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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。
% G1 C' B B* E- importPackage (java.lang);4 ~- h0 S2 p3 U7 q* z( ?
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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: U. p7 {; E/ t" n- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);* v0 m+ Q" A) l+ A i0 p
! B3 `; \: V4 @1 L) U. b2 ~' c- function getW(str, font) {
5 L" P; ?6 Y) t* p" n4 }' G# M" \ - let frc = Resources.getFontRenderContext();
3 b# R9 A8 N, l1 _: A - bounds = font.getStringBounds(str, frc);5 d9 s. |# t9 L: `8 j: c
- return Math.ceil(bounds.getWidth());
+ ]6 N/ C! K+ p% B0 w- P1 } - }
7 V9 E7 i+ ~! F! b/ q1 A' U - 8 L) g" u1 u5 v3 C
- da = (g) => {//底图绘制
8 J" v7 p& o+ p+ J5 `9 T6 [* y, E - g.setColor(Color.BLACK);& i3 M" P3 @5 l4 D4 X$ M r* P
- g.fillRect(0, 0, 400, 400);
/ p9 f( h! r( C. d4 V - }
5 i" j" ]4 u& J# {- b# H- N
H, M( u5 o; v; D- db = (g) => {//上层绘制% M" r l5 t$ u8 l: k3 @
- g.setColor(Color.WHITE);
6 \ Q/ R1 _4 ~" N: J' {! Q6 F* t - g.fillRect(0, 0, 400, 400);% k7 x0 Q `8 p* O4 G# U* a
- g.setColor(Color.RED);
& N) b+ B4 h; M - g.setFont(font0);) ]& C' M$ H/ u7 n$ ^' o
- let str = "晴纱是男娘";/ T, G: r9 J( W1 m: F$ x- y
- let ww = 400;
$ O* h8 M3 c( r3 e - let w = getW(str, font0);
- y0 p4 x: Q, y& P: W( z6 H - g.drawString(str, ww / 2 - w / 2, 200);3 Y* u* i5 q8 H7 w& S
- }* G1 i; H. T1 l
?6 _' u5 u$ l# |8 q: s) P4 k% k- const mat = new Matrices();2 [, p$ L4 i% Z8 c2 o
- mat.translate(0, 0.5, 0);5 u3 e2 b* B' M& j! O
- # Q9 \9 p- N* {" [+ @
- function create(ctx, state, entity) { ]7 ~* n$ k; X9 f p0 v
- let info = {
7 v, G3 h& R' I/ l/ ~4 D- ~" I - ctx: ctx,8 N1 u0 z! a4 A
- isTrain: false,
: J+ {5 ? ^8 A/ B3 i& C - matrices: [mat],
' V2 b0 b, V6 h1 e. c - texture: [400, 400],
/ Z, I v5 j/ A3 k i# E$ g: Y - model: {
" _9 R7 d$ G4 x7 a' N& ~( ^) S! ? - renderType: "light",+ j* A9 E {& B: o G/ h1 x
- size: [1, 1],
4 {& g7 M& f( J& K - uvSize: [1, 1]
% z2 B8 [) `- G% O R3 S - }
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- let f = new Face(info);
5 J! T- v- M) h: A2 m4 d" D) A - state.f = f;
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- let t = f.texture;0 s. I/ }, q, d* A8 ]; _5 C2 A
- let g = t.graphics;( T- \/ f# R9 Y. q* Y9 b3 J
- state.running = true;
! x% H4 F8 W9 U1 A2 y5 p - let fps = 24;
5 T8 [6 R) U* c5 d; G/ W - da(g);//绘制底图$ o$ e! B4 y3 q$ A& c. `4 x0 U
- t.upload(); ]) d5 U E2 h
- let k = 0;
$ f2 g, X4 g h( ?2 u! n - let ti = Date.now();
$ a8 Z8 l4 T( h& T - let rt = 0;
