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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。/ i# e$ T3 E$ w9 M
- importPackage (java.lang);
5 F' ^3 D% K" z5 W+ C - importPackage (java.awt);
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# k: {* `- r0 V- y- include(Resources.id("mtrsteamloco:library/code/face.js"));( C" j* T! v3 j1 L1 a; j
9 Y* {: i: c# Q- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
4 J% V3 d0 W. s1 H. `2 [
9 L3 A. R: `) p, X8 M7 ]: X- function getW(str, font) {
K: J; r5 j. |4 E* j% `! ? W - let frc = Resources.getFontRenderContext();
' J$ ^- \* I1 d9 _ - bounds = font.getStringBounds(str, frc);
5 s$ F' q8 I! Z - return Math.ceil(bounds.getWidth());. F4 I( _% P# w8 N$ N. u+ Z
- }$ i& s& y9 ?: R
# \* [( K! k2 C) j- da = (g) => {//底图绘制
$ b$ M& `2 Z7 B u- v - g.setColor(Color.BLACK);7 c0 M$ L Z4 f9 C
- g.fillRect(0, 0, 400, 400);
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- * Y0 m$ I" _$ L4 \8 w& ?7 N; l
- db = (g) => {//上层绘制
9 r3 u1 p9 f7 |; D - g.setColor(Color.WHITE);& i* Z: q( {# G& E
- g.fillRect(0, 0, 400, 400);9 H- ^7 r! A% m( J
- g.setColor(Color.RED);
5 W( X- m" b9 a$ f( B - g.setFont(font0);3 K: b2 d( z Z
- let str = "晴纱是男娘";* S. T l* g% j5 [4 e
- let ww = 400;
4 Y3 c) ^% G1 I- ~( {8 [: i- t9 p: | - let w = getW(str, font0);
. o% S+ {) E& {$ I# C% f - g.drawString(str, ww / 2 - w / 2, 200);
/ `- V' U% h4 D+ t/ V9 f6 d - }
7 a9 ?' D$ w) P% }7 |. }/ b
4 ~% X' h3 ^% z8 ]9 v) O( h9 u- const mat = new Matrices();' C6 b/ g5 A2 H; k% `* h5 x3 d+ K
- mat.translate(0, 0.5, 0);2 n9 z; f8 A' X
* L& T* z6 n+ u0 K" J- function create(ctx, state, entity) {/ _) F; L0 Q- C0 J ]
- let info = {
1 E$ T& c( p" x - ctx: ctx,
6 N9 Y9 Y3 V+ Y: [& Z* _& M& Q - isTrain: false,
; S- o5 ], i# S# \$ x7 S- T! b - matrices: [mat],
: |0 i A$ E. ~/ h1 \ - texture: [400, 400],5 M$ K- g# T3 ]% ~ c: B" [
- model: {; h7 e+ ?2 h( M! N$ C6 x" M* |; @
- renderType: "light",/ |& b- a g T) ?8 _% J) x
- size: [1, 1],
a' ]0 r+ T* O0 G1 z. c4 Y1 X& V' V - uvSize: [1, 1]
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- }; O( W3 B; s& S! X* F3 M9 g9 K
- let f = new Face(info);% j4 u* Q8 f5 }2 [3 m2 O, {
- state.f = f;
# t5 y4 k8 b+ ~ L& @ - ; h* P/ |& j9 `+ @; p8 ]
- let t = f.texture;$ ` ^. T; Q9 j: n3 S* U( T f2 J
- let g = t.graphics;( X& G8 A( A$ `0 m- _$ L
- state.running = true;" Z9 z* @5 F2 Z v7 I3 J' S2 l
- let fps = 24;
. h7 z5 N: w' ]9 @% s) c - da(g);//绘制底图/ X% i0 X* Y, [: Z% W
- t.upload();
+ Y# ?9 Z8 A y9 X - let k = 0;
: I& D/ n1 _+ v. n4 o - let ti = Date.now();
0 h2 f: e) W. p2 K0 Z - let rt = 0;) o7 B& C' ]* ~* y& z3 k ^
- smooth = (k, v) => {// 平滑变化: U. u$ Y' P X
- if (v > k) return k;
; ]: L ^( ?% K - if (k < 0) return 0;. d# F6 s2 ~. H( M' i+ j- Y
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
; [. B9 }/ Z8 z0 b+ X0 d3 K - }
2 _# e4 t3 G0 s% u* E9 `6 X, B& Q - run = () => {// 新线程
4 K8 R" D% T. W2 ` - let id = Thread.currentThread().getId();1 a. O& n$ |7 M5 ^
- print("Thread start:" + id); I" Y$ f8 `/ h5 Q
- while (state.running) {7 U# x1 m z" U+ w: }" ^4 Y' \
- try {3 d, o8 D- { J u
- k += (Date.now() - ti) / 1000 * 0.2;# w6 R! n2 @) B7 W5 r
- ti = Date.now();
- H0 v0 L N( w$ T+ O - if (k > 1.5) {3 i0 G: ]7 G* d
- k = 0;6 W6 V6 }" ?, d2 V8 o2 k
- }
9 k1 ^( Y3 [* I" ~4 O9 T - setComp(g, 1);
/ }; r! F% _/ B4 @' E/ d( W4 S - da(g);
, P9 o: [" @9 N - let kk = smooth(1, k);//平滑切换透明度' O* W" o) A9 J& u$ \6 O' ]
- setComp(g, kk);) n% O* s6 I5 l' }9 \+ Q8 y+ p: Q
- db(g);) g& z5 m' \+ S- M; ]! k
- t.upload();
* M U) ~8 |( m1 q% e0 X ^ i - ctx.setDebugInfo("rt" ,Date.now() - ti);6 X) G$ o; C9 J
- ctx.setDebugInfo("k", k);/ H7 p& i' ~2 h8 C: V
- ctx.setDebugInfo("sm", kk);
: X D9 }! X- C" B - rt = Date.now() - ti;" g8 d! k5 K# G6 K3 m3 v9 c
- Thread.sleep(ck(rt - 1000 / fps));( y7 M4 E: l( O+ p
- ctx.setDebugInfo("error", 0)
8 V. M1 E" }. l5 `/ f4 T5 \) R - } catch (e) {: X4 g( K+ N3 E3 V/ F
- ctx.setDebugInfo("error", e);
4 a1 D* K( O6 p' D q& B2 N- ~ - }6 [' d+ S Y4 E5 a7 w3 _2 k' [
- }
$ t$ n# ?/ ?- ^0 x a) L) }/ @ - print("Thread end:" + id);
0 x h& w: |/ D7 H% P% x( c - }
7 U4 x2 e( T( @2 u - let th = new Thread(run, "qiehuan"); p1 H+ u/ Q" {+ ~4 U& q. o# J
- th.start();9 u9 s) j: r6 B$ M) h
- }
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- function render(ctx, state, entity) {
2 z- U4 y! U; _' l - state.f.tick();
6 [/ u7 `: l2 ?( J* H - }
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- function dispose(ctx, state, entity) {+ Y3 V, y! q; K' u k; F
- print("Dispose");
% e; `, U8 q; a - state.running = false;3 ]" r& z7 B7 `/ n+ \5 A! ]0 d
- state.f.close();
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1 O! Q; Q% \) S* O; w r" Y- function setComp(g, value) {
$ B6 Z% H. k- R* }9 X6 T! X - g.setComposite(AlphaComposite.SrcOver.derive(value));4 X; g7 k9 @2 i* a
- }
复制代码
# U, ]' U) p* m/ F, i$ M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)8 u% l6 m$ y' `
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