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; n1 @+ I8 O1 S' K+ g$ G8 Z0 D( f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。( t8 f1 ]+ [6 L9 P4 y6 [1 @
- importPackage (java.lang);
0 y2 b7 t5 J( a9 G7 C - importPackage (java.awt);! E* ^$ ]( p3 S" f# a& b
- & \: N8 C8 ~2 R X$ P* C
- include(Resources.id("mtrsteamloco:library/code/face.js"));
; l! I0 q/ v+ n* f3 H
4 Y" v% c. p4 |' B5 x( i- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ w" a k) @, K; f, T( o
7 C; i5 @ o% v3 X# @- function getW(str, font) {
) K6 i2 d1 t$ N+ P, K - let frc = Resources.getFontRenderContext();& F$ t1 f- R" Y2 a
- bounds = font.getStringBounds(str, frc);3 p2 g# l/ }2 O0 h: @, O
- return Math.ceil(bounds.getWidth());9 [ d u2 a+ {
- }
+ m; A+ [6 s8 x. U& r2 I - # B5 @8 C" h d) l
- da = (g) => {//底图绘制
' L9 G& ~7 t; m/ y+ J' p - g.setColor(Color.BLACK);
7 [- { N6 d; `. Z - g.fillRect(0, 0, 400, 400);- n$ b6 {0 U% K B3 j
- }3 p u& ^, H/ [) r& c( E
- - n& N5 v. F3 @' u
- db = (g) => {//上层绘制- V$ J! ^' G' v5 A
- g.setColor(Color.WHITE);
6 |4 F* ]- A3 G, k - g.fillRect(0, 0, 400, 400);
$ M9 Q2 H# t& h - g.setColor(Color.RED);
) `. d; Z0 w' Q! O - g.setFont(font0);
( V2 F7 j6 C, N; u* p - let str = "晴纱是男娘";' D2 x$ e1 s8 b) p1 E) S
- let ww = 400;
8 c$ L- y6 C& L: o4 M - let w = getW(str, font0);& v9 V" k+ L" G! k
- g.drawString(str, ww / 2 - w / 2, 200);
6 R5 l% }3 r$ V' E6 ? - }
' e0 ]; M- }: \* v2 q - 6 B( b3 O9 s3 m$ N
- const mat = new Matrices();
8 K6 p* Y; g! ?2 ]. m+ w% d* p) k0 p - mat.translate(0, 0.5, 0);
: m9 ~. T- }* O1 o+ l3 d - ' j: t# t, A% b7 x2 G2 L% ~8 |, `9 {
- function create(ctx, state, entity) {0 O8 N' W2 c( E$ l& v, h% v& E
- let info = {$ z8 x+ m! R. F+ E
- ctx: ctx,
+ z% ~' ?/ b, K( p" [2 r4 F - isTrain: false,. d1 P2 {- [) I* z
- matrices: [mat],
% S2 E) |5 O8 d9 b - texture: [400, 400],5 E4 q1 u; U) N6 @5 r7 V
- model: {: g& P( g, |* p3 f& G
- renderType: "light",' Z8 S G+ o* d) v. r
- size: [1, 1],* r8 A: P% Y+ ~$ W% E3 l- o4 P( K
- uvSize: [1, 1]& f& `. W+ ^- [# Q; ?3 |: y' O
- } @5 Q2 Q/ a2 U# e
- }& s0 d" b, V$ ^, r9 q& C& F
- let f = new Face(info);) B0 ^1 r. K8 B( T8 y
- state.f = f;
. F" V( Z% j0 h
% X c+ W# y# W; S7 @- let t = f.texture;
0 q) x- {- N; M9 E. I4 V - let g = t.graphics;2 P H$ i0 C% d6 G, e4 n0 J
- state.running = true;) \7 {9 K+ [: r5 [% ~2 x
- let fps = 24;1 y% I+ @' t. L
- da(g);//绘制底图
; Q$ O8 i) v+ i' A1 s" K* c/ C2 ^. K - t.upload();2 w; z7 P- h& [& L- w0 B/ @
- let k = 0;8 S u7 M( R$ J0 Y# q: _
- let ti = Date.now();
