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& V4 U# v5 Z# L& y9 V4 Z; l9 z" 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。
^( x- B8 K1 F% |# E- importPackage (java.lang);
( Q1 f+ T" t4 O; M+ {7 f - importPackage (java.awt);0 a, }) [7 ~1 y% a2 I* c
- H% k: h! m0 K B
- include(Resources.id("mtrsteamloco:library/code/face.js"));
+ V% w3 Z' J( j8 e: l/ } - 4 o* l y. u% j2 D1 U# {
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);2 v6 r" D0 `8 |9 T6 ?
1 N' ~/ Z" w d- function getW(str, font) {
- K- A, r; k7 F# |4 E' Z - let frc = Resources.getFontRenderContext();: [. Z% L3 x0 Z8 i2 f6 m" O
- bounds = font.getStringBounds(str, frc);* ?6 Q" t& m0 q
- return Math.ceil(bounds.getWidth());2 T. v! V! q4 H( O
- }
$ ]) z9 H# D0 j' o2 Y% i9 v - ! F% j+ k* O: S$ X$ U
- da = (g) => {//底图绘制: m! V# E, p) N
- g.setColor(Color.BLACK);5 k- Z3 g( G- N
- g.fillRect(0, 0, 400, 400);! {( r- ^! @9 e; s4 {
- }" ?# s8 m. ]( R: I9 f! B9 ]9 l
- $ G1 m3 z7 F0 ^! B7 P$ H0 F
- db = (g) => {//上层绘制: @! n! e; a# z+ y4 K- A1 e
- g.setColor(Color.WHITE);
( g- g+ w3 g5 d - g.fillRect(0, 0, 400, 400);5 E" u4 s w2 u
- g.setColor(Color.RED);
+ k/ D3 P4 ]0 n- l - g.setFont(font0);1 B5 N6 _5 Q) v" x7 ^
- let str = "晴纱是男娘";
- {: I6 j) Y9 t& [ - let ww = 400;
$ [2 B# p7 k, t7 ?; ]8 T - let w = getW(str, font0);2 j: u8 E4 \! D" L7 k- N& u8 U
- g.drawString(str, ww / 2 - w / 2, 200);
: \, v/ A* m) ^9 O# v7 J5 h! v - }, j+ e0 a7 \9 x" k3 p) w1 _
- 5 Y) u5 M! o* _6 ^" @' @ M
- const mat = new Matrices();1 Q1 J9 |/ c7 @) U8 @( d$ S; \9 i- J. M
- mat.translate(0, 0.5, 0);' e8 ^7 @, ~# J
- $ d+ d0 O6 A' q( }0 ~
- function create(ctx, state, entity) {
, X7 K$ [& F4 b% T - let info = {- h' d5 ^) b6 Q7 I% {- U
- ctx: ctx,' W9 h- O K# `5 C3 i3 h/ W) B l
- isTrain: false,
9 M* k. I/ j( k9 P5 Q - matrices: [mat],; A) S+ u- a E3 y. u+ t, D1 J4 }
- texture: [400, 400],1 u4 p3 d8 ^0 I1 ?
