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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。
4 I2 H4 ]0 Z4 j3 b/ M4 f- j/ |- importPackage (java.lang);
- P, @* u$ ]9 j2 E( |8 [2 x - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
; Q( M* w: d, S; J- {
# V- u: j( L9 X7 F/ f( a- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
" ]! C* \* j+ Z8 b% i' d. a& i
) _3 I7 ]. G" S- function getW(str, font) {0 `$ [. I" R+ Z/ p! u7 `# O8 U
- let frc = Resources.getFontRenderContext();. M/ }& T% T7 ]3 r0 g. e
- bounds = font.getStringBounds(str, frc);3 O6 b% A" c( c/ I# \* ~
- return Math.ceil(bounds.getWidth());
" o* q' f$ U: Z8 }3 r9 _+ M9 w - }
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- da = (g) => {//底图绘制+ h2 y. Q# o# D9 L, X2 t
- g.setColor(Color.BLACK);* D6 H+ z1 a3 Q" O) C
- g.fillRect(0, 0, 400, 400);
7 a% o. h8 K! h" |6 ~* H# t - }
& [+ g6 ~ {8 Y
+ W% O; Q' [# R& l9 O- db = (g) => {//上层绘制$ e, Q# w4 h4 ~! `. a. V
- g.setColor(Color.WHITE);( N, ]" B2 }1 N8 ]' J4 X
- g.fillRect(0, 0, 400, 400);
* ~: f' Z+ ?2 ?" n: R" m1 ] - g.setColor(Color.RED);) p/ }. D5 }- o' b# \
- g.setFont(font0);
7 y( f, }5 g6 F) | - let str = "晴纱是男娘";' X6 l6 G$ k+ ], p& U- [# b7 j
- let ww = 400;
/ H W. T/ O. ^5 H& R - let w = getW(str, font0);
R2 O" M# X2 |* c% z - g.drawString(str, ww / 2 - w / 2, 200);1 K0 I2 ?! v$ _/ Z" ^7 g& c
- }6 {) O5 A3 ]+ O* f: w* Y( i$ n$ x
7 ^1 I" I" N" k- const mat = new Matrices();2 Z, N) x" F: F
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
% b, e3 X& S4 B( ^' v - let info = {
. D, Q2 ?: s4 b, Z - ctx: ctx,: R! b8 g5 e! n) I
- isTrain: false,
& J4 |% R5 z7 ~* ]! Q, ? }% W, t - matrices: [mat], Q7 S& j0 h0 [8 e/ r9 ^- q: C7 v
- texture: [400, 400],
# s" M$ h7 Q0 p! f9 m" k+ _ - model: {
' S |# X x) H; c: ~ - renderType: "light",
/ T" U$ ^' W4 w! k8 L1 g) a - size: [1, 1],
0 E0 _2 T& {" |" f7 ] - uvSize: [1, 1]& I7 D* Y, V+ B, c- A4 q
- }
( I$ s" R5 b" H4 u7 l2 d# ~ - }
' v$ w) g2 I# L: u% A8 u: m - let f = new Face(info);
- N% [4 k% o( O* M4 | - state.f = f;
6 d$ k" ]9 g6 ] - 6 Z4 Y- [; N- t& Z8 Q
- let t = f.texture;* p, }4 m* g, a. L+ G; L0 ^% C2 }/ ~
- let g = t.graphics;
9 v* a4 M3 o- H$ ]' O$ q, ? - state.running = true;
+ R4 s( Z! h c - let fps = 24;
f+ `8 B& r1 w( F+ ?8 x, _! o" O5 V' e - da(g);//绘制底图3 i& M2 v' v0 P
- t.upload();
/ r! V" ]: k. g - let k = 0;
6 r) K+ ^0 }+ W9 k9 l \ - let ti = Date.now();
1 y \& ^$ K0 c7 N- K - let rt = 0;* y1 W5 G- z1 Z* T) C, a
- smooth = (k, v) => {// 平滑变化3 I7 C- h. i* y% P
- if (v > k) return k;' |% X4 U6 V2 [: J
- if (k < 0) return 0;
, [' y2 X' d6 v- s - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;8 M6 R) ?! H' _* u+ Y" C
- }
4 e* m G/ \/ I) [6 F1 ` - run = () => {// 新线程
* k6 R9 q, P# H$ Y - let id = Thread.currentThread().getId(); f, @& A% [2 B" d g9 i
- print("Thread start:" + id);* a# I9 u- o4 u! F; D% y
- while (state.running) {3 C: F5 B, ^' p
- try {
; Y1 V( T& J) F) T- v - k += (Date.now() - ti) / 1000 * 0.2;! L* M9 _. X! m! Y) E! {- U; ^" ?
