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& T, S/ l0 U. x; v `8 y5 ?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。0 N4 P* w* T2 X; j4 O, s
- importPackage (java.lang);
+ U6 ?- F9 v6 |9 S; R - importPackage (java.awt);5 D- a; A# T) v1 O8 E
- / y/ Z" I/ k) I i, }
- include(Resources.id("mtrsteamloco:library/code/face.js"));4 u$ T" [0 M$ p* V- ] z% N' P7 H4 y
3 u6 r [& h" r4 O- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);) A5 L6 o" _7 B; x9 r9 _1 z
8 \, F8 v3 b3 G8 d/ p( D- function getW(str, font) {
+ f1 X2 ?& f/ P" Y- t9 j% K - let frc = Resources.getFontRenderContext();& L/ g8 H, y! ^" z
- bounds = font.getStringBounds(str, frc);# n1 ~% W+ U+ E
- return Math.ceil(bounds.getWidth());% o# S) b. e7 H4 o* O- F
- }
; O( `* B+ Y9 L& Z! K9 T h
# j! t7 \7 S: W; s/ I6 x- da = (g) => {//底图绘制
8 g4 Y( }& V& z" w - g.setColor(Color.BLACK);, _+ A+ y8 e' X# h8 H: ]7 [- c5 F/ x
- g.fillRect(0, 0, 400, 400);
: }. \# D s$ Z: g+ ^ - }8 @1 P/ Y7 s* }; J2 i2 P
0 u" m" ^+ P* B F- ]- D1 ~, Z- db = (g) => {//上层绘制
6 S# e8 U2 s+ q1 G8 l - g.setColor(Color.WHITE);
! ?$ W, I! H' b% h9 f( r- Q% u - g.fillRect(0, 0, 400, 400);
5 ~7 O/ r, b ` - g.setColor(Color.RED);8 _6 n+ U* I4 W8 Q
- g.setFont(font0);
$ Y% c8 K9 m8 F% E/ x6 n6 w7 x - let str = "晴纱是男娘";* x1 h) Q' h0 y5 Y
- let ww = 400;
+ s8 o2 F/ }( l+ |1 V - let w = getW(str, font0);
4 n- \3 c! D) k$ T" _0 } - g.drawString(str, ww / 2 - w / 2, 200);+ F( {' Q' K$ `9 e9 F
- }
. D2 H. U- L( o( L" k+ M" ? - ' q1 c/ l3 n) s! t$ y
- const mat = new Matrices();
h+ Y$ p. } Q7 i- Y6 S - mat.translate(0, 0.5, 0);
: y, z) J& J& R" O. I, g; f4 t - 9 k7 C" G1 ]6 b! `
- function create(ctx, state, entity) {
- @0 Y6 b6 b: Y% |) U# X: S1 u - let info = {
7 a* F5 p, P% }- o$ [/ D( v - ctx: ctx,
8 \ F7 F x" H/ G/ ^: V) U1 V/ ]* l `5 f - isTrain: false,
& D: T. ]* B8 o/ G; z9 [ - matrices: [mat],8 a: H* K9 Y4 \/ J$ \6 V3 ~
- texture: [400, 400],
6 J9 D, }) |$ Z" D; L - model: {
Z& H7 D" v$ c; M - renderType: "light",
. Z& w4 l9 M1 X* p7 q& H0 `2 S+ j6 [7 w - size: [1, 1],
7 B# F( H$ h/ j8 h6 p$ o! _ - uvSize: [1, 1]
?2 C* w' S' q& B/ T8 X8 H1 V - }( O- {/ ]1 k5 _% n. X: X0 ?
