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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。
' T/ u( a# |! x* f; ?5 h! @- importPackage (java.lang);$ y" l1 b7 V9 g
- importPackage (java.awt);" P) {) \4 x) I
; [4 ]# u* a' c) m- }% o9 q- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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]* Y' {% \4 M( s2 `5 T- function getW(str, font) {2 a; }3 a" K, }3 p( i: R4 N
- let frc = Resources.getFontRenderContext();5 @/ l6 i$ l9 W- s' F) A0 r& n" Q; a0 `1 K
- bounds = font.getStringBounds(str, frc);: W( B, ~2 P7 E% P( L
- return Math.ceil(bounds.getWidth());
9 h2 [2 G0 O; \+ l8 |! O - }
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# `& h( C3 _9 k/ ^) k( }# @- da = (g) => {//底图绘制8 y& N. m1 F4 V) x( X8 Z- E& O# Q
- g.setColor(Color.BLACK);; k2 @+ F$ _- S m
- g.fillRect(0, 0, 400, 400);
$ v4 I/ R6 x& m( D% D. c - }
/ ]* x& D; v% r0 c
* r# G( p7 L4 b- db = (g) => {//上层绘制2 F9 t# B! l, F4 x! O- O5 ]
- g.setColor(Color.WHITE);
A# [- a! e/ l' m1 t9 v3 Z }5 x+ @7 ]# e - g.fillRect(0, 0, 400, 400);; S+ K' m, }- u& d
- g.setColor(Color.RED);
, ?( _+ s6 i$ i - g.setFont(font0);
: Z0 ~' b* n8 A, L) M# g) p - let str = "晴纱是男娘";
2 E9 v9 a' ^5 d/ X2 _2 h6 ~ - let ww = 400;
( A# n% o' S/ h0 c; ~3 n$ U - let w = getW(str, font0);* X3 g( b$ R V4 K( o: S
- g.drawString(str, ww / 2 - w / 2, 200);' K/ J! x. K# k& O3 v4 d( F
- }
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- const mat = new Matrices();
. c* k: n6 R# k# K, Z2 P5 t7 e* A - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
: m! G5 j6 n Y/ o: k - let info = {8 b/ r+ S- `; [5 o% k& ~' t6 i
- ctx: ctx," z. ?- x# J7 J' U4 E6 w
- isTrain: false,8 _$ M1 Z2 ?4 l) q: Y- _
- matrices: [mat],
' `$ p+ E1 i& b# Q0 ` - texture: [400, 400],, K& |% h3 Q3 z u; K) q$ B6 Z
- model: {
8 f+ v6 }) J$ k$ X6 g - renderType: "light",
! ]2 L3 t) r+ A. a* {9 e! z - size: [1, 1],
. X2 z, [. _$ x. { - uvSize: [1, 1]
8 b& M" t+ L" o, H - }
. \4 ]8 V3 n- N: p% t7 e. j - }
' L. J+ }7 q& [; E" c6 S - let f = new Face(info);
, o4 J& ^8 U* `) ? - state.f = f;
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- let t = f.texture;1 t7 Q, K9 j+ v
- let g = t.graphics;% m8 p+ n# d6 m$ _
- state.running = true;
1 w* Z6 o! v( s$ v" T k7 P - let fps = 24;
+ m# }( S( m1 V) s- y, b8 r - da(g);//绘制底图$ i& m$ Y7 c- k" ^5 p
- t.upload();% F/ v' X# L8 s, Z# X
- let k = 0;( _3 }- Y0 D* B8 i: R/ v
- let ti = Date.now();/ c/ k! P: I3 ~" ~
- let rt = 0;& [, a2 ^! `( Z. r; J( t+ D9 }4 x
- smooth = (k, v) => {// 平滑变化
- Q. z9 M' |* M) b$ c) Q. } - if (v > k) return k; C3 X" f) j( k3 ~" d4 q, L
- if (k < 0) return 0;
6 n) s/ S9 U4 ^% a2 j' ~ s& H2 H - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;* Y! T. e4 \1 x5 x
- }' X, f$ q" |$ P& c1 V7 b" s
- run = () => {// 新线程
, G( O$ K1 }7 ^6 E2 z+ p - let id = Thread.currentThread().getId();8 U( f! Z* s+ c
- print("Thread start:" + id);
2 ]8 b; n/ x; t6 E7 e G/ i - while (state.running) {
6 }; X$ }6 C; z" I8 t, v; z - try {
" G3 y$ |! P: c - k += (Date.now() - ti) / 1000 * 0.2;
8 U2 n$ H4 G* r2 f8 E* c. C. k5 R - ti = Date.now();
: J1 q, x6 v- ]# s3 a - if (k > 1.5) {
9 c; |: W: _- D' p6 M( Y - k = 0;
; o/ W3 `! V# j" Q" v# F - }
7 g9 p1 r: V( ?1 i - setComp(g, 1);2 W2 ~. G0 @3 ]5 W8 O" |
- da(g);6 n5 y: f$ W' Z
- let kk = smooth(1, k);//平滑切换透明度" r3 p# k& v+ A
- setComp(g, kk);3 ~ j6 E5 {: k& n# W5 g
- db(g);% Y: {3 J* Y. A9 g5 ^& T# ?) M t
- t.upload();# |* j ?3 Y V7 f; x" A0 z
- ctx.setDebugInfo("rt" ,Date.now() - ti);2 T# W* o3 ~4 [( r5 W* x% u7 i
- ctx.setDebugInfo("k", k);8 d) j4 K/ D8 F% X, ^
- ctx.setDebugInfo("sm", kk);6 } Y8 `/ q* s! ]4 N2 v* V: M
- rt = Date.now() - ti;
+ A* [! S4 P7 V6 c { - Thread.sleep(ck(rt - 1000 / fps));& P9 h. u4 A$ Q8 Y5 S' e
- ctx.setDebugInfo("error", 0)3 o+ f" g) H7 N4 i4 y$ w
- } catch (e) {- q5 q4 s; y I) f1 F- l/ L
- ctx.setDebugInfo("error", e);
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- }
. C( l) v9 s8 v; f, P; @ - print("Thread end:" + id);6 L# D2 u6 R0 X% i& I" L3 O4 V5 W
- } T ~+ l3 H* _" @: d
- let th = new Thread(run, "qiehuan");8 u& K0 a$ x0 d; [, ?
- th.start();$ B' [, d; s9 p2 g2 W! \% h
- }
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% M' \3 \( ~# g4 K5 M$ C- h% _ W- function render(ctx, state, entity) {" J- l `! Y8 |" J' Z) T5 ], q$ T2 a& S
- state.f.tick(); u( r) r/ H$ d0 u" u( \; B
- }
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- function dispose(ctx, state, entity) {) H2 f1 i! U- r: f% E& \+ d
- print("Dispose");
. u- T+ E+ a# L$ h: }! N' ?! l - state.running = false;
" C! a, X" @) \ g6 y, K2 ~) s - state.f.close();
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; {% F& o0 e7 N! K% @# T- function setComp(g, value) {
; b2 G E2 k3 j- j4 s! {. p/ i - g.setComposite(AlphaComposite.SrcOver.derive(value));: z6 |$ v1 e0 X( {% X2 ]0 f6 G
- }
复制代码 ' w4 v/ O( z! ~; o) q
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。( ]8 _8 j( j+ o! b* m
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& y8 Z5 T! M9 d: K7 _$ L" l; k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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