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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。
# m* d+ ]1 S5 w. q1 ?- importPackage (java.lang);
8 J( ~8 D# ?: ]2 z3 [# \ - importPackage (java.awt);; ^7 B$ i0 M" y! @. K
# h, z' Q: }/ z) H$ ?. X- include(Resources.id("mtrsteamloco:library/code/face.js"));3 J4 c0 F6 C. C& ]
. J! H; s& c) }$ G- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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, a6 e5 g8 P# A. v( r9 ]* {- function getW(str, font) {! u f) s3 E) r5 |4 ]2 X; `( c
- let frc = Resources.getFontRenderContext();
6 X6 i# g- {2 L2 j, u - bounds = font.getStringBounds(str, frc);5 Z1 \ p# I/ S0 S
- return Math.ceil(bounds.getWidth());2 X" Y' W& C5 t6 ?
- }4 e7 C. E5 E: S5 B& V
( Y. i1 [1 M% |- da = (g) => {//底图绘制
/ d( ~9 I1 m9 ~( b- U - g.setColor(Color.BLACK);
, W6 N ~( w! j3 [( I& I1 O6 u0 w, T - g.fillRect(0, 0, 400, 400);
9 [8 l9 @% E7 y7 S - }
# l! q! ^& ]( b$ f4 J: t* b - ; {) h* z X# l- |
- db = (g) => {//上层绘制* K- b& K- @5 p& ]! k: ~
- g.setColor(Color.WHITE);1 I+ D @# d8 V. t2 M. K+ V
- g.fillRect(0, 0, 400, 400);. v; B6 Y. [5 f# }
- g.setColor(Color.RED);4 ~' m# U: y% X6 j
- g.setFont(font0);
, P7 {# r: f: M1 a4 b* I/ k8 [1 i$ n+ N - let str = "晴纱是男娘";' ]! ]8 T& ~7 @8 I X3 A. v3 z0 p
- let ww = 400;& A% W# g4 d' ~$ E H- d4 ^
- let w = getW(str, font0);
7 w* ~" j* Y( G3 R3 [' R - g.drawString(str, ww / 2 - w / 2, 200);
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' s3 @; S2 X7 q5 L" x- const mat = new Matrices();: y7 r6 X4 P0 T a4 S! { ]
- mat.translate(0, 0.5, 0);0 A B2 L0 }- j. S+ a
- % ?4 w% m8 s8 I+ V5 {1 t% G
- function create(ctx, state, entity) {
$ \4 R. n; F, U8 n - let info = {
$ g1 [) g8 _6 [ - ctx: ctx,
O3 x" X- K/ k9 w: _1 C9 i - isTrain: false,, Y( j' k3 a- a* z
- matrices: [mat], k' V |9 F, ]% t) p2 E
- texture: [400, 400],
6 l; d2 b% R9 I5 C0 W - model: {) O1 M. J3 \- S! c* l
- renderType: "light",
- d' b" h' Q4 q! d* U5 P6 M; d( F - size: [1, 1],
2 `2 v/ g6 Q3 s2 s" g$ ?4 ^4 M - uvSize: [1, 1]- K6 d' S2 y7 E' `
- }0 a9 z/ p& t; u) z0 H0 i" q! I4 d
- }9 _4 O5 F$ u( ]& O
- let f = new Face(info);. g' D( v( T9 S! [$ r/ N: B% p
- state.f = f;
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) W3 F& K9 a7 l3 e6 A- ~- let t = f.texture;5 S5 Q0 e$ M, J5 R+ o
- let g = t.graphics;
0 v( _. ^& T6 t9 N - state.running = true;
2 `* m9 u6 M- c5 }9 g1 u - let fps = 24;
) y- z* Q: J* N8 y K1 k* T5 `, Q+ ~* R - da(g);//绘制底图
+ x/ {8 U. q) T( s, Y. ] - t.upload();
9 Z6 Y; N N* ~1 X8 `0 i( A6 ~" R - let k = 0;
