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0 s& J5 X. q+ u* B1 O) i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。
/ f4 W' k" N' ]% e3 \/ y- importPackage (java.lang);
# r5 z, c: S& I - importPackage (java.awt);
$ J. y7 @' L! s' n - " A) N& z7 N. p3 p2 m9 n* z
- include(Resources.id("mtrsteamloco:library/code/face.js"));
' a U2 t1 v8 y+ {1 j* ?9 J; N& z: ^
1 x8 d& l/ H" T+ y$ c' k. a- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);$ `9 f7 \( q0 L2 ]; M
/ ^+ j& f3 V. q/ z; C! k8 }- function getW(str, font) {5 g6 d( @! K+ z
- let frc = Resources.getFontRenderContext();
$ l# b5 J- G7 U4 h: W) g - bounds = font.getStringBounds(str, frc);0 }1 f/ ?- I$ ]- |4 i2 e
- return Math.ceil(bounds.getWidth());0 L1 ]/ P9 x* v( J, ?# {
- }+ @5 d1 y2 T! A$ ?) ]2 P+ `
- + o/ ~" u$ \+ P4 d: N
- da = (g) => {//底图绘制$ V, L) W; ?# G
- g.setColor(Color.BLACK); l" Q2 d: F$ h5 h( c* Y$ l$ Y7 s
- g.fillRect(0, 0, 400, 400);* E2 `4 H/ T2 w. ~" S/ e8 F7 n3 ?. J
- }* G# g ]8 u3 E! e% b3 f
- 4 m ~4 @/ t; M+ @. p# p$ a
- db = (g) => {//上层绘制
2 V! c4 y" m" }0 Q7 j: \ - g.setColor(Color.WHITE);
" P6 h `1 ?4 M3 D4 _ - g.fillRect(0, 0, 400, 400);
* w; ^6 V# |% B" r3 Z0 B - g.setColor(Color.RED);) }" ^2 x3 w" `, N3 H
- g.setFont(font0);
& a+ f2 g3 C$ B1 {; o. s- s( \ - let str = "晴纱是男娘";- m$ R) G' I: H
- let ww = 400;7 e$ m/ w* \/ g
- let w = getW(str, font0);3 H9 @! b0 m( o5 ^
- g.drawString(str, ww / 2 - w / 2, 200);: L2 {4 |) q. W2 c
- }
' g9 b# _! D1 B
/ b& A/ B0 \' v' N* c5 S- const mat = new Matrices();
% Y/ J. I0 r- Y- F1 R8 g - mat.translate(0, 0.5, 0);
, G& |6 e! M# N" P
. i# }+ s- v8 r- function create(ctx, state, entity) {! g. {$ c% S& J2 a& J! g, m
- let info = {, l6 O. L7 z; c* T: u2 f t
- ctx: ctx,0 D! b6 [8 |- F; e x
- isTrain: false,& R: ?+ r: d1 f: {+ _! L
- matrices: [mat],
& l6 C, x' u7 ^- ?! i1 h - texture: [400, 400],6 {) y3 I. y* B$ X- F1 g
- model: {
5 k* Q$ ^. H9 K8 E - renderType: "light",2 O8 v$ i8 R3 b2 r2 ?1 ^7 Z
- size: [1, 1],- C' @! M3 {- p& D
- uvSize: [1, 1]4 e) | c0 x. j
- }! ?' H- M% s: A% B3 X3 F
- }! ]- d# C/ q! y) }3 n- z
- let f = new Face(info);# q: Z T2 a$ C' B( V
- state.f = f;9 n7 z- j9 F% X
- - e" P7 m" G" Q; ?1 [; L& C
- let t = f.texture;
7 N# o! L) `2 P4 @2 |+ } - let g = t.graphics;
2 h- L7 r X$ e3 [2 i$ a% F% I - state.running = true;" J/ }' c3 f: O3 p6 ^6 s. W
- let fps = 24;
) M) }2 G7 z, \( k- W0 l; f' {, L - da(g);//绘制底图
+ A0 n+ A- s( X/ \& Z! j - t.upload();
/ @5 J# b6 u s6 c - let k = 0;' X0 M+ S: J4 p" B2 J7 u! |$ [8 K
- let ti = Date.now();
* _9 R* D0 h1 U/ f) @; G4 [* P0 [ - let rt = 0;
