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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 b% u- ?1 m; V8 X3 B
- importPackage (java.lang);
5 C, y5 x, }/ t5 e- A - importPackage (java.awt);
4 d. H: b6 I0 I% o' H$ } - 5 e. P1 l1 q: x3 f
- include(Resources.id("mtrsteamloco:library/code/face.js"));/ b* n) W! S, M. l1 ~% V2 _$ ~7 _
. r+ g9 V' D M; x8 |4 f, K! L- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);3 A' r, F, s6 z! X3 K" x
- 7 j( h7 K, F1 l1 y
- function getW(str, font) {1 G }. q* l2 H% |. [' q! W
- let frc = Resources.getFontRenderContext();. ^) a7 n3 m" x! {5 ]- P* f
- bounds = font.getStringBounds(str, frc);
- Y4 [. }* s; Y# ]" v9 ]! h - return Math.ceil(bounds.getWidth());- ]- y4 S2 k `, D' z
- }" j; g/ J8 h# p' z% O5 l8 s- V
5 ~, ?7 H! j4 Q5 L5 O- da = (g) => {//底图绘制- V }; s* J& x
- g.setColor(Color.BLACK);2 g$ p( E) M( j2 L ]" `# q4 w
- g.fillRect(0, 0, 400, 400);) U5 g C4 | ]
- }
3 @& S2 U1 ^& k* ^4 J6 Z9 F - $ Y# F" }3 u$ L7 a! p' | J1 v
- db = (g) => {//上层绘制
- P1 p* L4 W+ r$ |9 O# O0 l+ e - g.setColor(Color.WHITE);
% H7 D H9 ~- g8 } - g.fillRect(0, 0, 400, 400);, {1 w$ ^# V6 S/ W, V% ~
- g.setColor(Color.RED);
6 ?. t4 b" R. U5 i s - g.setFont(font0);1 C, t* j; c# Y9 V) S2 [
- let str = "晴纱是男娘";* o" Z# p6 D7 o2 C
- let ww = 400;
( p: L5 e$ m" U* }. j - let w = getW(str, font0);0 E$ R, n: c! \* u
- g.drawString(str, ww / 2 - w / 2, 200);2 {- a& j" _% ~. K# Q( x8 ?6 h
- }! a, [* L0 K& T% b. T+ x/ c
7 W+ S# g" v) R/ Y( Q! i( {- const mat = new Matrices();& X; N, d4 I, @6 z( a( j" f
- mat.translate(0, 0.5, 0);0 O* L: ?7 V, H3 ]8 m
: i4 B, x6 _" z+ ~- function create(ctx, state, entity) {0 |: x# W2 G, Y9 v8 Z" M: b
- let info = {
! _, I L5 n2 w& Q8 y; E - ctx: ctx,- c5 ?" Q3 v- j, u" C
- isTrain: false,
% T9 @2 P7 c7 G - matrices: [mat],
8 G Q0 B# O; l. ] - texture: [400, 400],
' w& p! E o9 p* U: A; j - model: {* v o( X* l8 w# t0 o4 n
- renderType: "light",
( @* M+ _4 x: v" m - size: [1, 1],
Q# d6 e% [+ [3 `: l, D1 k2 m - uvSize: [1, 1]/ }5 l R, u- z" K- D# Q' c: o
- }
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- let f = new Face(info);0 Z! ?/ j/ E* ^" ~ y0 }. _7 H
- state.f = f;
. l4 N6 {, s/ _: L4 p% O( O4 m
9 X3 j3 N( P- D* F5 d- let t = f.texture;4 y- P" q4 n3 T
- let g = t.graphics;" y" R( L3 s$ z, m3 X5 E
- state.running = true;
! B$ y: e, S, M% C7 u/ | - let fps = 24;
5 L& @! H7 |) \' ]3 w, ], q - da(g);//绘制底图
+ u- m$ T3 P# O0 d; V2 g# t A4 Y1 e - t.upload();
