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f" g* e, N" H; I9 N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。4 Y# D0 p' i( E4 ?
- importPackage (java.lang);3 c4 N# \1 ~8 j; f
- importPackage (java.awt);: ]$ u) }( e" H; {. r
) s. ?5 G! f3 Z/ m& [- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);3 c# R- L! ^2 R' L- G& L
- 7 [; m( D0 _8 O: J1 e9 k% o, u
- function getW(str, font) {
% @; a' u$ F" I/ Z+ T* E& J - let frc = Resources.getFontRenderContext();5 ^# {. Q3 E2 S# x5 a
- bounds = font.getStringBounds(str, frc);
5 L2 M0 Z; V# i - return Math.ceil(bounds.getWidth());
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5 n8 A0 s1 R$ U+ \+ C- da = (g) => {//底图绘制: `5 ^( Q4 h2 i" r* T
- g.setColor(Color.BLACK);
# \, ?6 a- ]* b; M, k; [4 E - g.fillRect(0, 0, 400, 400);) X/ O$ W) ^9 v( y
- }1 I" Z" W6 Q. d) G$ p; F9 W( m# \
4 h% |" X9 ~" Y0 r; [8 a& R$ u- S- db = (g) => {//上层绘制) n0 ~$ }5 F, h2 B) h' }
- g.setColor(Color.WHITE);3 Z$ F& E; U/ d M
- g.fillRect(0, 0, 400, 400);
* R) B& d3 S- v2 Z - g.setColor(Color.RED);5 ~: }0 Z. _5 d: I9 T/ q
- g.setFont(font0);
( W0 ^2 D0 y! c& k - let str = "晴纱是男娘";$ W4 p* c0 h' N' m: C
- let ww = 400;
2 o+ i) p' r( \: w" o/ s - let w = getW(str, font0);
$ `7 M$ D% Y5 R5 Q# P - g.drawString(str, ww / 2 - w / 2, 200);
8 {% z: a9 ?4 E5 C - }
1 c$ K s6 }" E. H- W+ s: H3 @ - / [; N! X# n' n! K4 x
- const mat = new Matrices();
; o2 }5 M- z8 R' N# y4 \- o - mat.translate(0, 0.5, 0);
8 A) W A% w- U, x
2 a5 D9 F6 Z1 `4 l |+ }- function create(ctx, state, entity) {
) Q/ X) c4 ]) k1 z0 N8 G0 _) I# i, @4 L - let info = {
9 A) O* Z7 s, e# m - ctx: ctx,1 E0 X+ y3 V( V/ V, Z+ V
- isTrain: false,& k+ v% U) P/ J4 G
- matrices: [mat], N- W: |; e; R$ N
- texture: [400, 400],
! d) o6 C M6 u - model: {
' Y l+ {' M+ i9 H1 ? - renderType: "light",
7 h7 r/ S$ ^, `* \8 A; }% W7 a - size: [1, 1], S5 E+ X6 i$ g
- uvSize: [1, 1]
/ x, U' X. U/ x# Z - }
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- let f = new Face(info);
3 E6 @ T2 y' N- `2 }1 T) y2 T - state.f = f;
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- let t = f.texture; Z1 @4 e7 o1 u" Y0 R- V
- let g = t.graphics;
7 z8 G g2 E9 q5 t - state.running = true;8 m! R M$ j& a+ a
- let fps = 24;/ Z$ @# f, h, H
- da(g);//绘制底图8 ?& U8 g5 D9 V& O3 `
- t.upload();4 L w1 I7 O8 Z& w$ N8 x* ^2 E }
- let k = 0;$ d% i7 }7 _+ X0 u* u7 [2 @
- let ti = Date.now();
) x% [/ h" s. J. D, I1 q - let rt = 0;
# w8 }9 X; H0 f - smooth = (k, v) => {// 平滑变化
! V/ }' G% _ X4 B# h( C - if (v > k) return k;$ `4 w# E7 [! U2 Q8 c8 q
- if (k < 0) return 0;4 |6 C& d3 i$ k# {' W
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! n# ?# Y& k+ q/ y" T$ n4 [/ r - }
7 J8 d: a3 j" X - run = () => {// 新线程 I( f6 ]) a( h( c' m: t
- let id = Thread.currentThread().getId();
( k1 }6 S, s- \# ]. i! [ - print("Thread start:" + id);
0 ~ ?& F0 X0 S5 \ - while (state.running) {
& d( P- x @) X. q) d8 p O* g - try {
3 d! K! ~3 O! {+ L - k += (Date.now() - ti) / 1000 * 0.2;
2 [- z+ l' a- A5 a# K+ T; _ - ti = Date.now();4 [8 V5 i! d' d1 W: W. d
- if (k > 1.5) { [% Z1 x, W& H; [+ O+ ]% @
- k = 0;- u; k$ L' L/ h: h$ F1 o" ?
