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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。" U; s" z; `( f8 s/ w/ F* b
- importPackage (java.lang);- T% ?* m- V; \0 \$ g
- importPackage (java.awt);! S7 M& T9 F. ]1 k0 h9 t
- % V/ X2 s1 q' b: D& M- m
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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$ K7 o6 d/ D8 m- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
& z5 P: T1 l, S/ B
! t4 q2 Y% ]$ k- function getW(str, font) {
^" O3 B2 D1 y- c4 }. z - let frc = Resources.getFontRenderContext();
% b" [, L2 w' ]. `0 p) l* ? - bounds = font.getStringBounds(str, frc);6 S! }; Q/ D; j" W; g! q
- return Math.ceil(bounds.getWidth());
- A; R+ g/ b: t4 c - }
7 F7 [9 g0 u9 i9 A - # Y# Y9 s! W4 U5 v' M: w' v
- da = (g) => {//底图绘制
1 }: o; c9 h4 u4 j - g.setColor(Color.BLACK);
8 C" N* _9 @) i# m7 U0 Z; d - g.fillRect(0, 0, 400, 400);
7 A+ w* S) H, B3 }1 j) q! @( ]; q - }
+ [3 G$ R/ g0 ^5 G T - " ?9 r+ B# |. C' L- T4 e
- db = (g) => {//上层绘制
' K7 r) O7 S& L) X- `: T2 u - g.setColor(Color.WHITE);4 Q4 T. o7 P' z5 j
- g.fillRect(0, 0, 400, 400);. s. ]- j) C: [
- g.setColor(Color.RED);
! s# Z) c# G+ b* ?& s9 R2 D - g.setFont(font0);
1 B" n# H& P. q. M7 N; C r - let str = "晴纱是男娘";. `+ a" m; Q7 K, B
- let ww = 400;
' `; L, F0 [1 `7 t' r" }8 a - let w = getW(str, font0);3 m1 S ]7 c- E2 s1 }6 Y
- g.drawString(str, ww / 2 - w / 2, 200);& l) ^% f ?% R# h
- }$ O( M, N( c7 ]$ C
3 Y8 h8 V; I+ V2 z9 F E, ~- const mat = new Matrices();3 g. `4 G4 P) n! X0 d, N$ ]# f/ X5 k1 W9 _
- mat.translate(0, 0.5, 0);/ R( A4 D% K1 w
3 e( I3 {% I, F* s: X' x8 ]9 K0 _- function create(ctx, state, entity) {
6 V2 d/ ^; e* w9 V V8 M) \ - let info = {
$ C) ?* ?- A9 E0 h+ Z - ctx: ctx,
9 J" |9 K5 `* k- M - isTrain: false,
! ?0 F. I% e, l6 I - matrices: [mat],
5 K& n) a0 j, v: G; g - texture: [400, 400],
; ?: |: \) f! R Y" k; H - model: {
2 H* O$ [$ B! p: Z/ O& U8 b - renderType: "light",
" t; s- C# P/ _( ^0 a( G6 ^ - size: [1, 1],
* Q8 S( q x/ v$ g; N) ?2 \! L+ L0 | - uvSize: [1, 1]
8 y4 L/ e A* o4 R) G7 J( O - }
3 p, r. I, s# Y8 W# x1 I - }
3 L$ c8 N8 w) O; w3 t4 m; | - let f = new Face(info);
, L% c+ E. R7 ~9 M- E, N3 d9 \" r - state.f = f;
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$ C& Z; o) ^; B4 T5 G: M* A! D; `+ @- let t = f.texture;
1 j9 x% i( f8 U) K" ~ - let g = t.graphics;
2 j/ m+ v9 p" T; g( c$ l - state.running = true;
4 Z2 r; F, r5 |6 d" O$ I! t& q - let fps = 24;8 v! @) k" B# _: h- Z* p2 E
- da(g);//绘制底图
' I% _+ z! b4 T% u1 Y d8 ^2 b - t.upload();
& y! p4 }3 A; {3 W' C) `9 p+ T/ N - let k = 0;4 A8 }9 Q1 [- @( Q- p
