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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。: N9 R# ~( W2 `
- importPackage (java.lang);6 ?0 Z7 `6 r9 U: h2 k( k0 |
- importPackage (java.awt);
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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);1 g* e5 B0 X% s
$ Q; W5 C- |' H7 v- function getW(str, font) {
8 o9 S1 M! l% f, U, Q - let frc = Resources.getFontRenderContext();
5 q! p- l; Z; m4 _ - bounds = font.getStringBounds(str, frc);
1 Q" l" k: y4 {/ K( m - return Math.ceil(bounds.getWidth());) T! f0 E8 ]# h1 J9 ]0 d; ^
- }$ T/ j! V+ y$ z! @; W
! H+ ?# F [* N( z" o- u9 S- da = (g) => {//底图绘制
$ u& S( Z8 D3 s! C - g.setColor(Color.BLACK);
' F- _" }8 c. G. p' Z3 s3 A - g.fillRect(0, 0, 400, 400);5 m" G; m$ U, N2 A' o- S; F
- }! y0 e+ N2 w& _* K' U
- / W" [; q' Q% q6 `- ]3 P
- db = (g) => {//上层绘制9 x: r1 a. ^- K6 _4 S0 ^
- g.setColor(Color.WHITE);
; {* v- @8 ]- p2 F0 M! l: E) y - g.fillRect(0, 0, 400, 400);
1 l5 r. n' u# _ - g.setColor(Color.RED);
8 |( c: E% x& E: V - g.setFont(font0);
% x1 R3 O' b* m8 q3 g9 l8 S - let str = "晴纱是男娘";
, h0 Q: W) t5 ?( r - let ww = 400; E" m* w6 [# ~; f- G; ~
- let w = getW(str, font0);3 L6 f2 \# ~- q. p! [1 \
- g.drawString(str, ww / 2 - w / 2, 200);
; P$ d) g5 b+ u( B& K - }
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- const mat = new Matrices();( e0 n# |1 D; z0 c
- mat.translate(0, 0.5, 0);
' r9 ?" x4 K+ L6 |: h7 n" ]
% D+ S( q+ \. Z, G1 s8 b- function create(ctx, state, entity) {
4 l r. y7 v' b, r - let info = {
5 Y& Y( E1 ?0 b/ o, D - ctx: ctx,
5 Q. e9 }4 S O0 a' _ - isTrain: false,
. _- ]# ~: D1 [1 f& p - matrices: [mat],0 y' P; K7 F. U4 L& m+ {- c. q) M
- texture: [400, 400],
7 u5 f, O/ a r - model: {3 O) V5 }( Z9 V1 Z9 \ A
- renderType: "light",
( ^- ?0 {& ?# c5 l& b - size: [1, 1], T# H' C1 M" A0 J
- uvSize: [1, 1], g5 l% a$ B0 Z1 l0 P# l! f9 U9 \. @
- }
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- let f = new Face(info);
' W# q$ F* P2 ^ I7 U$ n/ B - state.f = f;2 U& F9 |! j( H; G* L
- 6 b! v, P# D7 F" P% c+ b
- let t = f.texture; Q* t V% R) r5 [) b9 F. W
- let g = t.graphics;: b! U; W( k1 F0 Q2 e' H- A2 s
- state.running = true;7 p1 `! p1 r: J% j o3 |
- let fps = 24;- }/ i' e! Q$ c$ Y5 [" p% k0 K8 S5 A
- da(g);//绘制底图' Q" K8 p- \! S$ o) M0 j
- t.upload();# L, r% O) W( j' @% j
- let k = 0;& t, q% [1 Y+ v. y3 T0 d
- let ti = Date.now();
; T* N' m1 q& ^1 E - let rt = 0;
- z9 T+ r1 a6 I" Y" P' ` - smooth = (k, v) => {// 平滑变化4 x# z& B4 ^8 M5 A+ \' @9 Q
- if (v > k) return k;
8 L$ f4 d+ m, `# l - if (k < 0) return 0;
9 I1 j0 y( D$ s2 \0 G - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
+ Q! \$ M* F7 B' H. \) K& o - let id = Thread.currentThread().getId();
6 H' z, p+ G5 s5 \4 I& V: k - print("Thread start:" + id);
5 D2 Z. B) m" _( A - while (state.running) {* m1 V5 t9 ^3 ^5 J Y7 W- C
- try {" D, [* |" x$ ]
- k += (Date.now() - ti) / 1000 * 0.2;6 _ N. I! p$ g' O' M
- ti = Date.now();
$ c C/ O5 K% R) o- } - if (k > 1.5) {1 P+ K% f' N: [
- k = 0;2 D8 H( K+ J( N9 g$ M* m7 D: q
- }% v9 z6 s z( c( }3 s
- setComp(g, 1);, C6 J- ^: c2 R$ d1 P d
- da(g);
5 L* T. D l% D- X- V- j) W% m - let kk = smooth(1, k);//平滑切换透明度6 ^0 H5 i3 W( E0 K) w% D
- setComp(g, kk);
/ r* a: g7 M! H. u - db(g);
% z3 Y6 l. x7 b! u - t.upload();5 P& v* z; ] q; \+ d+ ^" Y
- ctx.setDebugInfo("rt" ,Date.now() - ti);
( F6 x8 n" u4 N6 }5 Q7 b) V- _ - ctx.setDebugInfo("k", k);3 i: N3 Z6 |* g
- ctx.setDebugInfo("sm", kk);' ^3 f: F- M6 k. V& N" W" ?
- rt = Date.now() - ti;; ^ t+ S' a. U0 K5 U) u
- Thread.sleep(ck(rt - 1000 / fps));
5 A! |3 ~9 z' t" |! [- B - ctx.setDebugInfo("error", 0)1 n4 I& z: R" e A! z- P
- } catch (e) {
1 k2 H5 M. s; S; i7 s& E7 ? - ctx.setDebugInfo("error", e);
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- }( k+ }2 g( M! T0 G: K. T1 U8 d
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");/ \# [. H/ @6 I/ u
- th.start();
9 R" H- T* B- R3 v7 \( f - }
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- function render(ctx, state, entity) {' M: }1 c" \7 Q9 W! E
- state.f.tick();) p! }: h8 _: }4 Z) l
- }6 k8 q$ N9 u% J
5 V8 R9 g2 E0 {+ @- function dispose(ctx, state, entity) {/ _/ O$ l0 @) s
- print("Dispose");
6 H+ m D9 S9 N6 g7 e, @ - state.running = false;
; m) `( q3 x4 U6 S# V2 i - state.f.close();8 t: Z' [+ b" _+ W2 S; C2 K
- }& c# a2 ^0 G$ x, L; N
; @* W+ x# V$ Q h- function setComp(g, value) {9 `/ b' x9 y) c I" a" ?
- g.setComposite(AlphaComposite.SrcOver.derive(value));
' F% {) B% S% j8 Z - }
复制代码 # [$ p4 W1 }5 z$ O' S
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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