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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。0 }" ]9 S7 F( L
- importPackage (java.lang);9 K* J. p0 ]8 V+ ~
- importPackage (java.awt);( J4 q& r- o, w! |6 T+ ~
- . |2 ^! _6 u/ ]. V! q+ k5 {( j, [
- 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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* v x3 @0 J2 I/ `- function getW(str, font) {! X3 ]. F x9 z* S' }! Q9 B
- let frc = Resources.getFontRenderContext();& Q( ^0 D; K% A; d1 [' g6 C/ {6 q
- bounds = font.getStringBounds(str, frc);
$ c' H; m% v7 V8 K% |" A - return Math.ceil(bounds.getWidth());
7 V& ~; Z) B. s7 Y/ H - }
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- da = (g) => {//底图绘制
/ g/ I0 E7 s* G1 y8 F- k - g.setColor(Color.BLACK);
; R) g, X7 T2 P8 Y7 | - g.fillRect(0, 0, 400, 400);0 N- X/ {% A8 Y/ n
- }9 l4 l. p0 n& W$ h
* E1 d% }! o P3 U/ ^9 c- db = (g) => {//上层绘制7 [2 S7 }. p$ v# o7 x0 a' ?
- g.setColor(Color.WHITE);4 d3 g4 i' i* h3 k
- g.fillRect(0, 0, 400, 400);
# T7 F, `5 n! f5 a - g.setColor(Color.RED);
: a0 P" K% M4 a9 o+ p. x" K+ `4 | - g.setFont(font0);# \9 x, @, W2 Y3 K/ ?' O2 O& `
- let str = "晴纱是男娘";: `/ \' L2 Z9 G- ?6 ?
- let ww = 400;
% @% s6 }+ D4 O! x - let w = getW(str, font0);
# U. Z2 C5 I( e! Y; W - g.drawString(str, ww / 2 - w / 2, 200);
* ]" ]& j9 O( }1 I2 U - }
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- const mat = new Matrices();# ~ @8 e$ {' l+ G
- mat.translate(0, 0.5, 0);+ C$ S! E' I# B( P M( b, ?
- 1 Y( b6 h7 w/ O2 k! V
- function create(ctx, state, entity) {( X+ W g m+ y D$ X6 a* @. g8 m
- let info = {
3 F. w$ u( Z( L# { - ctx: ctx,7 ^. r) i9 H4 Q% x7 R
- isTrain: false,
( S4 c, m. j) i! P( j% } - matrices: [mat],0 T0 M/ O+ U0 c- d
- texture: [400, 400],
% C6 @6 Z, a+ t; z! C1 T, r - model: {
V( T* G( w- t/ Z - renderType: "light",( @; H: ^: C+ P2 F
- size: [1, 1],( e$ `# x8 l" w' u8 M" k( B
- uvSize: [1, 1]+ }8 N3 k3 V* y+ a0 U: X7 Z
- }
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- let f = new Face(info);/ q; K% y* [6 O* o: ~
- state.f = f;' u8 b( R9 {4 D+ Q/ u' o. @( ]7 C
6 E8 h0 O7 F! [" m! h- let t = f.texture;
0 v& V- e) s3 _9 C9 p - let g = t.graphics;0 d' ^: e6 D4 L( g
- state.running = true;* k0 b$ B# w# m: y& X* _* C9 I& N* h
- let fps = 24;
: x" d" [0 `8 }9 c; E5 f - da(g);//绘制底图
7 N: c. Y5 ^6 ?/ g2 U2 c8 T2 v - t.upload();+ Y& M, N7 d5 d2 G3 E
- let k = 0;# Z* f* U) W; i1 w
- let ti = Date.now();$ K/ P$ V) x6 v8 i" m. h- L
- let rt = 0;
& j9 K% l8 v" a. Z& ?$ t - smooth = (k, v) => {// 平滑变化
