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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。
) |4 H5 _% C5 f8 C& c2 X- importPackage (java.lang);
# {" [% e- m5 y - importPackage (java.awt);
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& H/ ]( r% o0 Q; V: R- include(Resources.id("mtrsteamloco:library/code/face.js"));
9 W# J" M; d T1 V - / m! f, Q; E1 x) S( p, K2 V" {
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. q8 z4 }% `# @- J l
- 6 j c$ r& [& {9 I. ~6 S& ]2 {
- function getW(str, font) {. j; r! K: w2 ^. @$ u5 S: G4 U
- let frc = Resources.getFontRenderContext();; i9 z8 E2 |/ b
- bounds = font.getStringBounds(str, frc);) {8 w. Q; ^( W7 ? W
- return Math.ceil(bounds.getWidth());
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8 @: S# C8 Q2 \" p- da = (g) => {//底图绘制
6 G4 S- H* a5 D/ R7 L+ c5 g3 v - g.setColor(Color.BLACK);
* O2 }3 m( p3 ^% G - g.fillRect(0, 0, 400, 400);
1 T+ K' v7 y+ N4 l - }
/ a5 F0 h) U1 v% l
* [, O# e$ o ?- db = (g) => {//上层绘制
: N: n9 {4 l4 s& D- k( [ - g.setColor(Color.WHITE);
3 O+ c c. H% \8 [& ]5 z. Y( h - g.fillRect(0, 0, 400, 400);
% ~' D/ u& q9 M% R5 _4 s4 S - g.setColor(Color.RED);, C; \ q4 ]9 B7 |# J8 \5 p& B& y
- g.setFont(font0);
+ O1 {# F# t0 Z. J" C - let str = "晴纱是男娘";8 _" v" ^# w, q8 p+ U/ c4 o% l+ ^
- let ww = 400;
& d) \) A8 f# O! t5 e1 D3 b+ p - let w = getW(str, font0);; S) J1 g2 ]8 {% E; i- N$ X
- g.drawString(str, ww / 2 - w / 2, 200);
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- v/ C. o( p6 J) ~+ O) l
- const mat = new Matrices();$ z6 Q: p: N- Q: o1 Q: O, g+ X
- mat.translate(0, 0.5, 0);
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$ e- F0 T9 K+ b2 |# i+ N. ]+ Y) m- function create(ctx, state, entity) {
! Y0 `5 u4 r4 @+ k - let info = {
2 H C: N) j( ] p% ~ - ctx: ctx,' ]( L: J2 ~& ~3 S' D& m+ |
- isTrain: false,
$ |. ~% M$ m" L2 m4 p6 F& O - matrices: [mat],
6 T2 t% P5 j2 f0 ? - texture: [400, 400],
& X. o$ Q- j3 j - model: {6 T* }% r! }; W0 Q! r- a3 L
- renderType: "light",
) }# l7 S3 ? W7 p# P - size: [1, 1],6 \9 }* J1 x |' x8 y1 [
- uvSize: [1, 1]
3 B; o8 z8 @3 u- q - }1 h a. a* }4 f
- }
% A# i7 y `2 O: e5 z x7 L& I - let f = new Face(info);
' ?8 o. F3 b0 q1 ` - state.f = f;
" D; \" z. B: x. P
8 Y% G3 ^: `2 H- let t = f.texture;
9 W! D9 F; q/ W5 a) r7 S$ l - let g = t.graphics;
. n V1 w$ @/ i( |! T3 r - state.running = true;7 o5 a- p, ^$ \# N4 W+ ?7 A% S
- let fps = 24;
! u/ O4 O+ p* q$ t% J - da(g);//绘制底图& @# k. P' o. B6 V _: K/ ^
- t.upload();
$ s# N& @# z' h1 P) G# k& l( e Y - let k = 0;
" b) c- @; S, O4 W4 w# e7 ?* D - let ti = Date.now();
