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' g, J, c5 ?" {6 k" }( D7 \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。
5 T1 f/ Z% l8 e/ }0 s: A% C4 R7 Q- importPackage (java.lang);
k0 y2 `8 c* C - importPackage (java.awt);
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$ f, R% @2 y9 g; x0 ^- include(Resources.id("mtrsteamloco:library/code/face.js"));
, ?$ v5 E# M4 J2 E) B7 h - " V5 r# n8 \! J7 i& d$ V# Q3 V$ D
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);8 D0 G/ u* j$ J" X: k c" V
7 g$ N8 W, R0 I8 d- function getW(str, font) {
9 M" Y. u. a, _6 s( q - let frc = Resources.getFontRenderContext();8 n0 z" B- ^7 F+ i3 ~7 U1 q
- bounds = font.getStringBounds(str, frc);
1 U+ g$ R' U0 G# b; @ ? - return Math.ceil(bounds.getWidth());
5 r. }# R9 N+ K! ~ - }
5 n t: i4 s/ ?+ W# A - ' }& D( n) }6 Y$ o: u& I( g9 q
- da = (g) => {//底图绘制
+ ]) e" w1 ~# \ - g.setColor(Color.BLACK); u c5 S5 \2 w
- g.fillRect(0, 0, 400, 400);
6 B/ @1 W9 M8 M: ` - }' j8 ?- N2 v7 ]
, v5 b5 E _' D* `- db = (g) => {//上层绘制
* K- i: b# a; Y7 F* I; P: u - g.setColor(Color.WHITE);
% i" Z0 f8 F" \4 q2 p" R. h' r- O - g.fillRect(0, 0, 400, 400);
! K" B9 E( U8 m* |, g2 b! | - g.setColor(Color.RED);
2 h! P2 S# g* U' b4 H& p& N" Y - g.setFont(font0);
1 _* s! P6 q+ W, V- i _ - let str = "晴纱是男娘";
$ i. f* l" r8 ]! h9 @8 R9 F! S - let ww = 400;
/ ]; j t1 }7 m+ q# i( R2 A - let w = getW(str, font0);2 K- {. @7 ^2 b, [# I- `; V* m
- g.drawString(str, ww / 2 - w / 2, 200);+ N) a* M; n* d' e9 F
- }5 @; v" D( G3 ?8 M+ V
7 a- a8 F! \9 x5 R- const mat = new Matrices();
5 c9 M$ p# o v: H/ y - mat.translate(0, 0.5, 0);3 W- h3 d$ q" x# k! Q+ ?
- : y9 W, O$ r0 |- E( V
- function create(ctx, state, entity) {
1 K# @: E7 X8 Y( h' a - let info = {0 G% b' q) @ c, P3 ]
- ctx: ctx,
+ N" N& |# w7 w' v) L n8 E4 Z - isTrain: false,; H& c6 s/ h( n9 z" Q6 U
- matrices: [mat],; i, s9 W( u, g5 ]- h5 H
- texture: [400, 400],
& I8 c& j. b ?& j- F - model: {+ H) w( X( d0 J9 Q! n% B
- renderType: "light",
/ }$ Q! \) @. k" I2 \ - size: [1, 1],
1 D# ~2 R3 x _% J# ] - uvSize: [1, 1]9 F- @8 R1 K% g& B5 L0 L- }
- }
/ J, H+ M6 u: H) a+ J- o - }
6 B" x: R' J H2 D- {% `6 p - let f = new Face(info);
! F" Y+ W2 k( m0 j% V/ l* b - state.f = f;" q# @9 W& J6 p. |- x" v2 A1 ^
- / }0 \+ T- e) G/ F3 y" o
- let t = f.texture;
+ Y w* Y g5 f: ?& W - let g = t.graphics;) n: q+ \, M/ b* N* o% {# n* p
- state.running = true;
+ M& _1 @1 C& R8 P - let fps = 24;
% ]- W8 H$ T2 F: z! G; L: D: p: ~8 X - da(g);//绘制底图& z! V9 t' p/ r& g- q/ B, _
- t.upload();
% u w0 h! [: X2 M - let k = 0;5 }6 f% u) g* e1 l# `6 h
