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, K2 k/ q) X7 P6 S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。) z- R1 B+ q: r" ? M
- importPackage (java.lang);6 U7 F* d6 `$ [
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);! d1 k9 W1 F& E6 j: D; U
) B' q$ i9 q/ r1 y- function getW(str, font) {/ d8 j2 F* J X$ z. O
- let frc = Resources.getFontRenderContext();
* J% ?, v: }& | - bounds = font.getStringBounds(str, frc);7 Q6 L$ i$ _3 K1 s) x {
- return Math.ceil(bounds.getWidth());* i( Y" r( a S9 [0 [
- }7 z, s( b# O2 F
- / m3 i3 ?) Z z
- da = (g) => {//底图绘制( p/ Z, ~( H! U. D- L: u* K4 e4 l
- g.setColor(Color.BLACK);
* P' v: v! _; U s' P+ C! T - g.fillRect(0, 0, 400, 400);
& V7 @, I& f2 L0 W2 m1 L5 T - }
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' o k w$ d0 ^+ q s$ w3 n- db = (g) => {//上层绘制8 L. F( d$ v" [" w% d. D+ ]- Y4 X
- g.setColor(Color.WHITE);' t9 Y, \( _2 l
- g.fillRect(0, 0, 400, 400);
3 W5 U. F, f& _, o! n, @( ? ^ - g.setColor(Color.RED);
$ ^) i1 K- ~8 H4 R2 } - g.setFont(font0);. ^- x( L# d4 V8 }
- let str = "晴纱是男娘";
R3 F$ z Q. d' _7 I - let ww = 400;( j( [2 ]0 R+ F4 y5 R/ J
- let w = getW(str, font0);
6 i. @5 f* P# A! b6 }' k3 j - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();
. w% j7 N$ \3 p5 P* R5 I7 L+ ` - mat.translate(0, 0.5, 0);
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: n: b' I. |- w0 |- function create(ctx, state, entity) {# m2 } \. O# d& o# h, W
- let info = {$ }$ t: x5 \% r4 w! C7 J! \8 m
- ctx: ctx,6 V! O( r0 U- x3 }7 e/ {
- isTrain: false,: k' p7 d, C& w. V; s+ b* L
- matrices: [mat],
: |8 I- k' `* h9 ?# z0 q - texture: [400, 400],- s4 x& e0 |( w4 v
- model: {' H: Q# O" u7 ~
- renderType: "light",% j. A) _ q _+ f3 R, X3 t2 J
- size: [1, 1],1 O1 {( N4 F1 R4 Q3 w& m" d
- uvSize: [1, 1]
, l. I0 m+ a4 d) ?; X1 h8 x - }
" i) U! ?& G. y - }
* s" U$ w7 t- [ - let f = new Face(info);
o! K; h" e# v# }4 k1 ]3 G0 {! L - state.f = f;
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' P5 F; j7 D" J; B6 r+ G- let t = f.texture;: ~2 Y- W3 K" Y
- let g = t.graphics;
( ]& q+ U8 r7 T+ z% F - state.running = true;
( {- D4 H5 n; e, R( v& I - let fps = 24;2 e$ `2 c8 S6 y' F; \$ R; v) q
- da(g);//绘制底图% R2 M5 c3 y, V- m p$ U6 {
- t.upload();
( y4 p3 l0 L( h: }% L/ A% x7 u1 W - let k = 0;
, s9 a: t; R* u8 ^ - let ti = Date.now();
) q0 _+ w8 f( B& f - let rt = 0;1 j0 a: \3 L. g) @; J7 B
- smooth = (k, v) => {// 平滑变化
3 N0 N% A+ { Y, _' Y9 ] - if (v > k) return k;
- X3 S9 q" P8 _/ x6 [ T p - if (k < 0) return 0;
q" D Y' k! K' l/ J6 D - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;$ y3 v5 ]$ e- ~- V$ J) K6 I
- }1 ?, [1 `3 ^/ P: h8 {% t/ q
- run = () => {// 新线程
2 D' G y, N3 ]9 _ - let id = Thread.currentThread().getId();
) z4 z6 ^) V! d1 [7 d - print("Thread start:" + id);) U+ R2 V. x2 ^4 L0 o7 l
- while (state.running) {
# Z3 A4 F6 q& L# W5 d" y - try {4 M$ U! q2 S2 c1 h$ z8 G" C
- k += (Date.now() - ti) / 1000 * 0.2;: o0 B) k2 y$ c6 L7 s' f, p1 \
- ti = Date.now();4 P4 N. r# Y2 H/ L5 u
- if (k > 1.5) {6 u, A* m' q9 L( s
- k = 0;5 Q5 B! ^5 J/ [
- }! k& X4 f5 k% @' U
- setComp(g, 1);
9 B5 v0 ~, z2 x - da(g);" z& ]/ V* r+ I7 I( r: G; u" o/ A
- let kk = smooth(1, k);//平滑切换透明度8 q$ r1 L3 ^8 v: m" o# S
- setComp(g, kk);! v, S" |4 f1 @
- db(g);0 s1 S( b* n: g
- t.upload();
5 e. l9 K0 i8 _: W5 B8 q1 w% S - ctx.setDebugInfo("rt" ,Date.now() - ti);' F; D! R6 W( U r1 m: N' I
- ctx.setDebugInfo("k", k);
$ ^7 p7 ~' {3 Y9 [6 j - ctx.setDebugInfo("sm", kk);
* M l& A3 p/ @3 j - rt = Date.now() - ti;
; ]. ^3 E( R5 P: U0 G7 E - Thread.sleep(ck(rt - 1000 / fps));, x7 U, A( T. D) ^5 Y( l8 X
- ctx.setDebugInfo("error", 0)8 w& q$ k( D$ \% `) o
- } catch (e) {6 Y; [4 X' e _' g. e1 V) p
- ctx.setDebugInfo("error", e);
) J( E1 {: J3 ~/ B7 _7 Y - }# }1 q" \5 m' r. T3 P6 \ {
- }
`) T6 `$ H( l; l% E% K$ j - print("Thread end:" + id);8 {* X7 h! c. Q% v
- }
8 f& U' ~( d" T0 c - let th = new Thread(run, "qiehuan");( U# R& d! x7 H% q2 t1 u2 m7 D0 J$ f
- th.start();
' b( {/ G0 Y' w# y - }
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- function render(ctx, state, entity) {3 Y, |8 b5 p& Z( |5 ~, T
- state.f.tick();" L1 Q+ I9 `5 N- T- {
- }# Z; P8 [" |! I
- ) Q9 e8 J7 ?+ ?
- function dispose(ctx, state, entity) {/ e8 h" x& a. Z# s" A+ n" M7 H
- print("Dispose");" m$ c+ _% ^; Y; \& d
- state.running = false;
2 d+ v" U/ X$ b3 N - state.f.close();
! a8 [% A; |# y) D. Y - }
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- H7 ?* t, P: E& f1 i- n9 H, ]- function setComp(g, value) {' \7 s7 p2 s) v# @, L3 [
- g.setComposite(AlphaComposite.SrcOver.derive(value));
6 M$ @4 @0 E6 ] - }
复制代码
, w' K- f( T+ I6 }% [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)5 o" q% V: ~8 m; U$ |) p+ Y
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