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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。
) J. l& Z2 r$ W' H* z$ _; W) G- importPackage (java.lang);: z0 V. E9 b0 |5 u
- importPackage (java.awt);% @! @# L+ {0 T/ }
- . ~3 E5 c( O9 @( n E5 u
- include(Resources.id("mtrsteamloco:library/code/face.js"));" h. L* u# H- H; X
% {, t8 ]& m3 ?' ?$ j! f- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {( {3 I' Y4 p6 o- `: ?% N$ X4 K/ f
- let frc = Resources.getFontRenderContext();$ S* l$ z: g+ v+ s# h T6 O0 \% g8 e
- bounds = font.getStringBounds(str, frc);
; ` @7 M1 v4 b" s$ L8 r, S& [ - return Math.ceil(bounds.getWidth());% I* u& q( x7 O8 c/ ?) C
- }& ^ p9 E7 B2 T) m5 K
: V h2 g" Z# N. u6 }" M( {+ D- da = (g) => {//底图绘制& P: P, a4 h5 N2 k# a; A
- g.setColor(Color.BLACK);0 L4 J% ~3 F2 `3 b" }# V0 a" H* c
- g.fillRect(0, 0, 400, 400);
, J5 M/ E9 p W - }
/ z0 Q" F( R( ` - 6 q' Y7 }/ D' G- z. k4 e" u
- db = (g) => {//上层绘制6 ~3 [8 O1 G7 [' E+ @. F& \) A; H
- g.setColor(Color.WHITE);
( |6 s1 j3 ~' E } - g.fillRect(0, 0, 400, 400);+ ]; y' @& C* Q% q& g: P1 M
- g.setColor(Color.RED);
7 M, D. [5 P: n3 K( }" ^0 z - g.setFont(font0);
: E7 j `# E- Q, p9 ? - let str = "晴纱是男娘";
6 _8 o- a! t* H5 M* n0 \. Q - let ww = 400;1 |' e6 j3 J) ], I
- let w = getW(str, font0);6 O- M5 u; y8 |5 n% ~: N1 T d
- g.drawString(str, ww / 2 - w / 2, 200);/ J* r; J! ~/ Q G+ s% x' D% U
- }
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- const mat = new Matrices();
' `" w1 ]5 N7 D0 P - mat.translate(0, 0.5, 0);/ G; N1 }9 f6 Y0 k+ S; V
- * r+ G7 l/ N/ o& i2 a# V
- function create(ctx, state, entity) {* }' h6 s, a8 m( X; w$ O2 M2 d
- let info = {
! q$ U; @1 @* p - ctx: ctx,
) f* J7 Y7 M5 { - isTrain: false,
) q8 n7 g- ~0 G% E9 P5 D8 t - matrices: [mat],7 E3 I* m9 L2 j8 W
- texture: [400, 400],- A8 C7 T/ C8 i, l
- model: {
- a1 q \. g8 ^5 l; a' ` - renderType: "light",
2 p+ s; u+ H# k: R" x V1 o - size: [1, 1],
6 k' c; {, [) B) P - uvSize: [1, 1]' R* H6 p& w) J2 }8 u
- }
; c5 u# y# U; ?, M: S - }
: y2 `* d) k* ?$ }0 ]: }7 h' W; k - let f = new Face(info);0 y g$ C/ j3 i7 I
- state.f = f;
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- let t = f.texture;+ `) M7 ~. h7 c4 m* s Y
- let g = t.graphics;2 o: l$ N3 c1 W' \5 Q# i
- state.running = true;' [* p$ [" w C- l! y+ V" \ {
- let fps = 24;! e9 V, _0 t( G' g
- da(g);//绘制底图
0 {: q4 i k4 w% \1 T, u - t.upload();
: {3 V5 c. N: m, g8 H% J$ G' B - let k = 0;
