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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。2 a2 S- S3 Y: c. q$ J
- importPackage (java.lang);5 B" }- M) i( ^
- importPackage (java.awt);
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$ D! i7 a$ I; t* u4 ~- include(Resources.id("mtrsteamloco:library/code/face.js"));; M+ i9 w8 j; a" Q" l2 L
, ]5 q4 B6 z* _" T5 V0 _2 i- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);0 h* P: w# f6 N0 _% ]7 N
- ) a' U7 c3 J& b* f
- function getW(str, font) {0 R0 R$ q3 A7 g1 ~# \) X0 D# M
- let frc = Resources.getFontRenderContext();! u T: K# s0 ~+ h4 l
- bounds = font.getStringBounds(str, frc);
# r6 |! y- J. Q' Z4 D' N4 G. Q - return Math.ceil(bounds.getWidth());
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. [- L$ f8 g& a' }9 X2 m/ w/ {- da = (g) => {//底图绘制
' z. `3 K) o4 `- Y - g.setColor(Color.BLACK);
3 f: r4 }2 Y# U! @ - g.fillRect(0, 0, 400, 400);% @+ f& O* h$ F9 C, Z& S
- }
& q6 _# j- i2 j' A5 c7 D - ! ^$ m, z7 H3 R6 V2 r5 H
- db = (g) => {//上层绘制2 [+ S* ^6 H' W$ a8 Y n! v$ `' ~; n
- g.setColor(Color.WHITE);' D0 b7 f0 ^% A! [- Y8 e
- g.fillRect(0, 0, 400, 400);
: Z: U/ b! M/ _1 @; G; h - g.setColor(Color.RED);5 u7 h4 ]( W( c" P+ ~) s0 R
- g.setFont(font0);
# d+ u2 S, @: v- s$ } - let str = "晴纱是男娘";
n, l9 g/ a# _7 @5 J* ^8 p- M - let ww = 400;) {. ]$ a+ u# t( I
- let w = getW(str, font0);
5 N5 `5 e9 Y/ ?0 {$ W7 U - g.drawString(str, ww / 2 - w / 2, 200);
. E) O& B, Q" i5 D; a& z/ H - }
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0 M/ H- I h* b- d$ ]( H H" w- const mat = new Matrices();, F8 U3 [' o, e+ y( T1 V, l
- mat.translate(0, 0.5, 0);
# P* g) j, T1 U/ v; G `. X; H
- p& e4 @, ^0 U& b1 E8 ]. D- function create(ctx, state, entity) {
# {" O/ C* W+ t% b - let info = {8 G# U3 F h0 H+ b9 Y' ~
- ctx: ctx,. l. U* y2 s3 m- b* a. U$ O+ C
- isTrain: false,
, B0 p9 m6 \) U; f: T3 t - matrices: [mat],2 |7 c) d. ?) G, G% @+ ~+ K; {* l
- texture: [400, 400],2 u8 @; z% \" }7 D
- model: {
s, ?' @: U- m* j; P - renderType: "light",) D" n8 {, Q' }; G
- size: [1, 1],# [7 h% D8 U( `7 L- @
- uvSize: [1, 1]
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- }9 m2 h+ \9 ]( h; x
- let f = new Face(info);- T* G+ D- c3 x% U! a
- state.f = f;
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- let t = f.texture;
( X: W" ]8 e8 w5 F- | - let g = t.graphics;
, s# L: I# I) k9 } - state.running = true;
. X: w' n7 z7 V - let fps = 24;8 Z- [; t0 ?3 V4 O2 [( E' N5 k7 `
- da(g);//绘制底图
2 \. I) w7 M3 f$ ~2 J - t.upload();$ T! e* M6 ]* J0 @
- let k = 0;6 w- O- {) K, |" R9 X. Z
