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; z/ S8 R( q8 S+ V% \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。
" {; _+ [# i1 h# A0 X& r2 m- importPackage (java.lang);
$ g( h1 |' u" u2 @ - importPackage (java.awt);) b% j1 V7 x+ y6 [8 ^
- ; i% }* | I5 h3 p8 v2 x9 Z# G' x
- include(Resources.id("mtrsteamloco:library/code/face.js"));
8 ]' c E% }. Q6 t! `& m @ - 4 p: C) G9 `" D, L% H+ j/ V( Q( s
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( G" U) Y" G G8 i% e6 b0 L* D
- 1 O7 Y0 o5 B) C9 L; [3 h0 Y1 V+ e
- function getW(str, font) {
9 [% Z% u! v6 e9 d+ j - let frc = Resources.getFontRenderContext();
; X8 x1 h l4 |" O* M7 d - bounds = font.getStringBounds(str, frc);1 P# M: f) ~3 j+ Q7 _2 c' x
- return Math.ceil(bounds.getWidth());+ L4 V3 J9 t* }! X" n" ]: l
- }: ^ G! B, x+ Y( N9 p
- z8 _' m) @3 s/ s j8 a+ S
- da = (g) => {//底图绘制
8 x9 I3 v2 {) k$ f$ M0 u - g.setColor(Color.BLACK);
8 W6 }) z7 w0 {( A - g.fillRect(0, 0, 400, 400);8 i @: x6 X! J
- }
; Q+ B h E7 ~6 Q+ Z% ?. Q
+ ^! C$ A }' b2 t& o% ^- db = (g) => {//上层绘制( [2 l6 A# C% [& Q2 ?
- g.setColor(Color.WHITE);* A7 z" u7 f+ W- x
- g.fillRect(0, 0, 400, 400);0 k+ V/ r0 w8 b) p4 v2 ^/ w
- g.setColor(Color.RED);0 E' s/ l4 p- ~ Y1 u
- g.setFont(font0);; I/ k. `+ k1 n: z$ K4 v
- let str = "晴纱是男娘";& [/ [$ \* z& ]0 ^2 ~6 h- @
- let ww = 400;
; {6 i z3 e& B0 b# g - let w = getW(str, font0);
$ v* S! D" X2 D( ^5 T - g.drawString(str, ww / 2 - w / 2, 200);/ ~' c0 w5 G' J' {: J( b
- }8 H" F) W4 T f9 |9 e
2 m+ Q6 S& c9 A( C- const mat = new Matrices();9 f1 P+ j" ^ D
- mat.translate(0, 0.5, 0);- @$ D7 z8 b6 ?
9 S& d3 Q5 ]- L2 @' g- function create(ctx, state, entity) {
7 s2 v3 k; u6 J - let info = {
+ I; v* ^1 O R% R' a' ` - ctx: ctx," }6 i! i+ y& X' R; W
- isTrain: false,0 g0 o+ L+ y3 y9 q4 i
- matrices: [mat],
5 V$ g5 |- d# |' @+ Z6 _' B4 | - texture: [400, 400],
& S( h( m d1 }. v5 b( O - model: {& j% V) S+ f$ C; t) t! L
- renderType: "light",( ?9 m0 P6 U% j: V
- size: [1, 1],
9 }% T, p; t$ M4 }1 T8 V - uvSize: [1, 1]
9 }5 E J7 S- k' j - }3 \0 ]! S M" `$ h
- }9 Y' d2 S& J' T7 O
- let f = new Face(info);
% A# Y9 Z$ a8 U3 \1 `, ` - state.f = f;( x( d/ s4 t$ J% O+ S
2 V T! n7 V6 m3 T5 ]5 B2 W- let t = f.texture;
$ |7 |; `6 N, Z4 C# R2 B" x - let g = t.graphics;2 t0 a% n) C8 h/ C" I5 p
- state.running = true;
$ {6 J: [2 T# k. N2 f$ d# ^' { - let fps = 24;9 ^; I& z5 X4 M) n4 A1 J
- da(g);//绘制底图
, t0 D; D7 F* V - t.upload();
4 d2 W" G) Q/ a H: ] - let k = 0;+ K4 f! R; p$ Z8 e" a8 A
- let ti = Date.now();
2 V$ r: Z6 p- ~3 N5 U3 Y/ x# ^ - let rt = 0;* T5 X2 n0 T) S0 C& }5 X