3 E6 t6 l# k1 }) ^$ O7 ~2 z" M4 S! a - if (v > k) return k;
" X' v7 c' I) y8 r7 A( p: ~ - if (k < 0) return 0;
) z, H9 }. _9 j: V( S - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;* i, [+ h# v% D' Z' M
- }: m3 q, m3 Z+ ^* A$ {7 Q) c q8 l
- run = () => {// 新线程
2 E8 h/ [" o8 F+ U$ [5 x0 B - let id = Thread.currentThread().getId();
6 S# E) |9 C* F* G7 l - print("Thread start:" + id);! n5 g) l1 l4 J: M
- while (state.running) {+ Q4 l; Z; n/ [: h6 A1 u5 i9 `9 v
- try {
$ }3 {0 x7 d8 y8 W - k += (Date.now() - ti) / 1000 * 0.2;1 G( \+ m: O; v4 N$ ^" s! p4 r5 u
- ti = Date.now();9 U( g: {% Y( g6 z+ U1 a. L. w
- if (k > 1.5) {2 u0 {% Y; C9 Y6 O( _# v6 x
- k = 0;, O. I: n( f% |3 b" ^/ y
- }% W; H" E: z- y% s
- setComp(g, 1);9 I0 t& ]+ r- R
- da(g);
' v. C) f0 m& P3 D, w9 r! e - let kk = smooth(1, k);//平滑切换透明度8 f i) C- O* Q* {1 P5 V
- setComp(g, kk);
5 c9 N( O1 F% n# i' T8 z - db(g);! C& b* |( `- C. g) i
- t.upload();0 c( O/ P0 l4 f% T, o
- ctx.setDebugInfo("rt" ,Date.now() - ti);
& e9 v3 ]4 e: j3 ] - ctx.setDebugInfo("k", k);. X( R3 I1 t% C+ u {2 a3 ]$ Y2 ] ?
- ctx.setDebugInfo("sm", kk);- c5 l/ o/ E( c0 n( f. u: a* o9 K! w
- rt = Date.now() - ti;
% X1 K, A9 l7 n0 }" Z& b/ k - Thread.sleep(ck(rt - 1000 / fps));
' B& I' V! H( x, j$ d/ \ - ctx.setDebugInfo("error", 0)
- d; L: x( K0 s: d' k( Z9 z( |. | - } catch (e) {- L7 }. R: U, B. ]7 {
- ctx.setDebugInfo("error", e);0 s! E$ y' K9 o9 i8 k5 {
- }/ {2 A6 Y9 j6 T# I, h
- }, Y, n7 Z' y+ l) V
- print("Thread end:" + id);+ _) b# f6 U- `5 o* w
- }# R S( K8 Q8 ?) n, v
- let th = new Thread(run, "qiehuan");, F- u1 v2 R# I6 h
- th.start();/ F O1 B; q8 `1 Y6 N
- }
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- function render(ctx, state, entity) {, a8 Y2 C5 Z' b
- state.f.tick();
$ }# g) [% o/ a& v) M* D* G' ~ - }
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4 y% {! O. S8 ^: ]! Q: I- function dispose(ctx, state, entity) {
. Y( f) [- ^9 h0 | - print("Dispose");
8 {/ I4 Z9 ^; r# j - state.running = false;
5 I7 Z; n* R! h! e" Y - state.f.close();, @% d6 F1 N/ U4 ^% H3 w
- }: F- y' V3 d2 @* W! e3 X, @
- / @* A3 D- ]; P6 }4 M0 X% l
- function setComp(g, value) {: E0 I, J2 o9 J# q* Y8 E/ T
- g.setComposite(AlphaComposite.SrcOver.derive(value));
/ B5 J6 g2 m8 P+ e6 R5 Z - }
复制代码 ! E0 O) ]1 p1 H; E
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。$ O. h( v+ \2 m4 M& r
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9 W6 h9 M! A. ^% T, E$ n/ S顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)& V8 q' o7 h' i) D9 h
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