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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" @: e W5 L7 ?, r% o+ f. n D( d
- importPackage (java.lang);& F* V$ x; ^. g
- importPackage (java.awt);
g" m5 U& c4 {/ {$ Y* A7 N. e - 8 v$ \. O7 d- I1 J* Q, m& {
- include(Resources.id("mtrsteamloco:library/code/face.js"));) P* t3 N6 ]2 V% J' O
- # s* e' P( U1 P+ U0 Q
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
- |0 s, w: R+ y$ z2 S+ }0 z L - let frc = Resources.getFontRenderContext();
5 i! `- H7 l/ D2 d5 K - bounds = font.getStringBounds(str, frc);
# ]. @3 u6 q7 C0 W; D - return Math.ceil(bounds.getWidth());
: Z# f0 k) X, }) d5 `) m0 R! g1 i - }
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- da = (g) => {//底图绘制
+ q' O* Q: r% S- l2 A& ^) r% Q7 @ - g.setColor(Color.BLACK);5 p8 k5 [+ V( [! S
- g.fillRect(0, 0, 400, 400);2 L2 k9 @0 ?, }- i# {
- }
+ e! u8 h$ H3 g4 |( D; _ }2 g - 8 s! J" Z. X9 t! C) R, q
- db = (g) => {//上层绘制" z2 \* }6 f: @# ?
- g.setColor(Color.WHITE);
% o, g1 f5 z; Z* u9 s* { - g.fillRect(0, 0, 400, 400);5 Y _& Q+ W2 p6 ?8 f, @4 \2 t7 s
- g.setColor(Color.RED);: { N$ l2 E0 D0 P) d, X* i
- g.setFont(font0);6 ?3 t; T. t8 |: F& X
- let str = "晴纱是男娘";* f P0 x7 M4 y+ K
- let ww = 400;
! g6 ?! E) b+ P* I - let w = getW(str, font0);& n7 Y9 M. @8 b7 R- S( s! ?8 j
- g.drawString(str, ww / 2 - w / 2, 200);
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5 V' K/ x9 C c! s3 a: a4 J7 A- const mat = new Matrices();3 \4 n0 O# }/ Q0 N& [( { R
- mat.translate(0, 0.5, 0);
' y+ x: r: _9 n3 {
( @ P D' U5 Q- function create(ctx, state, entity) {
8 R8 s3 m8 n' X* k% C6 h - let info = {1 c% q: H( D# I, N- K/ g) T- n: v% Y
- ctx: ctx,
' H7 d W& P5 G5 r2 w7 D$ x - isTrain: false,
) C$ H' Z/ q* ]* `8 p, L - matrices: [mat],
% ^# X. i8 }3 d% a+ k9 e! I/ `# c - texture: [400, 400],- z/ l4 S% h8 c1 Z3 P1 s" _
- model: {
2 t+ g5 l7 @% Y6 q d) G - renderType: "light",! q1 B- [7 h' S ]4 l, k
- size: [1, 1],
( Q6 o. {- ?: j U& o* G$ Q - uvSize: [1, 1]
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- }6 m' n, Q# i7 s2 p' L: Q R0 E K
- let f = new Face(info);
" ?# }: P o$ @) {1 n# H' G: o8 Y0 J - state.f = f;
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/ Z. b7 @5 U+ i. _! Q9 H! k- let t = f.texture;, H! I0 h4 N2 q0 R2 \& a7 C3 v# V
- let g = t.graphics;
3 U6 P r. ]" l; z: \2 l- l - state.running = true;$ i5 C' o4 \4 Y' a2 A
- let fps = 24;% V) b1 a6 ?+ P: B( T% @& c+ C
- da(g);//绘制底图
$ W! v) y* O& c2 S1 W - t.upload();
+ Y) J) L# q( L" s& r8 w' B+ { - let k = 0;4 Q* L% G" k. @! M f1 m7 u ^
- let ti = Date.now();$ e% R) D: `, B3 N+ d/ A6 H; B
- let rt = 0;. K+ h8 N. U- C7 V, g( `2 i7 B0 e% s
- smooth = (k, v) => {// 平滑变化
! r# V% V1 S: ]8 {' Q - if (v > k) return k;! r2 J+ B6 t. ?
