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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 {4 X3 P5 _9 C+ }" x& @ T/ n- importPackage (java.lang); J. ]9 Z$ @) d- H
- importPackage (java.awt);9 s. ~. X+ d0 c& ~1 ?' h2 b7 l4 u
- - I4 E4 _% T8 i; S7 ?- p
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ V; x7 k4 r' j) K+ e
8 f: ?+ R% b0 Q9 ?8 x* C, s, W- function getW(str, font) {
6 s' L' x8 i3 x$ ]0 S - let frc = Resources.getFontRenderContext();' C# j1 n+ A7 a5 v7 t' ?: }
- bounds = font.getStringBounds(str, frc);
5 r7 `6 B3 P# E& t+ Z2 y: ` - return Math.ceil(bounds.getWidth());
& _( q9 H7 z: H& O6 s) ~( D$ f8 t - }$ }# Z2 F4 ~ G' Z% g: \
- 4 B7 ]+ w5 c7 s4 J/ {
- da = (g) => {//底图绘制
9 P. P% V9 B3 S6 Q L - g.setColor(Color.BLACK);$ V/ u; y6 u: M" F
- g.fillRect(0, 0, 400, 400);
. W7 S( z! \: @+ u# G g - }+ Z5 f$ h' m; a- C) x! Z
- 5 t8 g2 g/ y1 [3 @* {' w
- db = (g) => {//上层绘制- x2 x: W+ p4 a* R6 ?3 i3 z( N
- g.setColor(Color.WHITE);1 {* D# H" `, w. b
- g.fillRect(0, 0, 400, 400);
( y& |3 n3 e- ^ - g.setColor(Color.RED);# R `* O* [& \* [4 f/ j# K
- g.setFont(font0);
& z- f9 E8 d$ `* T - let str = "晴纱是男娘";
& X* p v0 {/ G5 r; s$ `; g u9 z# m) u; R - let ww = 400;
1 A2 h8 y3 y0 [3 t5 O2 ^ - let w = getW(str, font0);
: f% p' B5 U" b9 t - g.drawString(str, ww / 2 - w / 2, 200);
% u8 D* ?# w, q - }
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% F% c5 t2 F2 B2 |5 k2 Z- const mat = new Matrices();
; U& U7 `8 _0 ~- V9 c) [! l - mat.translate(0, 0.5, 0);$ @7 q7 l; b1 h! }/ V
h+ `, M a+ e2 ?$ B* u# F7 v- function create(ctx, state, entity) {
* ^$ w7 N7 U! a8 C( n - let info = {& G# T+ ^" B+ h
- ctx: ctx," e! c9 V4 z- a& _6 `
- isTrain: false,
4 p* R+ l+ Y! G5 ?/ @! s2 b! y& P - matrices: [mat],
' I) C9 [- t: f! B. W7 B - texture: [400, 400],( a9 G" s9 C- H0 z F& M" B J- r
- model: {* C3 ]' y) s. w3 a8 r c
- renderType: "light",+ O. J2 d) g* H9 N9 f6 G
- size: [1, 1],) U% _4 S9 m1 R4 `& a! A4 K: G) b
- uvSize: [1, 1]2 @9 q4 n3 V& t, a; F
- }
* z7 w! `- r6 [4 s- c - }
# c6 x N( |9 V% [) }- m - let f = new Face(info);
( U- h/ i- r, a1 o" V, R% y2 c - state.f = f;
- G5 e/ f" L! { ]# k; W
* M# _$ m8 y- |- let t = f.texture;( y& y! A0 b" o3 w, X+ p
- let g = t.graphics;
8 y9 O5 f6 _5 ?4 c - state.running = true;
9 F A! W) m* k - let fps = 24;
$ ^, y4 }- j! K/ |( {1 H - da(g);//绘制底图
* {& a* p8 o# M. | [* L" z* y- Z - t.upload();# j* ^& I2 @. c& f
- let k = 0;, k8 ]( S7 |& W# i; Q$ R4 c
- let ti = Date.now();6 V$ v3 m/ t% S* d; }
- let rt = 0;
