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1 v+ a/ Q- C) \+ x% i' g, E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。
, x( \. I5 B8 ^. K: T. I+ Y' k- importPackage (java.lang);- l8 S1 H8 M0 x: \$ s7 {) y
- importPackage (java.awt);5 D) M1 d. _. R5 `
- / q6 H1 S. {9 n; }8 ]
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);$ H5 v4 b$ K* _4 P
2 p# F( t" N# |: e1 r! B- function getW(str, font) {" i8 y3 l3 y1 V3 Q9 e1 W
- let frc = Resources.getFontRenderContext();
" V) K0 @7 e- J1 b/ o8 Q; x( v, _% @ - bounds = font.getStringBounds(str, frc);3 V' y# ?2 S; i5 }" s+ a
- return Math.ceil(bounds.getWidth());# R" b, @4 l9 e( w! b3 ]( X
- }) i9 E3 [# ?& U W1 g
- 3 M- d. M: ]) [5 S- m) W+ o3 m
- da = (g) => {//底图绘制2 d8 q9 r+ z0 I, n
- g.setColor(Color.BLACK);6 S0 i9 |7 x# K6 Y M+ p
- g.fillRect(0, 0, 400, 400);) O% ^8 o3 d* I) o1 ]
- }9 A2 Z X1 f3 y5 `) J7 w, D: n- |+ h
' M% L& B" C8 W- db = (g) => {//上层绘制1 t8 N7 x8 V/ x- u
- g.setColor(Color.WHITE);
7 Z8 Q9 L x( V2 C# ~2 l* a - g.fillRect(0, 0, 400, 400);* z4 q4 d7 T D$ Y
- g.setColor(Color.RED);
3 [# @8 Z" s2 T - g.setFont(font0);! g1 \ D( ]1 f+ U2 Q# @; `
- let str = "晴纱是男娘";( `- r$ S" ?6 ]2 `) @" }- l
- let ww = 400;& j# E% ~0 ^+ U+ S$ h9 ^+ { a( R
- let w = getW(str, font0);8 `* Q: E4 b4 U G, h
- g.drawString(str, ww / 2 - w / 2, 200);% B* H: m1 @0 k
- }
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- const mat = new Matrices();- B( u2 N* o+ |. }6 R4 ]* P/ z! z
- mat.translate(0, 0.5, 0); ^2 z0 S/ ~( @ Q. G0 n
- # b* { O4 G6 R2 A9 f+ S: h
- function create(ctx, state, entity) {
4 v, W( |: q8 D1 R% Y% d - let info = {
8 |: P$ U- \4 a8 d& N& c$ j - ctx: ctx,5 S* y; {/ D0 [( X
- isTrain: false,+ X3 N. |/ }; j
- matrices: [mat],; M8 G K2 M/ j. y1 K$ c* X
- texture: [400, 400],
3 j( \; B0 x. U, n - model: {+ q$ l3 S" W7 J
- renderType: "light",1 `( V( I& T9 |
- size: [1, 1],
. n% C2 I# J. U6 ]& b- P* |# v. Y/ z - uvSize: [1, 1]
+ h$ O5 b% ?4 K - }
G* T$ t( O' `; U) N - }
1 I# j2 F3 B0 i# {: n - let f = new Face(info);$ R: c. P' S5 I9 x. G0 b
- state.f = f;
, d# U$ R$ T7 S* Z D
1 {# P" ~, V0 ?; e- let t = f.texture;6 H5 w' q% G: z4 D) H
- let g = t.graphics;! f* @1 B: U7 d: O: [6 J
- state.running = true;6 g# n. G5 x' m5 O7 v7 N
- let fps = 24;
) N& t+ z, \5 S7 W - da(g);//绘制底图
9 ^5 `7 A5 n& O9 K' L( R' s2 w9 a - t.upload();$ t8 I1 n% x8 L: u9 w8 u
- let k = 0;
7 s7 U& K0 @6 ^ q) I" @$ E4 ` - let ti = Date.now();
