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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。
, d/ w; K6 W2 `6 r9 K- importPackage (java.lang);
$ z1 \0 T1 L6 r4 r# ~% g5 p% } - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));& R) x( L" h2 v" H$ d
. [0 [) ^, T4 j! S, O3 L- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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: g. G+ H+ }1 D6 B- function getW(str, font) {+ x' |% z& V2 i/ {
- let frc = Resources.getFontRenderContext();
6 ~' m; K# w) J% C# y - bounds = font.getStringBounds(str, frc);
1 j6 V5 }$ {2 N; q; o - return Math.ceil(bounds.getWidth());
. u8 Y2 {; q G4 u( m - }5 M/ y7 S* A7 @
3 a% G. e, P* z$ e- da = (g) => {//底图绘制: P6 U4 z% R# w7 C" S# g1 v
- g.setColor(Color.BLACK);
/ J8 s" ?5 G2 r" M, \4 l - g.fillRect(0, 0, 400, 400);
9 Y% S$ q; c! e - }
+ `1 ^) d. M9 P+ h1 h v: A2 h - 4 |+ @* O S E0 X
- db = (g) => {//上层绘制
' |; |9 O/ q+ h' O; C+ w - g.setColor(Color.WHITE);
0 @: ~1 G+ r3 X/ U - g.fillRect(0, 0, 400, 400);
. T- d/ V: B }$ \' W - g.setColor(Color.RED);
8 B+ q3 }4 E+ C: \ - g.setFont(font0);9 R- O* C7 L+ W- H) b8 E' i
- let str = "晴纱是男娘";# E7 g+ }9 R, z; C. u
- let ww = 400;
' a8 v# K4 S1 w8 V I - let w = getW(str, font0);" R' ^+ N+ u; u8 [! j& |
- g.drawString(str, ww / 2 - w / 2, 200);
2 y* a7 ?+ ` s7 a& x - }
3 ?' |" `+ L5 p8 k" k& L7 { y - - q; Z& d U7 W2 N& X* {
- const mat = new Matrices();0 t9 F) H+ `9 U0 j0 z: K3 Y' C
- mat.translate(0, 0.5, 0);- z+ C" ?% Z/ R& {" g! K7 J
- ! ^) w6 Q/ ?# f$ y# Z
- function create(ctx, state, entity) {& O0 [, b1 N) M2 d! I0 v
- let info = {
, B' g9 t& Y6 \( B* v; u7 U - ctx: ctx,4 f( x4 j9 f- a' M3 R
- isTrain: false,
; q7 v+ l8 _' s - matrices: [mat],
5 H1 H, N/ l7 x3 d6 @, G - texture: [400, 400],3 e0 @7 @& u- Z! U" W
- model: {2 Z& M2 [7 X: x! `. c; o
- renderType: "light",6 D3 X+ d* f0 l7 L ]$ a
- size: [1, 1],' V6 l: @# G5 }
- uvSize: [1, 1]" ~; H3 C3 F9 E0 a! H+ M
- }0 [* _5 M/ ^! [- z8 b
- }; p! ~" s* x. S; ^% }4 t# b
- let f = new Face(info);
; j/ _+ i$ K G5 @9 w - state.f = f;* [6 F% J$ q; Q$ d
- " f Q% }2 z) S/ @; ]7 O
- let t = f.texture;
2 n" i5 A' T- E) s6 W! q/ }" [4 u, M - let g = t.graphics;
3 O0 ~5 K/ J* T2 E7 x3 S0 S - state.running = true;/ [8 b$ X( x& k3 n1 u
- let fps = 24;1 \3 m3 G Q" o# b, _2 r
- da(g);//绘制底图% @+ Y. R1 d W. |# I( R9 x( [
- t.upload();
# x) H3 r- ^2 A! F - let k = 0;
! X$ O; O/ W$ z* S/ [; E - let ti = Date.now();
