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; z! U ]3 g- X$ {. t# [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。2 E( _2 {- m v$ F0 {
- importPackage (java.lang);
! N0 U4 H c3 I% s y* f* q - importPackage (java.awt);
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" g/ ^) j3 E! G0 K- include(Resources.id("mtrsteamloco:library/code/face.js"));! L6 s. T8 A4 B8 F3 \0 j, q
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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1 L5 @0 G% C* y( _% C2 E' C- function getW(str, font) {
! V6 d# S1 B, x$ ^ - let frc = Resources.getFontRenderContext();7 [2 K( O; \7 \7 e+ w
- bounds = font.getStringBounds(str, frc);+ J) O- G7 f2 r v% U
- return Math.ceil(bounds.getWidth());) U" w1 \, e8 y0 \, |* [
- }
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- da = (g) => {//底图绘制/ [* h) v" B5 \; }* @9 d4 w
- g.setColor(Color.BLACK);
# Z2 s" f8 z' G! P* I# j - g.fillRect(0, 0, 400, 400);
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- 1 {, {9 s, h% K* l" ?1 C$ J9 Z: O
- db = (g) => {//上层绘制
" ~2 H+ o' W- N& |" x0 E5 l - g.setColor(Color.WHITE);
9 b Q8 K3 }1 a5 ^( |; U: d- Z" o - g.fillRect(0, 0, 400, 400);" F$ w0 f0 ^2 g+ F4 s! [- C! s
- g.setColor(Color.RED);' G2 N( g& X4 I/ K8 |" g' a
- g.setFont(font0);6 K- A8 N0 e H& o( X. |
- let str = "晴纱是男娘";
\# u2 g* A# H9 j - let ww = 400;. T+ p8 D1 b2 b+ N/ R$ v5 i
- let w = getW(str, font0);
0 e* ?) I' B4 a& X( M* { - g.drawString(str, ww / 2 - w / 2, 200);
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& D6 k! \7 E) v- S5 P1 z5 W4 Y- const mat = new Matrices();
7 g, G5 u& r2 R- g) |) R; p - mat.translate(0, 0.5, 0);
, c G# ?" k" {
& T: |; h k+ z: |# @. ~- function create(ctx, state, entity) {
) b% K6 O) A( g0 O7 c - let info = {
. m" z+ O) B6 k8 a6 s9 F. n4 y4 F - ctx: ctx,
* ~& u0 S; W1 Y# f. W w" F - isTrain: false,
# @% @! |9 g E$ }( y8 d - matrices: [mat],8 `4 r% }1 L1 u) J4 P% x
- texture: [400, 400],
5 w9 f8 `" s3 o5 e/ l. z' H8 k - model: {0 X# j9 B a0 T. m
- renderType: "light",, V# z8 V6 g% ~+ L+ d9 D# h# c
- size: [1, 1],
) x3 q- j8 }9 p, p - uvSize: [1, 1]: G; \' E$ u: R" L
- }
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- let f = new Face(info);$ N/ Y+ u+ ^3 f4 c
- state.f = f;
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- let t = f.texture;
" j9 O# w, i7 ~& [# C - let g = t.graphics;% d, |: k y7 ^. P8 I1 s
- state.running = true;
( {9 ^8 t% Q. ?4 a+ W7 Z n' S - let fps = 24;* Z- @8 O( @& G2 j3 c
- da(g);//绘制底图& m" C/ w# ^ K/ t5 U# h: f* K/ m! `
- t.upload();* }# f+ ]6 E, V; ?& Z# T
- let k = 0;
