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9 M1 Y1 g4 B9 A8 R8 ^* ?: }: _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。( t1 v5 O5 }1 U& p# a
- importPackage (java.lang);0 {- p8 m4 P3 D8 ^1 c* R
- importPackage (java.awt);$ G1 u2 A4 o8 U) `! z
: Q. { p4 g" k9 {1 O/ N3 I8 z- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
' b. R3 X$ n. M9 M - let frc = Resources.getFontRenderContext();
- I& }" C0 Y# s y- o+ q - bounds = font.getStringBounds(str, frc);
$ J$ t" d4 n& A2 K3 q. c - return Math.ceil(bounds.getWidth());$ h H. o2 j9 S% x1 C
- }
; |$ _* x+ `4 F" u& ~9 C$ {
' a4 r2 k4 _- k; y# `- da = (g) => {//底图绘制/ @2 u. Z# a; r
- g.setColor(Color.BLACK);
5 z# [, X, K/ a - g.fillRect(0, 0, 400, 400);, Y! U* J4 t4 k7 \
- }; D0 Y* h7 h* x- ?0 N& C" B/ i9 O# q
0 n1 f/ }. Q" } g. |- db = (g) => {//上层绘制
( s0 q9 d0 Z F8 `/ C! @. n$ m - g.setColor(Color.WHITE);7 s' q) Z! q9 h4 ^+ g% R
- g.fillRect(0, 0, 400, 400);, V2 N: o5 J) z& U) g
- g.setColor(Color.RED);- ]$ c5 v% H# b
- g.setFont(font0);1 c2 ^- [+ u+ T4 R3 k' o! ]4 l
- let str = "晴纱是男娘";
1 q( A5 s+ a. Y8 E+ l8 H - let ww = 400;2 l% i$ O5 N+ e6 C. d, ~! l! H
- let w = getW(str, font0);, |: Y$ b4 @& t' F: W* F3 L4 r
- g.drawString(str, ww / 2 - w / 2, 200);7 w F( ]) [: E
- }; a6 L" _8 b/ c; P6 f; K
?' M2 b! |: I0 U* c4 u, ]3 I- const mat = new Matrices();
5 x) O: b% Y4 ^2 R0 u - mat.translate(0, 0.5, 0);9 D* P/ ~( `6 d6 v( F# J
i% V1 s/ v& x1 [- k, n, a4 H- function create(ctx, state, entity) {( {+ I# Z5 v$ f( {$ z
- let info = {
9 U, T8 {1 w0 C. s& ?4 w - ctx: ctx,
( _% w: r3 _$ i - isTrain: false,
p h7 d2 P% C9 S" n8 ~& | - matrices: [mat],' W% D( R r: _8 H5 E- p) m
- texture: [400, 400]," f) i& R8 J/ d( ~- B) x: y- y
- model: {
$ B% L$ n$ L% s5 J - renderType: "light",
8 G' R$ _, N8 L% v3 w. p - size: [1, 1],& K4 U% ^+ W6 I. M. [5 V& @
- uvSize: [1, 1]
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- }5 D9 x7 d4 Z3 {2 k7 N
- let f = new Face(info);$ i" w2 N; p$ D4 g1 V- d+ L
- state.f = f;
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- let t = f.texture;) R' X8 K+ F* {- ^$ y
- let g = t.graphics;, p1 |& A8 P) g/ d4 o U
- state.running = true;
, M8 {7 S! O1 g" g: Z - let fps = 24;
0 Z0 d- t) T: `- I- z% L - da(g);//绘制底图
1 V; U; c; ~2 V) J - t.upload();
1 b1 {3 s1 ^ W8 V0 L4 v - let k = 0;- m6 |4 u; J. I! \7 x
- let ti = Date.now();
' h( S: o0 U9 |+ W. r/ \ T+ r* o - let rt = 0;
/ \6 ]3 y. v4 x/ ~5 n - smooth = (k, v) => {// 平滑变化! z: H6 `1 {3 s; v) K5 V5 K
- if (v > k) return k;
