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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。
: x* l) M* ~7 e0 h7 t- importPackage (java.lang);
) s& u" k1 U7 L' ~ - importPackage (java.awt);' |, i. Z1 V% C' w: t: T
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, q2 [: Q1 H9 t9 l5 `$ R/ i* e! |! p
- . O( ?! `" s; e9 n4 O% J; L3 p
- function getW(str, font) {+ J+ y/ {0 P% J) ?+ W
- let frc = Resources.getFontRenderContext();7 V7 R# F3 m& W/ N
- bounds = font.getStringBounds(str, frc);3 v* b' J; A1 f4 g8 H, L' L2 p
- return Math.ceil(bounds.getWidth());
; N6 d% ]" n5 I3 a" ~: U+ I& } - }
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2 p) H7 }1 Y5 n' G1 w% b- da = (g) => {//底图绘制
6 c( W+ {- Z3 p% q, V7 G - g.setColor(Color.BLACK);
1 X+ a7 i4 _8 V# L - g.fillRect(0, 0, 400, 400);/ W, ]) e7 ~* e+ o" e, v) `% e( [
- }; k; o8 v0 }9 O
- $ \. k) X# z# p
- db = (g) => {//上层绘制
6 Z8 W2 B: M! c5 } - g.setColor(Color.WHITE);. J9 w1 P# k- g2 D. i+ o, A
- g.fillRect(0, 0, 400, 400);
' L* l- u5 ?/ S5 S4 ^% @2 t9 V, m1 K& p - g.setColor(Color.RED);, `3 `5 l$ u# H$ `: L
- g.setFont(font0);
" _6 i7 a+ }0 K - let str = "晴纱是男娘";
6 o/ h7 u/ h1 }5 B - let ww = 400;
/ ?# C, V0 W) g; A0 I3 ^, V5 [% o - let w = getW(str, font0);- {, h" X7 }# I
- g.drawString(str, ww / 2 - w / 2, 200);- L( E" }" A, w6 n
- }
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% D, S' \. L3 w6 q+ ^4 M/ H2 g% |- const mat = new Matrices();
/ j3 B/ q+ F8 H1 ]/ i/ o) D - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
$ Y. T7 Y C' L: g1 A, s - let info = {
& `4 Y& G& i, \! V0 X+ F2 f - ctx: ctx,
' ?# a' y; x2 Y/ L0 c - isTrain: false,# t! B3 D! w: g
- matrices: [mat],/ a0 D* P! W3 O1 K- ^9 r* ^; y; T
- texture: [400, 400],
, L f$ P' U7 X6 i: _ - model: {* s7 T, l# O% A( B& `( X
- renderType: "light",
9 @8 {3 M& W6 z1 c - size: [1, 1],/ z% y2 v2 i! P! |3 n" r
- uvSize: [1, 1]1 A0 m8 x) {( M8 g
- }
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- let f = new Face(info);
9 F+ Z) s) l5 ?, y1 ] - state.f = f;
( z, J% Y3 G9 m: g+ }
8 \4 ~( f3 {3 H# H3 I- let t = f.texture;" d7 ^2 A y2 T+ w
- let g = t.graphics;1 C; ~9 }) k9 {( ^
- state.running = true;1 w6 O; i* O$ \, U0 s
- let fps = 24;
( L) l. Y: `' z& N/ o1 ~ - da(g);//绘制底图
& p Y% {$ I+ d - t.upload();
( O- v/ X8 F; j$ M- O$ C- t) E - let k = 0;$ v: }; w+ _6 y4 n' d
- let ti = Date.now();
9 \/ ]8 W( k9 F9 ~ - let rt = 0;
* c8 r: ^0 U8 d' O. l0 Q& o; K - smooth = (k, v) => {// 平滑变化! k4 K7 G& d, [8 L. W# {1 X
- if (v > k) return k;9 q2 S" G3 t: H J
- if (k < 0) return 0;
5 L: |# m) p1 U - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: F: ~! U/ r( X2 K" d
- }
% Y$ w0 k7 ~& w3 } - run = () => {// 新线程% v3 [/ w2 \' |6 u. c
- let id = Thread.currentThread().getId();
) O4 @# t8 b% y4 @& L2 u7 X - print("Thread start:" + id);
0 s) U- n* ]1 a' g5 P) _" m - while (state.running) {
$ n: q6 E' h( u H - try {4 C! R- J5 @; Y4 k9 I0 e6 U1 x# A
- k += (Date.now() - ti) / 1000 * 0.2;
& J7 Q+ D' q7 D. p+ `2 r - ti = Date.now();! n$ g G" u- h& {2 y( ]5 C, n5 H5 y
- if (k > 1.5) {% D0 J5 U4 U8 n
- k = 0;
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- setComp(g, 1);
" G K; }$ g) }+ c! g - da(g);: ?* l7 v8 }$ d
- let kk = smooth(1, k);//平滑切换透明度
' c% ^: D; q0 s2 `) r4 z4 t0 ? - setComp(g, kk);
4 l4 \- x: N) f$ A% J - db(g);) i& D- b' M7 ]3 o' Q) G* o
- t.upload();1 }7 N3 V4 n# q; x2 V# V
- ctx.setDebugInfo("rt" ,Date.now() - ti);: P& O1 W- z. I" I8 D+ ^
- ctx.setDebugInfo("k", k); ^9 d2 S* ]6 l c$ v
- ctx.setDebugInfo("sm", kk);
; x( z( i, u8 |/ e - rt = Date.now() - ti;
8 F5 X6 Q% Q/ S+ a% c# T - Thread.sleep(ck(rt - 1000 / fps));0 T$ a9 \, P1 n* l& @
- ctx.setDebugInfo("error", 0)
! A" L, J3 @3 y( o% d - } catch (e) {6 Y+ t% v1 D: o9 T
- ctx.setDebugInfo("error", e);
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- }. a# `, k& x: w/ }, \8 f# G2 F
- print("Thread end:" + id);4 p" m, A. d8 }' d/ y+ P
- }
7 H7 S+ m. a6 E- L - let th = new Thread(run, "qiehuan");+ p% J) [8 ]" r4 m Y* O* F
- th.start();/ e3 _. U& o8 v8 v8 J
- }
+ f/ [& [. N) Q* X) b+ N2 H+ l7 x - & A3 `7 A. [% H- G
- function render(ctx, state, entity) {5 u, a, e9 c5 n
- state.f.tick();
+ e" _) ]4 d2 { - }2 j+ T0 b" y8 E$ Q m" _* V
- & N+ g" Z: Q5 H8 Z6 m% v0 j7 R% z4 I
- function dispose(ctx, state, entity) {0 X" q- j$ S5 @$ b
- print("Dispose");& |% H% S* P2 K
- state.running = false;
0 q; u0 c6 Z" k& G4 O" A - state.f.close();2 q/ M4 ?6 y- h1 i; r
- }
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- function setComp(g, value) {
' {; m8 C. v7 S4 l1 p( N; _0 S6 M - g.setComposite(AlphaComposite.SrcOver.derive(value));
! x" v/ y$ M0 T- m - }
复制代码
9 D# m6 D8 D3 `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。- Z" ]0 |6 c d" o0 `: x
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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)0 U( ]9 J; U4 S
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