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& P, M, L: I. j; J' i4 ?( i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。* V" c5 V& e3 r% k0 |/ {
- importPackage (java.lang);$ i( P) }( y4 _+ |
- importPackage (java.awt);# g/ B3 z9 U" b3 K8 Q
- j4 e4 l$ A6 m& ~- include(Resources.id("mtrsteamloco:library/code/face.js"));6 M0 o; e3 ^) r# T* ^
. ~) L+ Q3 F4 e; d- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ ^1 g+ `/ k% Q) @) s
- 8 T" C8 C$ e0 W3 W; j2 N1 ^
- function getW(str, font) {$ [9 g% W5 m" d. F. A5 z
- let frc = Resources.getFontRenderContext();% W& {( n: `9 g8 N# G3 Q
- bounds = font.getStringBounds(str, frc);
9 j2 o+ |- d0 t# Y) R5 A; X* q, K - return Math.ceil(bounds.getWidth());
8 A2 l# g3 G) }( I; |. [ - }+ F4 u( g/ h2 u U) `
- " T; b3 N$ M' K9 ` D" n- B+ n2 I1 L: w$ x
- da = (g) => {//底图绘制6 [) K: n& T3 E/ `( ^& Q% P5 }
- g.setColor(Color.BLACK);
: d! d4 y3 O: |1 s+ B# J" x - g.fillRect(0, 0, 400, 400);
6 {5 n/ n. Z9 c* K6 Y. \ - }! Q4 y5 f" z2 B7 {3 D' w" P7 N
- , C$ T1 Y3 j6 T" A# v
- db = (g) => {//上层绘制
9 T+ i: l- c0 ~8 ^. b/ ?' W* [ - g.setColor(Color.WHITE);, L0 K& k; j, S, R4 a
- g.fillRect(0, 0, 400, 400);
) P9 ?9 e9 A6 ] - g.setColor(Color.RED);
: m0 B( c# Q& S6 i# \7 K - g.setFont(font0);
' }4 r; C9 a# Y/ V - let str = "晴纱是男娘";. @0 q; c; [4 F9 G- k" c* v& c
- let ww = 400;7 [: i! Q2 z6 Q5 p5 T5 v+ ^
- let w = getW(str, font0);3 e' D# }5 v: H; _. F5 V
- g.drawString(str, ww / 2 - w / 2, 200);
# B3 l' e6 \6 x, } - }
9 d4 P1 e- C3 I4 J+ A- I) \$ ^
" b7 n" X+ D" H' R* S- const mat = new Matrices();1 m( A3 v, D; h
- mat.translate(0, 0.5, 0);& ^9 O9 K/ f5 _* }
- * W: I- D" N1 q7 B/ h+ G; O
- function create(ctx, state, entity) {
# M4 @. ^: ~" s* ` - let info = {
9 z- ~: v0 @ s( @; f1 _0 @ - ctx: ctx,$ M; {. g6 X! e, X( j6 f V
- isTrain: false,
/ W& F* C% `$ e, m% } - matrices: [mat],( V) b3 `" d; n
- texture: [400, 400],
# n9 N4 |, {! m% h. H - model: {
4 |1 G7 X( u2 J4 ~2 Y* P - renderType: "light",, T1 V( Q: r! Q
- size: [1, 1],
: H6 \) J: Y6 D$ G" w# k - uvSize: [1, 1]
9 U( g: U. J+ R - }3 d' c" {% j) k" x) F* D* h
- }
- Z* v. ~( y) B* D: E3 t - let f = new Face(info);; `6 C. N( D0 n2 ^) c" V
- state.f = f;% |' f, S7 ]" |1 T
2 w- e, W/ }6 S# w' O$ D/ G- let t = f.texture;
# |1 d5 I- N+ D/ q - let g = t.graphics;0 X9 ?8 o- m- M- E2 ~+ O
- state.running = true;# b! J6 |) `" g
- let fps = 24;% Q9 E3 ?$ v$ k. O9 I7 s
- da(g);//绘制底图
" }8 u8 F2 E g# b& d7 m - t.upload();+ H( n0 U5 G2 G/ _
- let k = 0;
. ^% _; N' ?. }, O% z- k' R - let ti = Date.now();
" n, Z! j1 a0 A& d+ ` - let rt = 0;
