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' H5 K/ x: |% ~% D* _9 u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。
" i8 d5 V- p1 t: h7 b- importPackage (java.lang);1 N& [6 p6 C% @( |+ V& @
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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( W! J" r5 P" ]4 S! T6 d8 ?. F( g) c- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);6 t, Z1 U; {7 o/ k/ x
8 g' x& J7 _# j6 r p- function getW(str, font) { @: C, h) J6 n1 f" d
- let frc = Resources.getFontRenderContext();' f0 m+ x* M8 e% R+ M* z6 U2 F
- bounds = font.getStringBounds(str, frc);6 o, j X3 J7 q% D8 P; ~
- return Math.ceil(bounds.getWidth());( H y" I5 \% [' G4 O$ E# R; W. y* M6 Z
- }
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- da = (g) => {//底图绘制4 m0 I1 b$ }# [% P ]& w& J
- g.setColor(Color.BLACK);
4 I' Y0 @: T0 X - g.fillRect(0, 0, 400, 400);( R6 v4 q4 G& ^, {" k
- }3 S- S3 E4 l6 F V6 S
- 9 P9 Q/ k2 I' s% z; f
- db = (g) => {//上层绘制7 b" Z% @+ H# u; o- R
- g.setColor(Color.WHITE);
% i1 u, k1 I& P# r ]+ z8 d - g.fillRect(0, 0, 400, 400);4 K' C+ M4 Y, L* \
- g.setColor(Color.RED);
# b7 I' o+ J( u6 R9 | - g.setFont(font0);
F0 k+ @9 O7 w* j8 w8 H* G0 N - let str = "晴纱是男娘";/ B. J9 i3 G# y9 {; K: b
- let ww = 400;* }' P4 v1 F& R; M# M) b* s, A' F
- let w = getW(str, font0);
5 [; `5 J' D4 t& W - g.drawString(str, ww / 2 - w / 2, 200);1 m* q/ \! h6 P
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- ; s; {$ }1 S, p: u# d# Q6 Z( q
- const mat = new Matrices();
" X- L5 ^2 `/ C8 z, o - mat.translate(0, 0.5, 0);
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3 U+ ]- y0 q2 ?8 T& y- function create(ctx, state, entity) {
! p* i, P% O2 c - let info = {
- B8 g/ K! N+ i - ctx: ctx,
; g" ~. v b1 k - isTrain: false,
0 F( c W9 y6 H+ x4 i7 c/ [ - matrices: [mat],
! Q/ \0 a" H) R$ P5 x* V, C: _6 G - texture: [400, 400],. O8 ]' V [# t$ d
- model: {
! L9 T3 V1 `. ^+ U k) g! \ - renderType: "light",: B0 |4 k4 t Z( @
- size: [1, 1],/ q& x& F$ B H K
- uvSize: [1, 1]! K1 w. c( X/ }% v. Q0 k
- }
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- let f = new Face(info);
( \1 o) S8 K: y' j9 C+ O - state.f = f;) Y& u- [+ j; h; d
! n0 ^# l3 p& O/ i4 l- let t = f.texture;
$ I7 q0 i1 T! a( _5 Y" ]4 G - let g = t.graphics;
( w. G' x6 X$ {2 l - state.running = true;8 U5 Y3 j% {2 [4 R! K9 [- w. ]
- let fps = 24;
2 Q+ u* L( x3 G8 W. N - da(g);//绘制底图
l! e0 Q" S9 G3 N3 f' [) v3 k - t.upload();7 ]1 x& O( ~7 A) a
- let k = 0;# d2 s! T- D: d! |
- let ti = Date.now();) J p! `, F/ O$ a
- let rt = 0;
. }. {- y3 v: z2 e+ Y - smooth = (k, v) => {// 平滑变化
H7 S9 i" p8 h3 F) ^0 s4 S( L - if (v > k) return k;
# G: ~) C6 \* V, J; c - if (k < 0) return 0;, N' u9 x& I8 i
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程 x8 Y! M$ W6 l# u7 T
- let id = Thread.currentThread().getId();0 ~! J# W& @$ i4 Q6 C5 L9 E) l8 @
- print("Thread start:" + id);
" ^- S/ W7 w& R- S2 A8 W - while (state.running) {
6 \9 w* P- ?) o" O. J - try {
8 ~% l; |& L, [) A, G - k += (Date.now() - ti) / 1000 * 0.2;: C) ~3 E: A( `; l6 t( C e: B
- ti = Date.now();
5 s3 `9 N( t, q5 |3 L- t. A - if (k > 1.5) {
& a9 K% x" L+ n4 t$ j% O6 r$ ]/ v- \" L - k = 0;
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- setComp(g, 1);5 B6 F' _9 I, H2 Q5 G) v6 V/ ]1 h
- da(g);( u4 s2 z7 n* y0 t
- let kk = smooth(1, k);//平滑切换透明度' l5 A2 ?) V! I3 m6 h0 M
- setComp(g, kk);9 V6 \9 @8 t7 H* n
- db(g);- b' a, `# w) F( v) L: p* r
- t.upload();
) U5 V" P. T+ Q - ctx.setDebugInfo("rt" ,Date.now() - ti);
/ ]* `" r' F% G; n/ Y* m% r - ctx.setDebugInfo("k", k);# l6 t( i. c* ~# n( O: M& A: _
- ctx.setDebugInfo("sm", kk);
8 x. L' \! z3 d6 x/ d/ i - rt = Date.now() - ti;/ |( d: V3 [) d1 W1 N( n, n+ t2 Y
- Thread.sleep(ck(rt - 1000 / fps));' Z1 y) u* d" ~; u7 }, ?" W: E
- ctx.setDebugInfo("error", 0)& ]% ^0 e+ I, i8 p8 q3 O
- } catch (e) {( p: [) v2 B% u! M
- ctx.setDebugInfo("error", e);
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- } o" E) \" B# m) e8 } e) u
- print("Thread end:" + id);
8 U! r( @" H3 p+ d. f8 k" {. D - }
' z/ @& o7 l4 U - let th = new Thread(run, "qiehuan");
3 ?7 o& Z2 B1 o% l `8 R - th.start();
8 Z9 L8 b0 E) j& M - }
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- function render(ctx, state, entity) {
: B4 T& o* Q& z/ f$ v) K. K; O - state.f.tick();
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- 0 f! u! t8 L' [) Z$ U
- function dispose(ctx, state, entity) {. Q4 Y* ^6 j$ R0 y5 F' T! C5 v
- print("Dispose");6 f" d$ w B2 u Y( }9 q' J! ]: H* h1 |
- state.running = false;
; o; E" t$ {9 [7 J( ^* c - state.f.close();+ S: |5 Z9 M( e$ P; ~& G& ]# R
- }
+ h1 {# p, S A& a; R" x {
0 j- m, S- l3 {; `4 b% P/ ?- function setComp(g, value) {) V& V5 q' ?: Y* @, o; E1 B
- g.setComposite(AlphaComposite.SrcOver.derive(value));
9 {$ W& Y$ `7 k+ @4 \+ {# ]& o - }
复制代码
. o$ e M5 u% [1 e. Y2 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。0 P6 z$ w& O; |& i
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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)
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