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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。' G: r5 @; b0 U' p9 z
- importPackage (java.lang);
9 w9 M% J1 s* o, e+ C; | - importPackage (java.awt);3 U. T9 `; E- W$ A
( _2 ~! e0 x+ N: b- K- include(Resources.id("mtrsteamloco:library/code/face.js"));
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2 `+ F8 k! H" n1 x3 M* m, l2 N- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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6 I& ?& A) u1 `7 P3 |- function getW(str, font) {% V8 M9 C3 X0 U1 g
- let frc = Resources.getFontRenderContext();" i1 p" F7 |- w# _" J
- bounds = font.getStringBounds(str, frc);* ? x: i% [, q( P5 ~/ _
- return Math.ceil(bounds.getWidth());( S( D M5 [0 j1 x! g' m5 ^
- }4 t& I9 f' v' W( i3 F4 q
7 z5 }& V+ j/ ] E' C6 S/ p- da = (g) => {//底图绘制
- Y" ?* @$ e% D! K2 e. f% o - g.setColor(Color.BLACK);: z) \4 A; W9 X0 t: l. I
- g.fillRect(0, 0, 400, 400);' L! a, x& i; s! O9 |) S
- }9 y+ D6 d% u; D; W- i9 c
& g" o( d3 d* X4 P+ V+ A8 K- db = (g) => {//上层绘制; @! J$ x! v. k" p3 X
- g.setColor(Color.WHITE);* ^8 W* f5 O+ x* y
- g.fillRect(0, 0, 400, 400);
7 W- A- u2 r" g4 f - g.setColor(Color.RED);
, n# Y% ]* g9 @2 E, E7 ` - g.setFont(font0);$ u, D0 P- R* o0 `$ g. `
- let str = "晴纱是男娘";
e& @. p! p: ?% z# ^7 D - let ww = 400;
) r/ b& F. E5 r - let w = getW(str, font0);) x9 m+ [3 L! r( N
- g.drawString(str, ww / 2 - w / 2, 200);
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- 9 |& t7 Q/ O9 Q
- const mat = new Matrices();; y/ c% M* }2 n$ g' ~% ?
- mat.translate(0, 0.5, 0);: k! F) e t3 X j; A
- 4 ^3 W- a. U/ n" T- l/ b4 `& C3 Q' i! y
- function create(ctx, state, entity) {
4 N+ z& X- f6 A - let info = {
% X, A/ b- r& n- L, B7 U - ctx: ctx,
! v& f8 T' q- B) E. s - isTrain: false,1 ]5 F/ q. _) B9 @/ ^" m5 O( E/ P
- matrices: [mat],
, K+ p7 x$ x' f; W" S7 y - texture: [400, 400],& u7 [; ~# O! C# g& ~2 K: a
- model: {
& N9 v" `2 U4 ^ - renderType: "light",
; _) G6 C3 }9 o0 M0 }3 Z* z - size: [1, 1],. r' \( Q! m" ~2 m
- uvSize: [1, 1]
" ~2 ]2 d3 o( i/ l- M: y2 H! Q0 I - }
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- let f = new Face(info);
: A1 W3 O9 h) t( j: R9 B4 j) f - state.f = f;
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- let t = f.texture;
C; i3 A& [9 G" N& ?- { y- X - let g = t.graphics;
. d' Y' G! r5 F; d, P - state.running = true;' x9 Y- A& \% S' J* }
- let fps = 24;
2 K/ V' r7 ?' I% x - da(g);//绘制底图
! A! T, _8 s3 t, ` - t.upload();- C: O) n* X* {
- let k = 0;
1 L& j( w" p' v( {+ F' ~ - let ti = Date.now();" u, b) q* G1 [7 p8 `1 |: z
- let rt = 0;/ z. K& o9 W# W1 h4 n$ a
- smooth = (k, v) => {// 平滑变化2 S: I( i' e" Q. s' N* L& F
- if (v > k) return k;
7 w6 S, x: w4 N6 }! V1 }; G - if (k < 0) return 0;, O& ?& j$ g _$ L
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;8 h( E& [$ D( o% U2 }
- }
4 n0 r7 ]4 x: T- L S: m - run = () => {// 新线程
. c3 B2 ^' x" J4 R% A- Z7 @ - let id = Thread.currentThread().getId();
4 Q) w5 k; O2 d, [9 B6 c2 r - print("Thread start:" + id);
7 [0 v2 C2 M. A; N; ^ - while (state.running) {* A/ @3 c0 G, B# B) {: U6 ` L
- try {1 n% a8 Z6 g! T1 q9 `
- k += (Date.now() - ti) / 1000 * 0.2;' S. m T9 d: N# B4 C
- ti = Date.now();# B, {5 b: g* O4 T
- if (k > 1.5) {
4 \; R; v' z) S0 p! Z) v1 K: F - k = 0;5 I- P/ y3 Y; U+ s) g5 B1 j2 g
- }
6 i4 ~1 n4 ^- x8 k9 l, X - setComp(g, 1);
3 `# I) T9 S( F1 Y' X - da(g);6 n6 ]9 v1 q/ ?7 J, [
- let kk = smooth(1, k);//平滑切换透明度
/ t) d2 x4 Y# m5 U% H- \ - setComp(g, kk);
/ i) I; u: |) @ - db(g);$ x& s U: e" W0 c+ B( O' F
- t.upload();
6 r, o4 L3 G* { ~$ M - ctx.setDebugInfo("rt" ,Date.now() - ti);- m3 B/ n# S/ \
- ctx.setDebugInfo("k", k);
1 u: r' k8 `/ `- s" F6 z7 U* M - ctx.setDebugInfo("sm", kk);
' g7 f; ?* l* }6 g3 R3 y - rt = Date.now() - ti;- @: G1 z0 C/ _( q* i! P
- Thread.sleep(ck(rt - 1000 / fps));
1 `. T; X+ ~, Q5 U, d/ v - ctx.setDebugInfo("error", 0)0 j+ u+ K2 o' d' C3 T5 w
- } catch (e) {7 ^- e, W2 @* |+ |
- ctx.setDebugInfo("error", e);
+ r) Q7 J; j7 z J7 F ~* i3 A' u - }
3 J* s+ `- k f) v' q3 X - }
: [7 q4 k/ }* j t- m4 X - print("Thread end:" + id);" g4 z# d! B2 L; K* L( M: F
- }
' H; K( b+ ^# ^+ c - let th = new Thread(run, "qiehuan");; o2 R2 X V2 b8 V3 e
- th.start();; _' p" u- t& i; y' e- P: k0 }
- }/ q: ^/ C- f1 {7 x) ]
- % ~, x& g4 l% Z' h% I
- function render(ctx, state, entity) {+ ]2 ?6 L6 J" ~- {5 [5 E8 [( L; Z* u. k
- state.f.tick();. O7 Q( [# d- V$ Z9 f
- }
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- function dispose(ctx, state, entity) {
& C- s, b6 ^! w- n - print("Dispose");$ y% V! f/ M. O- k
- state.running = false;2 B" c# [9 N4 e& i' f
- state.f.close();# @1 q1 w+ S1 |+ J( Y
- }
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- function setComp(g, value) {; H1 B+ n4 C0 x' i; X" x
- g.setComposite(AlphaComposite.SrcOver.derive(value));/ z/ w1 I" R v4 u& ^
- }
复制代码
9 [6 q& T! w+ E" Y2 ? S7 D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。# H0 |) X" S( y4 A0 \1 O% ^9 T
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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)2 L+ G8 K% R8 z/ f4 g: l, @
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