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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。, J8 n/ Q- Z* L. {
- importPackage (java.lang);/ Z& E R( \* B
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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3 G! X9 Q ?: }, p$ K- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);) l/ N. m2 [4 i0 ?! a. m8 h
- + S' i' B' a/ U# ^4 B# t: M
- function getW(str, font) {
3 z4 W& m3 R7 y6 F* F. [7 p - let frc = Resources.getFontRenderContext();. Z# E1 D' I7 e$ ^# P
- bounds = font.getStringBounds(str, frc);
5 w5 p, Y% [6 c0 g - return Math.ceil(bounds.getWidth());
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$ W" W: k' a, m0 E- da = (g) => {//底图绘制
5 |* l0 x1 a a. f - g.setColor(Color.BLACK);
' E+ @# x% r; P, M - g.fillRect(0, 0, 400, 400);! P, u7 P$ F9 N. N( F4 h3 s: y
- }+ ?. }9 @! ]. E( c0 X2 G% e
" q# {7 \: o" c' O3 v! S! n! D- db = (g) => {//上层绘制6 M$ z+ K5 k. y ^- m' i7 ]
- g.setColor(Color.WHITE);6 t- q/ v: A6 f' c0 G1 x
- g.fillRect(0, 0, 400, 400);
7 x( w6 z+ S9 v9 y0 Q- W - g.setColor(Color.RED);6 a% e8 z x3 M
- g.setFont(font0);
/ k9 J1 F U+ B - let str = "晴纱是男娘";
8 L3 M; S& A+ B7 j5 m - let ww = 400;' g* E! p; |/ }1 H# \6 ?/ s
- let w = getW(str, font0);6 K# k, f% G- x3 j3 a* ~' z
- g.drawString(str, ww / 2 - w / 2, 200);
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- : |2 D- \" ]! Q- ]1 v
- const mat = new Matrices();# `3 J0 X, { ^9 |+ H
- mat.translate(0, 0.5, 0);# B0 @. n; C) |
- ' _! I Z5 T" v( {
- function create(ctx, state, entity) {
! X, f6 s& t, k# U4 W3 [ - let info = {! A$ e( m- J I" V. f( V" x3 N
- ctx: ctx,
+ i" a' W+ x0 ~: M5 W& }# ? - isTrain: false,+ j% x6 N' p& x3 t
- matrices: [mat],
1 O) {4 e8 N5 x/ J: X1 ~ - texture: [400, 400],( i( d& z* v& Q4 L
- model: {
1 Y; @& P3 c" y& G, D - renderType: "light",
, Q" m2 i6 \ F. H - size: [1, 1],( Y+ `9 ]7 \5 q* E+ @/ M4 V( M
- uvSize: [1, 1]( E' g& e# Z# a% w
- }+ K2 k; P, n. H6 j
- }
. C, l R. j7 ?2 f d - let f = new Face(info);. h: ^7 ?7 H. G1 t9 t7 P
- state.f = f;
, A+ v4 r+ X9 g w/ n
7 @5 T7 ]( `& ]6 O. z2 u( Z6 [1 }; j5 ?7 e- let t = f.texture;
0 X8 i4 @+ n6 x% K1 j }$ V# c - let g = t.graphics;3 W' u ~( a) I
- state.running = true;2 P6 b% K6 I3 @ W
- let fps = 24;* T8 _: @9 p; q0 E ?
- da(g);//绘制底图2 t' C. ?, M5 o3 l0 D
- t.upload();8 H1 V0 S: v# J' ~
- let k = 0;
/ O. T$ v8 }5 z0 Q/ Z - let ti = Date.now();
! n) r" ^2 r' w3 S" Q& {/ Q' d - let rt = 0;
0 h C- j$ U: _& B) | - smooth = (k, v) => {// 平滑变化
4 o; ?7 m, G2 v - if (v > k) return k;
' W8 @% K0 h7 X - if (k < 0) return 0;
9 E; ?, Q7 q& F9 X- v - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
8 { s3 {0 S8 C( u - }. U- k: a8 P# m) u
- run = () => {// 新线程9 t0 n) f5 n& [
- let id = Thread.currentThread().getId();9 U- a( S4 Y. E: \
- print("Thread start:" + id);
- h4 `8 A) ~6 \: P s/ [- j - while (state.running) {9 J- d, V4 q" @( d# V. l% h
- try {
: T( W3 [. x; j/ f - k += (Date.now() - ti) / 1000 * 0.2;9 [) V0 _4 ~" y( i( r
- ti = Date.now();3 m$ h/ ? a$ {6 r7 p
- if (k > 1.5) {
) G* }4 H( Q1 M - k = 0;
, ] O5 y2 {# b# T; K - }
: s$ A4 Q: x% x3 q' W( o& o' k - setComp(g, 1);+ L, k( h4 b [# P, Z/ a
- da(g);
" G( Q/ e2 R; z9 R - let kk = smooth(1, k);//平滑切换透明度
+ [0 G4 Q: D O. ^) [7 [ - setComp(g, kk);) w& J. d9 D) c" I( y# Q/ d3 L# o
- db(g);
! T( c8 h' v. t( o2 @ - t.upload();0 w4 W$ Y! m1 k- e! ]
- ctx.setDebugInfo("rt" ,Date.now() - ti);
2 `4 f# E! M4 B/ Y - ctx.setDebugInfo("k", k);
; V" j% B* B5 j2 H - ctx.setDebugInfo("sm", kk);
2 ]: @- ]" b( F - rt = Date.now() - ti;" D7 ~1 T) g. A" m6 S n& c- U" X0 P' Q
- Thread.sleep(ck(rt - 1000 / fps));
3 H% W' U, D; _' _) H4 ~5 S6 R - ctx.setDebugInfo("error", 0)) d' D! h9 ]6 r0 z) w9 `" M
- } catch (e) {
' w( Y S& b& w/ d) M - ctx.setDebugInfo("error", e);
+ o/ P7 M. g# v3 f - }
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- print("Thread end:" + id);% \* f/ b: P7 z
- }7 b1 V }7 P0 @2 F+ }& V0 S4 Q% X# T
- let th = new Thread(run, "qiehuan");0 H" x# a% v) B: j5 s
- th.start();
( u0 d* S# H' N1 O - }
6 [7 I6 t$ ]3 E! P- U5 m& p0 u- _
" g# a j: S A$ @7 I1 E- function render(ctx, state, entity) {$ I- a1 ~- A, e5 _
- state.f.tick();
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- 3 g/ O$ ]% v5 o
- function dispose(ctx, state, entity) {
, U8 E' |) q6 D( g/ g- ~& I2 ` - print("Dispose");
! J' X- P t9 t- b5 V9 @. @7 S2 D" I1 | - state.running = false;
( v' O+ k/ k( p( z2 ?5 w - state.f.close();6 o+ N* |# n% \+ a7 T* z( p
- }
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4 Z8 r3 Y) Z! l9 }- function setComp(g, value) {
3 W. s0 D: L. \6 n7 J9 l: p1 n, P# d - g.setComposite(AlphaComposite.SrcOver.derive(value));; Z s* G5 w: Z/ { P: \6 }
- }
复制代码
% f- n$ s; b) i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)5 Q- l4 e b" M1 _/ y
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