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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。& A8 \8 P& ^- s' |: r! K, f" }
- importPackage (java.lang);2 \' S, _7 [% u! p" v
- importPackage (java.awt);, g& E! [# o% t1 t& x2 I% m! K
- 3 w. W: d& K/ V
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- I, l' K) o+ S6 g. [. R$ b, q! ~- function getW(str, font) {8 |, `% h! c* q6 S& `! d0 c5 y* m
- let frc = Resources.getFontRenderContext();: G- H- N" w+ R9 `0 A
- bounds = font.getStringBounds(str, frc);" H$ t4 O+ `3 t7 f* t( t
- return Math.ceil(bounds.getWidth());
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- _& O$ n8 K0 D' w
- da = (g) => {//底图绘制
' {3 x$ U ]: S5 C! y# ^ - g.setColor(Color.BLACK);
9 K3 L% {0 u/ Z - g.fillRect(0, 0, 400, 400);6 B, ~) P, ~3 x3 [3 G+ Q; m# b
- }* b V; l A* B1 r1 u, ^: j# D# d, B
- 2 k J! N5 l, Y- l
- db = (g) => {//上层绘制6 [" m. z4 b' ~' S
- g.setColor(Color.WHITE);4 g+ _- a: K' }3 [
- g.fillRect(0, 0, 400, 400);
* H& c0 q/ u. E. I - g.setColor(Color.RED);
/ x1 K8 V/ x8 Z) t0 |0 F4 R - g.setFont(font0);5 C: K, A0 @0 k: B2 S5 t6 j% e
- let str = "晴纱是男娘";( L: d4 z4 {8 i# c: O+ a/ O* V
- let ww = 400;
& G# q/ M$ i" F% i3 y. { - let w = getW(str, font0);
* a7 `5 X% m0 v7 H' ?3 c - g.drawString(str, ww / 2 - w / 2, 200);
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- ' l0 c) P4 @- b+ f3 z& I
- const mat = new Matrices();" l# G5 T+ ?3 `7 ^$ ], o# ]
- mat.translate(0, 0.5, 0);
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$ l" A8 R1 X2 u; n* E0 \- function create(ctx, state, entity) {
, U0 a+ s, S3 X' @4 k. \3 } - let info = {
( Z0 W1 i( {# j* Q8 n - ctx: ctx,# Y+ C c4 I! W, { c
- isTrain: false,' V, |' I2 w' X- v
- matrices: [mat],/ W8 I2 Y4 Z7 h3 ]# W# ~, f
- texture: [400, 400],4 V" l$ \, q3 V- Q* V: O+ E1 ]- \
- model: {: {) n4 D% B% ~, W! U5 w
- renderType: "light",4 }5 n! A- S3 G; O2 C- ^
- size: [1, 1],
2 @8 U7 Q* n6 K% R - uvSize: [1, 1]
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- }
1 g6 K4 G5 C: T- J - let f = new Face(info); u7 h' V2 U! C B* i
- state.f = f;% j# b; v, ]4 p. J2 K
; o' ~2 ?. p% w/ `2 N- let t = f.texture;* d( b! j" Y5 |
- let g = t.graphics;
3 j1 L* u8 Q1 [$ K8 @, w7 X3 D$ L - state.running = true;2 U9 k2 h6 j6 O8 ~
- let fps = 24;" \/ G, \$ l! { [
- da(g);//绘制底图
. T1 f' Y1 Z0 n - t.upload();
2 |* [4 g! D3 w- i - let k = 0;4 e# p+ J/ L5 S* C6 b. c$ L
- let ti = Date.now();
1 w( T- }1 X' T; ^2 T' a; {, N1 w6 t - let rt = 0;
1 F. ^5 h3 D. L' M2 m3 S - smooth = (k, v) => {// 平滑变化' s4 k% Z; u0 M) }! S1 M. U; k
- if (v > k) return k;9 @& m) Y( a' K, b* G
- if (k < 0) return 0;
" x+ M" f7 r' a7 m# h" X2 S; ~ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程% e+ r% a" E/ @. @+ a
- let id = Thread.currentThread().getId();/ d/ A0 B' y% `5 I+ \0 B6 m& H
- print("Thread start:" + id);
! {2 T/ k8 k* u8 B2 W. u, g, H/ i - while (state.running) {
$ F% [( X- H& W3 F( U8 q+ p - try {1 x D* q3 p7 m( |
- k += (Date.now() - ti) / 1000 * 0.2;' B: q: h7 N: L; a$ O2 f0 a2 r
- ti = Date.now();
1 J9 m7 l3 |9 T5 L M - if (k > 1.5) {
% R: i/ W2 O; `( F) T# x - k = 0;. C7 d/ K3 D9 _+ ^, u6 c( y
- }
' V, h F4 \( @0 P1 o0 U/ P6 c8 f! e - setComp(g, 1);
# L. l2 @" `4 G - da(g);
- k3 c2 b2 k* j) |3 t1 v* K - let kk = smooth(1, k);//平滑切换透明度
$ i( H+ F" e& q, C - setComp(g, kk);
5 ]' Q# H5 F; r - db(g);
/ G: j0 a4 v2 [& I+ ] - t.upload();- v' T; C: N( @. `
- ctx.setDebugInfo("rt" ,Date.now() - ti);4 A. a3 G# X* k: ?+ \) ~: a4 U* _
- ctx.setDebugInfo("k", k);/ q1 D9 S7 ^/ W
- ctx.setDebugInfo("sm", kk);
! p0 r9 f4 I5 e+ S B( n - rt = Date.now() - ti;; |* @( D* P/ o7 @
- Thread.sleep(ck(rt - 1000 / fps));
( _( ^# z, @# y& ~( h5 `5 [ - ctx.setDebugInfo("error", 0)7 \( i) z: ]& q8 ]* M4 M
- } catch (e) {
4 W) h( q' b& { - ctx.setDebugInfo("error", e);
, j$ H5 L; Q g - }
! \* q6 q: l& k7 y3 \ p - }
' C1 K' P1 U7 u4 v. D5 Y) g - print("Thread end:" + id);
; q& a% I- x1 W- k' w. `$ i; n8 l - }
1 _7 S& @7 p3 _ - let th = new Thread(run, "qiehuan");
2 ]; u, Q9 c! t9 t i2 @ - th.start();, r, q4 K1 p V/ X1 Z
- }
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- function render(ctx, state, entity) {
3 J: ?* J; z/ x3 V" X - state.f.tick();2 ]. k% a8 o- \5 s8 D, D9 W
- } g$ y% n( d0 D: L' o; C$ n8 H
0 s( j1 G+ N" r8 W( L% x- function dispose(ctx, state, entity) {
7 [& Q( j: B% A" Y# |- F - print("Dispose");
/ L# r4 ^) \8 W( d% ]& b - state.running = false;
" G/ C6 T; `4 W- f - state.f.close();
9 C2 t' O3 b7 H/ f( N& i9 A& O8 ~- B3 G - }
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& A' a9 x B8 j8 ]! m- function setComp(g, value) {! X, G3 X3 Q# E, ? R
- g.setComposite(AlphaComposite.SrcOver.derive(value));
* e' S/ D; P) d4 `/ Y6 o2 z - }
复制代码 0 Y4 ?6 a- [$ A0 F; n3 m* D
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)* J) Q$ w" J- j
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