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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。3 ]: c+ I# k2 Q0 K
- importPackage (java.lang); B& B$ p( t$ W5 j p: p
- importPackage (java.awt);
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1 @' U# i* c2 L8 {* s( n% x! Q- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
: [ s4 n4 t2 c2 ~+ K/ k7 ] - * z2 V7 L- e& y1 {5 _0 Z
- function getW(str, font) {# H: h# \' l! L! g
- let frc = Resources.getFontRenderContext();' k8 s7 b. `, d! T2 {, Y
- bounds = font.getStringBounds(str, frc);
6 Q8 k, y) h6 k- x+ ?+ i# s - return Math.ceil(bounds.getWidth());; V; C! S& @& E3 m/ v2 W
- }4 J8 s$ W$ w6 ?" ~; C+ h
; s, s; u6 u6 c. q- da = (g) => {//底图绘制$ v- L0 H" c/ I+ }
- g.setColor(Color.BLACK);
. ?+ Q; n/ |" v5 ]( z - g.fillRect(0, 0, 400, 400);: j9 ^* F# O" l. w
- }8 d$ f8 w4 q/ J. m, I
- + Q3 D# v( S! l4 k3 ?& Q
- db = (g) => {//上层绘制
4 E4 @5 o" S# m/ M& @ - g.setColor(Color.WHITE);
+ A6 Z3 [* W8 v( Y4 y, c# Z% h; c - g.fillRect(0, 0, 400, 400);
+ X; m5 C! y2 ], z# K6 m - g.setColor(Color.RED);
( ]4 T- L! C+ Q - g.setFont(font0);' J, @/ y+ w6 ^
- let str = "晴纱是男娘";
& i5 v' }7 I0 _7 E - let ww = 400;- X- X& f% ?8 r
- let w = getW(str, font0);# p& r0 G9 V4 \0 J# J: N
- g.drawString(str, ww / 2 - w / 2, 200);7 n* X9 [+ g: i# N- v! x' Q4 T
- }
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- const mat = new Matrices();6 p5 ^: V% X# J$ i: L
- mat.translate(0, 0.5, 0);; c# R w1 T+ D0 t) y/ `! s5 U
- 7 g! g0 `7 }- K7 A
- function create(ctx, state, entity) {- Y, A9 ^7 P: M) n ?- w8 K
- let info = {( m+ R& U! r( U i/ E5 H% I
- ctx: ctx,
* b; J- Z- Q/ F5 ] - isTrain: false,
$ U, Z7 Z: W0 f& Y9 L9 a0 n6 ?0 s - matrices: [mat],$ W% Q6 m) E( ?: [
- texture: [400, 400],2 Q( w2 U' P4 z% S9 B- F3 U% i
- model: {- z/ W* m- s0 h
- renderType: "light",
w& F N* {0 L; M n: G# P - size: [1, 1],3 a( [) v; p/ V$ z9 ` P" f
- uvSize: [1, 1]
/ |+ ?4 J1 d9 o. u - }
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- let f = new Face(info);
8 D! u' c9 n+ j/ z( V2 Y - state.f = f;3 V6 F o8 _5 `
/ x# b; |% B( f3 H+ F0 n6 _- let t = f.texture;( x6 Z# F2 z1 ~7 w+ ?+ n% w, `
- let g = t.graphics;
9 N" S( d& z3 w- r. Y" X% H6 N: | - state.running = true;
S, G. g5 d" O \ - let fps = 24;" W9 F( N; [4 O" _6 D1 ?) u, p- k( l
- da(g);//绘制底图
, U9 Z% n: d* B; P/ n3 _/ G - t.upload();) X3 f+ K8 g3 p$ C% O
- let k = 0;( ]& X' c7 X+ O. O; z
- let ti = Date.now();2 S5 z4 F, W% {2 p' ^, G \7 i
- let rt = 0;
* E! p+ i: d, E7 v - smooth = (k, v) => {// 平滑变化. z# {' R0 n* _ n6 `& b w
- if (v > k) return k;, W& T) q9 t( l8 H
- if (k < 0) return 0;! N' i! {8 P9 d$ R, h
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
; x0 b* Y# b! G - let id = Thread.currentThread().getId();
5 _% q% i/ N8 ?/ Z5 x - print("Thread start:" + id);
/ a3 ^6 A( |' K) z$ { - while (state.running) {* A5 |4 t& {2 X' l
- try {, P Y X' n2 n8 k1 [0 }
- k += (Date.now() - ti) / 1000 * 0.2;1 ~8 j' I- Z) p7 x
- ti = Date.now();
. ~8 G: @& M- Z - if (k > 1.5) {( Z5 ^8 ?5 [) O# e6 o: n
- k = 0;: U5 R2 g' }( C& Z- S* C
- }( x1 C8 D1 A. k+ B) d J3 Q
- setComp(g, 1);9 y- k z% B9 F- p
- da(g);- _- I0 a1 s) F# m, o( j+ B
- let kk = smooth(1, k);//平滑切换透明度# N5 z" }: k3 {. D+ G+ T
- setComp(g, kk);
# f, u! I8 \: R5 P - db(g);4 B2 g7 F4 N2 f8 [) O
- t.upload();
* Q# n: f: Z2 i5 v$ k8 A5 ~ - ctx.setDebugInfo("rt" ,Date.now() - ti);) a2 j3 h' J7 s N& K9 d
- ctx.setDebugInfo("k", k);0 k0 e0 I {' h0 x6 e
- ctx.setDebugInfo("sm", kk);. t) C+ c3 h! @0 z
- rt = Date.now() - ti;
! M' e t* u! k; C# U) B - Thread.sleep(ck(rt - 1000 / fps));
, H1 N: ], Q1 ^( C. h" g: @7 a - ctx.setDebugInfo("error", 0)3 ~8 b7 s9 ^7 } V
- } catch (e) {
. r! X4 \ R) J0 J! P, h - ctx.setDebugInfo("error", e);
8 G# v' U3 t! l7 ] - }
9 q% M3 l: @" r: X9 F - }
5 {' G0 U1 ?* ]9 ^. K - print("Thread end:" + id);# z6 p. u, I& L* G
- }
1 I( a9 q2 {- v* ?# h' D; b - let th = new Thread(run, "qiehuan");
; m, ^. o i1 q; `8 ^ - th.start();
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6 P+ o$ G9 e$ I" S6 t- function render(ctx, state, entity) {, \' v0 {6 f. e, D& T
- state.f.tick();4 i! n: `3 I7 x- I4 x$ X& F, Q# y
- }$ U% Z+ q3 L% s3 d# D# v
. L! c7 ]# c F1 _- function dispose(ctx, state, entity) {" @1 i* U R h# B: H; K+ i' s$ j
- print("Dispose");
% D! i& W" h" K7 C# w5 ~ - state.running = false;9 M( d6 G: Q! s6 u/ `: g. _, A
- state.f.close();
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7 V' X! I) c7 t8 f- function setComp(g, value) {8 s/ j4 r$ e! F
- g.setComposite(AlphaComposite.SrcOver.derive(value));" h2 |( }0 s2 K, I6 w9 f, u9 s
- }
复制代码 # O+ s6 s5 s7 q$ @
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。# J$ I( c) W" @* j4 }: W$ Z8 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)( U8 _. N% J) y. ?
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