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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。
* b1 k6 O# z5 R0 l$ N- importPackage (java.lang);
4 W& {) v' ^# B- s p# p# n: { L - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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5 K! n/ `# q" Q4 ~* ?- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ |1 |* U; [ S
- - Z; f$ T' m% Z1 p! Z6 g
- function getW(str, font) {4 ^8 Q7 O$ f1 F
- let frc = Resources.getFontRenderContext();
% `( ?5 E9 E# V - bounds = font.getStringBounds(str, frc);5 U4 D3 p8 Q3 `! a
- return Math.ceil(bounds.getWidth());0 R D$ ]' Q1 {9 W
- }! s/ g1 p' _, U: q
- " Z' v' e' t g
- da = (g) => {//底图绘制
% F6 [$ x3 B( B' [ c# K" k# i - g.setColor(Color.BLACK);
, c- J& N/ L. e. F- L1 A9 i - g.fillRect(0, 0, 400, 400);
: M0 z4 b& [9 B: X) f7 F' E$ G8 K# K, c - }
9 \9 P A2 H+ w% ` - 0 w' T3 B; M1 o" @) ?* T
- db = (g) => {//上层绘制
9 W* ]: `6 I9 q - g.setColor(Color.WHITE);
3 L; W0 `. q. j* c' E' E8 A: r - g.fillRect(0, 0, 400, 400);5 l' Z& ~) d- N+ Z
- g.setColor(Color.RED);
5 [( \; Q# g# R: q0 ?, K( } - g.setFont(font0);
! K3 `( M4 t( O( s' x+ ] - let str = "晴纱是男娘";2 E$ r* p6 y+ K6 N
- let ww = 400;
( O q" g6 F) _; L: ? - let w = getW(str, font0);
4 ]2 I4 E( k- U. |/ }* q" }1 p - g.drawString(str, ww / 2 - w / 2, 200);
! A, K. |: v% l Y# G - }
8 [1 j; t9 \5 M" F X0 |
8 H4 c" _+ F) w7 \4 _! J6 y- const mat = new Matrices();
3 B0 q4 n8 s4 { - mat.translate(0, 0.5, 0);5 U2 E% k! X* k+ o9 C8 U0 d/ e
4 M9 [+ F' {! V+ |- _- function create(ctx, state, entity) {. C6 F& M* q) s; ]& L) L2 p3 P% |
- let info = {
! B. N- C3 J9 I1 E: e; g - ctx: ctx,7 V* R$ n" P# Y6 d) c
- isTrain: false,# x* m3 G. a; @' {2 o7 r8 I0 m
- matrices: [mat],3 n- E! Y9 H9 L; y
- texture: [400, 400],3 o% w5 c; W; V& z+ s
- model: {
: ^ k9 g8 Z" |, V! o3 T8 e - renderType: "light",6 k; c3 I! g- x8 n9 `5 b) n
- size: [1, 1],, D, X& j4 X& j) U Z# n# J6 Q
- uvSize: [1, 1]
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- }/ N- ~4 e0 T& k7 R
- let f = new Face(info); B) U' V4 Z. b/ L; P# F8 K' z
- state.f = f;
3 }+ H" z( \5 Z
* G/ q! {7 v- _0 D& L8 t( ]! d! V9 ?' O- let t = f.texture;
2 J% ?: {% u3 E4 n1 J$ t - let g = t.graphics;
, a$ x/ n$ w4 d" t - state.running = true;
2 \7 _) ~$ K1 l+ B& V - let fps = 24;* ~4 A# G0 l6 ?( w. U$ g' i
- da(g);//绘制底图5 R* i. [% G! k" g# f' W
- t.upload();
% m# j+ O+ k0 X3 p4 Q; t5 S. F - let k = 0;
' J1 p& r: f8 [! L3 z - let ti = Date.now();
9 x2 c0 b0 K" g - let rt = 0;
8 e! L5 A5 |; h: N3 |( ~/ b - smooth = (k, v) => {// 平滑变化
7 e+ ^ g9 ]5 M# s P, i - if (v > k) return k;8 T5 Y( _: U$ c; y8 f/ T
- if (k < 0) return 0;
4 ?/ l% a0 @% z - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;, @8 W4 G+ G+ u8 M5 g5 N
- }4 _; L) s2 k: d1 R+ _/ X0 u
- run = () => {// 新线程& T' B3 i5 T+ F& j# T8 M5 I( V
- let id = Thread.currentThread().getId();8 Q' }# F& H4 ^2 D! s
- print("Thread start:" + id);. Q* f" O( L9 F. B8 q6 m; N7 `
- while (state.running) {- h& O! a: u7 B m& H' Q6 z! Z
- try {
( l8 p }9 l9 X) E5 e V# ] - k += (Date.now() - ti) / 1000 * 0.2;3 D; e5 J" ^8 z5 v) P
- ti = Date.now();& H4 z+ N9 e+ t$ u
- if (k > 1.5) {
, k- g7 | Y8 Z+ |" z' d6 I - k = 0;6 W' b/ |5 L: W1 Y- `
- }
. h& F6 ]& p% A$ h - setComp(g, 1); K# {/ ^, x0 U1 K- z, V
- da(g);4 t( A) ~: w, o: e* C5 R9 ?+ i
- let kk = smooth(1, k);//平滑切换透明度' x1 p0 ?3 R, K
- setComp(g, kk);$ P* o0 a- T) Z/ ?
- db(g);: g! E; |8 X6 d. O, @# V$ a7 ]
- t.upload();
" d6 \$ @ n9 K6 h) S N# E9 M - ctx.setDebugInfo("rt" ,Date.now() - ti);1 R! |$ g5 O9 m& y$ T9 |* D
- ctx.setDebugInfo("k", k);* `6 q, [; `1 V4 m" i- \- [+ c
- ctx.setDebugInfo("sm", kk);2 B) r) {8 t9 b* C7 ?
- rt = Date.now() - ti;
: a# y4 q- Q6 l7 Y+ X - Thread.sleep(ck(rt - 1000 / fps));
' ^; i) Z# q4 ~' u' j1 G - ctx.setDebugInfo("error", 0)
3 o- u5 |. a- @/ R- N0 s* M - } catch (e) {) S( i4 n) F A9 A
- ctx.setDebugInfo("error", e);) Q0 C0 y6 f7 n. r9 Z
- }; S8 {; b) {0 h7 U7 R. N' p9 x
- }
* u! j# L& Z" Y" N& e& o2 P - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
+ Q- b q; y" j% ` - th.start();$ w% P: _5 d; {7 N4 \; r$ _
- } g% ]3 X: e4 ]& R P6 Y+ r& I
- : K2 D- Q! p5 h# i) [- i/ `
- function render(ctx, state, entity) {' f8 O6 X$ \8 r9 W0 ^
- state.f.tick();
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- + f: ?: h2 U" u2 z$ S& w6 f7 M# r, f
- function dispose(ctx, state, entity) {
9 [' w6 _3 N) a% X2 Q3 |$ j - print("Dispose");
3 R0 m8 }( x- u$ J - state.running = false;
- s# l: v. V/ i! _9 u$ } - state.f.close();- y& R/ }5 x- X7 o. S5 T; Y9 Y1 P
- }
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7 b( {0 H' r1 F W7 |- function setComp(g, value) {! h% x% s8 C- R! b* _1 J* e6 Y2 @
- g.setComposite(AlphaComposite.SrcOver.derive(value));
' z1 [0 x( F( P- N5 P) p0 G! K - }
复制代码 : x( F0 U" s# S4 H; e4 g
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。) a% ^+ G' U* U8 |4 |
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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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