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6 z+ D# g8 r! a8 b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 I1 [5 C! k$ W0 r7 v. n: V- importPackage (java.lang);
+ v' A- M! u* K9 W - importPackage (java.awt);) u9 a2 S$ m$ L/ z& v
- , L2 s. X* @6 u8 L$ L: z" k" O
- include(Resources.id("mtrsteamloco:library/code/face.js"));3 k( U l9 m1 d4 ^2 M. y7 |& O
- . O$ v8 f/ T0 f+ y* W
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
) k7 p0 H6 A# L: _9 I( k, B& F
2 U) p0 [% f" o" ? a- function getW(str, font) {% V6 }/ n4 l2 F7 |
- let frc = Resources.getFontRenderContext();
% R! w( H/ e# y3 R - bounds = font.getStringBounds(str, frc);9 H j, W: c7 g7 v. e
- return Math.ceil(bounds.getWidth());
4 B8 |+ R8 E) P% A$ @" Z) E - }% Z v1 v2 d' G/ [4 ^
$ ^8 A5 V! b1 J( |- da = (g) => {//底图绘制
* ? @' K; U1 v- F+ W% D5 D: t - g.setColor(Color.BLACK);
% z8 A$ A) m6 G' j8 w - g.fillRect(0, 0, 400, 400);2 g9 x/ l/ e: {5 N
- }
0 V+ E1 C8 d0 \1 @ - , G$ d* y& Q8 E1 i
- db = (g) => {//上层绘制, g( k* t! v) [! M4 ^! T9 F j2 D
- g.setColor(Color.WHITE);
3 H5 w9 T7 i- J3 u2 q% ~ - g.fillRect(0, 0, 400, 400);
* i- ]) s6 T+ Y' p2 v - g.setColor(Color.RED);
' E9 P k3 r* t# f& u2 s" f - g.setFont(font0);# I6 l& P2 n% A6 T* `
- let str = "晴纱是男娘";
) u) d" o3 p0 K6 Q7 @; B, p- U$ u - let ww = 400;
" [6 `8 c! ~0 T7 F - let w = getW(str, font0);
# U$ {! p5 U5 R+ ^ - g.drawString(str, ww / 2 - w / 2, 200);
$ | g: }7 f- `* F5 K - }
J1 c! R$ q, F$ ?1 }7 T - - R: Y* g. A6 ]# C
- const mat = new Matrices();0 I" u. e$ ^. r. o
- mat.translate(0, 0.5, 0);
4 Q8 K- I$ F8 v$ `( I
3 [7 y+ i9 @* c! Q9 m5 f- function create(ctx, state, entity) {
8 Y! u; \9 ]$ m' Y# i4 M - let info = {
2 S9 P: c: w& ~3 M- n. X% \ - ctx: ctx,/ V6 v0 z& ]$ _8 j8 D4 x* h
- isTrain: false,2 C/ N' H& L+ l7 K- O) F* z. p, x3 t' R
- matrices: [mat],
0 R) z6 U* d3 a( S* J7 b - texture: [400, 400], M4 M! r8 f) ~# n
- model: {
) V. {1 a8 H& c - renderType: "light",: Q5 x, m% j7 W7 L
- size: [1, 1],
, p& l5 H/ f/ o" q% d - uvSize: [1, 1]
4 a( e9 H7 i; D - }, r, z4 h+ |, T! u4 ?& `8 V
- }0 N' X( k- V1 q! p" k# E2 X
- let f = new Face(info);
3 Q: |5 }' M, @3 C9 L8 l - state.f = f;
3 c: r- @( l9 i
7 ^$ S+ U2 M, C* z- let t = f.texture;
% `# N5 Q) x' G$ ~- P - let g = t.graphics;* a$ v& o6 l+ ^ C/ c% M
- state.running = true;# E7 |& z6 e$ Y- h" C+ j. l% a
- let fps = 24;
3 e; I) g c$ v% N: ~; R - da(g);//绘制底图+ @' W& k b3 ?. M/ M0 u
- t.upload();
6 Z- C0 n w% G/ r8 p - let k = 0;
. L3 n/ o# s, T3 a- ?* I V3 M - let ti = Date.now();$ c" Z* p# }4 T7 K& L" L! q3 G" b
