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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。
$ n" q$ ~# ]: P8 Y9 b8 C- importPackage (java.lang);- `- D0 s4 Q+ u( ~# x! {( x# A8 L" E
- importPackage (java.awt);
# l7 e" l/ ]) m* X4 P: b - 5 P+ y, N% v1 b; F
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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1 N1 M1 i& s/ { }- N: t% G- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
, h/ N, p# m" O
$ f" a" K1 r- o/ b" n( j- function getW(str, font) {0 N; I5 |% E @% _/ C/ i
- let frc = Resources.getFontRenderContext();- g" [! h# i; D) W* |
- bounds = font.getStringBounds(str, frc);
( m! K- h% T/ {( G: b# q/ Q - return Math.ceil(bounds.getWidth());
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- 2 w( I- I9 @3 `7 q1 O
- da = (g) => {//底图绘制* B% [: X( `9 f9 O/ F& B5 @. h
- g.setColor(Color.BLACK);4 s' o5 @% d" }) l0 l+ d$ Q
- g.fillRect(0, 0, 400, 400);7 G: y+ T* C6 a5 B
- }2 X9 e" i5 P* b3 g" g4 {. C
- $ r! O) D2 Q; H, m% d5 H
- db = (g) => {//上层绘制
- Q, |' i5 f w8 s, ~4 u! B9 K - g.setColor(Color.WHITE);: _# p' f8 ~' k* h: @
- g.fillRect(0, 0, 400, 400);- g* p* Y- m& U$ B- b* {
- g.setColor(Color.RED);+ P- n$ ]: m# i* j
- g.setFont(font0);; g( K4 U1 `" i& ]) y) k" T) @
- let str = "晴纱是男娘";' n2 O; l+ Z( C" f8 Y6 m
- let ww = 400;% b5 `9 b7 @, f1 n; H. j, R
- let w = getW(str, font0);, ]2 T1 ~+ r4 w3 x/ |; q
- g.drawString(str, ww / 2 - w / 2, 200);9 ^" I; ^8 M5 v6 P: L6 l
- }
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- const mat = new Matrices();
7 w2 P5 y- n& |8 y6 C% w - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
$ V1 y7 ^6 E& i0 H' `$ P$ e0 B - let info = {( B8 w3 t; d( Z
- ctx: ctx,
' I$ c4 X; E$ Y8 ?/ ] b - isTrain: false,
+ p- f7 E y' ^" a7 e3 w# [ - matrices: [mat],
, J& G8 X: @1 K( | - texture: [400, 400],
; d# Y" I7 X2 z* c - model: {
* b3 {# @! e; x" Q& i2 i3 o! q - renderType: "light",
" H: B6 i& A/ k [9 |7 K l! a - size: [1, 1],1 c* q9 n- W, |% J6 A
- uvSize: [1, 1]9 j& W: ~ \; y2 K6 k
- }( d. K$ D8 N Z9 r$ v: r
- }
& e0 G3 N7 h# L- V; S - let f = new Face(info);1 V* [4 u% G8 P6 B' N# |, J
- state.f = f;; j6 n6 E6 Y, e
- 7 a0 y1 o6 u8 W5 g9 c0 o
- let t = f.texture;: f! k, { l* E" ] G2 E
- let g = t.graphics;
. K1 R4 V# V4 }) ^/ I6 x - state.running = true;7 A K1 g! g6 {. k( C4 q
- let fps = 24;
0 H* k7 ~$ C/ S - da(g);//绘制底图
% C8 M W& W* V7 @8 l - t.upload();, y: P7 ^ w% J" r
- let k = 0;7 D5 |- K# h, r. m* ^( C1 m5 l
- let ti = Date.now();
