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4 Y) k. ]3 Q1 A. I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。$ c* ^0 t! Q- B2 `- _, a
- importPackage (java.lang);
, l! O c/ m9 @ - importPackage (java.awt);
2 D- \+ {: ~$ Z6 ^2 y1 C - % B7 j0 }9 J) P/ M5 u* f4 i# m* T
- include(Resources.id("mtrsteamloco:library/code/face.js"));/ d8 s: `' D1 ^9 u
/ s) d) O* \& @5 d$ u* @ x# }- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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/ T( Q' e/ Y, X6 w4 q, @9 v9 |- function getW(str, font) {
; G9 Z1 g( k: R4 ^( ^+ S - let frc = Resources.getFontRenderContext();
8 e0 ?8 t# P+ ~! I. Y ?* c5 K - bounds = font.getStringBounds(str, frc);6 q9 q5 n6 ?3 L: S/ Y
- return Math.ceil(bounds.getWidth());
4 @" {. b! |2 @( k - }
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- da = (g) => {//底图绘制
& _% A- x* I( |8 K - g.setColor(Color.BLACK); m! z- _# K' m: J
- g.fillRect(0, 0, 400, 400);) f! K4 D! y; O3 j* x
- }
0 ]2 t" e0 W5 p g
/ U8 z u/ _4 p0 f- \: M- db = (g) => {//上层绘制2 ?* G/ t) o* G# Y+ Q
- g.setColor(Color.WHITE);
1 r: y7 ^" L& b- J - g.fillRect(0, 0, 400, 400);
/ `' F3 H5 Z! ~ - g.setColor(Color.RED);
7 c% |& w, u' `( F2 ? - g.setFont(font0);3 i' K+ Z3 I8 X4 q, I" Q0 b; }
- let str = "晴纱是男娘";/ @( n; v# I/ u: {) ^8 f
- let ww = 400;2 H- i( N) p8 G# W0 j. g$ L
- let w = getW(str, font0);2 A2 p$ G- P- ~# a$ u
- g.drawString(str, ww / 2 - w / 2, 200);% e0 F( F4 a# h* k; ]% x
- }6 v2 Y# r2 r5 X& }8 o0 f
5 H6 k! j% ^4 ~1 d: V- const mat = new Matrices(); v1 h' g2 w) k4 M& D; m% U
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
! O; d& D9 }. Y4 V1 C - let info = {5 L' I" H2 a; }# j* K5 K
- ctx: ctx,
" n( |3 W7 Q q% u - isTrain: false,
7 ~4 _ C, i) X - matrices: [mat],6 C8 t+ l: _. C7 r, K
- texture: [400, 400],
: G6 T; o3 _( B- x6 ^0 P3 C - model: {7 E' y2 a* }0 j% I8 e
- renderType: "light",1 q: ~+ D3 I+ g6 @5 I" ]; ~
- size: [1, 1],
. L' Z! Z- J: r, p$ {0 s1 \ - uvSize: [1, 1]
6 l# `7 A2 q9 \1 ]. P% | - }8 _, |& q5 ~2 `" O2 `( H7 L
- }: g- F$ g: I8 h2 e R( Z, q
- let f = new Face(info);
) g6 Z+ @, b4 S) \1 w, b - state.f = f;
9 T Y& `! N+ V8 L - : R( Y1 m* Z7 Z
- let t = f.texture;
% V( b1 W9 P8 q+ G3 Q - let g = t.graphics;. X! X6 k5 F8 Z% ~" f: G! Y) H
- state.running = true;
6 M, W. s, H& q2 V: q, D- T: p: A) U - let fps = 24;
9 m v N0 p! p - da(g);//绘制底图% F4 |4 V; e, F0 p# S9 V
- t.upload();: `% \& S5 p( X8 d' Y+ X! Y. ^
- let k = 0;- i6 ?* o u. n9 q6 \
- let ti = Date.now();
$ `* X7 D z5 ]0 | - let rt = 0;5 j- q7 F _9 h3 u* {, W
- smooth = (k, v) => {// 平滑变化( ~+ w1 W+ G3 s6 W }5 v& S
- if (v > k) return k;
" r$ N. D' O3 w3 K( O - if (k < 0) return 0;
4 \# f: q/ ~; i0 E - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! u7 p3 U2 P9 ]3 D. t0 r H - }
4 S; `3 y( K& @5 _8 r7 ~ - run = () => {// 新线程, p& r( p# |1 C% J a. H; G/ v( g
- let id = Thread.currentThread().getId();1 m" `9 F/ i1 E( ?. ]+ _! k* Z+ t% e
- print("Thread start:" + id);
