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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。
5 U! `6 u: y0 U1 j- importPackage (java.lang);
* {) `3 W% @. e6 Z/ F - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));' C& v% }( u2 a" g
1 R) X9 {% @- [' M5 w. n- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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2 D g/ Z) `; c- Z8 d- function getW(str, font) {
% j( L* O0 H1 m1 k - let frc = Resources.getFontRenderContext();) M' B) o: V c+ z8 C/ O" m5 b- ]( e
- bounds = font.getStringBounds(str, frc);
, w$ d- R3 r7 ^" \( J - return Math.ceil(bounds.getWidth());
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- 5 t+ @$ T' n E
- da = (g) => {//底图绘制; p, {7 g/ F7 ^/ K' J' U" T" F
- g.setColor(Color.BLACK);
- ]# `* l9 g! v3 t - g.fillRect(0, 0, 400, 400);
$ Z, q- g% L- N( s3 {0 b; R9 p - }
/ l+ I( K' I$ F' n - 4 c9 b/ y' p( O8 j' k, u1 Y0 {2 |
- db = (g) => {//上层绘制
0 H6 D4 f- T/ i# I9 F: |9 m - g.setColor(Color.WHITE);
8 G3 |7 E t% Z - g.fillRect(0, 0, 400, 400);
% B l0 E1 L* ?5 B1 z4 {# \& m - g.setColor(Color.RED);$ |5 j4 s7 i/ U5 e% [
- g.setFont(font0); J* [# T$ W' |! e
- let str = "晴纱是男娘";
, L. ], y( X$ O& a - let ww = 400;
$ B! ~$ q. K2 Y - let w = getW(str, font0); a( @% Q0 F( X2 C5 v2 x% R
- g.drawString(str, ww / 2 - w / 2, 200);
4 o& C' ]+ x3 H! E. h - }
# G1 x0 q$ `7 x6 v- H
' |- j( ^1 |7 a8 _; S- const mat = new Matrices();
! {# i% X' f( Z- ]9 [2 q: @' e& [ - mat.translate(0, 0.5, 0);+ [7 v8 I7 ]# ~$ x
- . K1 Y9 |; |* s# x0 P7 L
- function create(ctx, state, entity) {! v Z/ B% o' P+ P6 Z2 a- L5 K0 v
- let info = {
/ o8 r: B1 v9 n* P" O4 W - ctx: ctx,
" r" v; n8 J I: l - isTrain: false,$ ~1 S# R5 Q, Q9 b2 X) g
- matrices: [mat],( G' t0 f" ~9 Y5 P6 S
- texture: [400, 400],' g F G/ D- ]% q4 c; s- J3 n
- model: {
" P. ]; _: y7 m: |# l* H: F - renderType: "light",& @1 k; _1 W" A( R( J
- size: [1, 1],6 s* X2 b$ \! U6 }; m# Z: v
- uvSize: [1, 1]
1 P: S1 B& C& W6 T - }, v- t( y" d9 A6 f
- }
; H6 ^) y1 O" j& r0 l8 O+ o - let f = new Face(info);$ ]' C2 A* b9 @+ ` W
- state.f = f;
) I$ B! ?% f/ h9 L, r - 1 r0 q, i7 o' M9 G
- let t = f.texture;
& z: }6 a( f0 z' Z3 e! i - let g = t.graphics;
* P' M& Y8 `9 Z4 ^8 | V9 ~ - state.running = true;% W p% I( Z2 t
- let fps = 24;
9 T% E; D9 C7 g5 n! w; c - da(g);//绘制底图
1 o1 @( q: ]- }% x - t.upload();
5 [# r9 H$ I) y8 J& f0 R - let k = 0;6 R: B# G0 ^( H c
- let ti = Date.now();+ C' u1 P0 v8 ~4 y. l8 |% [
