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% ]$ T' Q5 P( z( N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。
2 X+ v' F: O7 B- e5 N' r# j- importPackage (java.lang);
5 e" J: Y0 p7 @+ Y( ^) R8 h( l - importPackage (java.awt);/ t3 G1 ?3 ?9 q; J2 r8 H i
- / _3 S. F& l+ I5 c- q" i
- include(Resources.id("mtrsteamloco:library/code/face.js"));$ P0 y/ K" J" M$ D$ I9 p) O" x
+ c" T* _; e6 U- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
2 c$ \% ~2 F* u: p9 M b - let frc = Resources.getFontRenderContext();. J+ d0 S% x7 `5 s2 L- v7 O+ }# u' t2 D/ ^
- bounds = font.getStringBounds(str, frc);
: O4 Q' O* `+ U% z! c - return Math.ceil(bounds.getWidth()); K% I) U" y" ~
- }
/ }# V3 \* D6 a5 ]2 d5 Q% R$ J
& V' ^$ E& R/ N# z5 t- Z- da = (g) => {//底图绘制
' |- b0 X$ r# {% {* o - g.setColor(Color.BLACK);
# b* f. r* s7 A - g.fillRect(0, 0, 400, 400);/ N& @2 n2 S% i8 k9 |: m" u
- }
1 _3 M1 {1 z! g: u - 5 \' O9 G% @6 i8 Z
- db = (g) => {//上层绘制
# `1 g/ u# Y$ ` {1 y5 q - g.setColor(Color.WHITE);+ b+ F7 k2 B* a# b3 ? \9 k
- g.fillRect(0, 0, 400, 400);
4 z0 ?! @: F0 L' A5 ? - g.setColor(Color.RED);/ A1 {4 t- [+ C I
- g.setFont(font0);
. Z$ ^- U$ K# G( X - let str = "晴纱是男娘";
9 r. C7 J9 x. S- C6 ^6 k; s - let ww = 400;! N+ C: _% L. a; c
- let w = getW(str, font0);) b" l, L! C, L' K- J8 q u1 w
- g.drawString(str, ww / 2 - w / 2, 200);
: z) u% @7 d$ R& a: V* {4 ^ - }
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- const mat = new Matrices();4 o6 u5 J7 Y. v+ g
- mat.translate(0, 0.5, 0);; J! V5 [1 e1 m9 q. n i# b
1 |1 [ ~7 h" t t4 m- function create(ctx, state, entity) {
4 O2 D0 i' S+ Q& H' K- |1 g X# z - let info = {0 r; E4 O+ ~/ h+ T7 C5 A
- ctx: ctx,, }+ O7 R: A) O) m( b
- isTrain: false,5 J! C- M2 U4 m2 u. Q7 m
- matrices: [mat],* H- d$ D: _% Z9 A3 P) q
- texture: [400, 400],7 i% m' {& C( a2 S
- model: {1 Q# K- e; `2 R; E$ ~
- renderType: "light",
5 S& x* B- {& y8 O) m' K/ R - size: [1, 1],' C! H. h$ G, @5 K( b6 a5 w
- uvSize: [1, 1]
/ v7 v. p" C$ Y$ a* E - }7 u5 ` R$ W5 T
- }# g! V8 v- z" `. |# d
- let f = new Face(info);
% k4 J, H) W0 c7 S& v _ - state.f = f;
: ^0 h! f; Y0 Q1 N
' |9 D$ y9 h$ Y/ e7 [5 ^- let t = f.texture;! [. s; N4 l& U }
- let g = t.graphics;2 z+ Z; f; o4 \
- state.running = true;
0 b$ O) l5 s9 l( J' P - let fps = 24;' w* ?- t" u* P9 l( D- o
- da(g);//绘制底图
3 P6 S; W( x' j3 U- ~" t - t.upload();
. f, f! e5 t; H - let k = 0;
: ^& o+ T6 W+ P/ U* K - let ti = Date.now();
# V) U3 _2 U( ?; N- o+ r$ m K - let rt = 0;- q5 \4 N" N0 h1 a- N
- smooth = (k, v) => {// 平滑变化
