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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。
, W2 Z2 C1 L! x0 y$ f0 {- importPackage (java.lang);9 q. W* D3 R4 u1 }; s' p2 R; H+ z0 ^
- importPackage (java.awt);/ v* N3 ^( I0 l& r2 z/ \( z( B
- 2 ~% S/ ?9 P( a2 y3 R6 B
- include(Resources.id("mtrsteamloco:library/code/face.js"));1 w1 W- e; G# Z, s0 P; z+ C
: A7 `8 v3 A% C0 H) ^5 D2 q* K5 k, u- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);% C ~1 {1 ]/ R# f$ P5 z; }
- 7 @! w# s, w" } l
- function getW(str, font) {( G) a; R( }4 b- c& d
- let frc = Resources.getFontRenderContext();( S6 ^" I, r1 M$ T5 p$ \" ~
- bounds = font.getStringBounds(str, frc);
a* o: N4 S% X" }0 h - return Math.ceil(bounds.getWidth());
! M: @+ j: d" |9 t7 \, r: u - }
' J' H K* ^7 a
2 }% N% U. n1 n. {" c- da = (g) => {//底图绘制
- q2 j$ [; z+ P0 |: h- r - g.setColor(Color.BLACK);2 f4 [0 w0 _7 G1 j
- g.fillRect(0, 0, 400, 400);* |3 a/ x- p) ]. o& R3 m C
- }
( {! {7 @& M. I) w7 ?3 d) F0 A - . m9 x, [/ O3 c5 ~7 |
- db = (g) => {//上层绘制& \4 n, K0 D) ?/ O( W
- g.setColor(Color.WHITE);% n; r8 T2 A1 G* h- g* u
- g.fillRect(0, 0, 400, 400);4 }" H9 L l! P8 c4 q$ H. l
- g.setColor(Color.RED);
6 x9 j4 m& @. w4 F: \) x - g.setFont(font0);
8 y* _! C0 P3 l- e; s, f - let str = "晴纱是男娘";5 y# }+ _* w4 }
- let ww = 400;
* d& |0 v5 L o: w3 R a' a - let w = getW(str, font0);
7 @ s9 _, n4 Z - g.drawString(str, ww / 2 - w / 2, 200); o& ` ]3 d4 U2 Q5 x3 C
- }) H! o) w: ^7 t
' U! r, f' H6 L# f. v& i- const mat = new Matrices();* E1 G y ?) L* P" z8 R2 q
- mat.translate(0, 0.5, 0);/ Q$ }1 B# E: Q9 a6 j% e2 ~) n
* n1 g$ z4 j% x0 l( J- function create(ctx, state, entity) {
. W8 v {9 S' S! q - let info = {4 ]8 C j% a$ G. a
- ctx: ctx,' c7 M, z% L3 F8 q ^0 V! y" M: r
- isTrain: false,
/ p% I9 W% ]6 N - matrices: [mat],$ d; ~# Z' s) w% u. r5 w- V
- texture: [400, 400],( u4 `! W, Y4 {
- model: {7 H: R8 O- |- l$ W; Q2 k
- renderType: "light",
& Z) k9 E: j3 S) F4 L' H1 ]+ z X - size: [1, 1],, t; i4 F) \0 _$ r4 h" ~
- uvSize: [1, 1]8 B8 _6 m% A2 E$ h! _) K
- }) W: @' A+ ^5 a# [9 F: S
- }
: q/ i2 G9 x- o. v/ K+ D - let f = new Face(info);
, t& Q' ?: y( ?5 K( b! h - state.f = f;, Q; S( E! F7 A$ j4 ?' a' J
( F* O; V% d/ v! |! t- f7 I# v0 _$ H- let t = f.texture; z: D% g* N- o2 V- ]
- let g = t.graphics;
! ^$ `' L- _3 g9 y: a - state.running = true;
8 c/ |: X/ K: c3 @ X8 ]8 e b - let fps = 24;
3 v: [5 d) Y- c' [2 c - da(g);//绘制底图 H# t0 ^' _+ X, r2 o `0 s
- t.upload();' X6 r9 D% s; ~/ z$ F$ Z4 o, w
- let k = 0;) a7 A$ p9 U5 Z% }4 g9 V' r0 C
- let ti = Date.now();; C4 x9 ? {# j4 O& i5 _! o) d" m" V
