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& L2 W. c9 m k& b# L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。
) d. N6 c/ Z- J" \* q- importPackage (java.lang);( g6 F$ `% N- q! V4 {, w( _ ^' y
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);7 [6 ^" r3 I* S( `( |& K' d4 R$ n
% P' t0 R9 b, T. i; R2 T- function getW(str, font) {
; L) a- e* u M7 N - let frc = Resources.getFontRenderContext(); \. U$ b$ n. P# r+ \
- bounds = font.getStringBounds(str, frc);
4 P8 I* [* N# B4 i1 V6 ` - return Math.ceil(bounds.getWidth());5 H" p+ X& K B# }- D* O% `* ~5 o
- }5 x( Y6 _' D, ^6 o, K) A
- . u. U7 [/ p0 d
- da = (g) => {//底图绘制
M b& B8 K! c! m/ r* {* g - g.setColor(Color.BLACK);) E9 k ~# e+ N& w `- Q6 z
- g.fillRect(0, 0, 400, 400);. B; J0 J( X+ G K) g$ |
- }# C' v3 w& ]. I. m
0 G0 h& E$ e& u( [- db = (g) => {//上层绘制& ]( m! ?1 v* t6 V( Y
- g.setColor(Color.WHITE);
/ t. g+ C- R/ F/ B. B$ r. G - g.fillRect(0, 0, 400, 400);
R; [& j2 B7 [2 ~& \ - g.setColor(Color.RED); k E2 Y+ M- q2 s7 e/ K s* a
- g.setFont(font0);
$ |/ |$ i7 e9 }! e - let str = "晴纱是男娘";3 C. t( ^) X7 P# u- A
- let ww = 400;( @; ?) ^5 O- U4 V7 J: o( g! P# b
- let w = getW(str, font0);
0 Q8 e7 d6 A: E1 I" q' f1 B+ O* V - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices(); [# J; t, D( q" w' w
- mat.translate(0, 0.5, 0);( W w1 {* M3 x. s8 @+ g
! j# R3 x4 a( c; e- function create(ctx, state, entity) {
0 w. i7 y! f2 Q( o+ N8 J4 u2 a) q - let info = {9 `' s+ `+ U2 \8 _2 g/ L: x1 I
- ctx: ctx,
: B$ s% B4 P* L" x - isTrain: false,6 h% i3 e% d. `6 a3 g' D
- matrices: [mat],8 x9 |3 a; B7 w- I! P( ]
- texture: [400, 400],
3 Z2 m& q/ @; G - model: {$ n* U1 x, B2 `5 a" z
- renderType: "light",
+ o- W: e5 \. n9 s0 V9 i9 h - size: [1, 1]," w; n4 P2 L! j9 g- T$ |5 B& [8 a* b
- uvSize: [1, 1]
! K/ n- M4 c; s1 n - }
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- let f = new Face(info);
/ Z$ Z2 E: s1 o1 }9 R- j* u- r - state.f = f;/ q/ W6 }4 p8 t6 P
- ) R% j5 t) G& D8 m; F( l) h: H$ j& Z
- let t = f.texture;6 U2 r; v! i. q. Q9 Y8 X
- let g = t.graphics;
6 u. J% T! h( P" y5 |& R - state.running = true;. c0 d. n, ?# b
- let fps = 24;5 G2 G1 U, }: W. _3 C
- da(g);//绘制底图
5 p6 z4 {1 }) W! N8 p( j8 \3 p - t.upload();
v2 e6 x D7 E6 |5 O6 G - let k = 0;2 X" B5 n8 _" a0 r; n: h& i
- let ti = Date.now();6 N* d: @; Y$ g) G, d& r! ~* u' A
- let rt = 0;
# M0 h+ T1 h; L - smooth = (k, v) => {// 平滑变化
# ?0 g# I7 u; \! s N8 b/ g/ H - if (v > k) return k;: d/ d5 U2 S2 a( f
- if (k < 0) return 0;
$ D( A, o; e' ^ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;- a4 J+ C) c+ y, O: D
- }" v9 r1 r V. |2 J& [
- run = () => {// 新线程2 U/ V. Q4 f9 a
- let id = Thread.currentThread().getId();+ G% g g- T6 |
- print("Thread start:" + id);" ~2 `7 U1 N$ c7 e
- while (state.running) {* f4 x5 c+ w1 T) o* |- `
- try {6 w9 J# Q- I6 D( V; b/ n4 ~! t1 U
- k += (Date.now() - ti) / 1000 * 0.2;' c, ?* [/ t( \
- ti = Date.now();
: D" ~" p$ d9 _7 Z% { - if (k > 1.5) {& T2 }- F. X7 l8 x
- k = 0;( {2 i: E4 t4 T
- }
& ~8 k v$ z- | - setComp(g, 1);; m/ S# f+ P0 F' U- m
- da(g);
% G4 I1 g# \- Q/ K4 J% B - let kk = smooth(1, k);//平滑切换透明度
4 \" D6 p- G a+ H) o - setComp(g, kk);
6 r8 E7 P% ?1 @- I8 H - db(g);
# f- |' I' d3 p# M2 N - t.upload();
% y& W9 m2 Q+ E1 f; u - ctx.setDebugInfo("rt" ,Date.now() - ti);5 y, ?5 T) i$ z, S( v0 ~# ]
- ctx.setDebugInfo("k", k);
' V4 O7 k \& n7 a - ctx.setDebugInfo("sm", kk);6 \; P/ o" U( M* b3 B* z
- rt = Date.now() - ti;
7 p! K2 G5 x7 l9 { - Thread.sleep(ck(rt - 1000 / fps));
4 \! P+ h" I! k! V* V - ctx.setDebugInfo("error", 0)
9 O8 S$ Y' J) l, h - } catch (e) {
5 m( P: y' a- u& U: v/ j/ ? - ctx.setDebugInfo("error", e);4 Y6 K8 b. N( h6 ]1 H* i; \
- }
- U. T9 D% c+ A$ v1 G n - }
8 e1 o+ _5 K/ s. [" k/ h - print("Thread end:" + id);* o& ]7 K) O( [3 G( L
- }
, w2 Z2 S* x' [7 s" { - let th = new Thread(run, "qiehuan");
7 a; z0 z, P0 U - th.start();5 M+ q# u* X B: c, \) T5 F
- }
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7 x( n3 w4 E( Z2 f9 |9 q1 Z1 e- function render(ctx, state, entity) {+ |: W6 r& P# u# D$ _ C1 j8 f
- state.f.tick();# }* D) W i9 U+ J6 Y
- }' K5 d7 M; u: c' k1 E4 T3 i( w# P: {6 [
" N5 _6 e E) ?5 k+ D2 A0 h7 |- function dispose(ctx, state, entity) {
$ Q+ [, m2 ^1 P! J! o - print("Dispose");
; p$ L% ~- W5 m7 Q4 \) F$ w - state.running = false;
2 t; Z# O" K+ L+ ] - state.f.close();& u2 f/ O& X x8 q t9 c( }
- }, }; j& m. D7 c$ b6 z
- / H5 K& U2 O% N3 Q/ v: b' U' H& _
- function setComp(g, value) {, \' R& v" x, B* k
- g.setComposite(AlphaComposite.SrcOver.derive(value));
# @& F% b$ C' z8 L Y - }
复制代码 " S" c8 y5 s; x6 t ~
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)
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