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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。
; R$ }- ~9 f {; U* L) F- i- importPackage (java.lang);# r2 \0 M2 C" c* ]- ]/ [" d+ T
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));8 V/ C: q+ P, c! p4 D( ~% |. e
- 2 f) \1 \1 T/ y L* w+ ~; A2 b
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
( |+ D/ W$ q; m7 }. y - let frc = Resources.getFontRenderContext();
8 e; f& z ?& p - bounds = font.getStringBounds(str, frc);0 Q: A @$ j7 l/ n3 ?! n- V
- return Math.ceil(bounds.getWidth());' w' s4 l6 m' P7 V/ J' [+ x
- }+ m: c g4 }2 c/ |* t. N3 R2 A
- 2 S' y0 a$ ?+ K& G+ ]; ^
- da = (g) => {//底图绘制& I/ N9 l& G" ~
- g.setColor(Color.BLACK);- m5 Z) r2 x. M" @2 M% Q' H' T
- g.fillRect(0, 0, 400, 400);" s: X7 a8 J# k, @7 W9 ] U2 n
- }
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- db = (g) => {//上层绘制
0 T, x- G; x+ y6 f, a - g.setColor(Color.WHITE);3 V. R2 ^; S8 ~
- g.fillRect(0, 0, 400, 400);2 w% \. l* n% Y& i ?
- g.setColor(Color.RED);% p: j. N6 D* a4 H; {
- g.setFont(font0);2 N* J8 O6 ?' v0 X; C
- let str = "晴纱是男娘";
/ s4 a( |3 z7 v/ W+ U - let ww = 400;
6 P- R/ H+ k: A* e, ]/ w3 X - let w = getW(str, font0);+ J# ^$ ?9 x5 R6 V) Q" T$ V- v
- g.drawString(str, ww / 2 - w / 2, 200);
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- ^# u8 X8 w2 { o- const mat = new Matrices();
# J0 |/ L8 v3 @, }% d - mat.translate(0, 0.5, 0);
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8 w1 _( w$ J) s/ m3 g5 ~- function create(ctx, state, entity) {
& {& _; \' P9 b1 b- Z8 \. n# a0 P C - let info = { ~6 v( P+ Q) O3 u2 B' k
- ctx: ctx,
7 X" ^: m4 Q" M5 g; i - isTrain: false,- E) Y' f L f2 B
- matrices: [mat],
! @6 x% Y& ~- ]$ M - texture: [400, 400],8 m$ i- S# o, n# [) z& i0 w
- model: {' ~) K2 c8 U0 T# y& O
- renderType: "light",2 E: n4 O( t$ b& \* X; \1 z' o
- size: [1, 1],
# b( F1 [+ v4 B8 T4 ]) G - uvSize: [1, 1]
% l6 c( u# }. [; H& ~- B5 V - }
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- let f = new Face(info);4 `& s$ ]/ h" g# x
- state.f = f;" l# |, @/ P/ o# N s7 [. U
' ~2 Q1 N& @ h$ B3 G% \0 x: e& e: g' Q( ?- let t = f.texture;
+ ]. x& I, Y# U/ U i& a1 v A8 i' v% O - let g = t.graphics;
' @+ T3 G2 Q( W) T - state.running = true;
9 e+ r" {! H8 c% I+ B. A8 ~ - let fps = 24;- F" B/ ?* x: z) Q
- da(g);//绘制底图
! W7 {% r# b; i7 |* q0 e4 Y- \ - t.upload();
" _; g' v6 m" G - let k = 0;2 _1 C: b5 D3 d& D3 F
- let ti = Date.now();
+ c& z2 |( [( T- H4 L - let rt = 0;* _% I s( H; m; n
- smooth = (k, v) => {// 平滑变化
8 U/ f' a4 d- J9 _& B F, f - if (v > k) return k;( F: c: X8 o5 z5 {0 z/ T: ]+ D. k
- if (k < 0) return 0;
4 \7 V% P3 N% D4 d: V - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 K6 G+ |! x' X8 q3 E# g
- }
$ p: C0 I+ t5 f7 X$ j0 E - run = () => {// 新线程
% A; r0 Z( l. X3 [! [ - let id = Thread.currentThread().getId();
* Z5 G, |) P% E - print("Thread start:" + id);
& [* S" E1 w l. D( J p# ? - while (state.running) {
) b/ P/ u) V2 [2 _8 s - try {0 {! I- b1 U) i9 e; h
- k += (Date.now() - ti) / 1000 * 0.2;
" |6 `! ]; E1 j* z* k - ti = Date.now();
8 E; G6 X& n' r+ {3 Y - if (k > 1.5) {
& q! z8 @0 Y6 d/ T0 s. @, A: m k - k = 0;
# X4 x7 }3 p9 ~7 e - }3 d9 P8 z, @1 O& C" {- z
- setComp(g, 1);% x2 r- B* ]6 A& b- E; [3 v" N
- da(g);7 `, {; s# k5 x, \6 e% o# i7 {
- let kk = smooth(1, k);//平滑切换透明度& p9 W2 b+ A( _6 Q8 t* r, y
- setComp(g, kk);
' G( \ l" M0 l( i0 t* _7 {- H7 O - db(g);
8 |& a% P* \1 h; Z2 T. f! k - t.upload();
5 Y# o& L6 d- o1 [0 M - ctx.setDebugInfo("rt" ,Date.now() - ti);
+ ]7 ?% d0 }( Y) i. t9 x - ctx.setDebugInfo("k", k);3 p0 e/ X7 x5 J: O+ {- a
- ctx.setDebugInfo("sm", kk);) Z" m( }0 K) u: B
- rt = Date.now() - ti;
( C. W6 s/ \* B `' H - Thread.sleep(ck(rt - 1000 / fps));7 c8 C: ]: \6 i2 A2 }1 W; l6 }/ I( Y& X
- ctx.setDebugInfo("error", 0) |: k! F$ F9 _7 z( n/ Q
- } catch (e) {+ m# B5 M6 M' m
- ctx.setDebugInfo("error", e);
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- }# Z [6 n9 m5 u- T9 w
- print("Thread end:" + id);
7 K# l% a) N. W( d/ ^ - }
, M0 H w) _3 H. b8 c" o9 X - let th = new Thread(run, "qiehuan");
& U, W: w5 }. S, V7 S9 w - th.start();$ v0 A" g5 D0 o8 c
- }3 B' a- {9 S% s8 p' E) I& L
1 N, }: Q/ ]7 M3 G- function render(ctx, state, entity) {
3 w* Y4 n; ^% O% M - state.f.tick();
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3 C# p% f, o0 d3 j- function dispose(ctx, state, entity) {
; g$ b- \* A6 Q; `" G5 w - print("Dispose");: o' Y1 h( l( y2 H% h
- state.running = false;1 \+ i1 ^+ u' F" J% a9 L
- state.f.close();
4 t) O9 P$ p7 V$ J - }
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- function setComp(g, value) {8 R1 U3 j5 [" I4 n, S$ P$ P
- g.setComposite(AlphaComposite.SrcOver.derive(value));: C ~/ i7 L1 ]0 s8 X/ q- R
- }
复制代码 : H' ]1 Q% ^5 f, \0 j4 M
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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; }1 ^% o3 M& x, p% p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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