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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。8 }6 t# I! C# w$ v# u) L
- importPackage (java.lang);
: | y* x. ^8 _# Y5 X, c9 ^ - importPackage (java.awt);
# `' f5 p# B0 Q4 B6 Z - : T+ \/ n' H: W9 \2 L- ` z
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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& ]/ N2 r1 N; f- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 j: r* I- u5 \8 L, x S
- 5 ^6 c7 E ~& J. V# l5 L
- function getW(str, font) {$ k2 e6 X8 i9 M% y+ A! y9 n
- let frc = Resources.getFontRenderContext();% S- M9 Z: y/ p. R; t
- bounds = font.getStringBounds(str, frc);% h, q0 Y7 K- j8 m) Q8 `& c9 i% Q
- return Math.ceil(bounds.getWidth());+ G! T9 u( f( {; W
- }
8 a- t- Q' Z0 d3 X7 o7 [# b - 2 E2 c- ?8 ^6 @5 E6 \( X1 ^2 S$ P' N
- da = (g) => {//底图绘制8 W. ?. k6 M c' F) z) C
- g.setColor(Color.BLACK);: X E/ G Y4 O1 E- u* L1 r7 v$ L
- g.fillRect(0, 0, 400, 400);- n6 t+ q$ r2 H3 X! B) b0 @" _
- }
6 M4 X( u3 S6 z/ `7 f* ^ - 7 Z Q i7 A! m4 ]) c% t6 {
- db = (g) => {//上层绘制
/ g9 L+ [ ~6 b! z+ L$ N2 h - g.setColor(Color.WHITE);2 M, E& ?" L6 E) t; J! |$ C* U
- g.fillRect(0, 0, 400, 400);
$ L& i, Z x' @9 @ - g.setColor(Color.RED);
8 J5 t' u0 h' Z: I$ L - g.setFont(font0);/ n* y6 f1 g0 O# G
- let str = "晴纱是男娘";
' z" i2 L8 Q- W& ]5 P' J, h; Z' z - let ww = 400;8 x+ e6 z' u( A. ?$ N$ X
- let w = getW(str, font0);/ R9 c+ v) r0 L4 {
- g.drawString(str, ww / 2 - w / 2, 200);, k7 _) g9 |$ F6 a/ G0 w" \ t+ B' d
- }
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- const mat = new Matrices();9 C- o. Z. T# e
- mat.translate(0, 0.5, 0);
) ]: q- w4 y+ S( X% a9 i; C - 5 m: r7 L) Z; y8 E4 Y& ?
- function create(ctx, state, entity) {
& L3 K, N2 c/ w6 g/ v4 u5 W8 f# ~! {- O9 s - let info = {) B; ~0 c" D* ^5 p; j
- ctx: ctx,
- ]' y* t& D3 i$ g - isTrain: false,# [- |- L1 D; J* a# F
- matrices: [mat],
, `4 T5 t! K s# S2 A - texture: [400, 400],5 E9 X) D) }) Q9 U
- model: {
0 h$ H! Q$ Y# T( `4 B% i/ S - renderType: "light",
0 W5 R0 O9 {+ v/ q - size: [1, 1],
i- N5 r4 S6 r$ s1 {6 \ - uvSize: [1, 1]
N' G' K; p# l; L - }
- l8 B0 _# `8 f2 B - }
" m+ b V, {$ u5 h; u" N - let f = new Face(info);
# H! S- z4 ]- b# _ - state.f = f;
( A- n$ X8 {" a1 }1 j
; ^" B# f: W! ^+ A& s9 {7 ^6 N- let t = f.texture;6 k! p, O( T. O7 X/ ?9 M
- let g = t.graphics;: o: D6 g, \+ D' G- m! F8 I6 t) Z
- state.running = true;2 T6 [: E- i& P4 L; O
- let fps = 24; N6 W: E$ d6 A
- da(g);//绘制底图% c# p& }; z4 T% {# I4 h
- t.upload();% a) H" R7 U! c7 q2 e
- let k = 0;0 i; W$ z" S' o
