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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。 T, M% u! T: S; e9 C
- importPackage (java.lang);6 a5 D0 l: T; t
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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/ f/ @) U3 G( i7 p' \1 e- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
8 e& ^, P( D; E0 }# w1 b; d - let frc = Resources.getFontRenderContext();. M: }( Y. p) ~7 N/ `% ?4 D ^ x( V
- bounds = font.getStringBounds(str, frc);
; x4 X: R8 n" d) w7 l: _ - return Math.ceil(bounds.getWidth());
5 x p8 H3 ], Y) c - }
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5 _+ E' Y, Z! N9 ?% I- da = (g) => {//底图绘制1 L8 Z5 y7 H! _* d, s
- g.setColor(Color.BLACK);" ]; S* w3 I) p+ ~
- g.fillRect(0, 0, 400, 400);' t6 @1 x4 ~$ o! `
- }
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4 h: B; [: V5 P! I8 `1 e: _: q- db = (g) => {//上层绘制: f7 c; C' u4 d/ H9 {
- g.setColor(Color.WHITE);; _! ` Y# a% ?' e+ @
- g.fillRect(0, 0, 400, 400);
3 Y+ D1 H6 K S! _7 i, D B - g.setColor(Color.RED);
& C+ e0 \: q- }* y - g.setFont(font0);
/ H# b, _ C% k1 w- @ - let str = "晴纱是男娘";
$ N/ }5 C. R/ p& b" Q* u# e - let ww = 400;4 r- {; x2 g9 r2 L% Q/ [1 f- ]- {7 A
- let w = getW(str, font0);
' V! ~ E7 m3 K0 w, ]/ t. G% s - g.drawString(str, ww / 2 - w / 2, 200);7 h; O, d0 `6 N! t, z0 m1 x, L
- }
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: A/ i8 y! y8 E/ ]1 l7 @- const mat = new Matrices();3 Y. f' l; V3 J: q3 o
- mat.translate(0, 0.5, 0);
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; v {0 }1 T2 L; O' L- function create(ctx, state, entity) {* N3 H5 I# ]: z, n. [
- let info = {
; x7 r" l* D- k - ctx: ctx,
* u6 h3 I+ @$ P$ {) c5 J- a5 M% L, C: D - isTrain: false,
& A e$ S* A2 U y4 b+ b! v - matrices: [mat],
4 k- H. E2 y3 K, o - texture: [400, 400],
) \+ b5 G2 x* M1 s ?% _: m - model: {& }; ?7 u6 U4 C& ^
- renderType: "light",
* d+ X2 i" J2 \1 F+ r+ Z7 T0 I - size: [1, 1],3 N- L( P2 Y: T1 j- O4 l
- uvSize: [1, 1]
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- let f = new Face(info);, V0 l+ O: E& {( P! e. G7 D# r6 `
- state.f = f;
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3 k& Z# L: K0 H- let t = f.texture;
8 N% _# O/ E |" w5 k9 w - let g = t.graphics;
0 g. m0 u- d. ?- a# Z - state.running = true;! q3 _8 @) ~2 U( v2 N2 e2 c
- let fps = 24;
2 \4 z1 j3 Q; |# i; A - da(g);//绘制底图
4 r6 f2 G$ y* P - t.upload();
J/ M5 W2 l, h+ p+ O8 L - let k = 0;
9 v' q: P t/ A7 Z - let ti = Date.now();' o& G6 v' O' W, D: [% P# k
- let rt = 0;
7 Q) G( Y8 ~) y% e - smooth = (k, v) => {// 平滑变化
' Z( `- @5 p4 g( ]3 s) C6 B+ o i - if (v > k) return k;
! A/ o7 w2 I7 E& q - if (k < 0) return 0;
6 m7 X, R9 x1 y3 m$ I - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
+ B% K) `5 i* n# I* ?# v$ A2 Q - }5 k$ h; X8 u# T3 [
- run = () => {// 新线程
, g# C/ |6 v8 B/ u" a. c: B - let id = Thread.currentThread().getId();
, v2 \$ N; D6 n3 r; d0 x/ | - print("Thread start:" + id);
4 Y! g" n5 \4 a. l1 q+ n" ? - while (state.running) {
& ?3 U5 s( l$ Q2 c* x - try {
# d$ @4 W8 o) g. [+ E4 d, E - k += (Date.now() - ti) / 1000 * 0.2;
0 U W* Q; Z$ h2 q3 s; h( _ - ti = Date.now();( N# n; P* g0 R3 [/ f
- if (k > 1.5) {
9 {2 D; [/ O7 ]5 K - k = 0;9 p7 t) C: Q4 k! |& X$ q0 A
- }
) P6 d: ~ Z2 X - setComp(g, 1);$ t1 K( k+ c8 |8 B/ I& [+ k' n
- da(g);
1 a. [2 t# D0 t, w8 f7 Z, H# H' l: `' W - let kk = smooth(1, k);//平滑切换透明度
- B1 R% D R' j: Z6 L/ g5 ^ - setComp(g, kk);
" y, l' q9 _; Q6 D* Z - db(g);
! F4 C. b4 O3 Y4 y - t.upload();
- W4 ^8 m' T" @( l4 A0 p: w$ e - ctx.setDebugInfo("rt" ,Date.now() - ti);# k# ` x$ ^% B
- ctx.setDebugInfo("k", k);( ?* F* L. R: G# Y# \. u ^
- ctx.setDebugInfo("sm", kk);2 S" y2 h6 Q6 L: p& ]4 L$ U/ V- `
- rt = Date.now() - ti;& t, \- F8 Z9 T0 r& p8 ]+ T
- Thread.sleep(ck(rt - 1000 / fps));
3 v8 n* s& [ P - ctx.setDebugInfo("error", 0)
4 B* @' n& `$ M* _' g3 v - } catch (e) {0 z4 K1 k6 p" T) B$ u
- ctx.setDebugInfo("error", e);0 X6 L3 U2 f* p
- }( ~ \2 E! Z5 w* A, ~, G
- }8 T& \1 l# g+ v6 Z( I% w1 a+ m& {
- print("Thread end:" + id);& [) s$ w" Y8 V) [
- }
1 n( h# B- H5 b+ z4 h% X - let th = new Thread(run, "qiehuan");
2 s! @2 d' a' X; P: B( H! @, g - th.start();6 m" Y& v# |* x! L% {! x
- }3 J. }# G! r" \: V( |5 X* N
- 7 ^" S1 ]5 f" d
- function render(ctx, state, entity) {
9 q' m& C% Y9 F: r7 w. J, J) F - state.f.tick();8 a' M+ p, ^6 m: N F- H& S- W
- }
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- function dispose(ctx, state, entity) {9 x5 v; f. l0 w" ~2 n
- print("Dispose");$ T# L4 h) S% W: P0 t
- state.running = false; t+ f e7 N$ ^) m' k7 }& J
- state.f.close();4 {% D& u/ I1 K% u: e4 v# o9 M3 J
- }
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- function setComp(g, value) {
& e3 z5 v2 e% L% d! C0 ~ - g.setComposite(AlphaComposite.SrcOver.derive(value));
& @, q- q% j* T* j( V - }
复制代码 + C+ C. w& x- G0 [( n. t
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。7 K& Y/ W$ }) o9 T2 t4 R2 v$ E
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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)4 d# w! D& g" P$ x) g0 Y N
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