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3 q, X: A, x; 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。
& K7 g ^0 V7 R! i- importPackage (java.lang); Y7 P& _# G1 F2 w( G
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);0 w# T6 k3 w7 f& Q5 b2 G
- # k- b3 [5 L' P/ R7 H _
- function getW(str, font) {: M- W! s) W ]
- let frc = Resources.getFontRenderContext();
2 R8 O+ {8 g8 q2 ~5 O - bounds = font.getStringBounds(str, frc);3 x# O! \1 e: f; h7 M
- return Math.ceil(bounds.getWidth());
7 F% N! ~0 E6 i, V3 M4 o - }
; U1 v" p+ I" G1 m - " k- R0 v. G9 y! ]
- da = (g) => {//底图绘制+ _; I$ i7 J+ h$ p- }0 n
- g.setColor(Color.BLACK);+ s$ p# `* F, Z8 J. w* u3 R- p2 N
- g.fillRect(0, 0, 400, 400);7 E5 r# X( ~/ \$ k' [6 I% y( W. p
- }
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; U) R: _- ]5 h2 I- db = (g) => {//上层绘制* h& ~6 }& B$ ~. f* ^9 C
- g.setColor(Color.WHITE);
5 f- c$ G% h" Z8 q7 I - g.fillRect(0, 0, 400, 400);
9 Q. g% u, ?/ Z4 v% d - g.setColor(Color.RED);
: W! I& [/ [% ?# K% g - g.setFont(font0);3 `& p- l, z1 _6 J" u' o3 r2 p# Q
- let str = "晴纱是男娘";
4 R+ Z! y! ] [8 K0 Y9 B - let ww = 400;
. Q% U) r% z9 z* P0 F/ E3 K - let w = getW(str, font0);; c F- E% ^" c A' c
- g.drawString(str, ww / 2 - w / 2, 200);0 ?9 s) _) t- V; o2 }- c w# [4 ?, T
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) s% N, r7 N3 M& K- const mat = new Matrices();
. n7 u1 q* c3 z" h - mat.translate(0, 0.5, 0);- n7 t( R, H. h
7 z- m. o' p; V7 J/ s- function create(ctx, state, entity) {* \9 X9 b- m l: J. U& w d
- let info = {0 G |! A4 _/ m! s& a- d
- ctx: ctx,& l) Z) I0 }6 P v8 W5 o0 \
- isTrain: false,
: \* ?- O" g9 S5 z# m- h; h - matrices: [mat],$ w' ?( g; p: X, R
- texture: [400, 400],1 Z$ `; Y! ?4 x. d# T4 U
- model: {9 N+ Q3 G) B$ o4 ~' b, l \% N
- renderType: "light"," m" R2 Y$ s! D1 J6 r j+ s
- size: [1, 1],
8 [5 [- T z( Q& l: H; @7 i - uvSize: [1, 1]* b2 p' ^* D( l) B
- }% v/ U- L1 E9 q6 N" E
- }
' e7 n$ q3 [2 `* v8 u - let f = new Face(info);- `# `1 _0 L. {& k# G
- state.f = f;
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+ k- T! F, U# q+ o5 z' ^- let t = f.texture;( D1 w( H7 q. V
- let g = t.graphics;
, h+ Q( _: |& N9 V - state.running = true;
2 K! C; h6 Z3 p) G6 f+ W - let fps = 24;
9 F5 m: \& P$ G$ y - da(g);//绘制底图
7 [( a5 I/ h$ F5 v. b# t - t.upload();
* @; a8 n6 r) F* `: B; A, A* f, M - let k = 0;: x# b, L9 F; J2 Z
- let ti = Date.now();
$ p* F- S0 |0 W. l - let rt = 0;+ }2 U% h4 j3 U2 O9 b; S7 L
- smooth = (k, v) => {// 平滑变化. \% e( v# r0 Z
- if (v > k) return k;+ Z; o9 b) S, J: i [, P: y
- if (k < 0) return 0;7 q; J% z9 w2 ]: ?7 s. }( d
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;% R9 n+ g3 ` S, G) T; A
- }0 Q% k( V C$ F1 I
- run = () => {// 新线程: D: G6 s* \/ @9 \8 d+ R
- let id = Thread.currentThread().getId();
8 _+ o% E2 Z7 r# a. K1 T - print("Thread start:" + id);
( L/ X5 {2 F# r- J - while (state.running) {
$ s" E) i: x: S& T - try {' X+ O3 y3 u0 v) W
- k += (Date.now() - ti) / 1000 * 0.2;
' X. v4 O/ }& K. [: c% f - ti = Date.now();
; _: _1 j& z" c; V" L* K) V& y! I - if (k > 1.5) {0 @% P* U6 M) R3 S: Y% s/ z |
- k = 0;5 x# L9 k0 P0 E s4 T- S
- }
3 _1 v7 n8 M3 ~3 R2 w7 h - setComp(g, 1);2 G- g( P! p- j3 |4 E2 t8 d% H
- da(g);
& H" c5 r% ~: Z' q9 _& S3 \ - let kk = smooth(1, k);//平滑切换透明度5 N V3 ^* x) v5 g3 F
- setComp(g, kk);
0 z. o; r$ u( X G$ M" Y% }5 o" Y/ U - db(g);
1 Y! H/ I; d" o4 U- v6 R - t.upload();
9 N; F* D8 N- S, I6 R! k. V - ctx.setDebugInfo("rt" ,Date.now() - ti);2 X" F* T; A' b4 \
- ctx.setDebugInfo("k", k);5 C4 H/ V6 J i9 y2 M& K. j
- ctx.setDebugInfo("sm", kk);. s1 d( r5 j, `2 _ a! g
- rt = Date.now() - ti;
8 w) ^4 D( `6 E2 g5 c - Thread.sleep(ck(rt - 1000 / fps));* n- q& Q* V$ ]/ C. ^7 m# V: v( I4 K
- ctx.setDebugInfo("error", 0)
8 D; P1 r. Q9 \+ ], a! M1 \ - } catch (e) {
q, d0 ~, @2 Y% X6 ^. \9 j2 A - ctx.setDebugInfo("error", e);
7 s2 [+ y# U9 J7 I9 A! m- R - }
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- print("Thread end:" + id);' F2 f5 C+ A9 f; T n* _, M/ L: I
- }
4 e7 V8 l9 _3 L- z- Z* w* [ J: V - let th = new Thread(run, "qiehuan");% S8 K6 x) Y9 M% _/ v9 W: s3 x
- th.start();" G3 q. A2 V3 T' G
- }
$ a4 R* w- O; m3 O f" Q+ {
. o9 H; r; z( k. w$ Q8 Q' \9 z- function render(ctx, state, entity) {
6 }7 X) ^. T* r - state.f.tick();
" i4 V: T' D7 j4 A; p - }
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- function dispose(ctx, state, entity) {
; g( B3 s2 T4 I8 j - print("Dispose");
$ p+ V, H$ e/ L9 w! @1 ` - state.running = false;1 A5 m s6 p& u" w* U
- state.f.close();
7 o$ `! P" D$ T6 ?4 u- W; }2 @ - }
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, z" g" {" F5 P2 E2 C- function setComp(g, value) {
4 @9 D' T5 h! v: ]6 c - g.setComposite(AlphaComposite.SrcOver.derive(value));
3 @; a, \$ S, d6 Y. n9 }' i1 K: ]( _ - }
复制代码 ) A! C( U* W0 G5 F' ~3 D; t( M" 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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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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