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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。. p( l1 S. }+ X# `' _# n
- importPackage (java.lang);
7 m/ H# O- V% d - importPackage (java.awt);3 } g$ Z* t" v) j7 i1 b
- ; {0 t$ j. w4 l) k" `0 e+ O8 T
- include(Resources.id("mtrsteamloco:library/code/face.js"));/ F7 I2 p* u+ S7 ?5 _8 l' |' }
- . G7 [7 M. }% s
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);3 t: c5 C4 b$ z
9 r+ M% [3 v* Q) o7 `2 y) Q+ `- function getW(str, font) {' j- n) w1 E) `# O) P7 H. z
- let frc = Resources.getFontRenderContext();' n8 e8 M3 j1 o9 i- w& [$ G
- bounds = font.getStringBounds(str, frc);$ u! q4 p# v$ b
- return Math.ceil(bounds.getWidth());
2 S0 x7 _' s# z o6 z/ G( {- Y: Z - }. ~4 p; l' f) i5 }; K4 i: D$ F
1 H) C9 H2 t2 K- da = (g) => {//底图绘制; `) Y, I% H4 L) G, ~ b
- g.setColor(Color.BLACK);6 d0 V. C- {' S$ g4 x2 g' Z
- g.fillRect(0, 0, 400, 400);
% ?$ g, ?' E+ K w5 z1 X! w& `' m - }7 W0 {9 D& k j# k( l9 n% j5 _
- 8 @5 J4 w% n8 n
- db = (g) => {//上层绘制
# V4 t1 i9 g" e7 J7 Q5 [: S' L* ] - g.setColor(Color.WHITE);
: B2 ^4 ^( U7 X' F1 A$ Z) b - g.fillRect(0, 0, 400, 400);
5 z0 n' q% U, `4 U: p6 C$ C - g.setColor(Color.RED);
: k- C( G8 k- ]' z$ k0 E - g.setFont(font0);1 V) M$ M+ ~& Y5 C( M- X
- let str = "晴纱是男娘";
9 r% ?. g2 d9 y5 I - let ww = 400;6 y S/ X5 V( s* e
- let w = getW(str, font0);
% v ^2 D, t$ U- @' z- @+ w0 r - g.drawString(str, ww / 2 - w / 2, 200);: l+ r, [6 s4 }
- }+ w9 Y& U+ P7 ~2 `/ }
- # y' c; R1 }5 c4 W! k* \
- const mat = new Matrices();
# y. E1 k* O7 s- {+ w - mat.translate(0, 0.5, 0);1 q# E. G( ]: I; K8 J' |; y1 P0 r
- H9 @/ J# ~ u/ \- v- function create(ctx, state, entity) {, M0 f5 Y: W! n' O
- let info = {
; J9 i. j* s* d4 f o - ctx: ctx,# Q C- S" N' e. p
- isTrain: false,
0 ?5 x8 d/ h% @4 L - matrices: [mat],
* h" y" n& C& T4 o# q: Z - texture: [400, 400],
% S& W/ h7 n8 | - model: {
2 S2 L4 I/ k- o: N; S - renderType: "light",- Z9 C5 T$ C7 G9 H; _
- size: [1, 1],% ]- T) }+ _& r# X# _. [6 F
- uvSize: [1, 1]
# k4 B; J) ~- k+ ]! D3 _ - }
% x4 c8 o6 l% F# E5 S9 k* O - }6 O7 v) @# Y" Z, M
- let f = new Face(info);, x" w( f/ j. w; J1 ^6 G
- state.f = f;$ _. V: o, V; J1 ~( M, t' d$ [4 S3 R
- 5 ~9 d, r: }2 i& l, @
- let t = f.texture;
9 c0 y$ T1 ]4 V* L9 g5 R - let g = t.graphics;
9 F( Z% J! \, @) j7 H' t - state.running = true;, [- |/ h- g: A; R
- let fps = 24;2 `* [' r! t, M* c$ p. q% m; I
- da(g);//绘制底图
4 H# k9 |" k6 Y( l0 A - t.upload();
: x% J5 Z! c/ A* u6 N/ ^2 h# H0 d - let k = 0;/ G+ v- w0 Z& Q6 c. T
- let ti = Date.now();
