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. q1 j3 ?2 F+ a! P2 L* P& i" v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。
/ f0 E1 v+ b: o/ F7 k9 L: R- importPackage (java.lang);
: B: c* Y6 f7 ^. p0 L( d2 H, { - importPackage (java.awt);
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J9 U$ D8 @; H( q- 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) {
+ _# h; s9 l) O' k - let frc = Resources.getFontRenderContext();
& N2 N$ [. k6 u - bounds = font.getStringBounds(str, frc);# K6 ?3 T6 t5 z
- return Math.ceil(bounds.getWidth());
+ t& K' F; a$ E% i( V2 { - }# d( L: f/ q1 B: R5 ?0 |( Y
" z1 e8 s; U* `- a$ I- da = (g) => {//底图绘制4 u8 G9 C0 s1 ?' d
- g.setColor(Color.BLACK);' j9 V5 D1 k# a! n, J! b
- g.fillRect(0, 0, 400, 400);3 V$ @* ?& s1 G! Y [
- }
: U$ Q& u+ z: M# Z, l2 L+ G
2 H: C4 _: L, x/ s4 \0 S$ Z- db = (g) => {//上层绘制
- x7 i% O* K+ l! P - g.setColor(Color.WHITE);
5 {2 a! V8 y# q% w" |# z a$ F5 ?; s - g.fillRect(0, 0, 400, 400);
! @" o D+ l" l! t - g.setColor(Color.RED);" b$ S6 r) r: K3 Z
- g.setFont(font0);
( ^2 x+ x+ M4 d( j: W% [# r- M$ c) V - let str = "晴纱是男娘";
3 m2 X! X# J. z6 @% x - let ww = 400;
6 S, r9 T0 }) c - let w = getW(str, font0);
, r3 O9 ]4 R, S8 o, e9 Y H - g.drawString(str, ww / 2 - w / 2, 200);1 ^) w( g: o$ |( r5 u" p1 `
- }2 g. N( `% P+ d1 _" [
' T1 U2 n* O4 {7 B- const mat = new Matrices();
- B( G; `4 x' N) T - mat.translate(0, 0.5, 0);& {" g+ ?& h* e0 Z7 r+ o
- # v* v1 v R" G9 A9 [
- function create(ctx, state, entity) {2 C3 ?6 A2 z* s
- let info = {; E$ `, n, {, Q6 _" L; ]2 e
- ctx: ctx,
5 X# n) N- I" z& E - isTrain: false," W9 [4 t1 z; @# `' w1 ^. |
- matrices: [mat],( w3 o, p% q- f' T& {
- texture: [400, 400],
" a. z2 h8 Q+ p' `; ~2 F: z, f - model: {/ a' H: N) p' v! d" m: L
- renderType: "light",
; T: x& z3 ]) }4 z9 z - size: [1, 1],
+ w. E9 e1 n$ O) O+ h - uvSize: [1, 1]
8 S: b; k" v" @( a2 D J - }
9 W. P! J V0 ~# E8 e - }; ]8 D: u. Z7 ] c$ l
- let f = new Face(info);
& @- R2 g1 A/ n# i7 U: X - state.f = f;5 ^! G9 x& w/ a( Y/ y$ |- _7 Q
0 d S) p2 q6 Y q$ h; M- let t = f.texture;& c( m" f2 `2 D/ R& r* G
- let g = t.graphics;1 P" d) M1 {$ t% t' x2 W! i1 J
- state.running = true;9 k; F$ C3 U! N
- let fps = 24;3 D. F; v& j4 T! {5 \3 T; H% B* C) N
- da(g);//绘制底图
1 C( V2 K( j0 P# x" V. s - t.upload();
; F; J! v7 b: Q: a5 c6 w$ `4 s& M+ Y4 y - let k = 0;3 i3 A* B" e& w: N( t
- let ti = Date.now();
' h+ F( {" M' t6 D' ^" ^7 Q: R/ _ - let rt = 0;1 i& a' n3 c2 P$ ~. W: X