8 B2 z6 a' z# H8 \4 h9 }1 `3 `+ p - let rt = 0;
, H! c- i+ p$ b; N8 \ - smooth = (k, v) => {// 平滑变化
8 ?! o( X# l. U* }9 O M( {$ F9 E - if (v > k) return k;
& [* q$ ~: R$ B8 e3 d& _ - if (k < 0) return 0;
# j6 A. N" h1 ], i8 V- e - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;' _; I: _, d7 z+ l
- }
* [# N4 a* [6 n+ q - run = () => {// 新线程! F5 m# y0 o' I1 G+ ?5 j* d$ P
- let id = Thread.currentThread().getId();8 Q7 R1 i6 O2 ]; ~/ @
- print("Thread start:" + id);; b+ F8 }6 d9 y( I: Q
- while (state.running) {
3 i$ @! x Y$ ]; Q/ { - try {
0 `6 S% X" v. n. M* f - k += (Date.now() - ti) / 1000 * 0.2;8 h0 T: |9 x8 h7 S
- ti = Date.now();
9 p, ~' ^6 A ?9 \- } - if (k > 1.5) {
/ W% N" u5 G. \$ A/ m - k = 0;1 `7 K6 z- F) k4 U) p$ n U
- }! Y, \8 l% Z* l1 Q8 R9 O
- setComp(g, 1);/ {! ~! s! E0 M7 p/ x1 [5 x
- da(g);
! n/ t+ a) D* I - let kk = smooth(1, k);//平滑切换透明度+ k, O' L3 ]7 A3 A1 c3 ?! o- _
- setComp(g, kk);, R+ A( [: Z4 S
- db(g);
$ `% x: q* D2 D1 i - t.upload();. Q( V$ Y$ G% V! C% F, G* q
- ctx.setDebugInfo("rt" ,Date.now() - ti);
) Y* L$ G3 M3 D/ U5 I" K - ctx.setDebugInfo("k", k);
; H! ]5 d/ E& Y& v, P* p6 n - ctx.setDebugInfo("sm", kk);
1 s6 U/ Q. ~6 ` K% a( o2 q5 N* n - rt = Date.now() - ti; K; R$ A; p. K( W2 w5 B8 ^
- Thread.sleep(ck(rt - 1000 / fps));. h% V6 G4 @+ g: H6 i5 z
- ctx.setDebugInfo("error", 0)
6 X# x: S- I4 Q% _# H: W - } catch (e) {' K } v; Q* a8 i* b, w
- ctx.setDebugInfo("error", e);
9 l2 A/ v _ @+ K# ]8 t8 C( } - }
+ t1 W; K* }0 q; s" C# c - }; P5 t! W; K5 d
- print("Thread end:" + id);" k& g. E# `; r" m9 m2 P
- }) U- n* K$ f& g" m- F$ h- p4 @
- let th = new Thread(run, "qiehuan");, A& l; w/ }8 B! e! I) N
- th.start();
4 p* U5 A1 W) {( L - }1 G \9 U1 a4 x, P, y; Y; U
- ]. y; _5 Y# k9 D( [8 D
- function render(ctx, state, entity) {
5 F7 S ~% B; A/ Q, R - state.f.tick();- w: |* v4 Q# G. P0 a1 y8 J) P* ]
- }
/ E9 r& u: D6 f
' _ k H5 _& ?- function dispose(ctx, state, entity) {4 h! K9 P+ I3 c1 `' p
- print("Dispose");
. }! [( N2 @$ s6 X- Y2 H - state.running = false;
4 |0 E8 P1 x9 ~7 ^6 O4 Z6 q - state.f.close();
5 V! ^! h* b1 m5 k" I - }, G' v( m! Y. p& _
- * e0 B4 X C& Y7 F0 B/ }
- function setComp(g, value) {- V# k0 S; ]* X5 c7 {1 V2 R
- g.setComposite(AlphaComposite.SrcOver.derive(value));+ [. U+ y$ ^; a9 D1 Z
- }
复制代码 0 q+ W7 [; T1 ^3 k+ z8 X! ]
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)
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