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+ y7 o+ b, n7 N& z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。
0 J/ n) A6 M! C) o- importPackage (java.lang);( S7 h* B6 z. j2 l6 o4 ]/ i
- importPackage (java.awt);7 t: q" V+ ^" K$ W! p, O$ o g7 v- l
- 0 r# z2 c. b) D( t/ }7 Y" k* }$ \' n
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);! F, j9 Q( h. O8 n: [5 v: k
- - M# b' C- F* n9 {) {
- function getW(str, font) {$ B* Q, I! D& u3 _- W. O( W9 x
- let frc = Resources.getFontRenderContext();
+ I y* M0 ~- I- v% C - bounds = font.getStringBounds(str, frc);
! a ~& L" G; e( b. ]) w; N+ b( A7 l - return Math.ceil(bounds.getWidth());
: e6 q U, ~, E* f. A; \; | - }
7 Q, A9 \$ o+ C9 [3 |; E ]7 s - $ \/ `/ X& h2 v0 R( }5 R
- da = (g) => {//底图绘制0 I1 d g# l7 f1 J
- g.setColor(Color.BLACK);
' n3 M. c8 B: w7 e, @ - g.fillRect(0, 0, 400, 400); e- j% A( F! R) p; s9 F' s
- }1 Q3 s7 d4 a) B. ^. ^3 k {
~6 F* ]1 U" ~% Z- db = (g) => {//上层绘制
' b9 s, F1 A+ s: } - g.setColor(Color.WHITE);8 ^* |4 J x$ N" @6 e/ r: a8 h0 E
- g.fillRect(0, 0, 400, 400);
* z, h: z7 y/ c - g.setColor(Color.RED);+ b0 O- a+ |) q m
- g.setFont(font0);# o% ^5 |" j+ a: h
- let str = "晴纱是男娘";4 A* j% z) z6 P+ K* h; l: E0 B" Q
- let ww = 400;
: @; ~2 p7 B- y- v - let w = getW(str, font0);& r; e4 Z" H) f& g
- g.drawString(str, ww / 2 - w / 2, 200);, Z) v h0 p2 W9 E# ^' n
- }
# \7 C- _. i+ N6 e
3 x# q! b. G3 ^: f$ ~5 H ~- I- const mat = new Matrices();
/ G* `; B/ W. C- E$ }1 z0 [ - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) { I# O3 U5 O. `, O0 X% \" Y2 g
- let info = {
4 p: y. o. K& s( N- G$ a - ctx: ctx,; q7 V1 _& `2 N ^" h8 A$ s+ e
- isTrain: false,) f: k. F# ]; p8 u" S+ t
- matrices: [mat],
; I( q% B5 l5 Y- b% z4 t$ L4 ] - texture: [400, 400],1 ?' `9 L4 f- v4 }
- model: {4 W" N9 u& q0 Y% V) W: w
- renderType: "light",. p' U8 o2 O& d6 H- m6 @( _
- size: [1, 1],
" U" u) M8 |0 X4 p4 `+ }8 y - uvSize: [1, 1]- m: P$ }: A. H D# Y) ?, l. }
- }
* X; [) E# f; X9 |" Q5 A - }
# C6 j4 }5 f# L- ]4 ^0 o3 b5 u - let f = new Face(info);
+ ~. X+ M3 K0 g5 c/ G3 e) y - state.f = f;
' G3 c: F; L, T9 o8 a* z
( r0 @9 }6 P1 e+ S& X* G$ \: S- let t = f.texture;
' h9 N z9 g D4 M - let g = t.graphics;9 h/ e- ?9 ]; w) J$ ~
- state.running = true;
9 F; o; w+ O! Y% h - let fps = 24;) m8 L0 c* ?' B6 H7 c2 y0 |6 J
- da(g);//绘制底图8 A6 }& B8 q/ Q9 I/ ^0 P
- t.upload();
& D% e5 Z- o9 }2 X6 M+ g3 x - let k = 0;# `9 @+ t; Q' `
- let ti = Date.now();
