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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。
" Y* T+ s, `/ `6 |' `- importPackage (java.lang);
, z% i) x9 s! b- T' [+ ^6 K - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));0 ?2 u# W7 l+ p: X7 A# b. y
- / _$ k8 b6 |. t; V/ H
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {9 e* [* c" K2 G+ k, E3 x& N3 u
- let frc = Resources.getFontRenderContext();/ m) V2 x) C! v) L) `( S
- bounds = font.getStringBounds(str, frc);
& d5 C/ ?; D/ T( A7 q - return Math.ceil(bounds.getWidth());
$ D5 h# a9 l, k# m1 d0 z - }
1 [6 d2 v! S; x6 g - $ O- I, d5 L; U! b- @% M
- da = (g) => {//底图绘制
% _* ^6 o/ n3 k% X* x - g.setColor(Color.BLACK);" q" h' v& Y# G" l% O4 m3 m
- g.fillRect(0, 0, 400, 400);/ Q, r0 W \( E/ E& r
- }
- K3 [4 P- \9 a1 {+ p1 ^( y
# c! T2 F# X3 x! p- db = (g) => {//上层绘制
# Q6 d3 F# V1 m; V8 E: Q; Y - g.setColor(Color.WHITE);
# ~1 V# h# D5 x$ N1 D1 s - g.fillRect(0, 0, 400, 400);
* @0 S+ y' Z3 c2 L - g.setColor(Color.RED);; R5 L% R1 l0 O2 l) N
- g.setFont(font0);* K6 F( x' q, J' _! |
- let str = "晴纱是男娘";
4 M- i( q3 `( u3 I% T - let ww = 400;
! B% k( }4 s$ l2 p- [/ v - let w = getW(str, font0);
' A! {& T- {5 ~( z) R2 G2 ]0 N - g.drawString(str, ww / 2 - w / 2, 200);: X3 u) Q+ j# O; ~: H; O
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- ! ^5 U( e' [, H; g. o# K- q [
- const mat = new Matrices();: ?7 |# E0 h1 ?/ Q
- mat.translate(0, 0.5, 0);( x+ x5 V( h/ x* K& }
* \. A9 `' s+ ^" f- function create(ctx, state, entity) {
- Y# o6 b# l; d, W T/ y - let info = {6 X) g4 t* f3 z: C3 I6 r
- ctx: ctx,7 U" }/ b ?+ p& p* j
- isTrain: false,
2 ?4 N' k2 X6 F1 Z8 D+ m - matrices: [mat],) `3 [$ V4 C4 r9 e2 h9 Z
- texture: [400, 400],2 x" h' F3 U3 z& {9 f% P
- model: {
. |6 a4 r2 u t! n( Q6 O! y8 a - renderType: "light",
# N7 d6 ]! G3 a5 K" f( g6 G( X - size: [1, 1],
$ L4 S6 Y: F' q# O' G4 H. I) z - uvSize: [1, 1], G$ }; N) {/ c- C- u4 K) x
- }
" d3 z( @% ~8 E - }
8 j3 m5 X$ W* Z0 j( c. i - let f = new Face(info);. J- |+ o0 f2 I1 p
- state.f = f;( |+ R9 o( T& }0 h5 e
) S: _# \& s& K1 I- let t = f.texture;
3 I+ {$ d. U1 s& j6 f. R" l7 W ~ - let g = t.graphics;9 h( o8 s+ W' ~, C+ R& A
- state.running = true;3 F! d5 P0 ~; s' f3 S
- let fps = 24;
% ?7 a2 a+ |& k/ k7 x& J - da(g);//绘制底图9 R" K" |" {4 q9 l6 K2 W( t; L/ S
- t.upload();
2 D1 o. p1 {3 @' ` - let k = 0;
, E0 a; e6 I1 R - let ti = Date.now();2 b$ x; ~/ }# o) A7 ^
- let rt = 0;
& T" n; I6 h6 E, ` - smooth = (k, v) => {// 平滑变化
6 ~) v, Y7 z* X1 n2 |3 P# P A& P4 { - if (v > k) return k;
8 I) |% R" r" n. x* M. m4 W9 v - if (k < 0) return 0;$ x6 A1 ^( ]1 _- n! a ^$ @
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;9 W+ X3 C' J4 N6 M& R9 {
- }
% v; F% d# s) ^& g - run = () => {// 新线程
+ ~2 C0 ^/ R3 l. b) y/ D. c - let id = Thread.currentThread().getId();& V, V0 P7 a4 c/ Y: V+ N, g
- print("Thread start:" + id);# M6 R! W H+ s) [& V
- while (state.running) {
, ^% C: t! e2 y! p5 S - try {4 c8 S, q6 p1 u" c: |4 b x
- k += (Date.now() - ti) / 1000 * 0.2;
. f9 |, `7 r9 ^+ L" { - ti = Date.now();& T" K A- ~3 `( I# d
- if (k > 1.5) {
* R7 d+ B4 k2 o* A; w - k = 0;& X( A: ~& R% e. D( A! J0 Y
- }0 b: N y7 [' p% Q
- setComp(g, 1);
`& u0 ?9 m8 v& |; o& N" g7 R - da(g);
' a- q7 B" Q) u" a5 w - let kk = smooth(1, k);//平滑切换透明度
) }/ j) u4 e) I9 [- { - setComp(g, kk);
+ f& |) t* M- j) f1 z - db(g);: k. {1 K: ]$ ~& f
- t.upload();
( n2 j7 ?- N; N0 ?: e7 j - ctx.setDebugInfo("rt" ,Date.now() - ti);
7 u, R/ ~4 j# a. n# q9 h, x% O- E. s - ctx.setDebugInfo("k", k);4 @1 p1 \" ~& d' C
- ctx.setDebugInfo("sm", kk);- f, ~" O- c" t6 V- S
- rt = Date.now() - ti;
o9 |/ m" l5 e( P: v. { - Thread.sleep(ck(rt - 1000 / fps));7 p Q( G1 H4 J) E
- ctx.setDebugInfo("error", 0)
, E9 j) G3 r* ] - } catch (e) {3 w3 O/ x: B' x
- ctx.setDebugInfo("error", e);9 ^, o! W C: y1 O% A
- }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
# d* k" t2 l S - th.start();
" Y' w! ~' Z& i# u W9 u - }
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; j+ L% b m {! Y- function render(ctx, state, entity) {* z8 [$ s& K2 }
- state.f.tick();" f v6 ?. Q2 i, o+ d
- }1 Y9 ?4 f9 @% W7 }8 t
- 9 Z2 `& G* r* E* }0 ]: A% @+ h
- function dispose(ctx, state, entity) {
! q5 f( }* x" ~2 d# w) x( Q - print("Dispose");
: ?0 \( W$ P. A" m9 ` - state.running = false;
4 b9 S# V% v/ w& X8 L. h, } - state.f.close();
7 M" j0 Q1 T( z+ b; c% s* z - }
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- function setComp(g, value) {4 d1 K. H# n* v8 ~' @! E, j3 `
- g.setComposite(AlphaComposite.SrcOver.derive(value));5 o g* Y. d0 b- g% c
- }
复制代码 # m/ N& r; a1 E' n/ |' r0 ?( B
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。! B) t: o% K* W+ p8 U6 B
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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)
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