. z+ Z; d) i" Z5 T i, N - let ti = Date.now();) D+ A$ w+ N& h6 e0 B" C' S1 H/ I
- let rt = 0;
- D' p& ]# @3 Q- n: Y - smooth = (k, v) => {// 平滑变化
/ E7 ~8 X( C, I8 ?5 a - if (v > k) return k;. R! `0 w# r- n5 K: Y/ G/ b
- if (k < 0) return 0;
- E; S3 M* P L9 k0 `- _2 G8 i - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
% x( f0 Q. T+ e; i - }( I. ?# Y# O- R* s# {
- run = () => {// 新线程
/ U [. {9 v4 H9 b' N- Y2 w - let id = Thread.currentThread().getId();; \* D/ O$ _* @3 W0 w
- print("Thread start:" + id);
8 ]) O! C+ v3 h9 Z0 O - while (state.running) {6 }. Z) J' m" O; m6 ^- K
- try {6 S( w9 N+ y( u8 \& n3 j& ^( K
- k += (Date.now() - ti) / 1000 * 0.2;# _" R! u. R0 N/ R0 l
- ti = Date.now();
, X. D' r! g" {+ ^ - if (k > 1.5) {
5 e& e4 H# d/ G; H& |/ X3 E& T - k = 0;+ F( J% s# z/ P( k' ~- F0 Z
- }. o% S, z. ~( L$ |( _
- setComp(g, 1);
) o4 L, h( T( {& O/ p. r7 u - da(g);8 c9 V( E5 E" R- r9 r
- let kk = smooth(1, k);//平滑切换透明度4 @$ a2 @4 s3 l5 Q
- setComp(g, kk);
1 X2 Z2 l" ]) X0 u9 @2 G - db(g);- _, {* j( X& ?7 W$ W( t+ X- F
- t.upload();- L$ n1 ^) r4 _! o- l3 |
- ctx.setDebugInfo("rt" ,Date.now() - ti);
$ b! v* H, T3 k - ctx.setDebugInfo("k", k);$ i* h8 }- c/ |' G
- ctx.setDebugInfo("sm", kk); r* V# |4 u9 { b1 u
- rt = Date.now() - ti;
; f" H/ ~) j( I9 f3 E+ q" ]& _ - Thread.sleep(ck(rt - 1000 / fps));( f6 E: ]/ f, d; g/ ]
- ctx.setDebugInfo("error", 0)
! X' m/ j4 ?2 ?1 \7 P6 K4 q8 \3 F( h - } catch (e) {
/ `! C' j; g5 f% b# z - ctx.setDebugInfo("error", e);: u! X( v- m% d
- }
( T9 J6 |0 w7 s* ?: i - }
9 J4 }: Q8 ]* o9 U7 ~ - print("Thread end:" + id);1 {% a; d3 ?5 \9 N* b1 e& ~/ A
- }
7 O( L' R$ G9 s# C- K7 ~; v5 g - let th = new Thread(run, "qiehuan");
* J V+ x# R0 D$ l5 \ f - th.start();+ j- J9 \, t5 q$ l$ h
- }8 j* F" t3 ?" C7 H3 ?, o# G# _' y% q
- - Y( M) p, T$ O$ K4 A
- function render(ctx, state, entity) {
( T& y& [, ]% W9 a - state.f.tick();
) F6 z1 ^0 Q% L$ W4 c - }
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- function dispose(ctx, state, entity) {/ Y1 \6 D: H, ~# e$ B* f
- print("Dispose");+ U \5 a( s* @; k) S
- state.running = false;9 c' s# j9 s# M1 W
- state.f.close();
+ E/ E# l; i3 @ - } E& r' a' t* T$ W: }+ @/ f- u
- + s. e( E- _8 ^7 s% w) b3 v
- function setComp(g, value) {
+ T1 Z; c* |; R" f* y/ r0 L3 ~ - g.setComposite(AlphaComposite.SrcOver.derive(value));* j, u2 v0 y; K/ R! M: H
- }
复制代码 % p- X7 y: u: c) t5 @( K
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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