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0 d* v B, r0 A# M/ ~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。
0 X2 E9 h5 K) Z0 ]- ?% Q- importPackage (java.lang);5 ]8 D# b; d# t- f+ W/ n- m
- importPackage (java.awt);$ v9 e" y! E" m6 a) z( Z; {
; C2 c! |: k e- include(Resources.id("mtrsteamloco:library/code/face.js"));
# x$ x% f0 }4 R. J9 \5 {: i
+ A# Y# s5 k( K7 {. F- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
# L2 h1 }* R6 I- k1 a* R$ R9 O- J' a* W
R5 s$ i7 t5 q+ S( w4 g1 E# q- function getW(str, font) {
# Y+ X: O- Q0 h& Y- C' S7 I - let frc = Resources.getFontRenderContext();8 G" g6 Y6 w' X: w
- bounds = font.getStringBounds(str, frc);* A7 ]0 [* V7 j) e; ?& I- i
- return Math.ceil(bounds.getWidth());. y: j0 U# p* I
- }
! i% ]( D i. X6 n5 h
2 a+ c4 ^1 p6 o; H3 a: d4 M8 g5 N- da = (g) => {//底图绘制9 a) H8 e9 c% Z* C i0 \# m0 Z
- g.setColor(Color.BLACK);
$ E+ c' \; m ~ - g.fillRect(0, 0, 400, 400);: o$ a. k# j! c9 J' L
- }
( i( J0 w( @9 ~# s2 ]( I9 V8 t4 ` - + J3 A5 Q" \- d' j3 m
- db = (g) => {//上层绘制4 M6 Z; l& Y/ Q0 I( ~5 n' J# v
- g.setColor(Color.WHITE);
: a) _" S+ W( e" k# _( w - g.fillRect(0, 0, 400, 400);
1 b6 s7 F* ^3 h9 U% m - g.setColor(Color.RED);( B3 B/ |. M* B# f. |
- g.setFont(font0);
6 \ Z u+ _* l; c - let str = "晴纱是男娘";
) S( j5 ^4 {# s7 ?5 [& g) r - let ww = 400;6 v* Y9 D( F7 ~$ X" x7 o
- let w = getW(str, font0);
6 Y$ E# B+ t5 e8 `6 k, O - g.drawString(str, ww / 2 - w / 2, 200);. X) [! k! \( o7 f; C' z
- }6 ]% }6 D6 x( p1 A! M* Q/ J4 z
- ) \8 f/ A) b* J! G* f6 P k2 W
- const mat = new Matrices();
) {6 @) v7 d) ]7 u J( o: q - mat.translate(0, 0.5, 0);
$ P* V$ B1 B! A& | Z - * x2 m$ f8 Q W8 W+ ]; y
- function create(ctx, state, entity) {
+ M: ^3 D+ B2 ^7 r* s6 ^& C& U - let info = {
$ `, r# O; K, V7 P( K& u* Z7 E - ctx: ctx,
- P6 Q, y) v" x; ~' z - isTrain: false,
, U4 Z% \3 X x - matrices: [mat],0 F% \6 t! |5 v: v5 I5 P9 L
- texture: [400, 400],2 H3 F, B; z; }" Z. J6 t
- model: {
5 [9 M( L9 T* l& a9 |+ N - renderType: "light",% P8 v1 v- y# Y9 ?4 ]- f
- size: [1, 1],9 ?$ j5 ]! G, v9 n2 v
- uvSize: [1, 1]
. ]2 P# K, u) N( n3 q - }( W5 J( G. @. H- H! m' `
- }
. u( r! p' A v7 i1 H - let f = new Face(info);
! ]+ c( M! Z7 }& K2 s( g& H - state.f = f;
# ^% G& G. B: b, ?5 y- I3 ^ - 3 }0 X/ `7 b) | F+ t6 ^
- let t = f.texture;& X' U$ D* Z2 P9 b
- let g = t.graphics;: H& T" N) C/ l' p. k: C
- state.running = true;1 q1 f x1 B, }" _4 _ ]% E
- let fps = 24;" u5 Q, q; m6 x# T, x
- da(g);//绘制底图, X' b- Q4 }8 }/ g9 v
- t.upload();9 ~6 w, G3 J8 d! w" `6 s" e* U
- let k = 0;
