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4 l4 t. | K; S, ?" |8 G$ b3 Q1 c$ D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。/ p: w- w7 j" A3 \7 i& `
- importPackage (java.lang);
& r( i$ w2 |* Z) {& X - importPackage (java.awt);
M% s1 g: E7 T& O% U2 V8 p% E - ' Y' O h" d5 Z
- include(Resources.id("mtrsteamloco:library/code/face.js"));3 i. c8 L2 C# z5 C# S( ^
- , S$ w5 H$ I$ Z7 }7 E" J% l
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( Q+ ~$ }& q# ?: w3 H
- ; _' y: j. Q' T" M
- function getW(str, font) {
( |2 C9 g+ h4 O1 d - let frc = Resources.getFontRenderContext();
, ]- Y3 s! C* Q& [' e, [) G$ O - bounds = font.getStringBounds(str, frc);7 z, @# N1 B. y% x5 j
- return Math.ceil(bounds.getWidth());
F9 I { S! `! X9 K7 G3 P - }
" D: w: O! s7 x3 j! L0 s* p
! H4 t3 g4 {, g6 I7 Q3 w- da = (g) => {//底图绘制& s: t, F. a7 q0 y- Q
- g.setColor(Color.BLACK);
- I( s4 K7 O, ? - g.fillRect(0, 0, 400, 400);
+ G! [9 u" |9 N( X- G9 d$ H1 U - }) u' z5 ]# P; k1 q3 I
- / [4 K" D2 U1 B% F, e! \
- db = (g) => {//上层绘制
1 ^$ X7 _ W D" v$ ] H2 C - g.setColor(Color.WHITE);1 S5 J0 v" f' T: s8 ~
- g.fillRect(0, 0, 400, 400);
" D/ @7 i8 \" [# w# S - g.setColor(Color.RED);
" |; K8 d6 J& h8 z2 i; [! K - g.setFont(font0);
5 j* a/ ?6 r' L2 x - let str = "晴纱是男娘";
, f! ?) I. u3 \, j - let ww = 400;. v& g4 d# K/ r6 n( p
- let w = getW(str, font0);1 N0 I+ F' Y1 h9 h
- g.drawString(str, ww / 2 - w / 2, 200); k4 P/ o0 Q0 d% U% f/ u0 V
- }
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2 r2 k# `! m" m- E5 ^9 \- const mat = new Matrices();
% G7 ]! P8 @2 V* h& i. R/ V8 K6 } - mat.translate(0, 0.5, 0);4 l* D* _, o- G/ D
- : M- o \% P+ p: W# z2 H
- function create(ctx, state, entity) {
4 i- T! Y3 V& u4 M9 | - let info = {
6 C7 [& @7 w' |4 _ - ctx: ctx,5 i# B( N/ m- \! A8 o5 Z& U
- isTrain: false,
/ W% W% e$ K4 g( U9 j3 b* x - matrices: [mat],
5 N H* F/ P/ H- q - texture: [400, 400],) Y3 i- Z/ S+ \1 Z
- model: {" G) v; }3 U- W$ }1 V+ \
- renderType: "light",
& u. ^' a2 ~5 c, g0 |# b! c. T - size: [1, 1],9 [2 r- \& l- K! I0 \- ~: m! `. {
- uvSize: [1, 1]& l% a4 V5 R; s% w/ q% ~% S5 o
- }
7 A7 j. f6 n' u - }
& B T( W, C( S( j# v( o: X/ ^ - let f = new Face(info);
1 S: t k0 v. M" I# l - state.f = f;+ j+ _1 b% [( C/ W$ ^
9 H) ?7 A4 g( A0 H K1 Z- let t = f.texture;/ k* d- c+ R3 D1 R8 h
- let g = t.graphics;
* l4 H( O7 Q( Z/ q - state.running = true;
8 _# o z2 j& l- z - let fps = 24;
( Z1 ^' P# r! q4 V! s, @ - da(g);//绘制底图1 m6 `9 @( G. p, ^4 f2 D
- t.upload();" a- I _ B) q" t0 x
- let k = 0;
5 G {- C0 a7 S6 D# j; V W# m - let ti = Date.now();& k) W8 h5 |3 ^" k
