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j. A! W9 Y ]; U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。2 V( e( y' q% J/ F/ v
- importPackage (java.lang);
3 J5 i; O" Z$ i0 x7 K1 D/ v8 k - importPackage (java.awt);$ N7 o* ?0 y( a8 t- `: c6 U
- ' c! h8 r2 c: R) H4 {5 Q7 k
- include(Resources.id("mtrsteamloco:library/code/face.js"));( V$ \. H* {0 Q* ~
# g# a7 e* }# e. J- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
/ A, a: A" s* K8 D* j7 g6 q+ f
' l2 `5 x# e. A$ z6 A, O" W+ [- function getW(str, font) {
5 G0 A0 |. {( b2 ?" \* O - let frc = Resources.getFontRenderContext();( B0 l5 Z2 Q0 ~( y! f p
- bounds = font.getStringBounds(str, frc);
$ Q$ V# N- I0 {* _& W - return Math.ceil(bounds.getWidth());' x$ R% B7 A8 k9 _1 _4 V( @
- }6 s; ~) }' M! T1 W* q. F8 |; i5 ^3 g
& H- D) }! u& ?) F4 _$ p- da = (g) => {//底图绘制
/ j; j6 K7 t2 M$ {- r - g.setColor(Color.BLACK);3 W/ h: o5 Q% _1 A; g0 i* X& F
- g.fillRect(0, 0, 400, 400);
; d& ~, l5 C' X4 S; F, l a" {5 { - }0 ^- r2 ^; d: j' Y# x
* T8 d$ O, Y t$ @- db = (g) => {//上层绘制
/ j- ?4 |3 v$ q - g.setColor(Color.WHITE);
) u( r) P$ W# ]/ L3 U5 ^: ~# w' _! u - g.fillRect(0, 0, 400, 400);$ F1 E, l, X% A* E( S
- g.setColor(Color.RED);5 R5 O* W+ p& L
- g.setFont(font0);8 w0 ^ E- a8 z6 q6 w+ W' L" U! K
- let str = "晴纱是男娘";
/ x. U# ^2 |4 Y/ {& W+ [+ W; P - let ww = 400;
6 h) h4 V7 T& x0 v, M - let w = getW(str, font0);( S) t# }- n, z1 F( E/ ~
- g.drawString(str, ww / 2 - w / 2, 200);
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- 5 U& e' Q9 @* }/ N$ @0 Y. k
- const mat = new Matrices();
2 c: y/ d4 p3 q; v6 f - mat.translate(0, 0.5, 0);% A" h! N( F( |' Z2 U1 h
" o2 k! o1 D9 P8 F- function create(ctx, state, entity) {* @, ]4 `3 W( R+ K6 G9 p* |8 u
- let info = {0 \) l: n' o! e
- ctx: ctx,
# J: i: [- X5 F/ h( l* l- U) |. C - isTrain: false,
9 A i) s- P4 V q5 Y5 v" z - matrices: [mat],6 |! ]6 M( X$ L3 e J/ ]8 s- A
- texture: [400, 400],
7 H: Y2 B6 F1 b) M - model: {
5 W x2 y6 K: I2 K - renderType: "light",
3 l( t5 j5 H# T0 _: z2 s4 Y) U - size: [1, 1],
8 i" s& r! C) }$ C5 o - uvSize: [1, 1]. E+ _6 L) |& D. e! u
- }
/ W R2 T- w+ X' L1 w - }9 v5 U+ A) j) v% t
- let f = new Face(info);
4 v+ J8 a: h! _, P- ~' X - state.f = f;
7 v1 G0 M l4 a) g" x3 ^ \! x - 4 q! j2 r- G7 }9 s" v2 s: ]
- let t = f.texture;2 V* _7 i; R6 W" N0 i
- let g = t.graphics;4 a1 I2 |& e/ K6 y8 ~: p( [+ q$ J
- state.running = true;
1 Z6 ?; E& U4 [2 q - let fps = 24;
" n9 A' c. W0 q* H1 l N4 m5 D - da(g);//绘制底图! {- b5 K4 P$ `( Z+ z5 H
- t.upload();% T7 I& i b6 t7 S3 C
- let k = 0;
