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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。
, j. H, Q- }8 g; E- importPackage (java.lang);
) r# l7 t J& G% M, G* t/ w - importPackage (java.awt);
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7 F3 ?' F. N3 N, y7 h& h* K- include(Resources.id("mtrsteamloco:library/code/face.js"));0 s8 t+ A+ L" ^: t, X- g
- / u9 M7 `2 M& E) u1 j1 A% @
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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6 i3 f% {/ p( E2 x- function getW(str, font) {9 M- v7 E- V2 q# z' {* L
- let frc = Resources.getFontRenderContext();
+ g) s) w0 w, N4 b6 s - bounds = font.getStringBounds(str, frc);' Q3 M5 S1 s6 O* D$ y& r/ a
- return Math.ceil(bounds.getWidth());
6 s) e6 W' [ } a/ C* O - }
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, X: M4 V( N: @5 n% h. ^- O: U- m- da = (g) => {//底图绘制/ n& ?3 G& z3 L0 C; V" Y
- g.setColor(Color.BLACK);
/ l4 D$ Z& y$ Y9 ~1 q- v - g.fillRect(0, 0, 400, 400);
' y2 w, _8 J ^: i - }
: W6 S- O1 a$ m
; Z2 ~! B t, U; J6 p5 {- db = (g) => {//上层绘制! J; `4 K$ Q9 O! c
- g.setColor(Color.WHITE);
% s$ f# `. |' t, |6 B2 ~. t4 Z - g.fillRect(0, 0, 400, 400);
. ^* ]1 q* Q' T; V% V8 l6 G - g.setColor(Color.RED);4 i5 O, `* Y$ K; O9 ?
- g.setFont(font0);
' F1 [2 ?, |/ ]4 A* h: [5 ? - let str = "晴纱是男娘";
; {7 D) ^' J7 [9 p& b) f* H% J# q! Y - let ww = 400;* w* l4 o+ _6 ^2 ?
- let w = getW(str, font0); `5 r5 r. E1 O( A. r9 L% l! L. n
- g.drawString(str, ww / 2 - w / 2, 200);1 b* d3 d% O8 |& M1 t5 g
- }
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+ W, L& q5 k( {$ Q- const mat = new Matrices();0 k2 A) A3 ]% b0 J r: W9 c
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {! s8 Y6 _/ J6 p+ b- @2 d( R
- let info = {' p" r( m1 e3 Z6 b
- ctx: ctx," H! j& r6 e% s9 u
- isTrain: false,$ t- k* L, b9 S
- matrices: [mat],
( S/ J" d, k1 t' d - texture: [400, 400], m. v8 T0 `" ~* \+ d7 U# \
- model: {
+ C2 G5 Z. P/ k4 M - renderType: "light",+ u' g5 s! R2 \$ }1 n+ f$ g8 n
- size: [1, 1],
$ c& c7 Q! i" s' O3 l - uvSize: [1, 1]
- V o) F1 Z+ f/ x9 @ - }
5 G5 M: z9 J$ n8 M - }
3 c/ D9 w' }' h c1 b2 I/ B* A, Z& Z - let f = new Face(info);
3 v+ M: y' q0 L5 |) @. u. B: m - state.f = f;* G2 o6 N% Y% m+ i4 ?
- & P5 B0 ~" d ~! \
- let t = f.texture;
$ r* r. q0 F0 G- H Z9 Q# [ - let g = t.graphics;
9 }. |% o" u9 |" `9 v7 T; E - state.running = true;
* v1 S- h9 D9 x1 a6 X w - let fps = 24;
0 P6 e' N% d4 ? - da(g);//绘制底图
6 p$ N b: H) C5 p: D - t.upload();
/ c2 _. H8 \+ q. d$ s - let k = 0;
; @8 }! p5 l4 Y, B; P% [: ^# m& h - let ti = Date.now();
1 \( U) ]3 m; g+ G - let rt = 0;
* M9 M U( I: m0 u - smooth = (k, v) => {// 平滑变化
+ w3 ]/ H' k( `- o! G- N# I - if (v > k) return k;
2 F, v# |: v! a - if (k < 0) return 0;; S. L7 h3 g* R" m: o9 ?
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
m0 q) b. e$ K( a - let id = Thread.currentThread().getId();
* Z# x0 F; u* Z' ^/ J - print("Thread start:" + id);7 q4 H. T; j5 _& w$ s" a; |3 U' h
- while (state.running) {* Q, l, h2 g1 ^0 h0 a A
- try {3 X w2 {5 n/ w/ h
- k += (Date.now() - ti) / 1000 * 0.2;5 i+ N( P! t4 M: |2 J, L
- ti = Date.now();! j6 J5 b4 Z/ v/ }, u
- if (k > 1.5) {1 B, z g. p: ^
- k = 0;
P/ o2 M' ?# {$ g2 e* V- T; m - }. y3 L* @2 F- k$ v
- setComp(g, 1);
' v6 ~) I7 b3 z$ e9 h6 Y - da(g);
8 a5 f# J# C: P( ? - let kk = smooth(1, k);//平滑切换透明度% s* }5 w& A9 n9 t
- setComp(g, kk);
; B! I; q: y$ V - db(g);
7 [( k( r- T( a - t.upload();
) A9 D. A# h! z+ D5 f - ctx.setDebugInfo("rt" ,Date.now() - ti);9 F* q: k" }+ Z' S- \
- ctx.setDebugInfo("k", k);
2 K5 b- Z- s0 e5 m7 k - ctx.setDebugInfo("sm", kk);' m) p1 b6 H% C0 l
- rt = Date.now() - ti;6 [( l* p. p/ c N: V
- Thread.sleep(ck(rt - 1000 / fps));
( s( v5 ?; m/ x/ ?6 V! q3 ^2 A, n - ctx.setDebugInfo("error", 0)
" X) l0 A% f2 V& Y* h - } catch (e) {
5 X1 X/ b. g* x2 r+ W8 a, ^ - ctx.setDebugInfo("error", e);/ Z: d5 b* R c' v
- }
, ?6 a/ H9 U6 A3 V - }
6 ^$ |6 Y) l2 U$ X* U - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");1 \+ b; p, `$ G U7 w7 ]
- th.start();) K7 \/ M9 u, v3 e
- }
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- function render(ctx, state, entity) {
' I* x, u- e' l3 |* l - state.f.tick();
" A6 r4 }9 q% }' a X, _/ V - }& f o0 F3 b3 J7 v
7 k' }9 C+ G4 Q; D- function dispose(ctx, state, entity) {
- `5 G2 w* [1 M' n: g. s8 J5 P9 H - print("Dispose");
( U, d8 c9 |) U/ }0 d" ~ - state.running = false;0 K- I* j: q6 y1 n( F
- state.f.close();
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/ A# c4 s4 c+ E8 g$ k" u- function setComp(g, value) {
) _+ S, Y y- g6 W - g.setComposite(AlphaComposite.SrcOver.derive(value));& R0 H( W+ [# ?* k! N
- }
复制代码 - N0 _+ o3 D# `4 f
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。0 q4 X( \) o8 p$ `) |" u5 ^4 B2 b
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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)' R: ~& S: A8 q5 h) P9 J
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