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' R. ?! z6 I2 r4 w. ~" J+ n& ]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。 x5 m0 r$ v- c1 r+ [
- importPackage (java.lang);1 s4 M1 y G1 c6 A7 n; u$ C
- importPackage (java.awt);
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! \+ u" I: @& Q/ W- include(Resources.id("mtrsteamloco:library/code/face.js"));& c' @/ a3 o+ ^8 l1 C j: r8 K" @# {* f
% P2 b- l8 J2 |" B* j- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
) [5 A% [5 M/ z3 @7 j+ t/ A; X5 v - 9 I6 e& S: d) H+ I
- function getW(str, font) {- \! k8 p6 D9 f) z
- let frc = Resources.getFontRenderContext();# g" n" F6 Z$ B6 F6 l
- bounds = font.getStringBounds(str, frc);
~1 q% u# E% G, s: [$ }/ I! D - return Math.ceil(bounds.getWidth());
/ W" {4 y/ [5 \0 C. W( L - }1 Q9 h5 W- j% r7 f
. P$ w7 ^: P1 X! z7 j- da = (g) => {//底图绘制/ c- I$ r1 {. a* v3 @+ _& ]
- g.setColor(Color.BLACK);( t% f) u D2 u6 m4 n' O( B9 U
- g.fillRect(0, 0, 400, 400);' I3 M1 | ^; @# Z, X
- }+ h* \' A/ _" Y+ B
8 X5 W4 e; f2 i3 b; [- db = (g) => {//上层绘制
; b3 C3 R- E% i' @! { - g.setColor(Color.WHITE);
* K7 L/ v) \3 x! G - g.fillRect(0, 0, 400, 400);
9 q+ q8 \1 p- d( F, k* Y* U - g.setColor(Color.RED);
$ P) m9 U, ~ C; p" J% ?5 C - g.setFont(font0);
. M9 S" O. f; ^) b! w( x- ~! i - let str = "晴纱是男娘";
: G( w0 G% T2 h& }7 |- y# x - let ww = 400;
+ C5 p9 q* h: o - let w = getW(str, font0);
- j' f" {& z$ ~7 J - g.drawString(str, ww / 2 - w / 2, 200);
3 o5 S' r9 {. U7 D" j; y, O - }/ O C; L: ^, d3 b# _
3 a! A) E5 Q. Q# E, V# v6 y- const mat = new Matrices();
. u' A) v8 S% p# L- t8 _0 f% b' B1 o - mat.translate(0, 0.5, 0);1 {+ C+ x6 r1 d e, ~- B6 U k
0 t3 {$ e" n$ Q0 I- g% H+ b- function create(ctx, state, entity) {& R; \/ J# Q- M. x Z# ~3 f! n
- let info = {
* @9 v6 X+ V: w$ q - ctx: ctx,
4 q- S- }) G) Y' } - isTrain: false,
9 B0 [% ?5 h, i/ o3 D0 }# v! s/ g( a - matrices: [mat],5 ]0 G9 Y( H- T+ h+ Z9 W
- texture: [400, 400],4 K0 O0 i7 s3 q" n5 B0 Q+ Y A1 ^0 T
- model: {+ i; G* P- o1 j+ r; R
- renderType: "light",, j8 O* E* R. U& N2 S u5 R4 T
- size: [1, 1],
+ a0 e1 C( V7 c7 `1 y0 K2 ^2 b1 _ - uvSize: [1, 1]5 t l# ~% d: p* K
- }
- N7 A" X N7 ?3 A7 j4 m. E, M - }
3 D% K! \! q3 y- v4 _8 g" p - let f = new Face(info);$ s* d& b6 y. n+ r5 n- {
- state.f = f;1 k4 ?* e' Q3 l
- ) ~1 P( P6 O$ h$ g2 T) @. \
- let t = f.texture;# V% X0 _8 A" W* \
- let g = t.graphics;: [ [$ |* V: n( O3 U+ h
- state.running = true;$ ^& w1 k/ u l$ M
- let fps = 24;
, t3 n! }9 f7 n* K* K) ^) h - da(g);//绘制底图
/ L6 X" j j' Y2 P8 ~2 G - t.upload();
" f& Z4 _% _. O- V/ t - let k = 0;
6 W& U: [, \' _ - let ti = Date.now();
* u0 M; I$ _: X9 \+ K X - let rt = 0;, `. t' K) \" b! W7 [; E/ P
- smooth = (k, v) => {// 平滑变化! Y+ S. P' A6 C
- if (v > k) return k;
: Z! r* T* j: b6 l ^& K - if (k < 0) return 0;. y4 h& H- e: @0 w5 V
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;9 l' N% R3 J* q- L$ C. n" p4 t3 ?
