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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。
. _8 V' C1 ]1 s3 \" h% d- importPackage (java.lang);
1 G l V" R, c& H: C8 G) s - importPackage (java.awt);- ?$ @2 x4 V% z. P7 U S# z$ @+ j
- 7 Z* U* ]5 F; h
- include(Resources.id("mtrsteamloco:library/code/face.js"));
% f: b: J9 E2 o+ D+ D* D - 7 i9 m) ]$ M: S7 \
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);3 A7 g1 [' g$ l' A. a
- " k. R8 V. T! s# y, T6 F
- function getW(str, font) {3 _4 l: u1 ]# M9 P6 W! w5 P
- let frc = Resources.getFontRenderContext();
* f6 ^1 s5 q& O- H - bounds = font.getStringBounds(str, frc);
2 h" ~/ m+ |5 L$ a( i - return Math.ceil(bounds.getWidth());, F* r4 M9 w5 y
- }) \4 a2 s7 H' I9 }) a% n
- : U9 s5 x6 A: K4 A; E* ]
- da = (g) => {//底图绘制' N4 _$ p# c& T, F4 d
- g.setColor(Color.BLACK);$ o4 z8 P" b/ B8 v+ [6 h+ u. `
- g.fillRect(0, 0, 400, 400);% k \2 M4 U$ K% n/ N6 V
- }
2 h3 U* H, y- n9 |* `$ l" @( R# r
, k2 c7 |; |$ Q: Y. B' t5 _' z- db = (g) => {//上层绘制
* P" e8 y3 q8 V7 d8 ]1 z - g.setColor(Color.WHITE);
% e D( G1 E, R6 k8 Q - g.fillRect(0, 0, 400, 400);. k# u4 y5 }) G) Y) p8 q
- g.setColor(Color.RED);: Q2 P! P7 y" g8 b( j# p% P4 ]5 r
- g.setFont(font0);( s& v1 \- t ^! l5 h' O9 w
- let str = "晴纱是男娘";" T" f, r4 S& k A% ^$ I, ]# i
- let ww = 400;5 e3 L! ?. a; K: _* v
- let w = getW(str, font0);
% c6 Y, d1 t3 a3 W: h - g.drawString(str, ww / 2 - w / 2, 200);3 q4 Z8 R8 u7 W6 \
- }
% C/ E8 Q) l. U9 |8 _+ S) O
% |* H) `$ g1 P( L* {0 ]$ R2 {) K- const mat = new Matrices();' A& M6 s8 X0 t% c: o
- mat.translate(0, 0.5, 0);, T- J4 \2 G; T/ l/ E5 s9 b7 x
3 @# L# [7 F9 |/ R. t- function create(ctx, state, entity) {/ Y1 T6 o5 m! ^
- let info = {
+ Y1 {4 ~/ l! P& H5 ? - ctx: ctx,5 g0 S N! h# l4 z, f
- isTrain: false,
/ Q9 w0 w; Z) z - matrices: [mat],$ q! C6 C) }/ P- B
- texture: [400, 400],8 }# l. C" C' X" a3 [
- model: {
& Q! e5 ?" n. b9 |, I - renderType: "light",; W2 v# D" ?0 g) @& i% \) z( Z8 j
- size: [1, 1],7 q5 f$ e; K7 {3 I% v' T
- uvSize: [1, 1]/ j5 A4 O1 J! }4 [" d& \
- }
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- let f = new Face(info);
( w, M+ V8 @" G! ?: W# t7 H - state.f = f;
f, e/ k3 k9 t; p, @/ S0 I - " H7 y7 h8 H. B! F( o/ |6 Y
- let t = f.texture;6 B% w* o2 `8 P; M3 r; p
- let g = t.graphics;, ~2 f& K5 h1 }
- state.running = true;; S6 }2 X+ w+ e w2 E3 e; F/ b
- let fps = 24;5 M- R* _7 A, ^
- da(g);//绘制底图
& ^2 m: N. B- V4 r8 L6 H/ j - t.upload();0 J7 Q: e8 z8 }- t) Q, m5 B
- let k = 0;; h- t4 ^/ [0 ]; s
- let ti = Date.now();
. R. u1 p1 I' M9 x# {) v - let rt = 0;* F9 F _* W- y5 m( e7 H5 u
