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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。
$ @7 D$ a |+ w2 c- importPackage (java.lang);
6 w2 G. k- G! O" E `: b - importPackage (java.awt);
% m6 x! e f( R
+ H/ i% d% _' K7 p- include(Resources.id("mtrsteamloco:library/code/face.js"));3 Z' w) i. T8 `5 H. j) z: H
- 3 s# X, G( B5 x& g1 `3 Z
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
* ^$ c; g8 F2 a: I
3 K4 `5 H8 K3 @0 D) Z, S C- function getW(str, font) {
, L2 c+ ~& H( N6 j& Q& V - let frc = Resources.getFontRenderContext();
3 X: `2 o' f6 e4 I - bounds = font.getStringBounds(str, frc);3 c& i6 z! i6 [0 M; [$ g' B/ D h6 W, C
- return Math.ceil(bounds.getWidth());
- T9 u4 N0 j. H1 v0 y - }
' E: ]% h& n+ m2 U4 b - 6 v4 U; D0 Q% U: D4 s, w, Y
- da = (g) => {//底图绘制3 Z* t [" \8 e0 y
- g.setColor(Color.BLACK);5 z% o* ~ x- H2 I& M; W/ ^9 q
- g.fillRect(0, 0, 400, 400);+ t& Z& z, v, z4 f
- }7 @' A) I W/ a9 u9 H3 D
! A8 Z. ^. a$ k- db = (g) => {//上层绘制' _0 x! n" H' F/ h
- g.setColor(Color.WHITE);* w* [1 D6 n+ I) Q' l0 N
- g.fillRect(0, 0, 400, 400);1 A# b0 u/ I8 z" k: @# u
- g.setColor(Color.RED);
+ |4 q; ]( O3 ^8 b1 h - g.setFont(font0);
0 Q/ m6 n$ D% }' a5 A; ~! M# B - let str = "晴纱是男娘";. c- [( V& e3 V/ X& ?8 m- j
- let ww = 400;" O, u4 v/ d" ~5 S. x4 z1 u
- let w = getW(str, font0);
! C7 z+ D) s( m6 f- R - g.drawString(str, ww / 2 - w / 2, 200); ^6 x2 A0 f6 m0 [8 e# [/ W+ Y& K& a
- }
) n @+ V0 u- k. b6 @/ x
( W1 D5 @& P( S5 \: }6 i- const mat = new Matrices();! c5 [$ U; H- Z
- mat.translate(0, 0.5, 0);
L/ f2 {( _) T1 L8 A - + Q# ]$ Q ^, N) K. l- p/ f4 a
- function create(ctx, state, entity) {% w' L# E# c' v8 V& E1 _/ O
- let info = {
9 z9 P" C: _ a8 @% T% W- `& o" u - ctx: ctx,
. S" B" \$ g. J* d - isTrain: false,
P2 L3 x: k9 l - matrices: [mat],
5 ~. {4 c/ n- V- s. \. `$ l ~ - texture: [400, 400],& r0 ]2 O( k1 U1 _2 D; z
- model: {( e: c+ _5 ?6 f( t
- renderType: "light",7 Q5 {! ]5 C$ V8 x @8 g, U
- size: [1, 1],
, T6 j4 x' y' y - uvSize: [1, 1]* W7 z# {" X+ P: E
- }
) o7 w3 x- G- Z, ]4 g! E - }
3 u: v3 B: F: x+ V6 A - let f = new Face(info);
/ |4 u! h: N/ q# T9 f/ Q! F, I2 z& | - state.f = f;) T, z* E. n3 [
. ?9 E/ ]/ m- g6 D- let t = f.texture;9 w$ }) q. E3 ^" w5 V5 D# S G
- let g = t.graphics;
6 O( ~2 B( X' e! c s - state.running = true;* U' H3 R& m% N; [' |7 ^
- let fps = 24;) q) I: E9 W1 Q2 t7 G
- da(g);//绘制底图; F! w( Q5 c8 M( ?4 ^' z6 B: X
- t.upload();
3 L9 k7 G( o+ [! l - let k = 0;8 Q+ U. t+ t/ W3 |) v
- let ti = Date.now();
9 W; K; ^* \# @7 s - let rt = 0;4 h/ w2 _2 u2 `& r
