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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。
7 {0 V, `1 U3 K+ D- importPackage (java.lang);( F, g! b- ?& M# M
- importPackage (java.awt);2 h2 Q+ i' Q, w0 P! }6 K& P H
% S4 F, T: B7 e5 ? E7 F- include(Resources.id("mtrsteamloco:library/code/face.js"));; e, p. F/ a2 L! l/ G
. E' U1 @1 L6 l) G0 v+ k- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
% O: x2 e! z0 B( @ - $ v, } L# v: `
- function getW(str, font) {
4 P# n' A# T" Z# Z - let frc = Resources.getFontRenderContext();
$ [9 |& ~9 n) A; p! c2 K+ P - bounds = font.getStringBounds(str, frc);; ^ D' ]) S( w) O- B! |- E
- return Math.ceil(bounds.getWidth());
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- # Q+ y6 c, k1 n* b6 P
- da = (g) => {//底图绘制# m$ X, |6 E& d3 P
- g.setColor(Color.BLACK);4 T1 Y8 J0 D5 U3 Y# I' g2 ]1 \
- g.fillRect(0, 0, 400, 400);
3 X; o9 d$ w' s+ H) f+ H% R - }
% I0 I7 F9 c. ?4 _5 O: r - 4 _3 m4 \2 b: Y
- db = (g) => {//上层绘制: e" m3 x4 ?+ u
- g.setColor(Color.WHITE);0 G' R7 |: x, Z6 \( V9 z: q
- g.fillRect(0, 0, 400, 400);
8 H- [/ Z$ ]- @0 n, \6 O - g.setColor(Color.RED);3 ?/ T6 m8 f: a# M: u& B+ u0 v
- g.setFont(font0);
+ ~) B. }) l- z1 L5 d+ E; Z" Q - let str = "晴纱是男娘";. ~: h# @4 }) ?
- let ww = 400;
( B. V( e+ E/ \5 H - let w = getW(str, font0);
& ~1 g4 j# T% }6 H% I* _7 V - g.drawString(str, ww / 2 - w / 2, 200);( p4 [% h. L3 ^9 F b" J
- }5 e; K# N! m7 y6 q4 z7 c% j, ?
- 2 I: r; g- F+ z
- const mat = new Matrices();
' w9 w/ c2 ~5 n# e - mat.translate(0, 0.5, 0);$ `3 ?) f: i" M4 f0 |; j0 b
- ! p7 \( P6 O; S$ t% U
- function create(ctx, state, entity) {
, U; z# T* P/ a1 {1 {( { - let info = {
^" s+ K( a2 [ - ctx: ctx,7 }& g/ ^: r% |4 V$ W$ d
- isTrain: false,) B) }. m- l; G! d
- matrices: [mat],
' u- E0 I b1 W - texture: [400, 400],7 G; _3 p* v% d2 ]1 k" F. ?) c; h1 c- @
- model: {# `6 V$ y) B0 Y" i9 o3 |
- renderType: "light",
( }& ]2 F2 j% \6 M7 m6 n f - size: [1, 1],
. D8 `& l% R& h9 x- T - uvSize: [1, 1]% o1 ]8 a+ g. O
- }! e9 Z* [ x v. g& o0 m: E# c
- }& L/ K' q1 I* D5 T
- let f = new Face(info);
' K/ F+ H: d% N0 q7 T& d - state.f = f;
' P& `1 A- k1 {$ U
5 |2 c4 G0 ^ Y% s, |0 G# ^! x& X- let t = f.texture;4 ^# W' b/ s! R) h% _' h, h8 u- P3 I( Y E/ P
- let g = t.graphics;& Z8 k4 u. h1 K1 q0 Z
- state.running = true;, o" h3 D7 w3 b. D. `8 G' K
- let fps = 24;# V, ]9 q, p1 e `, z. u5 }0 u
- da(g);//绘制底图( N3 d6 A6 d r+ }4 l } H
- t.upload();0 q# a5 d: }; W( T6 @+ R
- let k = 0;: Z- t3 Q2 u5 N w+ T
