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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。+ M+ R, G ~( ?$ y
- importPackage (java.lang);1 Z+ N5 Y7 ~+ A9 n& q* Q
- importPackage (java.awt);( k, f- ]: C& f" y P3 H
3 A( x7 \& c- l% v9 Z$ x2 i- include(Resources.id("mtrsteamloco:library/code/face.js"));( K% M* f `" l+ z3 `, \
5 \) X9 Z, o, f3 w" e- f- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);& a+ c N& k9 |8 H/ H& ?# n' O
- 0 m' V1 c ?8 w4 k" V M
- function getW(str, font) {# M! r$ C0 u& \ o: h1 F2 N
- let frc = Resources.getFontRenderContext();& w+ |3 o3 r" ]) T' p ?
- bounds = font.getStringBounds(str, frc);$ F ~& V1 o- G- ` N; ^
- return Math.ceil(bounds.getWidth());
7 s! o% V& V3 G+ h - }
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- da = (g) => {//底图绘制# y0 ~. }6 b* U- x8 d
- g.setColor(Color.BLACK);4 y( L) z- J. p' U" d' p
- g.fillRect(0, 0, 400, 400);" ]( w7 D& Z3 f3 |: O. D6 G U
- }0 ~& ]/ Q: M8 }! r) g6 v- M8 o' ^
1 {, G: {5 E3 N" `/ L2 |7 o- db = (g) => {//上层绘制( _* t: |- ?) v& _
- g.setColor(Color.WHITE);
0 n. c4 o/ }0 I! `* s5 h - g.fillRect(0, 0, 400, 400);% H/ D. L- \ [6 }8 _* c- u
- g.setColor(Color.RED);
3 l5 I( G$ g( ?3 K6 d# X3 h% j1 h2 V - g.setFont(font0);
, y8 Z/ h! W) X: O$ v9 |4 L - let str = "晴纱是男娘";
- E" s# i5 |! M8 Z, C5 M - let ww = 400;
! K8 e! E1 z: p( ]8 {* B - let w = getW(str, font0);0 s' h% Q, \1 L! Z" u
- g.drawString(str, ww / 2 - w / 2, 200);8 I; C% l0 f/ H: @7 n+ j
- }4 k% C- ~, G4 Z' x6 b2 q0 u
- 6 V2 u. S; E' o
- const mat = new Matrices(); J* A! Z: d! ~6 P0 W+ B
- mat.translate(0, 0.5, 0);" r; D6 y3 v* O/ M# C: x# L3 ] k
- 5 v8 B: \; U+ e" G4 C( M/ c# `
- function create(ctx, state, entity) { b1 z C+ ?/ K2 M
- let info = {
8 p- D$ m5 f6 h# |: v - ctx: ctx,; X6 X& t; T5 w0 A7 p) m& w
- isTrain: false,
( H7 f4 `+ v" @ - matrices: [mat],
5 I! {/ p( {, ?' R2 R - texture: [400, 400],/ o0 P4 \) J/ \" W( b0 B
- model: {
4 m1 V( A* |% K6 z; T+ F - renderType: "light",
- y {- K1 f$ {6 o' ? - size: [1, 1],
, z& d/ F& w8 O# f: W0 W6 n - uvSize: [1, 1]* N) ~& z& E3 Z. f( u+ u9 E8 d0 U
- }
' Q! |4 C: D. `9 Y - }
# i# J9 z9 H. C+ ^- o - let f = new Face(info);+ I1 f0 y9 q: H s
- state.f = f;
. C! L# l' f- W7 R, t2 f9 X+ n
3 y, x5 @: t4 w" O- let t = f.texture;
9 k7 J& s0 o$ _- q7 u+ [8 m4 w - let g = t.graphics;
# R5 [3 y$ }; j - state.running = true;
. Z" |. H9 C: v, Q( h - let fps = 24;
/ m7 u. c: G$ o - da(g);//绘制底图
4 i3 J8 o* K$ ^ - t.upload();
/ L1 l/ d3 d& q N - let k = 0;
: J0 y- |& L; z - let ti = Date.now();2 _$ P( J2 J9 \4 H2 _, a8 E
