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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 g: t) W/ B3 q" t; {
- importPackage (java.lang);. o. e2 y5 y9 G# z' f4 X( X
- importPackage (java.awt);
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6 N( [1 e- B* a# F+ n7 w- include(Resources.id("mtrsteamloco:library/code/face.js"));
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0 x( O* M6 _4 Q- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
/ W2 P# Q+ D* |$ B - let frc = Resources.getFontRenderContext();
7 _7 d. e, @' d% a - bounds = font.getStringBounds(str, frc);, h% {& C, Q8 {) @" L. ?. \5 N; _( P& y
- return Math.ceil(bounds.getWidth());1 P, Q+ y5 t3 a1 Y7 k
- }
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+ y9 Z) u p4 o. O1 ]- da = (g) => {//底图绘制
7 ?- ^3 @3 W' l9 j. G" m6 i - g.setColor(Color.BLACK); f8 h8 D. `6 C4 W4 f4 Z1 V$ K
- g.fillRect(0, 0, 400, 400);' K5 l2 d9 s2 |
- }
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- db = (g) => {//上层绘制
7 `2 X+ @) B: I, S+ H - g.setColor(Color.WHITE);; Y6 I* k5 X# }9 h( B: K7 b
- g.fillRect(0, 0, 400, 400);
" }0 k( U7 `5 n1 S4 y - g.setColor(Color.RED);3 Q( Q9 T6 k! N) P' X# t1 V9 q
- g.setFont(font0);8 ^, U2 \$ ~; C% w% y6 s3 x7 f
- let str = "晴纱是男娘";
- j, B& _/ V3 l5 k ?; r - let ww = 400;
1 |- @ ~6 W5 d3 Q- X - let w = getW(str, font0);
7 f1 C, I7 X/ l+ P Y! M6 T: P - g.drawString(str, ww / 2 - w / 2, 200);
0 r$ Q+ o+ A* [+ ^9 l9 O - }
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1 j: U" ~+ A: }' f6 l( r6 M- const mat = new Matrices(); `. \! A* W, e% I) q
- mat.translate(0, 0.5, 0);( P% m- E' p9 Q' c2 m' p: I
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- function create(ctx, state, entity) {! }* E: _/ ^8 {4 |1 q
- let info = {
6 R3 }2 q4 {% k* _$ [: j - ctx: ctx,
+ {" k6 F1 `8 _, t# J% y - isTrain: false,5 _; q3 X3 i. x% B' j' x* V4 E
- matrices: [mat],' a+ |8 e+ Z9 T9 |) B3 Z6 v% z. [
- texture: [400, 400],6 F0 Q3 r- _$ q3 g2 k" P
- model: {
5 j8 B/ |7 f$ c! Y% r - renderType: "light",
5 g# E6 T" ~# Y% D% ] - size: [1, 1],
2 s1 j4 \+ i6 n; A - uvSize: [1, 1]
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- }
( V0 h3 v2 C& ]' f, N - let f = new Face(info);: S9 k6 R! `5 P% ~, e
- state.f = f;0 d: x- U# o. M6 d: W
8 ~0 B/ L9 r, V9 i& |1 q- let t = f.texture;
+ f M, s% `5 J' y6 `& o - let g = t.graphics;
/ a' Q8 l$ K) P/ e& N7 D - state.running = true;
9 L: f v" F: p w - let fps = 24;
) [# P/ P, R! F" N8 M - da(g);//绘制底图$ T9 \$ o) G4 m7 O( x* f. j
- t.upload();6 W( t: m+ R5 H
- let k = 0; r9 x/ V3 @# S r, x# F" l# [
- let ti = Date.now();9 a, a* b% {1 B5 A+ S0 Q
- let rt = 0;& l% `7 u9 u2 K- M4 r0 v
- smooth = (k, v) => {// 平滑变化; h9 e# K7 e5 l8 X# F; W
- if (v > k) return k;1 e9 T; g! x- r3 B3 T# |3 @
- if (k < 0) return 0;
5 ?7 h( G- C1 r; b: r: ?" Q1 [1 \ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程# A" i/ d, L' V: v0 r6 |, u
- let id = Thread.currentThread().getId();
. M6 X) h. D& l( ^7 _' Q% I/ d - print("Thread start:" + id);
( M& H( S; k$ }& d) _: W2 z- Q - while (state.running) {9 e/ u& O) l' m. v" ~
- try {/ Z6 J" U% G; g9 Z
- k += (Date.now() - ti) / 1000 * 0.2;
" k* {2 B( ?7 R2 P m8 c, U( t - ti = Date.now();& W, Q# P! r+ T9 V& r
- if (k > 1.5) {
4 o) x3 H; s' f0 x( W - k = 0;
' Y5 k" ~9 {' Y6 F - }
5 o4 D9 `- ^; `! q - setComp(g, 1);
. P' G# O W* F* B - da(g);' M, Z2 p. @4 |* N T7 J
- let kk = smooth(1, k);//平滑切换透明度
% t3 F9 w, z* T& C+ H - setComp(g, kk);& q3 k/ o/ c7 C6 E" g
- db(g);8 M2 h9 j1 c6 m- }# P- f3 T" B7 G
- t.upload();8 r( l- L$ c/ ]+ M% t% }" h4 g3 Y* n
- ctx.setDebugInfo("rt" ,Date.now() - ti);* L# ~7 ]' H \8 ]& l0 W
- ctx.setDebugInfo("k", k);
( B0 l( |3 t* c, W/ h4 G - ctx.setDebugInfo("sm", kk);
& l y: F# C+ Z, j - rt = Date.now() - ti;# x$ L3 w5 Q* |' J
- Thread.sleep(ck(rt - 1000 / fps));
/ E. ?6 `' ]" N2 A, \. s - ctx.setDebugInfo("error", 0)1 Y1 n K; S2 M; p6 x! t! k8 C8 |
- } catch (e) {9 O; {+ N9 C W$ ]& Z: j
- ctx.setDebugInfo("error", e);4 N0 ~% \- J' G' ]
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- print("Thread end:" + id);5 E/ E# a$ ^4 Y; k. T/ W
- }
# Z# i2 e; ?. S7 V - let th = new Thread(run, "qiehuan");7 |; L ^# P Y* ] n
- th.start();/ E) c2 e) C3 h& p5 {/ b' g: D
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( _0 ^( P/ _6 p/ |! _- function render(ctx, state, entity) {
" d4 e3 v4 O. l' u: M - state.f.tick();1 D- G# C" M) w' N1 H
- }
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; X: u0 a) ~; X. m0 j) [8 {& D0 V- function dispose(ctx, state, entity) {
4 D0 k1 n5 D% c. Z; d& |8 s) T - print("Dispose");" H C: r3 v1 `2 z. D1 ]
- state.running = false;
( t8 P# |# y2 r - state.f.close();) q* D; b4 R: j' A
- }
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- function setComp(g, value) {2 N- o7 g/ Z' Z7 O, O4 n
- g.setComposite(AlphaComposite.SrcOver.derive(value));) m" N3 p/ }/ k7 Y' h
- }
复制代码 7 J# B- t: l& E& A# K
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。8 Q+ g% B1 M9 r( ?7 y% t
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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)2 \; Z; Z& d) X+ U2 T' c
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