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! o- A) E6 P' s# @" a; y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。) f$ q+ \: C; s; Q( F
- importPackage (java.lang);& t* |3 K/ B5 @7 |
- importPackage (java.awt);
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: ~( s* g" _5 p6 O* u- include(Resources.id("mtrsteamloco:library/code/face.js"));
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; n; H& ?2 o3 J- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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) T1 @- X- g& q2 w- function getW(str, font) {
Z) ^& L% E' b+ Y3 L - let frc = Resources.getFontRenderContext();. F0 h. E7 \4 ~+ b! E" X/ K2 N
- bounds = font.getStringBounds(str, frc);
z2 o& [. v4 ]9 E8 i' e - return Math.ceil(bounds.getWidth());: r. x3 z/ H6 L
- }2 L( \/ a5 V# m H; b5 n1 o
0 w! R& `6 Y3 S. k2 R- da = (g) => {//底图绘制+ l; ?) I N$ {" F" J% D
- g.setColor(Color.BLACK);
' S* a' U$ d; q. W: w' e2 t - g.fillRect(0, 0, 400, 400);
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- 3 ?- ~$ c' {6 H w
- db = (g) => {//上层绘制0 [2 d* l) b2 f
- g.setColor(Color.WHITE);
: I+ V4 T2 ^& K: u* h5 _* e - g.fillRect(0, 0, 400, 400);
* [- Q8 _5 m0 I' W" Q8 G! [& Q - g.setColor(Color.RED);% v! S7 U+ i& d" `" H3 U
- g.setFont(font0);8 T+ z& a" ~& C
- let str = "晴纱是男娘";. M- u2 c7 z' V/ q3 k
- let ww = 400;4 T2 {$ M* [$ Z5 X
- let w = getW(str, font0);
# E. K9 _1 L, O# H" y - g.drawString(str, ww / 2 - w / 2, 200);" ~1 T% g! J \: K% z$ S) y
- }
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2 H* ?) E3 F0 P5 r( Q I* Y- const mat = new Matrices();
8 v H5 e/ [: l# v$ l0 _: }" G - mat.translate(0, 0.5, 0);
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7 v5 g4 ^ d) E7 a2 n) w- function create(ctx, state, entity) {
4 |/ W2 p8 P1 _7 }3 z5 O - let info = {# u0 b+ S9 [. n/ x
- ctx: ctx,
" n; A5 l% C& N0 p, i, j+ r# p - isTrain: false,
. ~! l" {1 k! d( `- W8 y - matrices: [mat],( V' S/ m5 q2 e8 u
- texture: [400, 400],
+ v8 R0 e) }7 a, n) w - model: {* n2 i7 c/ ^3 D+ X# `9 ~1 u5 G# x
- renderType: "light",( s7 ~9 w% L' m5 ^) _/ A8 M t r5 {6 Y
- size: [1, 1],
1 v8 A1 i1 e, ~! H - uvSize: [1, 1]6 I) t V0 G1 y3 k b, H
- }
. ^5 Z7 g Q ]* E4 C - }
! o9 K4 F$ N: G' y - let f = new Face(info);
; P7 \" p. r" | - state.f = f;
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- let t = f.texture;# j4 P! y0 i, H% h3 j% R
- let g = t.graphics;8 a. e R- k( X! W
- state.running = true;/ ?0 u2 j! O: h$ d4 B" P
- let fps = 24;
2 h: _' V" t% F) f& w* Z6 J/ m: n - da(g);//绘制底图8 a1 t; u/ D9 R6 B0 B+ x2 ~
- t.upload();
& t+ ^3 p4 G+ r+ }- e8 O4 \ - let k = 0;
, |' G9 R: R$ z3 R! s - let ti = Date.now();
; C q9 |$ M* m2 R+ `, F7 g - let rt = 0;
8 \& O% r/ F. h$ {# e - smooth = (k, v) => {// 平滑变化
2 t0 ]- I% {' g A0 q - if (v > k) return k;
& z$ R+ M2 i+ U' a# T- ? - if (k < 0) return 0;/ ^3 y0 H' c( o
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;4 C3 C" y1 d, U: E2 V5 i9 [# R
- }- _: L1 B" R0 ~( {
- run = () => {// 新线程
$ @) S! c2 H. L# L2 s$ \ - let id = Thread.currentThread().getId();
' c% I" V7 Y& u" v - print("Thread start:" + id); h/ V% ]5 N; [# W9 a
- while (state.running) {) p1 Z9 L! E3 j* o7 ~7 S
- try {
' k/ P& E. k$ Q3 l+ o' h - k += (Date.now() - ti) / 1000 * 0.2;5 b) W9 z9 v! A* `% e7 |8 [) T2 P
- ti = Date.now();, _4 U- u9 v- S% H, Q
- if (k > 1.5) {8 ^1 L/ V/ R9 f' i
- k = 0;
0 U' c- y7 _* [( j8 U - }
( w1 _* z: ~! o9 Q3 T8 s - setComp(g, 1);
' v* L! V: r3 c0 f- ^) A" s - da(g);
4 {+ n K) F9 F0 \ - let kk = smooth(1, k);//平滑切换透明度# ]& n- h, _9 j8 M/ q' a3 X2 S. ]# {
- setComp(g, kk);2 ? K. [2 ^7 {8 g9 q
- db(g);* J- ~4 d) R, u# ^ t
- t.upload();! A& j" r' F7 ?" Z( _/ t% e
- ctx.setDebugInfo("rt" ,Date.now() - ti);3 r0 o. g: H0 J+ {8 i
- ctx.setDebugInfo("k", k);
4 F, a3 u# j; E4 x$ a; |$ c - ctx.setDebugInfo("sm", kk);
% X1 i+ ~* B. [1 }4 F" c - rt = Date.now() - ti;
" y" G! W, Z5 e& N- L9 ]2 i0 k - Thread.sleep(ck(rt - 1000 / fps));
, N" V/ b* |1 s1 l) i - ctx.setDebugInfo("error", 0)
) d- H# [ y# b7 `0 S; B7 l) c: P - } catch (e) {* ]+ T4 r! S9 S/ g+ d
- ctx.setDebugInfo("error", e);
& H* k* |& s/ _3 Y& h2 [ - }
+ J$ @( ^/ r8 U4 v; `3 c - }
- F i- O7 ?0 I- | - print("Thread end:" + id);5 t- p. q3 v8 Q0 V5 E: R8 q' a
- }
% ~# b1 z4 }: ?! o$ f( k" s, n" h& p q% E - let th = new Thread(run, "qiehuan");
: S$ j, r" [8 s( I" |- G* E+ x - th.start();+ @# C$ _! }7 _" v
- }
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$ {( u& H" G& f: V$ j; `- function render(ctx, state, entity) {
# F+ X' h6 i+ V' h$ i4 E - state.f.tick();
4 c" a4 R$ y0 i, x: h9 g- t - }
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! A9 G( @% I4 y" y# h- function dispose(ctx, state, entity) {
/ g n0 }& Z# ~2 y - print("Dispose");
A# l3 G/ O/ b* i - state.running = false;! Q) j6 {" n( y# k$ J" B
- state.f.close();7 Z+ a4 w1 C6 r! N8 ?5 K
- }
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- function setComp(g, value) {6 Z* n) y3 C! p+ r
- g.setComposite(AlphaComposite.SrcOver.derive(value));
3 X' j4 V4 h; p9 ]6 J9 @ - }
复制代码
8 Y5 E" b- R) S. I- s4 x! j9 A4 q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。2 b0 |5 k$ Z# z- W& p
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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)+ T# e9 ~3 t# ^$ M8 R G
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