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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。
9 p4 G8 f( H+ G- u" Q- importPackage (java.lang);
/ _+ V) B7 Y- ^# W9 a; E8 x - importPackage (java.awt);
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0 u$ S" v ~3 ^1 t$ q& H7 d) F- include(Resources.id("mtrsteamloco:library/code/face.js"));
# B' p$ d- t$ Z) l i
% T$ P4 D7 ?3 g$ e2 A! {- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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( u4 J0 K4 R1 ^ M9 t+ F! Q- function getW(str, font) {
3 q) G( X$ R- o& \+ ?2 ?* u0 C - let frc = Resources.getFontRenderContext();1 l1 P) S" E8 H& Y
- bounds = font.getStringBounds(str, frc);4 {! P3 Z2 V7 s' R, t0 r2 `
- return Math.ceil(bounds.getWidth());
1 N0 c: t2 a, S; o; p - }
! S- a' R8 x) Y& H5 v& v* ?8 D( `
. ]" @2 n( Z* `9 u& z- da = (g) => {//底图绘制0 Q5 \8 N/ @! H' _' t! P2 i
- g.setColor(Color.BLACK);# a7 H! C0 R5 c/ V2 M) Y/ ^
- g.fillRect(0, 0, 400, 400);, M5 J1 @" r6 n
- }
# @" J0 [+ V9 n1 s: M - 3 s- O# Q& W1 K1 c |
- db = (g) => {//上层绘制0 X# J5 @" ~3 H0 m; X
- g.setColor(Color.WHITE);
; c+ }/ B8 ?5 R# i - g.fillRect(0, 0, 400, 400);( v4 H4 n$ h3 B
- g.setColor(Color.RED);% h+ R. n& G1 K5 ]: Z
- g.setFont(font0);
r+ i: E# Z" Q% \: [5 z - let str = "晴纱是男娘";
G/ P3 P4 d+ K; C - let ww = 400;# a4 R' H2 v3 x/ l5 g
- let w = getW(str, font0);
2 ^0 L0 D7 U6 g2 E - g.drawString(str, ww / 2 - w / 2, 200);# t2 m' l- H' W! B
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7 Z' Q4 N! f0 b1 U! W% k4 I- const mat = new Matrices();
2 t( m& K# u; B5 Z - mat.translate(0, 0.5, 0);
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3 Q/ s2 K% ^# U- C0 _8 _ n- function create(ctx, state, entity) {
" L7 O/ H5 k7 P) n% ] - let info = {
3 L$ n0 S& [; m& M+ Z1 D, E - ctx: ctx,2 l# w8 w, v# O9 |: t
- isTrain: false,
0 F* P8 A) T8 t. P5 w - matrices: [mat],
) o/ i; T3 _ G3 F) `/ b% v - texture: [400, 400],
* K) }3 l+ L3 \$ n# U - model: {
; a" \/ W# ~ J - renderType: "light"," e d# `/ E+ O. m
- size: [1, 1],' z/ ^; @6 h) o* [4 M, R9 p
- uvSize: [1, 1]
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- }/ X0 o# \: u% L `4 u
- let f = new Face(info);: b: g- T+ Z2 t! k
- state.f = f;
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- let t = f.texture;
* o1 t' Z- B: ]7 L4 g: E5 Q$ I) T# w - let g = t.graphics;
6 h; W* a5 K! u) n- `# c - state.running = true;
2 n+ M* u4 \1 l& Q) f - let fps = 24;! H: z" {: o7 `9 ^7 t
- da(g);//绘制底图
7 f4 }" n' N) z# K - t.upload();
2 O% @2 d5 W! q - let k = 0;
+ g/ g! q: ^- O" E - let ti = Date.now();
7 B6 M1 h2 @" v2 e! Q/ x - let rt = 0;# H8 _& D1 O$ A3 t! c4 c0 j0 [
- smooth = (k, v) => {// 平滑变化: W/ r* g3 K% y: P
- if (v > k) return k;1 W& X7 t' g/ c& U
- if (k < 0) return 0;
5 v1 r" R; _: E( _7 P4 \ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;; r5 D4 l* e& `
- }
" Z& B7 G' g/ g' o9 \$ G - run = () => {// 新线程
% s8 k/ ~" M+ x- N - let id = Thread.currentThread().getId();
# h$ h7 j- s. W0 k - print("Thread start:" + id);
6 b4 b' q, r# k* A: j - while (state.running) {
_0 C. N, v: D V - try {
, x( r9 k% b) h' `& L) Y8 V N - k += (Date.now() - ti) / 1000 * 0.2;3 H1 ?/ W" j# |
- ti = Date.now();
" h9 O* l( O" m, S - if (k > 1.5) {
3 Z9 t3 ? ?3 E% t* {( W - k = 0;/ d9 i* i7 [" `/ m) b
- }
8 o. c& H- W- W( [3 { - setComp(g, 1);
0 ]4 D3 E" }: K) @" l - da(g);3 n/ u& K0 l) W8 n: e1 \
- let kk = smooth(1, k);//平滑切换透明度6 [# L2 x* M* b% P* i
- setComp(g, kk);& w$ a1 E# `' ]+ F
- db(g);+ M2 I, F9 R* S1 Y
- t.upload();
* }1 G* s; I; w7 v: F& L - ctx.setDebugInfo("rt" ,Date.now() - ti);4 N% R1 N( s d3 G" s: ?$ ~7 F
- ctx.setDebugInfo("k", k);
2 _6 ~0 ^+ i& J& W* B. [ - ctx.setDebugInfo("sm", kk);3 U. Q5 ~) r2 U, h. |* a p ^; x
- rt = Date.now() - ti;4 s$ Z& t) D! x* L7 o- H& \
- Thread.sleep(ck(rt - 1000 / fps));
5 t/ P' ?' Q6 U - ctx.setDebugInfo("error", 0)
, r+ i! F% R; d4 k. H - } catch (e) {
+ x' o! V! R4 l0 ~9 ~$ v, m; b - ctx.setDebugInfo("error", e);
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- }: v% W8 [( g" P
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");- j# y$ @. t2 s' E, {$ F7 G
- th.start();, Z. w, S* B k: z
- }) I. O4 e& C$ `
- + b G3 j+ q1 I! h$ E5 j4 H; W4 W$ G
- function render(ctx, state, entity) {* I" r) `8 H! ~; M
- state.f.tick();. V) l/ m; p8 f; O
- }
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. O* g$ J! w$ y- function dispose(ctx, state, entity) {
$ J9 T3 g/ Y4 I7 }$ U5 c; a - print("Dispose"); J, w% T W" G9 `! L1 k
- state.running = false;
, b# B" _0 |; n8 P( l0 S& @ - state.f.close();# B5 t5 D2 y( @+ [- S- P) k
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- * O# y+ o6 ~& X9 k
- function setComp(g, value) {
7 X9 D) b; y9 y( l9 w - g.setComposite(AlphaComposite.SrcOver.derive(value));
+ ?$ } |$ _" A - }
复制代码 4 }3 b; T y7 T" 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。2 ~, J+ a+ g) Q, V- ^
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7 ^3 I$ E8 a# a( \/ ^顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下). x. i0 e7 {; A0 A6 A
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