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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 n2 d- N( T: K- importPackage (java.lang);
6 Y4 X. q( v# U+ x2 P/ p9 G - importPackage (java.awt);, S: G/ ~$ G7 e3 K. r3 H; f; ~( ]
: j" p% [% y3 \- include(Resources.id("mtrsteamloco:library/code/face.js"));' ?. P, r9 u( i3 ^# O
- * H* V% I. W# y% ]& v5 W9 ^; i4 ^! o
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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( g$ j+ s5 h% W ^ V5 @8 m- X- X- function getW(str, font) {3 S$ ~0 E- n1 r7 m. [" D! q
- let frc = Resources.getFontRenderContext();
5 W* t! _9 d5 C3 G6 `# p - bounds = font.getStringBounds(str, frc);
2 i0 V6 h$ s; M' n - return Math.ceil(bounds.getWidth());
: y# b7 G; N2 ^4 \ - }9 Y) M3 h& g- f
0 M1 u6 t. F9 S9 b4 ?- da = (g) => {//底图绘制
- `4 h/ H2 @: P - g.setColor(Color.BLACK);8 b: V0 U, h3 m, B0 v
- g.fillRect(0, 0, 400, 400);& k) n5 q$ q& e1 i% L# [
- }
% B3 }" w9 d0 } - " c* ]( N, B. U) E2 N6 h! b, I
- db = (g) => {//上层绘制: {+ G8 U7 e! w% t+ k
- g.setColor(Color.WHITE);
4 |% U$ Y8 w! I6 r9 i/ N; z - g.fillRect(0, 0, 400, 400);" Q2 V* o. `/ N& C: S1 a# W
- g.setColor(Color.RED);
* O0 E% E E) V. A Y. e - g.setFont(font0);
1 l" j3 M+ }. Q3 V9 q+ Q - let str = "晴纱是男娘";
b; w4 t! O4 m( h - let ww = 400;
# K! H5 x5 D7 q0 Z+ Y. G0 U" `3 g - let w = getW(str, font0);
2 O/ N `+ L& \: {8 I4 ` - g.drawString(str, ww / 2 - w / 2, 200);- y( X, r2 u: \6 R3 P
- }! s9 V) C# R0 V8 P: j
- 9 c& k; a9 \6 ~5 Z9 W. u
- const mat = new Matrices();
# N0 S3 } V c7 x$ k - mat.translate(0, 0.5, 0);4 d+ l: C- N0 Y* @
- " z7 V/ t& ?2 W7 r1 D) i1 n
- function create(ctx, state, entity) {
: L' Z+ B& A, x8 ]: [: M - let info = {# Y0 Z$ i8 X4 U' B6 N& |; \; j
- ctx: ctx,
$ x% @9 N ^- l8 K, C4 w7 H- M* p - isTrain: false,! I5 `5 _) m3 l+ k1 Q t9 I+ t% k' ]
- matrices: [mat],
) ^' F/ o" Y/ C. D0 O - texture: [400, 400],
9 a1 `; d2 P* R - model: {
, L1 r6 `9 k8 U5 e - renderType: "light",
' U7 j. S5 _$ H7 G - size: [1, 1],
: j- }5 T) K1 J6 ~ - uvSize: [1, 1]
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- }
. v2 I4 Q# i- k1 c. m - let f = new Face(info);. w( F4 A s9 m/ y! p3 g& ~/ V3 @
- state.f = f;
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- let t = f.texture;
1 Q/ N# X; [# q+ O Q - let g = t.graphics;5 D V( f4 k& W
- state.running = true;
& {7 O% j5 n& u) B! c" v - let fps = 24;
# `' x, y& a* n7 M+ z - da(g);//绘制底图
: u+ z' _7 |8 \( y6 \. Q, Q* f - t.upload();. ~8 f! s3 K8 q1 [/ X' u
- let k = 0;1 |8 y3 u2 K! @; f
- let ti = Date.now();
6 Z r: y9 A/ A, _/ K$ K4 t& A! @ - let rt = 0;2 i S- ]( Z }3 ]6 b% }4 T; @
