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- I( q/ X# Q. i0 y- m$ r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。/ g3 B5 m6 z* v4 Z
- importPackage (java.lang);
9 v+ d/ [8 B! w* u0 R* L7 ?6 @" v+ N - importPackage (java.awt);
8 V, m3 G1 N- {8 J; |- p+ k& k - $ W- v3 q/ b. A. c4 e
- include(Resources.id("mtrsteamloco:library/code/face.js"));! Z$ `0 v8 S) X, u: P
- 7 U' z4 s% l c7 u
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);9 Y7 O. Y- }& [! x
- : n, k P% M- `6 e
- function getW(str, font) {
9 C0 G" Y/ ^7 ]0 x+ ^ - let frc = Resources.getFontRenderContext();3 d& T, i; I4 S
- bounds = font.getStringBounds(str, frc);% w$ _4 H6 y+ J, S& Z0 v
- return Math.ceil(bounds.getWidth());
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- P% `" z- T, u* g9 k( v. o- T- da = (g) => {//底图绘制
, }* U- G: ~' B7 b6 Z# j6 t K - g.setColor(Color.BLACK);, c( h' A2 S( i; [
- g.fillRect(0, 0, 400, 400);
" G8 D8 O: O7 X2 E - }
) a- g! Z/ [# Z - + G: ~+ H% o( D
- db = (g) => {//上层绘制
- S) a/ p- P1 y; M- J - g.setColor(Color.WHITE);/ @' f4 _/ X5 [8 s
- g.fillRect(0, 0, 400, 400);
& E# h; _7 S+ o: g - g.setColor(Color.RED);5 P6 D4 K0 p: v; y, z q
- g.setFont(font0);
( Q( x- P( Y; {$ J - let str = "晴纱是男娘";
9 r/ N, d) O3 F - let ww = 400;
3 l+ q; o( U' {3 F8 _. w - let w = getW(str, font0);
5 b' x8 R2 @. B% N, K# }1 h# g - g.drawString(str, ww / 2 - w / 2, 200);6 K+ ?1 ^- Q5 U8 j+ Z' K
- }
- i1 t8 D3 V" H; h% D
7 F; ^7 c4 Y" T1 K! T: Y) [% }- const mat = new Matrices();
' J# }% Y1 J" S7 V# F2 t - mat.translate(0, 0.5, 0);
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. U8 A2 I2 S9 s- function create(ctx, state, entity) {9 ]5 }2 B) b' G
- let info = {) m) n3 e# b/ O& e
- ctx: ctx,3 Z5 V6 y( M: u* G( O
- isTrain: false,* C! S/ G: `) s6 I9 ^; _
- matrices: [mat],
G- n. ^0 F) Y6 \9 x) V/ O - texture: [400, 400],
: ]6 U7 c% E5 u* k3 R - model: {! G4 B1 Z# d( D! V
- renderType: "light",
: h9 r1 `" q: {! z9 X$ E - size: [1, 1],, I2 u& R# {+ K" c% T
- uvSize: [1, 1]
2 |( f; |* W5 u, Z' }9 X - }
" Z5 z5 G4 X* q: O9 K9 a2 E - }; X! e6 A0 M7 Q, ]6 {- V; i5 K/ h
- let f = new Face(info);
; w+ {! ^ F, k - state.f = f;. m+ {5 V- C8 n4 x+ ]9 _
- ; R3 j" H. n2 \- x
- let t = f.texture;
+ K0 B% k" o- ^9 e - let g = t.graphics;
6 {% V/ W% _$ M" m6 E& K+ k. { - state.running = true;8 |3 Y& c; E6 v% w6 S
- let fps = 24;
, K' ^7 z' t$ T }6 X8 i - da(g);//绘制底图 t: @# I9 f" i! x* c \( F2 ~
- t.upload();