1 r: v B' \0 x - if (k < 0) return 0;
& p' c) \7 K: @: O - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;* h4 j m1 g: m% G- V3 ?( N5 V0 q
- }
8 c1 C& N) y( ?: U8 ?. i - run = () => {// 新线程
: [- D7 Y/ ~+ c - let id = Thread.currentThread().getId();
& D. x& w1 L3 g$ Y/ J# }) D7 k& ? - print("Thread start:" + id);- h' @6 U: j& b( L4 t# k% A
- while (state.running) {7 i6 T' B. y0 x& `* v+ X# V
- try {9 r/ N1 |# T" F0 ^2 h( C' x
- k += (Date.now() - ti) / 1000 * 0.2;6 g9 p L, r- l/ ]$ w
- ti = Date.now();) E; G" c$ B5 v$ J3 q C
- if (k > 1.5) {7 l" J( _7 \7 n. g2 }
- k = 0;
( j* {+ ~8 |; ?# X& y! W/ B - }
0 h' T# n) n& }5 _ - setComp(g, 1);5 h* i7 _/ G3 s) ~. m q& i
- da(g); Y; }" k( D' [. B9 P
- let kk = smooth(1, k);//平滑切换透明度) c* a3 `. G, _0 M) p2 z
- setComp(g, kk);
1 X" f2 L$ R' {" ]8 z - db(g);
" Y7 T! i7 Q+ E& n2 T6 J - t.upload();$ u# i; |- Z% t8 b
- ctx.setDebugInfo("rt" ,Date.now() - ti);
2 M+ {% \ o. {0 Q - ctx.setDebugInfo("k", k);
* g0 V) i9 d% Q3 y2 F# u$ t( D- B+ s+ d; ]: S - ctx.setDebugInfo("sm", kk);
) J- Z8 F0 e( Y' B5 Q6 Q - rt = Date.now() - ti;
" x, | j; |2 H6 ~) c$ B - Thread.sleep(ck(rt - 1000 / fps));1 D% ~- S% b$ U, s# V! E; `0 M* I
- ctx.setDebugInfo("error", 0): _4 D- |6 N# d) r1 L/ l
- } catch (e) {2 }0 [- q- o( N. F
- ctx.setDebugInfo("error", e);
8 d& _" }9 m" m - }
- @) v9 j) C2 T0 p" @ - }( R+ A- g/ X! F/ S3 R2 |' {
- print("Thread end:" + id);! R0 R: f: e5 r+ T2 ]) j
- }4 w' u; k% ]0 k2 K- { p0 F4 c
- let th = new Thread(run, "qiehuan");+ k" k# X# I( I: b- [
- th.start();
5 P* R1 x) T8 N - }
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& `/ [8 }* m% r+ [2 T, A- function render(ctx, state, entity) {: e- T6 x( x$ C
- state.f.tick();
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( T, u% `: m9 ~$ T$ x1 V- function dispose(ctx, state, entity) {
7 Z$ I9 P2 M, `5 |+ u: ?" ` - print("Dispose");
% x& G2 n) g, }1 O% ^ - state.running = false;* z; O! p/ }3 m) `$ H* O- }5 Z
- state.f.close();' `( P/ K5 M, C9 U
- }; O2 u" r4 S, _2 S# ]/ {- }
* V0 [! O8 k% R2 c' |4 X. g2 X5 ?! j- function setComp(g, value) {: x) e+ y. o `" e+ V* H+ l6 D
- g.setComposite(AlphaComposite.SrcOver.derive(value));
3 X, J( J1 d2 _* m& C+ `& U. U; x - }
复制代码 / f+ K$ t1 J" U1 Z& @
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。' Y* N, @: `6 G a2 e
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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)4 x7 W6 K/ W4 M0 X$ j, M
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