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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 h, e+ s* c( H3 |- importPackage (java.lang);
7 @* I$ ?1 Q# B* r1 F" q% f - importPackage (java.awt);( e1 |) v/ P3 @) R! p9 P3 v
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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# e& _! m9 [7 m% V' h- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- h) x J+ @& M- function getW(str, font) {, V; c! r/ t* U9 h3 u
- let frc = Resources.getFontRenderContext();! j7 H- z- s `
- bounds = font.getStringBounds(str, frc);5 J5 @; W2 k, ^0 G
- return Math.ceil(bounds.getWidth());4 C) k* D" U1 S4 n. [
- }3 z$ T# j* a! g4 k# K3 x
) t! P5 O; O% ~1 \5 p" p* D5 `- da = (g) => {//底图绘制8 `: w$ N- T- }1 M5 `
- g.setColor(Color.BLACK);
: a: \" d( S# {! \! p2 a - g.fillRect(0, 0, 400, 400);
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- " j: v2 A0 U( P
- db = (g) => {//上层绘制
1 r" s, U( w7 n - g.setColor(Color.WHITE);, A3 l o. t8 {4 Y6 U
- g.fillRect(0, 0, 400, 400);
* s6 N: }4 T" @, n& E% b2 u - g.setColor(Color.RED);
5 M" _+ b+ p, ^+ j* S - g.setFont(font0);1 f# z# s6 t# }4 R' t
- let str = "晴纱是男娘";+ x# l% e8 b! x$ E: J: X; R- w
- let ww = 400;
% {6 X1 I* W, k5 N* R9 Z - let w = getW(str, font0);
8 J# R5 f. L- }* t. T7 } - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();
$ \8 R, k+ }: ^# h+ ?- p, U5 G) r - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {2 R. e) G0 r5 \1 C9 X( f/ s
- let info = {7 g, |2 v6 ?& j9 P- N
- ctx: ctx,8 [+ o9 U+ D+ _/ [
- isTrain: false,6 Q# j! Z R3 a! g8 K
- matrices: [mat],8 ?2 ~6 V! h( n) a; r" `
- texture: [400, 400],
' h+ i% n- E9 r/ h w - model: {7 I2 p4 j& ?; ?2 z; c
- renderType: "light",
6 v7 c2 m- s. v - size: [1, 1],# _9 r5 i' k, M4 G* J1 J* U) Q
- uvSize: [1, 1]! j* E# ~$ O" V# M1 r; r( ~
- }
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- let f = new Face(info);$ l m% w/ \8 A3 z, J
- state.f = f;7 n* k. n- `8 M/ b, j$ d Y
- ) }/ x: s+ `, r% a1 n# D0 s3 q( t2 N
- let t = f.texture;
& i. r1 S" V, K6 f/ C$ J - let g = t.graphics;$ Z8 m4 ^! r* s! A6 s! H$ P' A
- state.running = true;' m3 ?* m! O4 O/ B& k
- let fps = 24;/ @" S- v* g' N# p+ s
- da(g);//绘制底图
6 [0 j: k; |# w7 a( R - t.upload();# K$ n! z/ d! e$ C' V' n
- let k = 0;+ ~7 f& _: F- n; Y8 I' V8 s& j
- let ti = Date.now();
/ |; b Z% Y1 k/ f( R# y. P8 U; ` - let rt = 0;
/ t6 X0 j0 P! M4 a# M( H! U& L - smooth = (k, v) => {// 平滑变化/ p. E* a/ {7 J* m! ]3 N$ \: Q4 z, q
- if (v > k) return k;
$ K- P& h5 S' e$ S& ~ - if (k < 0) return 0;7 u/ x' M' b& k, J! P0 t3 }
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
' o4 j( M6 m- t) p - let id = Thread.currentThread().getId();7 H m* f$ Y9 J" H- A- }
- print("Thread start:" + id);
+ q( p: Q( _; D9 Y7 z) U ]/ S - while (state.running) {- A8 l2 ^! m( d5 P, D% |0 h7 e
- try {
* Z* ~. P+ @$ J/ E - k += (Date.now() - ti) / 1000 * 0.2;) W( b* z6 P& |$ o: K- H3 R
- ti = Date.now();
: [6 c6 v2 d, k9 H- I - if (k > 1.5) {
1 A+ X& g5 D z7 k) Q P# n - k = 0;
$ t! i3 ]7 Q3 _7 S - }
3 ~( p5 b0 |1 l/ j: f6 N - setComp(g, 1);
! W/ W7 n6 G: b+ }; b - da(g);
+ ^& w5 u$ i; y9 X - let kk = smooth(1, k);//平滑切换透明度
# B! x9 Q0 O5 I5 ] - setComp(g, kk);8 ?0 Z2 @7 _9 l4 y* {
- db(g);
2 j+ _7 [. [( c0 H) o6 H - t.upload();
7 B) o: e2 F& E! q) z - ctx.setDebugInfo("rt" ,Date.now() - ti);& y( b$ Y7 c8 ~* G: m
- ctx.setDebugInfo("k", k);
( {; s+ `2 {* S! c0 D( b9 y2 y9 Z - ctx.setDebugInfo("sm", kk);
6 ?% |0 t, k! Q7 R5 V+ B - rt = Date.now() - ti;
& t4 r4 S/ e+ m4 G2 ?# G; W - Thread.sleep(ck(rt - 1000 / fps));# N% S7 C2 S! N' r* s5 _
- ctx.setDebugInfo("error", 0)7 i# B: w7 H0 `) z( o
- } catch (e) {& _# \/ l. E2 g) |
- ctx.setDebugInfo("error", e);
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- }/ H. O0 A# S+ r5 z/ }
- print("Thread end:" + id);+ O' h" F& S- R5 |8 I4 q C
- }+ Z8 D* d" @1 X7 O( s6 [, n; M. o2 o Z
- let th = new Thread(run, "qiehuan");; d# U) U1 r) i5 C t
- th.start();5 f6 R" {5 y& W8 ^& m
- }
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/ D- p3 i% K' o4 S- function render(ctx, state, entity) {3 C) R* u; W2 J( W$ O& w
- state.f.tick();
7 q, F4 y, | x5 f* I - }1 t3 E' G$ s3 W2 ]
9 Y2 I. w M, u7 ^- G- function dispose(ctx, state, entity) {
: R# H5 R- G( ` - print("Dispose");
) t% L3 x8 j3 R& [9 d# D/ D( r# Z1 Y - state.running = false;6 i. W# z$ ]0 J" x
- state.f.close();
; _2 }; W! \8 _/ }- z( J - }
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8 D/ y4 h+ ]5 \- W" ^1 `- function setComp(g, value) {2 c M3 J6 O6 I) J+ A+ P
- g.setComposite(AlphaComposite.SrcOver.derive(value));; \' A6 ?1 C$ C2 w, y$ p
- }
复制代码
) r- L" P; {" }: y) ?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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3 D2 B7 D0 o* m# ~( `0 r0 y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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