- smooth = (k, v) => {// 平滑变化' _8 p% ~/ u9 f( X3 Y9 ?$ }
- if (v > k) return k;
+ ]8 e4 F6 Q1 S; Y - if (k < 0) return 0; L9 R5 S6 b; d3 }( G( }
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;' [/ b; ~+ r" M: _; a9 d. u0 y z
- }
; f) R/ e% c7 T g6 v9 h - run = () => {// 新线程
$ {* d, A+ V* j8 x$ W/ c* n - let id = Thread.currentThread().getId();
; L% @" @: w5 |# k7 U - print("Thread start:" + id);
+ h! j2 j( h& b3 b: _ - while (state.running) {
x8 n' q6 M U" W3 k* \# ? - try {
3 c& ~ V/ d3 I( t/ m - k += (Date.now() - ti) / 1000 * 0.2;
& [/ X: a2 w; m4 B3 {! j- c8 R( n - ti = Date.now();
% E! a" S, u/ ^3 f" d% ^4 |$ \ - if (k > 1.5) {
0 ?7 n) s7 o& S - k = 0;
8 `( ?' b' ?" B# _0 e - }
: O& m" |! @& H* Q E6 x5 N - setComp(g, 1);
^6 s1 @4 @+ r0 q# _+ V - da(g);
. A) n" v' l+ r+ a+ c9 c - let kk = smooth(1, k);//平滑切换透明度
F* Q: z6 w) a9 \) }- X1 B - setComp(g, kk);8 A9 P5 g) L1 e( @. \* C' y
- db(g);
4 r! g, R6 I+ _$ Y- P1 Q - t.upload();3 V% o: W' g; J' p+ \# X# Q5 V
- ctx.setDebugInfo("rt" ,Date.now() - ti); L" X3 s5 q0 h; }/ i a3 ^
- ctx.setDebugInfo("k", k);
2 ~$ H- ~8 @. k% ?9 H) \& N0 N - ctx.setDebugInfo("sm", kk);
4 S1 X& `, W( V, `: k4 m' s1 ~8 { - rt = Date.now() - ti;' c/ j) F8 O R
- Thread.sleep(ck(rt - 1000 / fps));- f3 @' c7 @! t' R7 r) Q
- ctx.setDebugInfo("error", 0)7 S* B9 Z! m' A! J. H
- } catch (e) {0 Q# O- W# v! N k _/ h0 q4 q
- ctx.setDebugInfo("error", e);+ k4 R& n R0 F1 k" h5 n# q2 ~* x$ G
- }
+ r2 t$ }# A1 c1 D; W - }3 e$ ?8 V" b3 Y @& q" @
- print("Thread end:" + id);- C1 e0 |- p& t& _- }, y- G
- }
& k4 i- Y5 h% z. \4 } - let th = new Thread(run, "qiehuan");7 h- q: L+ R" v1 s
- th.start();
3 Z- E2 e6 \1 Y r' r. s: l - }; j7 O3 Z. ` _6 J2 e5 w
2 n. r* y% d6 a; `. U9 I- function render(ctx, state, entity) {
8 T) G+ m0 W9 t* } - state.f.tick(); h' L4 R: v0 \) \1 C( c
- }. z7 ^: p5 M) v; ], l8 {9 I9 e
- ( n% P, T: |2 U9 E" ?4 C
- function dispose(ctx, state, entity) {8 ?/ w* t, A" n, w: I
- print("Dispose");& W- g3 {1 c; _8 x+ \/ A! A6 t! ?" k
- state.running = false;" X/ }# u U( v8 J
- state.f.close();
* `* w, D2 a) E - }
6 |/ X- m" f3 g: j: j - 5 A8 A- u4 L; {; R. r4 _+ Z0 Q) q
- function setComp(g, value) {- R# c ?; m+ p% W$ y
- g.setComposite(AlphaComposite.SrcOver.derive(value));
2 L l# c) g3 x& j - }
复制代码
5 U: @2 W. k: M6 w; [2 ~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。
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# x3 e# `$ m/ w8 f; V顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)) v+ j0 }* P @( b
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