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$ k( Y& W1 o. T& J3 F# e) r$ E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。
: d X, c% f2 m: U- importPackage (java.lang);
6 D6 |& d- g4 n( Q, Y - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);7 }( @4 V9 _8 [5 G4 z) b
7 }5 I- f- V, c3 g# K# E! {- function getW(str, font) {- C+ G. I h" {$ x
- let frc = Resources.getFontRenderContext();# G) V2 U; A h0 ]3 }
- bounds = font.getStringBounds(str, frc);
. h4 F+ `& Z$ P! U6 [; x$ C, `5 U f - return Math.ceil(bounds.getWidth());
% M) G# [" b' K8 D. U( d - }
) |1 H' a. R9 @& D
3 f% I$ ~( {4 k4 _1 ^/ O! Q- da = (g) => {//底图绘制# V" k5 n( o; x
- g.setColor(Color.BLACK);5 n* [% B. }0 V/ h. H) Y, \2 F- I
- g.fillRect(0, 0, 400, 400);2 L2 G: l, k6 r
- }
% C K9 r3 [4 T, P9 I1 r - 9 P/ e5 l# `$ _% ]: z. Z6 i; p( O
- db = (g) => {//上层绘制( I9 | Q+ n, p
- g.setColor(Color.WHITE);$ n0 d2 q8 C- }* y8 f8 z
- g.fillRect(0, 0, 400, 400);
h/ {6 }# L" N0 B2 ^) h3 C - g.setColor(Color.RED);8 _6 Y, ?) l" y& `. C; C
- g.setFont(font0);6 G6 g; @7 P# [) Y
- let str = "晴纱是男娘";( w3 G+ a5 |' u/ Y# A( j/ L
- let ww = 400;
5 M" l2 C7 c) P. p: F - let w = getW(str, font0);: `! s5 n7 Z6 V: y- B
- g.drawString(str, ww / 2 - w / 2, 200);# e1 R& u) H! \1 v E9 p+ t# H
- }; d% A5 V2 K1 q
+ S) ?" f5 M% r- const mat = new Matrices();
3 I0 d& x# L# ?+ O# y - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {1 \; }( u6 _) |1 i8 q
- let info = {
1 ~$ t8 w! h2 [6 P1 x - ctx: ctx,/ ]6 s, t: t5 u. `
- isTrain: false,
) ]! S: S4 U- j A) B - matrices: [mat],1 u% m# U% Y& Y& E9 |+ c2 r; i
- texture: [400, 400],) b3 f: |& I% m1 S$ d3 P- w+ m
- model: {4 u, c% T9 n k$ Y" e7 H- C* c
- renderType: "light",' w/ |3 t% `0 d9 i( E; `& b" X# ^; ]
- size: [1, 1],+ }3 {& D$ U) Q5 y! k" u8 |
- uvSize: [1, 1]
( H1 p& O1 F: [# z - }
" a8 j5 U: C, A+ Q7 M - }
) g! `4 E/ @* W6 I5 X9 d" B - let f = new Face(info);
; L+ v4 H( D! k' H- f - state.f = f;
1 H/ N1 C0 a" i
6 x) E7 B# b+ S. }- r0 p- let t = f.texture;4 Y' @. b1 Z$ z
- let g = t.graphics;
; h, x3 M! x0 h6 g- `9 T0 Y - state.running = true;
7 A& Q4 P# l' g, I - let fps = 24;% i; t s* s+ Y$ J% q3 l
- da(g);//绘制底图
4 L$ w. ` Z5 X" c, H* O - t.upload();, L/ E9 W5 J" p: i$ ?# M" ~
- let k = 0;9 G! a6 P$ R" v, @1 c! n Y
- let ti = Date.now();
8 I' j3 D* N y - let rt = 0;' b/ D: ^# m* t" F5 m
- smooth = (k, v) => {// 平滑变化: i8 \' T" e% V- Z: U& D, g" [
- if (v > k) return k;
7 v9 T8 l! E7 S% }0 u5 w' q' z* k - if (k < 0) return 0;
/ D) `5 X9 e8 G - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; N7 @7 W# F8 l/ |2 t. N
- }4 \# ^; r4 `3 N ]& A) c& P
- run = () => {// 新线程
; j+ l. B* k+ t+ J - let id = Thread.currentThread().getId();
2 Z. U8 P5 n. k) n3 P1 S - print("Thread start:" + id);+ D- X6 l6 q+ ~) g
- while (state.running) {
; G3 V* y1 A9 x& d- y5 y/ b! X - try {
6 A, i( `. p, V2 t - k += (Date.now() - ti) / 1000 * 0.2;
. x( n3 n2 b2 G% K( ?% { - ti = Date.now();
: V- c, c6 O _5 H3 g( W1 h; ^ - if (k > 1.5) {
+ y2 w$ ?$ c3 e3 m. h - k = 0;
7 R5 \+ {: A, h- ]% n! x - }
9 `5 t/ U9 N3 X1 y9 x - setComp(g, 1);
) _5 |1 E. i0 M$ i0 t) Z( m - da(g);0 C j6 a2 e* @7 \+ w+ \; g1 f2 G
- let kk = smooth(1, k);//平滑切换透明度( j' n1 {& r! O. _5 R2 c
- setComp(g, kk);
6 R7 @# B! ?0 M: B9 O! I% A - db(g);
* p" S0 U9 D9 P+ z: W. ?& m6 \ - t.upload();7 L3 t* y! ?4 p4 W
- ctx.setDebugInfo("rt" ,Date.now() - ti);
; }3 y% B5 O N3 g$ f/ U3 }; V - ctx.setDebugInfo("k", k);
: H8 W. h) o& x* I - ctx.setDebugInfo("sm", kk);
5 V/ A2 X1 d% r; m! _, q; ?: J - rt = Date.now() - ti;8 t M. o5 e# L6 P
- Thread.sleep(ck(rt - 1000 / fps));$ T# B+ |: i0 g8 x: n
- ctx.setDebugInfo("error", 0)/ w ]- e- n0 T( Y4 f; Y' J8 H6 Z# J
- } catch (e) {- C' I/ b0 a& ^1 d# ^0 G6 N
- ctx.setDebugInfo("error", e); C5 h9 o& E+ V! V( d
- }( ?/ u+ L7 X% y+ d6 _
- }
8 N% w$ W$ I* |+ X( ~) o! u - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
0 w* \* T* l% o- W7 }2 b1 T - th.start();! S, n2 P0 L p( R8 w& n$ S
- }
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y; B/ U0 W& g' y9 Q# }- function render(ctx, state, entity) {' x1 d: R- F' t
- state.f.tick();
% @- u& v, J0 F: A& E8 p - }
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- function dispose(ctx, state, entity) {' \- `0 [& U0 a7 ^6 T G0 _9 ?
- print("Dispose");
3 ]& u& W4 ~' H# b# R - state.running = false;0 ?4 g' c q# w% h, S
- state.f.close();5 t, B/ I" {: U/ z# L
- }% W0 \6 V, A/ f# i: k3 v! a+ f
- , {- k w ?+ l! E) K
- function setComp(g, value) {0 M, d" L5 j I5 E. T
- g.setComposite(AlphaComposite.SrcOver.derive(value));* ?' p3 U4 h$ ^5 g5 r/ t
- }
复制代码 3 b m3 g% l- E5 o# 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。$ j6 q* R2 i1 C
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& _% R" k/ {" T+ ?9 V8 D# y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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