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* J: n, R: d2 L( t5 b3 ?" A/ l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。* t- ~0 ?& e$ \0 N( o4 U
- importPackage (java.lang);
# ~0 f9 a/ {8 N S( K2 ^ - importPackage (java.awt);$ C: [4 E/ ?; v! Z. a6 m
) @. E( Q! n: k% G4 D- include(Resources.id("mtrsteamloco:library/code/face.js"));+ C) r2 J x0 F& {
- ) ]" M# C+ q# j3 @! O
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);8 s, ^- H/ ~# Z: \% |0 }
6 ]6 P% g- A" Y E( S* H- function getW(str, font) {) T6 I0 O' H/ Z
- let frc = Resources.getFontRenderContext();1 C+ S6 T% i6 I, m a1 @, Q
- bounds = font.getStringBounds(str, frc);
2 [; L2 h2 J2 t" \; ~ - return Math.ceil(bounds.getWidth());
% q( M! u: I* V2 [9 x+ Q - }
2 c* c9 L9 [9 X) c( `$ T" Q
3 ~+ j/ D# P/ L+ v) j- da = (g) => {//底图绘制+ X: H. K. x/ ?
- g.setColor(Color.BLACK);, \& F# Z u+ O6 j) b5 q8 \# V
- g.fillRect(0, 0, 400, 400);
+ g# O) `3 j( p. _5 B4 W - }+ p- d/ }2 ~ ^: s# b
- 2 U4 w% D' X: k/ ]7 r/ R
- db = (g) => {//上层绘制5 a6 {5 s k! w$ I
- g.setColor(Color.WHITE);: A/ k0 r( k4 |
- g.fillRect(0, 0, 400, 400);! t! W9 j. d/ z9 N' _. r
- g.setColor(Color.RED);1 m, B6 z6 m [" _" @) l
- g.setFont(font0);
( W3 [2 a i; Z! y7 O - let str = "晴纱是男娘"; w/ v, T2 [3 B* J* Q
- let ww = 400;
/ B3 W' o. d8 {+ Y P7 `6 W - let w = getW(str, font0);
' ^ {0 ?9 r# T" h- s - g.drawString(str, ww / 2 - w / 2, 200);4 ^: t" P, T( ^1 H, E! r: K' |
- }- @, F; N" c4 A) L- o' }) W) K
+ ~. X5 \0 H) o& j( F/ D! a- const mat = new Matrices();
9 j; e [: f5 D! i+ q - mat.translate(0, 0.5, 0);
( r# @' ]% y9 v% t! k' D
" j3 W6 l6 L8 q7 Q* G- function create(ctx, state, entity) {
! k4 J& y3 R1 I4 J" V - let info = {
w" f# D* A, w: I5 O8 [% i - ctx: ctx,
3 K: l; D2 F" B7 n - isTrain: false,1 ?- F% V0 P+ E. V w! |
- matrices: [mat],' M. F. N+ ?/ P) L; e
- texture: [400, 400],) z: {' q( v# N7 q" _" k6 U! O# z) j
- model: {) T5 i* u2 P6 E! ?5 M) ?! E' c5 n, b; U
- renderType: "light",8 [$ w3 I3 j3 S
- size: [1, 1],
1 I7 @4 K8 P" d! G' {# N }7 S! y - uvSize: [1, 1]9 n( ]# ^) }9 L- }4 @' U3 C
- }/ q1 [- p2 }. w- I4 [. g
- } H& A8 H& Q# C' H, h; K$ A
- let f = new Face(info);7 P$ e f/ P a) \! y9 [" p
- state.f = f;
7 A& r7 h1 c$ H: l$ ?0 K6 y+ X - ; q, `# {' A2 D4 z7 j$ d
- let t = f.texture;* D6 w& ?0 d1 X4 Z: e- U- |
- let g = t.graphics;
7 L0 ]# G! ^; c/ H - state.running = true;
* P4 H8 C* F* G6 Z - let fps = 24;$ \/ J: a) N! ] b6 ~9 _2 }
- da(g);//绘制底图, Q2 _. ?( Q8 p
- t.upload();
8 l. R1 n* C z3 g - let k = 0;
. t# I+ {! [2 g5 A3 V9 x5 V! g. q4 | A - let ti = Date.now();9 B; q3 i% }$ t/ F/ k5 V
