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$ A- }' G3 X$ s, U8 u7 ?6 v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。1 I( S: I5 w2 U+ Y' M, B1 O6 e
- importPackage (java.lang);
2 a% y. i/ f; Y* \* o B: K - importPackage (java.awt);
/ @0 }$ m- j P9 e# C - 0 e+ _2 q' O5 V) `( X
- include(Resources.id("mtrsteamloco:library/code/face.js"));( q* T% Y( ^4 }6 z
- ) f$ j# l) @8 L2 R, p
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);/ F( I& t0 ]2 e U2 C0 o0 _7 }
9 f. _4 O" X6 k5 V3 s- function getW(str, font) {
# e3 K% W% c2 R. c) U+ t - let frc = Resources.getFontRenderContext();3 |( g; |+ \& K5 Y
- bounds = font.getStringBounds(str, frc);
# k$ N" ^0 P; ?! j* Q - return Math.ceil(bounds.getWidth()); P. b: ?" s' P* t7 y L
- }/ w/ }, m0 N$ k. `$ a
- / X- k; @% ~+ ^! N8 P, Z
- da = (g) => {//底图绘制
! K9 e8 S6 L' l ]5 k2 l- Q5 \ - g.setColor(Color.BLACK);
) R) K0 A$ V2 I) ^. N$ v* [6 d1 o - g.fillRect(0, 0, 400, 400);+ A" G2 ?0 F1 D
- }2 a- s" ?/ f! a$ a) z5 a3 m/ e
- 8 m3 ?* |% a+ i: G0 @$ r" m! B
- db = (g) => {//上层绘制1 G L- r# h2 {. @# I9 V' F4 @; H
- g.setColor(Color.WHITE);. B9 j o5 a$ c) X4 e
- g.fillRect(0, 0, 400, 400);
6 t T* _5 [3 P - g.setColor(Color.RED);
0 }3 c+ s; L4 F' D V - g.setFont(font0);
+ K; A+ t% ~+ v1 O' \% y - let str = "晴纱是男娘";0 W% d/ @9 d% k. V* K2 T9 r
- let ww = 400;. K& J. x J( V# _+ j" }
- let w = getW(str, font0);
8 D* l" `: m1 ^8 `! f/ l( _- h - g.drawString(str, ww / 2 - w / 2, 200);
8 S- V* Z. B/ ^* d) I5 E+ O - }3 T+ A3 A7 q2 O$ v, ~% X& O& K& F
- 7 [# V6 x7 t/ H
- const mat = new Matrices();
, L f- ?& H3 u8 m( u - mat.translate(0, 0.5, 0);
- n9 c7 T( _/ x+ `4 y% z - 6 A: C" j6 R+ @
- function create(ctx, state, entity) {# N+ r2 C& V) s/ P, ?
- let info = {; a- T! g- A% M4 i/ c8 F1 n
- ctx: ctx,; L( Z4 ?0 X) H. k
- isTrain: false,% s" W! z! H* |
- matrices: [mat],
s9 b) ]+ {: _* M/ o - texture: [400, 400],( k! x" _0 q4 q) X9 f
- model: {$ C8 K0 d5 Y/ z2 ~+ O$ b
- renderType: "light",5 W$ g; E! ]# P4 @; h
- size: [1, 1],0 u' c$ u% c& m' m
- uvSize: [1, 1]6 M/ j/ X4 Y3 N2 t9 H3 R5 Q2 B% V
- }
& |; |% j0 a" C0 W - }" Z& h& ] v& c |! `! O# [
- let f = new Face(info);# s2 k: R" ~. d% D! r8 C% u8 X+ C
- state.f = f;
+ j% P |% [$ Z3 H# P, K+ }: r - $ J5 L: e2 }$ w! v; E+ [6 C
- let t = f.texture;$ S6 n3 I# Q- T3 n1 c2 q3 [
- let g = t.graphics;
: e* _3 x% E3 C - state.running = true;
) k) i n; h @7 S( S - let fps = 24;0 E6 A: R2 X" q+ @+ D
- da(g);//绘制底图% f" o% E! Q* l( d; I
- t.upload();; o4 G# ~4 B9 f) [
- let k = 0;1 W5 O3 g/ g) ~% V6 p9 g) D
- let ti = Date.now();
