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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。0 H% f5 h# H( a8 @6 Y* q! v: U; d
- importPackage (java.lang);5 i$ J2 ]+ i, I- o% H4 a
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));, r0 m/ f: R* @
. N+ S) G) G6 G7 W8 b' T0 S- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 I, `; ^, k, r2 I& d: H
$ S8 V, m3 p1 N' Z. i9 D5 e& A- function getW(str, font) {
# J, I9 w9 H. A& G6 q- I+ N - let frc = Resources.getFontRenderContext();5 T( S/ O( Q$ v$ D
- bounds = font.getStringBounds(str, frc);2 D: Y* I7 u$ t. V) Z
- return Math.ceil(bounds.getWidth());7 T: y1 h/ { W; O! N; i9 V$ K6 v
- }
+ E3 w' Q i! H; @! q- M. J - # }! j4 `6 s6 K: @. E5 \# Q" X( c
- da = (g) => {//底图绘制
( b5 G0 U- M8 D. _8 q# U3 X* X, d1 ? - g.setColor(Color.BLACK);
# V4 X- r; C1 ^$ l& Z. j - g.fillRect(0, 0, 400, 400);
8 G" o% l- z+ W6 i7 ` - }
7 F. M: v1 R/ v& u4 d1 ` - ! F; I& L T* K+ @# F
- db = (g) => {//上层绘制
4 `/ Q) g+ g+ G( {: @# @ - g.setColor(Color.WHITE);- J, t8 D$ H. T. n+ |+ c. a. c/ H
- g.fillRect(0, 0, 400, 400);
2 e' [: |* N, ]' H- ?- [* ^8 N - g.setColor(Color.RED);- l* M; Z; u% K/ T; l: p! d
- g.setFont(font0);! {3 H5 Q0 P8 j% h( s3 Q
- let str = "晴纱是男娘";- t; c8 g \8 q3 U0 p4 |
- let ww = 400;% @: M* Q7 r6 O0 N; a
- let w = getW(str, font0);
7 H* {" C% a7 a2 U" c - g.drawString(str, ww / 2 - w / 2, 200);" H4 M) i+ g3 ^7 ~4 \; q
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- const mat = new Matrices();: b4 s$ } Q- V9 r: {# ]/ e
- mat.translate(0, 0.5, 0);- z# i) k6 n3 H: D- M( s0 r, u& |
- $ s2 p- Y/ w0 q0 M. [. y" [
- function create(ctx, state, entity) {- Q; E. j, u- w2 c
- let info = {
, Y& \: W5 R8 Y, e7 I' D& S. f - ctx: ctx,7 }/ i% w! @" L2 M. v
- isTrain: false,5 j7 E. Z* Z K. @) _
- matrices: [mat],
; O' {5 h1 a; S9 \$ J2 g - texture: [400, 400],# z9 T7 P5 |8 y9 ^
- model: {
4 \. a0 k9 J/ G& Y - renderType: "light",
3 X' T) l" h! T0 g - size: [1, 1],
. A @+ m2 }3 ?+ \, [ - uvSize: [1, 1]8 q V5 P9 y$ z+ j
- }4 D) Y# v5 X; p! f. x( f( G/ i
- }/ D0 E- v5 @! t) m5 L
- let f = new Face(info);
8 ~" b0 C, E+ V; g' A - state.f = f;
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- let t = f.texture;& s* x6 R4 X* x
- let g = t.graphics;6 Z/ x' m6 d) u. G: z
- state.running = true;4 B L7 A' h# {! }; w
- let fps = 24;4 M, x4 J1 M3 h0 R' i: j4 r
- da(g);//绘制底图
% q- Y, e2 Q" S- x4 ` d9 L" T3 D) U - t.upload();! K4 B) E1 W. ^4 O
- let k = 0;, G. F: p( `5 B
- let ti = Date.now();
4 j, y# R" h4 i* W- y) y, D - let rt = 0;. L* J0 m9 H# E0 ?* a4 o; F+ B
- smooth = (k, v) => {// 平滑变化) w) w. B0 ]0 d0 a$ h& F
- if (v > k) return k;
! }# q# P! `" Q/ \2 q - if (k < 0) return 0;
) K% b/ z3 N* i; v - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;# x. M, P" s8 g- g `, J
- }
5 E+ o. G% C! r _" C - run = () => {// 新线程
3 B F z! j/ d* R: t8 T. x - let id = Thread.currentThread().getId();
" w( V9 u( o: ^' Z1 i% D" V( m t6 [ - print("Thread start:" + id);
# t' }( y, s* i u: q& } - while (state.running) {
+ v" C$ l1 P- P( G, K$ q - try {( i1 Z" Q: K! m9 B
- k += (Date.now() - ti) / 1000 * 0.2;. C) h4 y$ C) m+ @3 g' o& x, [
- ti = Date.now();! X' Z0 ~0 u# G' M6 p1 _% ^0 P
- if (k > 1.5) {
2 c/ m7 A5 X, Q) b) I6 o* E+ Z* E - k = 0;9 v1 B. Y; V" {
- }; p0 b! \/ [4 @5 t5 [* K
- setComp(g, 1);9 m2 N) p8 Y9 F6 K4 B
- da(g);+ h# @; }& `& b7 b* H
- let kk = smooth(1, k);//平滑切换透明度- A# C* q, \1 w! v3 A
- setComp(g, kk);
: ?; H2 x! m5 I! A1 H - db(g);% s2 I7 j5 K9 b! l
- t.upload();3 l6 v) h/ r$ B
- ctx.setDebugInfo("rt" ,Date.now() - ti);; R: ]4 X T; K, Z3 Q; m
- ctx.setDebugInfo("k", k);3 Z3 t" N* S! ^3 O* v
- ctx.setDebugInfo("sm", kk);
& s5 ?+ l6 o& W4 N& H - rt = Date.now() - ti;# [% k& ~( \) k. }+ \
- Thread.sleep(ck(rt - 1000 / fps));9 b t9 z7 z" p- Y& _
- ctx.setDebugInfo("error", 0); Z7 k8 A9 f0 A+ M5 D5 c* [ j
- } catch (e) {
6 t* k+ p- ~# ^! s1 M0 \ - ctx.setDebugInfo("error", e);
0 Q2 G' |6 w D( A - }
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- print("Thread end:" + id);
8 D7 Q1 t1 q( M7 M( Z( b - }
. e" \" I3 B, `( W - let th = new Thread(run, "qiehuan");
9 d5 ?9 r" V, s5 S/ H6 j9 { - th.start();
9 y- i! p5 K2 ?2 A' W$ u - }
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- function render(ctx, state, entity) {
* G w6 t+ e" r( f# x; S) K* @ - state.f.tick();
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" d4 f& e) M& q. I' {% }- l- h$ B- function dispose(ctx, state, entity) {
2 K- v+ i4 |( G! k- w - print("Dispose");
3 }. s6 V3 ^4 U8 n o1 s - state.running = false;
6 T, |3 F) R. Y - state.f.close();
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" A) k8 G4 j& j% G' {- function setComp(g, value) {1 Q5 g; t' ]+ G9 V
- g.setComposite(AlphaComposite.SrcOver.derive(value));+ l9 n/ M( d5 ~) f/ ?2 k9 ^% ^
- }
复制代码
d3 h7 ?& g0 }) {8 b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。
, l# E; ?. \6 c! E* Y" U2 `/ q$ m. q( M2 J# L v
| g5 {; |/ M* m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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