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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。) \+ J& }( f. o& k& P$ B
- importPackage (java.lang);
' N- ~5 w- C1 b0 E- H7 w/ H - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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' S! S$ a) E( V4 d; F) y8 l: s- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ ^8 e, P* R8 U; F, E9 [4 e4 p
- 6 W6 d& Z. D# F& i" k9 e; Q3 L
- function getW(str, font) {" K, m0 s& C0 v" A
- let frc = Resources.getFontRenderContext();! q0 G1 _+ t! h6 V" l I+ l( v- ^
- bounds = font.getStringBounds(str, frc);
' @" f, U/ X+ Z% R% x* h - return Math.ceil(bounds.getWidth());
- j8 a% Y1 X2 L2 V9 R* y$ U - }! @- V) D9 ~ a) i$ s, t
* O7 y; H/ u0 I- da = (g) => {//底图绘制6 a/ U }* t% i6 i
- g.setColor(Color.BLACK);$ x0 P1 }7 w0 W1 ?! s. t
- g.fillRect(0, 0, 400, 400);
7 R% Y; A* x4 |4 J( j - }/ k2 d; @2 e+ O/ [& T9 c0 O
- [8 @1 n/ @; `2 J# c5 n- db = (g) => {//上层绘制
1 y& G: I3 R x5 E/ b - g.setColor(Color.WHITE);
3 S* L, L: I: D: T& O! w8 z# Z1 m - g.fillRect(0, 0, 400, 400);' E5 F a8 o/ _2 Q
- g.setColor(Color.RED);
" o+ i3 i/ o% l4 I( U+ |; _ - g.setFont(font0);! N- N* G( B% `( {4 R7 D
- let str = "晴纱是男娘";
+ K9 C) w+ Z% l* e I7 ~8 S - let ww = 400;
* d5 W) i5 ? ~5 A - let w = getW(str, font0);
; a' Y _2 h2 | - g.drawString(str, ww / 2 - w / 2, 200);
& b0 _& k+ p8 P8 W9 n9 n - }
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+ F9 s( i" A8 Q+ M- _- const mat = new Matrices();# j$ t) r: C1 o' ~7 W( o5 u U
- mat.translate(0, 0.5, 0);) V. R4 _3 t e6 h
- ' c7 }1 x9 d* @! s
- function create(ctx, state, entity) {
* F' q9 ]3 Y7 f( K% W: K6 O3 S - let info = {
3 `' d Z' ]; w' P( c/ F - ctx: ctx,
! s6 Z! `7 Z: c5 I" i6 o - isTrain: false,
9 n% C F5 D2 {' Y1 _ - matrices: [mat],
2 B. Y, X% \ B) z - texture: [400, 400],9 i- g, ?1 a' j% ]- T) `
- model: {
% F a/ ~& i% c+ p2 W# Y. [0 U - renderType: "light",
7 ~* k5 K0 S) ^+ E+ P - size: [1, 1],
4 D# l. K! s" K, q& F8 n - uvSize: [1, 1]3 F9 B1 l5 W' Q& H. n" m
- }
0 k+ }3 H" E/ w+ ]7 [9 Z ? - }
6 W' S$ m0 h% C' v1 {% S - let f = new Face(info);( @1 V, c& ? `' ]- P
- state.f = f;
" Y" O1 A& e! Y+ Q - ) o D( L. X( H8 O- K$ ^5 F
- let t = f.texture;
7 ^# f5 ]9 X' n( U" y- [* I8 { - let g = t.graphics;
( Y5 M; m/ |, W9 T0 T - state.running = true;
/ X3 w' d- u; r) A+ ?8 D: ~6 v - let fps = 24;
1 A# f9 N4 r" t3 I - da(g);//绘制底图& z& [9 w9 m+ D" T' c
- t.upload();
; R" I; }# B# v6 @ - let k = 0;
' j- o% F0 T$ W7 I7 K& M6 b - let ti = Date.now();* E% k7 Q$ }2 I9 U$ k& N