- let ti = Date.now();: C; C9 @, e) `; Q
- let rt = 0;& k- h# O: O1 z
- smooth = (k, v) => {// 平滑变化' A( K$ o) e9 o' A
- if (v > k) return k;
5 _3 T$ H( a$ ]! v* [7 ` - if (k < 0) return 0;
/ M; [/ X4 m: b$ z - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 ^" {: l/ u9 ]! @9 B" W' U: W* |2 I9 l
- }
6 O5 Q2 X. |- x _ - run = () => {// 新线程
% V$ M- d. L% l' u! g& K - let id = Thread.currentThread().getId();
2 L# L1 p- r" W1 p - print("Thread start:" + id);! {' \1 A8 J( V2 k2 _& B7 F: E
- while (state.running) {3 }4 @7 h! e* W
- try {8 n, a i, f2 [- E- |
- k += (Date.now() - ti) / 1000 * 0.2;+ `6 r. t' T# B. U0 g+ {. Z( D/ c" [3 _
- ti = Date.now();# E% Q# n& t0 G; K9 [
- if (k > 1.5) {) E: }8 O1 j, m9 f
- k = 0;
2 J* D h3 _& J0 ~4 L! ~ - }
* h1 n5 W( X4 N: q8 B, l" i2 ? - setComp(g, 1);
, k! G& k# k' R" X! H - da(g);
9 m. ~& y/ t# r' @ - let kk = smooth(1, k);//平滑切换透明度& O. F! `5 a; A4 X( j) @
- setComp(g, kk);2 o/ f9 L( R1 _ V0 j; m6 C
- db(g);- |2 r& O+ G3 r+ F
- t.upload();5 `+ g+ d) |7 s0 Y9 t
- ctx.setDebugInfo("rt" ,Date.now() - ti);
) f9 V7 }- ^4 d7 ]* w* S - ctx.setDebugInfo("k", k);
+ P4 |1 p+ O& o4 Z4 e. X - ctx.setDebugInfo("sm", kk);
' u$ e9 u+ ~( P; [ - rt = Date.now() - ti;; L' c) p1 K0 w- D) _
- Thread.sleep(ck(rt - 1000 / fps));( k1 A* o# p% |
- ctx.setDebugInfo("error", 0)$ j9 n- p$ k z: [
- } catch (e) { D; Y" ` V: q- s+ K
- ctx.setDebugInfo("error", e);
* X$ J. [) A- r7 {+ Y - }
- f) C% g9 H7 t" w; ? - }$ @8 u2 S+ i( G* C9 u2 g, X, p
- print("Thread end:" + id);" g8 F( O: G( ?% ^: N( J- C& ?) \
- }
+ X* e( T0 b, m7 c8 E+ R5 @* S& b - let th = new Thread(run, "qiehuan");
8 e" }2 R3 L$ g$ _ - th.start();
" f" t6 C- K1 ^! d. p - }
$ o# x8 h2 n K4 ~ - # x/ U" I/ s3 ]* F) S9 b/ U, o
- function render(ctx, state, entity) {
/ J: A7 o6 c0 o- ?! w - state.f.tick();
7 Y! b) n+ R/ {1 J - }9 u8 U. v3 x* [, m, p- m' T9 F7 G
- - k" ^& z+ q8 Y( m
- function dispose(ctx, state, entity) {
P, u0 h, D2 u4 R3 P% c; k - print("Dispose");
: v4 E8 G' X4 D& V) s3 R* E - state.running = false;& J2 V8 [6 `/ G
- state.f.close();, w2 R3 |0 l2 P1 L1 N
- }5 n* s7 c* G0 O- N5 r* t
9 d* I1 [( M$ E) \8 X8 v- function setComp(g, value) {: M+ r6 ?! s/ E6 \
- g.setComposite(AlphaComposite.SrcOver.derive(value));
) G" y/ e( b. p - }
复制代码 " p6 _. S9 q' Y7 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。$ ~, L+ S/ O+ a1 U9 p
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9 V* K9 c) Z1 v% H2 K, {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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