- model: {
- Z# z P" P8 v3 a2 H* V - renderType: "light",0 v) B* r3 R! k( Y8 T' P1 k
- size: [1, 1],
& ]: S7 v8 s6 x$ c0 f - uvSize: [1, 1]
( \+ _( R+ W: g8 F+ z$ E0 G( {+ s - }1 V. G. P- j3 H( u( Z, F
- }9 t9 V2 L( F1 }* l* Y
- let f = new Face(info);
+ f. p9 V! o g1 ?- p& R9 [; r4 f - state.f = f;9 `1 a0 B5 }' c
- 1 z' u0 o. d; ~7 `
- let t = f.texture;
. u, s, H" E. m9 m' }3 w - let g = t.graphics;
& z9 V+ \& [- G - state.running = true;2 W+ }0 ^! r$ W, k' P; K
- let fps = 24;
, Z2 o: M7 m6 `" n - da(g);//绘制底图
% X/ ]6 _9 }" |* V - t.upload();+ a& H( \* u% d. K
- let k = 0;
/ V @' S. ?' O+ P: i4 M& b - let ti = Date.now();3 u7 G* K& J( @$ B, {
- let rt = 0;
' ]9 o- Z* @; F1 j1 I - smooth = (k, v) => {// 平滑变化
" Z6 z% ?/ r- }9 S - if (v > k) return k;
- t5 [9 ]; l( Q6 r, I$ ~, g) E - if (k < 0) return 0;
- ^4 q+ M9 G$ J j, k, V - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
2 h' E( N8 H3 a! a8 ~ f - }4 O3 ^4 } M. u) H% J: p
- run = () => {// 新线程
3 t* Q g7 U* j$ ?1 W, T - let id = Thread.currentThread().getId(); `6 |4 D- P6 n( z g
- print("Thread start:" + id);2 Z* X9 \) U: X% ?2 ]# J
- while (state.running) {
" o" @* Q1 z8 ]0 O - try {
0 t4 b& G. D( t8 K2 ~9 U - k += (Date.now() - ti) / 1000 * 0.2;8 ?4 T! [+ d% a0 U L# C
- ti = Date.now();, O5 B* _ {( ^: F1 {1 g
- if (k > 1.5) {
, j" H! h" ?8 I6 _2 c - k = 0;1 k5 W, }) u# g
- }: D+ X* b7 |9 j. E$ N- F
- setComp(g, 1);
2 t- W: B7 `& _- k( W* U - da(g);! k+ X A. ?0 f2 i4 q
- let kk = smooth(1, k);//平滑切换透明度
9 G5 R+ X/ e+ e9 [ m( U9 H, x - setComp(g, kk);
! s$ d6 O- G) H2 R" `/ q - db(g);1 z" B/ g/ O% A- y4 g; M) e
- t.upload();; W5 E: w8 S# J) V
- ctx.setDebugInfo("rt" ,Date.now() - ti);) W6 R9 E2 L7 o7 e9 m: |) I% b- L
- ctx.setDebugInfo("k", k);+ e6 T+ m) T+ z( [: S6 u
- ctx.setDebugInfo("sm", kk);
/ k( x1 v: o+ [5 u" U - rt = Date.now() - ti;- e4 i4 a, |, g2 C0 ?% N" J& m
- Thread.sleep(ck(rt - 1000 / fps));
' J4 |6 R- w& b( v' E% h# Y' v& ^ - ctx.setDebugInfo("error", 0)
* z. p& }; I2 c5 I/ E - } catch (e) {
F' G7 g6 h3 A* _ - ctx.setDebugInfo("error", e);2 `- h0 n0 ]4 y9 P, V
- }
. f" z3 @9 d4 S6 R- H - }
' v+ V% t+ k# D. h - print("Thread end:" + id);( p- U b% M% F# ?8 a3 D# G
- }
! }; K& u* K ~4 m, X - let th = new Thread(run, "qiehuan");
; Q7 |5 I, o0 l - th.start();
+ i5 N/ L H; G - }- \& c9 k3 ?0 X
- ( T1 [" P) }: ?6 J( X- Y
- function render(ctx, state, entity) {& n7 s2 e/ b* b9 o* q) C+ I4 s" C; J
- state.f.tick();& M' G* J0 T: [
- }
1 H% d' T1 f L8 {" J
4 o1 U% D) b. s q l- function dispose(ctx, state, entity) {( V6 H% V1 \1 d+ w$ G B
- print("Dispose");- c/ o! E! m/ i$ b
- state.running = false;
P4 ]; H) U' |/ O( [ - state.f.close();5 N: @" g0 R+ p" F" v/ Y3 S
- }+ W Y$ |/ g0 |* ~0 Z% ?1 |
- ; {: e- c0 V7 x7 h7 g
- function setComp(g, value) {2 K$ F0 S( K% C5 a. H
- g.setComposite(AlphaComposite.SrcOver.derive(value));* S+ q* e3 C4 w* K- G( H
- }
复制代码
* z! R3 j" c! \( n. `& K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。; _: s# l; C! `0 ^0 ]
2 U, a, p6 O( c# O0 U K
* D7 m5 c! Z3 y6 U6 q! L4 Q3 j顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)1 X1 p; E5 T. ]3 W _
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