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+ O, _5 z4 G; u) x" n9 v* K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。
- T1 U9 i" T! h9 e3 W$ I$ o- `- importPackage (java.lang);2 R8 G2 w3 t* G! N; R4 m
- importPackage (java.awt);5 I" U9 T# F+ w5 ]+ l
- ) r% e2 W0 P& k8 R& n; M
- include(Resources.id("mtrsteamloco:library/code/face.js"));1 c' a# o- K) ?
9 U, M* a2 d3 |! r+ O7 \7 x. c- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);8 H+ p8 f5 |* s# ]; U x/ I$ O
# P% W1 \ [& F! w$ n; e, ^& _2 k1 o- function getW(str, font) {
- E/ a; ~1 _; T3 T' y8 n - let frc = Resources.getFontRenderContext();
' G6 U; n4 `7 b - bounds = font.getStringBounds(str, frc);
7 U8 q2 R9 A3 g) t, y$ W - return Math.ceil(bounds.getWidth());
6 b+ S5 y+ s+ n1 b9 \' o* e8 q* F - }
9 U5 L7 n/ e! j+ B5 S9 ~
$ H o' K, H4 B: v9 L. `9 F- da = (g) => {//底图绘制. K; }6 o4 z4 h t
- g.setColor(Color.BLACK);
- |( l# n! a* L - g.fillRect(0, 0, 400, 400);' Y/ c4 B* Z7 z( i$ B. k, [3 @
- }1 Q! [& i. v" N: D/ P
$ ^$ w+ y6 ]$ ~7 z! l3 ~# F, A. m- db = (g) => {//上层绘制% \8 Z! ~: z" a+ b
- g.setColor(Color.WHITE);
t, u4 q0 d8 L3 m$ T: T - g.fillRect(0, 0, 400, 400);
' K% f3 k5 W6 i4 \- p# Z - g.setColor(Color.RED);
3 X' u4 o7 K8 p' f; i1 R2 P - g.setFont(font0);
; p6 G6 n) P& X - let str = "晴纱是男娘";
% i, b g* u( x2 C' x6 B3 u - let ww = 400;# c, L1 q% N2 e+ g2 Z1 n
- let w = getW(str, font0);
, _( Z$ Z; D j) I - g.drawString(str, ww / 2 - w / 2, 200); k; }$ w2 ~0 n$ l+ N
- }
; ^% Z2 z' Q$ ?( O0 a - & ^* F+ V5 A9 B6 n Q
- const mat = new Matrices();
! o D8 X3 X7 S& Z- B; C - mat.translate(0, 0.5, 0);
2 m/ y' F* S! b( `7 Q) R: h
; T7 ^4 w. I. b. `% }% z- function create(ctx, state, entity) {
* L% S4 ~, W5 `1 x5 S' I, e - let info = {' ?2 l: \' U/ I9 Z% D `" y; o
- ctx: ctx,% D5 e4 l) g$ Y4 S5 v+ A: E8 m1 [
- isTrain: false,5 M4 F4 i H' q
- matrices: [mat],+ Y5 }1 r1 c) N: q ^) t2 _( V0 s
- texture: [400, 400],! M. ~% k) l( C- ]
- model: {
' P& ]4 k2 F* p - renderType: "light",
" ^ @9 W' O2 ` - size: [1, 1],
# [* W% r# z8 h7 V- _( e - uvSize: [1, 1]) D, z" V% E9 N' N3 {
- }
R$ b+ h6 a6 L; n$ V, \ - }
) k* l* o: B# d' u - let f = new Face(info);
/ F0 p3 R3 H6 n$ ~0 f v+ I6 H - state.f = f;/ F7 @7 H& l2 M
- 5 k+ f1 k! j- y1 @8 U
- let t = f.texture;
3 ?3 {, z5 W0 W+ { - let g = t.graphics;
9 A1 P3 v; u9 P' _, f H$ i7 K - state.running = true;
# H0 z) o( z/ J+ o7 A v+ d - let fps = 24;
* s: Y9 _8 O. M5 V# z% T - da(g);//绘制底图% M, b* L7 X" Q
- t.upload();
* ?+ e: c7 S8 W$ M& r& s0 Y - let k = 0;/ l7 u% v. `0 F3 ~" K7 i
