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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。
5 w) @0 z$ \7 l. O& @2 E& W- importPackage (java.lang);
8 q& \3 `- n1 R - importPackage (java.awt);
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* S6 h3 n- L" I9 M- include(Resources.id("mtrsteamloco:library/code/face.js"));- A+ V2 G& G" j* ]. s
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. z3 j' F6 ?2 ~% Z( ~
- + g* Y8 C M, M
- function getW(str, font) {/ `' _2 `6 _. @% H( x
- let frc = Resources.getFontRenderContext();) ^8 q7 U6 u( d# D6 ^
- bounds = font.getStringBounds(str, frc);
B* k/ z& t2 J/ o - return Math.ceil(bounds.getWidth());, _! X8 I, ^8 i$ w# g+ m
- }
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4 `- h$ `0 @' E2 D- da = (g) => {//底图绘制8 G$ c( H4 ~! l$ Q/ N* k
- g.setColor(Color.BLACK);# G( r+ e* j) x7 T/ B- q
- g.fillRect(0, 0, 400, 400);: E' `) }. H( G4 b t
- }
: c7 w( |3 X) U/ X3 r! s - 8 T9 B2 k: \* ^+ d! \+ x- {
- db = (g) => {//上层绘制, [) M( h) f1 R" ?0 P$ o
- g.setColor(Color.WHITE);
- y8 Y+ `4 K+ L+ _: b# q - g.fillRect(0, 0, 400, 400);5 ]% \( p; r3 l: q( O1 c7 w% C6 Y
- g.setColor(Color.RED); _- x; A' y+ T+ Y' u
- g.setFont(font0);
$ v# w: X! @% `) ^4 I* ~% F/ k% Q" K - let str = "晴纱是男娘";5 O$ e* I# I1 U9 K. ~" C/ M
- let ww = 400;
" a) b# G8 Z- b# L1 z; h% {) W - let w = getW(str, font0);
( J4 x. l; P9 j - g.drawString(str, ww / 2 - w / 2, 200); O; r3 G6 M! ~ M# |# K- d
- }
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- const mat = new Matrices();$ {* r# j% k& ~0 n& K
- mat.translate(0, 0.5, 0);- z! N' ^# i, Y
- ! W" B5 H7 w6 h9 G" ^, @
- function create(ctx, state, entity) { e, \: ]4 e5 `! h8 V& Q3 g3 P
- let info = {8 o+ D1 u; `0 ]: _$ W' o
- ctx: ctx,
' a1 Z& i" A/ e* |8 v - isTrain: false,8 F+ Q. U$ F# M, `
- matrices: [mat],1 R! o5 u b3 x6 h9 j- b
- texture: [400, 400],
! M( }! n9 M5 ` - model: {
& u; `- P. P. u2 Z( _4 w L - renderType: "light",
& X2 ]8 u/ y5 c8 c7 j5 } - size: [1, 1],1 u) ~+ B$ ?3 v
- uvSize: [1, 1]
& M1 v l3 Z& J% A( Y) _ - }
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- let f = new Face(info);" B" X9 P6 V$ F6 z' ~& `
- state.f = f;* D! A- s4 y! G( ^. Q$ ?
D. q( W' ~& @3 a' @& I+ D5 z }; x- let t = f.texture;
/ a3 h+ t9 g; L: z8 f Q5 c - let g = t.graphics;1 G: R0 D, B8 N0 `) W
- state.running = true;
5 s/ \1 j; n& Y' G! I& E) Q - let fps = 24;
2 ?4 k: g$ E- o+ {) U3 c - da(g);//绘制底图1 e. p" P* a2 o7 c% _
- t.upload();- E9 p. `, Q' b2 p4 R( R7 H0 c
- let k = 0;
" C2 k% H; F5 x. h% k - let ti = Date.now();
& M! n7 \& N0 _# _4 J - let rt = 0;9 K0 T+ U M3 \, U& ]
- smooth = (k, v) => {// 平滑变化
& Z- G( p/ J7 a" `, J$ e - if (v > k) return k;; f& V. C; i+ c- y+ a$ B( u# Q
- if (k < 0) return 0;& }7 ~' f" ?: K% Z) Y$ b3 Z# y
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
5 {, n j4 m6 i - }. N! j4 z7 D" ]( l0 [' ^
- run = () => {// 新线程
% n6 m/ T J1 G/ ?8 p, ` - let id = Thread.currentThread().getId();. P* C8 ^; z( K" Q, v5 u
- print("Thread start:" + id);
. k; R! J _5 r) l W; r+ c5 ? - while (state.running) {
) E7 }, f" Q+ r+ i: J5 h9 |2 B% n - try { v! t ^3 ~5 ]3 J
- k += (Date.now() - ti) / 1000 * 0.2;
' R- p% R* A% q - ti = Date.now();/ }' H" s. o7 X. Q1 O
- if (k > 1.5) {( i# S, b# F6 y( X( G( q( M' M r
- k = 0;
% V$ c$ g! M: ^# k) Y! z, v - }
/ j- H2 m6 F+ F4 m - setComp(g, 1);
9 O/ j# c# w% P) {. {5 F - da(g);3 H2 H. K9 H- V7 R3 [: m1 O2 ~
- let kk = smooth(1, k);//平滑切换透明度
/ y8 C2 Y: t! d8 m - setComp(g, kk);
0 l( Z+ q5 ~8 R2 A+ w" Y - db(g);
* N" S- K% } D" S0 i7 r S5 C - t.upload();6 b: H/ K1 \* ]! t' C# p ^
- ctx.setDebugInfo("rt" ,Date.now() - ti);/ d1 Y/ T$ Y. ~& F; X
- ctx.setDebugInfo("k", k);$ a. V3 h" `, O8 \ E6 b
- ctx.setDebugInfo("sm", kk);' N8 M4 M( D' U: l4 N
- rt = Date.now() - ti;
@" g4 e4 n# L2 B - Thread.sleep(ck(rt - 1000 / fps));
5 `7 T A8 I" g9 p/ y - ctx.setDebugInfo("error", 0)% E& X0 o, R# N& c2 ^
- } catch (e) {
& V$ @4 J; S" s, a* q) r" [+ M - ctx.setDebugInfo("error", e);
1 {- y9 L, U' U2 W/ p - }) e( {+ r; i8 c, R* b, m* V+ H7 k
- }( j2 r' h# ^0 d4 d& t$ x6 c; E
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
6 w/ M5 ^' E8 J" t7 i - th.start();
3 y% f. v8 I& g: ^6 e) s2 U - }
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- function render(ctx, state, entity) {4 r2 e l! X) y
- state.f.tick();
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- : }; {& E' U0 \+ Q2 `% Q" `
- function dispose(ctx, state, entity) {
+ u9 M. V0 G" k* P5 E* D - print("Dispose"); g4 G; T$ ]3 s
- state.running = false;) O- f" N L" l' i1 I4 T
- state.f.close();
; [" k9 s- T9 B1 B6 X - }
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- function setComp(g, value) {1 S' U! n% B4 E. W
- g.setComposite(AlphaComposite.SrcOver.derive(value));
3 H4 I' B8 h0 ?7 ?8 a7 X% l - }
复制代码 + _; f; `6 j+ Y, Y: 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)
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