- smooth = (k, v) => {// 平滑变化
6 p% t. {' e% q% ]( M0 Z7 O9 t; Q - if (v > k) return k;
7 T1 q, R: y5 P: T) B( l9 a# Z - if (k < 0) return 0;
2 U# w. i. |/ E% ?4 ^ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;1 @% r& `$ h6 n* Q, P& \6 h% R( \
- }
& l% q9 k4 m+ o" t+ I$ v) h - run = () => {// 新线程
2 m2 H" v m$ ?5 }4 L6 ~ - let id = Thread.currentThread().getId();+ @1 X- h6 w9 N. Y2 x+ k( h
- print("Thread start:" + id);
' l7 ^+ p) B( d6 x) _+ p% v6 L8 c - while (state.running) { u: J9 o ~ ]3 J* \" ^' W, l8 F3 }- w" E
- try {, A, N4 P+ b" ]/ ?# Q
- k += (Date.now() - ti) / 1000 * 0.2;
8 X( n8 ]: d8 M( Y7 p8 X% R6 H0 z - ti = Date.now();/ P3 L7 m G/ y( p/ a
- if (k > 1.5) {
2 ]" U3 E% v% y8 l* W - k = 0;4 h4 I/ f6 P' ~& n* ]* n
- }$ C% |- }& [% S' k6 z: S
- setComp(g, 1);5 `& Y. _" u7 b0 }
- da(g);: O2 R* q' f7 b6 G, `
- let kk = smooth(1, k);//平滑切换透明度5 L% t. @/ `2 _, v9 `7 H
- setComp(g, kk);
2 h- @( N2 B$ F1 ]* N; ] - db(g);% O, Y) i# i* {% f6 b5 C/ V
- t.upload();4 O+ s$ X u- G6 i
- ctx.setDebugInfo("rt" ,Date.now() - ti);
f# j, x; T/ s$ b" ?( p - ctx.setDebugInfo("k", k);* s! G$ ]; R2 e. ?$ N
- ctx.setDebugInfo("sm", kk);
& C6 H( f4 R8 ` ~% V: o - rt = Date.now() - ti;. S# g' i8 m. ~! Z" f
- Thread.sleep(ck(rt - 1000 / fps));
1 W, T& d! Y) J& Y* D4 h' F - ctx.setDebugInfo("error", 0)
3 O: [; K/ W$ G E% C - } catch (e) {
: i) O' Y4 v' H" ~: k - ctx.setDebugInfo("error", e);$ M% I5 z% d. i5 S* W1 d: z* k
- }# N, ~# Y/ Q- E, w
- }. I2 A3 k$ Q* ]% r, j
- print("Thread end:" + id);
I ~# M `9 r+ j0 Q( `" V7 Y - }
' C( E2 ~5 {- _0 U- ^0 z* k$ y - let th = new Thread(run, "qiehuan");
6 S! P; O7 q* ?4 f! v; v v7 ? - th.start();# m) r* J* n* O6 k4 r0 r
- }
7 Z3 r! k r$ R. ~ - ( k! o# Z3 e0 S% {7 M$ P1 K
- function render(ctx, state, entity) {9 C8 B9 U6 @9 X* [
- state.f.tick();! G' e0 ^) S2 c! y5 n2 w
- }
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- function dispose(ctx, state, entity) {; ~8 }' E, u" f; V$ B( d
- print("Dispose");
2 p: i! v$ h6 t9 U3 _$ i" f - state.running = false;( [$ d5 T: I1 Z" s& j
- state.f.close();
& H' c) _8 v5 y - }
: C. W% w$ `4 _& Y
0 u5 J* t. h) F6 h, V- function setComp(g, value) {/ n/ `2 Y3 J+ _
- g.setComposite(AlphaComposite.SrcOver.derive(value));
+ z q, H& _0 B1 i# f' M0 Q% i0 T - }
复制代码 6 {2 N4 D- ~4 `9 {8 D" d6 j# e% N
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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I6 t- i+ V+ |1 @/ X, T) 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)6 p' }4 P6 K! b9 r0 J2 a
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