# X$ k- x3 \2 x2 t& }% S - let k = 0;2 n6 W$ v9 y M( |+ D& A1 x
- let ti = Date.now();
4 \7 Z3 A) X0 ` - let rt = 0;
6 I% ]" _5 p: B, h - smooth = (k, v) => {// 平滑变化
. g# i1 E$ |! [* S' U# L1 ` - if (v > k) return k;
3 V/ r; l6 P3 `; @ - if (k < 0) return 0;3 _* F" c7 G& e7 T% }. w; ^( {9 M
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
. ?1 ^; l/ O, ?" g - }5 }/ q/ O3 w C L" G, c
- run = () => {// 新线程
& k6 r8 N% g+ v* y+ |9 Q - let id = Thread.currentThread().getId();8 l, c4 D5 ]- x+ [; G- s) Y; |* D3 r
- print("Thread start:" + id);7 g& h" k% b, E4 d/ I% @# i
- while (state.running) {
' \) @7 [5 P; N - try {
( S# \( b& t' i; D |8 g5 C - k += (Date.now() - ti) / 1000 * 0.2;
, ?2 R' ]. o7 x4 Z2 F - ti = Date.now();
* o i3 a6 i! @4 i- F" Y0 J - if (k > 1.5) {& Z, M7 v* g! x9 s
- k = 0;
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- setComp(g, 1);
7 N1 M2 A; W8 z. _ - da(g);! P! }9 G9 z$ [6 ?( [! |
- let kk = smooth(1, k);//平滑切换透明度6 l& Y) I$ M& C6 ~; U+ Q% N
- setComp(g, kk);
! q5 d. `( U ]+ e8 P. @# x5 p7 K - db(g);
+ e; Q+ n Z2 L+ ^$ T; w - t.upload();
' e5 @. s! c2 q* R- @ - ctx.setDebugInfo("rt" ,Date.now() - ti);
; W m2 I. L4 a - ctx.setDebugInfo("k", k);
' C! {- F6 ?$ C: q - ctx.setDebugInfo("sm", kk);
% I t2 Q/ e& r m - rt = Date.now() - ti;
% _# v' D7 ]$ q - Thread.sleep(ck(rt - 1000 / fps));
+ `: j1 {1 h; e' [: N - ctx.setDebugInfo("error", 0)
8 B3 j r" I" W$ X2 L; { - } catch (e) {; S# r. ^) t6 i% |/ T
- ctx.setDebugInfo("error", e);
3 D/ q4 V5 c! m Q h - }
$ p. ?9 p" j- x8 k7 m - }
1 t/ P8 h& z& J0 O - print("Thread end:" + id);
3 D; I I# ^1 l" p8 D& s: V6 Y - }
; }4 X- P* m' m' c! r - let th = new Thread(run, "qiehuan");7 t( a, Y% Y8 j X/ d# }
- th.start();2 ~( c4 t' F* D
- }: m9 Q* `5 D0 G
; y4 Z5 \% y1 a- function render(ctx, state, entity) {0 t* N' E5 f0 A* y B: b, x% H6 \6 k8 w
- state.f.tick();1 p, u- D& h2 k% h6 u
- }6 @' G1 t: q. D' d% D8 E1 }7 |; B
6 k" C, b. p2 i& {# W7 S- function dispose(ctx, state, entity) {
: E1 Q, o7 a' U1 i - print("Dispose");4 T }# k: H1 _# H. L3 s* v
- state.running = false;
' B, c5 ?4 ~5 M% U - state.f.close();
- {7 ^1 C' {2 t# X0 r" D - }' W7 o- W( V+ G: f% z
- 8 ^0 }& O) a( J- t* P3 S
- function setComp(g, value) {/ e4 X& Z+ G- o8 \: o8 M+ E
- g.setComposite(AlphaComposite.SrcOver.derive(value));( G4 p4 q# d& o
- }
复制代码 . x3 u: P9 c6 W5 k* U
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)) } B+ M9 Y8 Y( x1 ?( P" I
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