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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。
5 _" S% \" h9 H( {6 \: K( Y2 J1 A$ P- importPackage (java.lang);5 w$ L+ z1 d# v) B
- importPackage (java.awt);
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4 R: _9 T+ o0 \" L) h: |* Q- include(Resources.id("mtrsteamloco:library/code/face.js"));9 R5 L& E$ R( C5 @
( B ^5 D# D! {0 D. M- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {9 ^3 F" q0 Z7 h8 R
- let frc = Resources.getFontRenderContext();3 W) i& i& L1 Q, U
- bounds = font.getStringBounds(str, frc);
$ Y0 Q$ b7 q3 @/ g" Q - return Math.ceil(bounds.getWidth());% F+ s+ s) [- k) n# O h
- }
$ A1 E0 c3 m/ _
( [) W3 a8 k; Q6 j3 @6 k- da = (g) => {//底图绘制6 [4 u; ^: @5 l' d$ d: U
- g.setColor(Color.BLACK);. P& h% \( I' N' v9 Z: E- H
- g.fillRect(0, 0, 400, 400);4 N' T5 n0 c$ f: X
- }* n8 }% i' ~2 V' }& ^! Z
" a* T/ z' z/ H( k$ D- db = (g) => {//上层绘制0 ^6 ~4 U' _7 O5 Y
- g.setColor(Color.WHITE);& f* s& W$ F# a- l# Q8 c
- g.fillRect(0, 0, 400, 400);
& U/ E' d+ ~3 L9 ~ - g.setColor(Color.RED);
; b1 N; k' v N1 V9 W; g - g.setFont(font0);
" c( H/ S7 k9 d. c! a - let str = "晴纱是男娘";! P- {# e g* V$ a- ]0 Q
- let ww = 400;% [) z4 P% K5 U8 H6 ]$ u
- let w = getW(str, font0);1 l- p4 q. r; K/ l
- g.drawString(str, ww / 2 - w / 2, 200);
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- 4 d+ _' T n, x
- const mat = new Matrices();( p% I# C5 \8 B
- mat.translate(0, 0.5, 0);' w% G- w0 `+ J6 I
- * V& m, }" n& g" q' ~
- function create(ctx, state, entity) { a$ u/ b5 @7 E. \& l1 v
- let info = {; Q( E7 ]( e; `5 f7 Z5 A
- ctx: ctx,
4 M- k( @. t5 c4 l* Q - isTrain: false,+ p5 [' t; A4 b- l( j
- matrices: [mat],
$ U* N3 J1 x: G3 q* m# O/ Y - texture: [400, 400],1 p5 R' d( O" a: C# Y4 H
- model: {
1 v. x* L% x# c5 t f - renderType: "light",
2 `; P/ M: \( x: C- N: a( D - size: [1, 1],1 @6 M F0 R7 d4 [$ f6 P9 B
- uvSize: [1, 1]
0 g( l6 Y5 K$ G6 r# u/ T - }
# \2 J* y( s9 u3 u" { - }
1 U/ d6 ?1 ^7 F5 a7 s4 w$ }# p* e" R - let f = new Face(info);4 t1 |4 Q' F/ Y! U2 v# s
- state.f = f;
0 T' {# J/ j* G3 W - 8 n( ?& ]$ V+ J1 V
- let t = f.texture;5 |/ `- T# `7 c1 y
- let g = t.graphics;9 e: P$ z2 q' m3 y% y6 N, l+ H, y- H
- state.running = true;
5 P- G% b2 O. z0 z! P - let fps = 24;
+ u& e9 c$ W5 i0 s8 \ - da(g);//绘制底图
! ?8 \' Y; O- Y( r# @: u# e" M+ q - t.upload();" V4 s* h' o. ]1 ~
- let k = 0;) p; Z3 v0 Z5 S, [- ~ N& {8 _
- let ti = Date.now();# y/ T, L q: V! G: M
- let rt = 0;3 z/ N" m7 [- Y9 M4 q
- smooth = (k, v) => {// 平滑变化
9 T( g- q- J$ J, ?5 n0 H7 N1 Y - if (v > k) return k;
- `% s0 O+ s$ ?- @; X, ~ - if (k < 0) return 0;
* a- f6 C# k4 w; q. ^ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;/ m, l" Q3 v6 q q
- }
2 |2 W) [# Q; y4 B2 `9 Z - run = () => {// 新线程4 p* B& w. f6 \6 ?
- let id = Thread.currentThread().getId();1 C* d* H' Y! ~( k- N0 K
- print("Thread start:" + id);
7 E4 G* R+ ]4 U6 U - while (state.running) {
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- k += (Date.now() - ti) / 1000 * 0.2;. d! |. ~8 ?4 O! e+ X
- ti = Date.now();& f6 w" O* x& Y/ ?0 F0 R: j- z# l; a
- if (k > 1.5) {
: c- G& k- _+ b8 H1 E) Z8 m5 r - k = 0;
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- setComp(g, 1);
: J2 y5 o: p% B, W/ v1 w: I) C - da(g);
4 O. c4 |+ K# ~4 F* I* q - let kk = smooth(1, k);//平滑切换透明度4 d6 M7 l g2 x% Q$ j. }3 o
- setComp(g, kk);
0 f2 O( f) t# y8 u" ?* N) X - db(g);* q' x" N u" e8 H
- t.upload();* _" Z& u( o! o- Y* f! ?
- ctx.setDebugInfo("rt" ,Date.now() - ti); {) t+ B7 Q3 M
- ctx.setDebugInfo("k", k);, I' r6 H% Y' b& v8 S
- ctx.setDebugInfo("sm", kk);
, ^" r5 Q% J" {+ r& G - rt = Date.now() - ti;
# n# P% Q: @: Y* E' O9 o4 j. g - Thread.sleep(ck(rt - 1000 / fps));( o4 Z2 v% ^* y8 D1 o
- ctx.setDebugInfo("error", 0)
: X, L5 H1 `7 L: _% \" j/ ` - } catch (e) {- L, g1 r8 |- p5 M# M
- ctx.setDebugInfo("error", e);
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- }, Q) ^9 G! s# [! d0 n# M6 P
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");+ G h' d# v" ~% o/ y; f5 N3 R
- th.start();
; e8 ?+ j u$ c5 F - }
& l) f1 W; n2 C1 ` - . E' \1 r2 j# @( ]6 g" ^
- function render(ctx, state, entity) {
0 a' s6 `' F+ U - state.f.tick();
5 e9 o0 l- D0 o/ Z - }; R9 e" b2 G' }
7 Y: B5 J6 m) g0 ?% Y3 M+ _- function dispose(ctx, state, entity) {
) k f( U k# |7 h - print("Dispose");7 [6 S# n! h6 \& d) h1 J7 c
- state.running = false;# W# U2 W. g: N5 @0 N
- state.f.close();9 y+ T: u* `: T) B p8 `9 k" B: i
- } `4 z. N) C7 | ^4 Y
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- function setComp(g, value) {
! h9 o$ h0 w. A - g.setComposite(AlphaComposite.SrcOver.derive(value));) _+ N% T# P1 ?8 U* r# L( ?8 U
- }
复制代码 " l, z5 D. a3 D- u$ W, d" { w. H
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。, [4 D& S6 ]3 W3 ]# r0 m! b
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9 X& n1 F7 S$ C' X2 s O) B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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