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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。
" \' L! d7 i% C: I3 i, I3 [ E- importPackage (java.lang);3 k1 y9 \% d$ U' b ~# u. D5 q
- importPackage (java.awt);, u# ~ |# \4 T% Y
- ) E) N) w! h5 @, V5 S# k
- include(Resources.id("mtrsteamloco:library/code/face.js"));7 q, b9 H: S- t8 n; D3 p1 v2 P8 ~
/ @1 \. H* d5 X- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
8 S$ e9 U# @( t% O7 t- T$ [ - 9 V7 i8 m% G" O2 I: ^( I- @
- function getW(str, font) {* A/ ?( P5 g% ]. U- m. J+ G4 ^
- let frc = Resources.getFontRenderContext();5 K7 j, E e, V4 E& ^
- bounds = font.getStringBounds(str, frc);. c6 u- u. O0 U6 \' D
- return Math.ceil(bounds.getWidth());1 P9 M! P) W9 }; L
- }- T, L. L. G$ j& Q8 `5 D
- # }# P# E$ V4 g" Y3 c9 c b$ i
- da = (g) => {//底图绘制
. [; @+ ?& `* a# Q; f7 M - g.setColor(Color.BLACK);
8 f) n1 A$ W" j2 F - g.fillRect(0, 0, 400, 400);0 j6 H, N' o. M% |
- }
, L8 j* g" i% h3 A1 B - H! j4 E$ m% B5 [
- db = (g) => {//上层绘制# ]" |5 z' ~/ G$ o
- g.setColor(Color.WHITE);4 c: m! \! k, z! C/ B; I3 E
- g.fillRect(0, 0, 400, 400);9 i! m" z4 d2 `
- g.setColor(Color.RED);4 N& e, d7 c7 S" Y& o) u
- g.setFont(font0);) s7 d1 X, e8 X; Y
- let str = "晴纱是男娘";# X7 R, E0 a! X+ Q' f3 x
- let ww = 400;; z: Z+ z8 v& w, ~+ u) X
- let w = getW(str, font0);
- C: q0 s' q% L% r6 K8 b" b - g.drawString(str, ww / 2 - w / 2, 200);
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, X8 [. X+ i$ ^) |* Z) Z- const mat = new Matrices(); T7 q+ a- _9 l2 b+ O& h5 j1 ]
- mat.translate(0, 0.5, 0);
. {8 o8 s1 D% ~! r
4 O g7 e) h* j5 |. u0 H- function create(ctx, state, entity) {
! I, {. f5 k; H- I- d% j - let info = { x6 Q; T3 t. q# x6 Q# v
- ctx: ctx,
0 h; D& R. q. [% g$ D - isTrain: false,
G& c) k) ]4 |9 y - matrices: [mat],, [& L7 b+ @# a, h, ~& v1 y5 Q; ^
- texture: [400, 400],
* W$ N! r& R7 M9 w9 a - model: {* D, @2 h, F, d/ s( n. ?$ m1 R
- renderType: "light",# G* a6 ~, Q: i2 d
- size: [1, 1],) }7 J6 v w' R$ ?& J& ~; D
- uvSize: [1, 1]
% b, F* ^9 Y3 B9 q6 F1 w# l7 d( [' j - }
1 e5 a8 ^5 g9 J T. ?# N. w - }
4 b% a* t" I% q- ?# B2 [& m - let f = new Face(info);
; g: z1 y9 B1 R$ l4 D - state.f = f;% r* e% k1 ]: W. `" U2 Z" Q' Y
- # \! V% Z2 x5 X I6 j: e. _
- let t = f.texture;7 T @2 l; G9 K: B# R* C
- let g = t.graphics;$ w- o, t, W7 _, v; C3 x: k
- state.running = true;8 [8 z8 A& j5 Q* ^
- let fps = 24;, _1 `) Z+ [! G ~9 g3 Z: |* G
- da(g);//绘制底图( J# _9 } h; C( K! s
- t.upload();! b" D e }2 F7 s. c
- let k = 0;8 h* W% F. E* O9 G# V$ r" N# E
- let ti = Date.now();# J5 g; t; n+ N8 ?* Y" ~8 Q$ u( p
