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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。
1 _8 L8 q5 t( v& b8 q- importPackage (java.lang);" `! n5 ]9 t S& g! D) {$ g3 k
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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5 }+ u+ g; T' T5 {& g/ i. }+ I( J- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
# p6 {5 H) X) t* L5 C
" |; X+ Z; J e9 J7 L: G: J# h2 s- function getW(str, font) {* ?! ^3 e/ c" m+ l7 t
- let frc = Resources.getFontRenderContext();
. X- u& X; n6 D+ h9 r9 n - bounds = font.getStringBounds(str, frc);; j8 W$ ]3 @7 x9 {- e! w
- return Math.ceil(bounds.getWidth());- O9 j8 Q e4 @6 o$ E# S
- }
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- da = (g) => {//底图绘制
. W( q, W9 X9 Z - g.setColor(Color.BLACK);
+ j# ^& m- `0 n1 Z - g.fillRect(0, 0, 400, 400);( i0 E: ?3 l9 P
- }) H4 T p ^/ d* A
' {5 Z; f+ {4 N0 i2 v- db = (g) => {//上层绘制
$ h" \$ U5 L! T3 x$ i+ V- e1 ^ - g.setColor(Color.WHITE);- P; C a; o a# U( z; Q$ c
- g.fillRect(0, 0, 400, 400);
( c) M4 Z0 l. k8 c3 w - g.setColor(Color.RED); P+ h, s3 ~6 A: d0 Y
- g.setFont(font0);
5 [: m7 ]9 b1 {6 `% f5 e - let str = "晴纱是男娘";
' u# o) P/ h: X9 m1 Q0 \1 r' r - let ww = 400;0 G& f' s- ~" z- d8 Z8 f: Q& \. P& s) B
- let w = getW(str, font0);
& `0 E- F- L* j3 Y - g.drawString(str, ww / 2 - w / 2, 200);
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- " p6 f# x( `0 M# b: }( S; t+ M7 k9 r: I
- const mat = new Matrices();% i# g* R& c2 ^0 j5 e! g( W* M
- mat.translate(0, 0.5, 0);$ Y/ X1 `2 i! f- ], o
- + s8 `& q* \4 Q7 `( D
- function create(ctx, state, entity) {7 }% d7 d4 b: k+ @. f. a& f
- let info = {+ @4 w. o" E! s; x' R
- ctx: ctx,5 O* |! d& l1 P; X2 u: A7 j
- isTrain: false,; X2 u" p# P& V4 t. {$ b& U9 V
- matrices: [mat],7 R- M; l# i! W/ C9 E* A
- texture: [400, 400],
" p# |( L4 ]$ S6 O: u5 X5 h, H - model: {
: J* Q _$ l! {) m1 H - renderType: "light",
- ?+ D9 M1 u6 g8 f+ `' I - size: [1, 1],0 ]* a- \( F: c& `4 U) }
- uvSize: [1, 1]' C+ b$ c3 d3 }
- }$ V# i2 m/ G# B( Q+ L$ D
- }
% a. U+ _; r/ e; Q B* x# r- x - let f = new Face(info);
8 o) n0 J# O6 {9 J. o - state.f = f;
% N( T7 C6 G, K3 l% J3 ^) `
+ x5 n/ F3 b' _- let t = f.texture;2 V) O# U0 Y3 |% r
- let g = t.graphics;
% P5 b* m! O1 j7 W, S - state.running = true;
: V) s J* t. l- z, B7 `1 g) T - let fps = 24;2 v: a* D* N7 t4 ^2 [1 p- b+ n
- da(g);//绘制底图
l; S( V; n$ P2 ~# I - t.upload();
+ v3 }8 j) Y8 ?/ x5 P. D - let k = 0;
, h X& F. O, I- y - let ti = Date.now();
% \5 d8 s1 @1 f. H6 ^ - let rt = 0;
% Q* _# ?( x/ w% l9 d, E" \ - smooth = (k, v) => {// 平滑变化
5 r" P) D, j6 u - if (v > k) return k;) k# K* a, @! o% l m+ r
- if (k < 0) return 0;
/ j6 `' Q, {0 `9 H e - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程+ A- V I+ \0 t% v
- let id = Thread.currentThread().getId();9 \+ T! O4 u/ Y
- print("Thread start:" + id);
2 G( h& I& Y1 V - while (state.running) {
; v6 s0 N6 o/ ~! | - try {
1 Q6 c* s, T+ b+ v. b0 N - k += (Date.now() - ti) / 1000 * 0.2;
- F5 Q- e4 Q% z7 o - ti = Date.now();% d& O+ N! X4 [& ]! C
- if (k > 1.5) {
/ s" \( I' b* F1 u- N% k - k = 0;! w* v5 N) [. w' C$ P
- }
0 Q+ D( N$ z8 n8 Q9 X - setComp(g, 1);
# L0 G3 U% ?4 k) x" v5 C5 L - da(g);
% m8 S y! Z- |. e8 T! A5 b$ ] - let kk = smooth(1, k);//平滑切换透明度
0 ~. C8 n7 V( v - setComp(g, kk);
6 c" e: n( [& c R - db(g);) x2 |. ~. e- u$ i* A
- t.upload();* j. S# o/ \/ [& A# y; z
- ctx.setDebugInfo("rt" ,Date.now() - ti);& i9 e% m; }7 W/ v) m# x5 b; [
- ctx.setDebugInfo("k", k);; F* M2 w; Z& _( t: x& |
- ctx.setDebugInfo("sm", kk);
; d! m8 x' r2 O7 ` - rt = Date.now() - ti;
' p2 G8 j9 W6 W- Q" p - Thread.sleep(ck(rt - 1000 / fps));" m T" f B9 c- \) [7 ]# ]4 i" n
- ctx.setDebugInfo("error", 0)
$ ]9 u; g8 }- w/ t& K9 v" _ - } catch (e) {0 y, e, g! o0 _
- ctx.setDebugInfo("error", e);
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- }6 y' v% _$ K+ q7 q0 [
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
: q/ I* R% ]- R) s& ~. I - th.start();' Y$ g( a4 m' l# B n1 N
- }
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+ K# v% `6 L$ i( O4 R- function render(ctx, state, entity) {( E2 T4 f( p/ v$ a. d7 v! r
- state.f.tick();/ _% `9 E) `7 W4 L
- }
% g/ j! `$ s) h1 z4 }+ j - / h# h8 M% ~6 q3 l" {
- function dispose(ctx, state, entity) {+ Z4 q; ]+ x3 @
- print("Dispose");
! s" v9 Y- w. p) X% F! h; B; L - state.running = false;
! E* H4 N5 \0 Y, d' w. ? - state.f.close();
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% F) d# z5 s; j& m4 Z, [- function setComp(g, value) {/ h/ v2 b# H8 E7 |, ?: y! @
- g.setComposite(AlphaComposite.SrcOver.derive(value));" _/ J+ `( S2 }# A: l' E+ S4 e( N
- }
复制代码 & B1 A$ R" T7 [1 z1 |
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。) K3 m h+ {3 L- Y8 R8 {
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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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