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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。( x3 F% q) n. n/ k5 b
- importPackage (java.lang);
) G& [; |* W# K6 p - importPackage (java.awt);
- {5 A- `- v" H8 Z, r" l# v$ P5 y: o - 8 y) L2 [( \& k! q* w y" t, W" [
- include(Resources.id("mtrsteamloco:library/code/face.js")); s& n4 T/ L6 {) a
: Z; h, v# ?. N' y+ o W- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
& o5 h7 [. r/ |- _0 n
, V4 R8 U6 n% t- function getW(str, font) {
* F' Y, I$ J: K$ h - let frc = Resources.getFontRenderContext();
* B6 q: f( C& t' ?- R6 g2 n0 |3 p - bounds = font.getStringBounds(str, frc);# W2 Y8 J% x9 c" t! _: o
- return Math.ceil(bounds.getWidth());
) P5 p# O/ j8 X; c( O( E1 R - }- I8 l: H5 Q f4 v1 g
- , m) i; C9 _. U# y' ~
- da = (g) => {//底图绘制
0 }$ r3 J- v# C. `3 g5 C- _, | - g.setColor(Color.BLACK);
3 @' a* v. k' C) ~8 @7 `: c - g.fillRect(0, 0, 400, 400);
2 L2 i7 p$ N' L7 {, F9 r - }8 T5 E/ B% q0 M" ]/ i1 M! F+ ~
k }8 u9 d" ?: Z- db = (g) => {//上层绘制& F: z! h+ D- [$ B# F7 [: [
- g.setColor(Color.WHITE);: W8 d8 ]* t8 M3 u, m( O! S
- g.fillRect(0, 0, 400, 400);
# G S0 j }5 i8 C- S - g.setColor(Color.RED);
% |( l3 v+ d' B9 [ p( ` u - g.setFont(font0);
@' R. o8 X: M# w2 A* s - let str = "晴纱是男娘";0 m; A1 G: x# V/ Q. s/ r, f
- let ww = 400;1 C2 I( u. t( o8 w+ c& W, r6 I4 N4 I" U
- let w = getW(str, font0);
" D8 s' M9 d1 `! X# i, W- c - g.drawString(str, ww / 2 - w / 2, 200);8 q# [; d4 ~7 y5 N( r% h
- }
4 V2 N3 a# `' k3 p7 r) P' C
0 g0 }1 z7 m" y" _7 q; V3 S' U2 i- const mat = new Matrices();
+ ^ ~' G( f8 S' M, I2 T - mat.translate(0, 0.5, 0);
3 w0 J+ G2 N8 @0 d7 U4 {
0 g$ y0 ~! G' T s- function create(ctx, state, entity) {5 W2 U# ~. Q0 q0 a- }' }2 x5 f+ D
- let info = {
/ I [- A `- J$ r' } - ctx: ctx,8 g9 P3 B1 K/ [1 p
- isTrain: false,
) o" C4 c& \5 q2 G - matrices: [mat],- Q* O( @# W: i5 @8 g( W/ Z
- texture: [400, 400],
& S% x) T. v' \5 D# G7 H - model: {3 J' F( |# U- w% }; q2 e' s) E
- renderType: "light",
/ O% ~' r" {1 i& U& w# }3 A+ @! Q - size: [1, 1],
" z6 u9 s+ ~% t' l; V8 X2 i; } - uvSize: [1, 1]
% G) K- O: g5 f0 i - }$ }- s1 @8 w" }5 Z2 M
- }
0 j$ r% H0 j% u - let f = new Face(info);* X% f5 v! q7 B3 u& q# c5 e# S. V
- state.f = f; \* q, o4 s( c3 P3 X* y
- % r" O& k+ w b |) p D( t6 }7 U) p
- let t = f.texture;. Y' B9 Q& d/ C! E1 z
- let g = t.graphics;$ l+ _% ?1 F# ~" K+ X9 D" u
- state.running = true;4 c, f6 m: z. x. [! Z' p7 N2 V' d
- let fps = 24;
4 t- D* ?5 ^) k* G. l3 ] - da(g);//绘制底图, [1 D9 j0 k; _2 C7 @- O
- t.upload();5 p1 {; f# S; a) \* R# K
- let k = 0;& {) z0 H" R" }6 I- P
- let ti = Date.now();