- let ti = Date.now();
5 a$ l' j% y/ T( Q" k: U - let rt = 0;) I8 i. w3 T/ P6 H) T
- smooth = (k, v) => {// 平滑变化
. I1 F2 g- U7 c% ]$ I# A) k% H - if (v > k) return k;
0 n2 k" r) X! x7 a* _ - if (k < 0) return 0;& I. r* d' S# q# N9 ~9 T# {8 |
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
. j! A# @3 z7 B. [; p+ H - }8 c; J) I9 S2 B6 W& z
- run = () => {// 新线程7 g1 M- v+ W- \4 x% u0 i5 A- W. O
- let id = Thread.currentThread().getId();3 N: t- L% t, u. V8 {7 R% A
- print("Thread start:" + id);8 @2 |0 x2 {) X8 {& J
- while (state.running) {0 T& `9 O0 L8 {; q7 n
- try {
Z, q% p, u" B8 c+ I - k += (Date.now() - ti) / 1000 * 0.2;& ?( Y2 a4 m( h( |. i' P& H
- ti = Date.now();
& P7 x3 [/ a2 L1 N% H - if (k > 1.5) {+ ^2 [+ x, u! p. H2 F
- k = 0;# R* _; b) k& u
- }: I' Q _ M2 T/ o6 Z
- setComp(g, 1);* Y# } e6 a% i! J8 f, \" ]; }' U! V
- da(g);1 w! K ?: j a& V
- let kk = smooth(1, k);//平滑切换透明度. ~5 F$ k, F! u8 T+ D4 s
- setComp(g, kk);1 [% K T% x' A
- db(g);
3 D7 t: o% w) ^, c/ I - t.upload();
! B5 U+ ^+ m% ?- p2 B# z - ctx.setDebugInfo("rt" ,Date.now() - ti);
$ t7 @! x ?# k* M# \5 ~ - ctx.setDebugInfo("k", k);! f6 F5 @# p7 Y5 e4 [1 V
- ctx.setDebugInfo("sm", kk);" b$ v8 E) j" d
- rt = Date.now() - ti;
5 i& d& B$ F+ X( z - Thread.sleep(ck(rt - 1000 / fps));
0 U1 w/ V9 C* S5 Z% l - ctx.setDebugInfo("error", 0)" |# g4 o# t% {1 {8 x* l8 p
- } catch (e) {3 V, M! d6 u: t% J
- ctx.setDebugInfo("error", e);+ [# S5 n( R7 w# R0 f2 W
- }& [5 f- v- A7 ~8 c/ p
- }
; d" G5 u5 K$ Q, c4 f# c - print("Thread end:" + id);
: D$ j6 {" x' f( A9 F - }/ T! ^$ a1 p/ J7 k: v% L
- let th = new Thread(run, "qiehuan");
+ y7 z/ {: d$ g: Z V - th.start();
7 K: R9 @1 }4 h+ m5 K0 E. ~ - }1 X' J" k, S+ ^: p# u6 G
- # @2 m7 R0 \' G4 w
- function render(ctx, state, entity) {
' G M2 g; Q, {# W0 a8 \: N - state.f.tick();
# L1 z: f0 ~/ I9 `; ] s - }2 g( K" c0 C4 k
8 i/ G+ m/ x. P! `; [, A" `: K- function dispose(ctx, state, entity) {
* a1 L: F3 J, e r* {! |3 | - print("Dispose");/ n7 |! d0 m. s3 d
- state.running = false;5 w! p9 l9 G# [: j) [4 t6 v- |% F
- state.f.close();% j$ B+ y# ]! @) `6 l
- }; y( p8 x) c+ D! N) A
- 2 C6 M }& I3 J
- function setComp(g, value) {
! O/ Q( j+ D; T5 q9 }" d2 D4 f - g.setComposite(AlphaComposite.SrcOver.derive(value));4 G' B1 z0 s3 v1 n" d
- }
复制代码 , J- u5 [3 Q: N* d; X
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。
9 g3 s+ {+ l) H5 D1 U3 [* h. E% \3 s `4 _% Y& M$ j
4 o. ^6 B9 b! C1 O9 C顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)& N" `$ v/ X$ S) Q$ g, k# l
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