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7 k1 N H' U! \+ D' w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。
- L2 O6 l* T+ f& e. V; Y0 @- importPackage (java.lang);
* B" i8 L' C5 R8 ~ - importPackage (java.awt);; y; \* v/ U5 i9 u1 Q
- 3 \; M* b; `8 H2 ~
- include(Resources.id("mtrsteamloco:library/code/face.js"));) m, t! N2 E9 |! x2 S; C
- 8 ^ b0 \3 S! p+ N9 B8 v
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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1 h8 \% U+ H3 B# ]. Y( z: O+ a# S- function getW(str, font) {
% z, a. I5 M) @. J - let frc = Resources.getFontRenderContext();/ q: q" G7 a; ^0 U
- bounds = font.getStringBounds(str, frc);
5 d! p. a6 P$ @" o9 \ - return Math.ceil(bounds.getWidth()); r* @/ w" H `! y! i& }7 P
- }( V3 ^3 N) Z9 p$ G# R0 ?$ T
- 7 ]7 J! B8 @$ u# k4 X0 r( s' E
- da = (g) => {//底图绘制
' T# \! W) s/ i5 H' P- ]: Y0 n8 x - g.setColor(Color.BLACK); H& G9 _( w! \ n8 K! R0 A
- g.fillRect(0, 0, 400, 400);, R; x0 v2 ^; _* R5 d
- }8 X1 K/ w0 l* r1 ?( _9 F
4 }" `) \; k1 ~2 `3 G8 o- db = (g) => {//上层绘制
9 j& [6 x- J& }9 q& Y4 {3 H' Y - g.setColor(Color.WHITE);6 Z1 u$ G5 R. K
- g.fillRect(0, 0, 400, 400);
7 ^* P9 l+ G( q3 k/ f4 d- E - g.setColor(Color.RED);% L% y- s1 G4 r6 q
- g.setFont(font0);
( k" l9 J6 \0 ]$ o, h - let str = "晴纱是男娘";
: ~: w: |' {" w" l - let ww = 400;6 E3 z) P) M6 W! X- I+ \& x
- let w = getW(str, font0);
: S$ r4 O( K; h7 m/ z - g.drawString(str, ww / 2 - w / 2, 200);' S! o, u% o \2 f) L; ^+ n* F
- }
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- const mat = new Matrices();
8 o. M/ ]/ W! z! h - mat.translate(0, 0.5, 0);. L/ i% Z& A1 [. s, i6 S( E/ f2 Q
- " u, B% ]& f. J
- function create(ctx, state, entity) {
, ~* P! \" u/ V$ Z" T - let info = {
9 ]* U! c6 y% x* H6 Y - ctx: ctx,
: s+ ?2 E- h# X8 C - isTrain: false,
+ `4 s8 E: f+ X0 N2 \( k - matrices: [mat],
* g5 Q N8 p4 x3 F - texture: [400, 400],
2 j1 N z% c* b4 E) g' J! {* [: u! h - model: {
) K$ j2 d7 w5 _. | - renderType: "light",! L$ Z( _4 X6 C# o- Q
- size: [1, 1],
2 ?' |1 S- I) T3 k/ t, L3 O - uvSize: [1, 1]! j0 y7 O1 A! P% S2 b
- }; @0 Z P' Q. w* g
- }
5 B& i+ |: `& y9 K4 d - let f = new Face(info);
- x: ]+ ]1 [7 _ - state.f = f;1 x( E( U& x0 G: A
J' z' b4 u9 e: h: I w! {* y* u& c6 |- let t = f.texture;
/ O: k5 G& w4 {4 ] - let g = t.graphics;- Z: j3 T4 L* O7 _9 R# _
- state.running = true; z7 t! |( {$ }
- let fps = 24;
9 |9 B6 U9 }: U* d" x6 h. @4 ^* h - da(g);//绘制底图, {* a. w2 A" a5 c0 X1 f4 f& [
- t.upload();
( t1 U. r* B( B( s2 x$ a ~ - let k = 0;7 q1 y$ G( x4 G. a
- let ti = Date.now();