- let rt = 0;! m' _4 S- U9 X+ v5 {# U
- smooth = (k, v) => {// 平滑变化( ^. G) l' T; T8 `7 h4 }
- if (v > k) return k;# t2 W( G! B% |/ `( s
- if (k < 0) return 0;
: l4 |4 l0 _0 U6 x+ l - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;. N% I' @9 Z5 w( G$ g( `
- }
9 G: V9 T& K# Q' a$ u ^ - run = () => {// 新线程/ ]# P0 i, k# V( a3 S5 z
- let id = Thread.currentThread().getId();
% l/ ]* q# P1 o' Z - print("Thread start:" + id);- [) j9 W9 R6 O( K. j) g
- while (state.running) {
" t9 F- h+ G8 u0 r2 w- j7 {9 w - try {' b T8 f8 g: }+ v* B# A; {
- k += (Date.now() - ti) / 1000 * 0.2;
# k' n9 t3 n" K; }3 R. |3 F5 | - ti = Date.now();
# ~' n6 o% T, h/ r2 _ - if (k > 1.5) {9 R: e, M$ |8 S% ]
- k = 0;8 u+ {1 ?. x; m* E ^. t
- }
* w* o4 b( S0 T - setComp(g, 1);
" U8 G" }, Z6 Z6 n: x$ n7 R) h - da(g);
( X# ]0 i. O- O# v - let kk = smooth(1, k);//平滑切换透明度
# r# q' d K' x/ C1 _/ ]+ T - setComp(g, kk);/ }* ]+ i0 F2 ?% O" s
- db(g);
) z( @2 o- `- i* ?6 D8 h/ E - t.upload();
+ t3 ]6 A* Z% b; P - ctx.setDebugInfo("rt" ,Date.now() - ti);
1 O2 a* Z. }' W) @% ?0 R - ctx.setDebugInfo("k", k);
4 s+ K$ [; `, s( z) {1 a* r6 D - ctx.setDebugInfo("sm", kk);
2 g' ~" @) g$ t; N! p' S - rt = Date.now() - ti;( a2 k8 E" H, w0 f
- Thread.sleep(ck(rt - 1000 / fps)); _6 t; e- r4 T% c4 S/ i: G5 l. p$ I
- ctx.setDebugInfo("error", 0)
) x2 U; q; h& s) x+ H9 V% S0 s - } catch (e) {
R& t3 |* |: `' p0 c - ctx.setDebugInfo("error", e);
4 R( ~. E8 v3 O - }
* U! B, ?6 U; A8 b - } ^4 R$ t* ?3 I) [: t" e0 g" o, f" {2 U+ L
- print("Thread end:" + id);$ t0 \' s' N. n
- }' ?0 _' x8 W- r/ Q. a. f) k
- let th = new Thread(run, "qiehuan");
( ~1 C5 a( ?8 w3 z5 @0 h4 h - th.start();9 {1 w- N& N$ a! t7 S
- }
% r* u! G: H0 l5 x' Z7 b& { - . \0 O& D8 [1 ~( `- {
- function render(ctx, state, entity) {7 n* t# l$ N4 \7 o1 I( L- a
- state.f.tick();
O. ]' @8 b; R. j+ V - }
9 N/ S9 V+ y7 v% n8 W - ) k4 b7 r( V& `9 W& [
- function dispose(ctx, state, entity) {
3 v6 H6 m/ o6 Q7 A - print("Dispose");
; U U& y! Y% b, O - state.running = false;9 F, Z" |; L& z. K) m
- state.f.close();8 ?: E+ U* O; }. C' k9 L" K6 N
- }
s1 Y4 h ` C* J( F) G - . {" ?4 w7 M1 L0 K/ {
- function setComp(g, value) {
2 I/ g" r: v; U9 Z1 i - g.setComposite(AlphaComposite.SrcOver.derive(value));" d3 L+ C, |+ |( s3 Z
- }
复制代码 & i* u. A4 i, h- Y. A8 O- b
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。+ j0 ~* M. i. T: K1 `- f
7 K# {" Q6 L; q
5 K# l; B' E& {4 m& T% |顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)6 C; d3 _" j: T8 v# @1 W& n6 a
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