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; [8 n- z: X2 E* G4 A* j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。
/ w0 w* q! }/ ?1 w) M% a# k; l- importPackage (java.lang);! w1 G8 h# I q& E
- importPackage (java.awt);
7 N1 _: W' F2 U9 ]6 t - / H9 K, j+ i/ ]% T4 B% [$ K
- include(Resources.id("mtrsteamloco:library/code/face.js"));
/ c" a! }7 V6 g% z - 9 K0 J/ w# U/ }
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);; j7 m4 s# b% M: Q9 `0 e- U) M
- & B b' ?+ m# v
- function getW(str, font) {
1 Z" o/ p, j& j/ | - let frc = Resources.getFontRenderContext();7 ]0 J- d: F! j7 z
- bounds = font.getStringBounds(str, frc);. U0 r- W# N+ |( A' a' O* I
- return Math.ceil(bounds.getWidth());
4 E8 K4 u* n% Q - }' S/ f8 i1 ^6 Y8 g6 R
, @/ j. \9 b2 @3 q4 t2 z" I- da = (g) => {//底图绘制* E! \2 g# \; J: a: u% N/ z
- g.setColor(Color.BLACK);
/ M5 q$ [* I8 Z6 F/ K$ d& q - g.fillRect(0, 0, 400, 400);, z/ ?/ ?& |( q! p9 w+ d9 x, Z
- }
$ C( v# C% A1 Q- N% A
) v+ Z5 M" g5 q, u- db = (g) => {//上层绘制
0 r1 l" ` D0 c% | - g.setColor(Color.WHITE);
( g! H5 P" M) ?4 T- b - g.fillRect(0, 0, 400, 400);( `" |: v( ^( R$ B9 @
- g.setColor(Color.RED);
( F' n2 T. G: { - g.setFont(font0);
5 P+ _) Q* D$ i h - let str = "晴纱是男娘";* p, B6 A* ^, E* K2 v6 V# L2 D. ?, C
- let ww = 400;
5 e: h9 D* N' y. Q# f& _# h - let w = getW(str, font0);; W7 S6 t6 c7 f; Y9 _- N
- g.drawString(str, ww / 2 - w / 2, 200);) ^7 E$ d5 B; M& a+ s6 y
- }1 W; n, z, F! L' \
: V* \- @! J, z6 R/ j1 j- const mat = new Matrices();* C, ~3 ]4 C: _! W
- mat.translate(0, 0.5, 0);
% |* ?* V5 ]5 r! Q2 p& z - : F% \/ X: m: H6 _' v& C
- function create(ctx, state, entity) {3 o$ M+ s- {6 A9 D7 G H. x
- let info = {& }- G8 ~3 `) S- X3 _
- ctx: ctx,
1 ^: \+ ]. ^. p+ L+ D0 o4 `, _1 i( V - isTrain: false,
7 r1 [& F& y: R. `+ c6 d/ ? - matrices: [mat],
5 `7 T) f7 r9 X; c - texture: [400, 400],0 {2 \" u1 U* t
- model: {+ P) q) P$ e# y" H+ ], X; f
- renderType: "light",
9 b8 S# M, J6 }. A4 [ - size: [1, 1],
) y7 ]3 I' s/ [) v8 P9 F - uvSize: [1, 1]
' i* M' u3 Z) i* [0 d9 W8 t8 U9 m - }5 c& G6 O2 b6 g. v4 Y w7 C+ c
- }
+ D/ j1 O1 l" a% K - let f = new Face(info);! N# H% }4 N& ~
- state.f = f;- N# I2 p5 S- b- _" F
5 T8 u% r% r2 x: Q9 u- let t = f.texture;: X8 m% m# }: Z2 T7 \9 `. I0 W9 x
- let g = t.graphics;1 G9 z. a5 d( o0 G6 O" v1 _# ]# I% a
- state.running = true;- S7 Y; g6 R1 T$ N$ d5 X U
- let fps = 24;
: J( _+ E$ v& N- q# G' b - da(g);//绘制底图, S( u4 `: r' K; Y1 S* o
- t.upload();
/ x) y, i8 f" A9 _6 S* ~+ x - let k = 0;) @0 w5 G# V7 L1 K( I* f2 R
- let ti = Date.now();