2 y7 w2 N3 a' b: x - let rt = 0;3 k6 f1 ], V- ^" {( b9 ]8 ?1 o4 W
- smooth = (k, v) => {// 平滑变化8 X7 x, M- e; G4 Q. Q( ^
- if (v > k) return k;2 u. T% c/ U3 V* T2 d5 S
- if (k < 0) return 0;
b: A7 Q, `& w9 X4 l - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;/ S- B4 X# L0 u
- }
5 G! o3 o b: ]/ _- ` - run = () => {// 新线程& i% y( T( C. U T) E6 T
- let id = Thread.currentThread().getId();
( C2 e; H: G" h& q# E - print("Thread start:" + id);5 s7 f, C" c: W" j
- while (state.running) {+ c* h7 B: s3 A2 F2 O4 ]; U
- try {7 E. g7 Z2 \$ K; j n d) \ y5 ^
- k += (Date.now() - ti) / 1000 * 0.2;# V! x" B( s5 R! T
- ti = Date.now();* o1 ]" x* d1 `& G# Q
- if (k > 1.5) {
% a- f1 K, l; V6 G - k = 0;
$ ] `$ w, j0 e3 x2 ` h2 K - }
: ?. y r2 L0 f3 L - setComp(g, 1);1 g7 ~+ G7 T9 v) ^: a3 T$ f
- da(g); R: l5 E2 Q# |7 \& i3 _: p( p
- let kk = smooth(1, k);//平滑切换透明度
) t5 Z- h* l- U, U7 ]3 I - setComp(g, kk);2 Z5 P( c, p2 m) m* @/ w3 L) }
- db(g);
. R ^2 Z0 \$ J, V: m y - t.upload();
2 U' R9 c( E0 x4 _ - ctx.setDebugInfo("rt" ,Date.now() - ti);
. Z' d, _) |7 P# O3 J. a - ctx.setDebugInfo("k", k);
3 _# z* _8 X0 B$ Z( w* E. C - ctx.setDebugInfo("sm", kk);
& z! X! l+ b9 D - rt = Date.now() - ti;
U/ E4 N( F8 |9 `* ?$ w5 c% N - Thread.sleep(ck(rt - 1000 / fps));$ {7 Z# D+ Z6 y
- ctx.setDebugInfo("error", 0)6 p& w D$ b6 I L2 W8 e
- } catch (e) {
8 S w$ r& h: P" G0 E - ctx.setDebugInfo("error", e); M, B- i/ i8 V+ w5 U
- }
' O0 ^( P9 q; I, s- ?6 l# V v: t/ r - }
2 B! y( M, g9 k: A/ p6 E. ~: c - print("Thread end:" + id);; B- v2 O; y6 s6 I: I6 B
- }
8 I, c5 O6 e- z) k: s! ~ - let th = new Thread(run, "qiehuan");& s& F3 f* D; V4 o& o; q# t: K
- th.start();6 S" h& d4 x/ W9 Q ^+ P5 I
- }
/ V! Y6 r7 e. R6 l( `
* d1 V3 Z8 Q. x4 {- function render(ctx, state, entity) {4 n+ C8 O* k- X- m/ ~: s6 _
- state.f.tick();7 r: }) z! W3 `* e' _
- }8 [7 G# V9 G! _. h( }8 _
% ?! `5 ]% e* d. y8 o- function dispose(ctx, state, entity) {8 d. ~3 r6 o5 Z6 z' X
- print("Dispose");
2 Y8 D) ` Y* q+ b - state.running = false;
+ o, B! {% D( B+ M3 c - state.f.close();
4 n: ?+ C- B& ^0 F; p. _ - }; B* |: m5 Z5 }, v5 s
: U' ?( \* V; c) g; N- function setComp(g, value) {( c+ J; m0 o3 Q( J3 y% w
- g.setComposite(AlphaComposite.SrcOver.derive(value));- A7 J3 V2 c! {1 t+ M' g5 G
- }
复制代码 5 `4 }7 I+ v4 ~, V
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。/ V: }0 N4 l& a7 H# n! \
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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)% N6 _9 n0 Q0 K* x8 w
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