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: X7 P9 i2 I; M$ H2 Q: v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。
. C; S1 s: i8 J$ h9 l9 |- importPackage (java.lang);
6 o4 Y6 V& ]* e: ? - importPackage (java.awt);+ M+ P0 C+ l1 U3 p! `
\6 c+ `) t( d- include(Resources.id("mtrsteamloco:library/code/face.js"));+ j) O ]6 e7 o; i
4 `: q- p2 @, e; r' I- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);: X# y( n4 A1 T8 H
- ' ~; {- V7 W/ p6 W1 {
- function getW(str, font) {
; m6 [+ e0 I: d( p; f L1 T - let frc = Resources.getFontRenderContext();+ @( [4 h; w' ^" X' B
- bounds = font.getStringBounds(str, frc);+ |9 p8 p+ K- ^0 G1 a3 o
- return Math.ceil(bounds.getWidth());+ O, O. A% ~& U" e% Q
- }9 [* v0 M4 c4 |/ ?
- & n% U) ~ W7 F0 t# n
- da = (g) => {//底图绘制
% m; c. z; P1 l1 _% ? - g.setColor(Color.BLACK);
4 Z- R' H/ l/ ], W3 q V) B - g.fillRect(0, 0, 400, 400);% E1 c/ \1 [! J2 k% `) S
- }5 X9 t3 l( j7 d+ g5 K; X) i
- . o4 {/ E* X2 t, F
- db = (g) => {//上层绘制
# l5 B2 ~. E t" t) Y - g.setColor(Color.WHITE);- T$ o7 R& W5 s5 I
- g.fillRect(0, 0, 400, 400);) n' K: z4 }1 h) W
- g.setColor(Color.RED);( U+ e+ ?) b* h2 a
- g.setFont(font0);, b( r$ g; v$ T5 ]: ~5 T7 g, p, L
- let str = "晴纱是男娘";
& Z$ _2 D# r! X6 \- o" I - let ww = 400;
+ A( o/ u7 u# y7 h/ m, d - let w = getW(str, font0);
2 Z0 S0 T& N7 b8 N6 F - g.drawString(str, ww / 2 - w / 2, 200);
3 ?# {, x! d$ D [3 y - }
, P/ \" f1 H! v2 t$ d* Q5 _
r1 x' D [: w3 f% z) j" G# r- const mat = new Matrices();, C0 \% E- o9 x3 d2 [
- mat.translate(0, 0.5, 0);
9 s' o' U- ]) e( I - b, W& K4 ~) U" D- w% d& h$ A
- function create(ctx, state, entity) {
0 b1 u! H+ p8 y$ J - let info = {
6 e2 @' `' G2 ?, c: h. E( B% x5 o - ctx: ctx,
- g$ [# ^' Q% p* y2 ~% q8 R - isTrain: false,$ i; C6 ^' T" d6 X' _
- matrices: [mat],6 {* K3 c* y. z6 n2 H. V* U
- texture: [400, 400],
, b- |: q! q) y* ?# A+ d9 U# q - model: {$ h+ J- o+ @4 W W% l. h
- renderType: "light",
2 P" [9 C5 F8 D0 J$ d - size: [1, 1],2 q9 D3 A. S& V5 i; r
- uvSize: [1, 1]+ O% l7 Q" E D0 [ `3 x+ q$ w! R
- }
/ ]9 ?$ T. ?7 [ - }2 l( r T4 ~2 A7 f
- let f = new Face(info);
) B U1 V% E+ l1 x) _ - state.f = f;5 a9 {& h% l* v& z+ h l% {
; w1 G9 C$ G3 K- let t = f.texture;4 x F1 T7 V" |: h1 O7 T3 b# z' D
- let g = t.graphics;
+ Q `+ @+ ^4 _ - state.running = true;
/ S# O7 S6 y' K R- c - let fps = 24;/ ]9 S( Y2 r# s3 t+ V# R
- da(g);//绘制底图. h* G0 \* T+ g3 @/ f
- t.upload();
/ V7 j6 `- w* V0 N3 ` - let k = 0;
( V% w1 y [: u) ~ - let ti = Date.now();
8 x7 g% A ^% l& D. C - let rt = 0;
