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. _& m. c" e+ _7 ^. s2 M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。/ p9 y: U) u$ X" v; I! t! d2 U
- importPackage (java.lang);7 f+ V* n5 i8 Y- G9 A3 y4 U U
- importPackage (java.awt);
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6 P3 @+ |9 r, s- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, q8 L6 }7 T" H
- # G/ Q! C! y6 {' @& G) D% F6 s- n
- function getW(str, font) {7 R' L* u6 [# ^" W1 D2 p
- let frc = Resources.getFontRenderContext();8 P( A* U) [( J$ i) J- ~
- bounds = font.getStringBounds(str, frc); S" Q/ j; E, j' Q
- return Math.ceil(bounds.getWidth());
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! E0 U, o8 `5 O- da = (g) => {//底图绘制
9 ?* V8 Z* B8 y& e G- k8 i$ @. B) X. i - g.setColor(Color.BLACK);" X1 I, Z+ S; a
- g.fillRect(0, 0, 400, 400);" y" c6 X. s0 k/ S
- }2 U- L# ^* A/ C, i, {
$ E( T% t( A+ j1 W; n8 r- db = (g) => {//上层绘制
/ ?/ l$ R' G+ M; @ - g.setColor(Color.WHITE);1 \6 j* G+ F/ m! d
- g.fillRect(0, 0, 400, 400);! P6 W4 U+ ?) r4 N+ P+ ]( ~8 L, |
- g.setColor(Color.RED);
4 P% D) P4 d4 T) J4 r8 V T, h - g.setFont(font0);+ x9 b- W: M: w! D! F6 z
- let str = "晴纱是男娘";# O, v. Q8 d3 f$ @4 U& n9 J) Y0 \
- let ww = 400;2 r; O d0 j" L1 b9 t& R
- let w = getW(str, font0);
' I+ D) C) I3 h" s8 u' ? - g.drawString(str, ww / 2 - w / 2, 200);( O( b$ M6 e( z$ ]% D
- }
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' L# Y o) o9 c9 k- const mat = new Matrices();
- E/ l" B+ W+ v+ z4 A6 p - mat.translate(0, 0.5, 0);. X1 l! a# _7 |+ j
- 5 _5 P3 {9 R$ e/ P. a0 Y
- function create(ctx, state, entity) {
1 `8 c+ K0 H! {2 Z4 a - let info = {
: @4 C) D' t8 ?5 t! r6 X4 M - ctx: ctx,
% w% N/ t7 N) E8 O1 m - isTrain: false,
0 i8 p: U2 g$ ~# ?- \1 V) F - matrices: [mat],; {+ b7 _( P+ |- w" g( }5 E
- texture: [400, 400],
3 `( [1 L1 W2 C - model: {
# Y) ?3 F3 l% Z6 f - renderType: "light",
" n5 c/ q7 i. u1 F - size: [1, 1],+ a0 S; h8 g" T9 w* I" A
- uvSize: [1, 1]% U7 P* [% x* d* s
- }0 `; M; q2 G& N/ P5 {0 R3 O
- }% a0 e9 p. y0 i% Z7 p
- let f = new Face(info);. J; F6 Z& r/ g. g
- state.f = f;
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- let t = f.texture;
2 \0 t) i- B0 n0 b8 Y - let g = t.graphics;' K* q( \5 V: `& P: i
- state.running = true;
3 h3 w) o6 s, Q# R7 B$ l; e( i0 m6 ^5 ? - let fps = 24;; O% N& B+ ?$ v, s* i2 U
- da(g);//绘制底图' S% O* b6 L7 t$ `8 D7 Q
- t.upload();7 D" x' N2 t+ F4 R$ g
- let k = 0;2 H: N4 U" S. n9 d' ]% N- j q
- let ti = Date.now();4 O+ ~. g8 Z3 t9 ] p0 ^0 S& ]
- let rt = 0; _5 W; M# A6 n& S
