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6 [6 k) b. x9 p; }3 \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。
% N/ z. F2 y m' F- importPackage (java.lang);+ e$ }8 u6 S, p" S! Y
- importPackage (java.awt);
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, G& O. e& u: R- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) { H6 `$ U( V+ R6 M; K& D+ _: b
- let frc = Resources.getFontRenderContext();
: [: Q! A7 t6 Q6 t, |7 _ - bounds = font.getStringBounds(str, frc);7 }: R/ [7 b/ M9 I
- return Math.ceil(bounds.getWidth());
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- 3 c! z. L: x9 Z; W. o( [; t
- da = (g) => {//底图绘制, R' M0 L3 r- I1 w% j( s
- g.setColor(Color.BLACK);
* Z0 Q9 _: m5 m! C - g.fillRect(0, 0, 400, 400);2 M# ?2 ^' E9 B2 U& |
- }
. G- `% ]% N7 ~5 k" N. b5 | - 8 N$ j: n/ a) d1 Y2 k8 P
- db = (g) => {//上层绘制
. |9 S6 i) K, e+ W8 |$ }" W8 g - g.setColor(Color.WHITE);
$ [: D0 `5 e: w/ n# Z9 U - g.fillRect(0, 0, 400, 400);
$ o* F* A; M1 i - g.setColor(Color.RED);
7 G7 n3 |* m! i: [* a$ L0 x - g.setFont(font0);4 X; N9 l' {) O* {1 X7 E
- let str = "晴纱是男娘";3 R# F& x# p# m; G
- let ww = 400;3 C4 V P! G- b! W0 s% Y
- let w = getW(str, font0);
7 ]: X h. ~; Q6 P* M$ O - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();: h6 F6 A3 L' g3 n" H
- mat.translate(0, 0.5, 0);' d! _( p8 P% y% i# D; F, h& h3 T
: D$ R2 u& e) K2 B, Q- function create(ctx, state, entity) {! k1 F+ x) C0 m" A# R
- let info = {4 r, m: W. g8 k( U, Y% X
- ctx: ctx," E2 n7 U6 @# D& @7 w4 S4 u
- isTrain: false,
. t8 n- c& J# v. M' h4 E! p6 f - matrices: [mat],
) ^5 j( \" \0 C- Z2 h2 Y: F - texture: [400, 400],2 Z+ G* }+ [" C1 I7 E& R
- model: {. S, D- b' }" r7 c
- renderType: "light",
0 O5 f" R8 Q/ O- U8 t( _% @ - size: [1, 1],
7 ?4 J0 `8 ~( C" V' |0 V8 X3 j - uvSize: [1, 1]
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- let f = new Face(info);
& v- u7 [" |9 W+ {, f' F - state.f = f;; I6 R* M; b+ w( \% s% I; c+ e" R/ G
- 6 R% S0 y$ m9 n( G2 p& U3 n2 e
- let t = f.texture;
* W0 Q1 z" ~* V* ~0 o% ^ - let g = t.graphics;
/ b' W: p. w9 X% o$ j% o8 s `* f1 `9 Y - state.running = true;
" J6 T7 ^5 P2 F - let fps = 24;
+ t' k3 v; O+ {7 L - da(g);//绘制底图
: t' ^, C' I4 h$ `' Y; a' H2 V - t.upload();
- C; o5 Q' D* Y+ w/ l3 h! h) o) d - let k = 0;3 G" y ]3 Y; f3 l+ z: c; p
- let ti = Date.now();
) y- C% _3 f: x$ o - let rt = 0;& ^2 c! f2 C) h' Q4 o
- smooth = (k, v) => {// 平滑变化. j, p) F3 d- n" i. ?" {
- if (v > k) return k;3 H" b" |8 [; n$ @
- if (k < 0) return 0;
2 E) d' p6 d+ ]: Z0 k2 l' S9 p - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
, r# _* Q0 A0 A @1 Z, J - }
u. [; v4 J- s3 Y% I - run = () => {// 新线程' q5 e( }% J0 M! H
- let id = Thread.currentThread().getId();0 K- r( E% z+ C
- print("Thread start:" + id);1 H+ t) w; R% N1 w; a; g; l4 P) s
- while (state.running) {, U' v& f1 g% K* s+ B) a. ]
- try {. x7 V" z( ?8 s! p% @! S
- k += (Date.now() - ti) / 1000 * 0.2;9 ?5 K) r/ l" t8 _
- ti = Date.now();
7 m& p ?2 f, Q/ R3 E6 ~; C - if (k > 1.5) {# l" w/ P* z3 R% g4 v: m) N1 f
- k = 0;
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- setComp(g, 1);
7 y- n5 t/ v7 E h3 M& g - da(g);
0 ~# j+ r, P2 A2 m& H7 s- W( Y5 A) r - let kk = smooth(1, k);//平滑切换透明度4 m3 w$ l5 @ I6 e( B3 j1 A' ?
- setComp(g, kk);
3 \8 a6 _ p& V& U; e7 E - db(g);* _) W, f: ^% T
- t.upload();
' N) `0 X! g$ m; y9 e) R+ i - ctx.setDebugInfo("rt" ,Date.now() - ti);
" M2 X- E" q$ q& E5 W - ctx.setDebugInfo("k", k);
7 q+ F2 H+ f2 h8 E0 f - ctx.setDebugInfo("sm", kk);7 s. Q/ x6 q5 J% X
- rt = Date.now() - ti; e" r% m: U8 s: I* F f! ]
- Thread.sleep(ck(rt - 1000 / fps));
9 C6 Q1 @4 b6 l8 s( X4 d - ctx.setDebugInfo("error", 0)6 _% e- X4 }# y: ~ M% O$ }
- } catch (e) {+ o3 U% `+ E+ {& m6 R) }8 H4 A
- ctx.setDebugInfo("error", e);, F* \* t. H& W3 Q- f- d" H
- }* @! R9 R. q L) i* L
- }
! G7 u5 A; t: I' S5 h: E( ]* \ - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
& z8 w. P; v. C - th.start();' o( w# ]: g& S6 c
- }
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' G" |. T2 U* r) f+ d8 o- function render(ctx, state, entity) {; E* Q+ h- f$ S/ }2 J3 e! }2 p8 f
- state.f.tick();
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& X; v9 A" i2 r: x7 X# p( @, n- function dispose(ctx, state, entity) {
, O z: F* S# j- d2 \ - print("Dispose");
( b5 ~# W. R0 K E, _* L$ [% M - state.running = false;0 U* M; }0 W( ~
- state.f.close();
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- function setComp(g, value) {2 X6 x" l/ L( u7 V
- g.setComposite(AlphaComposite.SrcOver.derive(value));
1 H k4 n. M. B0 i# J - }
复制代码
! `) g E. P- |; ^' N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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9 B5 z7 y$ a. L, n3 ]顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)) t( ]2 J6 v' X0 J. E9 S
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