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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。! M" I; Z A. f B+ ?
- importPackage (java.lang);: X: x% t/ S7 \) b; k
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));3 |7 \7 |( @; Y
- $ j- K. g; P _8 A5 P6 k
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);0 n+ b, G# p! d" I! B
- 0 }9 a0 e+ C' d- V; Z
- function getW(str, font) {
; h7 Z, P* r$ w E - let frc = Resources.getFontRenderContext();
! A& C( \/ Z; K; ]; s( y( K0 P - bounds = font.getStringBounds(str, frc);
" U! n4 @% {8 e$ t7 [$ \ - return Math.ceil(bounds.getWidth());4 `, x' i! s6 l! [4 r( k
- }
- P4 t/ B; G+ _ u' Y" D
/ X8 J) i. U. K/ `8 D3 W9 L3 A- da = (g) => {//底图绘制: P# ?2 H3 J/ Q" R* D: ?. D
- g.setColor(Color.BLACK);
- m$ i" _1 i0 B) C4 _% o - g.fillRect(0, 0, 400, 400);
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- $ j) e, Q) i5 k( |+ F
- db = (g) => {//上层绘制
/ q9 [8 r3 |- ^+ n$ ~7 G - g.setColor(Color.WHITE);
8 L* g, @" ]4 ?4 J ] - g.fillRect(0, 0, 400, 400);
1 f; G, n1 b9 R1 ` - g.setColor(Color.RED);- f2 @2 p! s: R4 _
- g.setFont(font0);; m5 D) z" S) L& A G) W4 x R
- let str = "晴纱是男娘";/ I7 N! `. `- f9 L! y
- let ww = 400;9 r' {! V1 n7 O. L: g3 S3 H
- let w = getW(str, font0);
F8 g- k+ J |) Y4 D1 D) w6 ?4 r - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();
! u# d2 n% ^ }0 Q+ V - mat.translate(0, 0.5, 0);- X, z; \' Y( ? S5 @- J2 a5 ^
- & H2 M! f4 h0 b& v1 O& y: F# `! S* m
- function create(ctx, state, entity) {
" H! g; X6 b2 I7 Y9 @ - let info = {; v3 q9 M+ P, y0 e6 K* M1 D
- ctx: ctx,: }4 [ I; V' E! u& w5 X, H
- isTrain: false,5 @ `' h" U! }3 X; x
- matrices: [mat],* t" \0 q( f, z$ e
- texture: [400, 400],9 l2 u7 W: a( d; _; ^
- model: {
1 U1 Q6 G$ B( Z& f5 { - renderType: "light",
. l' h B P1 W - size: [1, 1],
, _. u5 i$ ]% z) K - uvSize: [1, 1]
+ x- R$ V: j5 b9 I - }
, h) f! H+ L( N - } [% s- Q" f0 T8 ~
- let f = new Face(info);# H0 }, c) d+ B$ g- P: `8 l
- state.f = f;4 t9 Q' Q5 {8 @2 R
- f5 l: D% C# O( V0 w3 w- let t = f.texture;
5 m0 o# Z# I8 z% b* d7 H - let g = t.graphics; f" J9 w! n" {
- state.running = true;
8 P+ b6 ^4 Z3 u7 K5 p4 ~! h% U/ w - let fps = 24;
, n, t: `+ m* l; I' `. k - da(g);//绘制底图& ]4 t: Q' {+ k9 g# n q7 G8 V
- t.upload();5 a; `& m0 R& n
- let k = 0;& Q7 L; f4 N0 [5 J
- let ti = Date.now();
- A& [/ }: l! C - let rt = 0;# K! H" n! J2 P
- smooth = (k, v) => {// 平滑变化' {3 K" r. ]( u8 _& l I. `* \
- if (v > k) return k;$ m6 y) c# c, R" T
- if (k < 0) return 0;$ m5 s& t9 K. X# `5 g
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: t2 H, W( N5 R- W
- }% X* @2 h7 C( h1 ~, V
- run = () => {// 新线程9 V2 Q, ^6 L+ @% ?( r1 o4 @
- let id = Thread.currentThread().getId();: s2 }* n3 @! Y: j
- print("Thread start:" + id);: A, j& r; Z, u; |1 J7 K/ A5 G
- while (state.running) {2 g2 r# x. \( [5 L- B
- try {
% N) ^/ X+ O: B4 _% @: i - k += (Date.now() - ti) / 1000 * 0.2;. ]3 A( ~5 E7 Z6 D3 }) ]" m" T$ D
- ti = Date.now();/ W) I T6 V) L6 T0 p; ~# |* E- W' ?
- if (k > 1.5) {7 ?' |) \1 G7 E% ?7 e
- k = 0;( B3 d0 G4 Q+ c* L& W! T- o
- }& T! H( w* L0 Y7 M7 G
- setComp(g, 1);0 w3 A" A: A: H& O/ x
- da(g);/ O: D, a' x; j i# U u8 N# w
- let kk = smooth(1, k);//平滑切换透明度
8 X# A1 J: p8 O9 n' W, [, k. m - setComp(g, kk);
: M% v! e0 u4 q+ Y0 P3 T - db(g);
. V" p0 {# }; K5 G - t.upload();2 `# G1 Z% w& D4 X
- ctx.setDebugInfo("rt" ,Date.now() - ti);- |; _2 V; x; T+ @% s+ z
- ctx.setDebugInfo("k", k);
0 m% K, q% r6 F4 T8 c - ctx.setDebugInfo("sm", kk);% q8 n; X0 M+ Z8 M; a! \
- rt = Date.now() - ti;
0 {% Y ~1 H, m3 E - Thread.sleep(ck(rt - 1000 / fps));
5 I0 Z f9 [0 r, P - ctx.setDebugInfo("error", 0)
+ Q2 Y0 _. G* P6 y! G& Z - } catch (e) {
& R. t( m4 S: Q8 @8 t - ctx.setDebugInfo("error", e);8 C8 N8 ~3 U/ ~+ {- l8 y5 [* N* N
- }2 ]8 }) h- Q3 l* `
- }' ]6 M' d! R2 \! q6 h
- print("Thread end:" + id);5 f- x' U( o8 V K/ d' Y$ k
- }
J- Q- p) ~4 K( r: j- E - let th = new Thread(run, "qiehuan");
5 u2 l' _$ n' }* m6 T; h: \ - th.start();& A" u/ ^* P# v' e3 s; Y2 V" t9 e
- }
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- function render(ctx, state, entity) {
1 T$ D% C t/ u% b n# @) @ - state.f.tick();
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- 2 {7 H# w; c z* w d8 g" l
- function dispose(ctx, state, entity) {+ ~( x" o+ x5 B; t( O
- print("Dispose");
7 y) h2 g1 M" b: \ - state.running = false;$ l0 u( l! T# ]7 C- b
- state.f.close();
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- : c! D: O- x# h+ ?5 I' x: h
- function setComp(g, value) {* g. Z- u3 H6 g6 g3 B! {! h, T7 U4 A. c! V
- g.setComposite(AlphaComposite.SrcOver.derive(value));
) s( `6 @0 P& q - }
复制代码 6 r* d1 U5 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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! s" z; ~! p8 j$ {, U: a顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)' ~5 u0 C2 Q8 C- G
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