- smooth = (k, v) => {// 平滑变化
, j* S' W4 L+ m z% y# H - if (v > k) return k;
. Y) q% w& y9 x z' ` @ - if (k < 0) return 0;
# J/ l, Y( n M, V - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;- z$ a9 {8 J1 n% U* t
- }
7 \7 x7 v6 K2 h, j3 d4 \ - run = () => {// 新线程
% i$ a, i2 W; y - let id = Thread.currentThread().getId();
0 Y, `& D0 K4 Z+ _- i6 a" q8 s - print("Thread start:" + id);
/ l5 E! {1 G* W7 i - while (state.running) {% Z! U! o4 G- {/ G- W- Y( c: a
- try {
( _' r y; t3 x5 i% X - k += (Date.now() - ti) / 1000 * 0.2;
8 A6 I' t8 c* X4 K# E, e - ti = Date.now();1 {0 D( y/ u. Y: Y& ]
- if (k > 1.5) {
% k& K7 J* y3 Y - k = 0;3 o7 R+ h6 E% I7 V) E& n0 g
- }6 T% ~+ y5 C( \* U) X9 X' o+ V
- setComp(g, 1);% ?0 t! ]& }& P
- da(g);( V7 X& W& V% Z- P/ t" F* O9 Y
- let kk = smooth(1, k);//平滑切换透明度: ]. h' N* V: k$ J, M% r
- setComp(g, kk);5 ^. Z* s1 a% m! s t9 r! k
- db(g);/ D, x$ a _7 k C. j8 y
- t.upload();/ l, ]+ Q z5 b5 Q7 p; ~( o. M- f
- ctx.setDebugInfo("rt" ,Date.now() - ti);
, G8 b" Y# L+ f1 [7 V [6 ~ ^4 w - ctx.setDebugInfo("k", k);
' \& _$ c3 R! o/ U7 H$ l - ctx.setDebugInfo("sm", kk);' M5 E( K" V7 Z! q, ~ w; p
- rt = Date.now() - ti;: p2 Q$ D7 p6 ]5 r9 ^! C
- Thread.sleep(ck(rt - 1000 / fps));
6 {) Y9 p: W- ^6 ]. n# Q, w" v - ctx.setDebugInfo("error", 0)4 s7 J3 P8 ?- b# J% `% `
- } catch (e) {
$ |) X* c2 f; Z% [4 N - ctx.setDebugInfo("error", e);! T; k. e' m' z1 P0 Q) S$ T
- }
1 B2 u1 ?" L: L7 h$ | - }
/ d/ ^9 g/ C) k& I( ~ - print("Thread end:" + id);1 S8 P/ ^: G, y' R! ?6 k! y
- }) l" N6 h" D) Q4 L3 g& t
- let th = new Thread(run, "qiehuan");
. Q) a* p+ E$ t/ N5 {: _ - th.start();2 ^* {5 k4 ]. A# u& T
- }
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& J+ L1 G" a9 E5 A6 R- function render(ctx, state, entity) {
2 y% D4 I0 I/ m. V% ]. y6 c - state.f.tick();
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- 1 I! |1 m" T5 V
- function dispose(ctx, state, entity) {
% Q: }8 i8 {+ r2 p7 }) R - print("Dispose");. r& I; C! |/ m4 F8 y2 c
- state.running = false;
. L7 \7 b4 n- ^ - state.f.close();8 j. D: X: ^: z5 m+ E% ~3 @3 i
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- + Z3 E# t. P6 X& b' E
- function setComp(g, value) {9 ^2 R: {* Q: p% S' j. c
- g.setComposite(AlphaComposite.SrcOver.derive(value));; |: R f6 \9 T
- }
复制代码 , P5 y2 Q- \. [5 ~4 o
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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" c/ `) Y9 f4 V8 k5 W顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)3 a2 }+ ]$ U! }2 j
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