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% @8 R5 k, c9 |% x! g) \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。
' o; X$ p: t) y( T- [' f# Y2 D0 Y4 x- importPackage (java.lang);3 @; y# P0 U; ?4 v9 r. E- R" A
- importPackage (java.awt);
2 ?6 A/ ]4 c C0 `% s8 F+ Q: g
' a/ M1 F& K; ]+ I4 J( j$ f- include(Resources.id("mtrsteamloco:library/code/face.js"));% d' h( G7 q' \0 V/ X4 l: A& O
' x, v' S4 B1 A$ f" N& J- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);0 ]$ y) F- @: A7 [
1 C: P9 [, q& a4 ]4 j/ D- function getW(str, font) {$ X4 Y1 Y3 k+ t8 W4 C$ V8 @# F+ F
- let frc = Resources.getFontRenderContext();
6 j$ A0 A# b0 c - bounds = font.getStringBounds(str, frc);
- c/ B- o( ^+ m5 c% w - return Math.ceil(bounds.getWidth());
+ l" }/ N6 @ u - }; Q- s+ A8 Y4 K7 m
- 3 s! C1 _) h- ~( C/ Z
- da = (g) => {//底图绘制0 x, t/ Z ^3 C
- g.setColor(Color.BLACK);
R4 g" O+ K4 c. }8 m - g.fillRect(0, 0, 400, 400);- }* @' r- F0 x2 F! v3 w- g
- }) ?& y+ S+ h' L% _! a7 h
9 J) Z; I, d1 _) A5 F3 J, i& e- db = (g) => {//上层绘制
' B% w4 t: I5 e2 j, ? Z6 { - g.setColor(Color.WHITE);
! P' P9 e B, H- y4 ?# G G - g.fillRect(0, 0, 400, 400);! G- M2 R7 a5 b5 O8 g5 _9 I
- g.setColor(Color.RED);8 a4 f- x3 X. l1 J4 C
- g.setFont(font0);5 T) Q+ |( M0 z5 P& K& O9 _7 r
- let str = "晴纱是男娘";
0 `6 Y0 v/ X1 { P5 } - let ww = 400;" K- q3 y$ d, e* ]8 ?; `+ w" t
- let w = getW(str, font0);/ p& D8 q' Q, ~! a% B2 S
- g.drawString(str, ww / 2 - w / 2, 200);
" q' x5 [4 v6 M; e3 r* {# k9 ` - }& D" l% z/ g4 ~- Z! i
6 P D: _9 d5 I3 B* w+ p4 b9 x- const mat = new Matrices();
+ r, R, O$ ]- Y6 {) J3 X - mat.translate(0, 0.5, 0);4 C4 V5 n; `5 r
6 c6 g! f1 M9 d5 T- function create(ctx, state, entity) {1 w$ b' T5 J7 O" b
- let info = {/ ?+ r9 D# W# d; E
- ctx: ctx, Y/ d" W. m' x% Z: n1 n
- isTrain: false,
8 U% k6 r6 L! W2 S( t) y4 j - matrices: [mat],
7 U* y+ K) \( z% ^2 X$ x - texture: [400, 400],1 [/ q# Q' [0 h# u' ~
- model: {
' M. u. c3 Z q* g: K - renderType: "light",
2 _ i1 p. @+ {- f5 | - size: [1, 1],3 M1 }! ~. I+ p. \
- uvSize: [1, 1]
9 C. T1 Q$ f0 e! p. E - }
5 A4 ~, R& ^7 \3 O, j - }
9 w- m6 F; u% N7 o- S/ n1 G - let f = new Face(info);; g1 v9 b( S- Y8 l# ], W
- state.f = f;
( e0 \; _4 u" a - * `/ c1 [" i$ i) H0 [
- let t = f.texture;
! y5 Q3 N. o/ @$ b) L; W: b - let g = t.graphics;% k0 B4 K8 Y$ d( y
- state.running = true;
g) c: f. {0 L/ Z! b1 o" M. B: c - let fps = 24;' m( j1 S A( [
- da(g);//绘制底图3 V2 Q. ]# P1 G) O4 i, y# @
- t.upload();) X% ?' ^7 F A* R5 P
- let k = 0;' [, k3 c+ ~/ w3 Y4 T
- let ti = Date.now();
) O" T- V# f6 y; c' \ - let rt = 0;5 q' e, X- I( b! U
