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6 F! S% x% u7 |) `7 N1 ]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。8 X% J- c; ]+ `+ m( P- I1 L! W! ?
- importPackage (java.lang);
5 p; O3 Q, r& } - importPackage (java.awt);4 \8 F& b! S' C& r2 }
- . F* A3 l3 s* C
- include(Resources.id("mtrsteamloco:library/code/face.js"));
% l1 y; l8 R: h5 `) H8 G7 z
) c( M0 M" k/ U5 K- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
+ |( \4 ?% w5 l - + I) j7 U7 X0 F6 N
- function getW(str, font) {
' M( p, H G3 r+ z! A: } - let frc = Resources.getFontRenderContext();- _$ T% T9 A# p) [7 S0 E
- bounds = font.getStringBounds(str, frc);3 O3 G3 K! ?3 t" U
- return Math.ceil(bounds.getWidth());! b9 r' Y# n0 i9 @, x/ N) l& u
- }! h: _/ B+ r3 ?0 ^4 d }
- : I" I, V/ @& X5 X3 D3 f& S" m
- da = (g) => {//底图绘制
' X1 {6 x4 i5 i - g.setColor(Color.BLACK); h1 Q* |8 t9 ~# d" f
- g.fillRect(0, 0, 400, 400);
- T% z2 c/ k/ S, d - }) D# }3 i9 E$ H: N2 Y# D% K
, W9 [( R. o5 {: h3 ]- db = (g) => {//上层绘制
5 R9 {3 U% ~1 s( K - g.setColor(Color.WHITE);
; \& `+ h& f2 y" B! h. V - g.fillRect(0, 0, 400, 400);. e. |' A$ p0 O s
- g.setColor(Color.RED);$ {3 Z- U5 @ w1 \) j. I, z
- g.setFont(font0);
_$ E" Y, C4 G3 F4 J4 B - let str = "晴纱是男娘"; i+ ?* { Z+ i% I0 b9 V6 G7 K% V$ J
- let ww = 400;2 X: Z4 B6 m0 e1 P! d$ h
- let w = getW(str, font0);
' H3 ~% ^9 U+ h$ c! c+ j - g.drawString(str, ww / 2 - w / 2, 200);
( t! y1 n+ ^; x5 d - }
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- const mat = new Matrices();8 o( T3 O" E; ^5 R9 ?: o8 I8 e
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
) n* y8 a/ m7 l$ f. E$ J - let info = {
/ d4 F0 l D1 e1 v: \ - ctx: ctx,/ } H7 ?& F4 B4 g) U
- isTrain: false,
$ A! C" B- V" P9 K - matrices: [mat],. a1 N( U! ^+ S: B8 C+ S3 N
- texture: [400, 400],* S( n9 U2 ~3 f* B! J2 L! ~! i+ {
- model: {
% x. d8 ~6 `8 F; V% k' T- x' t1 ^ - renderType: "light",# o9 D( R6 d q4 z6 Z7 n6 M
- size: [1, 1],6 V( U$ B( i* O9 y' s+ E5 [
- uvSize: [1, 1]
' m0 ?0 e! n" J& Y7 C - }8 o8 l, z, ?! T- E" x3 P& f
- }
4 u0 Q, O; f9 | - let f = new Face(info);8 ~! Y' D+ D u
- state.f = f;
7 M& K9 Z* C: s6 y
: t# t9 i R& y- let t = f.texture;
1 q6 c+ a3 [! A" i0 u - let g = t.graphics;; y! [ Y/ X# [, u( {
- state.running = true;% r, g" L7 v L) B# ]' I
- let fps = 24;
/ H3 V/ z7 D1 u$ g+ U! W* a+ U+ ] - da(g);//绘制底图
- @4 m, C0 v$ V8 ]( E1 p0 Q - t.upload();: ]" k. I: H9 ?0 I: w
- let k = 0;
. L0 |8 e, r" h2 x/ `3 ` - let ti = Date.now();
) d9 p+ `! l& `3 K& R* P - let rt = 0;: h- K# l$ p" l6 d
- smooth = (k, v) => {// 平滑变化5 O& E: Z5 h; Q