- if (k < 0) return 0;$ ]$ w# d/ s& u2 s$ v. I
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
$ ?, w3 ^# q0 P& x- j - let id = Thread.currentThread().getId();$ b! J+ s) k' a' g7 t! J% F) d
- print("Thread start:" + id);
6 r# p& R5 k" N. \# E& Z2 T - while (state.running) {
& s2 ^" b- N/ ~2 }) w3 ^ - try {
/ t& k6 A1 c, s# q1 a% k- ^- \ - k += (Date.now() - ti) / 1000 * 0.2;
! v6 K& [% \8 u" p, M - ti = Date.now();! ?1 K! F1 L* z! O6 K3 l" j
- if (k > 1.5) {' m9 G7 R1 `& ]% G8 ~& \2 T
- k = 0;. d: ^6 S5 {. |) ~5 V7 D9 ?/ a
- }5 L0 K4 c0 L0 D! w- f
- setComp(g, 1); T- }, W4 \6 s) d( d
- da(g);6 p' J( N' o6 _
- let kk = smooth(1, k);//平滑切换透明度9 N- y' S& a) f' o/ [( [- V1 F
- setComp(g, kk);% x( E' a4 M& M1 d! E! I( i
- db(g);
/ @6 N) B/ Z6 \! k5 X( g/ s - t.upload();6 N% y3 E! F- G! [2 L# F b i
- ctx.setDebugInfo("rt" ,Date.now() - ti);% z3 V1 O* l- D, E+ u$ U1 q6 M
- ctx.setDebugInfo("k", k);
# v! p1 b, p. V7 L; y* D - ctx.setDebugInfo("sm", kk);( w5 D7 N* K. z* \* v: b2 J1 b
- rt = Date.now() - ti;1 b y- E( A* P( n
- Thread.sleep(ck(rt - 1000 / fps));
) F W) \. G5 ^( k/ u1 {' G; C$ U - ctx.setDebugInfo("error", 0)
7 Y) N$ f, ^/ N9 b. G+ u3 F - } catch (e) {
3 v* ~& e$ q y4 s; p) v - ctx.setDebugInfo("error", e);
u: c0 B% ^2 \6 o8 E, Y: s - }
- q/ f; N6 q2 q9 ]# b4 H - }
. o1 \) @3 j# \! y" z: z- q - print("Thread end:" + id);
9 |! c& E# V. G. `/ ]/ p+ y - }
8 q1 R. @" f0 \* t o' T - let th = new Thread(run, "qiehuan");5 }# n8 I0 c$ q9 `
- th.start();9 C: C; _+ G2 x2 W, y5 O o0 w# K! l
- }( N2 |6 V4 g$ o9 j6 @, V, ^3 M
- ' a$ {4 c7 p# R [* g( d
- function render(ctx, state, entity) {
" Q) H# m; G4 d8 B% k# b/ H% N - state.f.tick();9 @. z2 _* j( A. j% f! a; `
- }) h5 B5 i8 v) I5 J7 G8 ]1 {9 Q
5 a/ E- ~, B. Y: b& j9 ?' a1 V$ f- function dispose(ctx, state, entity) {
1 ?3 v( U7 S* p! {% Z - print("Dispose");# y1 g5 P! ]9 ^: S2 K
- state.running = false;
& w; P$ m6 [1 b# I2 t - state.f.close();0 Y T* X9 `' M
- }
# ?5 j5 w& h9 ^3 h$ i - % V& L* O$ N5 e* C4 J+ `% [' @
- function setComp(g, value) {3 |3 y& {3 Z& L8 k7 j+ o6 V
- g.setComposite(AlphaComposite.SrcOver.derive(value));
( E+ r! l* d4 ]& m" F4 y - }
复制代码
6 `, O" W5 ]# u9 i+ K1 a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。; V; `( Z, {+ l) d3 w1 C7 |& m# E
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' o+ p: I( u H8 f) N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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