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+ y2 C! N- B, N' N- G$ n8 T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。
9 r+ s1 P- c. [9 _' X+ s) b3 r5 ?- importPackage (java.lang);0 A/ l1 g, |# d
- importPackage (java.awt);: |( _* {- R- F; {+ e
- ) S6 P& [% `4 O
- include(Resources.id("mtrsteamloco:library/code/face.js"));! Q2 ]% a0 X7 A2 g' x( a; H+ a
- r6 a( O: Z6 L! n* v: c. _
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. d$ B4 Y& h, [8 o
4 D& k( P# f+ q/ Y* a! f. H- function getW(str, font) {
2 y# g& H4 T, s2 ?, f: W/ m - let frc = Resources.getFontRenderContext();0 J' V* S% U l" t
- bounds = font.getStringBounds(str, frc);4 F6 O: P" M3 c2 f+ y1 p
- return Math.ceil(bounds.getWidth());
g! W7 F3 o& ~3 y/ N - }" m3 X4 I1 |+ p- {! v2 t3 i5 O
- * G* o- I4 G) f B# J' T
- da = (g) => {//底图绘制
. ?, Z% D5 `/ R1 ~1 G) R - g.setColor(Color.BLACK);
; z; Y1 n# X/ N$ k ?% p - g.fillRect(0, 0, 400, 400);8 y( X" b4 ~) w$ |9 W0 b2 W! r
- }7 n* u; k1 |) x4 x4 l/ k0 {* {
8 t1 s. Y, x! m- db = (g) => {//上层绘制+ {' H$ Y2 T3 F
- g.setColor(Color.WHITE);
9 C5 g; c( [, d% h: ~( m, _ - g.fillRect(0, 0, 400, 400);" |/ B9 _/ v+ V
- g.setColor(Color.RED);- _+ n4 C7 w) c; @& g% Y
- g.setFont(font0);& _% e3 B4 s% v: `% _
- let str = "晴纱是男娘";7 G2 V! @* d& M3 A0 T
- let ww = 400;- e; w) J0 H4 X& g/ B; a
- let w = getW(str, font0);
2 }$ _* j7 }6 x$ G5 D) O8 D+ l: t - g.drawString(str, ww / 2 - w / 2, 200);
8 ^5 a4 j, h1 O" \ - }5 Z; s" @+ _ A) A7 y: x$ _* p+ Q3 S& {0 N
* M# v" I9 e- J: S- s! Z' B- const mat = new Matrices();
% y8 g4 h+ L: x- Q# z - mat.translate(0, 0.5, 0);- L' S8 k1 ~- |0 d4 R
4 c6 ]5 p$ r9 s% D4 N6 D2 V9 f- function create(ctx, state, entity) {
, |' u6 Q) n) b: y9 k. i5 T - let info = {
/ X% {, z* X; e' _0 ^7 Y, b( a - ctx: ctx,6 B& Y* f3 Q7 z0 |! P, c1 g0 b l: k
- isTrain: false,
$ L: [ `4 F/ L4 w+ n( X" H- b - matrices: [mat],
7 O9 I1 V: ^2 Y - texture: [400, 400],& b+ X$ _3 D4 B# @4 e* m4 t
- model: {
+ C2 G8 Z: q4 L$ W - renderType: "light",
7 a1 S3 e5 }5 R4 ~% M. i" W! M - size: [1, 1],0 A# G0 W/ @8 r
- uvSize: [1, 1]
4 U6 [ E! F% d- I8 W - }
( h* U) D K2 S& u - }
; Z& l7 V) d- U8 H - let f = new Face(info);
# D+ {; M9 g! }; O* o" R - state.f = f;! Q! j% \+ J x/ r+ Y( N; Z
. j; {' O% C7 x; t. _# l- let t = f.texture;
! v! K& S' H; K# m e. i - let g = t.graphics;* x. a ~9 d! V, q f% I3 \2 W, J
- state.running = true;
. }+ S6 C- \: B+ ?5 S# R' U - let fps = 24;+ C% T+ ~3 F1 o0 ^- V. j4 {
- da(g);//绘制底图: G2 n, H/ [. u4 P* G, d ~
- t.upload();
S/ V. ^+ s5 X# E% p* f - let k = 0;
$ N C7 f- v+ `' f - let ti = Date.now();
