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/ S2 O9 ~& B) s" 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。
, K5 E" |; X, c! T& G- importPackage (java.lang);
) p* h& D, k' k6 D1 L, e i9 K - importPackage (java.awt);, n. g5 Z5 @7 s5 Z
3 M% s! H, b7 {3 B" {! l8 t+ S- include(Resources.id("mtrsteamloco:library/code/face.js"));
$ y% n* W8 U8 b- z. {: v - ! z5 k7 J3 w: `4 a" e8 d
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);# }& g' J7 D6 Q% o2 m
6 s" {5 u; u% M* |3 n3 l& D6 `- function getW(str, font) {; H% h4 b c: H7 z# m4 N1 [
- let frc = Resources.getFontRenderContext();
5 z; O0 e2 _' f0 Y4 o+ o( t# a - bounds = font.getStringBounds(str, frc);: B4 g% J4 |: r" Z* r
- return Math.ceil(bounds.getWidth());0 ?5 M! x5 s" A+ p% ^: y
- }* B2 @& y$ E1 @ O' N0 W+ }
) g" k- x! l8 c) K) g5 q- da = (g) => {//底图绘制
% V5 B% Y) v$ C. ?. p7 B* m5 b* T - g.setColor(Color.BLACK);* C' D# y. N. ]! }7 `) \) Q
- g.fillRect(0, 0, 400, 400);1 M/ q8 Y$ m Q$ N" s4 N; ]
- }5 j) Y, a) |7 \4 K6 t6 G4 S
6 S$ f+ I0 Q: v3 s$ T |! H- db = (g) => {//上层绘制3 u& ]0 \; S, z f
- g.setColor(Color.WHITE);
" \. r7 O/ J6 K1 ~9 v5 e( { - g.fillRect(0, 0, 400, 400);
! {; e K/ |! \ - g.setColor(Color.RED);. f0 L* V0 n+ M w: Q
- g.setFont(font0);" p" V; R' _ t+ p( g# g! k
- let str = "晴纱是男娘";& w& R" j% B I8 {0 ?- T4 B1 I) R
- let ww = 400;
6 | d% ]% G& ]% \8 H' M - let w = getW(str, font0);
9 `3 D/ D0 V1 B5 l, v - g.drawString(str, ww / 2 - w / 2, 200);
9 L3 c! `! n$ |; _1 c& u( [ - } P1 g& R+ k* w# W4 n
- 6 t0 ?3 j3 k1 `) K6 G
- const mat = new Matrices();1 A+ T5 B2 J3 i( l) [. Y$ ]4 s
- mat.translate(0, 0.5, 0);5 ]$ b+ C0 A* }6 O
b2 x9 H0 J$ u- ?- function create(ctx, state, entity) {
8 |& b4 E+ r6 Q- b - let info = {% }# t& |7 ?% M2 m! r+ N
- ctx: ctx,$ i' C" B" k$ K$ i( @+ G7 t8 v
- isTrain: false,% R: w9 v8 X: D# p; |( {4 V2 d. E
- matrices: [mat],
l! d2 C$ E* _( c T; u4 Z - texture: [400, 400],. t. Y6 s" p( U) D8 |( x
- model: {
' ]* X0 P% n# E7 J% d. b% X7 @+ F - renderType: "light",
: S* f7 |8 Y$ T8 N# x - size: [1, 1],2 E" \! I4 B( `) v3 b
- uvSize: [1, 1]/ z9 c1 m" ?6 |7 L4 ^9 w
- }; |9 w, n" O: I; l6 ^
- }, U9 K# V3 \; p* D& O; ?
