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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。
4 u2 D# y5 k& u2 p; x- importPackage (java.lang);' B+ p7 \0 U( s, N1 V; i" W4 U
- importPackage (java.awt);# }; q& H2 ]5 ?* I
2 ]. v4 j4 K2 `* K+ c- V- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80); t( l. N8 k2 Y$ \8 d; A" X1 [* W
+ `7 [7 M5 D8 e f$ s5 W, a7 j- function getW(str, font) {2 {9 E% ^ g% e2 i
- let frc = Resources.getFontRenderContext();
! k9 r9 O3 W6 J$ p3 i4 Y - bounds = font.getStringBounds(str, frc); K& E+ T8 x& M' |7 M9 J% b0 A: c
- return Math.ceil(bounds.getWidth());
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- " t2 \( M5 j/ N1 i& I R. j
- da = (g) => {//底图绘制
$ o7 m% h) m0 }9 i8 K% G; h - g.setColor(Color.BLACK);
; H) g* N1 k( E5 M - g.fillRect(0, 0, 400, 400);0 @% J1 V9 ?: U' S4 U4 J1 x* M
- }" Q( ^7 E+ e* V- V* q7 M
. C0 e% m: B- z9 s- db = (g) => {//上层绘制
; m5 _; U! |3 T: M8 m6 \ - g.setColor(Color.WHITE);
1 X, d$ i5 V8 W1 [, _* C% F, i. X - g.fillRect(0, 0, 400, 400);# J) G( V: @; h- U6 M: C
- g.setColor(Color.RED);
# D; s7 _) c7 m% a. Z& D - g.setFont(font0);
7 m1 o/ C# d1 y, o - let str = "晴纱是男娘";1 h& ?# a) ^) u& M& M4 F% C
- let ww = 400;) I" M/ C7 U( Z) F$ e; T; J
- let w = getW(str, font0);
' s8 p9 w! J3 {# ^% y5 m8 K - g.drawString(str, ww / 2 - w / 2, 200);2 z. E; Q6 ]- P z
- }
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* S6 H/ d- ^1 S0 J4 I* N- V* ?- const mat = new Matrices();/ A" g' F, _+ {1 |$ E: r) K
- mat.translate(0, 0.5, 0);8 k: K) p" Z5 ^/ S6 p
& ~! T) i2 o0 u; P0 `4 r4 }- function create(ctx, state, entity) {- P4 [$ [, m1 x2 N5 E" [$ M
- let info = {
T/ M. g6 i) M3 w, e - ctx: ctx,( |* a/ }5 ?( [+ c" n6 A! k
- isTrain: false,; O8 I' ~1 d7 e+ @
- matrices: [mat],
8 f$ T8 e2 E# m+ K* l" y - texture: [400, 400],; Z% `+ z' l3 H& Q9 s8 ]3 [- O" n% k
- model: {& f, p) ~4 t: e
- renderType: "light",
5 @. d: ~% ?- r2 v' r) ? - size: [1, 1],/ q0 ]1 [) [/ W
- uvSize: [1, 1]
; G9 D0 L, {- E, s* K& } - }
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- let f = new Face(info);% [7 `2 V: }: e' |: j Q
- state.f = f;$ F$ V0 z P* n {
+ V( {. h+ H9 c6 N1 x- let t = f.texture;& d* Y: P& D# A. H
- let g = t.graphics;, j0 B( [, G' d- C/ y1 A) q" I
- state.running = true;
, N2 y& u: _' d6 w - let fps = 24;6 z1 s3 z0 e* S7 ~& V
- da(g);//绘制底图; |4 w( N; z% u a* l
- t.upload();
2 b, S3 \1 |" j! X - let k = 0;
% S! v/ P' `5 V+ n - let ti = Date.now();
. u Q" B5 C/ [3 {3 _1 |% ] - let rt = 0;
: s$ e% z1 `; `7 _* E; Z; E - smooth = (k, v) => {// 平滑变化# z: l/ L* T5 e7 n& J6 B# u- l
- if (v > k) return k;& M! e k) _6 \; N1 v9 W
- if (k < 0) return 0;
* p r1 r" {1 @' O! c) g - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) f' {/ d' I; E# |' ?5 q
- }
; [% |# _5 I1 c$ s - run = () => {// 新线程8 s2 K8 v1 R! E3 [
- let id = Thread.currentThread().getId();8 |* O% k! R5 w8 P/ E' C! X
- print("Thread start:" + id);! e) f+ F3 O+ |9 j2 u, e
- while (state.running) {
- ]) X8 h: N4 E- Z- m5 I - try {0 w6 O4 d) W* C& Y9 d* ~5 p
- k += (Date.now() - ti) / 1000 * 0.2;
: {* j! G9 u0 h! k - ti = Date.now();
8 v4 C6 S$ `7 L - if (k > 1.5) {
?! v. Z( H. Z - k = 0;; u1 V/ Z, M) e
- }! D! t8 X( ]& a6 P2 \
- setComp(g, 1);
# m* O! x4 ^7 o" h - da(g);0 p3 k/ {) a6 k4 o
- let kk = smooth(1, k);//平滑切换透明度+ @% n! j1 O) |! a
- setComp(g, kk);
- ~0 J) T+ U8 ^ - db(g); C1 i. k, _* s1 s; g0 `$ H
- t.upload();' w5 C, V% N" \
- ctx.setDebugInfo("rt" ,Date.now() - ti);
& k8 ?3 B G& o - ctx.setDebugInfo("k", k);
4 P: B6 k) u7 X h9 S) } - ctx.setDebugInfo("sm", kk);
) i2 Y, Z: T4 Z3 R: }4 L5 w - rt = Date.now() - ti;
! d6 Y7 x4 J8 x: O8 f f5 S8 q - Thread.sleep(ck(rt - 1000 / fps));4 {' Z" r" B! R# u: L+ \
- ctx.setDebugInfo("error", 0)3 A3 ^# r/ _1 ]' a& D2 C: j# y
- } catch (e) {
7 O0 @) _- v/ P0 l" z - ctx.setDebugInfo("error", e);
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- }
7 a: R( W6 q! m1 [4 D0 { - print("Thread end:" + id);% L% R9 y; p5 w% i
- }
3 D. }, B6 \+ U. O# s+ h, d* Z - let th = new Thread(run, "qiehuan");
$ N+ J1 G+ G% f4 s; [/ j - th.start();& { t U" {1 x. y; V" G
- }
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- function render(ctx, state, entity) {
/ k5 z; H. b3 |1 }1 t: h" g$ e: J - state.f.tick();: \. K& y4 B3 ?! t8 g; C- C' g
- }, C- g$ X/ K& B& ?7 @$ g
- . V: `, z& W- V2 N' b+ x8 Y
- function dispose(ctx, state, entity) {
# J# _$ _$ |- u7 f7 y/ [ - print("Dispose");
$ d9 p$ h3 o9 `/ c, p) n3 ? - state.running = false;4 D& m. l0 q' u- Y3 ~
- state.f.close();
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. h c9 J6 {2 y* }3 q/ n5 |' p) `- function setComp(g, value) {3 M+ n, a& K. z7 C2 ~- [, z7 \
- g.setComposite(AlphaComposite.SrcOver.derive(value));2 v+ o W; _$ j* Y: h8 V% o
- }
复制代码 ; c% @! Q* l) Y# B1 N, `- P- i" j
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。
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0 W, Y! ^9 m6 b7 N5 N. `2 O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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