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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。# X4 m6 p0 ]. U+ h
- importPackage (java.lang);% v; T# D+ R2 K
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- m; @7 `+ [4 V+ v( A% p- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
5 L) K6 r7 L: D l0 Q - let frc = Resources.getFontRenderContext();
. e4 Y. H4 \6 m6 i3 p9 `) R7 w - bounds = font.getStringBounds(str, frc);2 m) V# x3 g, T# Z* f
- return Math.ceil(bounds.getWidth());
+ z4 L9 y9 m* k - }
Y" R9 ~$ {; D- g0 F) {
: Y5 q! q; ]- J0 {% ?- r- da = (g) => {//底图绘制
, Y0 Q0 x' g* f8 g/ W. H+ H& R6 n - g.setColor(Color.BLACK);0 S7 L g0 X4 _1 h$ B5 L
- g.fillRect(0, 0, 400, 400);; Y8 [5 h8 A8 e' a4 y# o) X# l+ @
- }8 C) E2 U. O9 a0 ~, K, D" o' e
- ' i9 e p0 U( r. U
- db = (g) => {//上层绘制2 x$ S+ b9 Y# v6 O4 w" K
- g.setColor(Color.WHITE);
2 S2 n( ?& J8 C* {2 x - g.fillRect(0, 0, 400, 400);
9 J. y' D" v P. f4 ?! x$ T1 f1 s8 h - g.setColor(Color.RED);
# \; N: z$ `+ ? - g.setFont(font0);$ h4 C/ A g0 Q1 A+ W- I3 V
- let str = "晴纱是男娘";
1 L. k9 f) L. z& v* n - let ww = 400;4 G; R$ f' ?( v$ S5 u7 M
- let w = getW(str, font0);7 b6 K# W5 F$ p/ a+ ]
- g.drawString(str, ww / 2 - w / 2, 200);
! p, R9 K( t J - }
+ _6 n% Y) j$ |; H - 7 v7 A8 X" ]6 P. n* _- E9 `4 b5 ]
- const mat = new Matrices();
& D4 O; |4 |* c4 t3 c* A - mat.translate(0, 0.5, 0);" Z. }3 j, Z* c9 P+ [
: L5 ]% u% X& n9 a* l' F f' U( b& _- function create(ctx, state, entity) {
4 i; E/ z# ^- ^2 Y- F - let info = {
$ u- I5 z: z3 m* L5 b" n% ] - ctx: ctx,
( A6 P y6 G2 N - isTrain: false,/ a& ?. b- B) J9 N2 S' z
- matrices: [mat],3 B+ j* K5 y, h) z
- texture: [400, 400],; L C H- O- x @, h
- model: {* n' C; B( m* m+ s3 B
- renderType: "light",
. K' B$ i0 |2 T* n0 X - size: [1, 1],/ I( ^& G8 p3 K: W5 j
- uvSize: [1, 1]
/ c& B* h7 r2 d4 f - }& s$ ?9 L* B: t" K4 C9 f# ?
