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3 C8 t8 t3 m' e3 S8 P1 ~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 q+ s; a8 @# b4 y& v/ A- importPackage (java.lang);, C/ {8 e! r# N: L f0 T9 b
- importPackage (java.awt);
- ~. P7 p. d! } o) D6 t! O6 o
( e6 B4 ~0 F2 Q- include(Resources.id("mtrsteamloco:library/code/face.js"));
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! m2 i: a8 n) F0 w8 J5 t8 g- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
. i% `" f- K6 ^2 E3 z
1 `, ^, a7 N& t/ X+ q- function getW(str, font) {
% P5 `- M0 E& o6 {2 i, G& P - let frc = Resources.getFontRenderContext();
; L4 t4 h- R. V. _9 f2 k - bounds = font.getStringBounds(str, frc);
. x' |5 e4 m8 C - return Math.ceil(bounds.getWidth());2 P0 v5 p) V1 ]
- }
1 [" x/ l+ h+ ], O$ b - . j* h" K& Y5 F3 t/ b3 P, ~
- da = (g) => {//底图绘制! y) l$ L; s* k
- g.setColor(Color.BLACK);
% n+ L' h" g2 C' g6 V/ R5 a - g.fillRect(0, 0, 400, 400);# A) e* x2 L9 G: z/ v
- }4 ]* ?6 a" q6 O8 I. P
- : r. h2 _) U# {" Y. Z( w
- db = (g) => {//上层绘制
4 \3 n X/ r( ]( K) |( Q% [ - g.setColor(Color.WHITE);
; T1 Z) Z# ?# O3 `7 C) U - g.fillRect(0, 0, 400, 400);
4 a7 J9 c; N& [3 z& t - g.setColor(Color.RED);2 o8 O1 E& P* Q( S% [6 Y
- g.setFont(font0);5 ]* ], }( q8 [6 f0 C
- let str = "晴纱是男娘";4 y y, V& j* F7 a, l! `: a2 D) Z
- let ww = 400;
r& h4 `" m2 ~" \- b0 J; e6 x - let w = getW(str, font0);
3 C p/ y# y* h8 _! q4 S - g.drawString(str, ww / 2 - w / 2, 200);9 |* ?" e3 w: Q- c d6 c
- }
2 ^4 L4 A2 W2 _ - 8 e2 u8 Q, m1 B& X7 J9 t2 d
- const mat = new Matrices();, f* y& {- ?. @# u7 d0 X
- mat.translate(0, 0.5, 0);0 H6 _+ k. s' W6 C, R
- % j% \) C+ V- i* N% B
- function create(ctx, state, entity) {0 m. B4 m6 K h0 k# I: x0 d
- let info = {
& Z! u# T# G7 X7 P - ctx: ctx,
( o4 F: {! o4 j, T - isTrain: false,
+ P' D5 N5 q' U( B$ d) K - matrices: [mat],( h. h0 p/ D) G5 f. }+ Y) L
- texture: [400, 400],$ s" c/ S7 u! ~" u2 B
- model: {- ?0 c' g" Q7 M. n' n' ?9 v# W
- renderType: "light",
7 E) \* Y+ R. I% [$ c! X5 H# V* o# T. I - size: [1, 1],
0 y# N3 [: `; W - uvSize: [1, 1]
& K& ]( a1 T; g+ K) o: K3 z - }$ r: k$ y6 e0 z) m
- }! U5 k' @$ K) ^; w" {1 L5 f1 l9 u
- let f = new Face(info);
6 q3 t% o* j' q4 a - state.f = f;; h5 h: [& Y0 q, i* _/ Y7 v
- ) V. T: N9 ? ?7 h
- let t = f.texture;
. F3 ]* t( E8 q3 R% y: L* P - let g = t.graphics;
% R$ n, y# \& s" g - state.running = true;( @" n1 ^$ a7 i( l3 [
- let fps = 24;
1 c1 c% ^" G. S2 ]( I1 W1 K - da(g);//绘制底图
3 A3 u+ l8 T+ r2 s, J7 V) I - t.upload();
4 E1 j' K- H2 M9 E - let k = 0;1 \7 X* N" s7 V/ ]- b; [
- let ti = Date.now();2 _+ h. q0 O" R* M6 N$ K& I/ Q0 H
- let rt = 0;
7 v' ]# p5 q5 D( k( m1 I3 I& a - smooth = (k, v) => {// 平滑变化/ _0 d4 ~- F. Y& {8 d
- if (v > k) return k;' |6 k& ~/ m% |
- if (k < 0) return 0;
. }1 C# v5 }2 i' ` - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 M: `- ], [/ P% d* F6 V" a' p+ W
- }* y6 V+ k5 }0 E8 t7 W1 N0 p6 R
- run = () => {// 新线程
* e: L$ l2 E" t) E+ M/ j - let id = Thread.currentThread().getId();2 P) X$ @" U2 y
- print("Thread start:" + id);
7 w3 W7 V8 C K" j" V: \$ `5 m - while (state.running) {
% o: F2 ~" q& a, {/ ` - try {% O e( Q7 |6 l9 W0 t
- k += (Date.now() - ti) / 1000 * 0.2;
$ w- y) t! X. i - ti = Date.now();6 f8 n9 |. X2 Y4 O1 ?
