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. n0 [0 E/ b2 [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。) T+ y4 Y5 K# z9 Z( r+ ^9 A' c
- importPackage (java.lang);
* q8 O* y. t% v6 M: z7 V! O" E/ ?) e - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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W3 V: N8 F0 \0 G6 y( b7 t- function getW(str, font) {; T6 A6 k0 Y) D7 o& @- O
- let frc = Resources.getFontRenderContext();
- a1 e M, F* f# [ - bounds = font.getStringBounds(str, frc);" V* _ }) n0 p% Y# L
- return Math.ceil(bounds.getWidth());+ s+ h: r: a3 A' ~$ m
- }2 i Z9 a, V: O+ }1 B
; L v/ F4 `4 ]& u2 c- da = (g) => {//底图绘制& N. |8 \. z# [/ e
- g.setColor(Color.BLACK);5 J6 k- `2 K' |) j2 D
- g.fillRect(0, 0, 400, 400);
' S( U7 M. Z4 K$ r - }
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- db = (g) => {//上层绘制
5 v% M/ t3 v, d0 `5 _+ B5 I. R - g.setColor(Color.WHITE);# X$ w9 o8 o2 G7 S/ C
- g.fillRect(0, 0, 400, 400);
: F3 h# b* C: y3 m* l. F- P7 v' T - g.setColor(Color.RED);" Q! K! [: H: Y9 s
- g.setFont(font0);
- o$ Z' b0 ]. a6 I# k9 u6 g& ` - let str = "晴纱是男娘";/ C0 u5 h$ z/ z
- let ww = 400;
* J" ]$ J8 M: x. c! m - let w = getW(str, font0);
$ v& R0 l% V6 p9 M" F. ~4 Q+ U. K - g.drawString(str, ww / 2 - w / 2, 200);! b% {6 u' u9 J* [
- }, }; m+ \$ r& r* B q2 V9 A
- 9 x$ R; F2 Y( Q: b
- const mat = new Matrices();
, z+ H( w' z; j; |& P3 V4 ] - mat.translate(0, 0.5, 0);
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+ P5 X7 R9 k" C# T0 ?# C- function create(ctx, state, entity) {
* I* s- I+ k+ n; |/ X - let info = {& [) z5 w# Q8 d; w( D" p' k
- ctx: ctx,
* L$ H( e, V2 F' P% m9 p9 \/ | - isTrain: false,
+ p: L6 {3 [3 Y7 S. f3 \. o - matrices: [mat],
" O- [) X2 f( s, O ^ - texture: [400, 400],. H' q% I S3 c. O* L5 y' G
- model: {# V0 V! A% i* V
- renderType: "light",( |! F7 ~0 ^7 M+ ~* s$ m
- size: [1, 1],- E' a9 C/ d z9 M9 Z2 b3 f( V# J
- uvSize: [1, 1]% n Z6 ^* T# C: |
- }
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- let f = new Face(info);
7 O5 | f7 ~' r. S& d9 N# m$ x* | - state.f = f;
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) O6 x. _/ }/ Q' L4 L0 @1 X- let t = f.texture;$ i% j% b3 {" B! L% n& k g: a
- let g = t.graphics;# v% J, L1 B! Q/ j
- state.running = true;
& @; q/ k/ _* M1 @" n: B - let fps = 24;& \7 |0 C4 h9 m. @ U4 v
- da(g);//绘制底图
& G+ `7 k: B* ?* A/ Q4 e - t.upload();% _; }+ N% S H4 Z1 R9 a
- let k = 0;
1 Y! j8 T8 q9 L/ B+ h8 C3 | - let ti = Date.now();
) k" e$ P {# h- J* o' N - let rt = 0;
+ I: `! e! F o* P - smooth = (k, v) => {// 平滑变化9 f) d. a1 V4 G$ O
- if (v > k) return k;
n' S9 A$ h1 }! \# k0 t8 } - if (k < 0) return 0;
8 i8 x6 @* p( o) P& | - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程( ]! y5 }0 H$ W; [
- let id = Thread.currentThread().getId();9 y( @( t8 j0 N) G% I
- print("Thread start:" + id);
8 y; l8 o" P1 P8 M - while (state.running) {
; v2 {: @+ Y% h - try {; a" x) u7 _; D0 V' n, @
- k += (Date.now() - ti) / 1000 * 0.2;
; q3 ~5 z; [# F" Y* Q - ti = Date.now();
0 e( }" r2 H- A4 m/ Q( C - if (k > 1.5) {
{! R& e0 i9 M( [8 ~ - k = 0;3 I4 }2 ]5 Q y2 Z
- }
T3 B u1 w- G! e& c - setComp(g, 1);
2 e) j/ K) \( z! |$ i - da(g);0 K- }( [! n: M$ p# L
- let kk = smooth(1, k);//平滑切换透明度* E/ s7 J0 | {$ r
- setComp(g, kk);, z0 s9 ]* h6 ~* J
- db(g);0 U( X2 W# ~9 |9 U, S* K3 c
- t.upload();' i( K* G! }1 L4 u
- ctx.setDebugInfo("rt" ,Date.now() - ti);* Z9 {5 `( g0 s( b
- ctx.setDebugInfo("k", k);
1 X; d/ S+ z9 b0 `: X/ T - ctx.setDebugInfo("sm", kk);
( _3 _0 i' }* C+ N - rt = Date.now() - ti;7 `* E1 H# J0 H+ i) S
- Thread.sleep(ck(rt - 1000 / fps));
7 S# k. h; R$ K1 w) ?2 s; H1 | - ctx.setDebugInfo("error", 0)
# d+ [- Y+ k$ N% U4 G8 f' a/ Y - } catch (e) {
! t s! D( [" V: r' z - ctx.setDebugInfo("error", e);' t( [3 x* l) r2 T" j
- }
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- print("Thread end:" + id);; _7 X; z' N. H) Y$ `+ ^
- }
1 E& X( o, T4 {, @ - let th = new Thread(run, "qiehuan");. l9 x: I( Q) l- G3 W6 p, c
- th.start();
5 x. a- j( v; q) u6 R - }1 C" k5 K; G9 S2 u+ V; m) g
5 U! q% w! S/ y, [- function render(ctx, state, entity) {
C* r& u f' \! m& Y+ t - state.f.tick();
7 ?# D$ m& F1 X' U - }
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) e; w" O: r% t2 g( P- function dispose(ctx, state, entity) {
) p+ _4 f! l6 C" [% R - print("Dispose");
& @. N- ?- u U1 c" o( H# k4 z - state.running = false;! ^% F7 V- G* T! L
- state.f.close();
! u u( O8 N4 j# X7 @/ q/ `, o - }
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- function setComp(g, value) {( W2 ^+ I" |- e4 y7 D
- g.setComposite(AlphaComposite.SrcOver.derive(value));& S( q& U1 j! O9 y- `
- }
复制代码
6 ^1 T! h* K' Q0 g4 n, p: F4 Y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)3 ^4 C( k+ G1 [9 k$ w/ f
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