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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。! `9 L2 }2 Z+ X/ B4 W
- importPackage (java.lang);
7 F3 G* f. |* f( L - importPackage (java.awt);2 n5 E2 s) _+ o- ~8 x
1 U# d" q- T4 j. G1 c- include(Resources.id("mtrsteamloco:library/code/face.js"));; B, Q0 S% q. \" Z4 @
7 W! O8 T7 q, j7 [4 U$ j" t$ c0 B/ o! Y- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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" S4 j$ q; k9 |# y& y& W2 _( ^- function getW(str, font) {) v) z( n6 `9 W7 m7 E
- let frc = Resources.getFontRenderContext();
* _3 m y% R9 z5 c; N1 h- d - bounds = font.getStringBounds(str, frc);
% Y7 b+ o5 r4 V% @ U7 N - return Math.ceil(bounds.getWidth());
- {7 `3 E6 `7 T% b6 O2 ` - }
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8 P3 K8 n Q5 ^- da = (g) => {//底图绘制! z9 ~% M2 O7 u/ z2 {0 H9 G
- g.setColor(Color.BLACK);& V( Q. G. i8 N: J
- g.fillRect(0, 0, 400, 400);
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$ m7 m/ O5 A- K, E8 p- db = (g) => {//上层绘制
( f; j; f$ x# O - g.setColor(Color.WHITE);
: e7 H0 {* O+ t5 [% ~" U - g.fillRect(0, 0, 400, 400);
( q# J, R5 h8 z" M3 F1 p" j; o1 M - g.setColor(Color.RED);$ i. d8 W* s% F
- g.setFont(font0);4 ]5 B. z( x3 n$ v' [# g. ^ z
- let str = "晴纱是男娘";
5 v5 @% {$ Y9 |* E% e6 g { - let ww = 400;
. Q* l- [# g5 V6 ` t - let w = getW(str, font0);
7 G: [1 _! f. j! `- Z) ? - g.drawString(str, ww / 2 - w / 2, 200);6 P! {# ] n( D' W. ~4 c' H
- }
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- const mat = new Matrices();3 n* L' W% E' W( E
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
5 j2 K+ S- c" t) n2 ~% Z, A - let info = {
9 D y, u& m# A/ ]" r7 r! q$ D - ctx: ctx,
( I- G3 U5 R* r% C7 U - isTrain: false,# d8 z! m# i9 z0 d
- matrices: [mat],
1 O5 r7 _( a t3 U# G/ C% f" ` - texture: [400, 400],; v) t# u H* v; r5 u! q* y7 L$ E" _
- model: {7 s' P2 k5 O# |, C6 ]% Y3 l
- renderType: "light",
( w( e3 S- H" {+ d - size: [1, 1],9 T; |$ o$ @0 f% ?, [0 Z/ u, y
- uvSize: [1, 1]8 k! n9 C! a6 y% N, q0 m
- }
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- let f = new Face(info);
( n9 a5 W8 v/ s+ d% a" W - state.f = f;6 `/ z, r0 f0 [5 T
- 6 A9 e9 u0 y7 p% V) [) f: O" a( G2 O
- let t = f.texture;
* s( c: q* `1 F7 h. _! s - let g = t.graphics;
+ I2 Z2 C, I- M. G9 Y - state.running = true;3 b# v+ r% _+ b* ^
- let fps = 24;
$ q- u$ J" N# P/ K - da(g);//绘制底图0 S5 S7 m6 Y% o( }9 _5 h, ]% g4 T; |4 }
- t.upload();+ z9 U8 l6 `/ b& N3 N9 X9 a$ Z8 S6 T
- let k = 0;
4 \: D- L& j ~' N+ }6 K+ x3 F8 D - let ti = Date.now();
$ y7 I9 V- f( ?& p6 H- q1 k+ V4 s/ e - let rt = 0;
_2 H* O2 k; o5 ]$ g$ F* M - smooth = (k, v) => {// 平滑变化
% M" t- H, y, I/ k9 n - if (v > k) return k;, @" _9 [$ A% ^' C1 z
- if (k < 0) return 0;
: H' c( b$ l- `; v - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
5 B' l2 `% C2 N0 T - let id = Thread.currentThread().getId();
. ^7 d( R' r- s - print("Thread start:" + id);+ J( I7 ?9 L2 Z
- while (state.running) {
& s. Z4 Q6 O0 v$ L% ] - try {1 K- Z" Q3 d2 j' |8 R
- k += (Date.now() - ti) / 1000 * 0.2;; p* `. e) k7 }& @- q8 `7 L; y) J0 o
- ti = Date.now();- x. z! g8 O9 o' a; N
- if (k > 1.5) {9 f3 s& F! i% Q( y$ y3 `) G+ F% Q) C
- k = 0;
: S% Y2 s: T. C7 D/ v - }
% A3 m( c& K' l8 c) v5 S - setComp(g, 1);, W; T) C; j4 g* C1 s/ F1 j
- da(g);6 l- Q- t% P. o+ n8 n* S, s" q
- let kk = smooth(1, k);//平滑切换透明度( f! I+ j( Y& ?, g8 Z; l' Q2 P2 T
- setComp(g, kk);) M5 }3 X2 Q) _
- db(g);; f! h& y, s/ N3 r
- t.upload();
5 ?+ R; X+ ]8 z( c @& T/ e# U9 e - ctx.setDebugInfo("rt" ,Date.now() - ti);2 s e. x6 m) {# M. g9 G5 c
- ctx.setDebugInfo("k", k);
6 b# Z6 A% `! z+ z - ctx.setDebugInfo("sm", kk);3 a! z6 D8 @: j: z( ~; B7 k, Z9 L
- rt = Date.now() - ti;: a) ], G2 \, N6 q* c9 x
- Thread.sleep(ck(rt - 1000 / fps));6 b% ]3 r: ]! E) n* U
- ctx.setDebugInfo("error", 0)5 I: x' p7 y5 X) g' u; i% n
- } catch (e) {" ^/ a% v P4 @* c* W* `
- ctx.setDebugInfo("error", e);
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- }: B2 ^8 ^8 v! v
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
- U) J( Y0 g. z* M - th.start();% M( k. j; a0 x
- }
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6 M9 @$ P" D2 Z+ l8 z+ q6 F- function render(ctx, state, entity) {' E9 Y. {: j0 ?! D- E# D: S l: U
- state.f.tick();
1 _9 w% D) J( D - }
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* O8 z6 r2 b+ m, k4 x- function dispose(ctx, state, entity) {1 x, x( b, @% u. l8 E+ t2 Q+ }& I- I
- print("Dispose");" D4 q Q2 m' @' d9 a, V
- state.running = false;% e( b/ |5 H, i7 m) p/ C% v( |1 d/ V
- state.f.close();/ m1 k3 g+ ]8 l: i5 y" L
- }; A/ o0 `7 L3 ^2 x. |
- * A" U3 t! T/ W m
- function setComp(g, value) {. C; S, T# t* v4 Z; b, X6 N
- g.setComposite(AlphaComposite.SrcOver.derive(value));
9 v" E( w* [7 X6 |' e- C - }
复制代码
* \1 u2 {& C+ w" W2 G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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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)! B% e" Y" R; O, X
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