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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。2 e r9 e) k* v# ]1 E# J+ d
- importPackage (java.lang);) s m* ^& s# I$ i" i
- importPackage (java.awt);5 p5 H( L5 P7 T! v' O1 A2 U+ B+ |
- 1 v( a% b- j5 n; Y
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);% O/ _6 h: f& j
1 ]' H6 W& z9 J- function getW(str, font) {. g( \ e8 ?& ~& ~) G4 m
- let frc = Resources.getFontRenderContext();
7 W& S4 f, K4 V) s0 \ - bounds = font.getStringBounds(str, frc);
: l" W3 l ~: x( S4 J - return Math.ceil(bounds.getWidth());: Q l. P) [7 H$ ^
- }; N, @- u# l7 s# i
" D! W0 H; s, ]0 G0 `( ]- da = (g) => {//底图绘制. R- a; o$ E. _4 D. a5 Z
- g.setColor(Color.BLACK);) m7 \7 Y4 G: H: h+ P! U$ G. {7 g0 v$ q
- g.fillRect(0, 0, 400, 400);
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- 2 L5 W- v" ^+ l; L. K
- db = (g) => {//上层绘制
[; P; g' {5 G! S( [ - g.setColor(Color.WHITE);
% a4 ^9 e5 @$ s5 R) D& {% u, O# h. ? - g.fillRect(0, 0, 400, 400);. a- O; N# `4 w# e" D r
- g.setColor(Color.RED);! C6 j+ b0 s( o4 I2 O9 k
- g.setFont(font0);
6 k9 F7 u' R- l* K1 K - let str = "晴纱是男娘";
: ~6 B1 k$ `; g b0 \1 X6 e) `8 w9 d - let ww = 400;
7 E! V r. z) w1 s5 w - let w = getW(str, font0);
/ L! _$ U4 F/ ^7 R( s8 b& y5 ^5 R, [ - g.drawString(str, ww / 2 - w / 2, 200);
% |' ^9 i: T/ w9 i8 x% y - }
% U- ^# u3 ^; t8 y/ u: h3 v - ! t& P* p5 q v" _2 {) {
- const mat = new Matrices(); L. Z* p# G, Z0 j5 \) u
- mat.translate(0, 0.5, 0);+ n8 l" f" c0 z9 z; O
- ) ^ \7 H3 A) ]! m, G- n, b# @
- function create(ctx, state, entity) {
X: D5 G5 r& Y. I; P; Q - let info = {
' k( Z9 b- Q: B7 a8 |4 ` - ctx: ctx,+ d) q& g. q. Y% E0 k7 p
- isTrain: false,
7 T2 y: T. M5 C6 C6 F - matrices: [mat],
2 ^2 J7 \" x$ |, {0 ]. T b2 j - texture: [400, 400],; F$ ]& K& ^- J0 L
- model: {, _6 y; }7 E8 s c8 {' S) u2 s$ F, T/ l1 P
- renderType: "light",$ U5 q$ u4 P( H$ b5 l: w
- size: [1, 1],
5 g4 `6 r% Q9 C: S& g - uvSize: [1, 1]' Q8 E( Q2 o( S
- }
3 Z7 k* f4 L2 V4 D$ w - }4 _& B, m7 e, h6 I: i- q* W0 n# _
- let f = new Face(info);
( n$ V" M7 {1 d+ k: I7 n7 l - state.f = f;: |- g& d1 a" E$ \ A a
- " }/ C: G5 J7 g% t) \1 Q. S
- let t = f.texture;7 @% X, w$ n5 p/ s" a" J
- let g = t.graphics;) {) ? c+ T: b/ M9 m* Y1 m5 N
- state.running = true;7 ^) J3 v! T% \7 f
- let fps = 24;! n5 ~; {8 c6 a4 ^0 [& P9 Z) T5 I
- da(g);//绘制底图
! }$ J6 P* W; @! W1 L9 \& U - t.upload();/ D X& N9 M- V9 s5 m0 t
- let k = 0;8 z' z6 {' Z* h9 X/ k
- let ti = Date.now();