- if (v > k) return k;
* ^8 u' B3 H4 L9 C& S - if (k < 0) return 0;9 w1 m7 `( S" `3 y; Z6 U
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
/ s) E5 e% ^ ?4 s2 {) M# b* I - }
: n0 d2 g3 f8 i- U - run = () => {// 新线程
9 v# ]+ N4 D) @( g+ w: o9 |9 V. Q - let id = Thread.currentThread().getId();
" M- A( J3 O2 N4 f( ^0 k7 T - print("Thread start:" + id);7 a! ?1 y4 `& _$ w' N _7 |0 a1 [- V
- while (state.running) {4 E. e- Z0 c( v& T8 n2 y
- try {5 |* x; F, I4 |6 }/ V( m$ F/ W z
- k += (Date.now() - ti) / 1000 * 0.2;
5 @' s7 |* T4 {* _! B - ti = Date.now();8 T; y7 o- M( ] V4 {
- if (k > 1.5) {
/ z4 {9 D8 N: n( _0 _) t7 R - k = 0;
" T3 S0 k" d& C) U ~+ ]3 j - }
8 I. Z% s! R$ W8 B4 F( s; o - setComp(g, 1);8 t- z* {7 ~2 y, n t& {0 E; M
- da(g);3 `# }( |( Q( i. F8 q
- let kk = smooth(1, k);//平滑切换透明度
, K6 {4 L+ q6 Y - setComp(g, kk);1 Z- [' _7 ^% W; @& K; a
- db(g);3 ]0 H. A4 p L0 ^0 F
- t.upload();: b8 u z( K2 o' O+ Y1 n
- ctx.setDebugInfo("rt" ,Date.now() - ti);
2 \$ l. n( ~% [* n; B# c( Z - ctx.setDebugInfo("k", k);
r( L$ h8 U `. u% D - ctx.setDebugInfo("sm", kk);
$ \+ E& Z' ]+ i' X* \: @$ ^5 P m - rt = Date.now() - ti;; m s& R% }" B3 T: \
- Thread.sleep(ck(rt - 1000 / fps));
# ]& [' b0 R% f- y# x7 A/ L - ctx.setDebugInfo("error", 0)
4 Y! i W3 l' R, H1 e - } catch (e) {
1 D+ }. p% f+ a: P+ L* \$ x9 j - ctx.setDebugInfo("error", e);
2 `+ p8 N4 q6 L: } - }8 Z5 J/ {* E/ n% W0 L% C: Z" {
- }
+ h4 s2 |/ i8 G# K. V" f - print("Thread end:" + id);
}8 P, S2 R, m9 ?7 P3 J9 ? - }" ^% F, P' L: Y, g6 q. P$ [0 h
- let th = new Thread(run, "qiehuan");) Y1 R! |9 A- n, n) r' D+ N# l% w
- th.start();
F6 a5 d5 g* L - }: L- |2 B7 c+ L$ A$ Y& K8 _5 O
6 p3 U' F3 B+ C+ N0 D, ~. W* N- function render(ctx, state, entity) {# c s) D" s L5 O2 I. J
- state.f.tick();
& C3 r/ Y& B. B4 T g - }
: l1 J+ H3 r( F( ~ - M# N# o7 W+ O/ ^% p
- function dispose(ctx, state, entity) {& F* p) Z& C2 \ Z& C$ w5 _$ c0 K
- print("Dispose");6 g1 a, U! N! Y
- state.running = false;
, X- W0 |0 J) N( j& Z' J# `( z - state.f.close();) A8 G5 t3 |2 a; `$ w7 E6 {( E# ?
- }
* g0 n/ T7 Y; I* ]7 N2 b+ b6 v - ' l: i) r# O8 z: D1 q9 }
- function setComp(g, value) {
0 Z7 j. Q- F6 z - g.setComposite(AlphaComposite.SrcOver.derive(value));& W. D. Q& l- A: L- v7 s W. F
- }
复制代码 0 J. x; x, J# O1 o; F( u$ N
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。4 u, j5 T# A0 [' D) S
8 }! q3 L& n6 I9 O+ x$ B9 W8 n) d# I- c9 v# m/ Z. W
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)! A; f7 T$ c0 M' J: V/ |
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