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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。) S. o; u! m9 O1 O
- importPackage (java.lang);
1 T( L& _0 \. K, h L - importPackage (java.awt);/ ], j w% i' Y# g8 P( }5 v
# S1 |4 J. Q. L$ z. M5 [- z- include(Resources.id("mtrsteamloco:library/code/face.js"));
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1 t' v! a, w$ f& M; N6 \9 L- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {, h% f! i$ h; f8 B/ J+ B. k6 N
- let frc = Resources.getFontRenderContext();
5 a P1 r8 f; n5 ?* B6 w9 H - bounds = font.getStringBounds(str, frc);# P- }$ T; _% ~ e) ^) ^' p2 r. M
- return Math.ceil(bounds.getWidth());3 q* O& G# U1 m! I* j' Z! l
- }
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- da = (g) => {//底图绘制
' F1 _- F7 x5 M$ S- ]. f3 _ - g.setColor(Color.BLACK);* f# @2 b: X {! Z
- g.fillRect(0, 0, 400, 400);
' @2 T! j6 y9 ~1 R0 [! w - }
$ R" G, X1 `/ H- P5 g
/ E, z* t$ ?7 D; G( d8 R; l/ s! \- db = (g) => {//上层绘制
. I3 q9 S" o1 v. ^ - g.setColor(Color.WHITE);
+ g1 r( q. E k+ z - g.fillRect(0, 0, 400, 400);( l4 M. L% y) X% k
- g.setColor(Color.RED);
. z; I! [- L1 M- m1 l - g.setFont(font0);6 @/ ~ T7 R6 _6 E# E& T% E+ R
- let str = "晴纱是男娘";
! B H7 O' K2 ?/ ?+ } N) C - let ww = 400;
5 _# r3 [8 R, O0 D9 p9 a# r$ L - let w = getW(str, font0);
( w6 b4 n7 H* U! { - g.drawString(str, ww / 2 - w / 2, 200);
2 l- n7 O" U. c1 ~ - }
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- const mat = new Matrices();5 J) f. @1 z7 J! i+ u
- mat.translate(0, 0.5, 0);* T R3 M! X$ S
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- function create(ctx, state, entity) {/ N8 z: v4 }2 P/ P, ]
- let info = {0 F3 T+ D9 {% K ?# b
- ctx: ctx,+ z* V7 O* @% g7 k) ^- b
- isTrain: false,
9 U" D, i" {+ [ - matrices: [mat],& q# P4 H* w* J* j% c4 ?
- texture: [400, 400],
! C" b# k2 T/ V) C- R% B' P - model: {
" M8 ?) m" a* s9 }7 d& Y - renderType: "light",
( _; F& |5 G7 t' @- p0 O - size: [1, 1],- b+ M3 _0 O4 G1 g+ l/ Y
- uvSize: [1, 1]8 j- H) u# [3 q
- }0 i2 r o; V# `5 _$ \8 {0 C% C; b
- }
% c7 @8 T1 x- [; a2 E - let f = new Face(info);
, j+ W8 v2 i& j5 J: `0 U. k - state.f = f;
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' g+ b' v( F" @! R: u7 ?/ C- let t = f.texture; p. U0 [! o: m1 P1 q
- let g = t.graphics;1 {0 a8 ?& r0 _
- state.running = true;
5 X' f& n( M* u1 U - let fps = 24;1 k+ _/ g/ k$ G& \+ q
- da(g);//绘制底图
7 }$ {$ O4 B8 ?" x" ^6 k, W - t.upload();
( t0 r9 I/ ?0 X2 M - let k = 0;2 [% t \" `0 U
- let ti = Date.now();
$ k# _" l, I/ o9 C! u6 | - let rt = 0;
1 y: |5 I, \: p' C" t5 w - smooth = (k, v) => {// 平滑变化2 j; g6 t6 ^( r" s
- if (v > k) return k;
/ _# v& E( h+ t1 ~9 Q- [ - if (k < 0) return 0;5 y: H5 j! J) R, j$ C
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;; n; R3 g1 M; r4 q% Y
- }* g2 \, T& m! @4 E/ p
- run = () => {// 新线程
6 g2 K" r* w0 }) g( J9 L - let id = Thread.currentThread().getId();
/ R2 b& w* ]$ \ - print("Thread start:" + id);
3 ^& o+ ^5 j4 {) U1 ~+ z - while (state.running) {
5 N. L2 s7 ]9 P* T# h - try {
* q& d" U0 C; Q- |; T3 v1 { - k += (Date.now() - ti) / 1000 * 0.2;
' m% X+ f- S8 {- j) R5 a; J - ti = Date.now();- O/ G$ V" N' ~
- if (k > 1.5) {$ ~! ]9 P) P5 _/ m5 M" [0 ?( f: L
- k = 0;1 n* V* e1 c: R" D b; p
- }
( {7 p) y, k6 U6 ~+ v# C* m9 ` - setComp(g, 1);
$ \9 H1 W& z: u# f) @) u - da(g);
8 l- N; [& w. }2 \, x% n E - let kk = smooth(1, k);//平滑切换透明度
8 r3 ]' A% x9 L) z - setComp(g, kk);
. ~& M" z/ [( Z4 W2 R& @6 h6 _ - db(g);
6 p1 H( B+ J9 Q. x3 S$ |% s - t.upload();, e5 p' n& N6 Z5 U& G# l
- ctx.setDebugInfo("rt" ,Date.now() - ti);
( M+ e/ d. v _, ? - ctx.setDebugInfo("k", k);
+ i$ ?1 ^. M1 N1 l6 u - ctx.setDebugInfo("sm", kk);
& i) [3 H; c& h - rt = Date.now() - ti;
! }5 T& g" Z% u9 V/ x. d3 s - Thread.sleep(ck(rt - 1000 / fps));5 ?2 ]3 r# v x8 V' L# \* _
- ctx.setDebugInfo("error", 0)
% w% w9 }8 _8 s9 ~0 d - } catch (e) {
8 B' P0 e) d0 S' W2 X0 l* F/ N - ctx.setDebugInfo("error", e);0 K t$ Y4 {/ a+ |
- }8 j4 A$ t* ^- ^
- }
/ } W7 m# r. D. Y - print("Thread end:" + id);4 T' B9 k2 s( @
- }/ k1 d' a/ H* j, a
- let th = new Thread(run, "qiehuan");& j! b" {0 u% V# S# |% l
- th.start();
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- 3 H H- E9 K6 e' }: m1 m
- function render(ctx, state, entity) {/ _, C7 E7 j& Y! O' B% n1 [3 y
- state.f.tick();
- o6 r5 }/ I N; ~% h; l4 o% _ - }
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: j+ g" ^0 C$ F+ ~0 J- function dispose(ctx, state, entity) {; S5 H! p% G+ [& D
- print("Dispose");
7 i: P. K2 Z& \& T9 B, S' B - state.running = false;( n' F) d. U B1 _+ a8 S
- state.f.close();
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- & b* p% T/ |# [, A4 \6 [, t
- function setComp(g, value) {/ _5 g- E5 Z2 o6 u. p7 z* y
- g.setComposite(AlphaComposite.SrcOver.derive(value));4 ?# ^: y4 U# z; | u6 d
- }
复制代码 ; G, Z7 o, _ T2 `$ z+ q3 _
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)
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