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* H4 ]; \2 x5 M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。
/ h( V2 ]# v w$ Y% r2 |# e- importPackage (java.lang);
/ t" Z/ {* |1 W, ^* D - importPackage (java.awt);
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3 V. o7 I0 K: }- include(Resources.id("mtrsteamloco:library/code/face.js"));
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5 g: m- Z, B# M; j9 u: P; P- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
0 K% ?7 a0 g1 i1 I8 V# n1 I - $ _$ H# ?) {4 G- f+ J n, U8 L/ ~
- function getW(str, font) {
! [. l ~2 Q8 j& G* D3 { - let frc = Resources.getFontRenderContext();
/ u5 m' s t% L$ p7 y - bounds = font.getStringBounds(str, frc);# }5 X: U& ^4 Z/ O( p
- return Math.ceil(bounds.getWidth());2 D2 H; ^( f& k- a. I9 {9 _9 A/ C2 q
- }' v$ u0 ]5 L( \* {7 s1 L
- ; x4 k9 O- I4 T. X# @" @8 S
- da = (g) => {//底图绘制: A( Q0 G$ ?6 y
- g.setColor(Color.BLACK);! {) D! ~9 s" V& O# k% I
- g.fillRect(0, 0, 400, 400);2 i5 V; W7 ]9 ^% j
- }
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6 E. \% J) e2 \# M- |) X/ e- db = (g) => {//上层绘制
9 H `0 A) u; M# r7 h, T! n - g.setColor(Color.WHITE);% \* ?/ h v4 q0 j( A
- g.fillRect(0, 0, 400, 400);
0 D( J# i" c8 c0 x0 X8 M( p% F - g.setColor(Color.RED);
8 t$ m" n6 P* K6 T* ~0 t- L+ O - g.setFont(font0);5 B: i5 Q% d% l% c
- let str = "晴纱是男娘";
6 |3 ?+ x1 t* `1 u. z2 i - let ww = 400;+ v: Q& G3 o6 u% d% b
- let w = getW(str, font0);% E' q5 S/ c8 i
- g.drawString(str, ww / 2 - w / 2, 200);
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- 4 ~5 ^! q- a/ _) } l: w2 N6 f( a
- const mat = new Matrices();# X4 j; ~6 K" C. Q0 H b
- mat.translate(0, 0.5, 0);
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! l2 Y# i2 m* ]4 M' z/ i/ t- function create(ctx, state, entity) {
' L- y, c, k9 G1 _7 ]6 I) S - let info = {
" L* l5 J- ]9 U% V* l - ctx: ctx,2 v+ }1 N( F: D3 t& @
- isTrain: false,
P) y. O5 P; e, c* s - matrices: [mat],
5 i/ \7 O h0 X- q - texture: [400, 400],6 c# H) t5 R2 m) X" P- l( U
- model: {
: n/ \+ n" {" h. ^0 f - renderType: "light",
* w7 f; y6 }/ t1 f8 }; k. O - size: [1, 1],
: A& o! ?8 _. g - uvSize: [1, 1]# W3 \4 H5 @- }9 a
- }( Y0 R1 x) _4 c& X8 ?
