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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。* h( r! F0 F' z+ c" \
- importPackage (java.lang);6 I. f( }2 M4 V4 `1 w
- importPackage (java.awt);
7 R5 ]9 {6 A5 H% R - 7 a& F0 A# `2 M: H3 T) g
- include(Resources.id("mtrsteamloco:library/code/face.js"));4 X6 G1 E8 W, B( m
7 q# D! k3 O. X! @/ u) L- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);8 Q5 p6 K+ S$ r9 m6 Y( J
* z3 M+ g, l4 D9 c1 _2 X- V- function getW(str, font) {
8 ? L& t1 I6 d2 U2 _6 I3 X) ^8 w - let frc = Resources.getFontRenderContext();
/ K8 }$ ]+ B0 d2 b- X - bounds = font.getStringBounds(str, frc);# F, l1 z! v3 R ?! U @
- return Math.ceil(bounds.getWidth());
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- - w0 L: f. r6 N3 l; z0 J+ B6 ^3 K
- da = (g) => {//底图绘制6 B. Q; @+ Z) B
- g.setColor(Color.BLACK); {* V5 X% Q& z
- g.fillRect(0, 0, 400, 400);
7 S1 ~, {9 O7 f2 D2 \0 k' R4 ^$ n - }7 J( o! N9 m" G2 ^
- @5 j$ w' [2 I' `$ H/ u P0 a- db = (g) => {//上层绘制
+ S0 i$ |9 w2 H5 I - g.setColor(Color.WHITE);
4 |3 G3 e# V% ?& J( C - g.fillRect(0, 0, 400, 400);& g' K0 A) b: u1 D0 m% e6 \
- g.setColor(Color.RED);- k; ^1 s/ T c. w. t
- g.setFont(font0);3 s* w L6 m4 K x, ~
- let str = "晴纱是男娘";+ c! O8 g; _! B5 S1 S" f) f/ n0 `
- let ww = 400;
[0 ^0 U1 L% a- U! J9 V6 z# h - let w = getW(str, font0);; [/ N; n& @; @# P
- g.drawString(str, ww / 2 - w / 2, 200);
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! D' P. B% T) u/ s/ t ^6 ~- const mat = new Matrices();
$ Z% S- ?. S% L1 V% F9 m2 o7 t - mat.translate(0, 0.5, 0);8 a5 V9 T6 f' h8 m; X% C
" t8 n8 ~& H5 R3 s* T( A$ B# I# [- function create(ctx, state, entity) {
4 S' @& c' ]& q - let info = {! P; H! r) ] S4 C% K) t4 _
- ctx: ctx,3 H7 a0 A+ E: s( W3 n# w
- isTrain: false,
+ r5 S2 \0 m4 I* s4 M: X- t - matrices: [mat],
6 q) a9 [1 \# k1 Z4 T - texture: [400, 400],7 u3 b" u; W. O' M2 ~( ]% S
- model: {
/ P5 d$ E3 k$ O' h* T - renderType: "light",
, Q2 c; [3 g8 k+ |; C - size: [1, 1],
) z; P- I. |8 H" n, d7 z - uvSize: [1, 1]; K# x5 X- J8 ~- f3 h
- }1 [: e" g" J; p9 `" W1 m0 R
- }, ^: j( g8 t9 Z# ~0 [: K
- let f = new Face(info);
* t, E% ] A3 x' ~& a- k - state.f = f;8 K0 ? r8 s' p( A
- 7 g( j+ k3 V0 p( ]1 j
- let t = f.texture;2 r' T/ H/ D+ B; { o
- let g = t.graphics;
$ Z. G8 S0 T, r - state.running = true;
: ]1 g4 d1 v% L: [ - let fps = 24;, r3 a+ N8 @2 R6 a8 A$ `# O N ^
- da(g);//绘制底图- N, V+ ~# N1 M$ \
- t.upload();2 |3 l+ ~6 j# l3 m
- let k = 0;
0 @+ j* N: G2 z6 w3 l - let ti = Date.now();# H! Z% @* g4 Z