+ [& L3 N" D: K: x$ w& w# v; j+ b- h - let rt = 0;
% ?" C- X4 p, B6 }& ^ - smooth = (k, v) => {// 平滑变化6 O0 d! w' c2 q% I! g3 m
- if (v > k) return k;4 i2 b2 w: q2 h9 l) |$ J6 |1 P% l
- if (k < 0) return 0;
0 b0 S2 Q3 f9 T0 \7 {0 { - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;1 b- [6 g1 g; O$ Z, I0 W( e/ H
- }
; u: X/ E9 U V( K H - run = () => {// 新线程
% z, y$ T# b6 J4 B/ e - let id = Thread.currentThread().getId();
4 W7 ~# G" ?$ z, }2 z+ C - print("Thread start:" + id);
8 C7 x W% ~% A - while (state.running) {
: x6 P( [. u/ w+ W3 X - try {
% v7 B! i" a0 `9 e3 o3 e - k += (Date.now() - ti) / 1000 * 0.2;
[8 c: p. M2 q3 _2 a. q, D* x - ti = Date.now();
$ n) @- N- b) a; C" p1 \; o - if (k > 1.5) {
* f5 x, u& e4 o2 t& ` - k = 0; m g, j- R+ \) L7 i3 j
- }9 X) `7 p; e: V0 M6 c3 \$ [
- setComp(g, 1);3 V5 v; ~5 B" W! O- M( g9 [
- da(g);4 V6 ]. ^5 ~8 k, C, Q
- let kk = smooth(1, k);//平滑切换透明度
, D Z7 a! a1 N - setComp(g, kk);7 b' V$ [, s" u$ B; U
- db(g);
: D% q3 E' Y+ e - t.upload();
1 M& |, ~# Y" A7 |% n& R7 j - ctx.setDebugInfo("rt" ,Date.now() - ti);
7 F% j2 V2 g' C p8 k2 ] - ctx.setDebugInfo("k", k);
0 n; O* U: z* W8 v - ctx.setDebugInfo("sm", kk); M/ g# [& k6 M6 `3 S2 a8 z
- rt = Date.now() - ti;
% x9 E* l; k( J4 p3 K4 n: Z - Thread.sleep(ck(rt - 1000 / fps));. f& ]" ]; U/ ?6 f! C
- ctx.setDebugInfo("error", 0)
! e+ T" x+ a% |# L! p* ]! @' V - } catch (e) {
8 J: \+ E* ^6 R - ctx.setDebugInfo("error", e);) p$ u" }+ b! W* N8 r6 k" J0 i( D
- }) d0 c4 m# M7 l$ x* ?$ p9 q
- }
: q* j* m& [% [5 Y- @7 N - print("Thread end:" + id);' o9 ^; ]5 J! d5 y
- }
; I5 L% x4 B3 W; f - let th = new Thread(run, "qiehuan");& H8 N, c$ ?6 F1 p, G
- th.start();& \/ ^( _ P3 ?
- }
9 `' W. x6 }! E4 k* n
9 Q$ q7 `2 y( N! n) A- function render(ctx, state, entity) {& v/ [- p% l1 ?7 ?9 b
- state.f.tick();/ d5 }( t2 w0 {
- }. B3 N: }# T+ z9 h& d4 I& t
% m# ^2 f; f, r9 _: d; D4 V& i- function dispose(ctx, state, entity) {# t& [ f& w, W% I
- print("Dispose");$ i% n3 K+ o9 k1 y! f1 y2 m& N; {
- state.running = false;
/ N/ \9 Q$ g5 ^1 ?, w - state.f.close();# |2 I% F$ I9 B3 {7 i# C
- }1 m1 j' w$ d3 E. ^2 c% a& G
$ y+ Q" d6 T; M- function setComp(g, value) {
/ Z2 B' P! M, V5 |+ ^4 \* |+ [ - g.setComposite(AlphaComposite.SrcOver.derive(value));' c3 X$ t) j4 H2 y, r
- }
复制代码
0 N k) R# B' Z) q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。
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$ j3 p$ U- R8 O- ~: S
: T9 r }. p, w顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)* L: A: q2 ^" m, g& g' G! X7 ^+ u q
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