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; z' {% ?. U" l2 R @0 N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。% k7 r' L, R% {4 q" T u& w( k( {
- importPackage (java.lang);% x* q! D# O8 k, s; _: E4 z- x
- importPackage (java.awt);, e$ X$ q+ F! m5 k/ m& D: ], u" s5 L
' ^% H) b2 [! Q. i" O; i' G2 |2 |- include(Resources.id("mtrsteamloco:library/code/face.js"));
/ ?- t$ q' ]3 s- W' S4 V9 ^) i- [
! c$ d$ P6 `+ O- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
" [ j8 H9 v4 Z) \ - ) x0 G3 `$ u* w6 x2 X- ^
- function getW(str, font) {
! I8 Q* U. o* } - let frc = Resources.getFontRenderContext();
6 o8 W& u) V: n9 S! `5 } - bounds = font.getStringBounds(str, frc);
* j2 |8 C0 A3 z& K0 K% N - return Math.ceil(bounds.getWidth());
: J9 m1 E2 j- s2 o* o. I9 a6 n2 t0 F- F - }
& _4 j+ p8 d" r4 f! f5 t0 u - ! v, j3 k! z- f% \ u/ N
- da = (g) => {//底图绘制
' \% m2 z( x( ]( P5 B - g.setColor(Color.BLACK);# }5 y8 W# Y, D! Z
- g.fillRect(0, 0, 400, 400);1 a) V+ l) Y2 D- d1 Y8 u( K) `
- }
, w0 @. b2 T3 E- B, k# v0 j - % ^/ l+ L0 x4 E. X5 X
- db = (g) => {//上层绘制' A# \# x/ b- _$ {3 x( A; q" `* R; x: g
- g.setColor(Color.WHITE);
! I7 p5 m$ E9 F/ q) B: i% D: i - g.fillRect(0, 0, 400, 400);2 _: Q! x$ e" Z7 P& F8 X. ^) n
- g.setColor(Color.RED);
8 `' {% \* h$ P - g.setFont(font0);
5 Q! ~4 r* }, ^! j - let str = "晴纱是男娘";, }( e/ h6 L7 W% ?) m' X1 P
- let ww = 400;
& J4 K% a3 p: u9 \) T - let w = getW(str, font0);
' |& K( A8 s* Y) i w - g.drawString(str, ww / 2 - w / 2, 200);% U. @- n5 Z( a
- }9 p/ |4 s' v% M- t3 z
- 2 P7 t3 D7 Q2 m+ l7 G2 N; {
- const mat = new Matrices(); @0 e% V8 E" I! n
- mat.translate(0, 0.5, 0);
! y# j6 m4 r. ?9 ^6 i
6 h" D4 K1 X# G m- function create(ctx, state, entity) {
5 H4 q7 Y3 Y! b - let info = {3 |# F* q6 n$ q
- ctx: ctx,
" d8 V( a- b! q9 _ - isTrain: false,
4 Q' h- ~, W* v: F* P/ ?5 y - matrices: [mat],* E: E6 s; O& w7 Z: x
- texture: [400, 400],
. n. c* }( ^4 F8 {/ P% q, b - model: {5 N% J4 h8 Z" _* @" f3 v2 J. S
- renderType: "light",
) ?0 O+ R1 G4 N2 S - size: [1, 1],
+ v* P% J& J: X - uvSize: [1, 1]
/ b N) S0 B$ A# `) i+ o6 c1 U - }# ]+ ~ }; q( l2 v: F
- }
e: z; ?2 N/ A! _$ v0 s+ {0 V - let f = new Face(info);) h6 L8 D ~+ ^8 V! B0 u9 N4 f
- state.f = f;3 f# Z, j1 `: t* p5 G; F
- % b d# i" ?6 J0 P9 G: h/ t9 w
- let t = f.texture;
5 }# Q* A- F; l2 r' U% Q3 z - let g = t.graphics;2 ?6 J$ \. _9 u
- state.running = true;
, ?7 W# s0 P, J3 y - let fps = 24;
! C( e( O/ q6 |( S7 U - da(g);//绘制底图
0 s( m$ [8 a+ Q9 {- x - t.upload();
( _- m: ~" m" W' x' `; U* } S - let k = 0;
8 n! A6 y$ |: C: c - let ti = Date.now();
