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( K- o2 V O, k1 ~/ t& c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。" p% H5 L9 m5 ], l% F2 y& Z
- importPackage (java.lang);
9 M; v2 u- t' p' f1 |: c& q - importPackage (java.awt);
$ w3 I, @5 h! g/ ?8 b, p - 5 R4 J# ^/ {% [$ F: R
- include(Resources.id("mtrsteamloco:library/code/face.js"));- M9 v& {5 W" \; {4 K" `. I% k
: p3 C$ x2 k' I& k- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
+ d v$ D& O. b" T5 b5 Z - , v' Z2 R" O- J \$ F) T2 V& t, ]4 B
- function getW(str, font) {' U n7 Q9 m* P1 v; R! B& }, ]" _. Z4 ?
- let frc = Resources.getFontRenderContext();% U/ W( g) b+ }) l2 y
- bounds = font.getStringBounds(str, frc);6 I! _" ~/ a9 j+ ?+ Y
- return Math.ceil(bounds.getWidth());
8 X7 b6 w+ V1 ?' \3 ]6 z3 Z - }$ a. b h% m) Y0 @2 |3 H; e
f m) W+ | K) [& A* T; S) p- da = (g) => {//底图绘制' |1 A: x3 @; ~% H; ~4 B
- g.setColor(Color.BLACK);& w" e8 Z, L4 I9 R% @ ~6 i
- g.fillRect(0, 0, 400, 400);$ r. w8 U' q9 U
- }
5 K; ~& \( o* y/ K2 _2 z7 D - $ `, w4 l* y& c1 Q. F
- db = (g) => {//上层绘制- n' f; t% T+ X) c0 x6 S: j
- g.setColor(Color.WHITE);
( e( ]7 m) d, M4 N, z7 f) ]4 @# T3 W% V - g.fillRect(0, 0, 400, 400);
" n. G! |5 b o# j6 g - g.setColor(Color.RED);
* O/ Y. W& u/ @2 r' v- \ - g.setFont(font0);
: z- E0 h* d X - let str = "晴纱是男娘";- G* p+ D3 ^' R* f7 O' R
- let ww = 400; X {9 c5 S1 n
- let w = getW(str, font0);9 E" E, {0 K8 Y/ a
- g.drawString(str, ww / 2 - w / 2, 200);
4 a1 q' B1 f! t l. B1 o - }
_( [" X. R" @, I3 P/ d
* E' q( a1 w1 ~1 D* Z- const mat = new Matrices();0 D Q7 F0 _$ F: q, S) c3 r
- mat.translate(0, 0.5, 0);
; ]' D/ W2 ?, H" b- X$ w - 9 ?$ E% Y) P& \
- function create(ctx, state, entity) {% w3 f. ?- w" M2 c2 \
- let info = {
, r. b2 Q+ W4 x- \ - ctx: ctx,
1 n- S( Y3 x. r& v1 y - isTrain: false,
- e; C! j6 ~1 r, J1 U* P - matrices: [mat],
* @2 g! s, o2 P/ P - texture: [400, 400],
$ C& C% j. q" A* D - model: {0 ^+ ~2 g* g( a& b F( i8 i8 b
- renderType: "light",: A \' @' ]2 n, t! F# e
- size: [1, 1],
" v" n# ]. d7 I* p/ Y% Q- Z - uvSize: [1, 1]
j: q0 E1 Y s1 P/ Y# { - }4 l# |! T$ b7 d! ^/ J8 Q9 b
- }
( @7 H. Z0 }- o - let f = new Face(info);+ n1 b- b' ^, G# ?/ Y; o
- state.f = f;# _9 M& g3 g5 b2 g* Y7 m) p! O) V
- % p4 f( J- A( q; ~2 e3 D
- let t = f.texture;$ R) ?- y6 G* H8 Z8 A" m! h
- let g = t.graphics;/ v% J9 w, [# K" Z. h
- state.running = true;/ v, h* y, N1 N/ W: o
- let fps = 24;
4 H* H8 v7 o& ^4 J* J6 H% e7 x - da(g);//绘制底图
' F* a/ W$ _- ~, N - t.upload();
. m; m5 S, X- t4 W9 p9 ]! @8 [ - let k = 0;
* w: d3 }2 R0 A. B( v/ s - let ti = Date.now();; @; d* p9 \" l" \' _3 z$ b2 `
- let rt = 0;