- let ti = Date.now();' L& v% m: k% \2 L# |; J( E
- let rt = 0;
: I( l2 U2 q) H! d5 A - smooth = (k, v) => {// 平滑变化9 y/ c$ w; L0 x4 ~$ H5 D
- if (v > k) return k;0 I0 Q! G+ D) q
- if (k < 0) return 0;
) |; ]" J# M, l4 X, G! f - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;" s, E' D; F4 n: N. @
- }
. t( V' f7 z' m. V d1 [1 b) s - run = () => {// 新线程
/ ?2 b& J. I4 J - let id = Thread.currentThread().getId();
7 n* n) G+ I! l# q0 }" i - print("Thread start:" + id);
& p" g( a5 A' u# _3 u1 [/ M# P - while (state.running) {
V: L7 r' c0 f. \# o1 P1 Q - try {
% g! @- _$ B1 c0 E, p6 ^! ? - k += (Date.now() - ti) / 1000 * 0.2;7 q$ r4 G9 g! S8 G8 N" w
- ti = Date.now();
9 O4 M5 z% E* H+ L' W% u0 t4 J$ T - if (k > 1.5) {. A. ?# v8 O3 u
- k = 0;3 r q& q: e+ W/ [. `1 V$ F* |4 _
- }# j0 d2 E& J/ `
- setComp(g, 1);
, Z1 j% F% r2 ^5 r3 n - da(g);) K* b% I# S$ j. d. Y
- let kk = smooth(1, k);//平滑切换透明度) H9 w; \* `4 n" T! u, G) f% |& d
- setComp(g, kk);' l- X% y& N1 f* z9 j
- db(g);
) S5 N# H0 X, h3 W1 n! f8 I - t.upload();+ {" g! b: m3 e8 t) ]! w
- ctx.setDebugInfo("rt" ,Date.now() - ti);
: _, x" o& w) N' z - ctx.setDebugInfo("k", k);! t3 B' O: R# C
- ctx.setDebugInfo("sm", kk);
- ?, n# S0 P% }' y - rt = Date.now() - ti;
: u( \ k( ?! @* o$ {% s- j - Thread.sleep(ck(rt - 1000 / fps));, C/ j, R$ M& V( Q. g
- ctx.setDebugInfo("error", 0)
& b0 M, g) c7 y2 y3 p1 n# q/ a - } catch (e) {
) R* _5 A" ^0 N( \ - ctx.setDebugInfo("error", e);3 P. S) E- u6 w8 s* v
- }" c C1 D; ~7 o9 C- o2 F9 K2 X
- }( x5 S2 [' @( C
- print("Thread end:" + id);
+ T* b- N) I9 V+ G9 r2 j1 r2 `8 R* ? - }
* E7 V4 r" @( }5 A. J - let th = new Thread(run, "qiehuan");
3 [: }8 `. A4 [ - th.start();
/ T! m1 o# N1 E - }
& w. F, f/ [! p' e) @
( G( T5 _: v+ y- function render(ctx, state, entity) {5 R& q( D0 [ T, R: D9 M J* f& j
- state.f.tick();4 h, U. N! W5 I
- }
3 L) |1 }/ y+ F6 ]4 d2 N* l, C - : b# e" n! a% g- U8 S
- function dispose(ctx, state, entity) {
/ ]* ^) m1 Y( e+ C1 C$ a" V - print("Dispose");# Q6 y7 J1 ?* }: D
- state.running = false;8 b8 U, E- N; ~- f; Y1 B
- state.f.close();, w+ F+ ]8 |) P/ u9 A3 d) V
- }0 c. ~4 M( t$ l4 p& Q% d
. l' d+ ]9 m# y8 u( s! M* M O! N- function setComp(g, value) {
, A7 W; ?5 p7 L/ ^8 `: c - g.setComposite(AlphaComposite.SrcOver.derive(value));
3 a& ` G& B1 q* w* n; O6 i6 z( V - }
复制代码 8 M" h0 p. W6 J% D; f
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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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)) r! \7 t- n9 [' o, a
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