- let rt = 0;# ]% L) a2 X$ [" K6 E9 }% e
- smooth = (k, v) => {// 平滑变化
; \* E( z% ?# E) g6 V ^ - if (v > k) return k;
4 p9 K' `; o) O0 B+ } - if (k < 0) return 0;. j2 `' F* f1 O6 D, @
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;$ A1 ]2 l" ^ k$ D! a& C4 ]8 j% d9 M
- }( x! K# {) l4 ~, [3 Z! Q
- run = () => {// 新线程
T6 w M7 X/ R; F. ~" [& Y# h - let id = Thread.currentThread().getId();
% U& c- `4 o# U& Y& u- J - print("Thread start:" + id);1 V6 T. r. r* \+ c9 d
- while (state.running) { [( v3 F+ Y) a, `8 i8 ~7 p
- try {! O, ]) y& R% L/ \( z
- k += (Date.now() - ti) / 1000 * 0.2;( w2 M# I2 W- l) z4 e
- ti = Date.now();. I$ _: e' v+ j
- if (k > 1.5) {
2 f7 W3 q; L# H' ` - k = 0;
5 X0 m! A* C1 }' D) C - }
* x) Q! m6 U) j. [0 B, X8 M - setComp(g, 1);
; h A A( Z- a5 ?0 n- t& I1 h - da(g);% N. X ] M8 i2 A
- let kk = smooth(1, k);//平滑切换透明度
$ D! H3 ?/ ]0 Y0 |- v, ^% E# B - setComp(g, kk);8 j. C9 x' o6 N4 x
- db(g);; J/ U! c$ y6 C6 ~* ~
- t.upload();
( q$ D% H5 } S - ctx.setDebugInfo("rt" ,Date.now() - ti);
( y3 m! ?& {) D( c - ctx.setDebugInfo("k", k);) q" a) G) G3 U0 E* e
- ctx.setDebugInfo("sm", kk);
( i) C4 _" S* I, O - rt = Date.now() - ti;
- X" f/ J6 ?) R$ V% x4 l - Thread.sleep(ck(rt - 1000 / fps));
* o# u8 I+ r" C5 B7 K1 ] - ctx.setDebugInfo("error", 0)
; R$ e& d, X: e& g$ q- ~% f( N N/ d8 w - } catch (e) {
( @. P; m* o. A - ctx.setDebugInfo("error", e);
7 s2 P/ d! y+ \- h ? ^ - }3 F1 C3 B% V+ \3 }: B; _+ V. U
- }
. m3 C- B* n: i! s( r; O - print("Thread end:" + id);' o3 l, T$ h1 g7 u
- }
1 F& k7 l; y: F* Z R; t/ v$ D - let th = new Thread(run, "qiehuan");
% I: E! p, V1 P, i% z3 b/ q7 V - th.start();% M/ ` {# t; l
- }2 O$ p9 n$ S* Q4 Q J$ T& g
2 g0 W: b: D) w8 Y& O( i- function render(ctx, state, entity) {
- e# K# C4 _4 k" k5 b9 b- R - state.f.tick();
) S5 Z: [. O: M8 ?# ^5 R - }- v5 v* r& V% s( V+ n
7 c+ m8 X* U6 c2 j3 C- function dispose(ctx, state, entity) {
4 f. R T. c1 K/ P- a, W' [ - print("Dispose");
" n2 D4 Y! o! w4 ~ - state.running = false;( Z* `4 n) r; e7 u# c- z
- state.f.close();: I: U# q8 t9 A. }
- }4 v+ t1 p: q7 t% p; W
- 7 @8 M7 J9 P+ i4 x7 J
- function setComp(g, value) {
" {8 o8 n1 l( q0 |# [# ^ - g.setComposite(AlphaComposite.SrcOver.derive(value));$ H \# t8 B+ O
- }
复制代码 & i) B u a9 | W8 _
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。$ s9 I( }% ~% G- z- p
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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)
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