- let rt = 0;
/ d0 N" m9 R; `9 ]& v# f - smooth = (k, v) => {// 平滑变化
7 H/ t) ?0 y; W* D. f; B2 x - if (v > k) return k;( D" N5 f+ U! N3 h
- if (k < 0) return 0;
' V% @5 |; {+ ^( [/ x - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;! f# }1 a3 m: @8 c( i! e, n
- }
- L* B" _; O2 T/ N s" @1 O4 o - run = () => {// 新线程1 q" s1 c! G0 p/ d8 ]1 ]5 q
- let id = Thread.currentThread().getId();
5 [/ s2 X! J# a$ n+ H& D - print("Thread start:" + id);2 H7 W1 }5 W. A, t! Q; Q
- while (state.running) {
# e# p/ p3 u' I* {- {3 w+ o2 |+ V$ _ - try {7 v, k- k* f3 |9 r+ p0 w& h
- k += (Date.now() - ti) / 1000 * 0.2;; D) n# d" k+ T! D$ d2 @
- ti = Date.now();! @8 x4 A( v9 p0 \7 m
- if (k > 1.5) {0 p! d3 e6 m2 }( E
- k = 0;
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- setComp(g, 1);( D7 W$ q/ Y8 |$ C F
- da(g);
7 {0 v2 _( U5 i1 W - let kk = smooth(1, k);//平滑切换透明度- Q7 d- b& \& i. R
- setComp(g, kk);2 v( B3 P) d1 @) C1 Z, `
- db(g);
" ^* d. {6 `" s' ` - t.upload();
' C- R1 A# `2 \, Q8 m) e. o/ _1 n - ctx.setDebugInfo("rt" ,Date.now() - ti);
5 N7 q0 ?1 h4 {' ]/ F - ctx.setDebugInfo("k", k);& s/ X7 y1 K" [
- ctx.setDebugInfo("sm", kk);
8 L& w& t7 \+ t! }6 R5 O+ l - rt = Date.now() - ti;
- }" J4 |+ H& v - Thread.sleep(ck(rt - 1000 / fps));
3 c. i# |$ Y+ D. [) n - ctx.setDebugInfo("error", 0)2 }4 N5 G" L& D E+ i% q
- } catch (e) {+ r- Y) W" ~5 V P
- ctx.setDebugInfo("error", e);
- D0 x3 H- B Z' a8 Y" t. C - }6 F; C# O% ~& d1 Z T; ]3 F# I
- }9 A( h; s, s# n. U) d( u
- print("Thread end:" + id);) j0 f8 `" h4 }: {: v K$ C
- }
) c" _& H; p1 _$ L2 d - let th = new Thread(run, "qiehuan");8 x0 @0 d; r" f0 l) [
- th.start();* }+ O- n v3 W0 X" s$ K1 }
- }
; W( F% t: h7 y h: H
7 K+ J7 I) \6 d. \0 [- function render(ctx, state, entity) {! S( M7 ~3 J; a8 s$ n
- state.f.tick();
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- ! A" W: F9 `/ c' w
- function dispose(ctx, state, entity) {) P9 Y4 C8 L! T3 X$ A3 f
- print("Dispose");
) A* F7 n/ N0 Y: {4 D/ N0 m - state.running = false;
x2 V- U8 A: r6 \; Y* Q" s - state.f.close();0 c/ m7 w* ]3 k' B0 O6 m
- }
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- function setComp(g, value) {0 r) I- W; a& e# t1 T3 g
- g.setComposite(AlphaComposite.SrcOver.derive(value));9 ^. a5 D; l- z4 o) V0 C3 l% L2 y
- }
复制代码
4 n5 y3 k/ I k% t4 i" W7 H' c/ O. 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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+ X) b3 u1 E v1 V( D顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)' p3 Z5 K- A7 d& E( k. s
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