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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。
2 A+ ]' s, c$ Y9 r" T! q9 ?' O0 q- importPackage (java.lang);. ~& [ a" W: J& }7 |# n& i, A! Y5 R
- importPackage (java.awt);
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6 E, H- G6 |0 K2 X0 a$ O U- include(Resources.id("mtrsteamloco:library/code/face.js"));
- x5 }% X, n7 E M
0 y+ e3 ^4 l$ y- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. h: [5 F: [! X" y7 F3 {
- 3 g5 |- a& J) B: k7 F
- function getW(str, font) {
& @, Y0 x3 j/ h - let frc = Resources.getFontRenderContext();
+ @% Z& Z" e/ B- ~: r4 I - bounds = font.getStringBounds(str, frc);, u/ G. N1 ]/ C
- return Math.ceil(bounds.getWidth());
1 E L4 K5 ~$ M2 u3 y - }
+ A- l0 x0 a& ~0 @
/ [, n3 C' x) o5 F* W& I- da = (g) => {//底图绘制 ^ t6 Z) Z/ C3 D" I8 c6 n; b6 v2 ^
- g.setColor(Color.BLACK);
7 o1 o# G- A( R- H O - g.fillRect(0, 0, 400, 400);
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) ], r4 x, x8 e9 Q- db = (g) => {//上层绘制& C V, @% |/ ?6 h% c, d9 R
- g.setColor(Color.WHITE);
/ a1 V+ {. a, m% u2 V$ n- s ^" W - g.fillRect(0, 0, 400, 400);" m5 ^' b: l- R1 ?
- g.setColor(Color.RED);8 J/ i7 D; t; D
- g.setFont(font0);& d# j9 o$ K; S B6 @9 k
- let str = "晴纱是男娘";
% X; m" Y- o5 N5 j4 X2 x1 Z$ l - let ww = 400;
9 g, |7 w, W8 ^9 F; O. r5 n - let w = getW(str, font0);+ Z4 n6 |5 ]7 P0 @5 l9 o' Q) e7 |
- g.drawString(str, ww / 2 - w / 2, 200);
6 }' u! E. T7 i" n; z - }
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* v5 y, N# Y5 _- const mat = new Matrices();
) n; p" ^" ], b: | - mat.translate(0, 0.5, 0);
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0 B" `5 c2 l" ^/ l* h3 \# e$ B- function create(ctx, state, entity) {( t! g7 O% D8 x `$ W/ |
- let info = {: S- {# t, [7 X' R0 P4 H4 ]9 f
- ctx: ctx,
. H: u# ?# X- E: E/ g - isTrain: false,( @& k- R4 @4 G6 r) V
- matrices: [mat],
1 X T( O% G" v* Q2 Q! A) s& K% U - texture: [400, 400],
' e& z& J# C5 {& `& |% Z- B5 r - model: {
}6 z2 p/ Y7 P - renderType: "light",) A6 B" Z# q7 }8 P7 R
- size: [1, 1],
- H3 k3 `4 W- Q) Z# }: u - uvSize: [1, 1]/ ^: r" `) F$ v0 t& Z# [! C
- }+ z; e- u W2 G' ]$ p; X- S
- }
, j/ i4 U! U2 p: J - let f = new Face(info);( l4 ]1 W2 Y# G
- state.f = f;
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- let t = f.texture;0 M$ c# k- Y4 n/ b: Z
- let g = t.graphics;0 z! \% W& |% p+ t7 F7 K0 c5 B: O
- state.running = true;
, ^6 k7 Q' i3 K - let fps = 24;5 S6 r& ]9 a6 _: x" r
- da(g);//绘制底图( t9 h: F0 m- ]9 L" u
- t.upload();
9 L2 _# h: E- S; |9 L0 m9 z% e - let k = 0;; V2 d @# r# a* n, p
- let ti = Date.now();
4 f! R7 i6 ?- K* H4 I - let rt = 0;) N5 b$ h1 ]7 e. z$ J: @
- smooth = (k, v) => {// 平滑变化
/ W- v, w1 E! c/ W, O; b - if (v > k) return k;
1 l) K# U: h- Z7 P - if (k < 0) return 0;
/ g/ E1 w$ K/ N7 ?9 ^, m# Q - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
f# G/ r9 r- V w$ F2 \ - }
7 V P5 @2 w, s - run = () => {// 新线程
. d8 r3 \; n5 h; Y - let id = Thread.currentThread().getId();6 A4 v" J/ V. i0 v( D4 K& t$ `! t
- print("Thread start:" + id); C5 y# K7 ^' `4 |* A4 P! P* O
- while (state.running) {
, [% n/ s% \8 f1 @1 T* V9 c0 @$ v' w - try {
0 ^; q& m9 d; J& x4 \ - k += (Date.now() - ti) / 1000 * 0.2;
7 ^2 P" S$ R2 R' M* H( s - ti = Date.now(); a- K3 e4 K5 m- f# K, K( m
- if (k > 1.5) {1 `, J. U. n% m
- k = 0;
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- setComp(g, 1);) t8 [- q9 @ u8 _6 b i& z$ s/ u+ w
- da(g);
% D7 F; N% |* d - let kk = smooth(1, k);//平滑切换透明度2 H; D& e' [ w( P. m, J( t
- setComp(g, kk);# f# ~8 ?) }" B4 L; e6 v3 f
- db(g);
. T% [7 h; [; W - t.upload();" |* r2 @! s/ y0 X
- ctx.setDebugInfo("rt" ,Date.now() - ti);
- K8 i4 A7 a# j. a - ctx.setDebugInfo("k", k);
- D D& v8 \" S4 ~2 Y - ctx.setDebugInfo("sm", kk);
9 h: c8 L }) S5 O - rt = Date.now() - ti;
9 e% l: T6 o4 ~# j8 U7 Q - Thread.sleep(ck(rt - 1000 / fps));, ^0 Y! A* ]% V5 g9 |. w
- ctx.setDebugInfo("error", 0)
6 n8 @! C6 _& y. [4 ]: c - } catch (e) {5 i' O R9 W2 [; \" j1 _' `
- ctx.setDebugInfo("error", e);
' T' v- X1 b0 Y% L% T - }
2 D, t: F" G- a X% D+ F - }
- B" P5 ^( [# q- c6 K( O2 U - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
2 X/ O. H9 O- u6 ~: M( C - th.start();: D+ ~$ |% u! n5 h
- }
/ y# @2 P0 w% } O. s3 u2 }
6 p+ q1 |( J+ o- function render(ctx, state, entity) {
3 L+ w1 { e% e9 |2 _0 P - state.f.tick();
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- - H! {+ J* E% P* a; X; v# ]
- function dispose(ctx, state, entity) {5 I0 _# V+ ]/ U4 n( E
- print("Dispose");* i8 w& Y7 R# U. y) o) |7 E% Q
- state.running = false;% B6 C1 A2 P Q" N* W
- state.f.close();
- X$ N A+ r q3 M - }
" U) @+ `1 T0 X8 f9 S - ! x+ [" F6 b" I8 i, H9 O7 A1 {/ g
- function setComp(g, value) {
1 i4 _( ~( m% _0 D. \2 s# s8 S - g.setComposite(AlphaComposite.SrcOver.derive(value));$ M( P' d6 e0 k% _/ E9 h# U3 y H
- }
复制代码
" F/ E6 v [8 M3 S2 c* L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。5 a+ t1 ?. U; f* ]* }: c
8 x$ q J/ a* h& S6 S, {
! n( L5 ~; D, f; q) x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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