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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。
0 D, N: ^3 M4 m( w9 Z' F& J4 v- importPackage (java.lang);0 N- E9 i7 i4 {& y
- importPackage (java.awt);8 K3 h y6 F- W7 S
- 4 R) j" }& ]9 y; q
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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9 J2 S H K6 O3 B! h- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
- s! E: h) ?6 z! B' G! m
2 Z3 m+ R5 B6 `' c, i4 `0 i- function getW(str, font) {
; D% l" O% d, E% B5 A6 z, M W - let frc = Resources.getFontRenderContext();, z" k& [ b, X7 [3 I0 s+ F1 g
- bounds = font.getStringBounds(str, frc);/ `" j4 \5 |1 _4 F$ J4 l' H! ]
- return Math.ceil(bounds.getWidth());
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- 2 ?7 ~) T& R5 X4 X
- da = (g) => {//底图绘制1 {# [; Q; N$ I. x
- g.setColor(Color.BLACK);# S0 ?; T7 r/ v- U2 ^8 Y' V1 b0 t
- g.fillRect(0, 0, 400, 400);
) v6 n) M; Q* s& i' F K, w8 Q0 o - }
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- db = (g) => {//上层绘制6 U- f- X @- p
- g.setColor(Color.WHITE);4 Q% X; d# r/ ^0 F7 Q
- g.fillRect(0, 0, 400, 400);) d$ ~' U; }: b7 W; p t8 u
- g.setColor(Color.RED);1 n. [) h y, X* c% J, M* U6 S
- g.setFont(font0);
6 T. K/ J1 ^; t - let str = "晴纱是男娘";
* A) o4 e9 X" a y, _1 s - let ww = 400;
P: x9 j5 n9 U/ U - let w = getW(str, font0);0 w7 |9 e1 m2 [3 i
- g.drawString(str, ww / 2 - w / 2, 200);, W( W, r* L. E# _# }5 e% f L5 N
- }* p, E! O1 k! G
( U5 T% R& S. v; ?7 F* S, B" ~- const mat = new Matrices();
: |6 V2 \5 G3 V8 W" u" [ - mat.translate(0, 0.5, 0); V# G0 u, n5 w' C! ]
- ; O1 Z: ]5 N( Y8 e6 E
- function create(ctx, state, entity) {
( f' A9 Y; j7 _- z3 B& P' w: p2 e4 i - let info = {. p6 K2 l+ e. g
- ctx: ctx,
$ s) ~1 M% A# k0 |7 a1 B+ p3 z - isTrain: false,
. a; W. E/ q4 q, u! u - matrices: [mat],
. Y% X8 Y. U8 Z1 n - texture: [400, 400],
( C& U5 Y0 i$ p% x6 @3 P9 P2 i1 f - model: {" V2 O! L. q$ c
- renderType: "light",
9 {, r3 q' }+ D5 Z4 U+ i - size: [1, 1],
& `& \6 f! z7 T6 r$ o - uvSize: [1, 1]) {2 t+ R2 M& W! ]8 k
- }
* Z K) \ f6 f5 R" z/ F7 t W2 o8 I - }- t2 {2 u+ l) y: z) e; g
- let f = new Face(info);+ R7 B# F# @, u
- state.f = f;
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- let t = f.texture;
, ^0 @7 @# N6 [; t - let g = t.graphics;
1 @5 ^2 M# m* j! u - state.running = true;* T, w5 S9 D! I' j4 n. `
- let fps = 24;6 _# M' P! _5 F& n2 B/ n7 S
- da(g);//绘制底图% e; C) k- n- p" N$ D- \% ]- _
- t.upload();
8 f' S" u9 Q% e( _' | - let k = 0;
' ~+ Z% J9 k0 \/ z1 Q0 H - let ti = Date.now();
; }6 k% e9 z" ?* K4 S/ G# ~7 g - let rt = 0;* x- n$ p- ?1 m/ W( r/ o
- smooth = (k, v) => {// 平滑变化
' N$ ]7 ^ Q8 q! Z - if (v > k) return k;
5 \, J' r# A% \ - if (k < 0) return 0;) G) Z, K7 Y. Q
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 ]4 d, c4 g" z( G3 z' ~% f. K/ A& ]( e - }
4 V* l/ j, {. S7 C+ V L$ o - run = () => {// 新线程
( W" m+ a/ e% U7 Z [' M$ r - let id = Thread.currentThread().getId();
) f% M" Q6 O7 m5 R; @9 _ - print("Thread start:" + id);) b9 e- z% a7 V" c
- while (state.running) {
+ s5 Z* i# {' R8 N5 j$ f7 u' ^( a - try {. R; C7 {' o6 e9 F5 R6 e( J
- k += (Date.now() - ti) / 1000 * 0.2;
) R. X; z# B1 V5 W) Y - ti = Date.now();% {) Q" \1 {, ~ h3 R; C c, y
- if (k > 1.5) { {, a# p- ~8 ^9 R. P- K3 e
- k = 0;. g% z& q1 S7 a6 J+ N8 G
- }& x5 I% t$ W" F/ X) _; e0 }
- setComp(g, 1);2 t& l3 s: e! {
- da(g);$ y; |% s7 n% }% N7 R
- let kk = smooth(1, k);//平滑切换透明度
3 q3 d( n3 z( t( h* L- C - setComp(g, kk);
0 W$ y* O/ V1 \. Y6 t8 w - db(g);- ?* ]3 }0 k3 Y7 w
- t.upload();* X4 m3 G( g8 U& |) {- N5 l
- ctx.setDebugInfo("rt" ,Date.now() - ti);- G( k% h$ P8 [" X* O* t2 P) x
- ctx.setDebugInfo("k", k);
% Z; I' [( C% M, }- h - ctx.setDebugInfo("sm", kk);7 @' ?+ r4 D, e% T% q: S3 V' [
- rt = Date.now() - ti;7 S+ u, K/ Q# g, l. q) O: ?
- Thread.sleep(ck(rt - 1000 / fps));
& v8 {5 d. C- k4 z. u9 K% } - ctx.setDebugInfo("error", 0)( `, `! m V& S0 W/ L
- } catch (e) {
8 v) t! {2 r, T- L8 j# a - ctx.setDebugInfo("error", e);
, m! \5 Q, S: C - }
- y9 o# y( Y. d0 y - }# n2 R8 ]9 Z4 F) K# O% V
- print("Thread end:" + id);3 q! o& d- w" X; j/ E! @
- }% R3 ?" W, @" z, ?* R4 V. n- I
- let th = new Thread(run, "qiehuan");
% B( A$ N" e$ L) ] - th.start();
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- ! i" K5 {: u! A5 Y% Q. k3 k" A1 a8 I
- function render(ctx, state, entity) {+ D0 \$ G( M9 `
- state.f.tick();
; J4 ]& R+ n0 l9 v5 {, X* \( q - }
8 D2 {% Q! i5 J# g# e2 \
, \" s+ Y* W: M8 [0 {- function dispose(ctx, state, entity) {+ r A! C0 Z4 Q4 n7 |# L
- print("Dispose");
5 Q8 s- Z% }. F9 @/ A% F" C7 ?* f* g1 g - state.running = false;
$ E1 Z: c# R* v1 l2 n5 x5 V - state.f.close();: ` J! y8 Y+ E- r0 L
- }
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- function setComp(g, value) {$ k6 Q& r# M' R8 u
- g.setComposite(AlphaComposite.SrcOver.derive(value));* h- B( _3 j n* w3 C4 h
- }
复制代码
& V! h- A9 l! R3 y: c1 ~6 d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。8 w/ v; t" i" y/ [0 P
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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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