- smooth = (k, v) => {// 平滑变化
) N; l) }* c) _ - if (v > k) return k;
& b% P) R) ^1 k" K - if (k < 0) return 0;5 f9 j" U9 A+ J/ t( P
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
1 A2 B, O/ [* F" C - }+ l; ~( w9 g6 t9 E2 T- q8 c% U
- run = () => {// 新线程! }% z- u6 y2 c4 A& g- c4 K
- let id = Thread.currentThread().getId();
: L5 A) G- r. n" L - print("Thread start:" + id);6 i/ e% G- }1 U% l0 J( b) @, l
- while (state.running) {
+ e' y, F* v4 }) o- S0 } - try {# ]( Z$ K- {1 y1 r, M% ?1 g
- k += (Date.now() - ti) / 1000 * 0.2;
& ^6 V' F/ P$ w% k' d, N - ti = Date.now();% T4 I( t5 D* f$ y$ d
- if (k > 1.5) {) B1 h& T+ ~& x9 {* h* a& @5 V* P
- k = 0;
9 @* V- H- y* l* B6 ] - }
% q: P$ t0 k6 H5 u$ S4 b5 P* b - setComp(g, 1);1 |5 w0 P; u; [: Y* W6 ^: p
- da(g);
# z/ D( o% O+ q& z - let kk = smooth(1, k);//平滑切换透明度
' T( u" A7 ]8 |/ k" D - setComp(g, kk);( O# S2 C ^- y" ?2 d- |* w
- db(g);
' z6 ^% f% o* z& C - t.upload();6 P9 {2 C2 V6 H2 k3 b( V3 h t
- ctx.setDebugInfo("rt" ,Date.now() - ti);5 |. F6 J, Y7 q" {& |
- ctx.setDebugInfo("k", k);
6 w8 s+ A# G4 o% b$ j3 c7 l - ctx.setDebugInfo("sm", kk);
% e* L5 \1 O! q7 C1 K - rt = Date.now() - ti;
: [8 R8 Z1 b9 ? Q' s) t* p - Thread.sleep(ck(rt - 1000 / fps));% O& A' c# s9 L" w" Q& i a, v
- ctx.setDebugInfo("error", 0)
+ L! H8 b0 S% @! c) P8 [5 j1 W - } catch (e) {; P% r* X/ R6 i
- ctx.setDebugInfo("error", e);, k1 z+ I2 U5 S" N: H$ x
- }8 F# @3 X) h- \( f/ K7 R$ d7 R
- }
3 i$ E) F, ` w+ p: F# w! ], b$ r - print("Thread end:" + id);
6 x; n N+ b8 q% W - }) `" u; l, p# E3 ~$ W# N w
- let th = new Thread(run, "qiehuan");5 _' r f0 d7 R+ @: [
- th.start();4 R! W/ V) F) I6 ]. l
- }, c6 a3 X, s9 t2 | o' g3 M: }
- 6 u- O, f" P6 o/ P
- function render(ctx, state, entity) {
- d' X( v9 K4 n0 l3 {/ U - state.f.tick();
/ |8 a& x* R5 [2 m5 ?7 C - }6 T1 r4 e Y) B9 `/ i$ V8 e) |
( \) I) Y3 D x" W0 F+ N; v4 _, H- function dispose(ctx, state, entity) {5 |; z: t% \/ J! C% T0 h
- print("Dispose");
/ n# S) P+ N$ `2 e& ~( N' f2 \ - state.running = false;7 K5 w# j8 n S1 N* ~4 B% ~
- state.f.close();! `) @( N2 n8 [9 P$ G% U
- }
5 Y+ U) l. m& h% p$ u; m( m - ! }- Z$ l6 n& |, P, M
- function setComp(g, value) {/ p3 x( k( Z h: D. m. V. J
- g.setComposite(AlphaComposite.SrcOver.derive(value));
4 Q7 u2 @6 L- O' t8 {. W - }
复制代码
$ v" Z8 B' {5 r3 l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。$ `. \; J& ^5 y9 L( O2 |, K
; Q0 _2 u8 n6 n
4 ^) p6 C1 U( @+ A% f顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下): O' F% f. e- D6 R u
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