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* t- ^ h$ n- O- u1 e' j( S5 I, s3 n: V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。
( j1 }4 a: p2 y1 J0 `5 Q: Z( f- importPackage (java.lang);
# O: [1 F% b I( H. Z4 L# A9 l - importPackage (java.awt); z- V( `, o f" C2 q
6 E. I, ]1 e8 Y& N' L% Y5 x- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. a8 a2 G3 C) J3 Y
$ b Z: ?: t9 {; y- function getW(str, font) {$ y6 K5 P9 L/ k# h& [
- let frc = Resources.getFontRenderContext();# j8 m' B* Q3 f5 F
- bounds = font.getStringBounds(str, frc);) X6 D/ L0 F( f7 `
- return Math.ceil(bounds.getWidth());
# O4 _5 V! a! ^1 R; L5 V7 a - }
. `) J1 G) ~8 G* h: k( X
# i: z3 J/ m/ `# D; N, z- da = (g) => {//底图绘制( a9 K* L4 z" |# v6 q0 \# v
- g.setColor(Color.BLACK);
5 m/ g$ c$ v5 k' f' h4 t) o4 q# d5 ] - g.fillRect(0, 0, 400, 400);) S+ o5 V2 {: y7 ?1 Q
- }4 w0 a. J9 G E, S6 n
- - P r; P* H3 Y" R# }
- db = (g) => {//上层绘制, w8 S6 n# g6 k+ H. W% R" n
- g.setColor(Color.WHITE);
( x, L2 `) D# i& o - g.fillRect(0, 0, 400, 400);
4 H1 g1 [6 z2 c* t9 G1 S: D0 J - g.setColor(Color.RED);
! o# f- }, Y& x$ `: d' _ - g.setFont(font0);
0 C/ o. C( R+ R# r# Y, E6 j - let str = "晴纱是男娘";
+ N+ K: n( J/ p3 A5 ~ - let ww = 400;, x p: P. L9 |* e& A) }
- let w = getW(str, font0);& O4 c1 k! }8 T3 e' w. G
- g.drawString(str, ww / 2 - w / 2, 200);
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$ A% x* ^2 z4 P: P4 K9 Z% O- const mat = new Matrices();$ R3 N' {4 v7 L2 d( V* M; `: m M
- mat.translate(0, 0.5, 0);: c0 g, T: B, K! \% i
K- F3 f5 O, t( H- function create(ctx, state, entity) {% t$ S5 q A2 @1 O- C
- let info = {
# P5 w) s8 w. L% Z& o1 H - ctx: ctx,; f; P) X7 n, ~3 r! g: }* ^- J
- isTrain: false,8 \% \4 X0 ^+ Z2 I6 O2 o$ |5 I
- matrices: [mat],
. e, {) t/ A/ |6 K - texture: [400, 400], H. \+ D' w: N t/ |$ o; o
- model: {( M: }! W( _5 m: Q' E
- renderType: "light",) G+ \: n& V8 `- N2 }
- size: [1, 1],
. d& Q% p# y- I - uvSize: [1, 1]
6 L( t8 Y% y" e* C' U3 R - }
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- let f = new Face(info);
* I+ r/ h5 ^5 v - state.f = f;
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0 S/ \/ V4 f; ^( \4 O- let t = f.texture;0 l. m) V/ r# L
- let g = t.graphics;
- e( [* f3 o! y. L/ j" Q - state.running = true;4 ?7 h+ A: x+ {4 \% \. I$ u
- let fps = 24;0 }& y8 E! |4 r
- da(g);//绘制底图
: Q- i. G1 ^6 A+ _9 ^( r: C - t.upload();6 \: ?( X$ z* L
- let k = 0;) L& c5 p* G5 u
- let ti = Date.now();0 ?, o; o0 z/ B
- let rt = 0;
