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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。
1 Q, v, t9 l) u/ q! P$ |0 e/ @- importPackage (java.lang);- t4 J( r1 |) S2 m
- importPackage (java.awt);) r/ d8 v2 n5 R' V1 G i/ w) F
Q4 Q! O# F3 a- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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: k9 R; V4 t! ~% ]- function getW(str, font) {( ^& q& L2 U9 ?8 m5 Q) i( }& r+ w
- let frc = Resources.getFontRenderContext();
# G h! s& O+ P6 o - bounds = font.getStringBounds(str, frc);
0 P! H' m8 }: J/ w# C, Q - return Math.ceil(bounds.getWidth());" ^( G9 }2 p8 W
- }
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- da = (g) => {//底图绘制
( m" v4 [( K. q( ~0 _ - g.setColor(Color.BLACK);
* z4 A. r9 d0 x! `- D7 z5 z1 o/ B - g.fillRect(0, 0, 400, 400);
% }7 e4 B: W% ^% a - }
8 Z8 J. j( q; ?$ O% i
7 [ u4 r3 e0 f) ^) ~- db = (g) => {//上层绘制
' ^2 D+ N3 [: Y# p, U - g.setColor(Color.WHITE);
) h. [- r8 y2 \/ C4 H - g.fillRect(0, 0, 400, 400);5 R$ o+ `- P% X4 Y" |" p
- g.setColor(Color.RED);
$ R7 z L5 S; m - g.setFont(font0);
6 T; a) x3 X+ m# R3 m# k9 c0 I6 V9 f - let str = "晴纱是男娘";
; A9 t; e3 I# J: u3 I - let ww = 400;, n4 i# _7 c4 X8 T
- let w = getW(str, font0);7 F8 r! x1 f2 h& N
- g.drawString(str, ww / 2 - w / 2, 200);
+ {. r* K+ ?' x. J9 W2 X5 s { - }/ {( O) S1 ^5 c- N# X
! Z: y- W$ z, f3 {* {- const mat = new Matrices();
; x* F$ P# V) U( e, b7 @2 E - mat.translate(0, 0.5, 0);; `0 r6 X6 p6 V
9 A1 D: H8 D' W- b; G1 O- function create(ctx, state, entity) {# w4 d' A. C5 w' @( q
- let info = {
6 n9 R) Y7 f* \9 B5 B# A4 o" y - ctx: ctx,; k+ c9 z2 y0 M- z# L7 n
- isTrain: false,
# T+ ?+ r2 \: U' s - matrices: [mat],1 Q! @' V# l4 o( p& g
- texture: [400, 400],4 v4 u) P, V3 M1 |
- model: {6 `* x) r! s4 O
- renderType: "light",
6 D) G! T T# N) C* x6 O - size: [1, 1],- \0 h: }6 n2 {
- uvSize: [1, 1]
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- }
- U; |0 y: V5 t! N2 r+ \" G3 t; g - let f = new Face(info);
$ x) p, @5 H3 x* P) R( \ - state.f = f;
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* z2 U4 _4 x' }/ W- let t = f.texture;8 }/ Y! ~5 e0 r2 T$ k8 b
- let g = t.graphics;
$ L- b# n+ `% p+ `8 E+ o8 C - state.running = true;1 x1 y6 f: Q7 l
- let fps = 24;) j# k v+ b1 k: r, @7 {& Y
- da(g);//绘制底图+ e# @7 n% c9 n8 `! {
- t.upload();8 z# o% B$ e5 N j7 f( X. {
- let k = 0;/ g, f8 f4 b4 `0 A9 d! ~, e
- let ti = Date.now();
' O" |' {6 \6 l - let rt = 0;: U* h+ ^6 n) ]" J* E
- smooth = (k, v) => {// 平滑变化
3 L+ M1 D' k* A - if (v > k) return k;
! ~! a1 Z5 q1 k7 q, x* M* `, X" S - if (k < 0) return 0;
# v7 \% { T6 ?' I3 E" c9 N. E% w - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;; ~, A$ c, b: b2 b; ~3 G
- }7 A7 V1 p7 c5 i9 s |; k+ b
- run = () => {// 新线程; ?7 P1 Q5 W, j3 C& \, O
- let id = Thread.currentThread().getId();/ b* M" J# N4 w* Q, V# k
- print("Thread start:" + id);
$ ]# U ]. j! R3 h - while (state.running) {
7 [9 Q2 k/ x7 O; u( ?4 J - try {: P" `# c3 Y c
- k += (Date.now() - ti) / 1000 * 0.2;
+ G1 D* \7 Q$ ?) q) ] h - ti = Date.now();$ q* f* L- \+ \
- if (k > 1.5) {
6 p9 v: P- u5 n& u1 P* J! B6 k - k = 0;# S* S+ `3 t4 m. B, x, s
- }
/ n. }1 a) W0 ^, @7 S! v3 Z - setComp(g, 1);
?5 W9 k5 h! m, E% } - da(g);$ J3 }8 |! s4 Z* m
- let kk = smooth(1, k);//平滑切换透明度
( l) {7 z% F7 y" `; n+ W - setComp(g, kk);
9 d' J# K! j/ \% v" K - db(g);* A3 Y9 N8 q. w) a+ m: _
- t.upload();
7 s. f% s9 r" U' B) |5 j1 { - ctx.setDebugInfo("rt" ,Date.now() - ti);& a5 P9 `0 ]0 ~* {. ^
- ctx.setDebugInfo("k", k);
( I! `5 b% M! t7 m& y - ctx.setDebugInfo("sm", kk);
8 F( l: v6 f" [) p& k) p6 v. Y6 N - rt = Date.now() - ti;% M& X" I# y3 k. g7 T7 L8 L. G) y
- Thread.sleep(ck(rt - 1000 / fps));
) @: ^, i: |+ p - ctx.setDebugInfo("error", 0)
( }- g, u2 [1 s; N, E - } catch (e) {
2 P6 d% ^8 s7 S( L% R - ctx.setDebugInfo("error", e);+ A; E! c& G0 s5 E3 m
- }
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- print("Thread end:" + id); p/ O" a/ S$ m$ d2 Q1 q
- }
" U1 y2 N q3 V - let th = new Thread(run, "qiehuan");9 p2 U& E1 v+ w3 \+ Q
- th.start();
% n5 }8 W/ j+ e6 t8 c: n5 D - }
4 w: G! `) i3 o8 @" n* b
6 @( M0 ]( y4 ~. j3 E- v6 L7 D- function render(ctx, state, entity) {
! v3 _6 G! g+ @6 D. Z - state.f.tick();
+ I( J8 L: Z/ b [/ [% E - }
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& g0 Y( H$ ^/ h" k- function dispose(ctx, state, entity) {
8 P* t: ^' K2 u6 k - print("Dispose");3 P/ `/ {- W n2 o6 M, R
- state.running = false;1 N# H# ^) h6 v. j2 `3 y
- state.f.close();
1 I5 L- V& |! V/ | - }
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- function setComp(g, value) {
1 i5 ]8 J8 W; J0 B+ x3 s - g.setComposite(AlphaComposite.SrcOver.derive(value));
% X+ X5 g" `0 i& j9 u& r& r - }
复制代码
6 H* j7 s0 ]3 h2 L) n5 T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。/ \) r' H: A% }6 F2 P# l
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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)5 |# A! {% ~. O& ?4 T& E
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