- let rt = 0;
. E# H5 r6 _5 e+ b0 i7 | - smooth = (k, v) => {// 平滑变化, t4 l; J9 o$ S5 f) Q
- if (v > k) return k;
6 i9 ~+ s7 P& v5 k. d; Q - if (k < 0) return 0;
4 z# b' X4 a0 k+ b x+ ` - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;# J$ p0 u( L+ b% F+ m0 T
- }
' R6 y' f5 ~+ m4 ^0 N, h - run = () => {// 新线程
5 o+ O. O0 P. C3 o/ O - let id = Thread.currentThread().getId();
) ]* G {; N7 N! t* M5 s, c - print("Thread start:" + id);
! [3 [4 q! a; f* } - while (state.running) {
+ Y2 R4 y+ `8 C* L& F! g. | - try {' P: C) ^1 G8 D. x) Y" y `8 ?9 T
- k += (Date.now() - ti) / 1000 * 0.2;
f! E6 H% g" y' g& M - ti = Date.now();; R% G; A8 |! h) s
- if (k > 1.5) {
4 `; a0 G5 p3 M6 O* h1 n, D - k = 0;
5 K6 Q1 o/ B8 K! S- f6 p0 P - }
. d' J9 e, o( q y Q7 j( L - setComp(g, 1);
& M! p: m* H& ]7 _ - da(g);! ]$ s# U, q+ H$ o+ `( }) M6 X
- let kk = smooth(1, k);//平滑切换透明度( z. p, D9 d x4 `' }% N# n
- setComp(g, kk);9 m: {7 S; H# [$ \' L; v/ k3 t) E
- db(g);
8 T! O4 x/ T) t, o6 J) f; W3 ]2 a - t.upload();5 ]) e+ t" l# ]2 T. Z( Z" C- k% |
- ctx.setDebugInfo("rt" ,Date.now() - ti);
& m' J7 _( g( L% B$ w7 V* t - ctx.setDebugInfo("k", k);! G) J- r# P% D7 ]+ X$ W- C7 K R
- ctx.setDebugInfo("sm", kk);8 w$ p6 v/ V0 q
- rt = Date.now() - ti;
, @, ]0 c7 i' U; @" O) O6 S0 v6 c - Thread.sleep(ck(rt - 1000 / fps));2 Z: |# E8 o" [: K" x
- ctx.setDebugInfo("error", 0)
3 N( L& ]3 L) X# B - } catch (e) {
; k _0 V( @3 N8 R5 F - ctx.setDebugInfo("error", e);
. v9 [; s# T5 E2 r - }
; O6 h9 w v9 O0 I. o$ F$ J - }
+ K: Y5 s( }1 W. s0 K' [: w - print("Thread end:" + id);' e) L& Q6 l$ |+ X9 j
- }' u/ H4 d. `$ G! \0 R
- let th = new Thread(run, "qiehuan");) |5 K0 b# ?" X& L
- th.start();
. \* k8 y: y5 y8 ^; h l% J5 y - }1 p5 g' e( v9 q4 h) |- B4 |
- * o0 e, e8 c7 z) B; { {+ I! b
- function render(ctx, state, entity) {
q$ S" {. S) J0 T2 I9 ]/ G, o8 y - state.f.tick();
9 N8 S, U! C8 i6 R$ ?7 F( r - }
- H+ i" f# ]; x# I4 y - 6 D* t* ?8 k+ @; _& L# m \
- function dispose(ctx, state, entity) {
- E' X1 ~! g5 Q2 U. D) I4 J9 i" B" Y - print("Dispose");( B2 k' v6 g4 \! \. m' s; k
- state.running = false;
- O) v* {: ?2 y - state.f.close();! c; J( V! d; U7 d! m: b6 n2 X
- }9 z" O# {/ G: l% d7 E$ S: @
- 4 y# |) d% u0 V; Q; I- {& E
- function setComp(g, value) {
: ^( V& O* Y$ v6 S8 L: n: l - g.setComposite(AlphaComposite.SrcOver.derive(value));$ x7 J6 H# S( V" b8 o
- }
复制代码
+ h8 U% b, ^8 u1 m9 J' |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)& G) k; T7 p/ l, c" p) A* c
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