2 x) J/ f: g7 X! h - smooth = (k, v) => {// 平滑变化
: e2 c, S! I- t9 b4 u2 C; I1 a7 Z - if (v > k) return k;
9 O' s2 o$ v a0 F8 j - if (k < 0) return 0;0 B m% }5 P. K! |: @
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;, T1 b& l1 o5 x) j, H2 Y) n) J% C
- }6 E* f! }' Y/ u2 }
- run = () => {// 新线程 ?/ X3 B5 m/ K8 t
- let id = Thread.currentThread().getId();2 Y$ I3 a& @0 w; }6 P2 D4 d
- print("Thread start:" + id);
7 \, z8 J8 R f7 e. v# ]9 H - while (state.running) {
* ? `2 V8 w. r. z) S5 p% k - try {# L( j% ?0 K/ q. ]
- k += (Date.now() - ti) / 1000 * 0.2;/ f9 I3 I! u" v3 D
- ti = Date.now();# p3 E1 p: a+ C" {8 M
- if (k > 1.5) {
+ K; }! X8 }& C, W - k = 0;
* P! d3 L0 S+ p7 D - }, V" }! r1 Y* a% N+ k3 R' _
- setComp(g, 1);2 T: o1 P( D* H
- da(g);
2 R- D0 b* p: q1 W2 I- m9 [0 G' \ - let kk = smooth(1, k);//平滑切换透明度4 J. ?: c0 b- {
- setComp(g, kk);8 }& L& _( ^2 p4 M; _
- db(g);
( o2 @8 P0 t) I0 E5 d7 n4 J - t.upload();7 }, y8 }1 c: X: M. X8 ~' n
- ctx.setDebugInfo("rt" ,Date.now() - ti);
0 v& L% [ L# z9 G! F - ctx.setDebugInfo("k", k);
$ A- n/ y9 [6 O- ^& ? - ctx.setDebugInfo("sm", kk);
5 v" e9 P O0 s) L: N8 t& P - rt = Date.now() - ti;: ]9 k8 G I: E
- Thread.sleep(ck(rt - 1000 / fps));4 j( j4 `0 a7 T3 J v+ P* t
- ctx.setDebugInfo("error", 0)
( t: c$ `5 G+ r+ t; Q - } catch (e) {
# ^, M2 X$ |- W) q - ctx.setDebugInfo("error", e);# y& J6 l' |; m8 e& L. C
- }! j+ P3 r8 |5 h! X+ ^; p
- }
5 }0 w+ o+ ]( f5 J: ^# H3 J. i# a - print("Thread end:" + id);! Q, _7 I. }0 _$ F) x4 `' N
- }
2 v1 t; b% K8 c1 s - let th = new Thread(run, "qiehuan");$ f; {6 P) [" {) N/ c% x" S. [
- th.start();2 b: S+ ]2 G! t' P- k) b; P
- }
; ?# v r# p5 d' {% y* G! k9 |/ h4 E( e$ R
5 T( n. M, S' `* ~8 I' \- function render(ctx, state, entity) {5 a0 n* q X) A$ y) K; `# Q$ T
- state.f.tick();1 X# b \6 N& O( c! t" Y& C
- }: A$ B' [- s* j' ^' _& [
6 B* x! j6 e. e6 p- ~& z/ \" u- |# l- function dispose(ctx, state, entity) {
" G9 j1 q5 ], k& J& N, J- [ - print("Dispose");0 O; D/ h* Q7 D6 m/ X
- state.running = false;
6 X' v9 F& s# d - state.f.close();+ i- Q s3 B3 ]6 |: q" S6 P/ x
- }, a) C- e; h/ G' @" k! u# E2 I. D
4 G1 ?# O( d$ t$ q3 P/ f- function setComp(g, value) {
/ M& z1 J* ^* y, A, Z* V6 _/ S - g.setComposite(AlphaComposite.SrcOver.derive(value));8 X! t- g+ w( z/ u
- }
复制代码 ) ~8 T; @1 H: B- n* K! j- P3 z
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。& z; ^( b8 e$ b0 p* Y+ p- @: q
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4 u" U0 F6 Q$ \7 _0 s& C$ Z顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)3 ~2 ^+ E! [: W7 `9 t4 {8 B1 @. k4 u
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