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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。
! _% L7 I, o+ x% D! a- importPackage (java.lang);. B2 y- S3 `( }" Q9 c& d
- importPackage (java.awt);: v5 }2 \8 E0 n N
- & M, A+ _4 K- M0 P9 G
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);* o k: Q }0 M; Z' ]6 O. r: b
- 9 c( O% P* A6 s' Q6 g
- function getW(str, font) {
) J! K( k' T7 @: I& `0 t - let frc = Resources.getFontRenderContext();, u! C7 x1 ^4 x$ J4 n9 }; ^
- bounds = font.getStringBounds(str, frc);( I4 V5 ~5 Z% d$ i) R
- return Math.ceil(bounds.getWidth());
: N2 c! i) S/ h; N - }( [7 ]6 c4 }7 j) @/ P) e( k. N& i) z) V1 K
- ; L7 J9 H, u" s. }9 ^2 ^
- da = (g) => {//底图绘制
1 v( Y4 s* {+ }5 }8 O - g.setColor(Color.BLACK);- U# s9 y- o8 ^+ a
- g.fillRect(0, 0, 400, 400);6 e6 i6 B2 J( h
- }! R/ {0 w/ v8 O( [( F2 P. r4 F
- " F2 z. A. r/ g9 e+ {7 Y7 v. g
- db = (g) => {//上层绘制
# Q$ d% b' C h/ R$ n, n. z/ L - g.setColor(Color.WHITE);
6 \; G% k/ O! c& q* I8 C - g.fillRect(0, 0, 400, 400);
' Y: I3 g& L1 A8 s% ` j0 | - g.setColor(Color.RED);
, K% v& ?1 Q2 Q* g1 ^8 f - g.setFont(font0);
' c4 N2 A) W8 L' O' G, ^( r - let str = "晴纱是男娘";: L( h9 S8 V; p& I( l
- let ww = 400;' B" |* }: g& X+ z( d
- let w = getW(str, font0);* A' F( h8 i2 Z
- g.drawString(str, ww / 2 - w / 2, 200);$ s( ^0 J% w8 D- ~2 {; N2 R; ~
- }/ t3 G N& z2 u9 m- M
1 }% A# u, p/ E$ S2 @1 v- const mat = new Matrices();
' X+ k4 l: ^) w+ k4 _, T+ N9 `2 R - mat.translate(0, 0.5, 0);
0 @( _: t% y7 U$ { - 7 B7 ?/ B5 T+ u( F* |5 g
- function create(ctx, state, entity) {8 l8 c) T' l: S: f
- let info = {! o+ a& S. T. G; \7 T n# q
- ctx: ctx,$ a+ j2 v4 i4 I2 K x0 [
- isTrain: false,
/ d4 M. `5 Y: K3 C* V% m - matrices: [mat],
- @+ `2 T" b( v+ g; y! b3 } - texture: [400, 400]," Q, D; @' Y) U# L
- model: {' i9 u& X' M- ^* n0 ?
