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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。
& }1 { H6 Z' \- importPackage (java.lang);
! M, ]$ D' @$ F+ o5 @ - importPackage (java.awt);
+ x( F4 a! K$ R6 ?* J" y6 ?. T/ w - ' M- w1 S, p2 k c* K
- include(Resources.id("mtrsteamloco:library/code/face.js"));# \1 d7 o% W& t& Y* j- r! r
- 9 S0 G& k( U" u" @5 e- P
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
J. z& {/ g( p& F8 u - let frc = Resources.getFontRenderContext();
- g; D, k4 E0 |' t - bounds = font.getStringBounds(str, frc);
, K. r& G" V( T - return Math.ceil(bounds.getWidth());1 M7 b5 t5 ~0 ~9 u; v
- }( h! E+ v& M0 @& h9 j
6 L* d/ Q& {( m: E- da = (g) => {//底图绘制
( ^- `5 M4 ~3 J* I1 B' i - g.setColor(Color.BLACK);
) P. y* G( W8 g) ~ t - g.fillRect(0, 0, 400, 400);
( n, Q' W {: @- S+ ~ - }
1 b, A! U4 M) n Z/ k" f& y
; g& o- B( W6 K+ R- db = (g) => {//上层绘制" X* h6 s5 I8 X+ q. T/ w) a' H
- g.setColor(Color.WHITE);
: s* @' T F2 c" ]' L8 E$ g - g.fillRect(0, 0, 400, 400); u/ l& W$ u1 p! w9 u
- g.setColor(Color.RED);; d2 H# P' A; o2 |" Z; n
- g.setFont(font0);9 {( i/ x6 C' T7 V
- let str = "晴纱是男娘";
3 X0 C4 @0 V$ S/ p: J0 K - let ww = 400;
# [! b& x* {, j J! ? - let w = getW(str, font0);, t$ B3 j3 p9 g. }% z
- g.drawString(str, ww / 2 - w / 2, 200);
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% d8 u5 _# m1 B+ x/ Q' o- u- const mat = new Matrices();: {3 Y& p( ~$ ]' L+ A9 |! F
- mat.translate(0, 0.5, 0);# W J+ t) q8 A1 g
1 B/ S3 K+ G' ^; R6 R* Q Q0 b- function create(ctx, state, entity) {# ~' H5 b/ N4 Q" F' u
- let info = {
" ]$ y4 q& p: Z4 N - ctx: ctx,
8 r5 ]+ } j, s5 ?/ g) _1 _" @ - isTrain: false,
4 r1 I- G, Y0 z5 N2 L& n - matrices: [mat],1 C3 F: z* o. w6 q* r, |
- texture: [400, 400],- `& U7 t' Q5 k7 C6 ^; y6 @ y
- model: {
6 e: c9 ?# O" v" M/ q& ]& m* [ - renderType: "light",6 ?- s$ k0 ~+ j7 d4 x0 x. ]
- size: [1, 1],+ H; t6 y% A( [; z. X' Y; m( _
- uvSize: [1, 1]- [# V. A. p$ C
- }' J B0 _' F6 t, J7 ~2 |
- }
4 |+ l0 P5 `. N - let f = new Face(info);& v6 k3 H. p5 p
- state.f = f;
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- let t = f.texture;3 e* C( `8 N5 T b6 ~; H" v- ]
- let g = t.graphics;
W; \0 v( D2 { - state.running = true;6 l% T% W3 M) Q0 O( J6 T
- let fps = 24;
+ T# k6 q8 S! X! D i - da(g);//绘制底图. [/ @6 d# d |2 f7 U8 b) H
- t.upload();
( B/ {1 J; E! g* Y7 p - let k = 0;
1 N2 M4 v* @5 t9 r9 T - let ti = Date.now();
* b- U4 c1 e( c2 f, @/ Z - let rt = 0;
! D- N z$ _7 B - smooth = (k, v) => {// 平滑变化
& j$ l- A6 Q; \ - if (v > k) return k;; E# N9 n5 z9 P' x: c
- if (k < 0) return 0;
" A3 q& y& Y. u% ~6 ` - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
& Q# R; Q/ G/ o9 m; d - }
$ Q+ R6 f* W, Y( Y - run = () => {// 新线程% O7 ^0 O% }+ i: k
- let id = Thread.currentThread().getId();6 s+ u3 v$ _/ X/ [
- print("Thread start:" + id);
; A; {8 K, P- A$ ]* c6 m }6 W' B - while (state.running) {
: U7 b6 R1 ?' L8 @! t$ _0 H- S - try {8 u5 Y5 Y5 I6 h+ r% K8 \5 K
- k += (Date.now() - ti) / 1000 * 0.2;
8 a' L7 d/ C6 i - ti = Date.now();
1 @2 H8 T# s# b6 G+ T V! q* x: P7 e - if (k > 1.5) {; u4 @" R% P; L( z# e, c
- k = 0;
9 ?$ W5 T) a' p+ l/ Y8 \1 U - }8 W- ]1 f1 R% f# L5 g: r1 ]
- setComp(g, 1);1 {9 D4 b( h' O1 Q4 N; D
- da(g);
$ t$ m. b- m. d$ H0 m: K - let kk = smooth(1, k);//平滑切换透明度
|& M3 @* m3 S: L+ [ - setComp(g, kk);, h) A+ k$ m+ H, U1 a
- db(g);) K$ w/ o% K' i3 q/ w- V
- t.upload();8 Y( b- k5 J" M5 e1 y | n
- ctx.setDebugInfo("rt" ,Date.now() - ti);( n: B* B% i' e0 s1 {1 c& m
- ctx.setDebugInfo("k", k);; d& _/ q% I6 b. b! U2 R6 Y( B) {
- ctx.setDebugInfo("sm", kk);
5 o$ c/ X' I( C' P* m. b - rt = Date.now() - ti;: a9 I8 h2 m3 W: m6 N# m
- Thread.sleep(ck(rt - 1000 / fps));( f0 c5 H; |9 E/ N4 @6 U0 n
- ctx.setDebugInfo("error", 0)
5 l; q: n1 z$ x' y& L% | - } catch (e) {) F& ^4 @* |& a2 J; V
- ctx.setDebugInfo("error", e);( @! Y; _. ?7 H+ I2 @
- }
( E7 I6 m3 M: d3 _ - }
1 l6 u2 i+ a; l2 g, X - print("Thread end:" + id);
. J# X, H( g! U M7 d! \+ o - }
2 v' O0 k, \6 b) b - let th = new Thread(run, "qiehuan");# L& p+ q, S+ H6 I; @, z% B
- th.start();# W& ^) H1 i0 C+ z# L* k2 @& L
- }
+ l# z( T7 `& f$ g8 c& x$ t, K% Y
$ D: T \0 `- I" h" k- function render(ctx, state, entity) {- u% |% N; m9 C F
- state.f.tick();
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- 3 t6 z7 Z/ _( X4 U( Q% w* D
- function dispose(ctx, state, entity) {2 Y2 |) s+ p4 }
- print("Dispose");
& f! ^7 F4 @& V. d/ [ - state.running = false;
. H& E% M5 i5 Y/ R, ~ - state.f.close(); k4 B% P, L5 y( r2 N3 j
- }6 m0 a% u9 |+ {7 ^1 M
) n% V j, {! u9 c- function setComp(g, value) {
. S0 T9 L* [) K+ X& P# `1 D, p - g.setComposite(AlphaComposite.SrcOver.derive(value));
$ N! F/ ?4 q$ n - }
复制代码
$ c$ x9 t; L4 I& K( ?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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3 v; h% N6 f ~* f& ]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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