- }
$ s9 M4 K0 G! D( t) P - let f = new Face(info);5 n( t, A1 e4 N( j, e% v( c
- state.f = f;2 C# k) g- }# \; z
& ^) w( v9 A' ~- let t = f.texture;1 w* P8 @8 H; W5 b$ D2 V
- let g = t.graphics; W5 E3 l' o( ~2 e
- state.running = true;* {5 S; L: i {% C6 L& Q$ k# h
- let fps = 24;
- \- F4 s! a/ h. m! K) ~ - da(g);//绘制底图" U$ M/ @3 Q" q; O! G
- t.upload();9 l+ I* n- n; U1 L) k) @5 ?% i
- let k = 0;9 m% n( n: C9 n" d$ [! U, h @
- let ti = Date.now();2 M4 c# b1 v$ G, e4 W" b6 j
- let rt = 0;- X/ f2 a8 ~$ Z! A
- smooth = (k, v) => {// 平滑变化2 A( w' M' e; U; t/ X% o
- if (v > k) return k;9 |4 E0 r( k! `
- if (k < 0) return 0;6 c2 _' j4 u& i( N5 G& ?$ n- b
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
( @! L9 j6 S4 u! J) F - }
6 i6 u6 A, K8 g0 D - run = () => {// 新线程) s" V o# @5 f) a- Z: R
- let id = Thread.currentThread().getId();$ [) N- k1 ?7 j/ `
- print("Thread start:" + id);# P6 i2 f' q7 p8 S! ^7 f
- while (state.running) {
; [ D7 D- I, @. K2 l0 W - try {6 ^7 o% B& P& M0 ?5 h; |' I
- k += (Date.now() - ti) / 1000 * 0.2;
, K7 g0 P1 Q" A8 Y3 t" @ - ti = Date.now();7 d6 H+ k1 w. Q% M" a2 X
- if (k > 1.5) {' h! \$ m! F- F( D& m" ^
- k = 0;1 U$ D; u# T7 R( u0 B% |- n
- }
7 } R! d) a$ P8 s/ B# z - setComp(g, 1);' i" C* R5 \+ Z4 m
- da(g);
- ?- P) r. c! _9 Y6 T - let kk = smooth(1, k);//平滑切换透明度. Y4 d' B. z* e, {. F+ I
- setComp(g, kk);
% G9 r) v6 }* d9 ]; ~+ `' q3 m3 C1 d - db(g);
, J% l& B5 T2 s: M+ u% w - t.upload();0 \8 o1 S/ O" ?/ y# C
- ctx.setDebugInfo("rt" ,Date.now() - ti);8 g. D$ z3 o! T/ Q; @( F
- ctx.setDebugInfo("k", k);
7 S: Z& v/ y! \3 p' F - ctx.setDebugInfo("sm", kk);& I# ^8 U+ ~! D+ _$ d' K; D
- rt = Date.now() - ti;' [5 p7 W M$ ?9 K
- Thread.sleep(ck(rt - 1000 / fps));+ j/ H. s3 t7 P7 O* y7 s
- ctx.setDebugInfo("error", 0)
' C7 `6 K' }. ^8 M$ H1 Z5 R - } catch (e) {
6 _+ X0 P1 C2 t0 T - ctx.setDebugInfo("error", e);" A+ Y- A. \* U2 K" B' |
- }1 C& j8 Z3 S- K( j- A$ G5 ^2 u3 d
- }
" h! N& F0 b+ A7 n' O' A - print("Thread end:" + id);/ o: N. P; F4 T* d7 h
- }
+ r N$ e/ _+ x& e4 Y+ [, B - let th = new Thread(run, "qiehuan");& {+ K; h7 e% l: h
- th.start();+ K2 F/ Q2 H) z# ?
- }
( r# u6 O& y8 i - 9 u% |2 K( X* S" B
- function render(ctx, state, entity) { C) L& {* L5 I/ L
- state.f.tick();: L& W! ]& o, t3 I
- }
) `% j4 [0 k* G. N1 p9 ^! Q
- W" }1 t6 q G# o7 C- function dispose(ctx, state, entity) {
3 O. a$ g' g3 ?- E: J - print("Dispose");! N# b% g1 M- C( I
- state.running = false;
" ]' _7 A3 [' H1 A9 ]; [) g - state.f.close();$ g+ c7 V# S' {# W! E% y# T1 B
- }
% Q6 n" c" |* _1 h - . Q/ Q0 ?* I! C# l, A& V/ b
- function setComp(g, value) {; o$ ^) j1 Q' D
- g.setComposite(AlphaComposite.SrcOver.derive(value));
3 h, S6 X9 t; X5 J6 _% } { - }
复制代码
' Z6 y& Q3 k# K. N5 h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。" ~* s+ v6 ]- [' F# m/ z
" O" V: ^2 I; z6 ]+ C; a2 H9 [
& T3 H+ b; C4 l: H7 a) z x* A顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)+ p8 {3 L: p8 D/ p- }
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