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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。
+ H# e( [# K5 T; S. L- importPackage (java.lang);
; L% Y6 P& D/ Z, J3 j; f5 ] - importPackage (java.awt);9 M0 C% K, h- k+ V) t& e
5 Z! `) o; {$ r! E- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);' m2 |' ?; {( c: f Q0 r
- 5 Z0 `2 h/ Z6 M
- function getW(str, font) {+ j6 z$ J1 F2 H: V# _( K
- let frc = Resources.getFontRenderContext();
8 Z4 A* Z; y* ]7 P - bounds = font.getStringBounds(str, frc); b9 }) W$ l' C) E w" D2 d
- return Math.ceil(bounds.getWidth());
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- 6 Z) R+ x8 u: x
- da = (g) => {//底图绘制# p# p' N4 H, ~# x
- g.setColor(Color.BLACK);# c# o2 B: F6 c) m$ Q1 x8 O
- g.fillRect(0, 0, 400, 400);
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- 7 m, h [; d4 @
- db = (g) => {//上层绘制9 z# F3 _# D5 Y$ h7 d2 }( x2 k9 K
- g.setColor(Color.WHITE);
+ h4 `1 A$ V+ H! ?: o/ y4 E) c - g.fillRect(0, 0, 400, 400);5 K+ I7 F4 E6 |
- g.setColor(Color.RED);
* {2 `9 G4 }, U0 @, B4 F- a - g.setFont(font0);6 k$ h# E \) m& U) I
- let str = "晴纱是男娘";7 J+ t) S0 W$ G3 r b
- let ww = 400;
, [( L* ]1 y% x5 s0 C - let w = getW(str, font0);$ h0 Q8 X7 e9 P g2 J6 E1 X
- g.drawString(str, ww / 2 - w / 2, 200);
5 @+ o7 u% _8 d# ^* O U - }
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$ Z; J5 v' c" k& N) s8 b3 h- const mat = new Matrices(); b3 E5 {4 m8 c+ `: ^
- mat.translate(0, 0.5, 0);
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$ x6 A$ U. k3 H0 O) D- function create(ctx, state, entity) {
! L' n5 e b/ Q7 ? - let info = {
$ m( h/ R8 M+ P# L l( t5 s7 \/ E - ctx: ctx,
2 ^, l s3 i# y - isTrain: false,
1 E+ r1 Y8 b9 M9 r9 j - matrices: [mat],7 r9 q3 B* W2 x
- texture: [400, 400],4 ]3 i; i3 O3 X5 P: l% D }8 c
- model: {
1 }. C4 T3 Z* H- ]4 Z - renderType: "light",: L/ }& E9 e% A+ _& B
- size: [1, 1],
8 D( P4 `5 p& J8 W0 T9 ?! H - uvSize: [1, 1]! a9 N% ^, b+ b0 t7 p
- }3 k* i7 x* _& o" \0 B* f- X
- }' w- t1 s9 [# }3 l
- let f = new Face(info);( ^! |+ f5 J8 h" {6 y6 u
- state.f = f;
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) ?5 k' L p4 h* M: g7 `) E- let t = f.texture;
$ g' z( H6 f( R* m& U( |. b: U& k& e - let g = t.graphics;7 K" {" c c# i5 G6 E8 Z
- state.running = true;
0 E9 k8 o! B- u1 C" f/ F - let fps = 24;
% T4 H3 Y& u& O# H1 f) Q! Z8 T q, ^ - da(g);//绘制底图
( i( t; d3 D. f4 W6 J5 S" Y/ Z - t.upload();+ h& U! q% M; N W/ z$ i" V/ G( g" b
- let k = 0;
6 H3 E5 h) s0 m2 V/ V- G - let ti = Date.now();
. p5 K9 @1 y- F3 Y, T( @ - let rt = 0;
! I3 i% Z1 s" G# c' p - smooth = (k, v) => {// 平滑变化 ~- w8 Q/ N5 D9 B
- if (v > k) return k;
0 F, ~- B4 Q2 w. b - if (k < 0) return 0;
3 M; m/ k3 U0 m3 W! B$ q - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;! M, J' y' U$ x
- }* ^. Z& S8 U8 V d
- run = () => {// 新线程' ` k5 D5 `8 ?) ]: Z- h+ T. @& A& d- z
- let id = Thread.currentThread().getId();& W% w6 x$ [2 }: k4 o! q4 Q5 W* g
- print("Thread start:" + id);6 ]5 j. C' H# N; _2 P. c9 j4 a
- while (state.running) {9 b+ {* {4 T: f2 ]0 s2 P, T, p3 j+ y
- try {
; d% i6 I! _( {' ]+ x7 W. U - k += (Date.now() - ti) / 1000 * 0.2;0 U" s: Q5 W5 v# i( e$ B
- ti = Date.now();5 }( H8 h% v7 J. C9 R
- if (k > 1.5) { j2 I" m8 q- z3 h
- k = 0;
+ ? r# w$ P% V$ s% O - }
" `& }/ G2 L: j- A% y A: Z$ H - setComp(g, 1);
3 }4 ]4 k. T6 R8 a, @1 d: O) e - da(g); j8 p& j; v+ s; `
- let kk = smooth(1, k);//平滑切换透明度, c. c. s, }4 o. Y1 Y
- setComp(g, kk);
& P7 l* Q7 H, ] - db(g);! D$ M; j9 y& n" e5 N! ]# p
- t.upload();
. g) G" q0 U% E2 N, v) `5 l% R1 ` - ctx.setDebugInfo("rt" ,Date.now() - ti);5 q& f! _4 J3 T! A; y% f
- ctx.setDebugInfo("k", k);' n. Z# s) L! N8 o) R3 E# }) E" p
- ctx.setDebugInfo("sm", kk);- z' R# ~' s, V, S
- rt = Date.now() - ti; M8 N/ c. t$ `0 R t9 l
- Thread.sleep(ck(rt - 1000 / fps));/ b% {& c! _8 {; l
- ctx.setDebugInfo("error", 0)$ f( d5 [- W' H
- } catch (e) {
/ D4 [! ~4 ?. ?# Q - ctx.setDebugInfo("error", e);& h! t; b: a8 F. p+ p/ e: J5 h
- }
1 |2 o$ T' z# s/ Y+ J. x4 q - }
0 W# i5 `, ` d) a4 ~ - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");( w5 R/ f* s+ _# H# F
- th.start();, x; {" u, m3 q' k
- }
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- function render(ctx, state, entity) {* m; z6 B, J' o$ w7 x
- state.f.tick();3 [+ F/ w& h3 [8 ^2 Z5 O+ o/ {
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- function dispose(ctx, state, entity) {
. o0 l& d* n" W! C9 K9 Z/ o# M X - print("Dispose");
9 ^; }6 Z, G' p1 ? - state.running = false;
3 | h" K$ B3 G1 d" @ - state.f.close();; O+ K% g; N* d5 f
- }9 }- I) I5 d( V+ K
- - O0 w, b6 t" u" v2 f4 X1 O* q
- function setComp(g, value) {+ s$ u( m; r$ _8 i M
- g.setComposite(AlphaComposite.SrcOver.derive(value));) H3 j6 O5 [1 |4 U# U R1 o
- }
复制代码 - r: f1 J/ K6 X \
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。3 y; n+ H* R3 ?
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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)! D1 b- n5 o3 f, k2 x
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