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' K1 B8 n2 O! c5 p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。7 w" S. T. r& v1 B# V
- importPackage (java.lang);- ]% Z. i! y% F: X# D
- importPackage (java.awt);, F+ }5 O& d3 s" }
% T Y4 X7 D2 n; U6 |- include(Resources.id("mtrsteamloco:library/code/face.js"));5 l' n( Z; }0 z, m1 l
/ \+ m8 P! V, A/ Y0 i* Q- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
* S7 e [9 O! { @* y( ~ - # l" ?2 C9 c% M2 Q/ E/ `# S$ m
- function getW(str, font) {7 v1 P1 u. V* r1 B
- let frc = Resources.getFontRenderContext();/ g+ d# Z3 I% o/ |. _
- bounds = font.getStringBounds(str, frc);
4 P" V: M0 g3 W8 x8 f1 S - return Math.ceil(bounds.getWidth());
* Q1 [% j- ~7 |" m9 x - }* F- S9 Z" v5 n/ T
- n( w( H/ b" `. p# c1 p, P
- da = (g) => {//底图绘制% p3 K, q4 n) A$ i2 p, m
- g.setColor(Color.BLACK);" s3 ~, y( G$ K# }; o( n* w" E* ~5 S
- g.fillRect(0, 0, 400, 400);8 [) S) t0 h3 j" b6 p, Y% H
- }3 J4 f/ X. {8 _$ B
( e& N( z P- x) o! k- db = (g) => {//上层绘制
; u$ Q; \" z- Q: r - g.setColor(Color.WHITE);4 m+ g: n- u5 @7 H
- g.fillRect(0, 0, 400, 400);+ R7 z& Q) z5 |; {3 Z' |2 o
- g.setColor(Color.RED);
. F; m2 B& i9 b+ s" s) O$ r+ o. P - g.setFont(font0);* C e4 p- F) h9 H9 L9 N
- let str = "晴纱是男娘";
' @0 g- ^3 u9 q2 t+ Z( `" @ - let ww = 400;
# ^! R! w( e/ R9 N5 B R4 f6 e - let w = getW(str, font0);9 n7 W+ I% C) k0 s
- g.drawString(str, ww / 2 - w / 2, 200);) q2 [) x& q! E5 Q$ D
- }& _2 k4 `0 ]% u: E: H
+ g7 K& z* t- n1 h: E, T2 R- const mat = new Matrices();" t' h9 D4 y6 I; h# a) S7 D# [6 t
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {& }/ C& R. N' ]* u0 u2 U
- let info = {2 ~! N" S+ J8 Z( L+ N3 a' @3 `
- ctx: ctx,
/ {8 l5 F# H: J6 k" X1 @ - isTrain: false," u8 Y/ i, K# z+ p0 {5 T
- matrices: [mat],
# T+ \+ N, z$ g1 ], M$ i - texture: [400, 400],5 K- v% }- I- ^' x
- model: {: g8 H& o. }4 o/ B" H8 ]
- renderType: "light",
* r7 w$ T+ s9 o/ o9 h' c - size: [1, 1],
: b* h3 M5 ]3 a0 Y2 M$ N- M - uvSize: [1, 1]
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- }6 l; X5 p% l7 h+ _0 J
- let f = new Face(info);4 P1 q6 O( B v1 v) }5 `
- state.f = f;' W* _3 E9 j0 K4 Z( m
2 {) h9 d, [% P! ^, n8 u7 Y- let t = f.texture;
) e* C0 D% v; H! c! B - let g = t.graphics;& w; \" W; x* ^+ L% f
- state.running = true;9 B& j9 i: C+ m$ k! z9 F
- let fps = 24;* ]3 L+ J: N* W a! u8 D
- da(g);//绘制底图, g# H! m; v y8 t! \; V" A
- t.upload();
5 E- F: i* i& r+ d# \: T3 r8 o - let k = 0;% S# l" {4 \- g( ]& _, i
- let ti = Date.now(); E. `* |* n' A3 X" f& ]4 b
- let rt = 0;
