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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 x, p' w9 I$ z9 I1 O
- importPackage (java.lang);
" } a, }3 n5 ], k- h, V7 k - importPackage (java.awt);; x6 `+ \* A7 [/ }) `2 G
5 a+ X) C; f' _- V9 f6 d% c- include(Resources.id("mtrsteamloco:library/code/face.js"));
% n( J4 `# N1 f+ G) \ w
$ D! S5 {" `8 C- U5 X- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" K- ~! A+ _, F1 k
1 b9 H5 U. d0 q9 l: W: ?: p- U- function getW(str, font) {
9 [$ I. d$ _ F - let frc = Resources.getFontRenderContext();
! U- q) a _5 C6 h - bounds = font.getStringBounds(str, frc);2 M9 M) c/ l' r
- return Math.ceil(bounds.getWidth());" |0 i r; I J/ Y( J
- }- T* e+ u, B7 s! ]; K* H
z* F3 x& \5 Y: V$ W- da = (g) => {//底图绘制9 y+ [4 ~! V i6 i2 V
- g.setColor(Color.BLACK);
$ f9 [- s" A. D - g.fillRect(0, 0, 400, 400);9 V" y) {+ X0 z/ J. `
- }
. e C# @" a$ q - * E+ d2 \& q' f/ @* I/ |
- db = (g) => {//上层绘制( ]) P2 d* L# W" `( b3 Z& L
- g.setColor(Color.WHITE);
, W7 p* X% I5 ]% w1 ` - g.fillRect(0, 0, 400, 400);
5 R5 H% I# L; H$ J8 ` - g.setColor(Color.RED);
. _ ` y/ j( C; i3 Z* P - g.setFont(font0);
. {1 V6 H5 x. n: d' F# G - let str = "晴纱是男娘";: H, J% p3 P x' Z, S0 Z$ }
- let ww = 400;
8 U1 p8 |* X- l0 m" Y- P - let w = getW(str, font0);; X/ n8 h( c% q2 k; s2 H6 g- z
- g.drawString(str, ww / 2 - w / 2, 200);$ y( t6 ?! l2 q% Z+ W, f) n( B+ b
- }
+ F& y0 F) L# R [0 H! e
& ?+ S! Q: o$ J5 h- const mat = new Matrices();
3 m0 e" \. @ j( K8 H- C: h3 t7 k - mat.translate(0, 0.5, 0);
1 x! ?. \, l( Y1 X) A - # K% I4 I6 E: \
- function create(ctx, state, entity) {3 [9 y0 a& Y' c
- let info = {0 ?9 n4 `) H9 p! T% V9 R
- ctx: ctx,
) `* e' ?% H. f1 j6 V - isTrain: false,- h8 R; u# V' c+ g6 M
- matrices: [mat],5 V8 ~5 F/ ~2 s# G8 N; x S- {
- texture: [400, 400],% L1 t; s0 {1 m7 q b
- model: {
6 _! E" c1 L( \) T2 k4 J7 I - renderType: "light",( n7 y) H9 O/ n- F' n+ E
- size: [1, 1],
5 _5 r( r; V3 T: r2 m" s - uvSize: [1, 1]
% W9 m+ d% |, Z2 |' {- ] - }: l7 J3 i: o3 L5 l
- }
0 Z9 w! d$ B. {3 o) x+ i# q - let f = new Face(info);9 m0 t) \8 D% b) ]
- state.f = f;
% K/ [4 a* L* s5 ~2 H8 V9 U - , m8 {- Y9 Q8 g; D! q9 C2 u
- let t = f.texture;
: H5 `- |) |( |5 |6 m4 v6 q - let g = t.graphics;* J# m' J: G6 _4 a
- state.running = true;, c5 d# T4 \9 ^2 h( Q# v( l9 Q: P
- let fps = 24;9 F, b% c: c4 p2 T# d6 k5 C
- da(g);//绘制底图
& B! Y" t2 a9 K# O9 V8 U- u V - t.upload();6 z) e6 ]# J5 a3 h: a3 q
- let k = 0;
( J/ ~7 R8 c* A R. R$ E - let ti = Date.now();, k, e* A5 M) m2 _5 I3 S
- let rt = 0;
