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5 H6 n- D% R+ j+ A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。2 O3 U7 I* T1 A/ U6 U. t$ n
- importPackage (java.lang);
0 x5 _) J# t/ x M T - importPackage (java.awt);
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2 H; w6 C ^4 q5 Z- include(Resources.id("mtrsteamloco:library/code/face.js"));) {1 B- V% |" O; i
- . F; D2 O+ |( X" V% l% ~2 x: o' V5 X7 y5 x
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {. ?( y( |4 Z8 s2 F' o! R0 C2 h2 p4 y
- let frc = Resources.getFontRenderContext();
1 W# ?0 J1 [ e4 M/ i2 P& l - bounds = font.getStringBounds(str, frc);, ]" a$ s% o$ Z' n r; X
- return Math.ceil(bounds.getWidth());2 F* C2 W9 C- F
- }" R3 r1 R" M+ o4 Z3 v
- ' s, ?% |& m, d+ G& H
- da = (g) => {//底图绘制
* a. _6 y+ S8 `: m - g.setColor(Color.BLACK);) Z. L1 r! u. ^( O- [; ~
- g.fillRect(0, 0, 400, 400);
. a- |. e1 d# x* m( `8 ?9 \: k - }
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- db = (g) => {//上层绘制
+ ^- A' {8 y9 _) T z8 d3 i - g.setColor(Color.WHITE);* h, D( s$ ]6 R) a7 r
- g.fillRect(0, 0, 400, 400);/ {; h% B( A5 n, h; ~3 J$ a5 A
- g.setColor(Color.RED);( ~( \7 x% A/ R+ `4 p% ^
- g.setFont(font0);
2 j; Y8 R7 g) F, j; g o0 [ - let str = "晴纱是男娘";) n; q) v( `, r( e# e
- let ww = 400;. n) \& B! B" L
- let w = getW(str, font0);
# ]% L& f! s: z3 H, \& Q( H - g.drawString(str, ww / 2 - w / 2, 200);
% E3 T V9 n( m% s5 A8 l& \& F& e - }
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- const mat = new Matrices();7 f, G3 b8 n/ @! u( M
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
" N& ?/ Q. }% h; q8 K4 \. b - let info = {
. l8 z$ M9 H, q3 I: ?5 y - ctx: ctx,/ R0 ^( d5 ^, n( }6 l) S
- isTrain: false,( \( S& w7 P5 O+ ~2 h
- matrices: [mat],
) `6 Y: h ^- L$ h- O - texture: [400, 400],3 Y1 P7 P; D9 t6 U
- model: {8 ~% c9 P- J& @+ V0 C5 X6 y4 t
- renderType: "light"," v( J8 s0 m( Y
- size: [1, 1],
" f( R: z3 [ p7 F - uvSize: [1, 1]
- P! F6 q* v9 F' F$ ]2 T, k' I - }
& n. @# A Z# N7 K - }
0 o) [" t# K4 e - let f = new Face(info);
1 Z! u0 o1 n7 E: x1 U% o) H, h - state.f = f;, D, K5 U; C; p0 \3 l
- , z' }6 T3 y3 d; V, _
- let t = f.texture;
! x. }$ O' _/ t5 o! e# Z - let g = t.graphics;
8 V" U; G* [5 p# X$ ~- Q* \) c( ~ - state.running = true;( ^* ]/ K. j- c4 t7 p
- let fps = 24;
# o/ o; ]! C4 ^/ y$ N - da(g);//绘制底图
! f; K2 A$ G5 _! T# n - t.upload();
9 W7 J# J: S: Z - let k = 0;
4 M: f: u; V' }) k4 c - let ti = Date.now();0 g. z* l+ z$ C
- let rt = 0;
9 m U: y4 R& W- z5 O6 |# E3 T - smooth = (k, v) => {// 平滑变化
3 O- U0 X6 s$ Y9 x) O. K/ A - if (v > k) return k;
$ W. T+ d: J! l/ u6 {! Z - if (k < 0) return 0;. X8 F# _# o8 R
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程& ]! F( Q! o: W
- let id = Thread.currentThread().getId();8 ^( h G. b w6 I. F- o r5 C
- print("Thread start:" + id);
) Q; {# U: @# q3 p7 ^, F* T3 E - while (state.running) {/ [6 ^9 B5 s: R
- try {
! @9 o, { I; J8 o$ ~4 ^3 Z - k += (Date.now() - ti) / 1000 * 0.2; ? b& w m1 m
- ti = Date.now();
% H/ r. \" K/ a4 O" C4 [0 W7 c$ [/ e - if (k > 1.5) {( M' _- a0 U/ l4 [( K# n) ]; E
- k = 0;
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- setComp(g, 1);
3 v) s. x. {) p# @& C |7 A) X - da(g);
$ C A3 R9 v7 u( J- F, c' N - let kk = smooth(1, k);//平滑切换透明度2 Y3 B+ j! C, `
- setComp(g, kk);0 J! k# ~; m+ j, w9 t( Z( W! O
- db(g);
$ P6 L- x' w4 z - t.upload();% p3 C9 f; T/ j' V$ j& c. H% a
- ctx.setDebugInfo("rt" ,Date.now() - ti);
0 ^9 x' G* M' X! X - ctx.setDebugInfo("k", k);
; a+ E9 C- s7 v9 \8 b' S% E; K - ctx.setDebugInfo("sm", kk);+ Z$ h4 s' c& p' L; o/ P9 W
- rt = Date.now() - ti;( ]8 `: i' l1 ]3 U* U r1 \7 ? s
- Thread.sleep(ck(rt - 1000 / fps));9 Y4 J( Q' |% b
- ctx.setDebugInfo("error", 0)
- u2 v, d& j$ H- r# u0 f* f - } catch (e) {
* n# f' N+ Q" m( | - ctx.setDebugInfo("error", e);: ?% z1 n$ h, [- ]5 S
- }3 s* F2 L& P2 H# v) C2 O5 z4 i
- }
! ?4 p; ^# ~* L2 @ - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
* H( J. f! [" K6 H/ a - th.start();' D# H/ q3 p7 Q" e% w3 H" L
- }
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- function render(ctx, state, entity) {2 w4 k& v2 _) v$ G- w/ d9 q* P/ G
- state.f.tick();
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2 F7 _5 }7 \8 U7 m4 n, h$ b8 @' t- function dispose(ctx, state, entity) {0 F* |7 V& r8 ?1 Q6 L8 f
- print("Dispose");5 w! P1 r l% |# y
- state.running = false;
# I0 p! o. g& ^ - state.f.close();* ^5 m9 F3 }; q
- }" L" D. V! U! S2 ^2 m- V' C0 @
" s$ b& s! h% n3 S- function setComp(g, value) {' |! h3 j4 g5 a6 S% ]5 \6 e
- g.setComposite(AlphaComposite.SrcOver.derive(value));
0 D. N+ Z( O2 U! s, C - }
复制代码
: T1 w; @; f6 X% z: Y: \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)
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