- let rt = 0;
6 W2 `& ^ m/ {* _- { {! ^" z9 i - smooth = (k, v) => {// 平滑变化& l- J m2 A/ K4 G
- if (v > k) return k;
& P' T+ C R' F7 j8 b1 K I8 r& S - if (k < 0) return 0;
3 f* {. j. b x+ G, _2 h- L% H2 z - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;5 [+ j6 m8 W6 }6 a# g* {
- }
o5 n6 N( T; v+ h% ? - run = () => {// 新线程* W- u9 C; u4 C2 [/ K
- let id = Thread.currentThread().getId();
$ A7 }9 K- F: J4 }0 o - print("Thread start:" + id);
' I7 ]9 d' T3 E$ f! b. T; F - while (state.running) {. u: w" V, p2 s' Z$ |
- try {
4 K V7 M8 x$ U - k += (Date.now() - ti) / 1000 * 0.2;- t5 H) M7 S: s) n
- ti = Date.now();& X1 D' ~1 H+ F
- if (k > 1.5) {
( ]/ W, s& M5 K8 r - k = 0;
9 s0 G* Z5 |% C1 W3 F5 v - }7 [; B, Q3 u4 q/ O% }7 }+ P9 C
- setComp(g, 1);
; D9 P" g# \: N% \# s' u - da(g);' @4 e% \1 P9 m' t0 M' L
- let kk = smooth(1, k);//平滑切换透明度
7 | _# Q, k" i- `6 t8 V - setComp(g, kk);
6 s" z) \9 d& l8 `! _& C& g9 B' p - db(g);
' F) d3 F- R( x5 @9 Q - t.upload();/ W; \% H5 J8 n1 i. I0 V
- ctx.setDebugInfo("rt" ,Date.now() - ti);
0 R9 k" [& [. ^ S2 Q# z - ctx.setDebugInfo("k", k);
4 e2 @7 C; \ o. \) k - ctx.setDebugInfo("sm", kk);
6 y' V7 C0 Y) H" {& `$ X9 i - rt = Date.now() - ti;2 G" ^3 C$ F7 I& M" ~
- Thread.sleep(ck(rt - 1000 / fps));. t1 I: J- l* [
- ctx.setDebugInfo("error", 0)- }: e( e6 U1 c. f3 |0 L+ v/ @
- } catch (e) {: m" C5 Z1 T. `, d! Q Q
- ctx.setDebugInfo("error", e);
1 F) B- _: q2 l0 i9 U/ D% ~, u - }
& f; O, j- |3 k* C! n - }
' }; B' u; v; k" y - print("Thread end:" + id);# j; |# q j, F
- }
& N/ A A; J ?( W+ K) Y' K - let th = new Thread(run, "qiehuan");; a* c/ i8 l$ D9 a. l `
- th.start();
7 x5 Y* ?8 F! K" q, ] - }% m% l* g* |7 X9 n
) M3 b5 a& n, Y. w( P' v( a6 K. Z- function render(ctx, state, entity) {
0 Z H) P5 Y+ E9 y% ~/ u, k' [ - state.f.tick();: c1 C' P9 d! g' C
- }
# G7 `$ C- T% u7 g- ]5 V/ \
& c u5 ?+ D5 }; I# D2 L7 A2 \6 G- function dispose(ctx, state, entity) {9 l! @( w; b5 o$ @8 |: ?5 x. Q
- print("Dispose");0 D, g" N7 B* P5 M; \. h0 Y
- state.running = false;9 O6 K* K, Y. _$ ~. f0 o
- state.f.close();7 V5 A+ M4 A1 |1 ^0 ?0 i
- }
% W4 _) @/ h- q8 V: d3 V - 7 C$ x& L1 @/ O+ ~2 [6 l; S1 ]
- function setComp(g, value) {- U7 G& i3 P g$ P+ Q
- g.setComposite(AlphaComposite.SrcOver.derive(value));& U' `! x" q7 \
- }
复制代码
" ]& y/ Q) l$ v: [ n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。
6 t0 o' v" M U) B- p1 ~" E" g9 j; }- }5 R* ]
% e* D* B5 h3 S' B
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)$ S0 x$ Q( ^3 v6 F" L! e
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