% c: V4 z$ h! m" ? - let rt = 0;
( w0 S/ f9 s5 d) H# x6 o: N/ P - smooth = (k, v) => {// 平滑变化/ C r$ p! `" D
- if (v > k) return k;
% e. r' k- o* ~3 G - if (k < 0) return 0;
2 V" p5 B- |8 c8 e8 ~) V! }0 a4 K - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! \3 u: u g7 X8 e' a; U - }
+ @- H+ g$ B+ i - run = () => {// 新线程
! H$ m2 Q0 Z* Y6 N$ \2 F* Z - let id = Thread.currentThread().getId();
6 t2 l! ~$ Z2 i% v5 Y0 J - print("Thread start:" + id);( t" w6 |5 |' w/ X, w, ]
- while (state.running) {
/ u1 f9 m4 P+ Z( R - try {
0 u8 p0 O: l4 C# B9 S - k += (Date.now() - ti) / 1000 * 0.2;, q) a! C5 U: w5 D6 ]: B; d
- ti = Date.now();" y9 D8 o6 R& u" t8 B0 u# f+ a
- if (k > 1.5) {5 E3 J2 W8 H4 v+ l, a7 y
- k = 0;7 Y9 Y6 Y0 V2 h
- }4 e. E# h/ l, ~6 _3 H/ t8 g
- setComp(g, 1);% E' }/ N' Q0 b7 ^% a# C( R
- da(g);" i$ Y" {6 C* t; {, }" p2 ^
- let kk = smooth(1, k);//平滑切换透明度) g' H, n1 S7 R) K9 [- K k9 r4 S
- setComp(g, kk);
& h9 C; u( U5 j& y0 I - db(g);+ l5 H4 N! a8 w" U) _
- t.upload();3 H4 [! w, ?* P! r* x' c$ J" j
- ctx.setDebugInfo("rt" ,Date.now() - ti);
; |! @7 a2 |( k - ctx.setDebugInfo("k", k);
% z( l! |2 g; ]+ I h r - ctx.setDebugInfo("sm", kk);
9 L- f5 m; Y/ g, |8 S - rt = Date.now() - ti;
- _6 k' N, q, r. M. o1 t7 T - Thread.sleep(ck(rt - 1000 / fps));
" h9 l0 O2 C$ |! O( p - ctx.setDebugInfo("error", 0)
+ B+ q% E: a6 C) ~) U. I - } catch (e) {
+ l9 T! |# ~5 U3 X0 a% n - ctx.setDebugInfo("error", e);) W1 U7 o" R- a2 z+ l* G' B6 I1 |2 Y+ T
- }
& n5 ]# ?& f6 c) l3 ^ - }; [8 D- f- g% @! A# X# h
- print("Thread end:" + id);
- C* x: Z! g8 Q* {: ~, } - }8 J4 @( g0 {3 u8 y& n2 k
- let th = new Thread(run, "qiehuan"); M" d3 |* J; L1 P, C6 U
- th.start();
p ^) Q. `/ E2 e - }+ C5 Y& J$ O$ t5 L1 y( T
- g# F" d) L- K( m- function render(ctx, state, entity) {
0 J2 z+ E; u% P, ] - state.f.tick();
1 K9 y( X4 t7 ^( Z7 f - }
3 W3 a( ?: [& S k3 E+ T3 X! s - * l$ V, `& s8 a& c C. {# z+ H
- function dispose(ctx, state, entity) {
/ D5 i% b6 G' v2 l - print("Dispose");9 m2 k" h' L: R. Y0 J- n& f$ j
- state.running = false;. l ~: g! C( E
- state.f.close();& Y1 X, S- q/ W0 i9 S( Z
- }+ Y9 {* ]6 f# c9 a" @% U
+ B% m2 K2 C$ z& ]7 l+ z* B6 Z- function setComp(g, value) {1 K: _* o& y0 g9 j/ S, Z- }; t
- g.setComposite(AlphaComposite.SrcOver.derive(value));
4 I4 E% Z2 Q& N1 w. q( K - }
复制代码 5 ?) z9 x! G. e# 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。
9 z1 j" y7 I. ?' b. r) y' V Z
# L& u" T% X% g
& W. y L" Q9 P8 N9 l/ l顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)! ?1 q# j) L. O# P
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