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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。+ h; G0 A3 f! F2 F" H
- importPackage (java.lang);
1 p% c# Y- ]4 r9 K - importPackage (java.awt);
# R+ i! L# T+ T. I2 b
) |: {( x& Y: P' A9 V- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {6 B l w0 j2 U( |3 J
- let frc = Resources.getFontRenderContext();
* j& w, a K8 c+ J" r - bounds = font.getStringBounds(str, frc);
+ p% C! C7 b* ^% T4 u& I5 [ - return Math.ceil(bounds.getWidth());$ C& X% O1 c3 M+ Q. w' v2 ]9 B3 Y
- }
0 L1 [0 p' T$ D8 R. [, z0 T - 0 ?. o: K, d, S( p) s m
- da = (g) => {//底图绘制
0 f1 J0 n6 G2 {# u1 Q4 R - g.setColor(Color.BLACK);! {8 y/ U+ Q5 |* E! N/ z, T
- g.fillRect(0, 0, 400, 400);) U9 u2 v2 K8 U; X6 }) k
- }# C2 Y! t. ?/ l) [% G; w
1 W- j* u/ u* d5 p* H" P2 k- db = (g) => {//上层绘制
d9 [4 C6 _% Q0 ~' i" l8 ~ - g.setColor(Color.WHITE);
1 w) Q1 m0 t' `* P8 a+ b2 R9 T - g.fillRect(0, 0, 400, 400);: V8 P# w9 V9 Q) o
- g.setColor(Color.RED);" [! ^ C7 s& ^, k
- g.setFont(font0);
/ [7 ]4 j7 v# i0 \' m0 ?0 U - let str = "晴纱是男娘";
9 o& M: w" U5 L' y _ - let ww = 400;
8 m1 T/ L! ~% F& } - let w = getW(str, font0);9 t1 _, }7 j# b3 I Q/ E
- g.drawString(str, ww / 2 - w / 2, 200);) e7 _ e9 P! s$ w( P
- }
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& s6 o6 q9 H5 h4 z( q0 l- const mat = new Matrices();6 D9 Q* A8 {; N1 E- l# _
- mat.translate(0, 0.5, 0);) e5 r ?: T' {. g0 Q, H) l
, J, p5 b% S8 s6 ^' I0 u. z6 ^- function create(ctx, state, entity) {
$ C# C* L+ r% n( S - let info = {4 [& |5 y s; V* i0 o- U
- ctx: ctx,- e# m; m; |- ]5 V
- isTrain: false,4 B: r- I, l' I' G! k3 x
- matrices: [mat],3 y" i' B+ y$ L# e- u$ s& T+ ~& c: M
- texture: [400, 400],) `" {( C! s' o; O, S
- model: {
4 G4 ?/ `# ^- C- P( [ - renderType: "light",) w& e7 e" D9 U% F9 A2 @% H
- size: [1, 1],6 \: s! J/ p3 S5 C% x$ H$ o
- uvSize: [1, 1]
- q8 M: X- F& y( P0 a; D4 N2 J - }
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- let f = new Face(info);
0 [" F6 l- @8 n- c' A - state.f = f;7 [3 Y# J; R" G. W. \: S% o# @+ h3 w
7 f# G2 {3 ~1 j: ?- let t = f.texture;/ U( g: Q+ l y r
- let g = t.graphics;& M7 I, m- D% L$ K( c
- state.running = true;0 k" X! W# T& [' A
- let fps = 24;
# ^) d! `1 B# f/ k - da(g);//绘制底图
$ E, r6 [) p- B8 E2 w; v$ ~ - t.upload();
# }1 v1 W2 g2 P* J - let k = 0;
( E1 c$ B% x1 l; g# Q - let ti = Date.now();' Z! [6 E0 M/ i
- let rt = 0;' O0 C- ]9 z/ A
- smooth = (k, v) => {// 平滑变化
* @8 |; R0 t9 Q& A# | - if (v > k) return k;/ H! u. V$ }" _
- if (k < 0) return 0;& O* `+ ], M4 t4 G
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;8 t4 A' c9 u% B t2 {7 W
- }' \+ A; H+ {9 D' I& S& r& M
- run = () => {// 新线程+ V8 a0 E* }0 X3 w0 J0 X
- let id = Thread.currentThread().getId();/ f/ ] u1 d7 `- \) C- M
- print("Thread start:" + id);
' w7 m$ d, A) K6 D I( g - while (state.running) {, J% ]0 f' K& I
- try {
: y. G7 F9 G& g' l9 o1 W - k += (Date.now() - ti) / 1000 * 0.2;$ n. z( S. s+ p U
- ti = Date.now();9 i/ K. S" q" u- B! I; ~
- if (k > 1.5) {
4 m; X. u3 M& x7 f- M) x+ K8 m - k = 0;- [5 m- z$ y) U7 b/ ?
- }; ^2 ?7 i* [: m1 K# q
- setComp(g, 1);' E0 O/ T& \- H5 q% s( l
- da(g);
; a: v- b5 O) B4 O* M. ? - let kk = smooth(1, k);//平滑切换透明度6 }0 A7 D8 b& \" @, Y
- setComp(g, kk);0 ~3 p- d! I) \. _' ~$ u
- db(g);
$ p$ I, h% f# Q5 C; W8 @3 \ - t.upload();
1 `" m8 i ^9 W! l- R! t3 Q% l - ctx.setDebugInfo("rt" ,Date.now() - ti);
7 D* r: r7 F' [2 C - ctx.setDebugInfo("k", k);; m% m. d) p$ r) v" B. W/ ]
- ctx.setDebugInfo("sm", kk);( A S6 J+ n. F1 O; ^. E
- rt = Date.now() - ti;
' a/ K# t1 H2 L3 } - Thread.sleep(ck(rt - 1000 / fps));
& m0 ~, H9 \8 s1 S$ A1 ~3 w - ctx.setDebugInfo("error", 0)4 X: _- ?; I: F( }- d
- } catch (e) {0 B* h4 D8 Q+ Y% y" g3 [# [
- ctx.setDebugInfo("error", e);
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- }% n' q1 g& B. b
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
; `+ |! F7 ?3 q% n0 C - th.start();- J8 q" v6 `+ L* ?
- }
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! l+ {4 I. ]3 g: x- function render(ctx, state, entity) {
. O1 j* ~# Q4 l/ a+ ?7 @ - state.f.tick();' i' _: R# x( _& ~4 U
- }) f% _% h0 e8 C' G4 M
- # [7 I3 B% G# F- g& V1 Z
- function dispose(ctx, state, entity) {# B! |" h6 c t4 t' H& o+ l$ C
- print("Dispose");
1 ~9 z; F( j V& W h - state.running = false;
' F5 R3 G6 v5 h* ? - state.f.close();5 Z% Z0 W) J1 v$ A
- }
6 h! d" X$ H- Z* w# l% O* Z - 3 L7 C; T5 ~7 v: x3 g- ?5 }
- function setComp(g, value) {
: {" y- n( F" v - g.setComposite(AlphaComposite.SrcOver.derive(value));" f' }. W; j) U) g
- }
复制代码
2 X4 L& n/ s, N2 H. f, _7 U( b6 }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。7 Z7 d# ~0 X3 A% l9 k J
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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)* u/ ]3 O `% v/ }& |
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