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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+ O0 j1 p- m
- importPackage (java.lang);! G8 F' v7 y3 ?% _ X @: p7 @
- importPackage (java.awt);- k) H6 ^! R5 f. e9 d1 ?. o
- : v& ~4 ^3 _* I. f
- include(Resources.id("mtrsteamloco:library/code/face.js"));; W% m: e, x6 g6 ]$ R
0 [8 s2 ~9 e# P# x- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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* H4 K+ a3 Z0 q5 q- function getW(str, font) {
) F; u$ V8 y9 S T1 O/ [# P+ o - let frc = Resources.getFontRenderContext();! Z6 ]" O( V3 O4 g
- bounds = font.getStringBounds(str, frc);8 D7 v4 @( i/ s* T2 d4 o
- return Math.ceil(bounds.getWidth());
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, P$ `. d# p& k6 H- da = (g) => {//底图绘制
) ?/ i, n; g+ ]# h$ s2 P) Q - g.setColor(Color.BLACK);4 A0 k) m3 L) ?4 T, i0 }9 L
- g.fillRect(0, 0, 400, 400);
7 C+ O8 A6 ?; q3 l E D - }
) g; t9 B0 C2 l - $ Z# h% @; h0 F+ k9 `' [- j% R: G
- db = (g) => {//上层绘制
* D! G8 r1 Y; d1 w2 {& O- x' D - g.setColor(Color.WHITE);9 ^7 @6 R/ Y) b% i3 [
- g.fillRect(0, 0, 400, 400);; E6 g# ~ u, ^) x' ~9 l! X2 w
- g.setColor(Color.RED);/ j$ o/ V8 d, Z5 ], i1 o0 X& p
- g.setFont(font0);
6 I3 N, v2 H; w - let str = "晴纱是男娘";! D5 V* \- h# A3 {' \" R9 w
- let ww = 400;8 R' v- ~7 J0 y2 c( o* x
- let w = getW(str, font0); z) p. v6 a _7 K! F" D
- g.drawString(str, ww / 2 - w / 2, 200);
, a; i$ u6 _2 G+ C/ V! z - }
; ?3 S6 k+ ]: s' G. H9 k$ w F - ! O6 I7 f/ p5 ?, t) `
- const mat = new Matrices();
& A( P% e$ r9 M/ P# ~9 |7 |- _ - mat.translate(0, 0.5, 0);
# [- z2 X. J; d" q+ L2 x - ) W7 T7 I6 v; e; z* F {
- function create(ctx, state, entity) {
' l7 P3 Z! C U8 D- F% B - let info = {
% o7 }4 f( ] H* {, M4 F/ z! s - ctx: ctx,, q& w: X* G9 r( p% s& w& L
- isTrain: false,/ L4 L0 n# w- g: G2 L9 \
- matrices: [mat],
$ ^8 V4 D4 J4 e8 Q$ K# L - texture: [400, 400],* z: p, H# r: k
- model: {
0 O, u% w9 Y- S* E7 U* U; Q - renderType: "light",
* E5 B/ j1 h7 V+ f+ W8 `4 v - size: [1, 1],
$ }% s8 [& K3 a - uvSize: [1, 1]% I4 Y/ ]/ H9 ]+ l& d8 ?
- }
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- let f = new Face(info);
; @+ b$ t6 C3 g9 I0 W0 `; `1 E) s2 y - state.f = f;; z5 a. i2 |1 ?
- $ ?0 L) i4 y3 x: H: }
- let t = f.texture;6 I2 ]& E& a( ~$ ?2 {% j
- let g = t.graphics;8 t; t$ j: |8 n2 ]( A
- state.running = true;1 q8 H8 T1 f8 f o& @
- let fps = 24;2 f8 G& W& S9 F2 ?