1 l9 }" i/ f* P& y/ y& m - let ti = Date.now(); F( b+ O5 C0 m' L i
- let rt = 0;+ s x2 v1 E# h
- smooth = (k, v) => {// 平滑变化
6 ?0 z2 v; ^8 R" r$ I+ q - if (v > k) return k;
: }& {) u: i5 V5 M; G - if (k < 0) return 0;2 F% J; g9 c- g, K0 U
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 W- ~) H* w" l
- }9 O& C2 g* n3 V* |0 ^6 y4 W
- run = () => {// 新线程) U3 F& {" V4 l6 i
- let id = Thread.currentThread().getId();
' G" J, d' _5 c% y - print("Thread start:" + id);
/ M/ b! u; b- D4 P' T( w3 a$ E - while (state.running) {
' s4 m" A% ~4 n4 G5 f. y7 O7 v, r: V - try {& f, }7 z3 i% s$ K! A3 n/ q. r& Y
- k += (Date.now() - ti) / 1000 * 0.2;! N6 \+ X, r; i6 C( Z9 A0 D" _0 t6 |( j
- ti = Date.now();
3 @+ B# @. t; B' b' T! w. h5 ]4 [ - if (k > 1.5) {& P# I% Q0 [) } l/ f$ O: D8 {
- k = 0;
7 Z1 L* n; f- N- s& l- ^ - }
% ~2 X! Z6 A, J* D" Q - setComp(g, 1);
0 G% E; {5 C; B+ h& ]% o - da(g);2 T8 `" a+ j4 ?" ]$ o
- let kk = smooth(1, k);//平滑切换透明度7 x! ]7 m7 q* X( ^
- setComp(g, kk);
$ G/ K8 Q- T: [4 { - db(g);3 E' S) U+ |8 G3 R3 f
- t.upload();
) n* k# x8 J: L: E# w - ctx.setDebugInfo("rt" ,Date.now() - ti);) U; D8 S7 k4 W t
- ctx.setDebugInfo("k", k);
+ y- E/ n5 F& a3 n - ctx.setDebugInfo("sm", kk);
2 \% X5 q( a7 ^; W: u7 H* ? - rt = Date.now() - ti;
# T2 {8 u' e9 S- n( Z1 C - Thread.sleep(ck(rt - 1000 / fps));
' U5 a0 Y0 y5 e* I# K& _ - ctx.setDebugInfo("error", 0)/ B% G. W# |9 a" W- ?! Q1 {0 O/ g
- } catch (e) {
* V M. U( W6 n% o* R7 X - ctx.setDebugInfo("error", e);, d* r! N4 t. w3 ~
- }
9 [3 c! N) e+ u - }
. s+ ] u7 {& N/ F" U, H - print("Thread end:" + id);: ?& O! i C* q; p3 Y
- }( c$ B- J2 W( ^- g, [7 n* n
- let th = new Thread(run, "qiehuan");$ b/ d1 W; l0 e
- th.start();: w' J" n' t0 V7 h
- }
1 u2 p" I' n, d- E7 { - ( Z- z, h/ J' x3 O5 X, H* ?3 O$ c3 N
- function render(ctx, state, entity) {
9 p4 _; m: z9 j0 k5 I6 ~0 q! u - state.f.tick();
! `% [, _& d: r - }
# p! ~5 `% {6 t, _ V& H1 V* ?; f
5 K t: P5 {- t3 C s$ X- function dispose(ctx, state, entity) {
% `- s* K) U' N! B& H1 P" A7 | - print("Dispose");
" u l( H: C, Q$ m3 S - state.running = false;
: O7 d+ i, ^4 \) P/ H% _% S9 Y5 Q - state.f.close();4 @- x, _7 H4 m4 t8 v( h
- }3 x9 V; c2 G9 l# ?8 p# r
/ \9 ]6 V6 t' e2 u- function setComp(g, value) {1 {. V, b. h* d% K7 r
- g.setComposite(AlphaComposite.SrcOver.derive(value));- S7 `& l4 Y4 d2 g: O" J7 M7 w
- }
复制代码
+ n5 |7 ^! R3 {. _ F% `9 C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。2 u, @) Y# F. ?# K& K% m
) E! `6 _1 F8 U; l0 h- }
p3 |; J1 e, r3 q$ B2 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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