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d7 X" i) h% Q$ 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。
" _: j& {! A) |" m$ z- importPackage (java.lang);
% Q, F8 l0 }4 r, I - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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& m1 _8 ?7 W0 @/ m- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
) e4 Y$ G- N8 I1 s - let frc = Resources.getFontRenderContext();4 C( h" R! A) o Z, t; F2 U( F
- bounds = font.getStringBounds(str, frc);. S, v. u. I1 W' j! J
- return Math.ceil(bounds.getWidth());2 K7 x0 Y5 O5 m7 D
- }
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- da = (g) => {//底图绘制
% k( ?1 s% ^. `- W9 b - g.setColor(Color.BLACK);
- L: m& O' M d9 x7 {( k - g.fillRect(0, 0, 400, 400);
6 s. G* a- d6 g - }
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5 G; A6 r/ H6 J# B/ i, q$ S- db = (g) => {//上层绘制/ q. U0 r5 o& e& s! d
- g.setColor(Color.WHITE);
6 [& b8 O% T( s4 U - g.fillRect(0, 0, 400, 400);
" o. m7 c% K: q) j y5 [ - g.setColor(Color.RED);
" c1 C9 I5 G+ x0 Y% h0 _ - g.setFont(font0);
+ f% N' S! q0 Q2 u) w - let str = "晴纱是男娘";; W1 o6 c7 {% h
- let ww = 400;$ D/ u' q3 T7 m5 Q( J
- let w = getW(str, font0);, O: q Z! x& M# m. c" z: T
- g.drawString(str, ww / 2 - w / 2, 200);
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- * r) \6 U7 H9 g
- const mat = new Matrices();: ~2 L& Q7 ^& |( v# b( u1 S
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {# v5 ]& T; w; ]0 V% z3 `2 R
- let info = {* R/ ]" z: G. j; b9 \0 t% Q
- ctx: ctx," X; N! r- g4 \9 y# i4 {, u
- isTrain: false,
/ \3 Q. ?) h1 c5 l6 A - matrices: [mat],: G. G# b4 L+ }7 e
- texture: [400, 400],
/ X8 Z0 b' F0 ?; V - model: {
8 K) ^" l7 z& F& n - renderType: "light",
5 h& w/ ~' t* I' C2 k7 x* }* I+ }% ~ c - size: [1, 1],. A4 h9 b" E) y+ h% Y ~
- uvSize: [1, 1]* V. a( L6 w( @" e: G, b8 w: a+ c5 Z
- }$ J$ X$ V5 f5 `& T1 d
- }
5 _% V. p* ^( o - let f = new Face(info);
* w. ` F4 {( v Q - state.f = f;1 y% w( M1 c! p$ O0 ]! o9 t
- ; b/ M9 N! P! B/ r$ J
- let t = f.texture;7 D) e1 n% I6 O5 Q; d4 h1 W: m
- let g = t.graphics;4 D$ O( h: p2 d; g) H
- state.running = true;
; c- [- R, w3 K; a8 j0 ] - let fps = 24;1 O1 |& C4 G" b" o( L
- da(g);//绘制底图& t! y2 z: N7 h# `
- t.upload();
* G( F% d; Q" A - let k = 0;, @; v: r$ a8 }; M. c1 [( c7 q- A
- let ti = Date.now();
' ~! ~- q, B7 X4 K' \ - let rt = 0;2 V. ~& J8 M7 g. l
- smooth = (k, v) => {// 平滑变化
) N8 n5 J, f/ @9 s( w- q, w; v - if (v > k) return k;% R4 ]5 o& ~0 H1 c( s1 ~
- if (k < 0) return 0;$ S" n8 n# E+ Y3 C
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
- {5 z7 v# U2 @( B1 } - }, I( X. N4 J( F; }$ l4 m+ z) l
- run = () => {// 新线程* A; E, G) ?- u8 G S
- let id = Thread.currentThread().getId();
. Q V, I4 Z, F9 D$ a( r& y/ x - print("Thread start:" + id);# D5 L% t N _/ O- u: V3 @& l. s
- while (state.running) {, h* _: ~; U8 |+ ^. |! Q* E
- try {
% _( T0 {$ A3 K% I e5 {- ~+ p - k += (Date.now() - ti) / 1000 * 0.2;
/ X$ U5 b9 H3 D6 V7 r3 u9 a* ?( W - ti = Date.now();. d f9 d7 O$ E( ?7 j6 j6 B
- if (k > 1.5) {
6 ~1 d% o$ K" r5 r" G* u* y, m - k = 0;' i) S* R/ ?# ?7 X
- }
' s! W- B& Z5 o5 |- D. y8 u/ E* k' A - setComp(g, 1);
|2 l) b, l U A4 o5 y' @1 p - da(g);9 d- J% g g; f3 [5 a4 V L
- let kk = smooth(1, k);//平滑切换透明度7 N) F) E7 S; a4 r$ g: v0 w
- setComp(g, kk);
* k x8 L' U, R7 @! N& ^ - db(g);
( ^ [- z8 |2 R3 Q! ^$ l7 Y4 V% N - t.upload();9 Q4 s' ]' N4 K$ x: n3 D8 L
- ctx.setDebugInfo("rt" ,Date.now() - ti); q7 p0 N. P5 Z Q0 V0 L) ^6 F. u( Q: n
- ctx.setDebugInfo("k", k);
U9 d, }0 F9 p - ctx.setDebugInfo("sm", kk);
: a. {4 f8 j) q - rt = Date.now() - ti;+ V. L6 q# w/ r6 Z6 R9 u: w% W, t
- Thread.sleep(ck(rt - 1000 / fps));
2 s" j& i+ V% Y% @' Q# E" T - ctx.setDebugInfo("error", 0)
/ j; h8 m) h8 H6 L" e: x. x8 K7 W2 _ - } catch (e) {* m% ^, D ~0 F$ s
- ctx.setDebugInfo("error", e);
w0 B/ e7 D( h0 {+ m - }
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- print("Thread end:" + id);
* e* D3 g% U% V+ {" R+ A& |* U - }
2 H' U' D! [- `, R+ a5 `3 V/ Q/ Z( j4 s - let th = new Thread(run, "qiehuan");
: T5 ?* e4 _! p - th.start();$ b% }! Y4 N& t! ` J& S4 s+ ^
- }
" K" N: x* z# Q! s: G! h - % L! D6 d2 B9 x7 t- p7 {
- function render(ctx, state, entity) {
) L$ s* b8 u7 F# h0 I) b6 [ - state.f.tick();; C7 i/ M3 ~ D @# c d/ m& h
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- & ^3 |( D" C: @
- function dispose(ctx, state, entity) {% n* M5 W, g" b4 m( F6 {# Z
- print("Dispose");/ }& l: n( z9 A3 F% E6 U" g
- state.running = false;& z! [( D: T1 D0 `
- state.f.close();+ J8 m- ?+ u; q3 H* f. D( I' `
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- ( q- D: C8 y- j2 S
- function setComp(g, value) {5 l4 y/ W/ R: |
- g.setComposite(AlphaComposite.SrcOver.derive(value));
8 B$ D0 M+ z% `2 ]) T6 T) p3 E5 J - }
复制代码 2 J3 U F6 @( b, d6 t3 ^
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。
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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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