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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。3 R; F/ @4 |. f, {% \3 V: F9 P* V
- importPackage (java.lang);8 A# i+ P' m6 G1 ` U& O Q" e1 ]( @
- importPackage (java.awt);( Q* F' T+ r& R. u# F4 P8 E1 H
1 n$ I! B6 g* S9 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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% y& S( \; k$ T0 r/ S! @* `- function getW(str, font) {
s2 g8 E. T6 n" n1 {4 X - let frc = Resources.getFontRenderContext();
+ Z0 k5 w- L' {# y" z - bounds = font.getStringBounds(str, frc);& p9 m8 Z/ x# b, _# Y$ q- G
- return Math.ceil(bounds.getWidth());
4 C/ P% s. k7 V* L" q - }
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- q9 z: e4 G" t3 U8 J- da = (g) => {//底图绘制
7 f9 ?2 ~4 S1 o) r1 q, O) a& | - g.setColor(Color.BLACK);
) @7 h5 @9 D2 G7 d - g.fillRect(0, 0, 400, 400);7 b b1 r& x& e. F$ B" y- y& n
- }$ e# e* B7 W' j( U9 Q& _
- ; ?( G8 ?" O7 P$ Y. z' j, g5 R. l
- db = (g) => {//上层绘制7 q$ y' q( p# Q5 v: e$ e) N0 s
- g.setColor(Color.WHITE);
- ~6 ?; C3 i0 v7 V - g.fillRect(0, 0, 400, 400);( C- m. [. q6 ~2 D
- g.setColor(Color.RED);. i$ q" e/ j. ~6 m, d1 f
- g.setFont(font0);: K5 e ?* f" [! [' F( z9 ?
- let str = "晴纱是男娘";0 |* a, Y; T) y6 h6 c4 _& r' K
- let ww = 400;5 j, W4 ^' Q/ ~1 P% _
- let w = getW(str, font0);
) R/ P @+ L. T" @& y; C - g.drawString(str, ww / 2 - w / 2, 200);' \# [, [6 P, `# i
- }
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+ `5 w! H1 Q9 M: u4 `: P- const mat = new Matrices();
3 y. `- a. S! U5 {; t+ w - mat.translate(0, 0.5, 0);0 A: ?1 t0 p g8 T3 }7 D# I5 V
- $ J7 U# C" P5 @! \+ b
- function create(ctx, state, entity) {
9 @6 q5 O' k; t3 | U - let info = {6 g" g9 K4 @1 P) A2 O; E
- ctx: ctx,: K& ]& D) O8 o* j4 d6 Y1 w- H& F, n
- isTrain: false,
^5 I- ~* S4 p v2 U8 ? - matrices: [mat],3 T4 V6 T* F! m7 |! N
- texture: [400, 400],
X) ~6 g$ `' g: F - model: {
" G4 l: L# u$ W! b; J9 B; U9 e - renderType: "light",4 ?: S+ ?# n6 B! E7 K
- size: [1, 1],% t3 n9 J/ j* n& S* s/ n4 [5 o0 V
- uvSize: [1, 1]
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- }2 Y- P, Q' a7 G! c) l* a
- let f = new Face(info);& y( z6 [/ K! Y$ b" B y* x- b
- state.f = f;
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* u& j( @0 a$ o6 E" p9 J" l- let t = f.texture;: y, X* B5 t6 q8 N) E
- let g = t.graphics;6 c7 A/ z X& a4 \& ?9 @5 y5 \ ?
- state.running = true;
6 q* D- B, l+ k9 m0 J r - let fps = 24;
( \7 E. x N$ P/ R% b6 }0 e1 e - da(g);//绘制底图
! B/ n0 e- R$ h3 H# n - t.upload();
& K, U$ |* x7 k: k* ]% V$ ~ - let k = 0; s& \# D6 W# P7 F; w- h' X& P
- let ti = Date.now();
2 @/ f& Q1 w: @ - let rt = 0;! d! V0 b% B0 m: q% ?: }
- smooth = (k, v) => {// 平滑变化
4 y Z1 X; J4 L% V, S8 Z, W - if (v > k) return k;
3 R# G; o; b+ r6 I+ A' F' q - if (k < 0) return 0;
$ [+ _% {3 [$ G2 h) S5 c$ R m - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;, U/ X# j2 M5 {/ V O" ~, x8 |
- }
5 H o% f A9 z6 E" H7 T - run = () => {// 新线程
& u% t& X( y3 V% N - let id = Thread.currentThread().getId();
$ P8 A: N& k$ ]0 n# m* U7 j- k/ T - print("Thread start:" + id);
8 U# ^9 L# S& C5 g% d" B* ^( q - while (state.running) {
0 n. ?9 w2 m; {/ V" f- \ - try {
4 s/ V9 d: k4 @1 H; D; ~! { - k += (Date.now() - ti) / 1000 * 0.2;
2 ^5 u/ S- q- S+ N, O; @* a5 u f - ti = Date.now();* z* X/ } ]9 |+ h P1 ^, Y
- if (k > 1.5) {
& W7 P# a& W( L4 K* ~ - k = 0;
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- setComp(g, 1);+ ?( _/ k, C4 F
- da(g);
8 E& f+ K" L( M: d9 [4 t% y* q L - let kk = smooth(1, k);//平滑切换透明度) m: P/ H7 ~8 p; {- {8 v
- setComp(g, kk);0 t r% X0 `1 h- n
- db(g);. i* O: l/ i+ T
- t.upload();
' T! o- U3 i R+ D8 w8 H - ctx.setDebugInfo("rt" ,Date.now() - ti);* s4 M3 Z; E) o1 b
- ctx.setDebugInfo("k", k);
* Z: B5 r$ f' J - ctx.setDebugInfo("sm", kk);( p+ n: ?6 p; G% f2 Q$ o4 P
- rt = Date.now() - ti;
9 E) [! _( {, T6 d' P8 a - Thread.sleep(ck(rt - 1000 / fps));
1 W8 d# [# d- a" \ - ctx.setDebugInfo("error", 0)
1 ?8 R- \/ N+ B- t - } catch (e) {& y, M( o0 s0 A) a8 l- ^
- ctx.setDebugInfo("error", e);
8 r* F5 J2 h- K( n. {5 E, t8 [" Q, O - }1 ]/ b) t" E* [& W$ {
- }! \3 U$ W. H w
- print("Thread end:" + id);+ s2 t0 i8 X' E
- }
b$ F1 q1 {5 V4 t4 l( C: ]8 G$ v - let th = new Thread(run, "qiehuan");
/ T5 k: e+ p9 J# Q4 }) V' E - th.start();
! w- s& l% d. m- m - }
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$ {! q) y/ L' n3 D4 _9 e- function render(ctx, state, entity) {
+ d6 Y( S3 R- f$ r - state.f.tick();
) U6 a. ^: [& }6 \! F - }
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: \+ f7 ?$ {; s& _/ g4 j- function dispose(ctx, state, entity) {
' {2 _# Z; ~, u: M- m% @) f& _ - print("Dispose");
: K) K; ^0 M" z - state.running = false;# Z, a/ |( J+ t; ~' H6 x% ?
- state.f.close();
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- % l) v) {" l: }: j' u
- function setComp(g, value) {/ f, G! n' [2 T
- g.setComposite(AlphaComposite.SrcOver.derive(value)); n1 z9 @2 x6 Q
- }
复制代码 5 T) f$ O2 C2 p- J2 c
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)) p1 h; X4 [' x9 e
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