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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。
7 L8 @+ j4 {, K% W8 s0 l5 r$ T- importPackage (java.lang);/ \9 j% I. x- W: [/ F
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));/ J% J: y/ h6 o9 \' ~
- 4 w n' Y: [( P0 k# {& K1 I$ D
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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9 m1 m! |' m) c- function getW(str, font) {
7 W% t; s" a6 s- @6 L" ^; `4 R - let frc = Resources.getFontRenderContext();
2 }) c+ i( K! h5 s* W' i+ t4 a - bounds = font.getStringBounds(str, frc);
$ N4 j1 I. h8 h0 m" ~$ L. j - return Math.ceil(bounds.getWidth());, f3 S: w1 f9 t; S% M
- }/ m! U; I9 q* f6 Y
- 9 [7 p w T: V" I) X3 {1 x
- da = (g) => {//底图绘制8 d9 X4 A# c( Q) V v
- g.setColor(Color.BLACK);' ^% p9 u" [3 [! @" }
- g.fillRect(0, 0, 400, 400);$ H6 ~$ z& ], g. V
- }
- u5 O1 X9 u0 v; \) m1 S* I- F, p1 Q - ; l, a0 c# }8 k, L& ~6 M8 a% h
- db = (g) => {//上层绘制
7 K' ?" A; {3 `8 ~" d5 G |1 g* g3 _ - g.setColor(Color.WHITE);- B/ T! ] b! O* y
- g.fillRect(0, 0, 400, 400);, g) c" o$ [2 [9 g
- g.setColor(Color.RED);
* J# z0 N d! V" z' l - g.setFont(font0);
. o3 t: Y5 B9 Z% }* I% L - let str = "晴纱是男娘";
. G( ?2 s$ l; j) Z6 @ - let ww = 400;
; B* W% c$ ] q$ V! M3 c6 W' J - let w = getW(str, font0);
5 k) J7 X; P1 ]5 U - g.drawString(str, ww / 2 - w / 2, 200);3 N$ Q- |: U( l
- }
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) B3 O" b* a& ]/ E! S% K* p- const mat = new Matrices();
9 r( E1 r: |! j2 W, x - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {8 l% O& I6 ~% y- q( s4 v
- let info = {
! d! x+ ?* r, _' p- t - ctx: ctx,. B- I. Q% Q% x
- isTrain: false,# W, G* F6 V7 d: N- ]5 }1 b, H
- matrices: [mat]," |6 A1 b! [/ [& T6 U- R
- texture: [400, 400],3 X1 _2 G, c4 R( }+ j$ o% \8 d- O
- model: {: s. x# j. L7 u
- renderType: "light",
9 A+ z9 h! z8 M, g$ b. U+ H7 e - size: [1, 1],
- ?) p5 a, z, {1 A0 ` - uvSize: [1, 1]
: W; C8 S! c6 a7 b" Z8 e - }
6 G6 o: t( k5 {1 c - }
6 H) F4 I! ~: b' v - let f = new Face(info);* O& m' t4 l& V2 x8 n% H" E1 z7 W
- state.f = f;- n% W8 }3 |# F
1 ~. i% m4 W$ {1 G8 {- let t = f.texture;$ W5 |/ K) T) k
- let g = t.graphics;
, A0 E' p9 N$ \( l; ` - state.running = true;
/ X& U( p6 q4 Y! Y5 o9 m( O( C - let fps = 24;' L. }5 x: W: ~) `
- da(g);//绘制底图' k5 e$ s$ x$ I# J# I1 _* Q
- t.upload();
: T3 H( q6 `# L/ H- @ - let k = 0;- ~6 t7 k, T9 z/ P3 i
- let ti = Date.now();$ D, B. n+ o& n/ K/ M( F
- let rt = 0;
/ s# C7 G/ s; V J# O2 r5 j( Z - smooth = (k, v) => {// 平滑变化4 k3 M8 U4 S- d s+ z
