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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。6 ~: O0 y+ A" Z' Q+ r6 F4 [- {6 A
- importPackage (java.lang);
. |! |% S5 t* ]/ Z9 q+ r3 I: Y% p/ e - importPackage (java.awt);
# g1 g3 f& s2 ]( \$ L1 B# k
' \* C8 U; d, K' L& z; h- include(Resources.id("mtrsteamloco:library/code/face.js"));7 \$ h2 E T# W0 E' G) K
" C' w$ o( ]0 u* z ?* s2 y- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {: m& J7 i( J" Q6 r& l2 R4 b" g
- let frc = Resources.getFontRenderContext();
7 |- ^/ D/ g4 [ ?, {. a5 }/ t, ~ - bounds = font.getStringBounds(str, frc);( }+ V' z4 ?* K2 C, ]
- return Math.ceil(bounds.getWidth());
9 d. V6 J7 ?) ]: ~5 U - }
0 o8 N3 v7 n6 q8 j$ W
7 F, l6 G V$ ~) F- da = (g) => {//底图绘制
7 ?6 D9 f' |& }# [ - g.setColor(Color.BLACK);
5 d! B& V$ Q" s" v1 [ - g.fillRect(0, 0, 400, 400);* A) y# j. A1 w" C
- }: Q1 M5 `) G* a% o a$ B
- 9 V) y: U, B, E1 g& z
- db = (g) => {//上层绘制" b, h0 a3 Y2 w! C# V% ?& ^/ ]+ C
- g.setColor(Color.WHITE);
) ?+ c0 g% h/ r# C - g.fillRect(0, 0, 400, 400);
4 y4 b+ H2 J- {# q2 D) ?' u - g.setColor(Color.RED);5 e" P! I+ T/ k: ]
- g.setFont(font0);5 Z: v2 Q6 `: F' `
- let str = "晴纱是男娘";4 F* T4 Y% w* D |) X1 \
- let ww = 400;, M6 L! p5 ]1 }
- let w = getW(str, font0);1 C' U4 A3 \8 @, a4 h1 J
- g.drawString(str, ww / 2 - w / 2, 200);0 o4 R0 K8 x8 ]1 n# l1 d
- }
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- const mat = new Matrices();
" w7 c+ z5 H* ?, U3 v, \6 q - mat.translate(0, 0.5, 0);2 A. I$ ]7 Q$ r1 O' U7 l4 |, p- P
- ; h& f1 g4 l/ _& l
- function create(ctx, state, entity) {9 y1 V$ @& |& O' o C8 m @* ]
- let info = {
) L l! C4 z. w% z - ctx: ctx,
% A- L4 F- S0 P9 b q/ y" Y - isTrain: false,
# Z" I+ Q, s1 T3 n/ d- _ - matrices: [mat],. d. Y4 h! F5 l. {+ |! d
- texture: [400, 400],
2 h$ K( D7 f& E/ g9 g) m0 y- W - model: {
' p/ L1 v0 H& Z S% q - renderType: "light",
; A4 G& e- c0 Z- Z, t - size: [1, 1],/ @1 k3 B6 e. F% o
- uvSize: [1, 1]
/ ^1 N* X% s9 y& j$ u v) o; B$ j - }
$ G% T# z) _" |4 s+ c ` - }
2 S6 k5 }9 A1 _$ _8 W5 g - let f = new Face(info);3 C# O, |7 ^+ {2 d. M5 ]
- state.f = f;# n6 {9 P% y) _" c! z$ q
" d; C: `/ C2 `6 w" Y" o- let t = f.texture;
& U$ t( M0 c0 L% I" M, X - let g = t.graphics;- ^3 O/ \5 _' e; ?
