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; S, q* J$ a9 r" f6 H H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。
6 L( ^/ D3 Z' K$ ^0 c- I3 F" I- importPackage (java.lang);
( T3 {+ Y) U) S/ t6 S - importPackage (java.awt);; a& D0 y# H7 D1 G* }4 N
" F1 t3 A. v# s8 j" g z- include(Resources.id("mtrsteamloco:library/code/face.js"));. ^$ O) v I- k" `" X/ d
- 7 Z- S0 B; z3 {9 c7 @( y5 n
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
F e$ B9 _( T# E6 D' }
/ ?8 v7 F( z4 }4 C, O- function getW(str, font) {
& G. a x$ \ b. f5 @& S - let frc = Resources.getFontRenderContext();" F" p0 n( ]' _: V. D6 Z: g
- bounds = font.getStringBounds(str, frc);- M% ?0 b I! j8 E$ x
- return Math.ceil(bounds.getWidth());
: A+ E1 |: s0 j: {5 g - }
$ r. Z# {: `. Z* R+ ~' u' x
& { d& d/ N: z! u% @5 r6 C- da = (g) => {//底图绘制
5 f* o1 }, T5 }* m8 @/ B/ w - g.setColor(Color.BLACK);
( P9 ^5 E, @# F) k - g.fillRect(0, 0, 400, 400);: h8 i2 ]8 c/ _6 @. [
- }; g& b8 E4 _4 r V& U9 l
- R' Y8 k! q% g9 g$ c- db = (g) => {//上层绘制8 a6 \3 o$ d9 K/ I1 W
- g.setColor(Color.WHITE);
" i1 F- v% G- N& p) c# Y - g.fillRect(0, 0, 400, 400);$ }3 u/ f W4 _4 r. L l: j6 m
- g.setColor(Color.RED);$ M8 x: E( O2 @% ]5 b4 @
- g.setFont(font0);- H+ @! g" ^0 T1 q& G- c. p
- let str = "晴纱是男娘";4 F/ S7 B, i" H8 E q- M
- let ww = 400;, s9 s% _0 B6 I9 N& Z. B
- let w = getW(str, font0);3 [2 A# B6 |/ I) l1 ], _6 }
- g.drawString(str, ww / 2 - w / 2, 200);
$ \% ~4 X% Y, |% k ^$ e1 c - }7 b! I# R3 f ~! t$ V2 @- ]
; ?) T6 J0 z. p1 W- Z* ^6 n- const mat = new Matrices();8 v( }3 {% Y' J
- mat.translate(0, 0.5, 0);
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2 l/ M2 G. s2 `- function create(ctx, state, entity) {
4 z4 y$ }/ J H! i% S& t' [ - let info = {( Y# j2 z' F5 s# N( p
- ctx: ctx,4 |8 U4 [7 f8 b* Q7 |* w; y
- isTrain: false,
5 p- _! K0 d; K. S2 u7 b! D0 y! J - matrices: [mat],
: a) T6 w: G2 G: z J - texture: [400, 400],8 [ M0 j g8 S; I3 v9 B
- model: {
Q1 A9 r" O" k7 [, v% Z - renderType: "light",
5 c! o+ H- t* m0 }# f - size: [1, 1],
& M# k" b9 z8 E$ r: k! p( `+ X - uvSize: [1, 1]
8 q; Y# [+ K$ k* R - }0 I7 c% m2 D. Y% g. K4 ^9 C v
- }; [( o4 Y! }- ^, y/ C$ @
- let f = new Face(info);
1 E% m; ?$ X2 y - state.f = f;1 G/ p' I1 e/ a, c f( c
- 6 A- x$ E1 }% \- e. J% }
- let t = f.texture;
. n* ~6 V( I9 b; ?8 C q$ Y K" D% y - let g = t.graphics;$ e/ r `" P! {2 P! o
- state.running = true;
. r0 Z: ?" v# ~0 E+ F - let fps = 24;
" |0 b/ y. B, I9 W2 n - da(g);//绘制底图
9 c+ O3 U6 {( a! e/ h( U1 r. x# V - t.upload();/ Z3 L: c' a2 C& p9 H" u2 L& W
- let k = 0;
( A' k9 M( t( \* `/ l) r9 e3 S - let ti = Date.now();