- if (v > k) return k;
7 Y: p3 l* U( ?2 M9 y( \ K q4 Q, f - if (k < 0) return 0;+ a4 {1 h1 ]0 l+ j5 h N: ]% S5 d3 d: @
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
L$ b6 F6 _# f- a" U* h - }
* u5 g: {1 j. u0 `8 d" O9 d( ^ - run = () => {// 新线程
: p! b2 \ d3 S0 A$ X - let id = Thread.currentThread().getId();
; s4 i; s- z8 k4 e9 [/ ` - print("Thread start:" + id);
: `* t& V; L' N2 K* d; N+ X$ j& T - while (state.running) {
6 `* H/ `' ]2 A% N. D* V - try {
1 k: L, x" d: Z" b8 U - k += (Date.now() - ti) / 1000 * 0.2;
2 N9 F& e2 f3 _; l: g - ti = Date.now();6 w( I) ^3 H$ f* b" c, |
- if (k > 1.5) {
! A5 \' g$ @, ?) R. I$ b - k = 0;
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- setComp(g, 1);
" x" i( Q. p- F2 r+ d5 @ - da(g);
( L2 F, z8 ?3 c! e! a' T1 r; ] - let kk = smooth(1, k);//平滑切换透明度' \5 J) s; t& I: S( i
- setComp(g, kk);5 b) v4 F, S( E1 p
- db(g);
% N5 i% Z2 f% T; `7 ^ F# z' `" _ - t.upload();
3 X) B1 d/ K' `4 \7 a1 Y - ctx.setDebugInfo("rt" ,Date.now() - ti);
0 l( T5 H! r2 i( |8 M - ctx.setDebugInfo("k", k);
) h7 Y9 }" z; o2 X5 Q% M; `. c; _ - ctx.setDebugInfo("sm", kk);
' \6 x/ H* M) ?1 u! _ - rt = Date.now() - ti;; n e8 Q5 @+ ?: m/ X0 Y
- Thread.sleep(ck(rt - 1000 / fps));
0 m7 [0 A5 l t9 v - ctx.setDebugInfo("error", 0)
) Y1 e6 _4 Q1 n% N( o9 g - } catch (e) {+ F( \* D! C" ~, d8 g$ x7 x' b6 n
- ctx.setDebugInfo("error", e);3 F8 t- o: ?) Q/ f* F" l
- }
8 K) `' p1 h" e2 U0 l - }
0 t0 W1 Y1 L9 N - print("Thread end:" + id);' k% Z6 {1 v1 u4 `6 `5 b/ r5 V7 x
- }* ^1 t/ K" G0 e) S0 t" s
- let th = new Thread(run, "qiehuan");& N$ V9 g0 M7 a
- th.start();
4 k8 X7 z7 G) P) x5 B. T - }) g* \3 P9 }, L* x( x
5 ~0 k; B- K) g& {- function render(ctx, state, entity) {. ]7 n- i4 ]4 v" R4 g
- state.f.tick();( e/ T+ f: D2 N8 ]9 S
- }+ r$ w+ b# \1 K) E
- 8 c( r: _2 `2 g! `/ K% _! H
- function dispose(ctx, state, entity) {+ h* Y4 M1 r- j) i# A* S7 C
- print("Dispose");& r7 v% E& Q9 W% O! Y- l4 f: O/ N: j
- state.running = false;- ^8 a8 k8 ^ Q, I: E1 G& x+ W
- state.f.close();3 w# D- r6 g; q8 @2 d/ R
- }
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- function setComp(g, value) {1 ]9 ] N' P' X5 F9 [+ n8 ^% K
- g.setComposite(AlphaComposite.SrcOver.derive(value));5 h2 N& o4 o* [ {
- }
复制代码 % e+ x" o5 y: ^% Y3 f
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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- c6 h) U: s6 J& m9 [+ n! 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)
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