- let rt = 0;* \# l5 l+ ?/ A8 H j/ B/ a2 x' s
- smooth = (k, v) => {// 平滑变化$ L' ~0 ^9 x) M3 g; Z; \+ n/ E6 S
- if (v > k) return k;
& J# U$ C* v% K/ F. N1 I - if (k < 0) return 0;7 M8 A$ U! Q( c1 ]
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
M5 R9 g$ g) [2 p - }
$ U0 Y! L$ G& M6 e r$ K7 B6 y4 _ - run = () => {// 新线程* X5 h$ v7 d9 N1 v) i$ n
- let id = Thread.currentThread().getId();1 S# x! y+ @' }4 |% R8 M3 S
- print("Thread start:" + id);
* _ F, I+ H/ i7 F - while (state.running) {3 d2 X/ D7 {8 j
- try {% c7 S7 R6 \9 w4 @
- k += (Date.now() - ti) / 1000 * 0.2;* x7 K$ T4 Q9 ?8 H- l
- ti = Date.now();* n. F2 Z7 C. u& {, U0 @' Y9 v
- if (k > 1.5) {
' x- g4 J9 U) |0 v9 t1 C$ J - k = 0;
7 g, t1 \# ?! a- @9 Q* s. r - }
+ U4 M/ V+ x6 j/ M - setComp(g, 1);/ \: z3 h& c0 ?
- da(g);* @8 _9 S* h) b+ H9 g; J
- let kk = smooth(1, k);//平滑切换透明度
( h( ~+ B0 `$ x6 r, X0 u# \9 l1 C# K - setComp(g, kk);% {( I2 @% `+ Z+ d! J% H7 `
- db(g);# u) q5 ^0 k- S. G1 S
- t.upload();1 \* m l. f G. t" N
- ctx.setDebugInfo("rt" ,Date.now() - ti);2 {- Y% D' Z) l: O2 w" t5 u9 F
- ctx.setDebugInfo("k", k);
, `; B! `2 \* J, j - ctx.setDebugInfo("sm", kk);
! a, e* ]$ I/ [/ t$ _$ b - rt = Date.now() - ti;# [; A. n# `% M; G% V% ~
- Thread.sleep(ck(rt - 1000 / fps));
% ], w* ?$ Y8 v) | - ctx.setDebugInfo("error", 0)5 t+ q# s" c- X1 H
- } catch (e) {# k1 G' e) v: `9 A& W% c; }
- ctx.setDebugInfo("error", e);. n4 N4 Q3 L/ A/ `
- }
& y% k1 I$ v+ Q& Z8 M( Y+ n) F - }
6 S* U3 w7 @/ r - print("Thread end:" + id);4 x! D+ o: J; d: a9 s
- } |0 O, X7 l5 E* q3 X/ J
- let th = new Thread(run, "qiehuan");
& w- h$ E G ^ - th.start();& k; K/ R1 \7 }
- }
* Y7 S/ e: k1 h( f4 U4 Q, F! [ - ( y# C0 b6 y: u0 Z
- function render(ctx, state, entity) {
' ^9 S4 z& t/ m4 [6 C. ~ - state.f.tick();
2 x5 X, s' D) _5 \' F% j8 A - }1 E( r9 t3 e# ? Z$ E7 B
- ) l* j& g0 u1 y1 R& F* W
- function dispose(ctx, state, entity) {
( h) H$ n& d& X0 ?& {0 ^ - print("Dispose");% X$ d4 O2 N7 N9 h# K' {/ k
- state.running = false;
6 s9 e v1 [ n - state.f.close();
* Y" F8 i: Q/ `0 x: m% g - }
9 [' |: s# r0 w1 C+ J8 O
6 D4 E8 g8 A. h% T6 Y- function setComp(g, value) {- L. t/ w' V7 g
- g.setComposite(AlphaComposite.SrcOver.derive(value));+ o' i1 z4 Y6 ^2 O
- }
复制代码
7 R) x, R; f) \6 j( X( s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。* o3 W8 X! ~! l
& m( C0 X, {0 }. h3 f0 C" A7 F
, q5 a; W4 B# x' \: U# Y* m/ h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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