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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。
$ G& e' a6 I8 }- importPackage (java.lang);
[7 L9 O$ M" G+ t- M - importPackage (java.awt);
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! @8 Q/ u g5 w: a- include(Resources.id("mtrsteamloco:library/code/face.js"));: m2 N" c( |5 |5 B
" W& }% }) L1 z+ J% S/ L- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {" K& i/ {) s8 R& f
- let frc = Resources.getFontRenderContext();# ]# h* Q. ^; |1 O' h0 a
- bounds = font.getStringBounds(str, frc);! Q% C# l* X! g( Z" u
- return Math.ceil(bounds.getWidth());- p. r! H: n. d, q( _
- }
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- da = (g) => {//底图绘制
3 G8 t7 D( q5 W. A# j' P - g.setColor(Color.BLACK);& y( f q* @8 V2 N& Y# }3 B) L# K
- g.fillRect(0, 0, 400, 400);
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/ r$ ]) |- C' y% M- db = (g) => {//上层绘制8 N4 E7 [* F, `8 J. e' N; M
- g.setColor(Color.WHITE);
0 _8 G" H1 {: W, A7 K+ h) o - g.fillRect(0, 0, 400, 400);
' ?1 Q" N3 e3 d4 Q8 a2 a - g.setColor(Color.RED);
. @" f# P; t$ G* r/ j - g.setFont(font0);; R- a v" I: R3 l3 ?3 Z! [1 U
- let str = "晴纱是男娘";
* [2 R2 \2 F4 O& {/ u+ P, ^; A8 b - let ww = 400;
5 w+ |) o. X! X1 u# A - let w = getW(str, font0);
& z" ~( _) S+ K7 f/ e - g.drawString(str, ww / 2 - w / 2, 200);
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# P7 |6 X1 c) ~7 s/ X/ O- const mat = new Matrices();
. {' J& @: D, X - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {; s) m, O0 L4 _- G) C2 p2 [
- let info = {
8 {2 c3 |! A' n3 A/ F2 Y' H - ctx: ctx,
; A# w! c' g, h! U* Y2 | - isTrain: false,
7 t2 a% [( ^0 i - matrices: [mat],% D7 \( Z3 ^6 i) E- z- D9 R
- texture: [400, 400],
+ S2 m$ h: Q# G - model: {2 d& O$ t2 c6 b$ F3 }
- renderType: "light",
+ r: q% R4 G- U1 {) C- ^5 r# ` - size: [1, 1],
# T- ]) k6 U C, {* Z& b - uvSize: [1, 1]
R( u! Q7 j$ G/ f# R( @, ` - }
2 ?/ K- ^9 ?) q& v: V9 k, X: Z: u - }
$ T+ h, p+ f1 D$ S3 G3 L# G; G - let f = new Face(info);
3 v; `4 x' }7 b( L0 ^ - state.f = f;
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- let t = f.texture;7 I5 o0 C: U4 y( ]" K
- let g = t.graphics;% N' l7 p* V. \& V; p" z
- state.running = true;7 l- k1 r5 R" Y, O
- let fps = 24;$ ^1 t& p7 h) X$ V; D
- da(g);//绘制底图
, Z7 f/ y& w( b - t.upload();
1 ~& I6 |3 \* O$ T9 j - let k = 0;
" S4 r/ ?7 f U8 X1 j* T - let ti = Date.now();; J( s v3 F( q1 y9 I0 o1 d
- let rt = 0;
; q) a" K& G/ D: X. j( L. n - smooth = (k, v) => {// 平滑变化
1 v1 d& z) }$ l7 W7 Q - if (v > k) return k;4 M8 ~7 E+ L0 E/ }
- if (k < 0) return 0;
* x/ i. {4 Z! V/ R - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;, ?4 L( ~6 u% [ N% C
- }
+ G* U3 H% U: P% ?8 Z3 I - run = () => {// 新线程1 G1 m1 R8 T* Z5 V0 N
- let id = Thread.currentThread().getId();* p& u. J& G3 q1 W. [9 D; }
- print("Thread start:" + id);
. x. x; ?, [) Z. x6 c* D - while (state.running) {; D7 t1 [% b3 U! D5 ?; W
- try {+ H" r4 r/ M3 L3 R( {0 l4 i
- k += (Date.now() - ti) / 1000 * 0.2;% D, w. F) b4 z# Y6 i; H7 Y3 Q- f" L
- ti = Date.now();& x: I+ z$ k; t: B- E! Z3 Z+ c, x- {
- if (k > 1.5) {
" |( V8 j% O& O3 {& I - k = 0;( _5 E) G" j0 P) ?
- }
1 K+ ~ Z" ^3 z% i7 G# d - setComp(g, 1);) w0 k& |# a# D; v
- da(g);5 k }1 ^3 e2 m1 j" i
- let kk = smooth(1, k);//平滑切换透明度% t- w! P+ Q( ?3 W
- setComp(g, kk);
6 f5 P2 i* q3 } - db(g);
. p; F4 P, G: Y @- h - t.upload();
: e y: B1 u! J; e1 Y7 K - ctx.setDebugInfo("rt" ,Date.now() - ti);
6 e* B' }% t, K7 C# g' [3 d - ctx.setDebugInfo("k", k);
+ g& q: Z5 `5 ~7 E - ctx.setDebugInfo("sm", kk);
( \% [1 M+ S u$ K) ], I* W1 H - rt = Date.now() - ti;* V- H/ ` h7 x+ m% ^ h2 K# U F$ a
- Thread.sleep(ck(rt - 1000 / fps));* e- v: |; l! ]- w& s" D
- ctx.setDebugInfo("error", 0)
! N+ \5 t6 v$ P$ \' P4 @/ w. k - } catch (e) {% S/ \9 t! U _ `2 |
- ctx.setDebugInfo("error", e);/ B; y6 B3 h+ N4 Q" D5 Q/ j0 Y/ H
- }6 i6 \. y/ y# B' E
- }
5 G& @) n# M& v/ r* _ - print("Thread end:" + id);% y p' Z, G# `( T a9 H
- }
# E, d8 z, p! L, R% V# Q/ t3 n - let th = new Thread(run, "qiehuan");8 m; d$ `7 G {# Z) p5 P7 p
- th.start();
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5 P2 O7 U( U z. H- function render(ctx, state, entity) {( K5 t: ?# [& b2 s0 w0 y
- state.f.tick();
+ s" e2 T' q& x; I# m4 `1 o - }
) ~8 D. z0 H, @& ]
2 w* @" i7 j9 y9 k9 ~2 ~: y9 W% t- function dispose(ctx, state, entity) {
! U7 f1 E4 m( t - print("Dispose");
- N: U7 I1 I; M9 a - state.running = false;
( u; b6 \" F9 o0 p4 W a - state.f.close();
* Y3 p$ o3 Q4 h1 T - }
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- function setComp(g, value) {
# V+ n' f) L( Y. O) f) O: V6 } - g.setComposite(AlphaComposite.SrcOver.derive(value));
7 y4 a+ b8 `# k* {2 Z - }
复制代码 - L1 S( D% {0 P7 p0 I) F
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) F/ Y. L- m, ?( i; H
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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)
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