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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。0 _0 G: D& z& r& s
- importPackage (java.lang);6 j ?3 g6 X d' E) M+ j
- importPackage (java.awt);
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* w$ g4 Z2 C: Y4 o( t- include(Resources.id("mtrsteamloco:library/code/face.js"));' l9 u) F& W1 N0 u7 ~
3 Y2 r- F, G+ W& ^: a- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {0 n* W0 N6 c1 {5 `- W
- let frc = Resources.getFontRenderContext();
+ C, d) K2 l8 U* I8 D - bounds = font.getStringBounds(str, frc);& c/ q% X4 N$ l) v5 y$ j6 X
- return Math.ceil(bounds.getWidth());- }+ b, Z# ]0 p; `) s
- }8 c3 c9 b9 r, X9 J" }
2 W% w5 v3 N2 i @. V- da = (g) => {//底图绘制7 c9 z8 b O) p6 ~& _" F8 r/ @
- g.setColor(Color.BLACK);0 E6 v" Q, G8 Q6 `+ j
- g.fillRect(0, 0, 400, 400);* H4 o X- x, `0 n5 z, o
- }
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9 A7 ]! h" r4 U1 U2 C) l- db = (g) => {//上层绘制
# z5 O/ g- S6 j+ S% q* M - g.setColor(Color.WHITE);
6 S8 c3 M; F, Q; @5 @ - g.fillRect(0, 0, 400, 400);
2 _7 ~1 h4 k, @3 b - g.setColor(Color.RED);
/ A: l+ \/ w' S) L* |2 }) R - g.setFont(font0);5 [* w4 B6 O3 J
- let str = "晴纱是男娘";
g$ N7 J: S4 p8 r S - let ww = 400;4 M1 f- ~3 M5 o) C( u, D! @) Z
- let w = getW(str, font0);
' p8 [2 j* @) q, w0 y& I3 ~+ c+ Y - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();
! r# B. y; [) B- [! H9 h - mat.translate(0, 0.5, 0);
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& y- H& B2 Y! P$ I' c- function create(ctx, state, entity) {
3 O# S- N }' p8 n$ T. c1 I5 G - let info = {. X# b( N/ f# V7 B* c$ A8 j
- ctx: ctx,
1 R% e4 U: q. @# `$ f - isTrain: false,$ W% } F6 Z+ V8 H U* Z2 j7 [# z
- matrices: [mat],
3 R" g+ [; f8 m - texture: [400, 400],' b5 ^% |/ x+ F: M5 T* }
- model: {% Y' L4 X; v! ~8 }8 Q2 g& |) }
- renderType: "light",7 B# {# P6 `; J9 H7 |3 U* F6 i
- size: [1, 1],
, S) l; o3 p+ S: }$ j - uvSize: [1, 1]
; {: c8 V7 g: `5 J - }
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- let f = new Face(info);
, ]8 g, m4 w7 b - state.f = f;( v7 |' l! p2 E5 @3 P
- & n: v( g) d% W. f: @; ~
- let t = f.texture;
% \& Q- C) U% k4 K - let g = t.graphics;
: b. q% P" q9 S8 N; Q9 s1 e Q - state.running = true;( @" {6 q2 P( F* R
- let fps = 24;: [/ ` }3 o3 x
- da(g);//绘制底图; O( P& C1 E* I- @- @
- t.upload();, T- ^: C, S4 w
- let k = 0;
5 f$ d% R9 i' I% ^ - let ti = Date.now();! q/ g6 i8 z' j& _6 B: n
- let rt = 0;
) `/ j& h0 F# D' l% W - smooth = (k, v) => {// 平滑变化
( z w4 s* L. A) H% ]+ \; `; ]4 z! F( G - if (v > k) return k;9 {% @" K% s* i0 j( z ~
- if (k < 0) return 0;2 e: R* N( N4 c$ M4 W% U
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;/ P! Z; { j1 S+ i- d" ^
- }* P, |) {) |3 r& B4 a. B! d
- run = () => {// 新线程
: X" z% f- _0 N1 }5 D, P - let id = Thread.currentThread().getId();. D8 L5 H, p3 a9 H' P! Y9 ^- ?0 m( O
- print("Thread start:" + id);3 M& V- F% g% U, R" i
- while (state.running) {0 n4 ?1 A. N$ o0 O- J! t" T
- try {8 \& ?4 u* ?; I0 s9 S
- k += (Date.now() - ti) / 1000 * 0.2;
" T6 b7 k& {8 M, i2 ]2 d! g) v% Y - ti = Date.now();
( ?0 H, G2 A1 C6 ~; a1 Y! S; } - if (k > 1.5) {6 F5 _! V- ]. e: h# a1 P
- k = 0;
! S- t$ L4 _8 y( y9 a; N K - }
$ C6 \4 X# H5 }& T) y' o: [4 L - setComp(g, 1);
?9 X8 J* Z/ b" z - da(g);
2 u1 C+ J1 E+ M - let kk = smooth(1, k);//平滑切换透明度5 Y5 F3 `$ s: t1 r; N
- setComp(g, kk);
* R. {9 a, f6 \+ H! z! I. }" w& C - db(g);
$ ]7 H6 {# U* j, ] - t.upload();
_ K# \* `: B; l7 e* Z$ ] - ctx.setDebugInfo("rt" ,Date.now() - ti);; q& f- z6 H7 a1 ]( b# |
- ctx.setDebugInfo("k", k);
- C7 A7 o7 K2 z& } - ctx.setDebugInfo("sm", kk);; Z* U, |& p9 ^ x* Y- n, I
- rt = Date.now() - ti;- L& z& O4 [" e2 L* U
- Thread.sleep(ck(rt - 1000 / fps));* {+ ?/ ?# ~/ P- T: H
- ctx.setDebugInfo("error", 0)6 E3 c( U% ^' U3 V B+ p
- } catch (e) {4 m9 J M( B' X; E. ~# l. \2 d
- ctx.setDebugInfo("error", e);' e: m6 S* Z+ S4 `8 }% D
- }. H- i7 u. H+ l9 Q: Z0 a
- }5 x! |! k! b, @) |, v
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
& x% d! @7 c" F8 P - th.start();
5 M0 m+ @- {7 h) v P - }
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- function render(ctx, state, entity) {5 L" h6 h6 X/ L7 I
- state.f.tick();1 i* F+ {8 p% v' u1 v: z
- }2 N! J* e* \- {+ ^! d
# `' Q5 D9 J/ Q" O- function dispose(ctx, state, entity) {5 h0 A# I3 B) j5 P0 c
- print("Dispose");' S6 \* m2 s( L8 S, N/ ^
- state.running = false;6 Z$ n: H; U. z3 K
- state.f.close();
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2 r/ Q5 |4 b% e3 Y8 G! u9 ]6 T- function setComp(g, value) {% @4 O8 J$ W0 k
- g.setComposite(AlphaComposite.SrcOver.derive(value));
3 v& m! B" |8 j- t5 B6 z' V - }
复制代码
! U8 w3 c4 N7 s9 g" X1 c) 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。
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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)
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