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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。
) G5 I* T8 [- {- importPackage (java.lang);3 ^+ i1 r$ f5 ?* u
- importPackage (java.awt);- W. Z' {" ^% {( z/ j& d$ Z4 T' p4 T( n
- 8 a( d% |2 h- s$ y9 A- P
- include(Resources.id("mtrsteamloco:library/code/face.js"));; z4 }% R8 ?, P
- 2 d* w* V! y/ v4 z9 F. i/ @
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" d( o/ Q/ y5 E+ O) z5 x: ^2 I$ ?+ ?2 D
1 {4 X/ ?# P2 Q3 `5 E- function getW(str, font) {
5 n* _/ H8 l$ V - let frc = Resources.getFontRenderContext();7 d v; q1 k2 `- G! z, g
- bounds = font.getStringBounds(str, frc);* I2 q' B* }' h% V: x& t4 g
- return Math.ceil(bounds.getWidth());" @. U! g8 E) o0 [/ @, C9 ]+ O# p* C" F
- }9 N' |& T* B# M0 |2 @
( W6 F" Y) [0 J) k, J+ g- da = (g) => {//底图绘制8 [7 g2 ?) J$ K8 b+ ]
- g.setColor(Color.BLACK);/ V! s0 R& \6 w* ~+ ]
- g.fillRect(0, 0, 400, 400);
( j' I; z# l9 o - }' C x( s* l7 I; [7 @
& Y z0 G6 n" y- db = (g) => {//上层绘制
4 d- A! ^6 p1 J) N - g.setColor(Color.WHITE);
4 r6 s. m+ U; P: U4 G' n - g.fillRect(0, 0, 400, 400);, [& ~3 H0 Y: w
- g.setColor(Color.RED);
% q) l1 t! C0 v - g.setFont(font0);/ i5 S3 X& O% U0 L) |
- let str = "晴纱是男娘";5 U8 j# ?1 W( E z+ V3 L
- let ww = 400;8 t- _: H0 S/ n& g' l
- let w = getW(str, font0);9 v( N& X" m$ ^+ g6 j
- g.drawString(str, ww / 2 - w / 2, 200);
4 _1 E) j" N* c5 m - }* g7 H1 ~" k" U, T. J# [
- , i) c, z! Q+ U
- const mat = new Matrices();
0 v' f, ]7 K2 O( B, Q% z3 Y- | - mat.translate(0, 0.5, 0);
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3 v: p. P5 M' T- function create(ctx, state, entity) {
8 W9 j; v0 m' a ]! U; D# R0 x - let info = {( B0 E! L0 R" o4 r L+ g
- ctx: ctx,
! c3 ~0 c+ c3 h. @ - isTrain: false,6 a, {" {7 N& B# @4 q
- matrices: [mat],# l! \9 T ~/ V
- texture: [400, 400],3 T/ B; \! f7 M& M$ ^
- model: {
1 W. {! s" C9 k# |9 z- A6 W3 z - renderType: "light",$ H5 ]/ ` t& J# D! D8 l
- size: [1, 1],
: Z4 U- f: V( N. L0 `' k - uvSize: [1, 1]; y. D6 o3 Z, r
- }
& @/ E0 ?& Q6 h$ W8 U3 } - }
% W6 g } f+ J" }) j( h - let f = new Face(info);3 _, b( o+ v( Y, s. R8 |) r6 b
- state.f = f;$ V* l9 X! E$ A3 N# H. L
& A/ \& O' j+ H7 K# Q# G; O, `- let t = f.texture;- G8 I) U: s/ O1 \/ G8 E
- let g = t.graphics;
: g0 K" l0 P+ H( d/ D# L; x5 t - state.running = true;
$ o+ x4 O' x9 a - let fps = 24;
# B& u- G2 X% Z# A% L! x - da(g);//绘制底图
, {8 j8 t+ s6 j$ ? - t.upload();
& S w. w( [; x1 l, O - let k = 0;3 f p6 u/ c' i: M9 ?- u
- let ti = Date.now();6 j# {! U' n% x3 K
