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+ V( L% A9 W; @, q7 n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。
9 v# B+ g: ~& P- importPackage (java.lang);$ h' F. N. [# T- o. j
- importPackage (java.awt);- @) R; C( e4 x4 {
" x# B1 n/ f/ b/ K! w% }2 c- include(Resources.id("mtrsteamloco:library/code/face.js"));) Q9 _$ c, A$ r* W
$ m _, U5 a! {( Q( z. W- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. w8 Z- `$ R) ]& ? Z
. A- a) P# K( Z# S8 P# I: I, v; a- function getW(str, font) {
3 o- [6 g$ m* J - let frc = Resources.getFontRenderContext();
1 @* G- J( j( @2 O" u - bounds = font.getStringBounds(str, frc);# F( Q2 e9 `/ I* p
- return Math.ceil(bounds.getWidth());4 C2 O/ V1 t+ g, R0 x* V, R
- }
, M2 A' P ]4 a) I* u# v - 1 p. ] w" n$ f# \2 r9 t) p2 J
- da = (g) => {//底图绘制
( F x g/ W7 m2 r1 P8 u9 E2 ^5 V - g.setColor(Color.BLACK);
5 S9 @. h/ B. T2 K& O) W - g.fillRect(0, 0, 400, 400);/ |5 e/ O- V3 C2 A: V
- }+ N: e$ ?2 u; R8 n8 [
) W5 N2 K* N9 j$ d/ e. {- db = (g) => {//上层绘制8 e- B: W/ l( i
- g.setColor(Color.WHITE);7 Y. |5 M, C- x# v% v5 V! s% C- [
- g.fillRect(0, 0, 400, 400);" x M7 a- x& r
- g.setColor(Color.RED);
- T# T$ s/ E' x9 t: {3 m - g.setFont(font0);; Z0 l( v/ |. f4 a
- let str = "晴纱是男娘";
6 I. a6 y; p1 e r1 Y - let ww = 400;
5 j- X) o. P( s |8 O3 b - let w = getW(str, font0);: U' w) m& X4 V& h
- g.drawString(str, ww / 2 - w / 2, 200);' m: C% c1 M- m1 O; ?5 n
- }$ }* N. u7 C' X
- 1 D. t r* ?& u
- const mat = new Matrices();
; h% ?+ Q4 f6 i+ G8 D - mat.translate(0, 0.5, 0);
/ e! g# e8 [; G3 g9 v
, L$ h9 s4 C/ h, I2 ?0 `1 \ v- function create(ctx, state, entity) {6 ~$ _3 I8 T6 ^ y9 }' t: o
- let info = {/ `* e5 q; J5 V: ] v' F+ o" M
- ctx: ctx,( [: l/ z: @' N$ M, w
- isTrain: false,
+ }' l4 j+ x3 ^# }1 q- S - matrices: [mat],
6 Q8 v# k7 H9 Y7 {4 I$ R) Y - texture: [400, 400],* B# k( c- X# R
- model: {
1 j e% x1 R6 T( j) t - renderType: "light",
: r" Y# o: E B7 z3 }- v - size: [1, 1],
7 M6 {8 e' G7 G+ v- y - uvSize: [1, 1]- @: Q9 e# c: Q/ Q* V2 G
- }
4 O- \: L# h$ } - }
$ w6 d$ d k1 Y3 f; i. h - let f = new Face(info);
! H& Q0 o: g/ D& E - state.f = f;
! T1 L% Z+ f: _1 j# }; `
% B W' C; [; [4 K/ @, }- let t = f.texture;
* T1 V b, }, s8 p- M1 |) }1 V - let g = t.graphics;
( ?2 h m4 A8 n9 p) E# ` - state.running = true;
5 `# A* y- x, l& ?+ {' V+ X - let fps = 24;: P4 M h: K' A ?' S" z
- da(g);//绘制底图. B9 ^% P s8 y) _( |
- t.upload();
0 V% l W, A5 d) C - let k = 0;3 O+ g! c6 n+ ^) N9 n$ V
- let ti = Date.now();
% u1 ^; }" h/ g6 [1 n/ }4 ]# X, | - let rt = 0;