- da(g);//绘制底图
, I8 P) _) e5 s9 j- i - t.upload();: G0 v, @& ]* m& Z
- let k = 0;
: @6 r/ z! s6 P& _" k1 j) Q - let ti = Date.now();
( p% U9 ]7 o1 i- R, p5 v - let rt = 0;
& W1 `) t9 ~$ B' `, {3 w2 b - smooth = (k, v) => {// 平滑变化8 }9 J# m- Y3 U# J I* x: b8 P
- if (v > k) return k;
+ e3 E3 y* D# u4 b& F; K. C' O$ } - if (k < 0) return 0;9 n. H7 {% h) T& u
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
- V* }( F% y7 |6 K; C8 A - let id = Thread.currentThread().getId();, S" ?4 N* s. i6 R1 W& ^
- print("Thread start:" + id);% y3 U- S, q7 G; l4 z3 ^3 Q
- while (state.running) {7 X, H T P6 ^2 k, }9 h+ S3 N
- try {1 _( e: }5 s% L
- k += (Date.now() - ti) / 1000 * 0.2;
% T' Y0 R$ t9 z - ti = Date.now();
; f6 Z$ q; b# r# K. Q - if (k > 1.5) {
" ~' b' s/ W' r! Z+ m - k = 0;
2 }3 Q. D2 A" I - }
/ g* [% S4 _8 y7 ^ - setComp(g, 1);) G b; ^. T' f9 N
- da(g);
& M, o1 d% n, s, j. @) n& }6 A. u - let kk = smooth(1, k);//平滑切换透明度; @; ^ P" g! x( Z+ r5 M
- setComp(g, kk);
6 ]5 c) }' W+ D# i8 o# L - db(g);( e# y* L6 X/ L4 g# P) i
- t.upload();; i- Z/ r% C0 g7 U4 p# N! o$ Q% o% c
- ctx.setDebugInfo("rt" ,Date.now() - ti);
+ g( M% d- r# {; M1 K - ctx.setDebugInfo("k", k);
% D z' |% @8 U+ W" T2 M& b - ctx.setDebugInfo("sm", kk);, w1 t. G1 @* H- r. j: ~
- rt = Date.now() - ti;2 D; w) q9 i, F8 h' [: a
- Thread.sleep(ck(rt - 1000 / fps));1 H9 F8 v" O* n2 \/ ~
- ctx.setDebugInfo("error", 0)
+ w/ o, _" j2 Y( w' U3 W2 E1 C9 d - } catch (e) {
9 A! A7 X+ U/ H2 _3 w3 d$ F% H+ o2 ^: k" B - ctx.setDebugInfo("error", e);; n9 ^% z4 A8 x" |. U) n Z
- }0 _: J5 p, b# z* d
- }
+ A' Y2 U$ j4 E7 K - print("Thread end:" + id);
: l6 N) s9 Y7 r2 I; H) n; w - }# q" I" a) }; a+ h
- let th = new Thread(run, "qiehuan");! D9 _1 k$ K; j/ f, ]/ J
- th.start();
, A# Z. `: G0 Z8 o$ K8 Q0 z - }
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9 { X$ l7 E3 }' X0 S0 J* n( a/ M- function render(ctx, state, entity) {
% O+ Q+ |1 `$ z( h+ W - state.f.tick();
( N# r$ y, }& h- O1 m - }
! @ m5 J+ {5 Z/ ^ - " P v! g7 x" s; X
- function dispose(ctx, state, entity) {
: o+ p0 X7 Y- Y0 E; n. n3 R - print("Dispose");
1 H5 P* F4 V; \# ^ - state.running = false;
0 u! I* B# g. r# X6 H - state.f.close();
$ y+ r; A0 R2 p m* [9 Y: Y5 t - }
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8 q- q1 D0 _' b: s, }$ _- function setComp(g, value) {/ [* @" y. I( ? n
- g.setComposite(AlphaComposite.SrcOver.derive(value));, c+ K% H- D5 v/ W1 {! v
- }
复制代码
5 k. j7 l' z3 `8 l9 C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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