3 c: V5 d# g' Q* r8 t - let k = 0;- ]# }# _: T5 {9 {- `
- let ti = Date.now();- F! H8 F. S* G" f9 R
- let rt = 0;( W. h" m( C9 S0 d; G
- smooth = (k, v) => {// 平滑变化. m- o+ N! q, G/ g
- if (v > k) return k;" }# W( S1 d. ~" N; X0 o
- if (k < 0) return 0;: H- j2 Y* W; P& f1 ?0 p
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) [ n6 V9 }8 D
- }, {# v/ M# {& ~9 i& _
- run = () => {// 新线程
r$ k W, S% w! q- o' h - let id = Thread.currentThread().getId();
x% I( h# R+ `% N8 e( f - print("Thread start:" + id);; k: C i$ s. R% R. \
- while (state.running) {
* W, ]& Z: i4 P( v1 y - try {2 j; ~' A' Z9 h5 u
- k += (Date.now() - ti) / 1000 * 0.2;7 T: }6 B) D# @- L/ L
- ti = Date.now();: K# ?$ t. _& Y: ?6 A+ `1 d
- if (k > 1.5) {
( C4 `9 Q6 k) V; p' o - k = 0;
2 v G M4 ] c3 t7 w8 c r7 J - }
+ M' N2 Z! ~7 C ]9 t - setComp(g, 1);
- d+ E, K; ^# |) o - da(g);4 M% K S X+ _! F e2 s6 _
- let kk = smooth(1, k);//平滑切换透明度
% p+ w; D; z) o6 a% o6 e6 d - setComp(g, kk);
( O& p/ j& p( F; ^' j. F: D - db(g);
$ s- ^0 k% _, b, q' q: q - t.upload();
5 E0 ]: q/ t$ M8 N6 |6 h" `/ @" z, p - ctx.setDebugInfo("rt" ,Date.now() - ti);9 u# H+ O- i9 F
- ctx.setDebugInfo("k", k);
4 V6 k, k; G! X' N/ }4 l3 { - ctx.setDebugInfo("sm", kk);
; ?5 e( w# b Z - rt = Date.now() - ti;
& \0 q% q' x* V+ S6 x, B! k - Thread.sleep(ck(rt - 1000 / fps));( u9 s1 r" T. U+ }' Q% O
- ctx.setDebugInfo("error", 0)
0 m. P# N8 v1 J' Z - } catch (e) {
2 _- V) [' Y! N' Z5 O - ctx.setDebugInfo("error", e);
8 o" a" N y9 V9 P) g - }, \( e# {7 T8 `( X) y9 ~* f
- }
) F+ s8 V+ M' n! |1 j% I3 G8 v/ c - print("Thread end:" + id);
4 ~7 @% s9 b# R3 w$ l& S8 G - }
" G# N4 q9 n$ u. r1 J; H - let th = new Thread(run, "qiehuan");2 |* O* @1 m5 z. R
- th.start();
P0 K, r7 Q. {: ?9 v5 j! ~ - }, x7 N1 B# H# v, ^
- v% O/ N# f/ x+ I! }, ]
- function render(ctx, state, entity) {
9 a9 ?! S+ J( ]; s3 S9 n/ ` - state.f.tick();0 ?) l- H! n# _% s9 d
- }
3 s- t4 D8 d1 P& W - ; z3 Y( G5 M6 I# q& @5 c
- function dispose(ctx, state, entity) {
$ ?6 l' _9 T: C3 t* S# N9 ` - print("Dispose");) @9 Q; q1 d$ `+ c4 R8 R3 l2 l6 [
- state.running = false;
7 T1 r# [4 d) s' t. I - state.f.close();% h" n0 l% H9 L/ j
- }
0 P4 Q8 t) y3 ]; _, h - F: o" `( f0 F
- function setComp(g, value) {
$ H" K/ f7 p5 t( x/ L* m' c$ Z - g.setComposite(AlphaComposite.SrcOver.derive(value));
) W |$ d& c) t2 G - }
复制代码
" g% ~: G7 j4 Y8 _- b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). K0 I3 a' e9 c. S
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