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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。4 y4 ]& [ i0 M' H" i2 n
- importPackage (java.lang);
% }8 H2 [! S/ |% S3 A* N" q - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));/ n2 V ~/ b, A! l
! V% O2 ~$ H3 E1 ?) Y3 k- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
1 m) n2 d2 y8 R' w - let frc = Resources.getFontRenderContext();
1 X6 k" }8 N( @9 T* x+ m - bounds = font.getStringBounds(str, frc);
$ C" W- M# H( Z" v+ ` - return Math.ceil(bounds.getWidth());
; ?2 T. r, a! a, k9 V - }
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: O' _7 Q6 f ?" a$ m- da = (g) => {//底图绘制! H8 L8 w$ N+ J# T* B
- g.setColor(Color.BLACK);
' F+ ?8 e4 {, y# [6 i+ @4 p; \ - g.fillRect(0, 0, 400, 400);* U1 W; v' S; r1 \; n5 J* r! h
- }2 I* t* i' n! t) A* Q7 Y
- / Z7 c7 z* u/ a$ o& t
- db = (g) => {//上层绘制3 ~+ g& |5 u* M( b$ n: t
- g.setColor(Color.WHITE);4 E& {5 [0 x9 [5 ]4 q: y9 d) ?
- g.fillRect(0, 0, 400, 400);" {: a, A" W. E1 s; m. m6 X
- g.setColor(Color.RED);
; F6 @% b0 I: k; ^. ?5 b - g.setFont(font0);' [" B5 A+ o' g$ ~6 _
- let str = "晴纱是男娘";
( _* d T# v* H, s' c, Z5 H& W# j - let ww = 400;
- F) o- O! d* N* M. {6 \ - let w = getW(str, font0);# h& T! u4 |6 ]8 p+ F+ K
- g.drawString(str, ww / 2 - w / 2, 200);
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& S f9 p( H9 T5 s; ]- const mat = new Matrices();
2 l) ^" N6 H( L. e. ~& ]4 Q1 W6 v. w - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {" u# K4 {1 m6 t+ B* L$ U
- let info = {" l/ l, b' X9 I. L) w% x
- ctx: ctx,3 M: I- t2 [* c. s2 E- P5 \
- isTrain: false,
/ R. z G! ?. B1 D& E* n4 p - matrices: [mat],: U+ t$ R* J1 j
- texture: [400, 400],0 _, | h$ B! y8 {( f$ [
- model: {
# \8 j& w# q2 X7 \0 m - renderType: "light"," @! I* b& F3 a3 z( W* Y
- size: [1, 1],. }2 c! ]% y) l9 Z% l" [. M
- uvSize: [1, 1]7 c4 W+ S9 T) d+ v+ @
- }
% Z) z6 l( e8 G) o: o - }
; b/ _# C/ J* c! b2 @! `2 ^8 j* g - let f = new Face(info);
2 s! T/ t/ x7 P! ]1 T - state.f = f;3 ]5 x$ i2 y+ A; y( `8 p( _
- ) [7 @9 ]8 f( F& y* I3 [! s: O+ Y
- let t = f.texture;
& G3 @$ c1 v$ n8 E: ^& p - let g = t.graphics;
( K2 ^+ W' g# N! V - state.running = true;
( `! A" I( m5 p( m - let fps = 24;. ^, D1 v( l7 r2 I( g
- da(g);//绘制底图
) A* E1 r, I; ]. h) ~/ O - t.upload();
6 Z5 L/ l. l% e% f2 I - let k = 0;$ M+ ]" C8 E- O2 C9 i( J B; E
- let ti = Date.now();: D5 N P0 D3 {
- let rt = 0;5 D3 N: I% n7 l& }
- smooth = (k, v) => {// 平滑变化1 ^! R5 O. W' J
- if (v > k) return k;
, I) M4 S6 f4 d# ^$ j. j - if (k < 0) return 0;+ \0 U1 E3 U$ I+ Y" N# N3 ^2 U ~
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: [) r5 E% w# h
- }2 e9 ]& T3 V4 j) |
- run = () => {// 新线程9 o* h) ^8 D% c% G/ Z
- let id = Thread.currentThread().getId();
5 W: G9 k" k! S0 ` - print("Thread start:" + id);
) G" L) v' G7 } - while (state.running) {
3 S* F+ x9 u; T - try {
X) U6 E2 P+ R0 ], F) {+ i - k += (Date.now() - ti) / 1000 * 0.2;; }5 F5 _+ @ Z! J1 Y# J1 A
- ti = Date.now();* t1 @- _$ l4 Y) ~/ h" d, B
- if (k > 1.5) {* j, f& h4 B5 s" e7 l8 q- Q
- k = 0;
1 d9 E( N5 ~- A" L - }
2 ?! E3 L |1 z s* }% X: q1 n6 ? - setComp(g, 1);7 n& k B, |) o0 t4 c$ p1 r- z
- da(g);* t" X9 S- m! L# N, |' ?
- let kk = smooth(1, k);//平滑切换透明度
! |7 Y; |& d4 d- V9 j$ P- i f- d - setComp(g, kk);' }5 B+ z( d0 ]
- db(g);$ A, ?) K0 n: F' P1 N, p
- t.upload();! `; l I5 H0 ~, L' h/ X9 r& P
- ctx.setDebugInfo("rt" ,Date.now() - ti);7 U4 a. X' n( [% u5 O q% B
- ctx.setDebugInfo("k", k);& L* P' P/ Y8 p+ m
- ctx.setDebugInfo("sm", kk);( |* {$ C; ^+ I2 h* V
- rt = Date.now() - ti;
Z4 m" i0 M2 D( k1 I" m - Thread.sleep(ck(rt - 1000 / fps));) n* `- n* ^- g) t& Q
- ctx.setDebugInfo("error", 0)7 c* N( Z& y4 Y9 P2 C8 b( U3 `
- } catch (e) {" {, K0 x* a/ f2 l7 u
- ctx.setDebugInfo("error", e);9 Q' R- d/ F4 J- F: M! l& |
- }
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- print("Thread end:" + id);& v/ Z+ i# y6 w& r
- }0 O8 d( r* D5 H- P6 Z6 `# A
- let th = new Thread(run, "qiehuan");
; }5 U9 @+ a1 X& {/ O( E1 F4 b& C - th.start();; G+ ^0 \7 u6 o' X, E0 o# u* a0 I0 M
- }8 V) [' }1 N. G% w3 Q7 {# p2 u+ |
6 O% Y+ m. i- M9 K; j x- function render(ctx, state, entity) {! }5 g3 H4 e1 h. k4 b G
- state.f.tick();7 t! P1 a% g" ^
- }; ?- O9 Y6 R2 W
- 2 h) d/ b9 W! q0 W
- function dispose(ctx, state, entity) {# d) K: ~$ `+ ?* K
- print("Dispose");- |( S2 f. j1 b9 C7 B: O, G
- state.running = false;. l9 F2 v9 i5 Q7 R) l
- state.f.close();+ _/ x; P( V* T- E9 w, S
- }6 T0 [# g; k7 d) r
- 7 j6 e( j# \; H4 }* U( D; L
- function setComp(g, value) {; |# V5 c7 Z! M! d
- g.setComposite(AlphaComposite.SrcOver.derive(value));
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复制代码 / p: h7 {9 K2 o0 E1 V* 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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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)+ n! E+ N7 l: W8 E
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