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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。
& [6 t1 o) D7 v- importPackage (java.lang);( p$ o- s4 m1 u+ ]- x- p) P
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));+ s* T$ g8 l9 q
- 6 M4 E/ h. u: O" M; |- c, W
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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( g3 _$ L3 \5 P- function getW(str, font) {/ F9 D/ r% H8 D' o }+ H
- let frc = Resources.getFontRenderContext();
5 G( g: a. O3 }- Y# a - bounds = font.getStringBounds(str, frc);
7 j1 }( m6 c1 e! G - return Math.ceil(bounds.getWidth());( N6 s! M) c/ T
- }
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- da = (g) => {//底图绘制; s- T, u' j7 }/ |2 e, G
- g.setColor(Color.BLACK);! e% J# H* a/ G
- g.fillRect(0, 0, 400, 400);
8 m2 e: k4 X: k( s8 L7 ^ - }
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3 W& b4 M2 I2 _/ Y% N' L- db = (g) => {//上层绘制9 Z/ j/ b" h v9 b) a: h$ f$ G
- g.setColor(Color.WHITE);2 z Y% [$ q7 c l
- g.fillRect(0, 0, 400, 400);( G) `. A$ E6 g$ _( r1 ?" @2 Q
- g.setColor(Color.RED);
$ L+ ^) d& C2 W/ `& i7 z3 V: T) T - g.setFont(font0);: ]' E+ i: U/ u7 a
- let str = "晴纱是男娘";
) L9 g2 N6 Y, v8 ^$ j# U - let ww = 400;
! n( @9 P9 x c. |9 U6 n. I1 J - let w = getW(str, font0);0 J5 m! v# C+ ]0 d1 w: f
- g.drawString(str, ww / 2 - w / 2, 200); h6 ^9 ^* U7 {9 n
- }
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; p7 \! c M3 P: N7 I$ q- const mat = new Matrices();
6 U; [( q. c# {. ]: O - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
7 I X, D) y* m/ s* h; l - let info = {
* P" C& S- ?- m. C/ P - ctx: ctx,5 ]- S/ l1 C1 x* p C& D' e6 W: p9 Y
- isTrain: false,$ ?1 }9 J( `" l" Q8 X3 `8 {% k
- matrices: [mat],
8 K% I/ z1 i: A- N0 H! r - texture: [400, 400],) e7 m- P0 T. c2 P; d$ `1 b
- model: {
9 Q2 O/ F5 h% ?1 c# r$ J& F) ^. B h- K - renderType: "light",
4 U5 }+ V% z$ x- [9 D- L9 ` - size: [1, 1],. a. P0 x/ T0 I7 T1 G+ k
- uvSize: [1, 1]$ i8 i1 F ~; w3 p) I# `* y
- }
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- let f = new Face(info);
% c% R w# {% i/ s - state.f = f;4 l( [/ q; v [2 `% u, W
v5 `# x; }- y% f' \) N- let t = f.texture;, ^7 _+ s1 k0 T2 m- y* ~
- let g = t.graphics;
- d# a3 c7 \1 f i - state.running = true;
+ x% |! B* ^$ y# c. Z - let fps = 24; I4 L V8 L% p7 e( t) X1 O
- da(g);//绘制底图2 b- e1 e2 g+ @
- t.upload();
& s* C( q1 w& o' H0 w - let k = 0;2 V; k; D7 A3 W% u; a
- let ti = Date.now();
o7 H* {% N4 \6 Q/ b+ V9 C - let rt = 0;
9 h [8 g4 z2 Z: G* M - smooth = (k, v) => {// 平滑变化
) v5 i( y+ ^8 r" r& E; { - if (v > k) return k;" J6 n2 ?2 _- g }% H0 u
- if (k < 0) return 0;2 G" ^4 |, u2 Q# T
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;& K8 q' s* x7 I; k" A8 J
- }
$ ~- o) p# _2 V3 ]1 C - run = () => {// 新线程" W" Q2 I) V: H# k+ v* U) U6 m& i
- let id = Thread.currentThread().getId();
. V1 Q0 F3 V5 w( [# W - print("Thread start:" + id);
+ k* O8 P- M' T) f9 p - while (state.running) {0 {3 v, J' I' p4 w4 ~
- try {
: t4 w0 e: _0 L l8 N7 F3 i" r - k += (Date.now() - ti) / 1000 * 0.2;
8 N6 s0 o# d# F! V% N% n2 C r) w - ti = Date.now();
" K! j% X. W, m& E0 P) Y7 e - if (k > 1.5) {# b# o/ F: E- S; K6 d
- k = 0;" [' E7 t9 {* p* i9 N; e3 I
- }
$ h [ Z1 g. v - setComp(g, 1);/ b- P6 h- X) X. H$ A: ^3 h
- da(g);
) Z) x- P# ?. T. O4 m) c - let kk = smooth(1, k);//平滑切换透明度% B$ [- R7 X- I8 x9 Z* ?1 J5 O
- setComp(g, kk);3 @6 [- e9 _8 ~4 G. G% D; _
- db(g);4 w; x* Z! p2 v+ p' x% X
- t.upload();
% C$ q- ?- ]; f5 M - ctx.setDebugInfo("rt" ,Date.now() - ti);6 w1 n3 q0 }$ S
- ctx.setDebugInfo("k", k);6 S1 S- E2 D J& V) @ F M4 P
- ctx.setDebugInfo("sm", kk);1 l; o7 G2 G5 }2 h$ A1 _0 T5 i8 ~# A
- rt = Date.now() - ti;
1 B' v8 e9 T* M m$ H6 [ - Thread.sleep(ck(rt - 1000 / fps));2 B$ c2 R5 z% U
- ctx.setDebugInfo("error", 0)
! |3 F6 E0 A2 l9 o3 j* G, o! Y* H - } catch (e) {
9 Z4 F8 L1 f% H3 ^# }$ _ - ctx.setDebugInfo("error", e);
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- print("Thread end:" + id);7 D9 I5 b4 W+ R* u) \, `
- }
) _' G# r2 M/ { - let th = new Thread(run, "qiehuan");( K) |* `; @' n6 ~- g1 Z
- th.start();
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! M( g/ H1 C! s+ D8 [( D/ M- function render(ctx, state, entity) {& Y9 M9 ^1 u2 e( O3 C/ C" j
- state.f.tick();4 F' m% x4 u8 r. A2 |0 t, \2 f
- }
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- function dispose(ctx, state, entity) {# @. ^9 B) r" Q+ g
- print("Dispose");
7 `% }% K# D) J. d& x" e P - state.running = false;
$ o* W$ W/ @2 l& t; u4 s - state.f.close();# _% a) q2 s0 E% @5 V+ N2 n
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- 8 Y g* I, u' \. m& f
- function setComp(g, value) {
: y8 T8 T' w/ i; p - g.setComposite(AlphaComposite.SrcOver.derive(value));
$ Z8 [& ~* V% P# R0 N - }
复制代码
9 _0 B/ I' V& G) B0 u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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, f- Z6 @/ K0 f; m" y' c1 r" @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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