9 a: S* Q4 }7 j3 E3 ]& e - let rt = 0;
; ?7 w" @5 F3 p% D6 P! V* U - smooth = (k, v) => {// 平滑变化: o; i f f1 Z( D2 X/ }2 L$ g+ L
- if (v > k) return k;
+ P0 x+ ^* h' I$ K - if (k < 0) return 0;
7 x' T0 X; e7 u9 D! D6 ` - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
. w4 O! q& b* j2 J) w! Y - }
' z% P1 s' a2 A - run = () => {// 新线程
5 f1 w) h/ [% n3 {* y# A - let id = Thread.currentThread().getId();
) Z/ X7 ]5 \4 f H1 P6 ] - print("Thread start:" + id);- Q7 M. I- M3 j0 O0 Q# X. e
- while (state.running) {
7 O$ G- C+ \4 V$ e+ l - try {
7 G. m7 f. E- H% _8 ~ - k += (Date.now() - ti) / 1000 * 0.2;
8 ^5 R; ]) m8 D* B - ti = Date.now();) i1 j$ v+ X. q/ }: P w
- if (k > 1.5) {7 C2 }- g/ [1 c+ R7 O9 N" @! Q- ]! f
- k = 0;' g! S$ m: _- X
- }) ^1 a; z2 }' Z. O
- setComp(g, 1);
3 N" f9 W7 z$ [( i4 p6 K0 ? - da(g);3 l# E- x$ E4 E( l' @3 W2 E1 W: }
- let kk = smooth(1, k);//平滑切换透明度: T f7 m4 F& k9 ?, h9 g; e% n* o5 V
- setComp(g, kk);! [0 F9 Y0 P: o9 H' Y8 c. p% L
- db(g);
% F( E% k' L, Z - t.upload();
' @' T. c( Y/ t' S ^ - ctx.setDebugInfo("rt" ,Date.now() - ti);
% P# q( P% H6 N - ctx.setDebugInfo("k", k);( m, R" ?' b% @1 z. F' d- M
- ctx.setDebugInfo("sm", kk);
8 d* }- Y9 m" q - rt = Date.now() - ti;
$ G7 |4 z. A% Q+ L0 Y' [ - Thread.sleep(ck(rt - 1000 / fps));# P: u' F) d0 k% B3 F; m: K0 ~
- ctx.setDebugInfo("error", 0)& h) }) i( y2 ^/ K1 k6 {8 c0 x
- } catch (e) {
& M- f2 ~1 I+ l B' i - ctx.setDebugInfo("error", e);8 x- q/ W- q' y6 T
- }
1 U+ t0 X( z; F4 Y - }
8 D3 m2 ?7 v# O# `, Q$ R2 \3 Z - print("Thread end:" + id);) s7 a- O- \8 Z& K3 f' J, `0 }
- }
, h. S# k6 B8 K - let th = new Thread(run, "qiehuan");, l4 ~: ~: `2 M1 G$ T
- th.start();
4 i" ~, e- e$ S - }7 R4 P# R- H7 G0 Y4 G% A
- 7 l) c; B5 L1 s6 w2 n) ~* F; o, C- d" H
- function render(ctx, state, entity) {5 I) {3 U" {- A
- state.f.tick();
& F% x6 |( p! W - }
2 j. T7 r5 J, o; ?6 |* o: K4 g8 s
+ ]" N/ C& K, C8 U7 i' d- function dispose(ctx, state, entity) {
, l6 J" ]% z! i/ b, D - print("Dispose");9 b$ ~( q6 [) a4 S
- state.running = false;
" g0 p: I, C2 Z - state.f.close();! h. d5 o+ X3 `: i" k
- }
4 C# }# f7 g" |# }5 c
6 f7 A$ a6 l- }% c- function setComp(g, value) {( M. b- X% ~- E% ^" j9 s
- g.setComposite(AlphaComposite.SrcOver.derive(value));
% O! ~/ v' R3 N$ x - }
复制代码
9 z$ l- n- \1 h+ X: S) a" N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。
$ d X8 L5 ~; n9 {& |& r' P( E. M$ @7 H- D
# ]* C5 ~ J6 V) S" d9 j% ?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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