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9 t4 o% i s2 ]# k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。/ x6 m6 j% \$ E4 x7 K
- importPackage (java.lang);
+ p3 c# H* r S3 p - importPackage (java.awt);
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; ^5 X u8 n V/ h$ ^- include(Resources.id("mtrsteamloco:library/code/face.js"));" |1 R2 ]1 ^6 `: ]- R1 t
- * g4 r; C; g3 h0 q; b
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);$ M* i! M1 }, K/ e
4 w. s& f C' ?8 M- function getW(str, font) {
4 A8 d2 G, @4 { - let frc = Resources.getFontRenderContext();$ C/ d; F6 Z" V, S6 _' l
- bounds = font.getStringBounds(str, frc);4 \3 L% S) ]% b0 s( e$ u# @
- return Math.ceil(bounds.getWidth());
/ W% |& g/ a k9 @ - }
$ U; J+ W6 p1 \% A
/ r0 w7 ~. a+ u- da = (g) => {//底图绘制
+ U& g1 i8 G9 X$ I; f* p - g.setColor(Color.BLACK);. O" ]% ]9 r& `- ~! j
- g.fillRect(0, 0, 400, 400);
. E8 }& [6 R4 E- O N" E - }" h: a- n3 w+ ?! N, S& Y
- + T. a$ l1 S: _/ f9 x8 s
- db = (g) => {//上层绘制# `# o' r- k- l; }
- g.setColor(Color.WHITE);
/ Z n, S( O c: o( `( x - g.fillRect(0, 0, 400, 400);
+ Z0 f2 S2 M; ^1 b. x( z - g.setColor(Color.RED);
. H6 e$ f2 E; h. M0 J& B - g.setFont(font0);
& L) l* p" X' E& B. X' k2 y, o - let str = "晴纱是男娘";
8 p f5 C! \5 G+ j - let ww = 400;
B5 w" D; v& i9 P3 g1 V - let w = getW(str, font0);3 b) k4 `- T1 M' E2 j
- g.drawString(str, ww / 2 - w / 2, 200);
0 F) |+ G4 i* D - }
3 D" a: J$ d! q" H) M - $ ~2 y8 I0 A8 U" m8 H( ^
- const mat = new Matrices();) Q* n j% {* J7 E0 m2 a, C
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
0 T6 } n5 \% a1 |; U$ W. R - let info = {
8 z; f7 h+ L5 |: u, d - ctx: ctx,' z- m3 Q1 B) W# }
- isTrain: false,/ v1 k% _' W8 f$ C" U% F
- matrices: [mat],
" k# v% {1 k1 s* l# D7 C: O4 R - texture: [400, 400],
- D8 j8 U- i/ x* ~6 \ - model: {
. F( O2 R1 V( L0 A - renderType: "light",
2 g0 M5 g" d+ q4 K$ q8 D - size: [1, 1],
9 x: \) F. ^$ R H4 w - uvSize: [1, 1]* Z) ?8 S6 @: e" Z' W+ Q- @
- }
2 C {7 E1 r6 r% {+ b" G( A - }
6 I2 {+ j2 @4 C4 z" J b/ J! p - let f = new Face(info);3 w5 | O& B6 y- C
- state.f = f;
x! h3 D4 P% `3 [7 V7 q8 |
. \+ f, v# k% |- let t = f.texture;
+ {7 H/ p+ ~" \0 Z7 M0 ` - let g = t.graphics;
6 _, W+ X1 K& p( j# N7 z - state.running = true;
7 k1 f" P# ~& Y1 T$ g. r8 m - let fps = 24;
4 ?5 h0 a; U! D - da(g);//绘制底图
. O0 y+ Z8 P& {4 R+ D F- Y6 L2 u - t.upload();
: Q7 W. N1 c9 D! {! z - let k = 0;
2 o4 V5 o8 Y) I5 J4 C! a - let ti = Date.now();
" r6 F! d1 F9 z. c. c" Z - let rt = 0;