- ti = Date.now();- ?: q/ \" k7 s* c' O7 q9 T, T6 e
- if (k > 1.5) {2 ?! Q8 C! Z$ x1 `# q; A
- k = 0;
% f# c, H/ I) Z# q# ] - }
; _" [- S) `9 x - setComp(g, 1);
' }! `# T3 O5 |* h - da(g);
+ D9 b, U! P( s& O3 O - let kk = smooth(1, k);//平滑切换透明度
' X7 y- _6 n* P* B. ` - setComp(g, kk);
4 H! |4 ^- _# P4 M7 ?3 x, Z8 M - db(g);
; e/ R! r; }% ^3 e$ z( E9 t6 [ - t.upload();
, m! A/ l2 Y- j! }* g# f+ s/ o% C - ctx.setDebugInfo("rt" ,Date.now() - ti);
; R) \0 J' s) u: n0 I - ctx.setDebugInfo("k", k);( l3 b; r5 K3 n. Q2 j4 D' w
- ctx.setDebugInfo("sm", kk);) Q/ \* G1 b8 C% h& h- p5 J8 D- m
- rt = Date.now() - ti;3 _7 y. X- e1 r; t2 i
- Thread.sleep(ck(rt - 1000 / fps));
/ }5 j1 r4 Q; X; L - ctx.setDebugInfo("error", 0)
/ h/ F4 r' o/ @$ T( G! Y; L - } catch (e) {
* s9 U2 v& E+ E. _' P - ctx.setDebugInfo("error", e);
: r5 n) n: u I; a1 T4 ~* k E) I - } h( Q' ]: j8 ^1 o
- }
- U7 ^) M0 {& Z3 n* y/ |# q - print("Thread end:" + id);
: D/ X2 M; y/ f* E' q - }
9 K' L/ G0 v2 v: I$ p( v7 _+ P) d - let th = new Thread(run, "qiehuan");
' B7 I# V) n( A+ H - th.start();
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- , i$ C4 P& E0 z& {4 x7 f
- function render(ctx, state, entity) {
- O) B* D: D" J - state.f.tick();7 k- m6 K4 G; D* A( G
- }
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; P+ r$ w$ Z' }! Y3 R$ j7 y- function dispose(ctx, state, entity) {% Y' ?* R' ]& m3 v, d2 v
- print("Dispose");1 T0 ?! G7 V) W5 i; c, L
- state.running = false;
8 U: t& n$ r! q6 c - state.f.close();- y/ @* q, ^+ [
- }
2 }4 B, a0 w f2 H6 }9 e
4 L% @2 b" s" T9 ]- K( `- function setComp(g, value) {
$ x5 n5 \; n8 y - g.setComposite(AlphaComposite.SrcOver.derive(value));' h d. X+ [& r& u/ h9 O
- }
复制代码 * |3 N' b3 Q3 w; t
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。
+ [* f! c6 Z9 l6 T; S+ Z. G |9 i7 b8 Y9 C: b/ U/ ~! M. e* @
1 y& m( o2 t, z- R4 J, t# ^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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