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7 @3 }5 Y5 E8 z. [ Z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。
( L4 }" F% \$ E- importPackage (java.lang);
3 `- h+ k: @! R. B, J" V - importPackage (java.awt);' ^5 b. p4 G- W. H
# R$ D- Z. |& \8 }2 ^; N- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, C4 }9 ?, |$ |, V' I! r6 ]1 H% Z
- % Q6 H% E W% h' t! j( P
- function getW(str, font) {2 c5 h9 c( `6 f- o' K* n
- let frc = Resources.getFontRenderContext();
u& }, F) w7 x& {# U - bounds = font.getStringBounds(str, frc);/ a" R$ c. r9 v5 C4 i/ V
- return Math.ceil(bounds.getWidth());5 V& P# S. Y% t3 W7 T d
- }" v1 [: I" J; |' G! T, f4 g
% `0 B9 ]) d* M" h- da = (g) => {//底图绘制
) z) e& H/ y. F - g.setColor(Color.BLACK);( _2 I ^+ C7 m2 ]7 ~
- g.fillRect(0, 0, 400, 400);
, J) a9 ^' E+ L9 G6 o. f& x - }
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- db = (g) => {//上层绘制
" f& W d& w1 Z; ?7 f5 y - g.setColor(Color.WHITE);/ G" z. a0 N0 I5 C$ p& B2 W: ^1 W
- g.fillRect(0, 0, 400, 400);6 `* q/ L4 F! L5 q! `' q
- g.setColor(Color.RED);9 D( k3 V, f' m3 L5 W2 e
- g.setFont(font0);5 W) p6 P) B% T
- let str = "晴纱是男娘";' m M+ M8 }0 a& T& m) L6 ~
- let ww = 400;
8 z( O' S8 N: K2 k! _5 ]& ]! P; i% f - let w = getW(str, font0);: I; C/ v/ J' ^
- g.drawString(str, ww / 2 - w / 2, 200);
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& w, x2 \- x6 X" T0 W- const mat = new Matrices();3 J4 K3 s$ p! o* E
- mat.translate(0, 0.5, 0);& I9 w* E; O- m- b* ?6 v9 _/ L9 c
( Z) l' K2 a" ~" k8 w. C- function create(ctx, state, entity) {7 z% x3 P- L& R& G
- let info = {
+ p( ]5 K3 D; W/ B& j - ctx: ctx,
3 R' l/ y8 [! O* n* i& u! A - isTrain: false,) n. {: V+ F- z& H- k
- matrices: [mat],
) {" ]: k; X6 I5 c8 l7 ~3 k- D$ D. H - texture: [400, 400],
! Q- ^1 i$ k( r! Z/ M; M$ o( @ - model: {9 t' ~: [! T# _/ o3 r8 D3 {9 C
- renderType: "light",* B6 }; ?) F; N4 v
- size: [1, 1],+ |4 X) y& E8 B9 c0 i; p2 t
- uvSize: [1, 1]; i. R5 @0 \$ o; F1 Q# {0 z% Z
- }
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- let f = new Face(info);
/ u$ m+ r; _" V - state.f = f;6 j9 h2 U$ Y* R$ _( K! c
- - X) ]1 D l3 g) x5 \' Y
- let t = f.texture;
) }: m- J ^2 W U% \ - let g = t.graphics;
9 R8 _: q! s4 A' m9 k - state.running = true;
) r! M% i7 l ?% g) F1 F1 i - let fps = 24;
2 D; P& R9 u# ^* T - da(g);//绘制底图
/ A/ c% ^7 _6 R4 B- J6 M1 b% W - t.upload();
0 m% |, `; Z6 s. T" f - let k = 0;# D5 N) Z' \, c) B
- let ti = Date.now();
1 A2 A; a h( b5 E4 Z' y - let rt = 0;2 C* W" u$ M& N% P- l
- smooth = (k, v) => {// 平滑变化
# R3 \9 \$ [5 u& N: f0 H1 E; H - if (v > k) return k; }4 {, _1 \1 S8 n: O
- if (k < 0) return 0;2 ~0 i# h8 M% x7 S( H7 `2 Z% b0 e& u
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
5 {- ^7 @4 A/ i {. I - }
0 H' o. p3 i7 N4 H1 T% J% a2 V* d" Y - run = () => {// 新线程
% w: ~/ H6 t" Q/ e - let id = Thread.currentThread().getId(); ]" T) v) R. @0 e
- print("Thread start:" + id);( ?+ l% s( [6 V0 a- N6 x
- while (state.running) {1 r8 C- v8 F/ f. W# }
- try {; T" D/ H/ h2 a
- k += (Date.now() - ti) / 1000 * 0.2;+ Y2 }7 |6 e0 w- K- n$ N( o! j
- ti = Date.now();4 w4 W8 }& J- l9 a+ I5 l3 y
- if (k > 1.5) {& `/ O" ~- d8 s7 r( C) G
- k = 0;8 g2 q# h0 Z9 }) x5 }9 R7 l
- }# ? e5 i4 u6 E+ s- U1 X) a' x
- setComp(g, 1);% p, `, a4 W6 ~! l3 Y8 w
- da(g);$ b' I: U. e0 Z5 [3 |
- let kk = smooth(1, k);//平滑切换透明度
* D. J1 `* e- B' H+ A3 H! z - setComp(g, kk);
" z+ j% ]4 g* r; |. K - db(g); W% D% F% [, U6 a Z
- t.upload();
+ R3 d2 x; g+ e) M( u9 J2 X( ?- r - ctx.setDebugInfo("rt" ,Date.now() - ti); i: C# A4 r" l1 x# L9 F( t
- ctx.setDebugInfo("k", k);- D0 y! n7 O8 P. L) A1 O
- ctx.setDebugInfo("sm", kk);( U8 i* G0 @ D7 x1 \& E
- rt = Date.now() - ti;
% m; J- D( a8 o - Thread.sleep(ck(rt - 1000 / fps));
4 f t! z% Q5 N( r - ctx.setDebugInfo("error", 0)- k/ W, S( j% k* }. b+ E
- } catch (e) {
: P" y0 b. |5 L4 I: W0 _" X* p - ctx.setDebugInfo("error", e);
1 j" g4 f# c0 Q: i9 M5 h - }
! ~8 C: c* i p o1 d - }
4 \2 Z. A; J0 S ] - print("Thread end:" + id);
& N7 G( Q$ O+ M! l6 B - }
q0 R4 p! t4 C' l2 P* H+ ? - let th = new Thread(run, "qiehuan");
) D$ T3 w6 L& h/ L6 n - th.start();
7 }1 o3 v5 o5 {3 K6 S# M3 h - }
. I- h% d# D9 p, Q
3 H$ R7 ?' }9 C1 U" {- function render(ctx, state, entity) {
4 ?7 e' o- u/ E8 ?7 f% @! N - state.f.tick();
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g Y; h* D( E- function dispose(ctx, state, entity) {/ k7 _# o1 _& E7 H9 V2 z
- print("Dispose");
& M F' h3 u4 T( C - state.running = false;! |' S# a) D* L5 W9 Y
- state.f.close();; S9 B& V, O- U3 b. R* D
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- 5 T0 X/ B6 R4 U. S# @% J
- function setComp(g, value) {
+ |9 [6 H* J) U: i' X4 ` - g.setComposite(AlphaComposite.SrcOver.derive(value));
' i5 M% S) `8 {" [- y* q2 G - }
复制代码
1 W" [8 D$ V( o/ v/ {+ Q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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# M' [; M4 q: l. W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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