- state.running = true;4 V& r2 ^2 {6 c
- let fps = 24;
! M, [7 B6 j) A - da(g);//绘制底图
: o) W9 G% p( C- h4 U# f! ]& X9 y - t.upload();
9 K6 {3 ?- N7 V0 m' ~' [5 B q - let k = 0;
1 ^; Y1 J: N4 x* t6 n4 r; } - let ti = Date.now();
8 q9 k* u z- C) m ^. i7 } - let rt = 0;
1 l$ W+ }* b1 d3 u8 E - smooth = (k, v) => {// 平滑变化
- ^1 M% H: h. p - if (v > k) return k;
" [9 ^- {, L1 a+ f0 t3 z - if (k < 0) return 0;0 b8 o- N8 m+ A& U- A& z
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) S7 j6 i z. p) ~; P+ o i
- }
: U3 N' h* s1 l+ @ - run = () => {// 新线程- X8 @# E/ X$ w+ F! K. ]
- let id = Thread.currentThread().getId();
4 G$ o, O {( K2 s - print("Thread start:" + id);# [3 {/ ~ r: _# c. e
- while (state.running) {% U+ {4 m; M* U% v' B9 r
- try { J1 x0 h) m" D5 V
- k += (Date.now() - ti) / 1000 * 0.2;) Q u, B9 @& W, S0 y' l! m) _% Q
- ti = Date.now();% H" S) a X" j# y' M* T
- if (k > 1.5) {
: r* X9 T$ N9 E - k = 0;' G+ h& m5 P6 u1 W; ^# c
- }
" K7 T6 ?5 {: U9 d [! T& P - setComp(g, 1);) H" f& @' K# M2 ^: ]
- da(g);, S4 i$ ]# G m) t
- let kk = smooth(1, k);//平滑切换透明度
1 J& r' v$ k! k+ c% ] - setComp(g, kk);
8 R2 [, T' }" _! W - db(g);
8 W0 s: F, n) E, N- r3 [ - t.upload();
6 x6 T7 {7 ?( a! Q6 h4 b - ctx.setDebugInfo("rt" ,Date.now() - ti);# j- b$ f o1 x3 c1 y5 S; \
- ctx.setDebugInfo("k", k);
+ [' d! A( ^9 D/ U% [5 {! j - ctx.setDebugInfo("sm", kk); C" q# n# p$ | w+ {8 r* @) m
- rt = Date.now() - ti;
4 P% |2 ?2 g) w* S) s& i1 h - Thread.sleep(ck(rt - 1000 / fps));9 \2 t5 {5 G* P0 z Q
- ctx.setDebugInfo("error", 0)& w; a5 d9 s, b) ~' B$ W
- } catch (e) {
6 \3 e1 e+ z, U' ~7 `$ \2 F2 i - ctx.setDebugInfo("error", e);( d" [% Y! u' e' v0 O
- }9 i0 T- z* t# b, a
- }
" d2 S- s6 c2 n9 v# L7 ^3 x' d - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
7 E7 W/ r& C% H- u4 }2 a - th.start();
% `: e, @; x5 ]# P% Z3 p - }
% A& }1 ~0 r. |# C4 o" g
4 G8 e. c( `# `- function render(ctx, state, entity) {
3 c$ Z6 D: p/ C/ G - state.f.tick();
; s6 o: q, s$ }; B- o( }4 y" _8 } - }
4 l- n; [- D' n; w V( Z2 e
* {% A+ n* v% f8 S) I1 y- function dispose(ctx, state, entity) {- j7 |4 J! W+ U& j2 n
- print("Dispose");0 L' t5 I, o' w3 E) W
- state.running = false;
) I, s* \+ N9 g. e4 [8 P - state.f.close();( F- \2 x- ?3 x% R2 D' p. |& R
- }2 U# j& K, g% w/ X- _4 L: d
, \1 R/ U. A. _, T; ^5 f- function setComp(g, value) {8 h8 c8 s, @- v" t" \! [
- g.setComposite(AlphaComposite.SrcOver.derive(value));
. r- V0 c7 P- E% G& ~3 q - }
复制代码 , d9 ]. ?: }' z/ ?( }$ 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。! ]- h+ i4 A2 ^: d/ |
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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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