( X' Q! e1 D7 ~( Q6 n - let rt = 0;* Q2 w" Z7 F$ |" e: N) N6 j
- smooth = (k, v) => {// 平滑变化) h5 \ O+ H7 ^3 f/ [/ n( M
- if (v > k) return k;
# }' A9 Z4 z6 ]; ?* X5 ^ - if (k < 0) return 0;- A; z+ z! I- ]3 A" h3 v0 j
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;4 i v% W& v* ^) L' B) A# j
- }
/ ~' O& Z5 h& G+ h - run = () => {// 新线程
. h0 x/ \+ u# Z/ E- s' p7 @ - let id = Thread.currentThread().getId();
( I* }6 q2 f& |( T - print("Thread start:" + id);
/ t' M9 a1 c r0 s+ G4 o! Q - while (state.running) {
) k" @: Q; P: k: F - try {4 G; k3 L) M% T, s4 n) n% m
- k += (Date.now() - ti) / 1000 * 0.2;- x2 m3 d/ ^& y2 ]$ x0 z7 S
- ti = Date.now();
/ V# M, j$ \' o! U# _4 W - if (k > 1.5) {3 o0 G( d; P4 I6 O/ p: j ]
- k = 0;8 v3 X2 @, F" J7 F1 E/ x+ n8 L
- }
+ I0 r) V! _8 O u - setComp(g, 1);# Y. M& n. F( @. C
- da(g);
& }0 u' d, A$ \, L% |. R - let kk = smooth(1, k);//平滑切换透明度
/ y) h- G; B/ [. Y. G+ i! g% }. e+ k - setComp(g, kk);
9 [5 z- E. ^8 f8 R - db(g);
7 }( h% o8 f; M8 y+ V - t.upload();( L" M- o4 M! m, I
- ctx.setDebugInfo("rt" ,Date.now() - ti);4 v/ v! s& R; ]/ l0 ?! v, ]
- ctx.setDebugInfo("k", k);
0 @0 S* h2 _+ T& t( r; h - ctx.setDebugInfo("sm", kk);* d+ ^+ |, ^6 @ F! U, R0 x
- rt = Date.now() - ti;
; @! N: e ^& n$ B - Thread.sleep(ck(rt - 1000 / fps));; O: T( Q/ C9 c! X# C
- ctx.setDebugInfo("error", 0)' n$ Y9 {- L3 S* c4 ]6 R; A2 ]
- } catch (e) {+ C l: `+ j# c* T6 Z
- ctx.setDebugInfo("error", e);
; f4 I8 ?3 p; |3 h+ `& j - }
% j; m6 w n+ q9 E - }$ N+ F" X( _+ l1 D3 d
- print("Thread end:" + id);
x" ^9 D% G; @ - }
( v9 m; a g) j - let th = new Thread(run, "qiehuan");
, }2 x. Y, T0 x" a' ` - th.start();) u! u) k) w" L' {- L% ~: L" X' ?$ P N5 o' e
- }
# w; B9 O! O/ S; ?4 r4 ?1 R5 v - - b+ P2 ]8 l. w x6 ]' \. |
- function render(ctx, state, entity) {2 a1 h- V8 y. y2 i$ j
- state.f.tick();
! w) S7 F5 E! P6 i# k; P( d4 y - }
( A8 k* {2 | D. {3 y
2 r3 }# \& y: B& C% M- function dispose(ctx, state, entity) {" e3 v8 F5 x& y6 c. t; c& u
- print("Dispose");
, T2 C! W8 F/ t& r! l) c - state.running = false;
/ \* b( `* x- S7 ~& K - state.f.close();
: x& r! V; V+ w7 z1 P - }
7 y, f$ T% G. _- Q, J2 s" Q6 b - : ^/ p, W& c, H. W B
- function setComp(g, value) {% D& R$ k! d. M* [# n
- g.setComposite(AlphaComposite.SrcOver.derive(value));
: I3 c+ H0 U( ~) a" A. b* j: H - }
复制代码 ; P6 l7 S" j7 O2 S |; V
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。* A# @3 z; t* |' \
1 b" f2 i; z7 h" E
8 s1 ?# `1 ]5 }/ o顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)5 N9 F3 n R- O. D( H7 I
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