; J2 m' Y3 l3 A - let rt = 0;+ u4 a( c- z4 v+ _
- smooth = (k, v) => {// 平滑变化% \9 K9 b& x5 v$ k; L; {/ [
- if (v > k) return k;
% p' n9 m9 A8 k/ s. h5 Q# E - if (k < 0) return 0;! _- |9 X! p. G+ z+ ~ ?( A. K4 Q
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;8 U% v" E9 L: P8 }0 k
- }
/ k" P! S# B6 ^% W. Y( L - run = () => {// 新线程
4 O# G/ p5 d! m/ e! s - let id = Thread.currentThread().getId();
/ D: `# I4 Y0 N4 L5 J - print("Thread start:" + id);/ C, J: n' d- l$ u. }* s0 d; d0 J, Y
- while (state.running) {
$ v9 |0 ]% ]! \$ s5 C - try {) G6 r" Y; _' N/ E: W2 E# F! o
- k += (Date.now() - ti) / 1000 * 0.2;
1 i9 b$ Q0 I7 d - ti = Date.now();! }6 ^8 k! j1 g4 ~
- if (k > 1.5) {
6 @+ i/ H& a& c# a) D1 w - k = 0;
# a, J) H2 L( W" ] - }
3 m8 d+ E+ p) M: `9 Q3 a' @ - setComp(g, 1);, U8 `- O. P4 D- W: O
- da(g);
+ k" K- ]7 [2 i5 ~ - let kk = smooth(1, k);//平滑切换透明度
, E9 M. a9 d( Q) C0 r0 l/ m. ]9 v - setComp(g, kk);. a% |1 [1 c) l1 [
- db(g);6 m. T5 B( V4 T3 `& ]2 y
- t.upload();- C$ T; f# O9 g, p) @$ Z; i: n
- ctx.setDebugInfo("rt" ,Date.now() - ti);
0 o7 j# X+ H1 B - ctx.setDebugInfo("k", k);
: h3 M# v9 B* f! ^2 h, F- Z - ctx.setDebugInfo("sm", kk);
6 X0 r7 \0 h/ o; U& c5 C+ A - rt = Date.now() - ti;
L3 w9 b6 Y5 u6 M0 N% U& A% \ - Thread.sleep(ck(rt - 1000 / fps));
2 u3 b. P9 V+ O- _/ @) } - ctx.setDebugInfo("error", 0)9 x/ z; ^" G0 W
- } catch (e) {
. W. z1 ?" w% g - ctx.setDebugInfo("error", e);
; ]" Y6 @4 ^( c% |" m9 I# T - } ~5 |0 t! D# M$ k! V6 Z* ~
- }$ l5 d6 F$ u, N+ f$ ^
- print("Thread end:" + id);3 N; v$ ?) [ f
- }
" }* a" ]0 c' y) l7 l# @ - let th = new Thread(run, "qiehuan");, \& |* `/ [7 e6 W( {) \; p
- th.start();! r$ ^3 g( k$ T2 X
- }
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( ]7 t, ~( _& C. i# R- function render(ctx, state, entity) {
, {7 h% a* w6 e Y( l5 l* D - state.f.tick();8 c3 D6 I: V& c) v [
- }
- f3 B2 D8 c& ]& Y* j2 b - * O$ A9 {3 M7 H6 y. }
- function dispose(ctx, state, entity) {- a. F; M, x" L: u
- print("Dispose");8 n T- b9 N5 c& q) h4 r
- state.running = false;1 n* q7 r) i) L' M- C* t' F7 ~, K: [
- state.f.close();0 N1 t, ]/ i" Z- Y: p
- }
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* `: j b" }: j% s% L" M- function setComp(g, value) {8 C0 D. n3 K. K6 \9 B
- g.setComposite(AlphaComposite.SrcOver.derive(value));
% s8 u6 I1 `( | - }
复制代码 9 e3 l7 l# q) p2 T& t
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。# r* B/ m2 s* F9 `4 q- i% {
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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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