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. N# J6 a3 H7 f; [! Q" K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。
7 F0 s% w& t, l- importPackage (java.lang);9 r( Z, M e8 h; r
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));! R; z) \) N% ] z
5 i4 _6 x5 A3 T) k% e- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);% g) p$ b2 z! l3 u. [
5 Y& y% g7 n( F, |' ~8 y9 o7 j) l- function getW(str, font) {+ B* Y, G3 n& o8 b' ^5 w$ V
- let frc = Resources.getFontRenderContext();& b9 \; K& m# }" z& J$ Y5 r
- bounds = font.getStringBounds(str, frc);
' \+ j# _! f8 l- M" E - return Math.ceil(bounds.getWidth());
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. a6 R" e; [, v$ `* q5 _- da = (g) => {//底图绘制9 t; l B% D5 m$ c' g1 U7 ^
- g.setColor(Color.BLACK);' d0 M6 t4 t' _# t0 V$ A e0 q
- g.fillRect(0, 0, 400, 400);
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, `) Y, F0 ^; ], k* D, ?- db = (g) => {//上层绘制: G% f2 e0 i$ O B, y: D/ j) d
- g.setColor(Color.WHITE);
7 y* a, A+ _3 Y' p4 w& K8 J - g.fillRect(0, 0, 400, 400);1 e9 R) u$ m! ^* E+ d
- g.setColor(Color.RED);
. [' Q9 ?$ v) [) H# H4 ^6 |% Z - g.setFont(font0);$ D) r( Q4 Q4 ~+ _
- let str = "晴纱是男娘";+ R: V% ^" i7 a2 }% i6 U
- let ww = 400;7 j; {& G. p! W- Y# C
- let w = getW(str, font0);
; v9 o4 n; k3 c3 A - g.drawString(str, ww / 2 - w / 2, 200);
% L3 u* L1 l0 P9 x - }
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- const mat = new Matrices();" x9 b+ u! X9 ]
- mat.translate(0, 0.5, 0);
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$ X7 E G' M/ Q" X0 _0 o- function create(ctx, state, entity) { q3 E0 o. ^( x0 {- @6 A
- let info = {* s r- Y" E+ |8 g/ r) I
- ctx: ctx,
3 ?9 N0 G0 \6 J: B: l; t5 h* q" G - isTrain: false,5 a" Z! f2 u& R* \; r1 o/ B* k
- matrices: [mat],
6 N/ L% O0 ~8 ?. g7 ^+ o - texture: [400, 400]," n5 k: }4 W5 |! S5 H. O
- model: {
9 D9 p6 [$ D3 l' h3 x7 C( `5 F0 \ - renderType: "light",
- M+ i. L/ [% g0 `5 W0 D' Q% [, X - size: [1, 1],# k5 V' I7 v$ x% F; H( X) ]) Y( N
- uvSize: [1, 1]
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- }
; @/ n! x* _ T& H/ P; l - let f = new Face(info);1 V8 E$ k1 z& R& Z' U2 |. F
- state.f = f;
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- let t = f.texture;5 v y; L3 k( a* s4 u9 ^2 C
- let g = t.graphics;
/ e4 U4 v* D, X6 i8 I9 \* E - state.running = true;
' ~. a7 m/ S2 h6 N - let fps = 24;
3 ~+ C0 L) t4 k3 f/ e - da(g);//绘制底图: i$ M' c4 i6 O g. s
- t.upload();( ?9 s. v, x9 |! \7 b0 j. ^
- let k = 0;
/ w; L! @* I2 u e7 c6 N& M; X8 |" b - let ti = Date.now();
- _2 l X/ r+ \2 e - let rt = 0;- ?8 ]" f6 B! H# o; v. g' G
- smooth = (k, v) => {// 平滑变化8 X* C# O: Q. J& v0 _& i
- if (v > k) return k;5 {7 j& C3 H' p. ~; H
- if (k < 0) return 0;
" K% v5 J; J3 h1 _" z. n - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;# M" D9 g% f5 ]" Z" P' I" G+ g5 L
- }- z1 v9 V: O+ @+ e0 f5 t5 A* \
- run = () => {// 新线程) t$ J3 G) S a
- let id = Thread.currentThread().getId();
+ G8 }) D- {! x" U9 b - print("Thread start:" + id);3 o3 q% x1 E2 T5 Y8 K
- while (state.running) {
! S$ C9 z6 K( E6 A! q7 R - try {1 H: W. [& N6 d, ~) i; O
- k += (Date.now() - ti) / 1000 * 0.2;
& q; r+ M1 N5 y( Y+ z+ } - ti = Date.now();
9 w) C' F% @) v: [, F& x - if (k > 1.5) {
. |4 a1 X' Q( }. R/ I - k = 0;6 ~2 T0 h3 F* E. f" Q
- }! ?5 U( q5 H9 W$ H! U Q
- setComp(g, 1);
$ x6 j0 u3 d( q, C8 D - da(g);
6 w g9 o- R! M - let kk = smooth(1, k);//平滑切换透明度
/ ^& n+ ]' p9 h4 @ {' Z6 X - setComp(g, kk);) e$ O; [( C! ^- g6 W7 W
- db(g);
2 g- o& ?8 S8 v% b. v - t.upload();
5 ^$ z1 X& s: W- I0 ^1 m - ctx.setDebugInfo("rt" ,Date.now() - ti);9 U* a2 X1 z6 C; L5 i( v
- ctx.setDebugInfo("k", k);
( n; y& G( D+ @/ d4 } - ctx.setDebugInfo("sm", kk);
8 z0 s6 J: Q3 Q5 _2 F9 I7 Q - rt = Date.now() - ti;
/ o. F8 e1 L( Y, i* s: @) ` - Thread.sleep(ck(rt - 1000 / fps));
7 X% _* Q/ Y" x, {; j" P5 g5 o - ctx.setDebugInfo("error", 0)5 U! }- f" Q' {7 ^+ u& Y5 p8 q
- } catch (e) {9 Q0 g p- U. ?7 P# ? A
- ctx.setDebugInfo("error", e);6 n, V' |4 |6 {; ]7 U7 P8 N
- }
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- print("Thread end:" + id);
4 `( ~) m# K5 n% d9 `* i6 F) f - }
- w4 h* J. M. S - let th = new Thread(run, "qiehuan");
9 q, c1 W" d V7 O N3 P - th.start();8 X. @" Z0 ]( J' L. K
- }
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- function render(ctx, state, entity) {$ |7 l# u0 T# n' x, U
- state.f.tick();
0 w5 N- T, z2 t( s9 J$ g7 y - }
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- function dispose(ctx, state, entity) {
5 B* q8 E9 d9 A; \$ O - print("Dispose");
7 M, D, l# _2 d* Y6 l - state.running = false;+ X% ?: u( y" G7 a1 E; p. U
- state.f.close();
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- 5 T0 W* r$ Y3 _9 }
- function setComp(g, value) {+ B, s9 Z1 ]! U- M+ m4 m3 I( M" a8 B, A
- g.setComposite(AlphaComposite.SrcOver.derive(value));
4 ?8 H4 q7 k" L) m" J! _2 a8 A* X J - }
复制代码 ' S; }2 b/ |+ q( U
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。3 w5 k! W+ ?1 \& B
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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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