, r, M- J5 U4 N* J$ M2 c; A - smooth = (k, v) => {// 平滑变化3 t- E3 j( w6 }* k0 q& W' F
- if (v > k) return k;
) s4 M8 c2 d1 J% S; Z9 S1 H' o - if (k < 0) return 0;
" H+ F' U4 o+ E6 n4 E - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;9 y$ `0 E- S, S- D3 D9 u
- }
5 d5 a( Q0 ~- t" ]- Z - run = () => {// 新线程
( E5 E9 S! s5 n+ S5 R - let id = Thread.currentThread().getId();0 `0 U8 B- N) {: }- B, L. L, X; r0 Z
- print("Thread start:" + id);
8 q8 O/ {- M+ K+ R# X8 i - while (state.running) {
|7 a7 _) C0 I/ o# `. l% I - try {
* l( i* x0 N3 Y& J' R9 J - k += (Date.now() - ti) / 1000 * 0.2;' N, _3 k" Z1 M; L2 p. [# Y3 X
- ti = Date.now();4 v! ]( t1 ^3 |; C7 R3 Q
- if (k > 1.5) {+ v+ P* @$ Z! O! n
- k = 0;
1 w! I( _! K% x X- Y. x - }7 X; V& k* b* J! K
- setComp(g, 1);, c; o' f0 E, l. b* Z# m0 H8 G
- da(g);
$ s7 s: _3 l8 v# z8 o/ C3 n* g - let kk = smooth(1, k);//平滑切换透明度
* C1 X# S d! a+ A - setComp(g, kk);( k/ m4 o: i7 E* T# r
- db(g);4 s# S5 x0 q* p* E6 ~
- t.upload();
5 u6 `" B! D! R3 W& i - ctx.setDebugInfo("rt" ,Date.now() - ti);
( l% x2 @* t) Q0 K% N$ I" q6 \4 H - ctx.setDebugInfo("k", k);! `0 a) V6 c6 Z0 n
- ctx.setDebugInfo("sm", kk);$ ?( a% c |2 W
- rt = Date.now() - ti;
) j4 r, V3 X$ U. j! @( S6 q - Thread.sleep(ck(rt - 1000 / fps));
U5 j' s2 r0 S; i6 z# j5 U - ctx.setDebugInfo("error", 0)
. C% Y2 i) Q# e9 X7 R: p# m$ r3 h - } catch (e) {& u* c/ |8 P1 k" L) f* V" K
- ctx.setDebugInfo("error", e);8 [" m+ q$ T1 N% @# e D" |$ |; @
- }( B% t) D3 ~& p+ J$ k6 T1 k
- }
. x- b( c! j4 x' i4 y/ k - print("Thread end:" + id);
4 F u3 O! i1 M7 `0 R1 B8 d { - }. n. x! u0 W6 @6 j" A
- let th = new Thread(run, "qiehuan");, n9 V! x* T) Z- [
- th.start();
# F- i- T- {2 I+ M - }
" L8 K4 M u' ?) \1 ^: S8 V/ }7 Z4 q - + V+ ~3 D b% M7 `. A/ E( j7 e
- function render(ctx, state, entity) {
5 x2 c% `# V# b7 P8 ^ - state.f.tick();5 {- m M4 Z0 [: ?1 ~2 S
- }% t: j" p* `- F
- 4 R' i: {9 K- O3 ]* s
- function dispose(ctx, state, entity) {
( r; r% V5 x! F) y3 E5 ]1 k& B# b( Z( t - print("Dispose");+ b$ o* p7 {/ p* f- z
- state.running = false;8 n2 V( D0 Z H8 _5 c
- state.f.close();& P+ f, R7 l) a( U; |) P F/ L/ `$ I# @
- }
( E1 m9 r, U5 n! L
( X+ `7 q- Y' x5 w2 m- function setComp(g, value) {$ M8 V1 I' D0 T& B: M2 T b
- g.setComposite(AlphaComposite.SrcOver.derive(value));4 t2 ]9 V& ]( |( \
- }
复制代码
$ s. W4 m" H0 {% j! D( c( i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。; F, a+ X8 J) R8 O2 s
- R; R2 ?7 {$ p) ^
* s2 C) M$ V, A1 X" J9 ]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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