- if (k > 1.5) {+ o; r3 F3 L6 d k* f6 g! b
- k = 0;+ F% N& D! {4 ]% ~
- }$ h3 d; w1 c/ Y2 W: }" G$ D+ J$ K
- setComp(g, 1);) P; z# N( b; O; z, h* S) U
- da(g);; H1 |' b A" P' t; M. T) a* Z
- let kk = smooth(1, k);//平滑切换透明度
+ U3 g5 m3 P3 F) l/ G& a0 o) r+ | - setComp(g, kk);
$ x4 |" q( E# X3 w+ [' ]$ i% l0 c - db(g);
8 i- r" p# D$ m+ M - t.upload();5 o( W3 e0 Y T) W/ U* B- a2 n
- ctx.setDebugInfo("rt" ,Date.now() - ti);
7 G+ k( I5 {0 N8 l% l, \# \ - ctx.setDebugInfo("k", k);4 \9 {. \4 u- u5 _' q
- ctx.setDebugInfo("sm", kk);, B7 f$ Y/ t+ n* ^& I" L6 h8 H" z7 J
- rt = Date.now() - ti;! Z0 U4 @! n9 J7 Z
- Thread.sleep(ck(rt - 1000 / fps));
1 r7 L7 ?6 D* |9 Q6 z - ctx.setDebugInfo("error", 0)
- Z7 b1 l5 x6 a4 H @1 ?* P' w - } catch (e) {
% f) s. X9 l. d4 w+ [9 H - ctx.setDebugInfo("error", e);( i8 N$ R8 _% ~" }/ o% v6 a; L
- }
' c/ x4 w1 [5 _- _+ N3 @$ V - }2 ?) n/ r: z2 E6 Y1 d
- print("Thread end:" + id);
9 P& X! U- V; A1 i - }
e& ?+ V5 R' E" c' ~ - let th = new Thread(run, "qiehuan");4 x- I% O9 U" l
- th.start();
4 e3 X/ {& }* w - }
& t% F# I. A. e3 r* T. Y - + R& ?4 r+ R3 v4 Y* `0 w) k
- function render(ctx, state, entity) {
2 L3 i0 m. J3 ^& D - state.f.tick();
7 c! d z( t, \6 g - }
, B% C4 u+ Q# c& R: v
4 X3 f8 ]) v) s- function dispose(ctx, state, entity) {
! \: z4 L: B# I. X1 S/ j - print("Dispose");
, e$ B( R1 d( S2 ]! K - state.running = false;8 r& ~. G! L- V* ~
- state.f.close();
, U: {! T; V. Y$ V" \$ f) P& l - }3 o+ J6 r% L& r& `
- 2 _2 n" Z. p- ]0 b
- function setComp(g, value) {
) {6 ^7 @% X% o7 }5 X; M/ g - g.setComposite(AlphaComposite.SrcOver.derive(value));, ?: `( S# }) w6 M9 |+ R$ L
- }
复制代码
! v O8 ]4 i h$ E" v5 N- }: J" o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。, { G. Q3 [, H; F- q: _" [9 H% n; F) m
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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), w) k, p8 T8 S. E7 o
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