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3 k7 h/ @, V2 Q+ S; L+ f8 B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。: `7 d) p8 H0 e v' z8 x- U5 `
- importPackage (java.lang);
' m6 k3 @" [8 l1 L - importPackage (java.awt);* T# ]! v2 X8 Q: I
. W+ V7 l/ }# a' s# n7 c- a, E9 F- include(Resources.id("mtrsteamloco:library/code/face.js"));
, p- L" ^$ {: p, }" T - $ E4 w' i" Q, P0 h0 [8 }
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
2 @3 y5 r8 j! f# g- q3 J: T
* u: Y' l6 d, }( d3 j2 I# v; V4 j- function getW(str, font) {
w- _8 s0 [% T - let frc = Resources.getFontRenderContext();$ Z- n: `6 W1 Y+ Y# y4 l& f
- bounds = font.getStringBounds(str, frc);
$ X! ]' D' k" i2 v - return Math.ceil(bounds.getWidth());
3 N1 Q/ y9 J, E5 i. g - }$ {6 u! `1 J4 c( t7 e
- - }( a( A) w7 |9 x5 w, f* I
- da = (g) => {//底图绘制
5 k# r& m: T/ O+ x$ r - g.setColor(Color.BLACK);
# p+ Q# e' K5 V1 D) t, h - g.fillRect(0, 0, 400, 400);
# y% M4 X: i2 I& \ - }
& h3 _/ i! b7 v: T3 b - $ s, B# y; N" f; b" l4 e
- db = (g) => {//上层绘制: i0 O2 b7 ^ W+ t# L
- g.setColor(Color.WHITE);+ m/ ?; s; r" Z8 I9 V5 O, T. Y
- g.fillRect(0, 0, 400, 400);/ e2 H f2 j, |$ ]( s0 p
- g.setColor(Color.RED);
" G* M, N. x0 L6 \' w - g.setFont(font0);
5 z. W. ]; [/ S# O: D) K5 y - let str = "晴纱是男娘";
; H9 u! ?/ V' `5 g( B# W - let ww = 400;0 |6 d( ~8 H. n" b$ _
- let w = getW(str, font0);3 k' @ _$ L6 X) g
- g.drawString(str, ww / 2 - w / 2, 200);
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0 T" k0 z9 [1 F- const mat = new Matrices();8 x# M9 d' G# g1 w8 W0 L
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
% m( z/ O, D) q; { - let info = {9 ]$ \- M% W v& E
- ctx: ctx,
|- Z0 n* F) i - isTrain: false,
. c% J1 N8 r# g8 ^ - matrices: [mat],& I2 J+ _& U$ E0 `" H$ S/ Q
- texture: [400, 400],5 c' w, S t2 T9 I, s1 G
- model: {2 z7 x& p6 Z: _" o
- renderType: "light",
8 ]+ A/ n7 j, O# Y - size: [1, 1],
. g4 A @2 v9 d - uvSize: [1, 1]& K3 [. P1 W8 h( W1 l7 N
- }
' {5 [! u, }* A( |9 t6 ` - }: v$ O# j/ e! j8 T8 w
- let f = new Face(info);- f0 T. Q+ |# n5 F
- state.f = f;
; l H( |: r( i$ I( M
+ D3 n. O: Q' B/ f- let t = f.texture;
2 T( C- c; t; h% f/ J) W - let g = t.graphics;
/ t0 s! G4 }3 n - state.running = true;) @7 }$ a/ W: L# q$ o1 A
- let fps = 24;
3 ~# o( H" a5 v - da(g);//绘制底图
0 R6 m7 b5 e3 a4 c - t.upload();
7 t7 j, ^8 r2 ^; K, }5 o6 w - let k = 0;5 Y$ u) [7 o/ [7 G5 z h' L
- let ti = Date.now();& g; \4 S. t- j$ \" x* S, J
- let rt = 0;
* n8 H# o& z: g, B6 W, i - smooth = (k, v) => {// 平滑变化
