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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。
5 R6 A8 |; a. i" X9 t% k1 A' L- importPackage (java.lang);
7 O! k3 w) G* y - importPackage (java.awt);0 }' X6 e( N: z9 ]: z8 n; l
7 Y( {: k0 d0 t- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
2 G v' E8 w: E* g: U } a c - let frc = Resources.getFontRenderContext();
9 D' X/ r* W% p* P# t - bounds = font.getStringBounds(str, frc);
8 K& d/ f$ B, ]8 U0 } - return Math.ceil(bounds.getWidth());- Z0 P% J# o; A d) p s
- }
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R: q0 C( }/ g0 U- da = (g) => {//底图绘制+ {7 S- F% m" p/ M
- g.setColor(Color.BLACK);. ~% ^* K2 b7 u' P$ w0 z
- g.fillRect(0, 0, 400, 400);9 o, }$ t/ Y7 U. L h; `; r
- }9 B& k3 N7 c- g( X7 g5 b! X
- . J( p' v2 f1 ?
- db = (g) => {//上层绘制* t X; ]$ |6 B9 c1 C* U1 \: }
- g.setColor(Color.WHITE);
+ y, P9 i1 ]# _ - g.fillRect(0, 0, 400, 400);
- u6 s3 @2 F) s- N: ? - g.setColor(Color.RED);
2 \5 R1 @2 \( d- F% { - g.setFont(font0);
0 r$ r7 G/ F! X& }4 h% @ - let str = "晴纱是男娘";2 o$ b) z! b0 k/ E
- let ww = 400;0 N7 r# x2 S4 }
- let w = getW(str, font0);) j+ ~, F6 m1 C3 J' i l$ x! R. R
- g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();
$ c. j8 @4 a3 y7 b1 Y) B - mat.translate(0, 0.5, 0);# H: Q! D" Z+ i+ M M! k
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- function create(ctx, state, entity) {
$ o2 e& E2 f8 h0 h - let info = {/ K8 ~# C. B+ R( g# l! x$ L
- ctx: ctx,
3 Q0 q1 ]- a* j! a% S - isTrain: false,
+ D U6 r( g& [$ [) v& I& ~ - matrices: [mat],4 L6 M$ n1 P* a8 N0 R/ @* C
- texture: [400, 400],, B' h0 |; C: I. `# i& D& t; h7 C
- model: {. H0 t% q! w0 H; y8 V
- renderType: "light",* }9 y: V \: ?$ Y4 _. w) p& Q# D
- size: [1, 1],* P9 w0 M7 [+ k% w7 V
- uvSize: [1, 1]* `! [' c% r4 Q0 O1 x
- }
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- let f = new Face(info);% g) R9 d& L H7 u& ~
- state.f = f;
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& X+ g9 s1 K1 _5 ?- let t = f.texture;% G" J/ i1 w- Z; m5 U
- let g = t.graphics;; Q/ h6 |6 u) N# }6 ~: v2 h. e
- state.running = true;
% t- t# j7 k9 L4 D - let fps = 24;
8 h$ l4 k- I8 n$ f9 g$ o - da(g);//绘制底图
6 P# @8 m, T$ s8 S( @ - t.upload();
0 J5 G8 Z5 s! x - let k = 0;/ F7 i) s, _# E1 m4 B+ D- x
- let ti = Date.now();+ o# W T/ \* S7 M) _
- let rt = 0;, S# I2 [: B f( D- r
- smooth = (k, v) => {// 平滑变化1 k5 B2 F1 X- A0 L
- if (v > k) return k;* b& D9 z2 a4 n/ a# i8 j, d$ m* D
- if (k < 0) return 0;
( g0 [# n$ M0 J; D# |6 l0 v3 u, V6 e - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
7 l' u' ]6 E* O6 V% a - let id = Thread.currentThread().getId();# }4 ~* t/ W1 p, w3 b) p. R$ ]1 G' e
- print("Thread start:" + id);. a: R. f$ [# ?, _
- while (state.running) {2 A& f0 {$ h: o' H9 z g" L
- try {
7 ^% O& f U8 f' E0 r- f - k += (Date.now() - ti) / 1000 * 0.2;" m- v" J. M1 f; V$ s
- ti = Date.now();
8 [/ c" W }& C d- ^ - if (k > 1.5) {: E& U! H7 {* | B- M" ]1 }6 R: s
- k = 0;
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- setComp(g, 1);6 m, W, }3 i% e0 F
- da(g);
+ ^8 D. x5 c' {# K% j- ^ - let kk = smooth(1, k);//平滑切换透明度0 A9 z- \; u4 I
- setComp(g, kk);
7 e8 V6 O. {$ g$ A - db(g);
' s; v! }2 U) {5 ?+ j - t.upload();5 c- l4 X& S P, [
- ctx.setDebugInfo("rt" ,Date.now() - ti);
! T Z( h# _7 N2 ]# N w - ctx.setDebugInfo("k", k);) F% Q' F( p/ G( u' e) Y' i% g% Z' ?
- ctx.setDebugInfo("sm", kk);9 y( j3 d5 e- l% D+ L# h
- rt = Date.now() - ti;
3 l1 Y, Y5 Q9 k2 r9 t" c. s( ?* W6 o/ N - Thread.sleep(ck(rt - 1000 / fps));
# ^6 `; U7 _# }5 S9 R5 w - ctx.setDebugInfo("error", 0)
s* z. }# Y& r( t* { c5 |; c2 i - } catch (e) {
) ^0 O' e# }9 ^+ x - ctx.setDebugInfo("error", e);% B) y6 Z5 g4 T Y
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- }) i7 S, T# |7 j) x% ]" _
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");1 b1 ]7 b# j3 e% z$ q# T# c3 [
- th.start();1 |' U# K9 x1 ^7 m
- }
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4 u( q% k" N! F3 a- function render(ctx, state, entity) {
{0 |) ?- p. `4 _/ K1 Y; b - state.f.tick();
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( ]9 a& {( t' {5 p: C2 u- function dispose(ctx, state, entity) {
" X$ m. b. Q3 t) e" S6 d$ _ - print("Dispose");
& c, v: E a! S3 d) [+ R - state.running = false;3 b) B r* [( [* N
- state.f.close();
1 Q' C4 p2 o0 S9 {. E b - }
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S$ @5 K0 S5 E( S8 ?- function setComp(g, value) {: Z* t V' w/ q U1 |# C
- g.setComposite(AlphaComposite.SrcOver.derive(value));* P$ V0 T0 A L g9 B
- }
复制代码
9 B7 G8 k ]/ N. b3 ?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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& z: |* g2 Y" ] }9 P; ]7 O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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