- smooth = (k, v) => {// 平滑变化
@7 F/ P+ K9 N) a% c8 i0 u7 x - if (v > k) return k;* O5 c& C9 l( W; Q( Z
- if (k < 0) return 0;
% c7 R5 Q* f- |: b1 x, ^4 [ u - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;8 s( l1 g, X/ `( Q8 h( n; G
- }
, o% p1 m3 E! a$ U9 \) o) p - run = () => {// 新线程# W9 \* e7 L; x
- let id = Thread.currentThread().getId();$ Q, q. ?7 h& b* ~. l8 g& {0 w& j
- print("Thread start:" + id); D6 x& K9 D7 a7 K: a7 Q
- while (state.running) {
* B- U s ^4 E$ U5 \* c3 z - try {. R! T5 p' t7 N' H
- k += (Date.now() - ti) / 1000 * 0.2;
4 O5 {) j. Y, O3 g" ]$ g( T! Q' X0 @ - ti = Date.now();
% F# m: Y+ L8 a& M* S/ V/ f% ^ - if (k > 1.5) {
, \5 G0 T2 c4 M O - k = 0;
8 Y W- M N; J/ H4 { - }$ A6 w. b9 ^7 f7 h L C
- setComp(g, 1);/ k+ t4 m, |0 {4 ~
- da(g);7 g7 j3 V7 H; o5 L" t2 E
- let kk = smooth(1, k);//平滑切换透明度$ \/ t' k# T" l R5 V
- setComp(g, kk);2 F2 I4 q3 M% n) }- `2 Q
- db(g);1 [# R- ^6 U, [0 d4 Z, P
- t.upload();
% L3 H$ W7 E: O' G6 r - ctx.setDebugInfo("rt" ,Date.now() - ti);
& r& r: X5 i! [) Y/ Y - ctx.setDebugInfo("k", k);$ z2 D/ J4 ^3 v. c5 ^1 n, m
- ctx.setDebugInfo("sm", kk);0 Q; C# k: u. O; C8 \
- rt = Date.now() - ti;/ O' [( M, K/ a" M: ?; m
- Thread.sleep(ck(rt - 1000 / fps));
) ?0 \: h% K; f( U$ K, T - ctx.setDebugInfo("error", 0)1 b) I ^9 h- b
- } catch (e) {+ t8 J5 }: K" Q3 a
- ctx.setDebugInfo("error", e);
, k/ Z. g; p+ C: x ^7 ] - }
3 l/ ?$ \; ^8 d* G - }2 z0 B. O$ W7 W, l, A; L
- print("Thread end:" + id);
+ C4 y M+ P, y6 |4 ], ? - }
! V g# E* h9 f" F- }7 C' F - let th = new Thread(run, "qiehuan");$ \, z4 p6 D9 d6 Z; [ G* B+ ], g
- th.start();; n/ R- j; j; t$ j! ]
- }
9 a% |( R& O3 ^0 B0 w o6 i
# f+ {0 f# O: I2 w5 K B/ U* f9 P- function render(ctx, state, entity) {
1 P) B7 A( X# Z$ c - state.f.tick();
9 F# ]& K& q w) }* m& \ - }
, b( X) e( [0 T0 l, ?
! `! `, Q" B" n; e7 t R H- function dispose(ctx, state, entity) {
( g/ u! s" E6 @2 d5 z O T" ~ - print("Dispose");
" {/ r6 R6 `) V/ y6 l e4 R& A - state.running = false;
( q8 ~9 [& w* ^4 U! E2 A% s - state.f.close();
) P- ?7 x4 B3 ~7 w5 M ] - }
+ _& ~! n$ a2 m r# o3 t - 5 I' e$ O$ `& N3 z4 t
- function setComp(g, value) {% r/ `* S5 ?- U7 ? H
- g.setComposite(AlphaComposite.SrcOver.derive(value));
! J4 s9 p5 K$ O$ S - }
复制代码 ' `5 s5 n1 e: ~8 j0 E7 K
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。
* _& h3 Z s2 h' q- \( z- a' \# }$ ?& o* T H3 ]! {
& R/ [6 o4 U! g' p. @顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)# }+ k6 Z$ P( Y5 h, X% i
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