- renderType: "light",/ `. a0 |2 a, u* q( s/ ~5 n
- size: [1, 1],
, O- x# }9 g2 v9 Y - uvSize: [1, 1]
# k5 P, A3 T2 H/ ]0 x - }8 i* l# j9 N4 o. I
- }
4 S9 N; n! Z" L7 b# p' K. [6 A - let f = new Face(info);
" j# c1 p; |" G) X# |1 u5 [9 M - state.f = f;6 J& y p" _: }+ v
- 8 X" c; M+ f& r& [1 z# L" ^( Z
- let t = f.texture;7 X# H; r; @9 G5 ~
- let g = t.graphics;& E9 ^1 x1 Y2 z
- state.running = true;
* I1 m3 N+ x( }3 j# n/ _ - let fps = 24;4 d9 Q. r E [, }8 }" W. r
- da(g);//绘制底图. c( m3 R( Q/ b7 G- J: b
- t.upload(); D. ^' @7 Z+ E" Q6 n0 P* i
- let k = 0;3 P( V! C4 i$ A) m0 \9 V
- let ti = Date.now();
7 q, E$ I( N, q - let rt = 0;
) l, H, L8 i. A$ z" f - smooth = (k, v) => {// 平滑变化
& t6 t/ T' ^ ^2 u; M6 N% y. `& G - if (v > k) return k;
: |8 n+ d! ]' E% q - if (k < 0) return 0;
9 i% f y# F. W8 t8 T - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* t% [7 F |6 h X; p5 x - }
6 {; {3 \0 Z k4 Y( \4 g9 R/ Q1 B - run = () => {// 新线程) c+ J7 T( h9 [6 {* K0 ~. h( s
- let id = Thread.currentThread().getId();
3 F( v4 |* g3 Z5 [" J - print("Thread start:" + id);, ~2 L7 f* d1 o) ^& R
- while (state.running) {+ o4 o5 r( ]: F8 k4 p6 k
- try {
! w6 Z& a' A8 G3 X - k += (Date.now() - ti) / 1000 * 0.2;; \. F4 f5 T& ]. h. q2 |
- ti = Date.now();
. n( l7 |$ s4 _' B - if (k > 1.5) {
O6 \4 Y* q1 }$ z& E - k = 0;/ Z0 ?+ S3 U7 u! s
- }& D9 k" o8 g# d6 i, a2 r* B
- setComp(g, 1);
- ~1 ~& Z- [- z* y6 M1 a6 `$ T - da(g);
* B1 k6 a. T$ ? V1 [( t: q; o - let kk = smooth(1, k);//平滑切换透明度6 X& `4 v+ Q" A+ E9 y8 s% k$ A1 b
- setComp(g, kk);
: T( z7 `# V( N2 r1 `' v2 s9 n - db(g);7 F" u u; `2 `' O
- t.upload();
S* @- x: `& g* c1 T* s' \ - ctx.setDebugInfo("rt" ,Date.now() - ti);. e& c3 p1 I9 k3 l9 j
- ctx.setDebugInfo("k", k);
+ W3 Q F3 Q" l9 t& C - ctx.setDebugInfo("sm", kk);
3 S9 L, z. M) s - rt = Date.now() - ti; [6 g) [$ _2 D1 a9 K5 A2 c5 z
- Thread.sleep(ck(rt - 1000 / fps));
# f- @* f0 H. _ - ctx.setDebugInfo("error", 0)( o, p) S" @ c& }1 v
- } catch (e) {
; W0 O$ _' ]3 l - ctx.setDebugInfo("error", e);
0 `' j) L" }# |/ l - }
# Z1 X/ G1 w/ x% E6 Y - }
& Z6 T0 r9 a( `9 j/ e4 s - print("Thread end:" + id);
; u2 a) C& k* m$ m# @% p% n1 y6 S - }& }) [+ q. b% B; c1 l" T. T* Z
- let th = new Thread(run, "qiehuan");
# Y8 n( _3 M1 i* a9 Q - th.start();
2 R* V* P; b6 H# b4 C: L. m0 n - }
# p6 `- d8 m) g( B& V- M; O) \, C
) n) @% P9 o% F' i2 b4 {- function render(ctx, state, entity) {6 o+ X/ e/ Y' K& k
- state.f.tick();
5 `+ ]6 [6 ^8 ]* b - }+ W8 S8 z$ U a( m. n$ ^3 F2 h" Q) l8 _
% G7 O; }1 H+ Z. Z$ Z- G- function dispose(ctx, state, entity) {
" S7 T" { n7 i% U4 P. Q+ @( A- w - print("Dispose");
- O# h# ~4 u" S( E6 ^ - state.running = false;
) `; z' _! P- D5 f6 w - state.f.close();
' [: v7 r+ u# F6 r - }
* k+ }) y: q: K. a" Z - 4 O# z/ Z# w' L1 _6 d6 N
- function setComp(g, value) {
$ i9 H) S7 t* W - g.setComposite(AlphaComposite.SrcOver.derive(value));- Y! w% p- ]3 D. B2 X
- }
复制代码
: e' `% B) v- @1 j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。/ s7 D. M3 Z, ]2 X9 _. e
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# M3 m- D, z) Y; w$ }1 G& _顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)+ D' {/ f* G7 M& S9 M8 \
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