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. I/ A+ j6 w8 u% h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。
- s, ^' i8 G+ s) f, W* i9 J- importPackage (java.lang);
8 \$ ]( a3 ?! p* u% s3 j - importPackage (java.awt);7 S$ O. @( V$ H. |9 |! M2 { J8 Y
( e7 W' P9 g) y/ i) U* O0 S+ e- include(Resources.id("mtrsteamloco:library/code/face.js"));
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8 ~( M+ B1 G+ @9 N s6 c! _% B- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
+ v2 A" L$ G/ x% S: u' N8 Y7 j1 y - let frc = Resources.getFontRenderContext();* F' I4 U% M- ?! A% W
- bounds = font.getStringBounds(str, frc);
( r8 H- a: d6 T5 n - return Math.ceil(bounds.getWidth());; t! G# c/ @, F* g
- }
9 }7 G4 l8 A# E* A n) I
& s! D a) j: {& G: [$ B) V- da = (g) => {//底图绘制8 Y5 g) {/ r; g8 l
- g.setColor(Color.BLACK);
/ @$ D( l/ u3 L) v7 E2 D M - g.fillRect(0, 0, 400, 400);
$ {0 f8 R1 j' ~$ M - }
' M: m! U# Y; ]+ V
1 M+ C& a4 { Y) [: \. }- db = (g) => {//上层绘制
6 _6 Z2 A4 J$ _4 y$ `/ C9 O - g.setColor(Color.WHITE);
5 B# ~( N1 G8 _9 _" w, j - g.fillRect(0, 0, 400, 400);) C: L) W, t# ]6 [! M
- g.setColor(Color.RED);# w; y' @8 N/ e3 }' [
- g.setFont(font0);4 \, k4 f6 N/ H0 I
- let str = "晴纱是男娘";6 t# `+ I/ N4 H7 y# J
- let ww = 400;! u: _, s) t6 O! i* {
- let w = getW(str, font0);$ z; T2 J& M% x. L% Z
- g.drawString(str, ww / 2 - w / 2, 200);% ?7 p0 |- V Y" }; L: u
- }9 G7 i9 J* U; n7 w: \! c6 J& j
- 8 j, e. o3 E, b$ V" W3 j; x; Q
- const mat = new Matrices();
; Y: u; x# z5 i2 R - mat.translate(0, 0.5, 0);$ ^% [: [, F* j9 Z( r5 b. z$ l
* X6 G* Y/ q6 p( v' s* w2 o- function create(ctx, state, entity) {
: h$ m* w4 ]. S7 ]$ X* ]& D) _- n7 F - let info = {+ ^% o ^6 U0 J0 p
- ctx: ctx,# x7 l; T/ b2 ~' v- H) b
- isTrain: false,
A. ^ b" j1 p/ k5 N5 I/ |+ F) q - matrices: [mat],8 v; h' n4 p1 d2 g5 {+ s: U
- texture: [400, 400],% r5 C0 Z" R5 k( M8 W
- model: {$ Z: O- N5 \7 V( w8 z4 b. ?: b0 e0 z4 o; _
- renderType: "light",
9 ~& N" w0 }' ^& ^% i% T/ U - size: [1, 1],
( A( |6 Z4 T# Z* |( S: m - uvSize: [1, 1]
$ b8 `- r. |7 k' [$ v* ` - }
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- let f = new Face(info);" ^/ W' U/ h! J k5 y- V
- state.f = f;: i# H0 F! i% D4 j' q; v1 B/ S. H9 X
- 9 Y3 i5 Q; e( k- _- A5 J4 \$ h
- let t = f.texture;$ n' B8 N/ f) W/ h
- let g = t.graphics;; s/ T: {8 Z. b1 h+ P
- state.running = true;
- w m, K- K- `" b - let fps = 24;
; N0 A ^4 U6 y - da(g);//绘制底图
+ q/ N5 a4 ~' v! ]9 M4 D - t.upload();
2 l. x- ?, t0 K1 [- h; Z% Z0 E - let k = 0;
" b; ^4 U% d7 h/ x4 `% C6 d) I - let ti = Date.now();
! X) }7 z4 d; Z3 A( h2 b4 U - let rt = 0;8 y% x! x' _5 t2 P4 ^- c
- smooth = (k, v) => {// 平滑变化
: U6 p5 t# H; h: t& N) @3 L+ _# `( B - if (v > k) return k;4 a( c2 o a) {' R Z' b
- if (k < 0) return 0;1 a6 |2 ^' P: u7 A& I' n$ m+ T
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 ~. p% H- Y9 [9 {9 _: F - }
2 Y9 U" N8 Z2 @" b6 @. C! V: A - run = () => {// 新线程1 b4 o9 [- f+ E: N. H6 t Z5 `
- let id = Thread.currentThread().getId();* ^7 G% I# Q2 ~4 J4 u
- print("Thread start:" + id);9 p H' E y; J F* T
- while (state.running) {( v1 B* Y$ I* l; |% A2 W
- try {$ ~+ K: h2 a9 P6 _+ w$ m2 V
- k += (Date.now() - ti) / 1000 * 0.2;
5 X9 { X& M& u# ~& s. v5 N - ti = Date.now();% ^4 H! `( H1 E/ F" I
- if (k > 1.5) {
& M7 E- G! ]1 Y5 t8 C3 p+ P - k = 0;
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- setComp(g, 1);
/ d5 q& w4 V# x - da(g); M: J' N2 X: f0 \+ f
- let kk = smooth(1, k);//平滑切换透明度
( l% m9 e0 T% ~! w' T5 x, n5 k* t - setComp(g, kk);7 Q: @) K4 V' R
- db(g);
5 `0 [# ]$ G# r2 H& e R - t.upload();- _1 S0 C/ Q8 Y3 X
- ctx.setDebugInfo("rt" ,Date.now() - ti);
. F- U3 }( X# B) y. h6 e - ctx.setDebugInfo("k", k);# A' g, I6 z) z) Y9 B3 Z+ F
- ctx.setDebugInfo("sm", kk);9 i! M: X2 L( @9 E
- rt = Date.now() - ti;
8 T; e% j: A# i2 } - Thread.sleep(ck(rt - 1000 / fps));0 c2 _4 G. y! ]" ?$ o
- ctx.setDebugInfo("error", 0)
! ?+ T& a" e j6 S9 n3 u - } catch (e) {
4 l( ?& U! [+ b+ j4 V - ctx.setDebugInfo("error", e);" l3 A9 o! ^. c6 J. P# V
- }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
1 }8 S" p/ R4 `. h - th.start();
6 A/ s+ b T' q3 s' j3 Q - }
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- function render(ctx, state, entity) {
# B7 O. y3 S: B) u' I - state.f.tick();0 R% `7 K* u, ~) F( P- K( {/ ^
- }- a- r. d2 F4 n. N9 |6 ^! `: G+ ]
1 {) a7 A$ ?2 y, E+ ]& S D- function dispose(ctx, state, entity) {
% B }# C. J1 [ \1 P - print("Dispose");3 D3 q. u, [9 X
- state.running = false;
5 _! r: X( t3 I7 p/ u - state.f.close();7 n& u2 x7 I0 |" [: [% S+ y7 [
- }
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- X" { n* w/ j+ Z. v- w: V- function setComp(g, value) {
- w& R/ c4 r6 |; S8 P - g.setComposite(AlphaComposite.SrcOver.derive(value));8 c0 P) w% e9 n* l' v5 B
- }
复制代码
. [& K, R) x8 h' }1 \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。( o3 J6 a3 h$ X
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% w/ ?# g* ^/ `2 f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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