices: [mat],
$ n u" S! X+ G0 C' O: u' M1 a - texture: [400, 400],/ c! x: k( x k* d7 n
- model: {" x/ G* J! `4 b, j$ r/ M
- renderType: "light",
/ y9 Z1 a# }( f$ V1 ~1 y - size: [1, 1],
5 B7 q5 y4 n* \4 c" n - uvSize: [1, 1]/ g- u, Z S" G" G7 W
- }+ P7 P$ ~ f& Z/ v: d% s/ L
- }
& J; K( R2 g3 w9 s( C: _: @ - let f = new Face(info);
' Z+ M: m. F) a/ p. n: U' H* j - state.f = f;1 W1 U( F# G' R, C
- i" _2 n$ R4 N0 t* d8 M
- let t = f.texture;
5 s: b) ~' R x8 Z, S9 r1 D! \ - let g = t.graphics;8 q1 H# s! p1 P6 i+ p% A3 O
- state.running = true;! ]' T- i* M" S) J. R7 D
- let fps = 24;
) G4 ^! W! S$ s ]8 ~6 z" K - da(g);//绘制底图( u1 V' \# y4 n1 g f/ d
- t.upload();2 H; I2 |" K) _6 V& `7 a+ n
- let k = 0;
( {2 W/ D' D( C7 N5 m; C4 j6 y( W - let ti = Date.now();
. u) o1 ]3 L X. h) k - let rt = 0;
0 m0 F1 \" B$ ^5 j2 l+ W# z7 _+ N - smooth = (k, v) => {// 平滑变化4 A- b: G! | A/ z: ~0 b
- if (v > k) return k;
% K# }/ E0 U" W$ K0 G5 S Z j& S( e& a - if (k < 0) return 0;% w6 K/ ~/ c' t, P
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* N5 Y N7 K5 o% f8 U3 ] - }8 ?, m8 W$ I% H- z/ t! A3 I! ^" f/ T
- run = () => {// 新线程3 r% a0 N7 j5 g. V! J7 D
- let id = Thread.currentThread().getId();2 x! X8 x* |& O1 W; }
- print("Thread start:" + id);
* K q7 F# {& S - while (state.running) {' g! b5 |' ~' r2 E5 n2 U- |
- try {
. d3 F, W; t6 W3 b0 _ - k += (Date.now() - ti) / 1000 * 0.2;
D. w `7 u! p; I& |9 f! t) o3 h4 |& j - ti = Date.now();
& {* s5 A; r& ~4 A4 ]7 B - if (k > 1.5) {+ I0 M- u9 U# m" S6 @5 R
- k = 0;7 ^; G7 r+ Q! I, Y6 Q& d2 Z5 o
- }
) t* J* {8 K3 J. [2 j - setComp(g, 1);
* i$ h( k3 `# b - da(g);7 [; m6 J8 O7 x2 L5 F0 s
- let kk = smooth(1, k);//平滑切换透明度
o* J* |! i' z0 Y7 m - setComp(g, kk);
Q, j5 o2 n. c$ x) `4 V. u: E - db(g);
; d" l1 r! H+ K7 L+ }) R - t.upload();; Y5 z' J2 s& K, d1 v6 D4 E' k
- ctx.setDebugInfo("rt" ,Date.now() - ti);
5 Q2 g5 T2 i$ q( \% b - ctx.setDebugInfo("k", k);
: |5 y5 s$ ~, C5 O( \: C. \( P - ctx.setDebugInfo("sm", kk);
. Z$ X% h( ?$ @# w) z4 p* N - rt = Date.now() - ti;% n5 |, Y+ n v4 e* g
- Thread.sleep(ck(rt - 1000 / fps));
( Y' u. c, j) N' a# ]8 T$ Y! j" y - ctx.setDebugInfo("error", 0)
( v4 o' `; S, L3 h/ _0 `" i - } catch (e) {
9 D/ `5 r+ v! u - ctx.setDebugInfo("error", e);0 ~8 k6 c) a( `9 w
- }, A- `. l& s0 F' T3 t
- }7 F+ A0 |$ Q" `9 B
- print("Thread end:" + id);9 {, X% I0 c9 t, O$ z& U9 V
- }
) n& @, c* C' c9 n - let th = new Thread(run, "qiehuan");8 o8 u9 ]; `" B3 m' K! z4 j
- th.start();: i+ ^2 |; m" _% g" I
- }
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- function render(ctx, state, entity) {
2 C( @( s: J6 r4 ^2 H" j: \ - state.f.tick();' L/ B0 L$ h9 j$ X+ F% d1 }# o
- }$ L1 e1 e. F* Y; F: l8 S! [8 c ]
0 l4 `3 a* Z+ V* N" J' D5 P- function dispose(ctx, state, entity) {4 g' c# U1 W8 P$ C2 J% {3 D
- print("Dispose");9 ]8 P0 z" L4 k1 o
- state.running = false;
|' S8 B- m* `7 b - state.f.close();
X. d6 J3 S& |- Y" m% B# M - }
. ~ z( }. \9 O
" M1 A8 u9 u$ |# c$ ~- function setComp(g, value) {5 w; o$ L5 W( a8 u2 \4 @6 M ?% s
- g.setComposite(AlphaComposite.SrcOver.derive(value));
" }* W7 E" [3 r' B - }
复制代码 $ Q. x" p" \9 _' 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。0 {! I9 Z& S* e! a1 a6 ^
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# P- I0 ^0 d; a1 C. 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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