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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 M0 B2 l* b) [
- importPackage (java.lang);
w. }, H/ J% U( `+ f8 U `, R$ G - importPackage (java.awt);3 }: Q, \) t8 [
- ' s& u' C/ x$ W- ]
- include(Resources.id("mtrsteamloco:library/code/face.js"));0 k& S9 N9 p+ C4 q; G
7 {3 {( v9 |, k- J# @- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);2 L7 f! Q+ ~9 J2 ^8 T
- # M' A' Y/ I" P) @3 s' B
- function getW(str, font) {
" @. i8 d! z: J) d# V. `0 J - let frc = Resources.getFontRenderContext();
& G' `. N! Y5 J# A0 F, L - bounds = font.getStringBounds(str, frc);
2 C+ o, v3 ?5 A( u8 E+ L8 e0 ?3 \ - return Math.ceil(bounds.getWidth());
' u$ Y! H8 N9 j/ r5 E5 n - }
% q# G6 c S8 H0 V+ G5 B - ' a% t c9 u7 V |+ v6 a5 J
- da = (g) => {//底图绘制4 H- e- J' K* E: X5 h7 u- X1 b! Z# L4 N
- g.setColor(Color.BLACK);% }8 p7 O3 L0 ]/ d/ `8 Q: b
- g.fillRect(0, 0, 400, 400);
+ B) S) O. T3 \, Q0 V2 E+ W - }0 b# `, q# j I
- 7 g7 f% J" P( u' B1 E5 k$ f7 S8 P
- db = (g) => {//上层绘制. t+ g& a5 A7 x# `% v* L% }# q
- g.setColor(Color.WHITE);& D* P1 D/ t+ p
- g.fillRect(0, 0, 400, 400);: n/ ]; O7 W; w" G$ q
- g.setColor(Color.RED);
7 t& J( F. t( v7 q# r: B - g.setFont(font0);
* [* r7 l Q& h% p - let str = "晴纱是男娘";
" _9 V2 _' U/ C7 ]0 S - let ww = 400;
1 Z. c- ?5 F9 k - let w = getW(str, font0);: k. p. H2 t9 F8 O4 s
- g.drawString(str, ww / 2 - w / 2, 200);9 r( U$ l. M0 M+ G# H/ F$ |7 J4 j7 O
- }
5 r$ G* j: R$ ?0 X5 A* G
' m1 B! p$ Z$ P" A, f8 H* b7 E- const mat = new Matrices();
+ E" ]1 o5 W6 ^8 p7 [ - mat.translate(0, 0.5, 0);6 p6 e: C9 f4 [
2 d- {* ^" m! u. x- function create(ctx, state, entity) {+ D! |$ i5 `* {; G
- let info = {# o5 v* ^9 [2 A( L+ Z1 [# C
- ctx: ctx,6 L/ [& G, X# [
- isTrain: false,$ y( i" t% j; k7 C0 N" P. m% F
- matrices: [mat],
* v6 X2 d" K. K' M( m" _ - texture: [400, 400],
7 E# @6 k+ ?" ^2 o. ]$ n - model: {
8 s! A. O: ]! X0 i) ~ - renderType: "light",$ C0 t0 m+ B) Y; f$ {
- size: [1, 1],
: g# r9 m0 K I- N9 F) N - uvSize: [1, 1]* Q3 J: _9 i- m! {
- }- N9 X0 S0 v4 {9 I0 y
- }& |$ b: E0 d! X' Y0 {! q
- let f = new Face(info);
* C H4 m1 F$ t+ ~' b - state.f = f;
: o; R9 ~4 m! j4 @: l. V
& w' o6 H; @) I! X* b. @- let t = f.texture;7 T& L6 c: V, H0 n. C5 O
- let g = t.graphics;0 M Q- d, k( H/ c0 P$ z A
- state.running = true;
" Y# r u# {% z6 c- t B - let fps = 24;% H9 ?# s4 G R; i" V
- da(g);//绘制底图
# \1 h7 \$ `" B8 s - t.upload();+ d; f- ]6 k5 s/ m+ z+ y
- let k = 0; v# j6 I- C. I4 r8 x( y
- let ti = Date.now();3 K0 W. c3 F* h I) m6 N' ~% O
- let rt = 0;