+ F' k+ M$ U" ~5 U8 Z( w' w3 h - smooth = (k, v) => {// 平滑变化% F% I: {2 K2 L6 j, |% y3 K
- if (v > k) return k;5 T: P, _9 W4 g5 U& q
- if (k < 0) return 0;2 g/ _3 X) O' s5 X
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;' \4 K0 l. L- f9 q& y" T
- }
# Q" q, L8 U: J0 ? - run = () => {// 新线程
6 s7 n4 G# z. V8 R7 j1 r) | - let id = Thread.currentThread().getId();
$ k) n) b# x C) }, }" ~$ B - print("Thread start:" + id);- G& |4 [$ h0 I* g
- while (state.running) {/ U8 C- G+ ?) q" [, _9 Y
- try {
, j, i3 d' Z! c: c* I - k += (Date.now() - ti) / 1000 * 0.2;# K) x f( h6 e8 b
- ti = Date.now();- M4 X+ [" l5 C! [3 x4 D
- if (k > 1.5) {
+ b# @3 Y! G7 c+ Q& i; g5 Y - k = 0;2 p1 y+ g- H! P: S5 y. T
- }
$ @% D; t. t" V/ x7 z- g! [ - setComp(g, 1);( ?, _: g. F3 e7 L' A
- da(g);
* o' {$ r3 M7 M& T( k. V* l6 z7 p - let kk = smooth(1, k);//平滑切换透明度
7 l5 `3 B3 v' ~6 Z4 y8 y3 v; S - setComp(g, kk);
8 c8 U1 U( H) K! P) r - db(g);
5 `; ~: g2 U' m" X - t.upload();" E8 u8 S& D# f: }( e# A
- ctx.setDebugInfo("rt" ,Date.now() - ti);8 e6 k" c9 b$ l. e v
- ctx.setDebugInfo("k", k);4 [- f$ Q8 w# Q
- ctx.setDebugInfo("sm", kk);
5 R& ]6 k! s) H2 A+ T - rt = Date.now() - ti;5 S( P/ p* P; S& `* B
- Thread.sleep(ck(rt - 1000 / fps));- a- z8 C: N9 s0 j- \+ [
- ctx.setDebugInfo("error", 0)
( X0 I+ l7 ?( W& {' l - } catch (e) {% e1 g# e$ @. p- m6 W% W+ l7 {
- ctx.setDebugInfo("error", e);
! \# }& x4 s1 e - }2 j$ C& u/ N6 H% T- y- ?
- }8 P/ z( a7 E( ^
- print("Thread end:" + id);
- N3 j* W7 z3 O- H8 f z - }2 j9 ?: e" D8 c+ b# y
- let th = new Thread(run, "qiehuan");
! B6 P! I# F: w - th.start();, C/ R0 W7 U( l1 e
- }
( a" A# H7 m% d5 m# g! c, H - 5 E( Z) f% [5 h/ w
- function render(ctx, state, entity) {
& V& L( K/ H8 z/ I - state.f.tick();
/ n F( k) M) B- o: ?- D, L9 Z2 ^ - }
3 M( z/ s4 `# i7 C9 W
3 M- g+ O; Q! l9 B8 B- function dispose(ctx, state, entity) {
/ ^$ T6 b8 `: \6 A- m. f" R - print("Dispose");2 Y# ]( ]' w' J$ H- V2 r% q
- state.running = false;' h6 x. P, Q5 P) g7 Y' I8 B
- state.f.close();( h, B1 Q% Z- C8 E* i
- }6 o& W3 v, s6 L, D2 d
3 N0 _4 @' V$ t/ o' Q" t! S+ D- function setComp(g, value) {3 O' l9 S$ w6 \8 _ M; b
- g.setComposite(AlphaComposite.SrcOver.derive(value));
* k- g5 n! Q; q/ ~( Y% }# d$ | - }
复制代码 . m1 R2 x1 o, @1 M6 I2 [& M( g+ v
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。6 ~, z7 H9 ~8 q2 g
6 L* C. T1 v3 W. ]! `8 |7 _; C# t3 l$ f, M, U% i
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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