& r. o' g: `% B - while (state.running) {- O& L8 K: H7 q
- try {
# B# D$ o. Y9 x/ P; i - k += (Date.now() - ti) / 1000 * 0.2;8 g D4 h7 y0 e) s1 j# ?
- ti = Date.now();1 j, b1 t0 I" P* X
- if (k > 1.5) {
- r. T \ I. I J! [ - k = 0;( H: B; T! g* f6 B
- }) I# o2 I- o3 ~& @4 T# i
- setComp(g, 1);! I' a* G- D, O6 d0 ~
- da(g);6 W( e/ o8 X) W" G2 k
- let kk = smooth(1, k);//平滑切换透明度
2 E8 H& t% q! q$ a6 S t$ W3 r - setComp(g, kk); L: ?0 k7 T1 O/ f( k6 a0 G9 T
- db(g);$ Z, x1 e" C6 Y& U) h, F- H
- t.upload();( j0 O$ b1 d2 W4 f
- ctx.setDebugInfo("rt" ,Date.now() - ti);
2 f" T! [) s1 T) E% L) w' C - ctx.setDebugInfo("k", k);( [/ I/ j6 i& _# n( `2 K/ W6 G- o
- ctx.setDebugInfo("sm", kk);$ Q5 A- x X! F k
- rt = Date.now() - ti;& f- M2 b1 [& X7 E& X2 p4 c' t" D
- Thread.sleep(ck(rt - 1000 / fps));) `6 J+ e5 e& e
- ctx.setDebugInfo("error", 0)1 ^( L1 o @7 C5 n5 C1 s
- } catch (e) {
7 \9 E4 X, F- L3 t, h& l, k - ctx.setDebugInfo("error", e);
) S0 P! E9 b9 }% h+ ~ - }
' W# |5 [4 v# V( b1 I - }
, X% p+ ~9 g7 s! g - print("Thread end:" + id);
6 [0 k% x; e; x o - }) J' n$ \6 S9 p4 f) M; }5 g4 R [$ d
- let th = new Thread(run, "qiehuan");
, ?* p# U! t( k) D \3 D/ [ - th.start();
X# G- C% J) O; \ o% B# x& {* }) j - }
( k$ C8 S4 O% S' y! y
& f, U" X. V, U" I" W- function render(ctx, state, entity) {
5 r6 j$ N o, ~3 @2 i6 `, p - state.f.tick();
5 u5 X4 a' `6 C+ n - }+ Y# Q' {1 T+ q7 T1 T$ B
, `2 K7 A1 K: O# f* I: v- function dispose(ctx, state, entity) {6 l2 J& D+ S X
- print("Dispose");
2 c, n2 ^' E, F f - state.running = false;
% c& m9 r" O; g) i5 A! [ - state.f.close();5 i- c- @1 ^) U5 A* j, o. v
- }
, o3 n8 j+ [7 R* o% |8 S - % Q) ?% K+ I# M* e* |
- function setComp(g, value) {% }4 W6 D0 ]& a! w5 R8 U
- g.setComposite(AlphaComposite.SrcOver.derive(value));
) h: S% E: W+ y# E% E* j - }
复制代码 7 F. ]& t+ O' ~! i! c. h% o
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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% {* A# x7 {$ n) H% |) D; [" Y: Y n4 m! t' {7 z7 k
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)) }3 u/ s# g h3 m3 V# h! H
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