- let ti = Date.now();
3 N0 r# V. ]2 C7 G; r) q - let rt = 0;
1 ]4 Z' f8 \" X) r, L4 u - smooth = (k, v) => {// 平滑变化9 T, ]. P2 V# T. u: a/ o
- if (v > k) return k;( z8 _& T- \4 e
- if (k < 0) return 0;
2 t7 x: }$ T* y6 A - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( e4 R7 ]8 N; _5 s. x) x* B
- }
) k+ l$ ]' C) h5 \, ^- B - run = () => {// 新线程* t- P' G/ a A6 I
- let id = Thread.currentThread().getId();+ a2 S5 l, D( b! a5 X. W
- print("Thread start:" + id);! w% Q6 f2 f" A
- while (state.running) {
T. i( z S6 A" ~ - try {" j2 a& C6 `) A& x2 V# I7 v: _
- k += (Date.now() - ti) / 1000 * 0.2;
9 u- v4 n4 d) d# m1 X& l3 R! m' q - ti = Date.now();
0 O. N' X U, @: e- D8 `' s - if (k > 1.5) {9 t# I+ T. H1 g# `
- k = 0;
7 n8 Y' w+ @7 i# a7 [$ p- q - } y) H% l9 M5 T# X
- setComp(g, 1); E, w Q: H2 G( r
- da(g);
- K' d- `% ^3 @- C4 W+ G - let kk = smooth(1, k);//平滑切换透明度
2 n1 \/ Z% E6 U# V+ f j# L9 t/ Y9 G - setComp(g, kk);: \) c# C$ o! W( W# l, c! o A" s
- db(g);8 ?2 ?6 t7 f+ P6 k9 `' a
- t.upload();# Q+ ~: I# x( ^" x& S
- ctx.setDebugInfo("rt" ,Date.now() - ti);
2 K4 W( a- H+ M) f - ctx.setDebugInfo("k", k);
6 _5 _6 a8 f% x% l+ \; e1 C5 u - ctx.setDebugInfo("sm", kk);
9 R: }' O! f1 M$ u$ ]9 L9 v( ]% a - rt = Date.now() - ti;
2 n1 y2 f8 ~8 j! ], K - Thread.sleep(ck(rt - 1000 / fps));$ R B( J1 [" @! p1 P/ C6 g
- ctx.setDebugInfo("error", 0)9 i" X3 N$ _( B8 x4 I# z
- } catch (e) {
6 \4 b1 N h1 D/ X. a. q - ctx.setDebugInfo("error", e);
( ?/ X! s" g7 e7 g% {% s - }
( s& M7 m/ ?, g1 \( s) w - }
3 k' {6 d$ _) w - print("Thread end:" + id);
2 ^8 z/ J1 f. V - }
6 }0 j# \# K5 m3 @ W$ Y - let th = new Thread(run, "qiehuan");$ j+ \1 y1 {, [/ Y% C
- th.start();
4 V q6 @4 ^ [2 K - }
/ J/ v% j7 y8 r* `
) J/ k1 V( a2 E' Z: b% N- function render(ctx, state, entity) {9 m. @& Z1 Y& M! Y" \: Y; W
- state.f.tick();
# p3 }$ V, X; r0 X, X% @ - }
: p. k0 N" a( I' e
5 q7 h% X! H* X# X( y9 x0 l+ m- function dispose(ctx, state, entity) {% Q$ @0 ]: A6 p( R: t
- print("Dispose");
; f0 ~5 e* {; c# m - state.running = false;# d$ H4 v- b0 Y
- state.f.close();
5 B- `, Z2 M: p, z( ^ - }
0 Y6 m/ C N( g+ {/ u8 c - ' ~# K2 q2 R" V6 R, R {
- function setComp(g, value) {! d3 S( Y5 n( W4 e9 j# {
- g.setComposite(AlphaComposite.SrcOver.derive(value));) P: S- g8 u F6 d T1 B5 g# E, S
- }
复制代码
8 C2 u }0 T+ |% X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。
" o4 z9 ?* X3 d. A/ c6 L! a6 D$ M( L6 r @2 {5 L- Z
4 x) g- r9 U. h: ]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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