M6 W8 j; Z e, X - smooth = (k, v) => {// 平滑变化" ?$ F$ ]: g8 P% k3 S) @
- if (v > k) return k;' s% l0 t* Y- j( z% J
- if (k < 0) return 0;
/ M. N5 a. h, H% O# H - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;9 y, D* W8 h8 {
- }
7 k' K+ k& B+ n# a5 u9 c, j - run = () => {// 新线程
+ A @3 p ]6 J( L' O& z - let id = Thread.currentThread().getId();
- V/ Q2 z, D# o( W+ O3 ^ - print("Thread start:" + id);
% }* b; l g8 x! I( D$ C - while (state.running) {/ w5 Z3 S+ W) _- H
- try {
8 Y+ e7 y- z1 ]6 o5 b3 j3 d - k += (Date.now() - ti) / 1000 * 0.2;
: ]. j) r1 \2 Q! F% M - ti = Date.now();) h! y7 L' [- M& d) F6 y
- if (k > 1.5) {$ j' B( ? G) x
- k = 0;
: n: F0 Z$ d) }' \0 W9 \# a, T7 ?8 ?/ s/ l - }
/ o2 @, Y$ w% Y: p3 W - setComp(g, 1);, T* e; C6 j& y0 a% |. C$ a
- da(g);
8 m0 J! B, u/ _. @ - let kk = smooth(1, k);//平滑切换透明度* n5 p( u4 L' `
- setComp(g, kk);
) g: f: s# Y. ^$ Y8 b - db(g);5 |7 @6 `. {( G
- t.upload();
: F$ y* k$ p9 E6 u - ctx.setDebugInfo("rt" ,Date.now() - ti);
! x0 r4 U: D$ S8 S+ J& M1 i+ N - ctx.setDebugInfo("k", k);
/ X0 k6 L' w* B2 a - ctx.setDebugInfo("sm", kk);+ c) a7 x$ K: W" Q; {) c4 r$ ^
- rt = Date.now() - ti;
# d6 ]* {8 n/ V - Thread.sleep(ck(rt - 1000 / fps));$ X- o$ c) e& W7 l8 z* d4 h& P* Z
- ctx.setDebugInfo("error", 0)
! N( T! A' ?0 ]" o( f3 }2 E% C - } catch (e) {, g* O! w2 Y" I$ w* z
- ctx.setDebugInfo("error", e);1 A2 H g1 p& V3 F% P+ _; ~& t
- }
5 L* o6 D* S# {4 D+ i9 ^) I, ~' r - }5 u! j7 L l: t: v% t9 q
- print("Thread end:" + id);% L& q+ r8 _/ E E P2 `
- }: q, l& m' q( @& y/ v: {% Q
- let th = new Thread(run, "qiehuan");
: {9 [ t& @+ G( `7 m - th.start();
) n' H( h/ i Y8 F) h, G& o - }
U! t8 B) k% h" B$ H5 q - ^4 d# y- U$ _3 [/ S2 [
- function render(ctx, state, entity) {
# r: O. B( t' k+ N5 p2 {# m+ D4 q - state.f.tick();
l! y% v- G, G. R2 r2 F - }
8 p+ k+ |! @9 t) J
- D8 E2 h3 N% k, f- function dispose(ctx, state, entity) {( L! Q0 R3 n/ ]; E% p% Y( m) h; m
- print("Dispose");
9 F. \5 ]$ X" S/ O" Z, d - state.running = false;
; b! F9 w5 c! y8 I) j4 ?& c - state.f.close();4 d P0 A1 O- c1 J
- }. q! y1 w6 ~2 E$ `
- H( k k G( {8 U
- function setComp(g, value) {) \9 ^; G4 Q0 R5 [4 x7 _
- g.setComposite(AlphaComposite.SrcOver.derive(value));
! o* S9 `+ W5 k& V( g3 w - }
复制代码
2 N2 a9 g2 p7 h+ w/ ?( a/ Q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。
! t+ D! L1 K) ?( e$ B2 {) Y3 `' b" z6 L% |0 j b
7 e- m7 }9 J% `/ p) N2 W/ X顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下), r4 Z( ?1 x$ o; @( U" G: E1 `
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