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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。* F: T9 J; O D- x" w
- importPackage (java.lang);
* Y7 T; A# ~9 e/ n6 y' Z6 s - importPackage (java.awt);
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9 C6 K4 P8 p7 B- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
' q3 ]; S" Q7 F! { - let frc = Resources.getFontRenderContext();
$ y5 G P' @6 V5 `. I3 j+ Y - bounds = font.getStringBounds(str, frc);
% e- _4 n+ F# M0 a - return Math.ceil(bounds.getWidth());- ~ f4 T- S0 g5 B* x& }2 ~' g/ P7 v6 L
- }
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- da = (g) => {//底图绘制
% G3 Z _6 i# s2 M - g.setColor(Color.BLACK);
" l3 O1 s7 f( u- E6 \ - g.fillRect(0, 0, 400, 400);
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9 Q; e9 d, s. e" ~- db = (g) => {//上层绘制
7 ~ Z6 v: Y1 o. ^( v% O { - g.setColor(Color.WHITE);! ]& w0 ^; `# j
- g.fillRect(0, 0, 400, 400);
* F: g+ Z" i- c u8 d7 M0 K0 H7 h7 y - g.setColor(Color.RED);8 |# a, Q: I0 D' t% ?
- g.setFont(font0);
0 C& @: g* U# N/ A0 O - let str = "晴纱是男娘";1 R: g6 S! ?$ @. \$ d. f
- let ww = 400;
( O9 }& I' |) N+ g! U7 s - let w = getW(str, font0);# x1 X7 d. `5 _; M9 B" c( c
- g.drawString(str, ww / 2 - w / 2, 200);# c+ S* P2 U' _& Y$ S7 N* a
- }4 g3 A8 p4 Y+ G1 ^ n' r
- 6 G, I* n `2 K. T8 M' ]& |; T
- const mat = new Matrices();0 F( y9 J$ c9 V) }9 h+ b( i
- mat.translate(0, 0.5, 0);, y; |( W% H6 H* Y# f$ e
8 ^) t/ A$ Q7 h% c7 N- function create(ctx, state, entity) {, ^( B j6 C3 L V& }
- let info = {; Z2 r% d+ m# [0 ] o, {9 d
- ctx: ctx,
7 g% E! e, F! }$ Q& o$ ^$ f - isTrain: false,3 u* s/ y+ X- ~
- matrices: [mat],
" \9 u0 I8 Y" e2 X" T# V% @1 t o# e - texture: [400, 400],
# @, l( C1 a, t, y+ \. f* R - model: {
) {9 d. W; L, A" n4 C5 E - renderType: "light",, e5 ~# y+ g/ ?( s
- size: [1, 1],
- |) `8 l0 k! w' ] - uvSize: [1, 1]% E2 D9 h0 V7 Q5 [
- }: `# J8 H; y1 n. _- k' L
- }
7 c) f. ]# b+ \0 p - let f = new Face(info);
9 L) N3 B- K0 O% q2 X - state.f = f;( _, @% R! ?3 _$ a. o/ K6 n" J
' P: \0 [( {) W" [# A, r1 S. I- let t = f.texture;+ ^7 i% W; c, m8 V6 F
- let g = t.graphics;# y; G6 S2 R. [8 ?( Z/ \# O9 A r
- state.running = true;0 @/ g7 F0 N# o$ `$ s6 Y* V
- let fps = 24;. u7 w- `6 y. z; V* @! @: x
- da(g);//绘制底图# Y5 m t1 Q( v- B g3 R: z6 ]) U
- t.upload();0 y- U& `. K1 J, J# o* r2 L$ P, t
- let k = 0;% m5 X$ |* s! k& {
- let ti = Date.now();% [/ ]* v9 K/ c6 m
- let rt = 0;- ^4 x8 Q, q: V; v
- smooth = (k, v) => {// 平滑变化0 h# b0 K7 E m7 N3 r& |5 f6 A
- if (v > k) return k;
. [8 W- |7 W3 N' m2 |5 D - if (k < 0) return 0;/ q* f! ~" w0 d2 g; U
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;7 Y( O( V) C7 g/ E' c2 ?
- }
* o3 K7 `) L4 {7 n - run = () => {// 新线程
, }8 d# s( \7 C6 E: g - let id = Thread.currentThread().getId();
: P. f+ R3 y# q0 H. u - print("Thread start:" + id);
- z0 B/ W" g" R; y8 g - while (state.running) {
4 r: E7 q1 S" \& ? - try {1 b2 G: p: ?4 Q r
- k += (Date.now() - ti) / 1000 * 0.2;
' Q: m' l& S" e* Q - ti = Date.now();
/ g6 X2 H. P4 O+ O5 ?7 h$ w+ k$ K2 F - if (k > 1.5) {3 i5 ^$ R+ Q) @$ O
- k = 0;
4 o, R" }( S( S" g8 X+ s* S1 I' t - }
. P( g$ K6 P0 ? y! V - setComp(g, 1);" J) e# ~7 @: {- _% }. F9 h
- da(g);
! d0 r% [) `' x* z# Y5 f - let kk = smooth(1, k);//平滑切换透明度4 t. @" }6 c P/ e8 I4 e" i: J
- setComp(g, kk);
" w8 \( G! @5 I* ^! x9 E1 S% A - db(g);
; \9 c3 d6 j; v) i' {1 ^0 w! s j - t.upload();" F# K( V) e( g3 G! ]7 V
- ctx.setDebugInfo("rt" ,Date.now() - ti);0 X8 ~# O- m- Z, S( C3 q$ M$ R
- ctx.setDebugInfo("k", k);
! f$ }: u) s" T7 V6 U. h - ctx.setDebugInfo("sm", kk);# z) c& n; u6 P% N1 m9 }4 m
- rt = Date.now() - ti;
5 W. K) ?# G/ N( c9 n - Thread.sleep(ck(rt - 1000 / fps));
. P/ Q3 E5 Y k h - ctx.setDebugInfo("error", 0)
. d: I) M4 W/ L+ G) v B) H8 w - } catch (e) {
% q+ R6 }$ i: `. r) Q$ M - ctx.setDebugInfo("error", e);- h+ z5 t+ z9 C. o
- }0 P& S) G( [: k* v* Q; ?+ S
- }% \' N) E& x7 p* _1 `3 F
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");6 p3 B) n7 [2 U, F/ b$ O
- th.start();
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- ; o" z/ r( T A
- function render(ctx, state, entity) {
/ u% r! e5 A$ W) p* T+ } - state.f.tick();
& H) G) o) q9 }, ~. v1 K - }
- }! _# T' B! i- M j! i
0 Q+ B* |# F- D, d X2 \2 ~ I$ C- function dispose(ctx, state, entity) {
4 _: {9 |) B, H8 S# f3 W - print("Dispose");4 X9 z- l1 ?/ B' ^' [1 y
- state.running = false;
) T/ @5 O- [8 Y" [6 }+ w - state.f.close();
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- 0 j# W" T/ Q2 i
- function setComp(g, value) {, o2 x# D% Y6 b# v- O. v) T! Z; X! R8 A
- g.setComposite(AlphaComposite.SrcOver.derive(value));
. p- l2 B+ |# n- f* }& q5 L - }
复制代码 9 h/ s" `- H( P& y& {. |- P
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)
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