- let ti = Date.now();1 K% R5 ^- g9 l5 Y
- let rt = 0;
' @+ x, p2 Y, v X2 c - smooth = (k, v) => {// 平滑变化
& [, m5 {/ g% ^! G) D& t" u( A& O - if (v > k) return k;1 I& M( }2 t' L
- if (k < 0) return 0;# U8 p t' \1 O. b$ z' o4 o
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;2 H& y' c W) x0 D! l
- }
6 P1 {' L2 g( B* I- J Z) a7 k - run = () => {// 新线程1 N% i4 P- p; t$ M" T
- let id = Thread.currentThread().getId();
! T. | q* E6 P% s s: V7 e! ~9 b0 E - print("Thread start:" + id);6 c, P( O) d9 _5 |/ C
- while (state.running) {
* f5 M4 [' a. P) j+ ~, T - try {8 X) W6 v( ?& c, ?9 Y J5 L
- k += (Date.now() - ti) / 1000 * 0.2;+ f: J3 g) I9 G
- ti = Date.now();
1 i& g. g4 Z' B3 O) L5 w - if (k > 1.5) {
- l' [: W: m' j - k = 0;
$ t; q4 a% p( @* G' C - }/ J) D, p" k! I
- setComp(g, 1);
: C/ L, [1 j9 P2 \, I - da(g);
: K ~3 P3 N7 @$ f: z - let kk = smooth(1, k);//平滑切换透明度! @* U" u8 K5 E7 d0 c8 U% z. e: ]$ C
- setComp(g, kk);1 M; z9 h) V3 k/ r( @' |6 h
- db(g);' k9 H" Y3 x6 k& R' ?5 ]
- t.upload();
) H4 f( A- i8 E4 B5 ? - ctx.setDebugInfo("rt" ,Date.now() - ti);
; q7 m4 M" V: E M% B - ctx.setDebugInfo("k", k);
+ X9 h( I+ g9 @: {1 l/ b, d - ctx.setDebugInfo("sm", kk);1 R" ]7 W' P: I7 H- _
- rt = Date.now() - ti;
- w* ~( d6 t6 ] n - Thread.sleep(ck(rt - 1000 / fps));
% f- F5 ]7 H8 j. T - ctx.setDebugInfo("error", 0)
* y; z6 G: t( m - } catch (e) {
) L' r* \3 c7 ]$ G9 Q, G - ctx.setDebugInfo("error", e);/ d, \6 Z) R% W( j! r% I) h4 f
- }
! g& U! j( w6 X+ ~/ I: R - }
! _$ |3 {6 k5 n4 P% A+ P4 m7 ~ - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");; f1 L9 P! l W) i
- th.start();+ V7 u6 v; Z/ p2 G
- }
% {" H$ N( U0 x4 w
/ }6 g( a9 }( ?. `- function render(ctx, state, entity) {# V" O5 X" r6 ?4 h5 U ^
- state.f.tick();8 I% g1 e2 {3 W$ s
- }% H. P, ?9 |' {4 d
- . K& ?6 F3 w3 H- b7 b; ~
- function dispose(ctx, state, entity) {/ V" V6 D! q: @
- print("Dispose");- S! ^) l9 k, w- @" x
- state.running = false;8 z- I' z6 K" P3 v6 v
- state.f.close();* i7 {0 Z9 b9 o) T0 v
- }- T. C) h/ s* A
- ' g( C$ P. [3 t- ]# N1 s; V
- function setComp(g, value) {
1 E# f9 k4 m, P+ L; B5 G - g.setComposite(AlphaComposite.SrcOver.derive(value));
' c8 f2 V) G5 [9 h, h - }
复制代码 , e% O# T$ k# x1 A: m- K
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。; a+ }# s& Q4 J. [7 Z
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6 {, I4 p# v3 i n1 }* `5 I+ s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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