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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。
/ H. V) ^& a( Q- importPackage (java.lang);
- n9 l+ U% {8 m' \ - importPackage (java.awt);" n$ l- o! |: ?2 B4 m; x
- . a9 X3 Y) H8 E2 J- t- J# T
- include(Resources.id("mtrsteamloco:library/code/face.js"));+ U1 @9 @/ w$ t. g
- ! @4 ^, b8 V, O; k/ {
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
: ~% m- ]( G6 o' l) S9 ^4 w
. G2 ]9 L/ f: t4 v0 l- function getW(str, font) {
- b8 |4 r1 e0 e' l+ R - let frc = Resources.getFontRenderContext(); S s7 Y4 o+ E/ S
- bounds = font.getStringBounds(str, frc);/ C7 }' s$ |+ i4 `& l4 ]% P, ~
- return Math.ceil(bounds.getWidth());9 x* Y& q2 x$ k% V) B
- }
2 k" z1 u7 j7 n& ^4 f0 ] - # `8 `0 q; ]( r
- da = (g) => {//底图绘制8 i- ?0 c: P5 N3 [# O
- g.setColor(Color.BLACK);
' `! i' g$ k0 f! `( Y/ D - g.fillRect(0, 0, 400, 400);
% `* _$ V7 K! B* _8 _ - }! f6 X; z. a* q+ h% k
+ W: Z; Q7 a4 A: e/ ]- db = (g) => {//上层绘制! e% f* a c4 O
- g.setColor(Color.WHITE);
% c y8 }; c0 V, C - g.fillRect(0, 0, 400, 400);' ~# H2 w& ?7 h9 u
- g.setColor(Color.RED);
" n$ E# [+ R* U( m! F/ M! S - g.setFont(font0);2 U9 o9 k3 }$ V6 r7 L. s4 q
- let str = "晴纱是男娘";8 D: \4 R; u8 w) o. U' R
- let ww = 400;/ W. }2 v# w% Z1 F! e% e3 b
- let w = getW(str, font0);
% ?! U- s# f; j - g.drawString(str, ww / 2 - w / 2, 200);
$ ^" M a2 ^% u/ N% r% H6 j - }
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+ {% Z9 M& Y0 c9 Z( e& M$ A- const mat = new Matrices();% |& n# N" `. a% |
- mat.translate(0, 0.5, 0);
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0 ^. W+ {9 y- L7 x- w' J4 w1 @- function create(ctx, state, entity) {
1 Y& d2 w$ q( g9 V9 @ - let info = {
$ \8 H, d% \& n) j6 P. D - ctx: ctx,
) T/ M) F8 M2 Y% l6 m" ~8 c - isTrain: false,0 H3 V' N8 Y( e. k2 N0 [
- matrices: [mat],% B0 [/ z) j% u
- texture: [400, 400],, O& Y% X, U) _
- model: { ^: ]! B* V' t4 m2 S" k+ X$ L
- renderType: "light",
" ]' C9 c3 ~6 `; B; I - size: [1, 1],
* j$ o2 g* B% T2 M: ` - uvSize: [1, 1]
: ~# }5 w5 y# b* l9 H1 ^ - }
3 \3 P9 N, J6 P& k - }
5 D% q; q6 }6 k8 I - let f = new Face(info);
+ Q% l0 b# z$ A& C D6 t - state.f = f;' d! b( }6 w. K# X
- ( M1 `1 @ t9 ~9 ^4 d" `: O
- let t = f.texture;( g. ? q% |, r
- let g = t.graphics;
' I& T R3 S3 J; T9 A - state.running = true;/ }2 e7 Q* @0 O- k
- let fps = 24;. T7 m5 ?8 E- }; y
- da(g);//绘制底图
5 y" Q% [/ f% W2 y1 R) z - t.upload();
9 ?: r6 N5 X8 E+ I6 z - let k = 0;% R$ c2 G' o9 v/ Z/ p Q; U+ B
- let ti = Date.now();
' C: {: e% D1 i L( E - let rt = 0;