9 K: R3 H8 m0 `! b& ? - let rt = 0;
" v/ X( o( s [, F- i( u - smooth = (k, v) => {// 平滑变化
, h: m7 X, l; y - if (v > k) return k;
+ R ]; m P) s- V* N2 K, `6 j - if (k < 0) return 0;
1 c; e& s+ ~: P6 r - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
3 ]( {' V2 @. P( r - }; t7 D# e4 z4 F* x t8 J
- run = () => {// 新线程
$ P" h! Q/ M8 X; k, t - let id = Thread.currentThread().getId();% ~6 N7 ?. ?. f4 Z' C$ r" M! T+ Y
- print("Thread start:" + id);0 v) ?4 p7 F/ u2 n% ]% N4 I9 u
- while (state.running) {
6 u+ ~! ~' i- ?% T - try {( R5 m/ }$ j0 v3 f1 G4 R
- k += (Date.now() - ti) / 1000 * 0.2;+ W# i' x2 g |. n
- ti = Date.now();8 }8 H/ a$ i) J
- if (k > 1.5) {6 I( ?# k% Y; s T9 u
- k = 0;0 [; z9 |& g# A: l2 c9 [
- }
% n. }8 o7 u1 ^# i( n! | - setComp(g, 1);
1 F* r2 p9 n5 P1 B - da(g);3 e* Z: `5 Y0 y: [" U
- let kk = smooth(1, k);//平滑切换透明度0 |+ {! I1 _ ?% g! p% g
- setComp(g, kk);5 z+ w& \' P- L: Q
- db(g);* y# Y5 O* R% p0 O
- t.upload();. w9 w5 i& i6 s" ~- ]
- ctx.setDebugInfo("rt" ,Date.now() - ti);
9 w* a( T1 ?# O" J5 G7 W1 P/ K/ P - ctx.setDebugInfo("k", k);4 x, ^6 R$ \' \' r2 {
- ctx.setDebugInfo("sm", kk);
' R3 E H3 t$ U8 d: [ - rt = Date.now() - ti;
- d4 J7 \: h ^ ?' c4 G0 V - Thread.sleep(ck(rt - 1000 / fps));
* A5 ?% `0 F, W- y; d* Q0 m - ctx.setDebugInfo("error", 0)# G. x- A D" W3 {+ q1 M
- } catch (e) {4 B: y) x' \ t: \( y
- ctx.setDebugInfo("error", e);
% u0 E: f7 {! p3 `1 s - }' F' {; O0 |6 K+ s# L: @+ S3 R2 |. n
- }
% i _5 _& \7 s. U- [ - print("Thread end:" + id);2 ]8 t2 Z7 W. y$ U" u3 Z
- }+ u1 I) b) k/ Z! x- C# U
- let th = new Thread(run, "qiehuan");
6 ~/ [: L/ m4 }( F5 W/ r" ?/ L7 K6 T - th.start();0 c6 a" y( J5 _0 d/ s8 [
- }0 c: w3 w9 [9 y% Z
- + r/ Z& Y6 _/ n1 y- l/ k3 C
- function render(ctx, state, entity) {5 M6 A6 R& \ X8 [2 H7 O
- state.f.tick(); V9 O8 j: t1 I6 S* n
- }
# O- M+ ]+ m# ?$ z: H - & w+ {' R' r- s
- function dispose(ctx, state, entity) {
- o: }: Y5 y5 S* f - print("Dispose");9 O- e: Y& ]( R( X# [& S" }& l
- state.running = false;
, n y' \, m) l( m& A2 D- ` - state.f.close();8 h+ `* ]& u" o3 {
- }( T% z" Y' n) W, {* p3 K8 Q. Z+ l
- ) B/ Q! F: K9 ^( |7 `2 `
- function setComp(g, value) {# V; w9 U, h" o, s4 z0 }
- g.setComposite(AlphaComposite.SrcOver.derive(value));
1 a6 V& I9 E: C/ f7 t: |1 u: @3 N - }
复制代码
7 U! `5 v( _# K( I+ w& o8 p$ H3 V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)$ I' j0 U& G+ ~% R7 |4 |
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