- let rt = 0;
. }4 u$ C7 e9 ?% K `2 ] - smooth = (k, v) => {// 平滑变化
8 ^0 ~) { `1 x, r9 G1 B - if (v > k) return k;
, l3 h. A, L/ t6 @1 G - if (k < 0) return 0;0 I- F y' }- p/ k* T' P
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
8 q; D7 {6 N: Y, M9 o( Z' u - }+ E3 Z& Y! l, I
- run = () => {// 新线程& i0 K. F# K4 h7 ` ~5 j
- let id = Thread.currentThread().getId();
' G# v' s4 L. s; a: k: I7 H" M! P - print("Thread start:" + id);
% R, C) I8 E$ Z - while (state.running) {
" o) X+ ^8 v$ [% N/ C5 J& g0 t, h" V! I - try {2 v# E) Y) u) D3 D ]0 f! o* O
- k += (Date.now() - ti) / 1000 * 0.2;, e. v& l3 t/ r" z
- ti = Date.now();
1 v% F* o8 O7 J$ T" i - if (k > 1.5) {
$ I" @: S, Y1 ^+ b - k = 0;1 N6 M, @# X2 r4 v/ @) p% _0 P
- }" ?6 h; n& T4 q" c# H2 J
- setComp(g, 1);/ v8 B1 c% n/ F7 T6 Q8 e
- da(g);
1 R8 F3 J! h5 ^# d. u7 } - let kk = smooth(1, k);//平滑切换透明度
; ^& p, f0 q: n+ a - setComp(g, kk);
2 l1 q& T) ~1 h - db(g);5 k, c) x6 u$ }8 I9 Y9 w; r
- t.upload();# |! {- Y$ d/ \2 W$ {$ `
- ctx.setDebugInfo("rt" ,Date.now() - ti);
! T* B4 y7 ^1 M$ H+ D; Z - ctx.setDebugInfo("k", k);7 H9 x1 N: Z' d* E9 F$ u
- ctx.setDebugInfo("sm", kk);
* ` |. M2 ^9 y3 N' Y - rt = Date.now() - ti;$ Y0 }9 t/ Q8 P; d
- Thread.sleep(ck(rt - 1000 / fps));
3 A; J: P2 H! i9 j8 M' i - ctx.setDebugInfo("error", 0)7 g* z h9 V, I: i2 S
- } catch (e) { |' E6 G! f! `' H8 H0 I
- ctx.setDebugInfo("error", e);0 u8 z" t( `6 T7 H
- }
E! B1 F+ q& a9 y - }
9 G3 Q5 V: l5 t: y3 m( I - print("Thread end:" + id);
: T* s* ^( F6 \# N - }
2 h) k4 x% N% Q$ s1 Q, u - let th = new Thread(run, "qiehuan");* {! ]- p: H1 v$ q0 E/ M; R; U. V
- th.start();! ]) u; Y( J5 `0 n
- }3 Y% G; P2 Z4 I9 I! a0 U) {
0 c9 Z2 }/ ~ i( m3 u8 T: x, b- function render(ctx, state, entity) {1 o, S: ^7 k* c8 o3 S( @5 l& p# z9 n
- state.f.tick();
9 o/ j, _3 u- `1 T3 G - }
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- function dispose(ctx, state, entity) {% F; U" u& s5 O# `. F
- print("Dispose");1 o+ o- x. ~6 _ _
- state.running = false;
) L) }* m" [3 @* H - state.f.close();% I {+ @! q) _
- }2 b/ ^( D+ z" ^1 i
, t' P2 E! s4 b) O- F8 R: v- function setComp(g, value) {
, c( @5 L, u$ Q* V* K7 V/ F - g.setComposite(AlphaComposite.SrcOver.derive(value));5 y3 ?! I, T, J
- }
复制代码 6 S9 N& O# p: I
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; q. Z, ^) P/ B5 T! E
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' ]4 e) z9 G2 Y) m/ o$ R' V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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