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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。
" z6 ?2 Q- ?7 D4 [0 S0 [- importPackage (java.lang);6 c% f$ r. ^9 N
- importPackage (java.awt);
' `7 m. k) X _) d) b
( x" C/ E4 p( s2 z4 B- include(Resources.id("mtrsteamloco:library/code/face.js"));1 Y& v5 I' Q" b' b9 z
0 T# v( ]4 M# i+ E- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);; A) \. w5 B+ A8 t; {8 p
, l* }: g1 _- _* h- function getW(str, font) {
6 v, }6 x! L" d6 Y6 B - let frc = Resources.getFontRenderContext();
& d' N2 C0 {3 X4 y9 R( ] - bounds = font.getStringBounds(str, frc);
, O& J" k# b5 H1 m - return Math.ceil(bounds.getWidth());0 l& C, r4 M; o7 ^; [
- }$ u. d9 P. |; F; F
- 7 r1 R; u: J. ]
- da = (g) => {//底图绘制
" R0 U- G' g. P3 N& u h8 l* t' W2 Y - g.setColor(Color.BLACK);
) ?+ L/ T. C0 D% N8 A6 z; V - g.fillRect(0, 0, 400, 400);3 Q: {) S* a- m% |6 S% J
- }
3 A ^' ~0 d) m* C7 t4 {& k- w - * ^ ?0 g _6 Q1 t) p8 o! a4 F
- db = (g) => {//上层绘制; n4 ^2 D4 q! `5 G x7 p
- g.setColor(Color.WHITE);
1 i/ j: s- D, V. H - g.fillRect(0, 0, 400, 400);
v9 Q9 E2 } e8 I/ `( K) t - g.setColor(Color.RED);
7 m1 l* n5 m5 e N4 H - g.setFont(font0);! q7 Z, p W% v) \1 T4 L1 g
- let str = "晴纱是男娘";
) I; u! M7 A) x - let ww = 400;
# B. E6 C' B9 n2 e - let w = getW(str, font0);
/ s2 q, l$ J$ v* m5 u$ s L - g.drawString(str, ww / 2 - w / 2, 200);/ y' o ]1 U! F+ ^& Q, F
- }, i. M1 B) U' t
- , k# X- D2 l x3 x
- const mat = new Matrices();
1 \$ Z: v6 ~& C; G8 U) W& J - mat.translate(0, 0.5, 0);
9 w: y/ z A7 y3 V, W- M% x; N. L; p
! e" B+ N" l5 |( M5 t- function create(ctx, state, entity) {
( s$ H0 i! S3 n5 ?9 y; G( X - let info = {
( D0 _* B, _5 A5 T* H) g - ctx: ctx,( V& k0 s3 Q; k- q- U% v0 \8 ~( F
- isTrain: false,
1 f' a" {% O7 Z' J7 U4 k - matrices: [mat],6 t- ? e- O* ?4 a
- texture: [400, 400],( V+ `! T0 B; Z3 q- _- d- a, Z' z1 z
- model: {$ K/ Z) _. C1 @/ e: m; f6 B( A m
- renderType: "light",5 s7 |: ~: m0 B& H
- size: [1, 1],4 V- h9 |( ]) }4 z
- uvSize: [1, 1]4 k3 Y5 Z% \. z: b. q& C
- }7 e" q' o; o7 n* {2 u+ Z
- }5 N& _ R, E$ ?