: t9 P3 o5 ?- O7 O2 h - smooth = (k, v) => {// 平滑变化8 X3 B! D& h& B+ y, i
- if (v > k) return k;7 w! P2 i+ Z5 A: N, Y4 i
- if (k < 0) return 0;/ c. s: A, |+ Y: }& }% ~' b
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
% W" i0 `5 Z# ?5 J$ { - }$ a. D: E7 ~5 g; a1 M z. p
- run = () => {// 新线程) M: v" ~# ^' g0 P+ C7 H
- let id = Thread.currentThread().getId();% X0 T9 m# f( G) [
- print("Thread start:" + id);
- w: i! }% Y% ~8 t _; | - while (state.running) {
6 E' z1 O4 m# I; E. N - try {* ?* B/ T8 U/ V# o; F# U/ R
- k += (Date.now() - ti) / 1000 * 0.2;
" a, Z& p6 J+ Q2 Q ^# c% W - ti = Date.now();
" m0 }# x7 l) B: p: }5 j - if (k > 1.5) {8 B* H$ f4 i8 X5 x" m
- k = 0;
% `5 g6 C9 T( l" V8 ] - }
$ S1 P6 t$ {: ]5 k. I# v - setComp(g, 1);
* ?# ^' T; P5 n - da(g);
" \9 C* C1 q4 l* D5 C* Z8 L! P! n - let kk = smooth(1, k);//平滑切换透明度
" n" y3 ]) P9 @+ y; F: e: V - setComp(g, kk);
- r r _+ S% [! ~ - db(g);' a! g: P& T6 ~; S* j
- t.upload();
7 F J, G t+ U, e1 v7 ? - ctx.setDebugInfo("rt" ,Date.now() - ti);
1 T2 _) ]1 ]9 G - ctx.setDebugInfo("k", k);
: d9 L9 h- C% L; T" S/ F: q4 n B/ N5 | - ctx.setDebugInfo("sm", kk);2 a4 b- `2 Q! |$ @# k
- rt = Date.now() - ti;1 C1 y' Z7 V& b# E: s+ E8 [# [
- Thread.sleep(ck(rt - 1000 / fps));: I# |( E8 z, J) S& o2 Y
- ctx.setDebugInfo("error", 0)5 s$ K' J# p$ u4 O" j
- } catch (e) {
/ Z( B" O4 ^- f2 E" n" ^ - ctx.setDebugInfo("error", e);
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- }
$ u) I# |5 l8 ?9 B4 Z1 e - print("Thread end:" + id);7 t E4 a: `+ w$ c( |, `
- }
: V, @" t7 l- ~+ p: w7 ~+ ` - let th = new Thread(run, "qiehuan");
) Y. |! D. Y1 ^8 e+ }# e - th.start();
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! \& Q2 v9 {( z, ^! [8 G- function render(ctx, state, entity) {( P; q% D8 m, @8 d5 @/ M1 W: O
- state.f.tick();' {( R1 U% ?9 i: q- Q4 U B
- }' l2 \% r: f& @, x
( n$ [5 H1 T, z/ e% ^2 \+ h3 ?% \- function dispose(ctx, state, entity) {
7 u4 P* G' f4 F6 \ - print("Dispose");
0 R) D2 Q, y6 n8 W) A. c, z; s - state.running = false;
2 D& v- h" e) A6 G+ K - state.f.close();' k+ O; @1 A/ t4 m2 ^
- }1 E( G( h& f/ ~6 N7 ~ W2 @
+ i2 L+ W% r F5 G! k( ~/ i- function setComp(g, value) {- h! t: o& m- n7 S
- g.setComposite(AlphaComposite.SrcOver.derive(value));% L, t% Q- ]6 q! U+ M
- }
复制代码
) l [! w3 q" Y( M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。& x* ]2 W0 Z2 A, Y9 v: t7 H
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6 P" g' w# K5 u& \* N+ q$ W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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