- smooth = (k, v) => {// 平滑变化
5 r! [1 d" a) _+ _ - if (v > k) return k;2 ~0 r3 @$ c- ~+ m5 o/ Y4 W
- if (k < 0) return 0;3 t7 S/ X5 q/ @
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
( B0 @, Z; Q" Q - }) [% R6 T+ X' A0 S* i) |, w" O
- run = () => {// 新线程
. L9 ?: N( \8 a/ L5 u - let id = Thread.currentThread().getId();
$ Z$ y' L. _) K. ~; f1 ^4 H5 { - print("Thread start:" + id);
# w' u$ y6 r1 j% U0 B2 m - while (state.running) {+ d4 o q9 \8 I* U8 a' V) J
- try {
, T6 e$ R# X9 s - k += (Date.now() - ti) / 1000 * 0.2; j8 E( N4 U, T3 c& x
- ti = Date.now();
7 i* D& Y! v2 t* x, _ - if (k > 1.5) {2 Y) j/ @) n; T6 P& r% r/ L/ Y
- k = 0;
3 r* _/ P6 q1 ` - }
8 o5 ?/ {! {* ` - setComp(g, 1);5 c# r1 z$ @( a. q
- da(g);
3 |; a) Z$ g' r6 B: y - let kk = smooth(1, k);//平滑切换透明度
! b6 i8 Z4 s9 e9 e. u - setComp(g, kk);
0 W7 X1 d4 J/ N7 p" O - db(g);( B* C; p# V3 Y, Z% U* e
- t.upload();
5 X' W/ n) f. y; c5 G0 ? - ctx.setDebugInfo("rt" ,Date.now() - ti);# K% ?. ]. O- V$ v9 T0 z+ o
- ctx.setDebugInfo("k", k);
# [8 d o0 P3 m6 i! {3 b - ctx.setDebugInfo("sm", kk);: E4 w9 P3 J0 M, y) @9 i. P! @
- rt = Date.now() - ti;
( [( \- G6 Q- r: x6 i9 U$ P - Thread.sleep(ck(rt - 1000 / fps));
/ j6 J( q4 [5 o* r8 o* a4 y; j - ctx.setDebugInfo("error", 0)! g+ ]1 a" G6 R- r- H" }0 h
- } catch (e) {
9 E$ w) @) L6 J1 e( y" Y2 y( \ - ctx.setDebugInfo("error", e);1 G# L$ i9 s" v. A
- }
/ N$ n1 t: l& K- h+ ~, G- b1 [ - }: z3 `) _2 z- n7 i# x: }
- print("Thread end:" + id);8 u* t7 {8 o% L: F: Y
- }: O8 H' N6 E0 }/ S5 X* Y( {( l# i
- let th = new Thread(run, "qiehuan");3 l, |; v _5 I \/ r
- th.start();* G4 |3 Z: P E. S2 M
- }
! {0 L( `: M4 N - ; \+ |3 }* G* @2 \; Y: ]. I: T
- function render(ctx, state, entity) {
0 A! M- a, }% t# |$ j& u - state.f.tick();
3 _0 Y4 ]4 T0 z: M4 G- E - }2 b. @1 e3 e6 F6 }
- ' }& n! J5 F/ ~( S$ ]0 D% \
- function dispose(ctx, state, entity) {
0 ~2 h% O0 G# o3 V. m; ^ - print("Dispose");
8 a/ ]' ^- O4 B4 d0 J! u$ i" _ I z9 n! ` - state.running = false;
& J- N6 T; |1 N - state.f.close();
4 n* Q1 v5 s; C% w1 i E" Z* | - }
1 {( s9 O4 J4 _; T - % S) t$ S( t: I+ J
- function setComp(g, value) {+ a6 c4 Q% b; i0 V7 g
- g.setComposite(AlphaComposite.SrcOver.derive(value));
4 v/ {! s2 g$ ]8 D: W - }
复制代码
* h0 r: a6 H: o4 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。1 d" ]1 A/ u% }. |% g# s3 P Z
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# O" k2 U0 ` {* y4 m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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