- }
" z- n) r3 v3 m - run = () => {// 新线程
" |- r' F0 R9 _' b% G# B' [0 z - let id = Thread.currentThread().getId();, @' t1 I, ^7 J: ^8 u
- print("Thread start:" + id);
! v6 P; H+ [' T1 W, |% C+ l _9 ~" a - while (state.running) {& N- X! j0 X! t' d/ u
- try {* W$ |( ?2 |8 Q' j
- k += (Date.now() - ti) / 1000 * 0.2;
; B% s1 M9 M6 b! M6 S/ ^ - ti = Date.now();+ P/ E& L) T1 t
- if (k > 1.5) {9 Z+ m' E/ V% c5 J+ q2 `+ F
- k = 0;
1 f* ]+ j* k# [$ a* H1 s2 h - }- q0 N% O$ `8 f% Z
- setComp(g, 1);
/ h9 H+ y0 v" k3 }% ?( B - da(g);
5 X4 K7 v' b2 d( Y, M" V - let kk = smooth(1, k);//平滑切换透明度
/ a H, x$ w F) `) g8 Q - setComp(g, kk);
0 [( n J8 Z( c - db(g);
% o" Z J; w: h* s) v* I& w - t.upload();
/ \) n1 e2 Y( z" A p4 N - ctx.setDebugInfo("rt" ,Date.now() - ti);
8 J# R, q. l. |, _7 a& E2 W4 y - ctx.setDebugInfo("k", k);
/ Y/ H2 b0 \5 j - ctx.setDebugInfo("sm", kk);
1 o% v g2 ]6 a - rt = Date.now() - ti;+ R' H* \7 _0 i6 x. v' l. ^4 |
- Thread.sleep(ck(rt - 1000 / fps));9 i9 m4 o4 I% f0 M4 l' E
- ctx.setDebugInfo("error", 0)3 E+ p' [, g3 \) j0 s7 H, E
- } catch (e) {
1 X0 ~! y% q! {# } - ctx.setDebugInfo("error", e);
# `; w: V- H* G" U - }& [) G- ?3 W1 r) N
- }2 r2 i# M/ Y5 `5 K( x8 u& d& r
- print("Thread end:" + id);
1 P8 L$ h- Y% o" V2 W% t2 _8 k - }/ l8 P- X5 S1 m9 o3 `' N8 g
- let th = new Thread(run, "qiehuan");# O& t5 p+ h' W+ ~1 I
- th.start();
3 Q% c! F" g) x$ q - }
: F% F; H/ O, t7 y J
( r) O9 I1 L% D0 a1 V- function render(ctx, state, entity) {& g* h. X, i% l6 {8 D
- state.f.tick(); c( i) f( H- ]3 [) j
- }9 _# N8 e- `: ?) E) i
- 4 ?# I U5 K6 U: T! x. B7 `, V
- function dispose(ctx, state, entity) {
1 F* O9 M# U c; ?3 y - print("Dispose");
E! A+ `% a+ m$ @; Y - state.running = false;4 s% i# H9 Q( b( i, P6 |5 v
- state.f.close();
7 m) k* o f5 j7 g1 h& H0 O - }0 X+ J" F- D8 P1 @: n1 ^0 v
- 0 `" Z4 c4 |( s
- function setComp(g, value) {
* `, i7 |. _3 i6 r - g.setComposite(AlphaComposite.SrcOver.derive(value));2 _' J1 F3 b! G9 S
- }
复制代码 * R/ Q/ `6 J& _6 s
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。: ^ T# P! _$ I
" j2 z) W! ]' D2 G
) @$ ` z7 F) T顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)5 s0 h& Q! {9 _+ X: M; L
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