- let ti = Date.now();/ z( d2 I3 Z0 ~
- let rt = 0;% L7 k+ k) P7 P
- smooth = (k, v) => {// 平滑变化
9 v' c5 Q# d5 f7 @ - if (v > k) return k;; X1 {0 N- z! ^2 w. L/ v$ n& l
- if (k < 0) return 0;+ T3 n7 r' x( a V. S
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
5 _" h( K& T2 `& z8 q3 X( ]! V - }2 w1 c! S3 X: K% F& n
- run = () => {// 新线程7 }6 T; P0 H5 X6 Q
- let id = Thread.currentThread().getId();/ X# u9 ~. Z5 |3 C! z
- print("Thread start:" + id);! b2 E, N( v, f2 T% p* i
- while (state.running) {
. e v8 v+ u9 \( W- `/ ^- P" |' F8 m - try {
& V. i3 l8 |6 B1 T& W - k += (Date.now() - ti) / 1000 * 0.2;
/ F" I$ D3 w& R0 F; x- L - ti = Date.now();# D! Q* ]7 ^3 W
- if (k > 1.5) {
; H) |6 p. H1 O - k = 0;& ?+ L5 v) l' l
- }& {. X5 C/ Y( U- V) d
- setComp(g, 1); O" ?' \; L) o/ x6 _) {
- da(g);2 q4 ~9 u7 b# k# ~: A# Q/ y4 m6 n7 i
- let kk = smooth(1, k);//平滑切换透明度+ |5 \$ i2 R& x( {+ ~1 ~* K. b8 t
- setComp(g, kk);$ [# ~: Y6 g. f
- db(g);6 J/ Q$ `+ h8 F _& ~
- t.upload();
8 P5 u! o* }+ M% M9 J - ctx.setDebugInfo("rt" ,Date.now() - ti);
+ P6 d3 n" C6 b* c0 G - ctx.setDebugInfo("k", k);1 y# p f9 u" }9 A& T# T: ^
- ctx.setDebugInfo("sm", kk);! v. a/ `4 G% A9 L" x2 q" A G
- rt = Date.now() - ti;, _. Q2 S! J1 y! A
- Thread.sleep(ck(rt - 1000 / fps));$ ?7 ]9 U3 f9 j/ A7 @' j* @
- ctx.setDebugInfo("error", 0). U6 ~0 _# p& |+ ~) ]4 k+ |
- } catch (e) {
' [! l$ Y! M5 i" B+ o# v - ctx.setDebugInfo("error", e);% \& a& o |% d' O" ^
- }- |9 s/ {$ K. r; }) V
- }. K3 P5 E/ ?' r5 Q
- print("Thread end:" + id); @. f+ r; L6 r
- }
4 ^/ q3 k0 H- B1 @- m& l - let th = new Thread(run, "qiehuan");
- f1 O* }) g- _% }3 }2 J$ h - th.start();, r" Y$ v7 o' y: I q: t& l
- }
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2 w) \" s, k' i6 W- function render(ctx, state, entity) {: w @ @- J( P' u. `; x; Q
- state.f.tick();
$ z, N$ O7 g+ \! W6 u - }
! n! h1 T" _2 q: \& Z) I, m3 h( j$ ? - 0 f2 G( c8 E' F0 o4 M5 J8 E8 Q) Q# ^
- function dispose(ctx, state, entity) {
$ j, ?1 G# X& a. C2 z - print("Dispose");& V/ \* Q" K0 U
- state.running = false;
x D: b. @+ |) ~! U - state.f.close();, s- O6 {" p8 x) P* u7 o7 [
- }
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1 E# t0 a5 p! s- function setComp(g, value) {! [; m6 j! B' B& U, m. r
- g.setComposite(AlphaComposite.SrcOver.derive(value));; w% V' Z' K0 G; }
- }
复制代码
: r* a4 i" }( ]* j2 J) Z& E: U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。
9 {; z% t9 ^1 j7 y# E& m- E) i. }5 F) V& N1 A& J, `
/ A, y" B# J1 ]% E/ j; H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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