- let rt = 0;
D: T+ M- o4 i+ ~ - smooth = (k, v) => {// 平滑变化: Q- Z: H: `' b/ D
- if (v > k) return k;
/ ?( ?. I3 i+ B, J+ s) ^( K6 Y! M - if (k < 0) return 0;% `" N+ W$ R, ?0 g/ |. }
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;5 F) {4 D; m. l F+ w( E
- }
. D) H3 l# j& t# f - run = () => {// 新线程
( T" Q) w) [0 f+ U9 t8 F6 c" H - let id = Thread.currentThread().getId();/ H* `& v) c( ^8 E' N! |! ?9 H
- print("Thread start:" + id);
' ?: C2 y* `. j* H - while (state.running) {
w) a# S- L6 c8 n - try {
- L6 q3 {8 ^4 n! z9 e& D3 j7 Z - k += (Date.now() - ti) / 1000 * 0.2;
( s; H! U* n) n0 \& f3 M - ti = Date.now();
2 _' V$ T5 _; { O+ Y; H - if (k > 1.5) {
, ~# |& v8 a& M8 \3 P - k = 0;. s& S, h9 W8 g3 x0 j
- }* A1 W8 P+ c) _& _# s) ?* T
- setComp(g, 1);
x6 v/ T/ b# K) g- q4 c8 k - da(g);# K1 c( f/ r1 }5 B8 f* @
- let kk = smooth(1, k);//平滑切换透明度
- d: A. P- D* S* z" {- O0 | - setComp(g, kk);
# A7 ^+ K' j- b - db(g);4 J4 e* o& L( g: S
- t.upload();
% x' u) _5 a E9 a% ? - ctx.setDebugInfo("rt" ,Date.now() - ti);5 s+ e! {# E, X% e% v
- ctx.setDebugInfo("k", k);' w# q, q5 Y, K4 [3 V& z! V
- ctx.setDebugInfo("sm", kk);
1 q* E1 @- o5 I - rt = Date.now() - ti;
, d! n% p0 |7 j; Y; m4 v - Thread.sleep(ck(rt - 1000 / fps));
) S8 j1 A4 L- Q) T4 V3 _ - ctx.setDebugInfo("error", 0)) g# C: g$ j0 h* u! [( x
- } catch (e) {, K& E' x S3 e; \' D
- ctx.setDebugInfo("error", e);. S, `+ ?2 _2 X# f% D; t' q. w" V
- }" i4 k( E X5 o" `5 a# l. ^
- }, K" T7 r a5 D) \1 H/ k5 z
- print("Thread end:" + id);
. t" I3 Q5 {$ w- S; [0 b! | - }
5 E5 R' P3 g. c/ k3 O' ?( C: t - let th = new Thread(run, "qiehuan");
F( T7 h/ h$ Q8 V: G/ C( X - th.start();
' C* Q6 m2 r$ w& [ - }
. `! T3 B1 w$ p - - e9 C1 J" M9 y0 k( o' {' S! J
- function render(ctx, state, entity) {
1 ~. F+ y" \9 e' I" o' ^! T - state.f.tick();/ \$ |6 Z. [- U
- }
% I" p0 P. r$ s: {$ N7 t1 n. f- X
$ \6 g4 y. Q2 J" C' m. z- function dispose(ctx, state, entity) {
- b+ r) Q1 K0 Q) D4 I - print("Dispose");' g3 c5 G5 z" B0 G) V3 X
- state.running = false;1 a( M0 |+ d* H8 Y
- state.f.close();- z9 S+ b7 X! o
- }
) c( E; L2 E+ c) Z. _/ |& c3 ^* X - 2 \% O* m1 q j
- function setComp(g, value) {
2 j3 T/ u/ l0 M/ ~% O - g.setComposite(AlphaComposite.SrcOver.derive(value));, x! q- v* n7 P$ r5 h, t) K
- }
复制代码
y$ T; h9 @- C8 P k9 Q' e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。& A* s" e4 c" @& E- T
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3 ?5 A) s' s* `2 P3 w) g3 T' ~: \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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