! K* F. Q/ I- \4 z) m$ ?( E3 s - smooth = (k, v) => {// 平滑变化
; [9 h3 D; ~. W; E2 e: t# C - if (v > k) return k;
' y, S7 q- B. W - if (k < 0) return 0;
* @: e) ~ M {: z5 I0 }# x# V - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
6 c7 e9 k8 B# T& Y3 w - }
/ v1 K0 [3 `; L! O4 S2 {: ]" O l - run = () => {// 新线程0 }' M% \$ `, n& [4 O
- let id = Thread.currentThread().getId();
$ a7 F7 s# u; G3 Q1 I - print("Thread start:" + id);8 d/ B8 ^+ r. W" S1 K) e
- while (state.running) {
# |; b6 \9 G$ q$ s8 n9 A - try {4 ?6 E$ m1 [2 D2 ]
- k += (Date.now() - ti) / 1000 * 0.2;
7 ~) A' q$ L9 ~6 X7 D, w - ti = Date.now();
: Y. ? e& L1 |* x4 R' l& o( H h+ T - if (k > 1.5) {
$ q5 y1 M( I+ H& o! m* q - k = 0;/ D1 T( u4 s. t7 N3 N& ?4 Q: }
- }
$ R( Y' x5 F6 ~0 H - setComp(g, 1);
& l6 O. n' [* \; A( l2 s - da(g);# ]: r" o. D( L) h
- let kk = smooth(1, k);//平滑切换透明度
/ p, [$ ~) ]. n9 r - setComp(g, kk);
/ M! h! T( b, }) s - db(g);
+ Z2 J( l* ]* r/ G' \ - t.upload();
( ?% B! z! V, {4 _ - ctx.setDebugInfo("rt" ,Date.now() - ti);
/ `/ M( E& L! g - ctx.setDebugInfo("k", k);# n5 w( \7 x& d( F# R' C
- ctx.setDebugInfo("sm", kk);/ \* S& E; W; |( X" E
- rt = Date.now() - ti;; R6 o/ B- D# [' e
- Thread.sleep(ck(rt - 1000 / fps));
* M9 F5 T3 ~; Q; b- S0 j - ctx.setDebugInfo("error", 0)
' O+ Q2 [3 T- \6 j3 d - } catch (e) {+ ^, p: E3 C. J5 w2 M
- ctx.setDebugInfo("error", e);. t) F7 c* C. ] B) D8 q
- }
+ D' J$ z- \0 q - }
1 j( i, p% L' Q, C2 _ - print("Thread end:" + id);
4 N# L; P; ]% S4 ~/ u% y - }
# K6 t7 u! }$ q* |' {+ o7 y - let th = new Thread(run, "qiehuan");
" a- y% Q2 f2 _9 o- ? - th.start();
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4 f" \0 G( B2 f- function render(ctx, state, entity) {8 D+ ?8 F* Z, D9 ^3 ]; g6 ?
- state.f.tick();! I. S; A0 t0 W" v2 `
- }
, P D3 Y! u/ D9 u n
1 ]/ c; c7 U2 ^& e( B5 K- function dispose(ctx, state, entity) {& H2 y* G* h& F; P7 R
- print("Dispose");2 ]4 J* ]: l# M2 I
- state.running = false;
1 {4 M9 z) ?9 @5 i# u4 D3 d - state.f.close();
4 T: I/ o* U4 O4 y" p - }
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6 m0 j& a* M6 p- function setComp(g, value) {' x) ]' T% L L) {' W
- g.setComposite(AlphaComposite.SrcOver.derive(value));- Q1 t: Q+ P( ~8 N, d: P: T
- }
复制代码 & o1 \2 [+ o7 {- S
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。) H% c! [( K. P, ]8 u* h) Q5 ~: z; M
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: S" ?- r& A: t% L( C' V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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