6 s" K9 V- T0 `" h0 ` t1 J - let rt = 0;8 F2 m0 n' ~. L% P
- smooth = (k, v) => {// 平滑变化
& j; Z8 G4 a5 [6 m, ~ - if (v > k) return k;
; S+ V! c4 [, e9 O% S - if (k < 0) return 0;. }9 @% ~3 w y8 Z, s
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 l+ b( [& V% W; D" W6 k; J K2 J
- }
( ~0 e( R J, O+ x n2 c - run = () => {// 新线程
1 E3 |& Q' n" d& h _/ V5 o - let id = Thread.currentThread().getId();
; K0 `- Q4 |/ G, e9 s% g3 |) [ - print("Thread start:" + id);
1 c+ B& E+ e f2 }5 P) F* R; T - while (state.running) {* r8 k- a- y( k3 P L. m1 A
- try {1 G/ {" u# | N# w
- k += (Date.now() - ti) / 1000 * 0.2;
$ k; c4 {' e7 G- G; I - ti = Date.now();
{' k6 v# A# I! Y+ ~3 {6 B - if (k > 1.5) {
9 G. E. E& v0 i - k = 0;. F& J% q7 k. X+ g
- }
0 T) |7 w2 k3 T% c; X' S - setComp(g, 1);3 N' D* Y0 L9 V8 H5 u
- da(g);
- N* _+ e, e- F- c" t1 _2 T - let kk = smooth(1, k);//平滑切换透明度- j0 D2 t/ O7 T7 m
- setComp(g, kk);
; I3 ~3 d& a5 K% g2 R- k - db(g);9 c3 V" c3 G! r- I; s1 Q
- t.upload();
3 P V2 Y+ \6 Q( L3 z7 b - ctx.setDebugInfo("rt" ,Date.now() - ti);. F( Y" r# Q8 ^, a A4 D" n
- ctx.setDebugInfo("k", k);
, o, M/ d) `- W4 I6 t- [1 K - ctx.setDebugInfo("sm", kk);
) P8 A Q, D6 K( w7 C - rt = Date.now() - ti;
5 b+ E- u: o' r - Thread.sleep(ck(rt - 1000 / fps));1 [3 [$ ]- c( h' ?1 `, O
- ctx.setDebugInfo("error", 0)4 A( M0 g( D7 |" ^' D" [
- } catch (e) {
7 M3 y8 K4 C( x5 g+ J - ctx.setDebugInfo("error", e);2 U U* Q' N2 [, `/ k) ^' C
- }
1 n; |$ K! @0 w9 i* T" Y I - }. y; d( I1 z# q9 E) j
- print("Thread end:" + id);0 D* U/ A# ~. K! z
- }
% v9 e0 b" g6 k; h% t - let th = new Thread(run, "qiehuan");
' \" Z/ I3 X: d& V - th.start();
) Z8 h- I* e: e: C% b1 ~ - }5 E& o8 V" f# F: u
- ) ]1 e% J# G# g+ a9 b
- function render(ctx, state, entity) {
8 b% s9 Q1 c9 ]! W - state.f.tick();
; g0 B# }2 B1 b" s - }
# j% j9 c \ r* m, C9 k* q& w
/ Q$ a( O3 e+ |* A3 Z$ K- function dispose(ctx, state, entity) {( g; s1 `5 v- l. o4 y/ ?% T
- print("Dispose");
; b2 `% J; C" M& x$ G: n2 q' g; ` - state.running = false;
+ P" e# h8 C0 ~5 \* F/ L - state.f.close();
) b3 [, w* ~4 p% A9 x$ Q- X) i - }
`! S' C& [$ Y! a. D4 W
/ L# |4 z' r; f. k+ q6 V- function setComp(g, value) {
9 E3 {; Y* z- \* e5 c K - g.setComposite(AlphaComposite.SrcOver.derive(value));
. E! w* d d) H! \1 g - }
复制代码
+ {3 b& ?; s. b: w" f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。# {# |; l$ v) `7 ?! A9 O
0 ]! ~$ `, i7 `2 ^; F6 O0 d5 m7 M7 [+ H
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)& m$ ^! c; f0 g( K' H
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