4 P/ b5 j+ o8 j, X8 D7 H - let rt = 0;4 R' ?0 x1 K4 p1 b
- smooth = (k, v) => {// 平滑变化
% y& }; ~" S! [" Y9 s6 w. G - if (v > k) return k;
. w, g7 ~( V R# v7 T) [& k - if (k < 0) return 0;/ k) ^0 S ]' g6 v$ m! ~2 w* y
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;& q5 s' W" F1 o/ `# V' l9 u
- }
& }0 g8 ^5 ?- U0 ^1 J" L/ a - run = () => {// 新线程3 V( B9 x0 G! Y+ \# n2 _9 C
- let id = Thread.currentThread().getId();
. r! d) b- q' a2 y4 U b - print("Thread start:" + id);
' P+ O2 a: X) O6 e; B) g; e+ C5 f0 F: m - while (state.running) {
* `+ w+ u: k. Z9 u/ \* {' E - try {
# A+ Q$ {% ~2 }2 D O8 L3 ?/ W" p - k += (Date.now() - ti) / 1000 * 0.2;5 v u6 H4 |% k8 i3 G) c0 n
- ti = Date.now();# w/ Q# a+ i/ S+ ?! t
- if (k > 1.5) {, P! r1 @9 @0 J, Q1 O/ O: }
- k = 0;
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- setComp(g, 1);
?5 r: S/ ^. E; L0 n - da(g);5 V9 S& s B$ m3 R& ]% n
- let kk = smooth(1, k);//平滑切换透明度
v$ Z. M+ S2 P5 L - setComp(g, kk);/ ~3 C# v' X/ h2 M8 T' ]( s
- db(g);
1 f& _( p2 r6 l; p - t.upload();/ i" f u4 b. L/ d
- ctx.setDebugInfo("rt" ,Date.now() - ti);% V$ F5 _7 E1 S( u! }9 ]2 w, ?
- ctx.setDebugInfo("k", k);* C& O" G o) Y+ \
- ctx.setDebugInfo("sm", kk);
( b8 U) A. p$ n, b4 X - rt = Date.now() - ti;% |$ _& n1 a+ I8 M( e0 [& ?
- Thread.sleep(ck(rt - 1000 / fps));* q, |0 p) ~9 O) X X; r8 u e
- ctx.setDebugInfo("error", 0)1 d3 F3 k6 L. H% i' a
- } catch (e) {7 J+ f2 h! t) L O: K {# X i
- ctx.setDebugInfo("error", e);
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- }- W$ _" Q( w: P3 M V
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");2 [$ j4 ^/ d" x/ ~9 ~, W% Q9 N3 V
- th.start();
& Q' A, m8 M' W. B5 P - }
# ^: O6 [& E! ] - : v/ p# T- \9 ?* o4 @( }# F) {
- function render(ctx, state, entity) {
" q( d* u+ L* n% e( t3 H - state.f.tick();
d8 a2 y5 g8 l1 `4 N - }
5 s5 U8 C* `) }0 @ - $ J4 O" {/ G$ f+ ]
- function dispose(ctx, state, entity) {
5 B5 z0 t+ M9 R# @6 m - print("Dispose");" J) K/ `( M& I6 b
- state.running = false;
# Q. T# }1 z M: `# [ - state.f.close();
$ X: z( P, b& { ~( L - }
* h' }) ^# q. h7 p
8 I2 O6 f5 v7 ?! x0 I7 @- function setComp(g, value) {5 Y" A) E5 c) r
- g.setComposite(AlphaComposite.SrcOver.derive(value));
$ `( p+ }# S2 U; C, |% O+ C - }
复制代码 6 h( h# C- i1 e% M
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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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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