- smooth = (k, v) => {// 平滑变化, ~5 X0 d* f- |# F2 x \+ p
- if (v > k) return k;8 I( I X2 S# o9 F" X `
- if (k < 0) return 0;* h" G4 C1 l5 {) G' P
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 b! Z2 j' ~% p5 v2 |
- }* v0 p3 y: d* m2 Z# k/ v
- run = () => {// 新线程" }6 p/ k- T9 {+ L6 d
- let id = Thread.currentThread().getId();) D+ L: a7 _1 v$ v: a
- print("Thread start:" + id);
9 |# |3 U1 U4 ?" I9 [* O' O - while (state.running) {
7 i' @, J1 ~3 _6 x9 [ - try {2 r$ F* B: u/ v5 n
- k += (Date.now() - ti) / 1000 * 0.2;
+ s2 m( }) p6 K0 Y$ K - ti = Date.now();( a* D% E$ b" o) ~% D( l4 c
- if (k > 1.5) {
! U" a# e' i' n$ [ u9 K, h. _ - k = 0;, l7 l$ G A# ?. b
- }! G+ z x$ }- m( E% x5 p# m+ P
- setComp(g, 1);5 _& w! I* O6 d$ F. {( ]: g* F
- da(g);
6 h H; ^" g; N0 x6 Y: B( @6 q) A - let kk = smooth(1, k);//平滑切换透明度
2 G$ w! u2 \: V - setComp(g, kk);* T/ J8 ~2 P4 {0 b: _
- db(g);9 A* j; l( {% w' |6 @! U
- t.upload();
+ K/ C, J' c2 N8 C7 U - ctx.setDebugInfo("rt" ,Date.now() - ti);; t2 i7 M, X4 ^8 y3 R
- ctx.setDebugInfo("k", k);
/ n$ a' [9 l9 d0 n1 Y1 e( F - ctx.setDebugInfo("sm", kk);
/ _) @; W4 O" {( b - rt = Date.now() - ti;/ m" L( s4 E1 V0 }1 m
- Thread.sleep(ck(rt - 1000 / fps));. Q9 F; v, ^8 M! ^5 a) X
- ctx.setDebugInfo("error", 0)
j2 P( R% p) P, O - } catch (e) {1 N2 S9 J; I: s; ]! r0 F
- ctx.setDebugInfo("error", e);; p/ n6 N2 q! I% E( W0 b0 L c
- }0 h# y7 i. C1 u' p7 l* q
- }
, I: o8 ]# y4 `( O - print("Thread end:" + id);! ^6 ^% Q: \ e- W9 ], q
- }# }# e: \$ o7 U
- let th = new Thread(run, "qiehuan");
- U" J; O W! x( Q; l1 B7 t - th.start();
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- " o7 r! T5 F4 Q1 _. m
- function render(ctx, state, entity) {
' X0 y: v$ c- X* Y# x0 W" I. H - state.f.tick();
' c8 p) ?& ?7 j" u( J8 m% G - }
; Y1 M0 t; b( @3 T7 Z - & v7 d( X% y- g/ J( D
- function dispose(ctx, state, entity) {
' k0 x- V* E( y4 T; T - print("Dispose");: s$ b5 P5 p+ L3 X( V# G
- state.running = false;' _ g) e/ ?; y$ `
- state.f.close();
( \+ p* [. D! B* @; b& @% y7 K - }
' f7 ^1 |! C2 Y3 K# r - 7 T. l; E" s, _4 ]& V
- function setComp(g, value) {0 M! L# G, E) q* K! a3 W
- g.setComposite(AlphaComposite.SrcOver.derive(value));: d) G- M5 F' J1 l6 J
- }
复制代码 5 R$ v8 M* U/ u$ B* P2 P" T# w
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。
7 h5 g0 I1 r* v% h7 d9 ?5 L% `2 x, ^* r( H
0 {- q( [' o2 d* p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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