3 P% P# E: H; J2 B( P - smooth = (k, v) => {// 平滑变化5 s3 G8 A6 U [6 M5 d
- if (v > k) return k;% v1 M/ ]: x7 }% l! p+ V
- if (k < 0) return 0;
. V$ r5 V4 u6 T" |' I# u - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;$ s* M# T5 I; d5 g/ s0 H
- }
- B) a6 s; w" s+ r& k5 Z& S - run = () => {// 新线程& c/ a% h1 l. }" r/ s7 C7 B
- let id = Thread.currentThread().getId();
' P: y! w& D0 s1 m! a2 y - print("Thread start:" + id);! L, f4 z3 Z( q! F9 x- P% r7 c
- while (state.running) {$ l. n9 l9 J- ~& c( G' K: _/ h
- try {
3 b+ u6 f7 { \- K3 ~( ^ - k += (Date.now() - ti) / 1000 * 0.2;- }# n6 J; E( Z) p0 t* j. m
- ti = Date.now();/ u u' I6 |% r8 j
- if (k > 1.5) {! Y* c% F; L6 T; W2 p
- k = 0;
& [) D1 Q D2 n- Z# U( n1 `0 d - }
6 u/ Q% H, N* w: y' b0 Y$ ^ - setComp(g, 1);3 X$ w' x) i" M
- da(g);
* g: Z4 v9 a, a( E4 ?+ C, [) P - let kk = smooth(1, k);//平滑切换透明度: x" }2 N, G R4 D
- setComp(g, kk);/ y0 A8 z# L2 E$ h6 }9 a8 E
- db(g);( S$ [: @+ U0 D. r& a
- t.upload();
( i2 y5 ~9 L& |8 x) i - ctx.setDebugInfo("rt" ,Date.now() - ti);
5 g6 u0 m$ h) J8 `, D2 n" ?$ d, T - ctx.setDebugInfo("k", k);
* p3 T2 Y7 b" s9 U E8 I - ctx.setDebugInfo("sm", kk);# e3 V$ `5 K) F5 a$ \+ v, R& U$ R
- rt = Date.now() - ti;
4 |! B- U4 t/ d% N+ ] - Thread.sleep(ck(rt - 1000 / fps));- l; q0 M {# J7 V
- ctx.setDebugInfo("error", 0)
; e/ d7 v0 n+ ?* L5 V4 T - } catch (e) {4 Y7 @6 W- _. ?) ^8 p9 B. e$ n ?
- ctx.setDebugInfo("error", e);
* J/ Z& G2 G5 E - }3 i, W0 K s+ z
- }: p8 W. S( V% U7 C6 v# f
- print("Thread end:" + id);
4 u' P4 @/ Y$ L; d9 Y1 C; T - }% ~% f8 w) @" R, X( D5 b A( R$ M
- let th = new Thread(run, "qiehuan");% E( D9 B8 P7 P _7 R: k/ D1 r
- th.start();) K9 E/ v t8 D* b0 C; ^4 ]
- }
' R' Z2 f) r0 i% m+ Q" I1 Q. N - 8 x# b0 m. j B) p7 Y
- function render(ctx, state, entity) {
1 p' i8 J- H7 q/ u, b - state.f.tick();, T; X/ y; Q, m8 p
- }' J3 r3 D+ ~( J; t
- + e0 ~* U _" A7 x8 E q a6 L. U$ P2 V( O
- function dispose(ctx, state, entity) {
L% H% L9 {4 k3 g0 b. {3 c - print("Dispose");# `! h+ i* ]/ p. m
- state.running = false;0 @3 j# ]" @! t2 v( ~7 L8 z( n
- state.f.close();
2 T7 H: b- |7 I! o# ~+ p8 _ - }
! W+ p' r8 A* q+ h+ A% ]' H! A - & w$ u( _1 J% o! W; @
- function setComp(g, value) {6 F5 ^( i$ O- p( o1 U
- g.setComposite(AlphaComposite.SrcOver.derive(value));
1 E) n1 X& l1 }" {4 A- A - }
复制代码
2 G7 ]# S. Z6 L4 Q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。' d2 A" b B. D6 ?
" @: J5 u9 K' K$ O5 l) o
5 k7 \' N% h0 w# d9 X5 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)9 F1 ^8 m7 e7 a2 `5 M1 N
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