+ i3 N# \& u L8 L- D7 K - smooth = (k, v) => {// 平滑变化4 Y0 t7 ]% w: l. E. i! d
- if (v > k) return k;3 }3 C" h. r7 {- O
- if (k < 0) return 0;* I7 p+ [1 T5 p- X9 ~5 V/ k
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
& D5 U* P i6 m - }% r( k& N% R7 j; t1 R
- run = () => {// 新线程
* v" Z) E ~: k9 v3 W4 r" ]9 K# D - let id = Thread.currentThread().getId();
4 z, A- e2 [# i) |0 r; X - print("Thread start:" + id);
- D. u2 `; u+ i. n) S0 F9 @ - while (state.running) {6 a7 s7 p) Z' H ?+ L4 O
- try {" r: u8 z) Q( Y- Y1 g+ E: d4 t: q
- k += (Date.now() - ti) / 1000 * 0.2;: w$ k0 B6 u2 x. f
- ti = Date.now();5 {4 G8 R5 W1 U( q
- if (k > 1.5) {8 V2 C$ V$ w+ C6 D5 t* s
- k = 0;
3 X( S S7 [0 f( O1 {- ~ - }
w% ~6 V$ K1 N- T - setComp(g, 1);
, [! g9 t' H4 _+ u - da(g);# \- x' ?0 ~4 Q7 l
- let kk = smooth(1, k);//平滑切换透明度5 P+ o% f/ X% }7 U
- setComp(g, kk);
; f5 J1 ?' M% b; W - db(g);- b' O0 _0 \# I% u+ X
- t.upload();
, ~, D4 I: L/ E+ W9 N - ctx.setDebugInfo("rt" ,Date.now() - ti);
/ V6 t, b+ h+ F& W - ctx.setDebugInfo("k", k);
! O! q' [0 d$ E6 }# {- c# S! M - ctx.setDebugInfo("sm", kk);" N; O6 O2 y6 N; F
- rt = Date.now() - ti;
" B( ?, c9 z& S( } - Thread.sleep(ck(rt - 1000 / fps));3 g6 |; L8 x/ D; W% L8 O
- ctx.setDebugInfo("error", 0)
; O5 G( R/ R6 ~$ b% X0 _ - } catch (e) {
0 E4 W) M( p6 [2 ^$ a5 `% z - ctx.setDebugInfo("error", e);
$ X. A% I7 q! e" y0 f& ` - }
3 G: M' J+ W B5 s - }
8 o$ g. A% j1 g- A t - print("Thread end:" + id);5 }# q! @0 `/ @3 t
- }3 Z% H6 C& h* s+ P2 n
- let th = new Thread(run, "qiehuan");* ~; ] Y, r6 o3 T8 `7 c
- th.start();
; ?2 _+ y& i f - }
3 M1 O6 ~8 j7 ~" b2 p - 5 M) E, _$ L$ v4 E9 j
- function render(ctx, state, entity) {
: C7 f. ], ]6 s' i t2 z1 { - state.f.tick();
4 Y- `. q- t' ~1 T0 X - }, ?* V5 q Z( k* R& A7 X$ ]
- ~' Z, o; V2 O( w
- function dispose(ctx, state, entity) {
0 H% o0 K9 Q3 y+ y: x - print("Dispose");
1 C" j3 e" M6 |3 V - state.running = false;
4 G, n/ Z; S Z3 n+ U; M v3 ~ - state.f.close();
! Q5 Z4 j6 _; Q - }+ D% _. {7 \' \: r; w W
6 D1 l' G; S, R$ l c% \6 ?- B- function setComp(g, value) {4 D* l O( d$ _/ {, ^( S$ m( I
- g.setComposite(AlphaComposite.SrcOver.derive(value));7 J1 m& Z2 ~8 _7 s% t4 G% q
- }
复制代码 0 }4 I9 w5 h2 r! E: {9 m
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。/ p4 g8 C# L! [
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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)% F, S0 L% y4 i6 P! z9 q8 h
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