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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 ]6 L9 v7 V. F$ F
- importPackage (java.lang);
/ ]9 m$ J; X3 K/ z" R - importPackage (java.awt);- l; ~" v) \9 K+ q$ Z: a! m
- q# x- f6 s: ^$ c# [5 G9 _% ^! R1 P- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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" J. @4 G% {7 }4 t2 Y& S- function getW(str, font) {
t; y; l. a: I& _ t - let frc = Resources.getFontRenderContext();6 t+ h! u3 p0 U. I; ~, ~ H& u; ?
- bounds = font.getStringBounds(str, frc);
0 l- q+ F) ~' U, d Q7 a - return Math.ceil(bounds.getWidth());9 d$ G, X7 {5 F. V, K6 v0 c4 E6 U0 y
- }9 V; I1 C0 J7 R# w6 N
' r; y1 ^9 q" t; j: C. t9 [: y- da = (g) => {//底图绘制 w" O$ w* e+ P/ q
- g.setColor(Color.BLACK);
4 Q$ R- Z7 v( i0 o3 k - g.fillRect(0, 0, 400, 400);
4 H4 m& ]: R! }* Y - }5 f7 ?( x8 M! J/ z; |& {8 I$ c7 D
) B- o, {; b0 t& O/ O! o- db = (g) => {//上层绘制/ U2 C4 K* n- b6 [, J+ v
- g.setColor(Color.WHITE);8 E" w3 _/ c" p5 ~* U1 {5 g1 ?1 y
- g.fillRect(0, 0, 400, 400);
5 a0 Y5 P: a _4 Y! z - g.setColor(Color.RED);6 @+ t1 L0 P+ J; N3 m/ w: ~
- g.setFont(font0);
+ b! D1 | w& @+ F - let str = "晴纱是男娘";
0 ^7 N, G; }$ t! l - let ww = 400;
# L+ g* F N' {6 B, f3 l - let w = getW(str, font0);
& u, ]2 m' R- b8 [* x& f$ N2 | - g.drawString(str, ww / 2 - w / 2, 200);
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- 5 E* \4 Z: m, @, U7 Z( |, v W
- const mat = new Matrices();
1 X& q- W- h) N, Y0 { - mat.translate(0, 0.5, 0);; t, x4 ~ Y& h7 |- S& B3 ^
- , g' n* I8 R& t% H: g
- function create(ctx, state, entity) {' U5 u, s; Q t/ K; h
- let info = {
4 c" T, n2 Y% K2 ? - ctx: ctx,
, r$ c# i% q6 L$ X2 R. z9 n - isTrain: false,$ I" ? D& d* W. E3 F# ^
- matrices: [mat],
- n2 L0 n) Z. Z6 i8 H - texture: [400, 400],+ x' T4 J4 O6 o5 V8 f8 A2 X) S
- model: {8 D# G3 z# E% z
- renderType: "light",
8 a) R5 U7 [* r1 R; M: G - size: [1, 1],
( }" ~# E w) A* v. c: r - uvSize: [1, 1]+ L6 ]# ?# g9 N% c1 [% p
- }
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- let f = new Face(info);2 M/ F; y' Y0 f# A# I( w
- state.f = f;/ r( Q2 J* Y, P) t
- ! ?- l0 v/ b! j( c- a, o
- let t = f.texture;
% Y! X1 M9 u h - let g = t.graphics;# X3 _" L. H& G" j) S
- state.running = true;2 b% f' e; v }7 o+ h* E6 x& B
- let fps = 24;
! V4 w( A" k# y8 x0 u! @ - da(g);//绘制底图
* M/ N3 u2 z' W" U# p - t.upload();
% B2 D8 n2 x- S1 X- l- g5 m - let k = 0;3 F$ m: b3 r7 C, q3 P9 S
- let ti = Date.now();
/ o6 \ _: h) O1 v" o+ V - let rt = 0;3 \) z7 E# d. X" m0 u& m$ {! F
- smooth = (k, v) => {// 平滑变化
) M. I: @2 W+ D" _) E* A; T - if (v > k) return k;
1 h2 ^0 S- {6 P( a# ]" x. b - if (k < 0) return 0;9 Y" ^: k; R0 |" O, ]
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! X- B0 }( R5 [ b - }
( Z6 g* X) Q. @. `7 q! v) \ - run = () => {// 新线程6 K. R7 N8 p2 a7 Z6 v! ~
- let id = Thread.currentThread().getId();: U) L& w0 T- k! ~. ]+ t2 R
- print("Thread start:" + id);
+ a2 S! I8 g4 k% c - while (state.running) {
. ]- U6 O& @ \; }/ V5 K* o$ [ - try {
) J" @% Z" E5 z - k += (Date.now() - ti) / 1000 * 0.2;/ k3 v" U, G( |
- ti = Date.now();
8 v3 f. ^/ V0 n# [8 Y. V - if (k > 1.5) {
; y6 n5 J- W; {1 N8 i0 V3 H - k = 0;3 _ Z3 |. I* i0 }1 G
- }
; N% k+ T7 S# r4 @# \) o - setComp(g, 1);
+ D1 i! J# \" l$ X3 P$ ? - da(g);2 W7 z. B: }* ?
- let kk = smooth(1, k);//平滑切换透明度
0 w4 D% V. X+ G - setComp(g, kk);# `5 J+ g7 T- e( L* n' @4 ^
- db(g);
y( m2 M/ Y6 N# a9 k* @: W% r - t.upload();8 i+ a/ K4 Y% o+ M) Q: Q4 R# m: m
- ctx.setDebugInfo("rt" ,Date.now() - ti);5 _+ ]. t4 ?. K( B
- ctx.setDebugInfo("k", k);
( q0 p6 |1 _( M. { - ctx.setDebugInfo("sm", kk);
( u2 B6 K+ I* |+ q4 w - rt = Date.now() - ti;
1 U& H' Y: l/ H! {9 a0 C( l - Thread.sleep(ck(rt - 1000 / fps));
8 X. M. Z v9 Y( ? - ctx.setDebugInfo("error", 0)
! O( _, ^; p+ j# b/ K2 A - } catch (e) {$ X, U9 B# h' v/ T/ b: [! w
- ctx.setDebugInfo("error", e);
$ N. j, U: r% w: h - }
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- print("Thread end:" + id);
4 \- d' C. |: c, U d - }; J( M2 r! b2 S( z# U+ c4 ]
- let th = new Thread(run, "qiehuan");
, d6 ~& T b9 {6 N0 q - th.start();
7 M( V" `0 `, o - }
6 v( ~' ^ `# i! b( Y
* R8 m/ @. ^% N' D- function render(ctx, state, entity) {
/ z$ ]8 Q G# T - state.f.tick();
* d- N) b. A% Q ]% { - }9 s) V5 i6 a! | _
2 ]9 f# r! L: `4 M- function dispose(ctx, state, entity) {
" W) h3 h* Z' v6 S; J U - print("Dispose");5 S7 ^, ]9 F: J! P
- state.running = false;
/ m: G7 T2 v9 b% U% H4 s6 _: D - state.f.close();( e8 f( @5 H3 n8 w, i
- }; e8 Y u4 w$ |3 I9 j
- n% y5 @* s( t* u( R
- function setComp(g, value) {5 z( }' R% m4 n
- g.setComposite(AlphaComposite.SrcOver.derive(value));$ f7 F& g1 q; W% _1 G7 y s# i) y
- }
复制代码 ; m/ G# l6 g& R/ S3 H+ V8 r8 d% I
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)3 \* H6 f) N) L% K3 L
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