- }
: M/ S8 x9 B1 m X C7 C4 e' i5 h4 { - let f = new Face(info);1 s0 E2 [/ `0 l( L' N8 T5 u6 Z
- state.f = f;: m+ u& Z* K# O3 v, B/ z
- & {5 c; M6 L. _+ q
- let t = f.texture;
. S5 _; i3 V3 ^. U- x, N% X- z# a7 h - let g = t.graphics;0 ^* y2 ?0 x4 I- Z
- state.running = true;
+ L6 Y6 P1 r( w - let fps = 24;
# f. `7 \1 _/ p6 ~! N, B: ]' @- m% }5 y - da(g);//绘制底图- F1 e0 g! ^4 d4 Q- Z9 J: v
- t.upload();
" ?8 m1 L5 u9 s) m - let k = 0;
: G0 G6 O: ~+ h; l) x - let ti = Date.now();6 a" M& O( M: w- v/ c% [9 J. `* y
- let rt = 0;1 z9 R6 _$ m9 z$ L% Y
- smooth = (k, v) => {// 平滑变化
5 M- r; E1 |: B$ g" j0 y: I - if (v > k) return k;
7 E6 U" T& O$ [/ Y) G' j" J - if (k < 0) return 0;' W! S+ b* J8 w, v
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 \* C( W3 L- t. L! N: {7 ]
- }- n! e# E7 |3 h9 I( x+ g/ i! E
- run = () => {// 新线程4 D" N3 K) Y! |; @
- let id = Thread.currentThread().getId();6 O" Z8 ^* l" B8 w J
- print("Thread start:" + id);: r2 q3 R4 @. R* j4 j$ G4 u
- while (state.running) {1 v1 F5 |: o4 @
- try {
F7 g/ v! L! x - k += (Date.now() - ti) / 1000 * 0.2;
5 u- x, Y: o( S* }5 Q3 q - ti = Date.now();
3 E! a; j8 |) g+ a - if (k > 1.5) {' _+ @) Z! o! i- C1 r1 R+ g
- k = 0;$ q& } Q5 `; A5 o3 s/ N
- }
& U! w) c( Q6 e, ]$ |4 u4 I - setComp(g, 1);
- J0 o8 c2 Z0 h$ Y - da(g);4 D( H6 w( M8 ?, Y: _
- let kk = smooth(1, k);//平滑切换透明度: U! z- J: }4 g8 W
- setComp(g, kk);
8 { B% z$ v3 j1 C5 F+ T - db(g);2 [& |" Y# I! H
- t.upload();- H2 ?7 M2 B7 i# W% ^# x
- ctx.setDebugInfo("rt" ,Date.now() - ti);; c, T- \" @- u Y; K/ }
- ctx.setDebugInfo("k", k);
X. A. q- ~( H2 P Y& H! W - ctx.setDebugInfo("sm", kk); F1 q1 v- T, I5 A
- rt = Date.now() - ti;/ T% D' F( @3 g" O) J
- Thread.sleep(ck(rt - 1000 / fps));
8 s3 T( V8 i( }5 p6 k/ ? - ctx.setDebugInfo("error", 0)2 m* `7 t3 e" l1 g* F e$ Z, ]$ E0 d
- } catch (e) {$ Y. L8 I4 i; d- d1 [* {0 K; G
- ctx.setDebugInfo("error", e);! c! r' Q% }0 i+ f" P! v6 |
- }" ~1 W6 M) h2 F) L% w# M- _
- }+ {2 M; u- [5 F9 R" s9 [
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
5 F; @) A7 w$ y; G! t# c - th.start();% y, i1 k( ^) C
- }
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- function render(ctx, state, entity) {# @8 x" A5 p3 [ p$ ^- A: B$ [
- state.f.tick();: k" s h' x8 L7 l' p+ J" u
- }) z/ F7 l, O' f- W0 j- O9 |4 E
- , g" l8 r, z. B0 ? L% ~
- function dispose(ctx, state, entity) {
% T' S4 R5 K2 W9 s - print("Dispose");
( J, F3 x9 ~; D/ x6 k - state.running = false;
2 G/ o1 F* g# G7 D( o5 J; H - state.f.close();4 A2 m' f# S2 ~: Y3 a: I
- }* P3 C6 z2 w- c4 ]
% n, V P$ Q0 ]; C$ f9 r- function setComp(g, value) {
' F, H/ Y6 ~6 Q0 W/ V4 c7 @5 u3 I - g.setComposite(AlphaComposite.SrcOver.derive(value));; }: R7 S: p. s0 l2 k z- E9 `, E
- }
复制代码 0 k+ j+ R4 x8 M6 X
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。/ m$ b( M5 B$ }3 F5 t6 R
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0 U* P+ _+ i4 m3 T( K' 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)
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