" `7 g9 g/ K; J+ J. ]8 W - let rt = 0;* h* |2 _: L5 p8 M2 C# s9 w
- smooth = (k, v) => {// 平滑变化
1 _3 K& F v+ c4 A6 R$ X7 \ - if (v > k) return k;4 @4 b% ]: I3 ]8 ~! @
- if (k < 0) return 0;
8 [0 g$ N7 I, H - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* h4 u; _' y/ e* e& v. C - }2 H. m+ `) d! G4 k
- run = () => {// 新线程6 N, Q9 J% o! h. Y
- let id = Thread.currentThread().getId();4 Z5 x/ c7 r2 r& p8 ]+ y& ^: d
- print("Thread start:" + id);
( K& g7 z- M# O% m$ H - while (state.running) {- e" z( }0 U5 u; H# O7 B
- try {
; Q* m7 P, f' x x - k += (Date.now() - ti) / 1000 * 0.2;
1 F. u/ B- K* ], X% j, b - ti = Date.now();
" _5 X) D% S* Q# _: L# c, ?5 L - if (k > 1.5) {
+ g- i7 D8 {3 Q4 c' C7 o - k = 0;
# J( C; ?# f9 ` - }; m; L+ z2 N7 s/ L3 H" p) b, D
- setComp(g, 1);5 w. R. G2 X$ O
- da(g);
" K1 d* W7 a6 }6 C) N - let kk = smooth(1, k);//平滑切换透明度
& H( W$ u) E3 R6 K) X1 [3 n - setComp(g, kk);% D7 X) w8 a4 l. s. |% {+ L4 X
- db(g);
" j) W0 b8 M( F. O - t.upload();
: {' B* i0 ?# {! X - ctx.setDebugInfo("rt" ,Date.now() - ti);
2 K7 u- _9 n/ ]% L0 V# A - ctx.setDebugInfo("k", k);
8 c" V5 Z( G0 F - ctx.setDebugInfo("sm", kk);
7 d& ]' f: o( p/ V- F0 h - rt = Date.now() - ti;
% a" P$ Z. J) p5 ^* n& S: z - Thread.sleep(ck(rt - 1000 / fps));" g' Q; u p! M. B R
- ctx.setDebugInfo("error", 0)
! n. H2 E+ H; [4 K r0 a/ F - } catch (e) {! Q: d! ?( e; ?8 }# `4 l
- ctx.setDebugInfo("error", e);' _* r0 ^* R0 G# A) `/ f
- }
% x5 _1 X( m9 d# F - }4 E3 \0 d) l' k' A! h. D1 z
- print("Thread end:" + id);
7 m- o, o4 O$ e5 ~* | H( b - }6 |( B/ u! R% F1 f$ r/ q' A8 T
- let th = new Thread(run, "qiehuan");: d1 |4 S+ S( E. r
- th.start();/ q2 {5 m \/ ^8 b9 l& z
- }
9 J7 D1 [, u5 q0 Z- U# Y
% {& S/ V6 X' l' Q3 g9 r- function render(ctx, state, entity) {, K. L+ n$ V' G! K, ^$ Y' Q
- state.f.tick();
6 w5 f1 H" b' [ - }0 u; T) j$ q3 t$ O5 j% Q S
. K- u( ^& d# s7 o- w- function dispose(ctx, state, entity) {( g- _/ b/ t& R. [7 D! c' X+ ?! R
- print("Dispose");4 c9 o, M, Y: S$ G/ w5 k( L/ @
- state.running = false;
3 i! R& M) T) N, I" W5 N3 A8 X1 I - state.f.close();
3 @" X g9 k/ ] - }7 `8 m9 i+ \& W6 }# B
- 7 s3 _$ e: q4 ^ n" W; v
- function setComp(g, value) {4 a- _5 l! K3 h. K Y/ o2 t
- g.setComposite(AlphaComposite.SrcOver.derive(value));
" l( k4 I$ T8 `; S2 Q6 L, @7 K - }
复制代码
' q$ E' O/ f/ M+ z2 y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。. h. |, r8 h; A/ R
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! R" k8 @, K. D% y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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