! w2 I, B q) v7 R; H; M - smooth = (k, v) => {// 平滑变化0 D W- u Z, [6 h1 x9 m/ c
- if (v > k) return k;, G8 ~8 ^; B5 G9 U* ]) r7 n
- if (k < 0) return 0;9 U& e, w* T+ |4 K
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
8 [$ R- g- h7 T' W8 c - }; e8 M& b5 y7 c: L
- run = () => {// 新线程
9 s+ }1 Y# W. P: o# k# u4 E- o8 J - let id = Thread.currentThread().getId();
- w0 E2 ]' w/ x9 h - print("Thread start:" + id);6 [. j, {9 W9 Q3 s+ P7 I& T" E
- while (state.running) {! @2 { k! K, A! A2 S
- try { `) Q1 J4 e- H; U
- k += (Date.now() - ti) / 1000 * 0.2;1 K- v; g$ ]0 K/ ~; ^2 Z
- ti = Date.now();
! ]2 l' k& I( H% |/ H; r - if (k > 1.5) {7 R. T. _$ P8 T0 _" M0 `- F. d
- k = 0;0 f6 d7 Q2 L8 E% ?
- }. W$ v& R U7 r2 r* h& ], }
- setComp(g, 1);9 b, o0 d& g4 m, N
- da(g);; i6 R5 Q5 D* ^# i8 l& e5 x/ t
- let kk = smooth(1, k);//平滑切换透明度
) h; ]9 q" o$ [3 W5 V. R- V5 W - setComp(g, kk);
8 e( O) H7 ]* `; Z' H4 j8 T& e - db(g);! p! A o+ M, d
- t.upload();
+ |! B% s" q3 i$ ], I3 l% D. ? - ctx.setDebugInfo("rt" ,Date.now() - ti);
/ s/ M0 ~4 U6 O! g8 c w/ u" f - ctx.setDebugInfo("k", k);
5 A4 T* z; W' B$ {! P - ctx.setDebugInfo("sm", kk);
+ o- N1 W* y. z" y# J - rt = Date.now() - ti;% G }, M7 I$ f& e0 D/ T9 l
- Thread.sleep(ck(rt - 1000 / fps));
8 n3 C, `% k% n, r+ \: @( A - ctx.setDebugInfo("error", 0)+ |! G% P; o9 V; G; ?4 \
- } catch (e) {" {1 O* u1 @" v* ?: ^% z& ^0 `) x: [
- ctx.setDebugInfo("error", e);
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- }
' A$ O) Y5 m6 v - print("Thread end:" + id);
$ ~0 i, A' l" [6 \* z# G - }
. X | D" i8 n6 N! d- u - let th = new Thread(run, "qiehuan");& f: I1 o% I: h7 o2 A
- th.start();
& E; j* S' A3 h5 X" [4 ^( y - }
+ c! R8 t% i; `6 [" @8 S% ^& u# S4 i
0 C9 N8 t: M; \- \- function render(ctx, state, entity) {
5 d* H6 \0 d4 V' Q, [9 C9 Q - state.f.tick();
; n1 k+ B2 _- P7 Q+ r4 y - }) U1 \: y! ^+ G u' I
- 9 X3 r7 v! G6 \, L: ?' g; g! ]
- function dispose(ctx, state, entity) {
7 p: V& P1 W# k( a - print("Dispose");( e3 l" J9 \( ], K$ h1 k$ R# N
- state.running = false;
2 G9 |3 n( J, w' {/ z - state.f.close();* e1 q) S/ ?+ f& k, v
- }
+ p' d6 S6 F* C1 U& n# ]
% l1 S2 z9 T; q6 R' u- function setComp(g, value) {
& F" N R6 k/ U( I: x - g.setComposite(AlphaComposite.SrcOver.derive(value));
5 |1 d0 c. H' {6 } - }
复制代码
* F" c7 H: m* a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。
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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)! ~, t9 T/ `9 j2 x
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