! |' T2 }4 r2 h+ ?7 p. j - let ti = Date.now();
6 L$ e0 y' b# Z9 }# S7 R - let rt = 0;" {6 \# |+ u8 [9 J8 @/ _3 g
- smooth = (k, v) => {// 平滑变化: o, v( ]' j) ]# E5 l/ Y; n
- if (v > k) return k;
4 t1 W# B9 r$ y - if (k < 0) return 0;
* I+ M* x6 @- o" _. N - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! v0 |9 D# i/ Y7 P7 [# R$ K - }
7 T# R/ y+ s3 x: y( K1 Y# D - run = () => {// 新线程
- _. m) A1 R9 x$ |- M2 A4 l- e - let id = Thread.currentThread().getId();
- g5 r' S, a" n - print("Thread start:" + id);0 d- q4 ]; e2 b* i( B$ @8 H
- while (state.running) {2 n6 l- }) c g: f1 |
- try {+ v: ~$ s5 a! {. E. W
- k += (Date.now() - ti) / 1000 * 0.2;9 N. d& k( E$ Z! C/ X
- ti = Date.now();* _8 ?3 P: E2 {% j6 m
- if (k > 1.5) {
, I0 n8 j% Q9 s2 U* Q% ^" |0 J' y1 k - k = 0;. O) n K# l, L" l
- }: K, k1 G: j {% `
- setComp(g, 1);& @) x& X4 A( J5 j+ _& y
- da(g);4 I, z1 r3 D6 e% [
- let kk = smooth(1, k);//平滑切换透明度
3 _3 s3 G$ c; z/ E5 Z# ? - setComp(g, kk);
8 U' Y0 ^; A- e l2 ~4 T+ ?0 Z - db(g);
9 t$ ]. p5 n2 a. g1 z - t.upload();
# h+ V- Q1 [% L6 c6 S# _0 P, ~ - ctx.setDebugInfo("rt" ,Date.now() - ti);
% f$ p0 i/ S: ?. n8 N4 ] - ctx.setDebugInfo("k", k);
1 {$ Y: L! E E1 M: e - ctx.setDebugInfo("sm", kk);
7 K) X# O! B, | \ - rt = Date.now() - ti;$ \! @+ s: e2 w
- Thread.sleep(ck(rt - 1000 / fps));
Z* p* n2 _& _6 Y' N - ctx.setDebugInfo("error", 0)
# Q2 o1 n& f, u - } catch (e) {+ m) c3 E% W3 e( p3 ^
- ctx.setDebugInfo("error", e);6 r! u- Q6 F4 W T5 X' e
- }+ d" v D% ]2 [/ {/ ?
- }4 u* l/ O: J# z# {, M8 G5 R+ o
- print("Thread end:" + id);7 \! k& s4 A9 q( J1 I+ h7 b, y
- }& o) P! x% P. I! M% i
- let th = new Thread(run, "qiehuan");
7 L& y' G4 }; [3 M1 c - th.start();
, C0 a$ G- ^9 i4 Y - }
! L: V, l8 r1 `2 S+ U - & o# ^% t& e6 |9 T b0 m. z# u
- function render(ctx, state, entity) {& f5 x) P" N% b8 A
- state.f.tick();
' Q( Y/ o" o4 ~6 ^+ q# } - }6 h; s/ l+ N7 k
- % W! [0 J# E& L e9 l( Q
- function dispose(ctx, state, entity) {
0 N' }2 \ A$ D6 {' }6 k8 S& z - print("Dispose");
; D9 \3 R2 I# b q - state.running = false;
3 v5 W% ]7 k3 c& l, H" q0 J - state.f.close();
2 w! I- M7 j- Z3 a6 e - }) U, a3 n" f5 ^# T5 e1 Q
- ) A, H" E- j3 Z. v) n
- function setComp(g, value) {
) i; u6 K5 U! H8 [ }1 T - g.setComposite(AlphaComposite.SrcOver.derive(value));
6 l* f# R% X" D- m2 ] - }
复制代码 * c+ }, m! L1 t
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。0 E$ a/ {# B/ u& O- p8 b( [' p
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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)9 C* s5 U' E$ V3 q" f" ~6 c
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