* J8 P7 b8 t5 b; L - let ti = Date.now();
* m* y$ {( M- n# v - let rt = 0;$ A3 R& F6 K' m: C2 R1 F1 }
- smooth = (k, v) => {// 平滑变化
3 _( c0 `' o+ n/ K - if (v > k) return k;. X, ?, _9 m% B9 e% [
- if (k < 0) return 0;+ Q0 |, y: t! U, m
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程; C- ~6 }1 N/ V: p. U8 |
- let id = Thread.currentThread().getId();9 u8 A# x) |) U" `7 |! ^
- print("Thread start:" + id);2 g* g4 \, Y" ^
- while (state.running) {
. @' Q9 S0 _0 x2 w' L$ g - try {
' M% m, p% ?/ h7 d# ?# I - k += (Date.now() - ti) / 1000 * 0.2;% i3 Y' q; m2 R( t5 b2 q
- ti = Date.now();8 Z" ?" X2 s$ | e2 v9 \- M
- if (k > 1.5) {
1 L6 _7 b7 ]2 W. j6 Z" v6 f - k = 0;
. c" a" c9 g1 t0 i3 l9 u - }
9 x- s0 m" M' d& X5 ^! w& I4 a9 A3 L - setComp(g, 1);
# s, P+ e0 O( n! c* O - da(g);! p! e7 k- f* N
- let kk = smooth(1, k);//平滑切换透明度7 t/ E& Y+ ?0 Z
- setComp(g, kk);
. O l0 g; [2 M& c, N) f/ u/ _, O - db(g);% ^2 Q4 g4 N' p
- t.upload();
# w% W. k6 ~( I! @+ L( N% Y6 L - ctx.setDebugInfo("rt" ,Date.now() - ti);
3 L" Z; R5 W3 k% d8 O2 |2 e - ctx.setDebugInfo("k", k);
M3 [: i% [( B% g3 m/ O - ctx.setDebugInfo("sm", kk);
( V6 t; F6 D$ L2 c1 Q2 _: T - rt = Date.now() - ti;
2 p) j$ P7 X; [: ~: C% `1 \ - Thread.sleep(ck(rt - 1000 / fps));" s( a% `! W! e1 N+ F; a+ m
- ctx.setDebugInfo("error", 0)
* Z6 {) @/ y+ T. `% Q) u3 ^/ y - } catch (e) {$ a: j9 r3 r- T1 ?2 ?
- ctx.setDebugInfo("error", e);; V% F0 a' B& C' z2 q0 \
- }
b/ |, V' {( V9 X+ @9 f* E - }$ T3 T8 u+ M7 X, ~! f" m
- print("Thread end:" + id);! S# D0 }3 k- q
- }
3 y6 [. X& V. a( {2 c( C - let th = new Thread(run, "qiehuan");
+ P4 q/ I3 w" O% N6 n - th.start();
% ?* i$ | V" j, L* Y1 |% B, T - }
1 ?+ R5 t4 \% I# @ - 2 z, a5 E1 b m! S" Y
- function render(ctx, state, entity) {
. U6 o a5 e, T! Z - state.f.tick();& A* \$ f) e- O3 U8 q' E
- }
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" i$ s/ S8 R; w& O' ]5 `* F- function dispose(ctx, state, entity) {
: ^7 L- K5 f8 K - print("Dispose");
) f0 p* X. h( l: r* ~ - state.running = false;0 l( L2 N/ f$ ^
- state.f.close();4 \, o% K/ A2 I/ Z* t5 u
- }! O2 u8 n) S& e6 i% Z& B$ W
- 6 p0 _' H; A; G7 u, J& Q/ `7 W
- function setComp(g, value) {
5 E7 z0 I, o1 k. H6 R - g.setComposite(AlphaComposite.SrcOver.derive(value));
* g! X7 }0 L8 H1 y' u+ P3 h - }
复制代码
d% P/ ?3 q$ P# v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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4 Q, @% F% u7 T$ m0 W0 B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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