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% W- D1 V u$ o# 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。
' }1 b0 _. M6 R! m- importPackage (java.lang);
2 n3 O$ O! O+ C - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));* i6 O1 m7 a6 U
+ b: j' d. B: y4 c5 n2 o# ?- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, s2 {9 O9 m, E3 S
- ! P* W4 v0 K a# P& ]
- function getW(str, font) {
3 s; O3 K/ D1 \! F c" q - let frc = Resources.getFontRenderContext();
7 k4 M0 Q4 N/ ]4 D0 N1 m - bounds = font.getStringBounds(str, frc);
" b, ^( I: `+ X4 b - return Math.ceil(bounds.getWidth());3 O9 `- \1 ^1 F. Z/ Q9 q" r/ E
- }' z. @2 Z) E' j
- & S- S' B! k( A `
- da = (g) => {//底图绘制 e/ |5 s! ?7 d& z# p
- g.setColor(Color.BLACK);/ o3 ^& ?7 g) z* u7 J1 u- Z
- g.fillRect(0, 0, 400, 400);
$ J; p! ~1 q6 F' |9 l0 b! Q - }
1 A3 {' D5 a/ |# [$ k - * Z: t) e: c a. Z# {
- db = (g) => {//上层绘制4 X. G! D+ \. O# `9 Z. d+ U
- g.setColor(Color.WHITE);% D m$ t+ g7 F* {' C3 S7 ]$ |
- g.fillRect(0, 0, 400, 400);
2 {* O9 Y+ D. x - g.setColor(Color.RED);& I4 u& e3 r( v) N$ G
- g.setFont(font0);
7 g8 l4 b6 v$ i! k - let str = "晴纱是男娘";
" Y c% m. W4 g1 B4 g U% C - let ww = 400;1 X+ p% \4 v* g& D# y3 A4 u- T
- let w = getW(str, font0);
?7 q( {0 Y: g* l0 q/ z2 t - g.drawString(str, ww / 2 - w / 2, 200);
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% p# E* ?9 x/ c. m' a; y- const mat = new Matrices();3 l3 C% c6 H% Q' F4 p
- mat.translate(0, 0.5, 0);. ?5 V$ X4 ~4 N8 }. B; t
- % a1 B6 O; @( o& g; _: ^1 ~
- function create(ctx, state, entity) {7 b# L L* C" `0 v! R
- let info = {
0 g: z' u! p% J- k! L- z: I6 \5 z! F - ctx: ctx,
' d& _: m: T" T4 M - isTrain: false,4 ?! o# ^1 |8 K9 K# F" v" Z2 ~
- matrices: [mat],
" E# k; c6 l- J! D+ f9 L7 ]" F8 m6 o - texture: [400, 400],
; z; @! E9 G) _# H: G' @. y1 R/ {+ { - model: {
0 J8 J' ?9 N. w. I" M/ ^ - renderType: "light",) l' N9 [) O* l/ y$ ]
- size: [1, 1],
y: C: j' s9 w" b - uvSize: [1, 1]8 F" [2 _' i: s, _# F9 P
- }
+ Y& h j" z, c2 a - }
2 z% _- Z7 s. b4 c. Q6 L - let f = new Face(info);' W R1 `3 `/ t" N! n( E1 u
- state.f = f;' g% ?( ? ?3 e( J3 k! a' K5 i# w
- ' I8 X& v+ m! m! c. w9 m$ D# C
- let t = f.texture;
, w9 P3 }. F4 G! ] - let g = t.graphics;
) r- f' @( ^1 l5 m - state.running = true;: o+ O2 s6 X9 T% d% H
- let fps = 24;
, w" e$ D' J) L9 H - da(g);//绘制底图
! b- J9 C6 H8 S. W/ \9 v" ~' ~: t" B - t.upload();7 l$ T9 ?# o5 ^& q- U' d
- let k = 0;, c, E1 i) g3 }* i7 m
- let ti = Date.now();
" q/ p+ V+ C& a7 x( N T - let rt = 0;. d" K* T2 u/ k J; K
- smooth = (k, v) => {// 平滑变化
' s/ r6 o4 y. q, ?' m8 Q6 N - if (v > k) return k;
4 x. I) q) a" u) e4 {0 |) N - if (k < 0) return 0;
|; v1 b- S" s. ^$ C& k - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
" w" }: |8 S" C! x - }
8 q' }- {# Y& ]3 O - run = () => {// 新线程
6 }( i+ n/ q( b. M9 Y) r- @ - let id = Thread.currentThread().getId(); ~5 ^' y: R v1 g
- print("Thread start:" + id);# g8 @* L& R) b/ p9 P: O; P
- while (state.running) {
- @0 O" \, c# k - try {
, _/ Q, E" o0 i9 h7 W - k += (Date.now() - ti) / 1000 * 0.2;' D# g8 o4 b. s4 K* c
- ti = Date.now();
5 J( W: {5 u# c% T% v- [2 o S - if (k > 1.5) {- h) w( Z+ b* l7 N
- k = 0;) D$ Z' I8 E( Q( n( _+ ? Y
- }
$ J% w0 H3 P# C( ~' f$ n - setComp(g, 1);
" v8 W' j2 }) W - da(g);
8 S6 I" M. ~5 L1 w" C, \ w$ x% C - let kk = smooth(1, k);//平滑切换透明度+ V" v5 _) P4 J I3 `
- setComp(g, kk);1 d! m0 Q4 L+ ~! y7 ?& m6 \
- db(g);
3 x# _- s4 J8 [, j; ] - t.upload();
' E% p2 F3 f4 d9 I9 X+ w: r6 } - ctx.setDebugInfo("rt" ,Date.now() - ti);
* v7 ?4 n3 J8 U- f& u: O. y - ctx.setDebugInfo("k", k);
( X h8 Q% v$ z) a# b6 \ - ctx.setDebugInfo("sm", kk);
0 N r8 S2 M* }4 n N - rt = Date.now() - ti;; L- C# N0 P! w0 E: O4 R% v
- Thread.sleep(ck(rt - 1000 / fps));
' i% f5 B+ z( q- L( U. g - ctx.setDebugInfo("error", 0)
; a: [1 j9 I5 u I6 \5 U& ? - } catch (e) {2 e8 U$ X J$ e
- ctx.setDebugInfo("error", e);
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- }# u. g! I L* I* b
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
$ i$ Q7 ? V7 b* ~/ I! q - th.start();
" H5 a' ^" N2 d* R& R9 z+ b7 f6 z - }
, M8 `9 V* E( s
?' d0 }# H& ?+ t- function render(ctx, state, entity) {
+ q% |9 k9 Q. F! T$ u- A - state.f.tick();
1 [" s g/ \* g; ?5 ]2 k' i - }# [3 y; Z2 b/ `: Y& d
- : \! C: n, O9 E5 q
- function dispose(ctx, state, entity) {
, Z. ^* l- }! ?- b - print("Dispose");
3 w2 L3 p* X* U - state.running = false;$ T, `- O2 g; H5 t( D/ r
- state.f.close(); d: R1 ]9 U& `5 |( Z
- }
" r( H, C+ l4 u+ Z+ ^6 p4 D H - : h3 I! O, Z: p# Y( m O: T% @% ~8 D
- function setComp(g, value) {
# P7 U, W5 V5 S: t0 I2 y' j, A" C - g.setComposite(AlphaComposite.SrcOver.derive(value));
8 _: O- R! c; S7 [ - }
复制代码
. a4 `- X4 v+ R' i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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