0 i% D3 P: c' F4 S/ b" q$ W# Q - smooth = (k, v) => {// 平滑变化
# L* S$ v$ h3 j; Z" O; q5 A - if (v > k) return k;' c6 `5 U5 d8 R& f) h
- if (k < 0) return 0;
8 z9 o! B* p% R: y - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* Y7 Y& I9 \. S8 v* u* m! D- ^2 p - }
, B2 O) w0 }" L9 I - run = () => {// 新线程
$ _8 u2 Z1 F' G: L& v% K - let id = Thread.currentThread().getId();
. @* a9 S) t7 f2 E7 |( D9 f8 L - print("Thread start:" + id);
8 R; m R7 [: v7 e+ l5 w - while (state.running) {6 R* c: L0 M: P9 T
- try {) q, Q$ k* v; _9 _( G
- k += (Date.now() - ti) / 1000 * 0.2;
2 q8 u P9 {) e- `, w( H - ti = Date.now();
, Q, m) l' J0 ?% }7 H - if (k > 1.5) {& z ]& q+ c' v, V4 \
- k = 0; u- x7 P9 i3 k
- }
" V8 F0 p- R O+ Y+ @2 R5 z! x - setComp(g, 1);! n* |1 i7 b: b) J" L" Z7 h0 c
- da(g);6 S4 h3 h0 z3 Q& E
- let kk = smooth(1, k);//平滑切换透明度4 K) ]) _6 O* E: l! X$ D
- setComp(g, kk);
3 E* s r0 j# i6 ?) k - db(g);' W" {) J% b. i0 m# ]8 e, z
- t.upload();
! }' i! U T+ S4 p$ H - ctx.setDebugInfo("rt" ,Date.now() - ti);# b! Y" m3 a% U$ f! P. u
- ctx.setDebugInfo("k", k);
& _. Q" L2 H: }+ T* u, C8 X4 z - ctx.setDebugInfo("sm", kk);- J2 p6 K& N5 e% v$ j& o, J
- rt = Date.now() - ti;4 s/ a0 H6 d1 N# l
- Thread.sleep(ck(rt - 1000 / fps));# w8 k Q: N( E& J6 e% ?2 c
- ctx.setDebugInfo("error", 0)! h9 Z- c- | Z1 D$ U1 z1 p+ U
- } catch (e) {5 m8 K. E3 S* N% k
- ctx.setDebugInfo("error", e);9 ~0 m/ Q% d& O& j" @ C
- }9 J: @+ T+ B# K3 p3 | M
- }* X Y& N( q2 w/ }+ T, m' ?! _
- print("Thread end:" + id);
( p E5 E }6 J# a5 W - }+ [3 |: f' X c2 l# i
- let th = new Thread(run, "qiehuan");
3 D' u3 x3 p1 B' q1 Y - th.start();
" u- S6 z2 s; w* _ - }9 [, p/ m+ Z# Z+ _& ]
- , E1 X' v/ }, F( D
- function render(ctx, state, entity) {7 g1 T$ ]0 H; I: o! p. h0 N
- state.f.tick();. q% b8 K8 t8 |$ V' I
- }+ C0 G+ y6 W9 n0 C
- # X( D- [: L$ g; C; k( b) F8 I3 W: r
- function dispose(ctx, state, entity) {0 | p1 A3 p& ]
- print("Dispose");4 `# g! _9 k3 z M; y7 c( e, V
- state.running = false;
6 E; P% a3 l/ O; A6 |1 b! K - state.f.close();- r* o% E/ u" i/ j$ i# `3 T) k' t! s
- }5 C& j2 J; k# _. L6 U4 { o6 |
- ( }0 s; a' N1 f+ _7 @. J( x8 }7 ~
- function setComp(g, value) {
3 K J7 N) h* C7 b& a6 ?2 j) R& ^4 U - g.setComposite(AlphaComposite.SrcOver.derive(value));
4 M+ B# r- e6 x - }
复制代码
# P+ _" ` O+ ]8 g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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+ p; z$ N) @1 T, A* g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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