e" C, q+ i$ w: { - if (v > k) return k;
7 S' _' B$ ?* y. H" {8 B - if (k < 0) return 0;, a, N3 P) `) U
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
- t1 n( F' [1 E" C1 e" x: H - }! F; G# e5 y0 a
- run = () => {// 新线程
( f* C* q: H% i' E/ T* f6 [& g - let id = Thread.currentThread().getId();6 Z z$ Z& L F" T; j% d- r9 _
- print("Thread start:" + id);
4 a- z& y3 \/ E9 @) G - while (state.running) {9 w8 @, P6 ?1 g+ K2 Q9 W9 B+ E
- try {
6 @' D1 f3 a1 c+ L& o- b* c4 z$ S) w - k += (Date.now() - ti) / 1000 * 0.2;3 _* B- o' x/ |4 }) _1 S
- ti = Date.now();
' @3 q6 g5 J: P! ?% r - if (k > 1.5) {' N2 R3 x# x2 e" C) }( l1 v
- k = 0;. G* ]1 _: a6 y
- }
y. p, X1 y2 D3 f: s5 n - setComp(g, 1);
+ u& l* J3 ^5 S3 A5 l, M- C/ x - da(g);
8 q t' F- F: h6 D* ]2 w; P - let kk = smooth(1, k);//平滑切换透明度& k" \8 M) v/ W$ {# {' k- j+ d
- setComp(g, kk);
! l# Y, e P1 f5 Z& H4 `& o+ _* O - db(g);1 h. R }. v9 a* m ]# o* m" g
- t.upload();
0 J+ z( A) E. ]$ v - ctx.setDebugInfo("rt" ,Date.now() - ti);
2 v: Y. P3 X. d8 S' ~: @6 y( C - ctx.setDebugInfo("k", k);
% \% B% S. G0 l* Y4 t# p - ctx.setDebugInfo("sm", kk);, V1 q0 a" t/ [- P' G
- rt = Date.now() - ti;
- Q. C1 V: j% M - Thread.sleep(ck(rt - 1000 / fps));3 b4 N, [6 D' l# n
- ctx.setDebugInfo("error", 0): `7 C8 d2 J" j$ t& U" _
- } catch (e) {( @* }4 k3 b% K7 ]4 J# @
- ctx.setDebugInfo("error", e);0 J8 c( x; z- C* ]( s+ m) {
- }
" D" C' b' s" h+ s4 x5 `# C3 e. c3 ^ - }& E, n0 I) d' z7 O0 H, ~. s
- print("Thread end:" + id);
/ J% M* Q3 S/ T/ W6 _- T5 V" N. l - }& i3 L1 z. T9 G' U3 K" v
- let th = new Thread(run, "qiehuan");
1 |1 v+ ^: |# M4 H - th.start();; ], M1 E, Y6 o: E1 T" Z
- }
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) E4 o( ?$ Q0 T+ a. m7 M8 f- function render(ctx, state, entity) {8 a% y# J% p3 {) U" ]
- state.f.tick();, q) n. u" S+ S: c$ Y' V
- }- E! q" X b! R9 \6 \0 A* a1 _
- " `5 @9 M8 I4 j/ ]9 P7 l
- function dispose(ctx, state, entity) {
7 C l% B Z% w - print("Dispose");
J. u1 X7 r* U2 {% e B& ~8 R" @0 M# F - state.running = false;
2 i* I- c/ K- \ - state.f.close();
7 ]9 v& D$ b0 W - }3 R% s$ b* p( t! r0 O
- . R O0 Y6 l! a& s+ h m) B' R0 h
- function setComp(g, value) {
/ Q3 U& h; X6 Y' } - g.setComposite(AlphaComposite.SrcOver.derive(value));
* E0 t: ?7 U; u0 T - }
复制代码
9 }% t4 \9 k: V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。5 s( V0 }& {7 @; G1 F( j
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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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