" D6 C2 u9 R; \ - smooth = (k, v) => {// 平滑变化& O3 p5 l' u/ e. m0 V
- if (v > k) return k;
6 k8 _2 I, s8 q# Y- f$ P - if (k < 0) return 0;
# o+ r# ], m+ N - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: a+ ^0 g2 o$ J" H/ x5 e. O% b
- }( E1 q A0 n c) l( Z
- run = () => {// 新线程% N( ]4 s8 G9 B: b
- let id = Thread.currentThread().getId();
, z$ a( o4 g' E$ x g( t - print("Thread start:" + id);, H" E% C" E( ^0 O5 T7 S0 n' y/ g2 T4 n
- while (state.running) {
4 y8 I' }- I( p% W* @$ N - try {6 n5 e9 N1 Y3 X, k, b2 T
- k += (Date.now() - ti) / 1000 * 0.2;
! q+ K" M, @' n - ti = Date.now();" T% [! W7 D6 h. O4 @& d Q
- if (k > 1.5) {/ f: g; h2 Z: Q
- k = 0;; }. F6 O2 R4 U; G9 H$ }: B
- }* ^0 p- ~# j5 [& L5 h+ L7 k
- setComp(g, 1);
( C1 C- `( D/ N: }7 A0 { - da(g);
& c1 q) m) X& e' d8 v - let kk = smooth(1, k);//平滑切换透明度
6 C+ S# P% W( @9 b8 u4 b; G - setComp(g, kk);
- r) a4 Z2 F8 y6 p, U6 J - db(g);
p `$ e% q5 P$ d - t.upload();
7 y. O7 ^' u2 o8 _/ i - ctx.setDebugInfo("rt" ,Date.now() - ti);
0 i; k) Q2 O/ b! D" d& _ - ctx.setDebugInfo("k", k);3 V9 R' ]* y- ~+ M2 B
- ctx.setDebugInfo("sm", kk);0 Y% n8 e% k/ H- D4 l7 k/ N9 f
- rt = Date.now() - ti;, ~/ G6 D; `% C$ w
- Thread.sleep(ck(rt - 1000 / fps));" E3 B6 R U$ z6 \0 w3 y G7 ?" A' M
- ctx.setDebugInfo("error", 0)
, Z' f4 \& F) g" ?' M- b - } catch (e) {
0 g: V$ n* c, K, | - ctx.setDebugInfo("error", e);
7 H4 e `$ X6 l) T# Q' Q - }9 b/ e& H1 X% B# J1 L: y
- }7 ]* s% [& n4 H% \
- print("Thread end:" + id);/ a7 k# M, U2 U( _' D# j
- }
. a1 K$ `9 m6 p# H+ L - let th = new Thread(run, "qiehuan");
# N7 Z9 e" B- v2 | - th.start();7 J9 }- G9 W+ V; ]8 i3 L$ \! ^$ b7 C$ t" K
- }
5 w/ Z+ |" _' J5 g - * K2 P2 }$ k9 J+ i& k0 h
- function render(ctx, state, entity) {
$ \; _/ F* T: u1 @) n2 x" O: o9 D" u - state.f.tick();4 N9 i7 M3 D4 l. l
- }
- s- X$ x7 B: M8 G* ? - ! j K# N0 G0 |( k+ n/ T8 u
- function dispose(ctx, state, entity) {
2 f+ p# s T+ j% Q1 s1 T- Y* h - print("Dispose");
* e5 {0 w# A5 I# X - state.running = false;
) ~3 {% d- K. e9 c! D: w ~; Q- B - state.f.close();
w* C: A" S3 H# P4 _# J - }
% d; e* e+ ^4 Q# k: Y) O
; \$ f f& C, C7 R. I- function setComp(g, value) {
& |0 x0 `* l' J* h+ T - g.setComposite(AlphaComposite.SrcOver.derive(value));$ D5 X n1 z+ r @9 O2 K" ]
- }
复制代码 : w4 e7 `0 w+ h, i7 k" F3 l' P
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。0 f; [9 y4 f1 c% x" @: Z
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9 Z# U& c/ t S1 N' K7 ]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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