- }
; ]! E% g. N) J: u9 i+ `, L$ } - let f = new Face(info);. f1 O6 d2 S+ s! B2 w/ `8 |
- state.f = f;* o9 U* u4 ]$ T! H1 z8 t
- ! Q; @' B( _ C1 p& i; c# ]
- let t = f.texture;/ w1 z/ B- W0 P) l5 S
- let g = t.graphics;
: d0 Z0 a: T0 r9 ?% R& t - state.running = true;
4 C% m/ f. H' p; h) P" @ - let fps = 24;
5 n6 h/ _# t% t - da(g);//绘制底图
; F1 d2 x2 p* C& [0 p4 m - t.upload();4 H: w+ W' w: w' [1 l
- let k = 0;+ ]$ E& m& y; K0 M! ^+ w! B
- let ti = Date.now();
8 s; _7 S1 M4 x( H6 Z7 a4 { - let rt = 0;. j( k, ~1 [# ?; u
- smooth = (k, v) => {// 平滑变化
% x6 ]+ y0 Q# M/ i& G7 L# u! \ - if (v > k) return k;/ ^ m) f+ j7 I) ]. i( J
- if (k < 0) return 0;
/ i, i# m+ \" r! q2 w - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;+ M4 [9 `& m# A! X
- }/ S, _2 N8 l, e% D
- run = () => {// 新线程
7 x9 x% i' P0 m5 y) r, Z - let id = Thread.currentThread().getId();
- ]3 C3 ^+ e( n) a& I5 G - print("Thread start:" + id);1 P3 r& H; B9 ]/ v
- while (state.running) {
/ a5 \# f" r$ c% ]' n3 x* | - try {0 C( V6 M! U1 Q$ h( g
- k += (Date.now() - ti) / 1000 * 0.2;6 I0 m, c. @' }; L' }5 g4 u
- ti = Date.now();
~$ W* {4 f& e1 e6 X: E# K! A" ] - if (k > 1.5) {
8 a' ?- r: ^$ i" T+ |8 `4 o5 i" g6 u5 m - k = 0;
$ e+ M1 r h0 S - }
$ @' f9 ]1 { P - setComp(g, 1);1 n; ^* E1 w( W& E
- da(g);
* ? Z; h+ Z& I" }9 [ - let kk = smooth(1, k);//平滑切换透明度2 \) S& `& M$ r- |) p
- setComp(g, kk);3 Z( G( M% y, ]5 i; S' N
- db(g);$ I! e0 r0 n& m% T7 R# N( {
- t.upload();% x( s, D6 j0 E
- ctx.setDebugInfo("rt" ,Date.now() - ti);
0 ?+ U( Z0 {. G7 e F - ctx.setDebugInfo("k", k);/ I" U1 r+ W4 b! g: E
- ctx.setDebugInfo("sm", kk);* e+ p3 [2 w( O, Q6 V
- rt = Date.now() - ti;
C9 a+ V) d) `" c - Thread.sleep(ck(rt - 1000 / fps));: ~ U' M, t$ l5 Z9 P( D; |
- ctx.setDebugInfo("error", 0)
- U6 i- }( R/ H4 q5 W - } catch (e) {
, p3 A2 c% c" ?9 @3 S - ctx.setDebugInfo("error", e);- s& O; M# b+ t8 {) ]0 b
- }
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- print("Thread end:" + id);$ H6 X% {4 `3 I0 X p f
- }. k: Q) } B. K6 C
- let th = new Thread(run, "qiehuan");% ^( Y8 l- U/ \# L
- th.start();
- |( C3 q" f8 } - }
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: l2 x' P) s6 g$ J- function render(ctx, state, entity) {
: t# o S6 R1 Y0 c) Z - state.f.tick();
# y/ Y" Y: J! s1 ]8 A9 r - }
- B1 o& v7 s; U( T" E: K4 F. C
8 j& x' h @. R' m9 A" ~8 j, \9 v4 @& f$ c- function dispose(ctx, state, entity) {* r# Q" w; n. ?( k$ W
- print("Dispose");
3 ]8 |3 _4 r( e% f# }1 o8 D* P - state.running = false;5 \8 B0 Z+ l* i
- state.f.close();# |- w4 l( g. R7 ~8 H/ Y0 R
- }
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5 y1 y( e. F) N: W2 {& J. m: a- function setComp(g, value) {
, d0 g3 z6 z1 H) m9 Y2 T - g.setComposite(AlphaComposite.SrcOver.derive(value)); c3 }/ }/ a( O" n( N. c
- }
复制代码 . ~& Q6 Q, c% z% b W" c$ b
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。8 i- N T/ q) t0 n" d' u
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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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