! G- P# @2 F' q X - let ti = Date.now();3 P% K; \4 j5 s% ?# _( p
- let rt = 0;7 j# }# ]) y( u5 ~2 H
- smooth = (k, v) => {// 平滑变化
* ?2 A) `2 o5 t- D" z - if (v > k) return k;; Z. r+ @ j5 S& T2 H7 `. }
- if (k < 0) return 0;
4 ~6 H1 ?! e _( _ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) \2 ]* M' g- Q6 K; y7 |, v
- }: K+ r3 K5 f$ x1 u9 M
- run = () => {// 新线程
% N: W4 B3 x9 f, E3 l6 {* j - let id = Thread.currentThread().getId();
1 n' G; F/ Z. b - print("Thread start:" + id);
" w& y8 _- ?; [7 O$ I - while (state.running) {
* R6 Z3 b4 i+ y - try {
4 e m4 f9 \, m5 i( a1 z - k += (Date.now() - ti) / 1000 * 0.2;; V. o0 p3 A$ |7 g. p
- ti = Date.now();% l Q r. ^: H0 p$ D
- if (k > 1.5) {: y5 O0 E/ f7 g6 W' S# V
- k = 0;
; e' j$ ~! @# A5 ^7 B0 t5 M - }$ K3 b! H7 E4 H6 h. @6 n/ ]( R
- setComp(g, 1);
( m1 B" s S- @+ u- J6 Z, S6 N; Z0 o - da(g);
( |1 r: D! y8 D - let kk = smooth(1, k);//平滑切换透明度
& w6 s! w& U/ n7 p - setComp(g, kk);
6 m8 @: I7 S* K8 T! m O - db(g);) G$ k3 p9 [ C5 W4 P0 g7 r
- t.upload();
5 V/ i3 u# h* a5 l: n. p2 Q - ctx.setDebugInfo("rt" ,Date.now() - ti);* @+ s- H ~) @- I" i1 T
- ctx.setDebugInfo("k", k);
# J0 m: D+ x4 L - ctx.setDebugInfo("sm", kk);
; s) `' [& }& E- }9 P+ s, h - rt = Date.now() - ti;
& q# k# r( Q3 p0 B% Y - Thread.sleep(ck(rt - 1000 / fps));
% a* s @2 U2 w# h% _1 w4 U* z - ctx.setDebugInfo("error", 0)
+ ?' o1 `: n# V0 h - } catch (e) {* w4 }8 l3 j8 h2 {+ \ E/ }( i$ _
- ctx.setDebugInfo("error", e);9 J! o: D* ~/ F
- }. u! S3 ~$ i. t' |
- }# J9 Z. b% H/ l6 E% h. {! Z
- print("Thread end:" + id);
- l8 B+ p4 C- @2 k. _' W& }9 C - }/ Q9 B6 `% @4 [
- let th = new Thread(run, "qiehuan");
% \* i' i: t! V0 \* B: Y - th.start();7 b9 U# I3 k( _# H5 l D
- }
; K3 ~# u% M# X
, b) T% I! D% x1 M, C$ L; l1 @2 a- function render(ctx, state, entity) {
7 i: r& u' q+ R" X |/ L" o - state.f.tick();8 \* F V2 C! }" S& B8 M* h
- }
( u5 f2 e# T, }* T; K) p" ? - x2 @% k7 }' j" C* ]+ d4 B2 i, R! ?
- function dispose(ctx, state, entity) {& n4 { t' y8 Z) H% S8 Z: B7 I
- print("Dispose");
1 Q% X) z& U& T/ \/ A5 Q - state.running = false;$ A( s* @- Y. _
- state.f.close();
% g6 P9 ?3 S$ f5 }6 }8 W - }# ~; M: _( O7 t+ s+ g3 s' w1 I- P
: [0 D! G/ l; e" \) v& {! ~9 ^- function setComp(g, value) {
" `$ e+ Z2 y# E - g.setComposite(AlphaComposite.SrcOver.derive(value)); x6 ^/ |1 W$ Q: A- Q! c
- }
复制代码
$ t: p( W$ K5 O8 J& z% 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。: r( S3 E! _+ k) ?5 a9 o: r& m) i
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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)! g* o1 n! e2 U9 f" F- Q3 g$ ~4 K, a* D
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