- }& r6 v4 V" t* N1 r
- setComp(g, 1);- r& X: C" Q% T7 p9 d$ J3 D
- da(g);
" c* T& D+ Q( \3 z; j - let kk = smooth(1, k);//平滑切换透明度
, U. a* ` e3 [) j% v! f# U% x1 O - setComp(g, kk);
) V! `( o! r: s) q- y o. f1 T+ O - db(g);
! m- l3 n2 I+ S; D, v% ] - t.upload();
; D- @/ Y- L/ ^8 S0 K9 ^5 p; [) p- C - ctx.setDebugInfo("rt" ,Date.now() - ti);1 }9 X4 z% W8 l$ Q. M+ g: K/ \+ M0 h
- ctx.setDebugInfo("k", k);3 W* v. g4 @5 I
- ctx.setDebugInfo("sm", kk);- }* t2 I% T* j* @1 i; H2 D
- rt = Date.now() - ti;
: T/ ]6 _& m, q) t, H4 E, _; n - Thread.sleep(ck(rt - 1000 / fps));" @ _0 R" S$ @0 Z+ a/ ~
- ctx.setDebugInfo("error", 0)3 L& ~0 x6 a! J4 y3 @" u
- } catch (e) {
9 V& P' |( ?0 z; Z" C - ctx.setDebugInfo("error", e);
+ J, `% q( Y/ y9 V- m2 k- `) L7 n$ m - }. s' Y6 x. I1 M# w/ {
- }
: ^9 S' Y+ R5 Z& K - print("Thread end:" + id);
7 s3 l3 }* A* A: x* X) A$ N - }: o2 g6 d1 U, D0 A$ E C5 z2 ~
- let th = new Thread(run, "qiehuan");+ q4 x; z8 E- i& R* |
- th.start();
! p& F% n3 L3 x- _ - }# j6 K5 z: F/ L; x @
$ K# K4 K$ l5 T6 `) B4 Z9 `- function render(ctx, state, entity) {
5 Y1 e* w5 n, t& [' H5 S - state.f.tick();
& _: R& V6 h; u2 M - }
4 p1 l9 l/ b4 Q2 S: @" _1 V' G4 d$ X
# b* h% ]8 A8 o: Q Q$ C R- function dispose(ctx, state, entity) {- D# D2 {, b2 b: ^
- print("Dispose");) t3 t% C8 {* L2 m) B
- state.running = false;- n+ S, O' C! @
- state.f.close();
; U" u8 Z: |% m0 G3 @ - }
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- function setComp(g, value) {3 X9 @5 W! ]8 m; R$ b1 A8 u+ G' E$ W. o+ O
- g.setComposite(AlphaComposite.SrcOver.derive(value));
1 b, O( _% l' K2 s' P+ z- _ - }
复制代码
. y+ j9 ~, z& u8 h) O, C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。1 U+ W' b @1 L$ x# E* E3 |& O
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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)! z. E5 |8 q6 k Z, U# a6 g
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