& r/ d3 |4 d5 K2 k- x# d& r# A - let rt = 0;
* G, Y: X6 F9 c+ M - smooth = (k, v) => {// 平滑变化% ]" a( @0 A. e) v' ]
- if (v > k) return k;# J, j& I4 g6 M) g h, P+ X
- if (k < 0) return 0;
- ` I; f' X- E - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;9 j8 R8 b |* l4 Z, G, j" U, ]
- }. e$ ?6 v5 h' Q, h
- run = () => {// 新线程
6 q* r! O5 `8 \% U0 r$ M- ^% c! p" [ - let id = Thread.currentThread().getId();
. b# W8 }6 p% v - print("Thread start:" + id);! a0 {' f1 J z; F2 ?/ k8 k$ A
- while (state.running) {
3 S+ D- ~6 g, r/ t - try {+ e! M9 o) X! \8 D
- k += (Date.now() - ti) / 1000 * 0.2;5 l' u3 \9 n3 H3 v7 a
- ti = Date.now();8 K, v: l/ |3 y4 N" g" i8 i
- if (k > 1.5) {1 v" b; U' J. J6 l1 O# C# M
- k = 0;
: _, c9 v9 B5 C! C0 c( V - }8 J6 g* V8 E- @) n& m. Q/ [3 | l% I
- setComp(g, 1);
3 A: {; b) T5 f; L - da(g);& z$ M2 A5 T1 W3 l2 I r. o4 Y
- let kk = smooth(1, k);//平滑切换透明度
& i' O* {3 h/ f) S: V - setComp(g, kk);3 ~" H5 [/ m6 R) w3 ]2 |: ^
- db(g);3 P( E4 I$ Q' A* Q3 J8 P/ N
- t.upload();& P8 O. E: w/ e5 g2 g1 o& G
- ctx.setDebugInfo("rt" ,Date.now() - ti);
( k9 A! O' a# m9 @0 d- } - ctx.setDebugInfo("k", k);
g2 h8 g2 E- W0 H( L" ]. ` - ctx.setDebugInfo("sm", kk);
( H8 Y0 e K# {8 q) e+ O D; ^ - rt = Date.now() - ti;
5 {/ N! V' V0 q; x - Thread.sleep(ck(rt - 1000 / fps));4 U2 T: I' `* i7 u; M0 I
- ctx.setDebugInfo("error", 0)
+ L! |. f' d! X9 n# b2 \% X - } catch (e) {
, A9 D% i) i* p& Z4 n - ctx.setDebugInfo("error", e);& r$ p/ [$ B8 K, u* j+ Y
- }
4 T8 z+ ~/ X6 w6 | ^ - }
6 s; U0 P9 z3 C: _$ U1 `+ N - print("Thread end:" + id);
, i% l* `1 u$ [7 l* Z$ ? - }
- T5 M. w& o4 s O+ |/ p) _/ } - let th = new Thread(run, "qiehuan");& v& ~1 Z1 d% L; X# v# f6 U) B
- th.start();
- \+ ?- c8 I4 W - }
5 i) F' F; g! l; P - 3 k* E* A' G7 s
- function render(ctx, state, entity) { ?3 V7 q _, _' E" S
- state.f.tick();" F& Y1 s9 `- r0 n. n/ f
- }
- j7 s, k2 O+ u; e
( T3 x4 w6 B# \! X- function dispose(ctx, state, entity) {
7 c; ~2 [* w" v' O - print("Dispose");
1 z- A6 `8 o3 { - state.running = false;* G) ~ J+ {$ r( ?+ `
- state.f.close();6 G7 z) |9 a+ ]9 z% |
- }7 b/ c3 R4 N3 W: z& J4 L7 ~
- 5 {+ M3 S% ~# [
- function setComp(g, value) {
+ g: x) Z5 r$ [. [8 ]8 ] - g.setComposite(AlphaComposite.SrcOver.derive(value));3 n" A9 f% i* r# P: |6 h
- }
复制代码 7 `( q" J7 x+ I- `
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。$ x8 q6 ~+ H, P' E: m! U+ O
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, y! K2 l+ o, x2 S5 w! K u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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