5 W$ m9 |# u7 P( s - smooth = (k, v) => {// 平滑变化- N0 }, f# H! y4 d ]% h
- if (v > k) return k;
8 {9 T+ p% b' Q* O6 } - if (k < 0) return 0;
/ b( s" E$ G+ x/ W; T7 @9 m+ u/ u - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
6 F* n8 v" ~: P) r4 x4 ?) _ - }) A8 R( {9 [. I( O8 C
- run = () => {// 新线程1 w% ], C) U) \1 P
- let id = Thread.currentThread().getId();( B+ }% Q6 O+ t" I
- print("Thread start:" + id);7 g' Q! O7 |( `; y: N
- while (state.running) {
. Y1 k4 ^$ R2 k: } - try {
) W- t0 h$ Q' ` - k += (Date.now() - ti) / 1000 * 0.2;, q. m. X4 ]1 ]- c
- ti = Date.now();
8 I9 }* ]4 r* F" N6 _" v - if (k > 1.5) {
. C1 R$ {- k! b4 F7 c: l - k = 0; G6 K% S$ L8 q; {- K. H
- }
! ~, V/ M: ?6 Q6 L; _ - setComp(g, 1);
# s8 i7 A; J5 g% g: T+ T - da(g);
6 K4 C) w2 P, d! @+ b( | - let kk = smooth(1, k);//平滑切换透明度; c. t$ o' P7 {, m4 h
- setComp(g, kk);6 t7 y: {5 Y/ G# @. J, |' ?
- db(g);; M1 W* r. { H% I& h
- t.upload();" B% s, Z" M4 `" ]# ?+ D/ o; }4 y( y
- ctx.setDebugInfo("rt" ,Date.now() - ti);$ U% D/ a" _7 x% N9 D9 j n
- ctx.setDebugInfo("k", k);
* a! M) ^6 M; B& r - ctx.setDebugInfo("sm", kk);
) D, K, v5 q4 L - rt = Date.now() - ti;
. W% O" W9 R! o6 q& F - Thread.sleep(ck(rt - 1000 / fps));1 g+ H8 b% q6 g5 `6 E/ ?8 d
- ctx.setDebugInfo("error", 0)
+ H+ B7 ~2 w" ^% j" A) q/ D - } catch (e) {
( {1 i4 u" F8 `1 q6 P9 n( R - ctx.setDebugInfo("error", e);
, N9 \( g* {4 D: w1 x. n8 P - }6 p8 E! J) P) e# P3 z- K4 y& C
- }
3 }" J+ Z) f( l) A9 H - print("Thread end:" + id);
7 g: E) |- f# [' j V( F' L5 E - }% r- ?$ w, `" ~1 |! ^1 m
- let th = new Thread(run, "qiehuan");1 R- Q5 ?1 s( e& y' H/ C
- th.start();- o! j4 k0 V" E
- }# F: i! w. }0 N& {0 K/ h
2 Z M( e* W5 U8 b9 E0 T+ h- function render(ctx, state, entity) {. L8 U# H( f1 G0 `" s5 W7 t
- state.f.tick();
6 W+ ?& b# ?6 U - }5 [' g: J. T Z0 e& x
- : V* W4 p8 V/ j. M. L" Z, D
- function dispose(ctx, state, entity) {
- i. K1 R& n% w. X O - print("Dispose");
4 {* O* x% |8 b, r9 B/ F; `1 l2 c - state.running = false;
" c6 k# {) x& D) E7 p+ I6 w - state.f.close();2 [, y- o. n! |+ K3 c+ {; u
- } D' g) W9 Z6 V& C/ N- x8 u
9 L- ?2 d6 ^4 n! {/ V: v9 v- function setComp(g, value) {
7 w9 O7 r* t) z( e5 X) X - g.setComposite(AlphaComposite.SrcOver.derive(value));6 o1 {' P* e0 X9 E% k* c. }
- }
复制代码
, \% c+ e9 `# f% h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。9 D3 w3 n( l! r. O4 _
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; a T- ?+ J5 Q2 M4 v) P顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)5 Y9 |7 M4 v6 T) [ Q" r2 i5 T
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