- let f = new Face(info);6 d1 L2 @: v: T# x7 |+ `
- state.f = f;& U( f: k. u- V B% W; d* I7 A7 h u
, {0 F) g# [$ |/ v d2 @- let t = f.texture;6 R2 y3 ~# ]5 q2 H# I$ K
- let g = t.graphics;1 l D h' W! }) z/ H
- state.running = true;
, C8 Y# B* R- Y- Q5 n* B+ Q. X# g5 b - let fps = 24;
7 y* z8 l2 h- v) I) B - da(g);//绘制底图
/ N1 A1 _, x$ x8 l - t.upload();. m+ M5 C& m) T m$ ^2 ^* d6 S- y% f
- let k = 0;
0 x8 a1 V6 `* p( L - let ti = Date.now();
& E0 F# V7 z1 ~ - let rt = 0;7 X) T2 w# W) l$ e1 u
- smooth = (k, v) => {// 平滑变化
, Z! M9 a/ L+ W( S( X- Y7 P i9 f - if (v > k) return k;* K8 b) d3 F( U
- if (k < 0) return 0;
- P; n- M& V1 r* L% R. J$ c; F - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
5 m3 L$ e! C7 F - }
% ?) A( C8 `: b - run = () => {// 新线程$ `' X6 M- r! ~$ S" s' t1 I
- let id = Thread.currentThread().getId();
( p0 _( X* o& l! Y4 @ U" G) r6 T - print("Thread start:" + id);
$ L+ T/ j2 W( t4 {5 C# K: `8 y - while (state.running) {; n- D% r1 F/ V3 @. e2 X
- try {
3 G, l2 J) o" H- e - k += (Date.now() - ti) / 1000 * 0.2;- o# F; T; G" Z# b! h$ E
- ti = Date.now();
3 h% ]0 S, B( X9 p: M. Q - if (k > 1.5) {# Y% J& N1 [& J: Y
- k = 0;: _2 {; r3 b w+ x( g
- }
9 H2 E& K F' @- D5 N7 [ - setComp(g, 1);' X5 a6 A3 I6 x& S. ?4 F- V9 Y
- da(g);
/ ]8 D3 P0 X+ o! U' x - let kk = smooth(1, k);//平滑切换透明度
( n- n( {& M4 S- C% i) g, ~ - setComp(g, kk);
6 N/ ]9 w5 @( V - db(g);" y7 {. @; l8 p. k' @
- t.upload();; o$ h6 {8 e4 O8 W1 I0 B
- ctx.setDebugInfo("rt" ,Date.now() - ti);2 ^+ M) F* C2 c" _' u" v7 @
- ctx.setDebugInfo("k", k);
2 A4 B; j* I' \( V4 E ] - ctx.setDebugInfo("sm", kk);/ @! G; C: h, c& S! |
- rt = Date.now() - ti;
( N$ s/ d/ j: s' ]( b$ Z" ^ - Thread.sleep(ck(rt - 1000 / fps));
0 {# J4 M) t1 F8 j+ q# a! a# Z$ | - ctx.setDebugInfo("error", 0)5 i/ e, S% ~" K. h; t9 {
- } catch (e) {3 i1 ^- d0 `; u" N
- ctx.setDebugInfo("error", e);
* v6 e. i7 ~; \3 l - }! h! U) x0 Q; c! N4 {) I: u
- }+ y) f5 P/ C: c& x- b2 f5 ~5 A
- print("Thread end:" + id);. X+ ^4 p4 S9 `, ^2 i7 f7 f
- }) W% {: [1 p. U# u3 X* b
- let th = new Thread(run, "qiehuan");$ ~, t) D$ y: g
- th.start();0 F' o0 }0 m0 T' o) @, p
- }$ f: B! ^: j0 A6 F# A2 s3 Z1 X
- 9 s1 P/ j, ]4 }: u
- function render(ctx, state, entity) {
# {2 @% O2 J* U `, L1 a$ m+ h - state.f.tick();. B( T+ c+ K5 ?9 \4 o
- }' c3 O2 v- j0 B% l* }* M
- 0 I) B% ?9 d* o3 i! r W* n
- function dispose(ctx, state, entity) {$ X8 x8 f# _' B% A* z. D) X
- print("Dispose");
6 X$ I1 _" P* ]9 ~0 {' ]; C - state.running = false;4 r+ m8 m% y5 F! i+ u x5 o
- state.f.close();
, O# R/ ~2 G( }+ W5 ?& O' N - }
7 N# b3 y1 V5 c }) d/ r2 y
$ `0 i% l$ s: p+ `: N' Y+ S- function setComp(g, value) {
0 V1 r& B* w! B; R3 ~! i: S - g.setComposite(AlphaComposite.SrcOver.derive(value));6 y3 S- B( d5 U( k% P) y" `
- }
复制代码
& V5 U3 t- w# m" F7 `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。/ @- c* O. F, w u: j2 `5 Y
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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)3 w( s2 K. D* l1 S
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