- let rt = 0;: `0 j# G# M$ M
- smooth = (k, v) => {// 平滑变化
8 k1 s# O5 s1 P5 l# i$ B - if (v > k) return k;
# f$ }" q- }" l* P - if (k < 0) return 0;
4 ?7 E$ h! N! h6 n4 Y - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
, X+ H5 E: I2 D: n) W - }& P$ `. f4 z- a2 Q+ e; p
- run = () => {// 新线程
, U( C/ N# ~7 r8 T- s - let id = Thread.currentThread().getId();4 t* ]& t# Z0 a! |5 K
- print("Thread start:" + id);. B9 X: ^# E$ Z0 ^% v
- while (state.running) {; u9 s; S& h, m% d7 z
- try {' _& X+ U0 ?8 @+ s' V
- k += (Date.now() - ti) / 1000 * 0.2;
+ a& Q6 |' _' m+ N, I - ti = Date.now();
$ q% I2 ?# t9 O/ X - if (k > 1.5) {3 w" y; j8 M2 W8 H3 Q
- k = 0;
: A+ t: l$ `8 W& m& [% e - }/ V* G- [5 E$ P8 t# f4 |
- setComp(g, 1);& r' `% d( s4 a5 _# \
- da(g);4 i1 P2 r/ m$ d+ i6 n: {0 s
- let kk = smooth(1, k);//平滑切换透明度1 Q% m9 F" [0 [3 V) |, v( ~" h
- setComp(g, kk);
' E+ r3 n7 U y! T - db(g);# {" q2 b' z3 a6 _0 Y) j
- t.upload();
) b2 Q, A% V0 h3 u) K - ctx.setDebugInfo("rt" ,Date.now() - ti);
( X2 [0 Z+ f: h2 o! N: T q" \ - ctx.setDebugInfo("k", k);
& U ^) H6 ^* q% u - ctx.setDebugInfo("sm", kk);9 g$ ]9 v/ \$ f4 }' f, G
- rt = Date.now() - ti;5 J& U+ R8 K8 A; g2 p; G
- Thread.sleep(ck(rt - 1000 / fps));
3 p, m/ G8 f1 L - ctx.setDebugInfo("error", 0)5 j. }, [( F" t' w2 l4 q
- } catch (e) { i8 R5 |' [! ~5 }0 ~- Y/ I' V
- ctx.setDebugInfo("error", e);1 M# W. h6 [6 d+ `7 \6 e
- }
( s9 w3 _0 l$ f. v7 N* v - }0 ]1 ~( |0 g8 F+ ~+ I2 N: H
- print("Thread end:" + id);( o. d8 G! q9 p" O% V
- }
) k5 a% w7 \" {4 T' f - let th = new Thread(run, "qiehuan");7 S3 @; d1 ?- a. }# `
- th.start();8 Y+ F' c% O6 l* B! M) z L2 z/ b
- }
$ a' s" Z; t N3 `
0 l( w2 T8 `% `! {! G- function render(ctx, state, entity) {
/ i }+ C" a2 ~% a, s6 j1 b - state.f.tick();
. [( h& n m1 q. x8 F ~0 Q! e3 C4 t - }& q, [& V: s* |& g
- : N% x0 |, @: ^' v `
- function dispose(ctx, state, entity) {& a3 |, w; |- l- a% {% G$ Y, A+ W4 c
- print("Dispose");
: A3 T% Q; s8 ]+ J' |( i. K1 n$ I - state.running = false;
( t. a0 ?, F9 O w+ c# k - state.f.close();+ X# m7 ^# ^3 ]9 E( ]
- }, J5 w2 G2 N3 E
. Y; U, [8 R4 Q, p- function setComp(g, value) {
3 R' c2 q( }3 `) K6 k# z - g.setComposite(AlphaComposite.SrcOver.derive(value));+ F. ]9 P, s# i; ?& ^
- }
复制代码
1 E$ X4 L m9 S* w7 h# ?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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# ?+ m* @5 X6 w9 T; S( B- e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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