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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。* S1 y& C+ R, ?) y! g& @
- importPackage (java.lang);
! k& [( O, h$ h7 m$ m5 B2 Z! h - importPackage (java.awt);/ [3 S' ^' {% F
, \( ^! @" W, |; B+ a$ h) [- include(Resources.id("mtrsteamloco:library/code/face.js"));
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4 k7 r0 T7 C. Z$ F( ^4 H6 E. u- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
% @0 i) y7 n% e) t! Z
( c; q& A2 q+ u- t1 r& b- function getW(str, font) {6 `/ B( Q) X @0 u4 {
- let frc = Resources.getFontRenderContext();
% |1 w, z! ^) v3 _# E( T; w - bounds = font.getStringBounds(str, frc);& G; ~4 O; r: m4 W9 v" y. c' Z
- return Math.ceil(bounds.getWidth());
, @# _0 K) ? B& S( |% M ] - }
8 X- G9 a9 T, q. {
5 r9 K S* @3 [& q4 N- da = (g) => {//底图绘制1 n4 a1 j& X4 i: W7 T2 g3 w% O
- g.setColor(Color.BLACK);1 C M8 d: `) C) t" J+ Q( ?
- g.fillRect(0, 0, 400, 400);5 `: B) Q9 I) A5 [# I
- }
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2 B2 i, G6 i7 s6 I- db = (g) => {//上层绘制
' z4 V8 X& p4 N# O( u% j$ S' s7 g - g.setColor(Color.WHITE);) q- D( Y9 N' P: w5 f S
- g.fillRect(0, 0, 400, 400);
2 G5 Z5 ?$ u5 d9 u - g.setColor(Color.RED);
& |) ^! ~+ L& H& c8 r - g.setFont(font0);
' l- {: H/ g3 d4 f+ L% p - let str = "晴纱是男娘";- b8 R1 K( D. h5 n E8 n
- let ww = 400;( m4 l& q$ e7 `: C3 }: E
- let w = getW(str, font0);4 ?, p) H. H, Z U1 i1 a& v3 k
- g.drawString(str, ww / 2 - w / 2, 200);
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- 6 ]3 `# L+ A" ]: ?9 B" J H
- const mat = new Matrices();
' P/ V+ }( H: T# J& b4 \( L9 E( W' G! P - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {; H! h/ c1 f# ^6 L
- let info = {8 S0 {2 z5 n: m% _9 A
- ctx: ctx,$ S# j4 o, Q8 i6 U- t" N
- isTrain: false,' K* b# p1 |& G6 S
- matrices: [mat],
' W/ T9 | z$ I - texture: [400, 400],
6 F- }) v5 _$ P8 V2 [ - model: {
8 P0 S1 _( p- f$ u+ D - renderType: "light",
( k4 L; W* ? I, p - size: [1, 1],
: K; U; ^1 Z- [5 T9 D7 p - uvSize: [1, 1]8 r9 L' I& j8 B+ D9 V1 t+ b4 W
- }
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- let f = new Face(info);
5 l7 L0 E( f' N - state.f = f;
1 t' j/ y; D7 D+ X0 g: J! {
8 H9 U1 N+ z0 s- let t = f.texture;
$ B: y& n3 R- V. H - let g = t.graphics;. d7 h( M- r0 X1 n4 X9 [
- state.running = true;
3 h1 e# V- s% P8 f M - let fps = 24;+ V5 L0 K( N3 g
- da(g);//绘制底图/ L" u/ p0 Q B, L& e
- t.upload();
" q- `0 N2 S4 E( h$ D - let k = 0;
" `* Y' g1 {: z - let ti = Date.now();
. E- y" P, s) C6 o6 E0 G - let rt = 0;9 P+ I/ d8 t7 P% ?$ a- v. d
- smooth = (k, v) => {// 平滑变化
% O- @( b& H+ T& Q, E8 A9 z9 A - if (v > k) return k;3 S& q. P; x# o8 L" B
- if (k < 0) return 0;
6 t6 I! ]: K( T# ~& z' |' X - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
( U2 V% z# _3 y- M - }
& o4 C% D3 e _0 x) @' h8 U - run = () => {// 新线程
2 x: H% u0 }! c) h6 f - let id = Thread.currentThread().getId();1 H3 {& D- @3 H7 a% f9 g
- print("Thread start:" + id);- C3 K E* A, h% D5 J4 L
- while (state.running) {
3 R, D" q0 a4 \) S# d6 y - try {
& n( |, q/ `; X* I/ \ C/ F - k += (Date.now() - ti) / 1000 * 0.2;7 B4 M3 X @% E9 k2 c. i
- ti = Date.now();
* N! u s) f5 w - if (k > 1.5) {
+ K7 }: }) p0 J& @4 F' p- d - k = 0;
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- setComp(g, 1);; m7 ]; ^) U" a$ [" |8 P( G
- da(g);
5 Z9 }7 Y8 Z8 I: O( ~( P - let kk = smooth(1, k);//平滑切换透明度
5 v4 E0 F2 I" R - setComp(g, kk);
8 S6 x$ s) ]% H - db(g);
( K* r, q a; H+ N8 O2 M# ?+ k - t.upload();+ }) s2 a4 R Q+ z0 @4 D
- ctx.setDebugInfo("rt" ,Date.now() - ti);
: \- ]( ^& A- n& C - ctx.setDebugInfo("k", k);4 I0 c- ?: v3 g/ C% e' s
- ctx.setDebugInfo("sm", kk);4 w5 m2 M) \1 k. U# H
- rt = Date.now() - ti;
3 b( W" b4 c% v; Z' D) A8 Y - Thread.sleep(ck(rt - 1000 / fps));
, T8 n6 \# V% b7 C( u7 v6 x - ctx.setDebugInfo("error", 0)* v# `1 a D4 }$ w$ @8 d# i$ S
- } catch (e) {$ M0 P/ t: b' b' A) I1 T
- ctx.setDebugInfo("error", e);
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- }
* ~4 ]% D4 _! f" l - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
/ T, O. A9 h, U' f4 j. A - th.start();) r( Y1 w# h, K; D
- }! {1 Q9 E) A/ @& m
9 _4 p" g: ^/ b- function render(ctx, state, entity) { P3 `! m7 m* D; b5 H& o' P: r
- state.f.tick();% @ S9 U- a9 o2 k
- }- |3 w( T. P1 n
- 7 N9 @' v9 l* }$ a; ]! D, f
- function dispose(ctx, state, entity) {
8 n6 U0 D1 ~6 j5 f4 V - print("Dispose");
+ x% e7 B4 I1 d1 L' z - state.running = false;
& F" W+ ~5 T2 G( r3 v - state.f.close();% z. P; r" j& L y1 B, x
- }
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! W' `6 [' S# W- X0 G! S. p; D- function setComp(g, value) {
, U# o/ ` r# _6 z - g.setComposite(AlphaComposite.SrcOver.derive(value));
4 y0 {* P/ d; ` - }
复制代码
+ f% U2 J/ N& H- X* m5 e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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