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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 w: U' P ~9 q: M; C7 t9 N- importPackage (java.lang);
2 p$ j E8 [0 i( Q+ R2 T( J9 ^ - importPackage (java.awt);6 W# W5 n5 ?9 k! b9 \" a c7 g
+ C8 V8 @9 q& p# D* S- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 m3 y! N: H6 N; ~ ?- x! w" y
- 1 f, `) z4 G$ O0 _( b0 ^( x0 X; v
- function getW(str, font) {
. o q# |' c- s; ]4 v5 x- ]6 G - let frc = Resources.getFontRenderContext();9 ]& T% F0 p0 w' o, A
- bounds = font.getStringBounds(str, frc);
% a# G* d- H9 F+ E - return Math.ceil(bounds.getWidth()); p. @3 X( |1 N" z1 ^
- } i3 I- G" |! B7 z9 h* U8 g
- + f1 b: T) C& D8 t8 _. {; a. y0 o
- da = (g) => {//底图绘制0 G% a% o' J; P4 H
- g.setColor(Color.BLACK);
0 ^) [0 S" j( I7 b7 A3 b4 p' A: d - g.fillRect(0, 0, 400, 400);7 {8 ?; ^0 T" d; S; a. v
- }4 j; e g1 s" h/ \
4 h3 e4 w9 l. V- db = (g) => {//上层绘制2 W6 G( T; e3 f% z* _/ d# S
- g.setColor(Color.WHITE);# Z) G+ l- t. i
- g.fillRect(0, 0, 400, 400);6 }& _& F# s; ]
- g.setColor(Color.RED);
) F& H+ j0 J/ D) ~" Q q( g - g.setFont(font0);; O# \! {- v5 C3 x& Y Y
- let str = "晴纱是男娘";3 E& N; }$ U" \! f; C& c7 k4 ~
- let ww = 400;
$ u; B/ B3 d: u# q+ V% q( x - let w = getW(str, font0);
2 Z9 e2 K6 p0 a% Y! T - g.drawString(str, ww / 2 - w / 2, 200); a. e3 G7 A8 L Y( U, @8 u
- }
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- const mat = new Matrices();
1 f% w) {# G/ g3 F3 P - mat.translate(0, 0.5, 0);
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* I0 _- }. _$ R/ Q1 A* i& Z8 c- function create(ctx, state, entity) {
5 q! u$ s" a# b3 X* E3 a - let info = {
. P# O' ] X7 g - ctx: ctx,; w. F0 n+ i) a2 { G6 {) k
- isTrain: false,
2 t+ z. Z# j( K% G - matrices: [mat],6 [3 j1 g! y" U4 v& E5 j
- texture: [400, 400],& o) x" v" j2 }4 H. I, U- h7 [1 z
- model: {: R1 g y; V- u7 T5 z- W! O
- renderType: "light",
4 Q4 M, r' F, k+ ~ - size: [1, 1],
0 M4 W( C' z+ J% @ - uvSize: [1, 1]! `/ {& K% p! x9 R; G; e/ g1 j
- }
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- let f = new Face(info);+ J' F( I9 G# B; }& M# f; O# E$ e
- state.f = f;
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- let t = f.texture;8 E: M5 C Q+ ~* j
- let g = t.graphics;, w" w4 N5 C; M3 u
- state.running = true;1 b0 |0 r7 ~# C {; L
- let fps = 24;
9 a% {9 ^7 ?# H9 q, @ - da(g);//绘制底图
7 H+ z2 N9 T% q7 k - t.upload();
7 K( S4 ^& Q# S( T* F, b$ B; e - let k = 0;
: Q: G @7 o0 h+ ]/ P - let ti = Date.now();
/ w7 c) p3 }8 `, o x; o - let rt = 0;
/ a4 a: _( S% M$ D - smooth = (k, v) => {// 平滑变化
8 {7 V& x7 D2 v% \' P8 a9 |5 G - if (v > k) return k;, C- c. v. q N- k9 I" }& ?
- if (k < 0) return 0;
/ C' A; L, @7 b5 K6 U/ o& V - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
: v7 E# G# p8 Q4 D2 }$ z! \ - }! [. G& Y9 n. [' s6 C) R8 V
- run = () => {// 新线程
! j# O4 r9 f& n - let id = Thread.currentThread().getId();# M5 y5 W" w3 h
- print("Thread start:" + id);
/ i8 \& m9 ]# T3 H& E* f - while (state.running) {
# Q4 B7 Q6 H& I" j; Z7 U" y - try {
$ {) W2 j' r% ` - k += (Date.now() - ti) / 1000 * 0.2;
1 f2 C1 D$ }7 E0 n3 D+ a4 S+ v+ p - ti = Date.now();
9 J4 ~; V$ W; X$ U) n - if (k > 1.5) {6 Q5 G+ O$ s6 o \7 {6 o
- k = 0;1 e" ?, h" r$ t2 n4 A8 }8 V
- }
( x6 h! e8 a# K9 _3 l - setComp(g, 1);$ e s4 b6 o5 U% P" l: [2 f
- da(g);
6 s7 t) F7 C2 W8 G9 E - let kk = smooth(1, k);//平滑切换透明度" ~- M" K: ?, b0 V8 n
- setComp(g, kk);1 x3 e. Q4 u- c1 d% \0 P0 b8 T
- db(g);$ M) V+ P' V* F
- t.upload();0 \7 t2 _9 i7 l2 A6 i0 {
- ctx.setDebugInfo("rt" ,Date.now() - ti);
/ ^* ]3 W3 R- m! I - ctx.setDebugInfo("k", k);* S/ Q$ c* ?% ]1 [- w
- ctx.setDebugInfo("sm", kk);
# f! v' d; i# H- `$ R: t - rt = Date.now() - ti;
, h4 z& U7 }* H - Thread.sleep(ck(rt - 1000 / fps));0 k L. m. \$ h
- ctx.setDebugInfo("error", 0)+ D9 O0 S* F/ t; }' q1 Z2 [1 a
- } catch (e) {
: y! T; u l. P% i - ctx.setDebugInfo("error", e);
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- }0 c T- u. m ?0 p5 [6 R& e; N
- print("Thread end:" + id);. i% D- ]- p9 u( r! s! @
- }* R i7 s) @( ^, ~4 ^3 M, }
- let th = new Thread(run, "qiehuan");3 m( ~$ r" \& S. \, c }( _
- th.start();
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- * ?2 C- T: z4 U q) k
- function render(ctx, state, entity) {
. V, ^5 m5 W/ o3 B. r3 N/ F - state.f.tick();! t' \& L! L& v; a7 H3 Q
- }
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- function dispose(ctx, state, entity) {" M# T0 r- @, T. V- l* L6 }" c. F
- print("Dispose");0 \+ l3 e' L. d* ^ j1 R; O
- state.running = false;
2 d4 e6 I2 G& z4 g2 m O/ L - state.f.close();
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- function setComp(g, value) {. I) V8 h* \- s+ c6 I
- g.setComposite(AlphaComposite.SrcOver.derive(value));* m8 f9 j. I4 d, @' a; W2 ~
- }
复制代码 6 }1 a- a0 c9 E( 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。3 F3 Y9 G9 z. m4 ]9 L# V y- }% z
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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)7 ^* l. J/ I* V: I( V
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