2 B( ~ S- y" d( v3 N2 s9 [ - if (v > k) return k;
9 J/ G" R9 h( d; X - if (k < 0) return 0;
) R$ X p! `1 G+ Z( `7 ?) b - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
6 U0 l9 A0 n" `4 Q, k4 G! T; S - }- [! A& X7 l2 O7 m, W
- run = () => {// 新线程
5 ?4 E& r. Z. Q4 N0 V) ]( w& x# p( t - let id = Thread.currentThread().getId();
. t. G2 A, \ H ~( t - print("Thread start:" + id);! v/ j8 Y. e- a7 o1 u
- while (state.running) {
9 \$ s0 _4 Q" t5 d' O% | - try {
0 Y! \+ e" C" ~! @( n3 [. T) N - k += (Date.now() - ti) / 1000 * 0.2;
0 O- {1 J4 B9 c8 y - ti = Date.now();9 p. k _1 p0 i- W; }
- if (k > 1.5) {
7 R2 v8 u3 _+ o9 q - k = 0;( }5 @( Z; B1 P1 \! E" t. K
- }
& j- l9 P$ K2 K# d; } - setComp(g, 1);
7 w( v& b% {* h0 g - da(g);
, W! O# f0 L. t4 _( l; Z3 \ - let kk = smooth(1, k);//平滑切换透明度) g, K6 g S/ w5 n) B; u; _0 i
- setComp(g, kk);
* E/ g) r+ C, E0 d0 m - db(g);
( @! @5 G. E6 {# z - t.upload(); u4 I/ Y8 o. ^2 I' F
- ctx.setDebugInfo("rt" ,Date.now() - ti);
0 J, O- c+ a' y& R2 W# @$ r - ctx.setDebugInfo("k", k);6 j" |5 `: p( g1 a
- ctx.setDebugInfo("sm", kk);8 q L G4 U1 Z; T9 Y* L! N. `
- rt = Date.now() - ti;' g9 _% h, w0 ]( ?9 n
- Thread.sleep(ck(rt - 1000 / fps));
& I5 ?( V) F$ [% d5 ^1 E# S - ctx.setDebugInfo("error", 0)5 X3 E9 X9 z3 s! o) C; k% n p8 l
- } catch (e) {
: C( ?& }; @% H5 | - ctx.setDebugInfo("error", e);6 f$ i1 d, E8 ?0 w- _( c4 O
- } H: g$ a4 C) s
- }* Q0 b# S' {7 _" k+ J
- print("Thread end:" + id);" ~; K( R3 g5 ]0 r2 y
- }
! h( T/ ]$ ^4 A3 z - let th = new Thread(run, "qiehuan");
- n, N) T; e' Z - th.start();6 X# o3 Y: G, z1 F# k) [
- }. W: |: Q7 D5 n" x5 h
- & X( a Z4 `0 m& Q
- function render(ctx, state, entity) {
# @; h; P5 h% q4 `. }, a+ U( I - state.f.tick();
8 g" [3 @1 f) { - }
/ D( d) F5 b; m* G - & o7 N& G! B8 X9 f
- function dispose(ctx, state, entity) {, u) h0 k5 w# t: a7 H* u; x
- print("Dispose");
- x8 G5 D" U6 E - state.running = false;/ F5 k- B% p- S, P) l
- state.f.close();
, O9 G$ [. ~" D- Q - }
% V- f5 y! l+ y. @1 q - $ W5 B' V Q4 ~) r1 S# ~
- function setComp(g, value) {
- K. L8 C2 e3 @6 h# r" R, C - g.setComposite(AlphaComposite.SrcOver.derive(value));2 E, {# `) E- R. ?3 Y) a! h& Z7 u
- }
复制代码 ! C2 G2 h# S5 X; u" g0 ^0 k3 T" M
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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# E+ A# V4 T: |. Q1 B顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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