- let f = new Face(info);6 e# {$ }/ J7 O- b: ]7 N7 u
- state.f = f;, P- ~- ~( E5 X1 Z# I& U% w& F
- + S, o1 b f3 l- C
- let t = f.texture;
" O, J! q7 [" {* W9 b - let g = t.graphics;
% m; z5 q$ }# h- j1 {; a- x( G& D - state.running = true;
. c8 b1 ?5 |8 J+ C4 J7 k - let fps = 24;
. J' a; C* Q. Z2 f - da(g);//绘制底图; `5 @: r* o; n0 b, q4 T5 i+ W
- t.upload();5 H8 \, B0 W6 r5 {( _2 f
- let k = 0;! L& A0 r# C8 P% ^8 q& i+ e
- let ti = Date.now();
, x8 G8 Q$ ~: S - let rt = 0;
0 |" t0 Y7 a/ Y6 m* ]+ K - smooth = (k, v) => {// 平滑变化
) A4 O5 i/ A$ Q* L! ]+ j! K3 D - if (v > k) return k;9 ~4 }7 Y" q# Q
- if (k < 0) return 0;
% W$ [/ ^4 b3 ?* [. u - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;; U1 d2 A$ Z4 D+ z
- }* l* N1 e7 V+ w9 j5 k* p
- run = () => {// 新线程
$ G- p( ^. ]% R4 I% C - let id = Thread.currentThread().getId();, M1 l& x( a$ |$ g; n9 @
- print("Thread start:" + id);
- |! t4 r+ n1 A& y+ Y - while (state.running) {
3 K! u, j6 \" f* s0 E ^5 ? - try {
& C) W+ b4 G3 y5 }% ], L1 U - k += (Date.now() - ti) / 1000 * 0.2;% q3 U3 T( |4 J0 I/ |8 o: s
- ti = Date.now();: m0 p( b. M, k
- if (k > 1.5) {. p: G, h9 w' K. K% e8 I
- k = 0;. K3 H2 r9 W, ]# }# s$ [
- }% T0 C/ U1 o9 X" E6 S( h
- setComp(g, 1);
7 S4 S4 a9 @$ D/ F2 N: y: \6 S# f - da(g);
1 y' c+ O9 z H - let kk = smooth(1, k);//平滑切换透明度
- n/ c# ]3 {3 ^9 b - setComp(g, kk);
( u2 p7 I3 Y8 N/ b/ G8 G - db(g);
, G+ b4 g; H% w3 U l: { - t.upload();
) M8 l; T% u/ k4 X$ ]6 ? - ctx.setDebugInfo("rt" ,Date.now() - ti);# u- c- m: ?. _ W" e
- ctx.setDebugInfo("k", k);% ~% J. O9 D4 @' d* Z( z# c
- ctx.setDebugInfo("sm", kk);
% F) Q8 G5 [1 R - rt = Date.now() - ti; e' ~, e* W0 \. y
- Thread.sleep(ck(rt - 1000 / fps));
2 p' t, a4 y0 \+ |7 ?* f - ctx.setDebugInfo("error", 0)# ]8 u6 w6 u: C
- } catch (e) {4 Q- r: R" V* e. l0 X
- ctx.setDebugInfo("error", e);
9 J: H6 C/ H6 Q( o! j - }1 d# |2 Z5 H" K1 j/ Y: i
- }, R/ C" B4 ^: f9 T2 @, |
- print("Thread end:" + id);& k+ R% H8 v n8 X: j' o" o
- }7 S. Z: w- D6 J; ]
- let th = new Thread(run, "qiehuan");8 I% Z. X6 Y; d/ T3 D) g7 E
- th.start();
\2 _, y2 s( a0 r - }
7 H8 v& Y: }# l( s, V! z
7 ^9 R7 y) r5 O( ]* ~: {9 \8 A- function render(ctx, state, entity) {
% K# H: a5 Q- i9 F% q# i6 K3 I - state.f.tick();
& b1 u2 t: n& V1 F - }
' S9 a' _8 t1 K - - x' H& ^8 s3 u V: y M
- function dispose(ctx, state, entity) {1 ^7 G( O/ g* z9 _& t; C
- print("Dispose");" Y+ D/ P1 L. d7 Q" O' |! B$ e* y
- state.running = false;
1 P, R; P/ v& j0 a: F - state.f.close();9 [; i2 k( s( ^- n: J
- }
/ f% T6 ?4 _% ~6 ]( l4 |: ?
8 a3 n& u4 S: y4 k- function setComp(g, value) {
* _& C9 F( C0 P9 b - g.setComposite(AlphaComposite.SrcOver.derive(value));
% S) M3 d) I/ m7 L. ]9 {: ` - }
复制代码
+ f0 G/ O; K& b, R) O8 t6 _8 `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。: u1 c# b8 D3 M, a
5 b3 F/ x- n1 _7 i- C
! W8 e2 j, m3 S% {顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)* Y8 l u: p# C+ A
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