- let rt = 0;. J# Z, Y+ h/ T- H) [ A- D0 X
- smooth = (k, v) => {// 平滑变化
, c& m: j9 U4 t7 H; t9 Y) f5 \) B - if (v > k) return k;$ e) i }2 |) l9 J5 Y U
- if (k < 0) return 0;' O P/ }; J0 m( W$ C
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) o9 S! x3 t4 C- k3 Z
- }5 v' {5 l: \ A# ~: h/ Q
- run = () => {// 新线程, [3 ^5 u; `/ \% s
- let id = Thread.currentThread().getId();# p* a- K6 n$ C
- print("Thread start:" + id);2 b& d7 d! e k$ R7 j
- while (state.running) {! X1 X# Z& s0 R$ T
- try {
4 ]/ G, \" C7 ^" i1 k - k += (Date.now() - ti) / 1000 * 0.2;
% F: V7 m; U5 m" U% b, U - ti = Date.now();
3 W6 _$ S% W7 ~- V" B% t7 Z - if (k > 1.5) {# H# r% D& A$ J0 _; C
- k = 0;0 V7 D- c: A9 y: y
- }
4 Y, T/ \, S K& R( ~1 J! @ - setComp(g, 1);+ B. `2 K& z* f0 t8 x7 ^
- da(g);( i( W. E3 }: }3 ^) r9 B9 e% Y' k
- let kk = smooth(1, k);//平滑切换透明度
% Y; x+ j- O- I! ]& M9 A: v: E f0 N8 M - setComp(g, kk);' b* M1 S$ [. P
- db(g);3 x! U/ j. x* d7 Q# {
- t.upload();) r# ~ N) A8 P6 G( G- h
- ctx.setDebugInfo("rt" ,Date.now() - ti);+ _% a6 g# Z0 o8 H+ h: S9 p8 ^
- ctx.setDebugInfo("k", k);
) Y* M& P# X& \7 \0 j# n - ctx.setDebugInfo("sm", kk);+ g/ J* z+ _# ~( V2 a q
- rt = Date.now() - ti;
1 [+ h* q ~# ]- o1 Y, F. e - Thread.sleep(ck(rt - 1000 / fps));
1 F+ J# t x1 v. K$ f3 W# H! z - ctx.setDebugInfo("error", 0)- D$ A" \# h- `: C
- } catch (e) {
$ m7 c. N8 q& J! h - ctx.setDebugInfo("error", e);
- ? ?& v! |' ? - }
n8 `. O$ w8 F - }" w) L- ^; L8 ^
- print("Thread end:" + id);
% w' g0 \5 B* {1 g ]) D. P - }
& S6 U$ V/ e; B5 Y8 T! N5 T- | - let th = new Thread(run, "qiehuan");$ ^! {' x) V4 d
- th.start();
3 Y8 R7 B( e' F* \! |8 N& C) s - }# _4 ~" K8 T0 ]9 J' Z
- 2 M0 b' u3 Z9 i/ d
- function render(ctx, state, entity) {% A$ B6 \/ M3 h9 |1 l
- state.f.tick();
$ A% }1 |7 o, j8 z' z - }; ~0 A1 l4 ?6 k" Q0 L
2 T" e8 A' q7 q- b. b- function dispose(ctx, state, entity) {/ [5 @& Z# @0 r' E
- print("Dispose");3 t/ \$ X" X* O" `; W8 [5 K
- state.running = false;
! M6 Q$ o$ b0 t5 G- ` - state.f.close();
1 H1 V' |4 }; A$ o& o - }
# o) h8 l+ i6 [% R% t3 h
2 O7 ^3 ~" S% j' e- function setComp(g, value) {
% S6 }; E+ `- b - g.setComposite(AlphaComposite.SrcOver.derive(value));
5 P. a" e; i3 s) j - }
复制代码
* n; Y: j8 b* s6 X0 I2 U& F* n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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- q) [) Z7 o3 D( V5 Q/ I; O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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