% r" A7 j( ^4 p1 ?% e# M1 x - let rt = 0;
8 H. Z. n/ S. ?3 h" y( Y - smooth = (k, v) => {// 平滑变化
* ]0 P4 k; L! D, F/ t: B4 c - if (v > k) return k;
* l: b1 c& [' k: F% D9 R - if (k < 0) return 0;
/ U. L& h% T4 |: W$ B; J - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
& @) d( |) h2 R( r. A" { - }5 M# L! z7 t" B0 |; J4 F
- run = () => {// 新线程! ?* ?1 k7 p3 c/ R- V5 u8 R) k) ]
- let id = Thread.currentThread().getId();
, G! _3 z% p1 `6 R" F1 ^ - print("Thread start:" + id);
+ B; F9 c+ e4 G5 s3 H y - while (state.running) {3 ?* V P/ z7 o* K& X0 w( X, O& x- }
- try {7 S4 u* }' @0 G+ G9 E6 m
- k += (Date.now() - ti) / 1000 * 0.2;$ i+ J* n% u' I' z* u
- ti = Date.now();0 @# x. e. R4 \2 |
- if (k > 1.5) {" F8 t# D+ V4 Q2 k4 o, x: w
- k = 0;
& S) M9 t0 R1 W f- Z - }+ o l4 D1 R4 k5 r' x n6 y
- setComp(g, 1);
8 X H5 C$ }$ }: W3 T - da(g);
" e- r; |$ t, Y: B8 ]& ^ - let kk = smooth(1, k);//平滑切换透明度
O! Z1 e9 T3 s' p' \ - setComp(g, kk);* O$ a' \6 ]& ^( v K6 c+ X k
- db(g);
2 q6 T- B; @5 @$ b* X1 M$ x - t.upload();/ ~; S; j y% U1 ~0 @
- ctx.setDebugInfo("rt" ,Date.now() - ti);
- l" l2 [2 k" P( Z9 \ - ctx.setDebugInfo("k", k);
7 K( r3 L- D* g2 x- d' B - ctx.setDebugInfo("sm", kk);' [6 O a8 [& Y3 f2 ~
- rt = Date.now() - ti;# d* Y( j9 N, [! K- ]+ |* Y9 o
- Thread.sleep(ck(rt - 1000 / fps));
8 K. i5 N0 M6 D. w! W - ctx.setDebugInfo("error", 0)
$ }9 Z9 w) E C7 W* Y - } catch (e) {
: Q2 k8 @) j7 A& M - ctx.setDebugInfo("error", e);
! C1 ~' B, _5 o, U4 _; o% y - }0 i; G% G% L1 Z3 ~5 n
- }3 ^7 ]; S% t7 L
- print("Thread end:" + id);
- U3 N* m7 D+ X/ g - }
0 s' X/ }+ N* h$ x5 V# C - let th = new Thread(run, "qiehuan");
( S& P* y$ ]5 c) r4 t - th.start();) j) n( B" T% l( I6 H
- }
% B2 j; F5 j0 J" |( a6 M! G1 _
; z4 [, p! f- e; i, d5 x! \ w- function render(ctx, state, entity) {
! @/ z, ^: M; J# _ u8 ?. z& O# t - state.f.tick();
0 }5 f+ ^# j8 P9 N - }' X# i* n4 \) l/ }- i% b
- 8 Z9 }7 `6 b9 R p! V3 t
- function dispose(ctx, state, entity) {
9 H% w9 S+ q0 c; m - print("Dispose");! {* ]& B5 M8 d" \
- state.running = false;" C. H" @, h& K9 u) @' w
- state.f.close();2 F4 Z* {; A, \& @2 ^% d
- }% \" k/ W9 ^- o5 P. |: O0 n& j! B
- 1 g# Z9 _$ [5 K/ v, Q: c
- function setComp(g, value) {7 V/ _ r" z6 A8 ^( T
- g.setComposite(AlphaComposite.SrcOver.derive(value));
I' E/ L" W7 \1 ]$ y" _* p4 S - }
复制代码
, O* a* g3 [% M! [+ Q3 L, V2 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。& k+ D3 F6 z8 T4 Y& \7 a; e* P
" H9 {2 v1 M/ y% B% R
; f+ ^+ }# V: ^( X0 l顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)2 l8 s8 D' O4 B4 R/ |/ ~
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