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( b" d+ w; p& a& ^2 r. e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。
O! t2 c( ]$ B% @+ x4 o9 w- importPackage (java.lang);
# I: U2 X( z; |* h, e* u' D - importPackage (java.awt);6 C# e# s; V1 c+ B, R. J
& K& G6 I2 |. r5 L9 h- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
" z. ^! `. G8 ~+ O) t4 Y - let frc = Resources.getFontRenderContext();: I+ v8 e1 b" {+ Q
- bounds = font.getStringBounds(str, frc);$ T0 D% u W/ E0 D* S' [
- return Math.ceil(bounds.getWidth());
5 [9 a4 f% x# r+ `# n4 X% w - }
/ V5 [7 p: q+ h+ I( x; d" q" y - V4 B& s% k) y: O* |7 E
- da = (g) => {//底图绘制# x7 B- R9 R) F7 O; _- l
- g.setColor(Color.BLACK);
0 U. [& t) Y$ v- J2 \. ?+ R [& Z - g.fillRect(0, 0, 400, 400);! U4 z0 b. w1 Z7 {% G
- }
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1 M6 A- ~, d" M8 c7 G- db = (g) => {//上层绘制
E! _: X7 \7 p, J - g.setColor(Color.WHITE);
1 U1 A" i9 G3 G - g.fillRect(0, 0, 400, 400);
" c0 B3 Q/ ^* e, A2 E - g.setColor(Color.RED);
& k/ Z; ~& w) D. B8 z - g.setFont(font0);0 K0 X0 ~1 r& A9 F
- let str = "晴纱是男娘";
: {7 Z6 U& z4 i8 Q - let ww = 400;; I2 R, w: L, A$ m
- let w = getW(str, font0);
& |! r; X# @; U. B$ Q! D - g.drawString(str, ww / 2 - w / 2, 200);# S. ?( Y# s. O; `5 [1 n$ P# w
- }
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- const mat = new Matrices();
8 N7 Y1 W6 o9 R; _* A% I. y - mat.translate(0, 0.5, 0);
# P" p- |- ?+ |% u/ m
X1 K% O& R3 j- function create(ctx, state, entity) {
- y+ q5 j4 @5 g U3 Y3 O; a9 u) S. D! q - let info = {# z0 S; O6 `6 o& X1 Q a$ g; _
- ctx: ctx,
. N$ X7 W0 D' u" Z( f6 L3 b, ^ - isTrain: false,9 p4 C6 U2 [; P. U) _( C# ^
- matrices: [mat],
! E; R+ b1 y6 s! f7 C7 ?! e - texture: [400, 400],5 w2 p/ M% f+ D1 }) F4 t
- model: {" ?' s9 z8 w' _- k" K; N( X1 A
- renderType: "light",
2 i. v6 p3 L- ~7 X - size: [1, 1],
& ~" x: r; q, h6 Z3 }( y! A* T - uvSize: [1, 1]
+ T9 Q* |7 J2 s, j - }
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( o9 W s8 G# `) B8 b" B. q3 F - let f = new Face(info);; V* l+ p Q: ~; k
- state.f = f;- n& w8 @# n+ p+ V6 N
- ' V1 f1 h* p$ g4 p3 n: K9 p
- let t = f.texture;; B ~ i: ? O0 C
- let g = t.graphics;
+ _/ m+ S, R$ r" @: j - state.running = true;
/ G/ Y4 y6 W( V4 L - let fps = 24;
5 ?" Z9 G+ U) O& _ - da(g);//绘制底图
7 Z7 _7 R* d0 J3 M1 u3 n5 ~ - t.upload(); s, ~! B8 h2 e7 a( G3 W6 @" R
- let k = 0;" ]& b0 ?- c# g
- let ti = Date.now();
" c7 }4 w% \' t8 _& w - let rt = 0;
4 A T. q' D! s& E" O7 G. n: W - smooth = (k, v) => {// 平滑变化; O2 D' F m e
- if (v > k) return k;
- _8 k4 U% o9 k - if (k < 0) return 0;6 ]" ?- m' ]0 G* R
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; ?9 l M: `1 D/ ~% K4 [
- }* v0 Q8 n: q1 h7 O, g0 M
- run = () => {// 新线程, C& c! a: n$ |. _; M' B$ k
- let id = Thread.currentThread().getId();
# L# Z9 T/ y$ X0 ^ - print("Thread start:" + id);9 v* z a1 w" ^* I1 J
- while (state.running) {& j( b. O1 o* G5 G" A( ~" J. L
- try {
- y8 b* S& P0 L) J4 w3 Y g - k += (Date.now() - ti) / 1000 * 0.2;
: u" d: w0 Z/ e* O7 V- V1 d* d - ti = Date.now();
# F5 M5 O" A7 m# V, J" R - if (k > 1.5) {
3 s" ?; }4 |. B - k = 0;. w6 @; ]4 R) `
- }
- _' }- k8 s, B4 q5 a0 S, N* v - setComp(g, 1);0 k4 [+ H* J3 Q# P/ a5 t
- da(g);
) j% G0 z& U4 B2 _, g6 k) ^ - let kk = smooth(1, k);//平滑切换透明度
& d$ j/ l9 N$ _' g$ l2 b% j0 d - setComp(g, kk);
4 ^. ], V! [5 v$ R- D) K - db(g);
, B: t- y% g+ e$ S* H- i- N - t.upload();
' `+ p2 R' e0 r5 f+ c* L+ y$ w - ctx.setDebugInfo("rt" ,Date.now() - ti);+ B/ |* O5 Q, P
- ctx.setDebugInfo("k", k);
' U' w3 ^$ K6 n) j3 I1 | - ctx.setDebugInfo("sm", kk);
6 `4 Y+ C; ], v y8 D6 i - rt = Date.now() - ti;% P* L5 u6 Q+ i J" i5 j& F8 |
- Thread.sleep(ck(rt - 1000 / fps));+ t( y5 n* R9 W# C
- ctx.setDebugInfo("error", 0)
k8 K+ [. `2 E! z3 Y5 t - } catch (e) {
* s% ]9 W1 C4 e. @( N7 ]3 Y$ g+ Z - ctx.setDebugInfo("error", e);
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- }+ U; E& @6 B0 S2 n: b
- print("Thread end:" + id);4 N# h+ x* h8 E& g$ Y
- }
1 Q/ b2 O! l1 D" o/ H6 K$ ^ - let th = new Thread(run, "qiehuan");
# [/ a2 M# J2 I3 H! |8 G, ] - th.start(); M7 k# D0 w# k4 z
- }) U* Q' g; q5 d; a4 A7 |' m+ T
- 6 i* N. S# ?3 q9 H
- function render(ctx, state, entity) {
+ r0 G# J q% A - state.f.tick();! l! J* E5 X" q
- }
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- function dispose(ctx, state, entity) {6 U* L, o8 q' f
- print("Dispose");
% I! y7 q5 z" [# I) G$ Q y - state.running = false;
: n3 k+ {3 I/ q/ r7 `0 y - state.f.close();
' W* \9 i$ D! u/ {2 s$ R _& Y - }
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9 \% H. c0 `- d: T! l* g& Q9 E9 q- function setComp(g, value) {; G# @/ x; |. c; H2 r5 T/ A0 l
- g.setComposite(AlphaComposite.SrcOver.derive(value));/ A: n- S0 n# l6 q) Q
- }
复制代码 3 g9 P- [3 W( J7 k! k) p: X
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。/ ]! T+ y4 \: Q0 j
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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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