; X+ ?7 k/ j! i - let rt = 0;
" G3 J9 Q3 M8 J6 v! z9 ]7 h# c - smooth = (k, v) => {// 平滑变化3 s7 `5 P( @% i
- if (v > k) return k;$ z% B8 y6 U" P4 ]0 R+ h$ L
- if (k < 0) return 0;
3 [' \8 ^ i: w$ B7 ?. B; } - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: k7 @5 N( `2 K1 O
- }
/ @( j2 f/ V* y; F F" M - run = () => {// 新线程
$ \. B( E* I4 ^9 |6 N - let id = Thread.currentThread().getId();
) J" d) Q4 Z9 r3 S9 y9 R - print("Thread start:" + id);8 J2 N2 i" |% Q. ^* R7 k
- while (state.running) {
V4 \. K. E+ K" C [2 t - try {
+ K; ?3 ^/ j }4 t( }8 Y' o& L - k += (Date.now() - ti) / 1000 * 0.2;% ?2 P) ^- j" ] `2 v8 q" {
- ti = Date.now();5 ]' m' R4 m4 e2 G0 B! o5 ~+ Z8 P) D
- if (k > 1.5) {
& z# ^1 \; p, v( g; ]% x$ | - k = 0;; s% D7 E" Y U. H% b% s3 l" x
- }
& R. p# r/ ^7 [6 H/ `4 Z - setComp(g, 1);9 ^# s) D& n( \( a1 A& d1 c/ d
- da(g);
9 v% }8 R2 e5 r( [9 \ - let kk = smooth(1, k);//平滑切换透明度$ ?* l) W! V2 C* t( g0 S" B) L) S
- setComp(g, kk);
2 w, E3 ]4 D2 Y. ~- d' S3 |: W - db(g);" ?" A- V1 ?5 H: W9 o4 R
- t.upload();
/ y1 _3 z, C3 [8 T - ctx.setDebugInfo("rt" ,Date.now() - ti);
0 v) R3 p2 s6 N8 K) M - ctx.setDebugInfo("k", k);0 [0 {8 d3 [3 B% }# z$ U1 K
- ctx.setDebugInfo("sm", kk);
# p7 a0 v$ |7 {# I - rt = Date.now() - ti;
& ~1 f( E. w U+ Q- N( Y' d - Thread.sleep(ck(rt - 1000 / fps));
; z' @% |" N5 w: ? - ctx.setDebugInfo("error", 0)
" M8 ]% Q- S/ [2 Z# i! l - } catch (e) {3 A+ Y5 L7 `) D6 k. ?8 t
- ctx.setDebugInfo("error", e);
* r2 f8 g( j2 U! I) F9 r% j0 v/ X - }- J) ^3 V: k d
- }1 N1 h+ |' ]( `6 o0 o. j% O
- print("Thread end:" + id);5 @3 r/ r$ n3 m; r+ [" v
- }
# h1 g( p, X+ _' r - let th = new Thread(run, "qiehuan"); {6 k y: `) F1 q& c# X
- th.start();
& W5 ]5 _4 g5 Q" ]6 ?( F - }
8 Q* f, Q3 u# ~: B5 E( V4 C - ) P4 L3 I4 ?: {& u1 V5 W: {
- function render(ctx, state, entity) {; m1 w1 \5 r. Y& q. _
- state.f.tick();
2 o" c/ z' J2 ?& g - }
! r( u+ Q9 x, _
$ s6 S& X. d$ n: w( W; l7 f9 R- function dispose(ctx, state, entity) {
- ~1 p3 U1 `5 O J& y - print("Dispose");8 l7 X/ Z) W6 d) t& @, ?
- state.running = false;
' a" n |) Q" |. _' v/ d - state.f.close();
$ R0 `, I# |: W, `% h - }
A$ n1 R2 T& p5 V9 t
" E% v/ O5 I' q# r( V- l- function setComp(g, value) {* a9 _, |# Q: R( G W" y
- g.setComposite(AlphaComposite.SrcOver.derive(value));
9 ~9 ^" q4 S! G6 |6 v" y" z; ^ - }
复制代码
+ x Q+ z# ~ 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。: T- {# X. @) G- ^" q3 k; a
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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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