4 E% @1 U* k& K* _; {! u3 v - let rt = 0;) A. d; m7 w( l' ?+ u5 |
- smooth = (k, v) => {// 平滑变化. ^$ ?7 E7 z$ k1 Q3 ~
- if (v > k) return k;
+ c- h- ?8 l- u - if (k < 0) return 0;' Y/ L+ B- }/ Z' Y1 x5 K6 C0 P
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
+ D! e( x1 F( x- s - }
6 _0 K2 b1 [: I' P7 [ - run = () => {// 新线程
$ y6 ]. d6 @+ G - let id = Thread.currentThread().getId();
3 |( V$ n$ f: h - print("Thread start:" + id);
. K7 x3 n1 A5 y7 R7 I) V$ y' K - while (state.running) {
" a0 D. g! j2 f- I - try {# V* U* W/ x8 b
- k += (Date.now() - ti) / 1000 * 0.2;, r+ j- T: p) m
- ti = Date.now();
/ e$ Q6 I! N& O: R. i - if (k > 1.5) {$ C! |6 f# }. Q
- k = 0;( E3 x* C) E a: F; ~
- }2 I# {/ E1 j* n% I! c! b
- setComp(g, 1);
$ z, h5 d4 i5 u* U5 L - da(g);/ Q, K* ^4 ~; \+ @# F9 _9 ?) H
- let kk = smooth(1, k);//平滑切换透明度$ |( X" X( N# @4 ^! I
- setComp(g, kk);1 V% F r! N! d$ _
- db(g);8 D- w5 u/ N3 H
- t.upload();
, k; \3 t+ B0 n; n( ? - ctx.setDebugInfo("rt" ,Date.now() - ti);
5 ^5 J7 ~3 b1 s* g - ctx.setDebugInfo("k", k);
3 s4 M8 d* D) F! L - ctx.setDebugInfo("sm", kk);: D, ^% p. X# J* h
- rt = Date.now() - ti;$ z) b! ^$ |2 d& _ w
- Thread.sleep(ck(rt - 1000 / fps));) ]5 s* ^: c$ k7 g" ]
- ctx.setDebugInfo("error", 0)2 P* x" N3 O8 J* U- ~* ^( t
- } catch (e) {
% }9 u* [* X# R5 p - ctx.setDebugInfo("error", e);
( G' F; k- p( b/ V8 r; Z$ D8 U9 [; U1 Y - }
! d8 @+ I6 d5 f1 W' [; _ - }0 i* E: Y: T! k( t; f% C
- print("Thread end:" + id); c8 O2 k+ J$ {
- }+ ]4 K* k; E/ D2 W) G! {2 R
- let th = new Thread(run, "qiehuan");
% d4 @' ~4 _5 f4 U - th.start();
& D! v2 H0 w, g' t# m4 V8 \ - }
" M- h9 N O. _+ T" k; ^
; B) C. z& H) u5 \ N0 n- function render(ctx, state, entity) {
' G; X1 O! r! A; A, k8 _ - state.f.tick();# n& M- s8 o+ L; e
- }- I6 K4 g) E3 H0 d3 @9 k7 _0 r- d
: y! s' g* }3 j- function dispose(ctx, state, entity) {7 L# \4 x2 ]8 E, Q
- print("Dispose");
; }8 Y/ }: ^0 [2 v$ c e5 C' S G0 F - state.running = false;
3 d8 c5 @+ _, _9 M' y1 w7 n - state.f.close();' E, I3 q$ u- C" c2 n! c6 v
- }& C+ r! x" |1 T ]' Y5 K; g( }
- 9 E' a# ?. _* ^) |
- function setComp(g, value) {
! m0 @; k$ \; B4 m - g.setComposite(AlphaComposite.SrcOver.derive(value));
5 F N$ z8 _4 }" p D - }
复制代码 7 g" @# U9 @5 S8 ~
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。+ l, k6 l! ]& {1 j' I) `
5 j) w8 x& ]& i1 V
, d1 G9 _# v- F8 v( k" \& }: l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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