+ ^7 E% }, }; a7 ]( U - smooth = (k, v) => {// 平滑变化9 m( j; @, ?/ w1 n( c# }
- if (v > k) return k;' I% r7 ]( x, R5 t$ \' Z
- if (k < 0) return 0;. C+ a. w: ^1 O& m$ t1 }) s
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
- `) {6 i. J0 \# y3 g; ` - }
% C2 s8 d0 X) |, w& q - run = () => {// 新线程0 H- l" g4 }( ^4 G o
- let id = Thread.currentThread().getId();
& E g6 ^* m& A: y - print("Thread start:" + id);! w Z3 F4 _) X
- while (state.running) {: z( O D o5 h) i0 ~2 u6 Q. w% q
- try {6 b# p: m1 b" s
- k += (Date.now() - ti) / 1000 * 0.2;
/ H `# i( z" N, Y8 [4 c - ti = Date.now();
; T& b" P' K9 w' P2 y! P - if (k > 1.5) {# z! ]) g6 m3 t* ]
- k = 0;0 P; Y- j; C& \7 D% D
- }0 @: K! t- @/ u
- setComp(g, 1);
% @5 p8 |+ ~0 ?4 Y4 S - da(g);
; O7 Q8 X% X+ Q }1 B. ~4 u - let kk = smooth(1, k);//平滑切换透明度
5 [8 [) |/ d% m9 ]8 W/ Y2 Z - setComp(g, kk);
. i" l1 l) L; m* K* z+ b4 a. F/ ` - db(g);8 v+ T3 G0 J- P( ~+ c# C, Y
- t.upload();
. R8 N- k* e0 l- ]0 ~: t - ctx.setDebugInfo("rt" ,Date.now() - ti);: _; ~* M) x" d+ j7 E( m2 S
- ctx.setDebugInfo("k", k);9 F: `# R+ c- J# w2 d
- ctx.setDebugInfo("sm", kk);
$ O7 e" \4 I/ |8 a+ l/ l - rt = Date.now() - ti;
; I. ]( B @5 T1 u - Thread.sleep(ck(rt - 1000 / fps));( _$ r* R! F; q1 H% b( x
- ctx.setDebugInfo("error", 0)8 c, a0 X, U/ ?/ H
- } catch (e) {
- @+ p4 O5 s9 n' P! t - ctx.setDebugInfo("error", e);; \/ q7 ]9 k0 q0 {) ~. A w0 u) L
- }
; {! g' W# k" o7 ]8 S - }
8 W, H9 Q4 Q1 o) y* H - print("Thread end:" + id);6 i& `3 O$ C$ _ @ m0 x3 A' F
- }
6 n7 u+ ~# q. x. b5 G - let th = new Thread(run, "qiehuan");
+ C" C. j- f- k4 ]; X - th.start();3 g7 y4 t o3 y: `3 Y
- }/ J& v _, L/ d7 J. d, G& N
/ }% F; W2 s4 e4 W. D- function render(ctx, state, entity) {- [9 q0 n: N9 @8 i2 ^$ v) Y) m8 C
- state.f.tick();0 D- s* Y) N1 {
- }; M& L& M w+ q9 v
- 6 N2 `% s' r, P* O! Y$ w* ^. N1 R
- function dispose(ctx, state, entity) {
5 t7 |/ G1 j, Z - print("Dispose");4 \ v8 D# K1 u0 K5 c# ?- O' A! q
- state.running = false;3 i7 X$ G; W3 g6 z+ p& y7 e' Y1 E
- state.f.close();
0 D" p, J" |$ a* A3 J - }
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- function setComp(g, value) {, u. @3 p1 W. U2 N& V* T) e7 |
- g.setComposite(AlphaComposite.SrcOver.derive(value));, }4 h1 N a: V& g
- }
复制代码
5 V# t5 k( d& ^' ?' B& q& @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。
, }/ c$ B8 A( N' i7 f, m- ?7 z3 H" @3 M4 A( h
' L# }% [+ `, }( ~+ N" u% R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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