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% c t2 {7 h( s5 G% y) b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。
7 e1 c+ T9 J( k! s6 E' P- importPackage (java.lang);
! f7 ]4 V6 T, J: Q - importPackage (java.awt);6 C$ d- ~' J" _7 W) ^$ P
- " O) ]7 l! @4 [' a5 H9 y2 S* p. t* }5 m
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);% B9 S% X5 W g$ [. N0 a/ \" ?8 B
- # p j: s# `' {4 p
- function getW(str, font) {0 X+ W6 N( K! g, |: k' ^
- let frc = Resources.getFontRenderContext();% F" Z8 M2 Y8 k+ p% h: h
- bounds = font.getStringBounds(str, frc);# R8 F+ D* \. Y( L
- return Math.ceil(bounds.getWidth());
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- ) c( u9 v! f/ Y( P6 s7 d
- da = (g) => {//底图绘制6 p$ @% s# z P0 M) V$ z3 o
- g.setColor(Color.BLACK);
. o! g5 d3 ?% i1 L% K4 ~8 } - g.fillRect(0, 0, 400, 400);
4 n$ r: Q6 F7 k+ i4 } - }
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- db = (g) => {//上层绘制
# D( c0 D7 l. r3 M - g.setColor(Color.WHITE);. o' w7 i. C, F7 Z% j& v* u
- g.fillRect(0, 0, 400, 400);7 O2 [; O1 V( u
- g.setColor(Color.RED);
g. | y K0 d; A$ @( Q2 e - g.setFont(font0);& z5 _; j$ q1 y
- let str = "晴纱是男娘";& C( K: [3 S, W6 q$ @: |
- let ww = 400;6 w+ P/ R- t$ o8 B6 d( P
- let w = getW(str, font0);% p% X4 R8 y7 L) W2 N
- g.drawString(str, ww / 2 - w / 2, 200);
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- # V2 a8 ^2 j8 a* h% X: @' O
- const mat = new Matrices();& Q8 O5 y0 g9 n# G/ @8 P* I
- mat.translate(0, 0.5, 0);$ G) k6 H9 L# \% N8 L! ~
' F* |% _- \* u3 @3 [* n- function create(ctx, state, entity) {
& g' n; ]$ b, Q7 u4 ` - let info = {
- |/ f4 i& v2 e% g+ ~ - ctx: ctx,& l- G8 e' i6 c; w$ s
- isTrain: false,3 j6 d9 q+ D' u& ~, o+ [& O
- matrices: [mat],+ O: v' o0 ^2 b: j g* F. Q' @
- texture: [400, 400], N8 d+ S7 M& B) P" ~$ @
- model: {( u) s4 _# c9 Y0 m6 V
- renderType: "light",
( I% R, K! [. G) n - size: [1, 1],& \. v! r. u+ i. W& q k: @
- uvSize: [1, 1]
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- }
, ?" G" K/ B' u8 E* o - let f = new Face(info);
- x1 d3 e( {$ G' O - state.f = f;: C5 ?# C; g, S* C( [, b1 \
2 \( {5 w* P" {& o- let t = f.texture;
% m* P8 i6 Z P {/ p - let g = t.graphics;
# n7 z7 H9 ~( T' O - state.running = true;4 x# s8 ^1 g3 K9 B i' U9 c; i
- let fps = 24;# Q0 q# X1 g1 w4 ]" P: _
- da(g);//绘制底图
* X! T4 q- }- A - t.upload();( f/ [4 ~1 G6 @: h+ M5 T, l) A
- let k = 0;, `' I7 j. i: g6 V
- let ti = Date.now();! l7 j0 V! T7 x, V8 j
- let rt = 0;! X& V' B4 k6 Y. V5 I
- smooth = (k, v) => {// 平滑变化
, U4 J& D& p9 |. H. Y - if (v > k) return k;
7 A0 c' R! W, t9 |0 Y9 C - if (k < 0) return 0;
4 F" @2 g8 V2 A1 {- Y% y1 d& ^! C: b - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程+ e& s0 W# a9 M# d* s- J* K2 |
- let id = Thread.currentThread().getId();' e) V3 I, W( n) Q
- print("Thread start:" + id);. O6 X; t6 ^. p; {/ k
- while (state.running) {: H4 l- ?$ j1 B
- try {
7 c5 i+ D8 q1 _/ {/ q* y: a+ z6 [ - k += (Date.now() - ti) / 1000 * 0.2;1 L$ ~) t; G1 v5 m$ ~6 ^# J( f
- ti = Date.now();% S6 W2 b7 {& A: n
- if (k > 1.5) {. J* g% r, c/ i* ?8 ]; f
- k = 0;
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- setComp(g, 1);3 o1 X( N) V. M, D% m
- da(g);
' x8 Y$ p+ ~( l; G8 v8 g - let kk = smooth(1, k);//平滑切换透明度
" L+ r& J) k1 q2 U3 ?% T - setComp(g, kk);
2 D5 @0 f2 w) ^0 B - db(g);
3 C% F2 I3 o1 X0 n8 M+ M1 { u - t.upload();8 \2 F9 O# k2 t' [6 {
- ctx.setDebugInfo("rt" ,Date.now() - ti);& x* v+ L- y& c* i
- ctx.setDebugInfo("k", k);& I. D; Q" C8 J. K- r
- ctx.setDebugInfo("sm", kk);
! J9 K# a4 ]7 _" l! J+ @ - rt = Date.now() - ti;" a4 g f- H, w. D: ]
- Thread.sleep(ck(rt - 1000 / fps));6 U" ]7 v- h6 p& N3 F
- ctx.setDebugInfo("error", 0)
( [" J, k& J( J" ^2 s# U; T - } catch (e) {
+ d+ m- Q/ `- j; b - ctx.setDebugInfo("error", e);
* d! `, R/ M5 R$ C- W3 H/ ^ - }
# X2 \: W" X7 p1 h2 o - }
& D5 u2 g8 W+ t/ H' V/ Z g - print("Thread end:" + id);) f3 |1 ?# ^' }$ S( s
- }
/ [1 o6 W0 Z* O6 I/ A% f - let th = new Thread(run, "qiehuan");3 b* F# g: y; j* k
- th.start();/ u- b* W' `$ i! k" r9 c
- }
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' u/ l1 B% }( J& I! {- function render(ctx, state, entity) {
( v2 u$ x1 h" @: M& k - state.f.tick();2 c! @" y. X9 C: N' c
- }! x2 {2 h& i1 E3 ^9 f
- # h9 \- L" R7 P; |: | N
- function dispose(ctx, state, entity) {
. ~, }; S4 T) S2 I( P& F - print("Dispose");* y" d) P9 Y: h# H
- state.running = false;
# U) M; m1 s: D* i$ z# M. R; j - state.f.close();
; Y5 V6 ~1 i& {2 b4 u1 q7 ]/ T - }
3 I% ]) W1 |/ H, M
/ u8 h3 o7 n) y* M& E4 Z' {- function setComp(g, value) {" X# r. K5 r( V& {1 \; Y* B
- g.setComposite(AlphaComposite.SrcOver.derive(value));
- L& x! u7 r$ Z7 O - }
复制代码
. D9 H- f, o9 o6 U# b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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