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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。% `3 o& r; ~" }7 p
- importPackage (java.lang);1 b- Q' t, m* V3 |2 `
- importPackage (java.awt);
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) o& }( j7 e1 i" ^9 @: N Z- include(Resources.id("mtrsteamloco:library/code/face.js"));3 [' s3 Z1 f3 w' X" t
2 L4 e3 [% H& r* S' ^0 R6 v- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
5 T: ?8 Z- Q/ _: G v - let frc = Resources.getFontRenderContext();$ m2 _6 Z1 |+ c* ?5 a, ]; c4 A" p
- bounds = font.getStringBounds(str, frc);) R4 |: ]' X: ~/ c
- return Math.ceil(bounds.getWidth());
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- da = (g) => {//底图绘制& p$ h+ U Y z& t, \! ?. C
- g.setColor(Color.BLACK);
/ o k. m/ }& c5 \8 _ - g.fillRect(0, 0, 400, 400);) c9 [; I! J, s' C; q# H
- }3 }. S g! j5 ^/ i
1 Q* U& ]/ N' `6 X N5 F' ?/ Z- db = (g) => {//上层绘制
+ {2 C% m, R' Q2 l6 W7 |. a - g.setColor(Color.WHITE);
& y. d5 G! a8 C - g.fillRect(0, 0, 400, 400);, T& H& C" V/ E* C
- g.setColor(Color.RED);1 b- B _0 z$ B) X0 o3 K) g
- g.setFont(font0);' e0 p3 A% O6 b6 ]; V8 B; \) `1 g) x6 R
- let str = "晴纱是男娘";
5 B7 r/ V# A0 l" m - let ww = 400;
1 s- ~" e* X) L5 v - let w = getW(str, font0);. g8 j% x' H" @2 E1 \7 C
- g.drawString(str, ww / 2 - w / 2, 200);( H# Y' o/ A: c. V
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; Z: @! H- R! g) {! W8 C# d- const mat = new Matrices();
) I+ X8 B5 E9 f1 l/ c, g - mat.translate(0, 0.5, 0);9 C2 U. Y! f$ l1 b
- # ]& f; u/ o7 K$ t
- function create(ctx, state, entity) {
3 K4 i( d- Q4 M/ f$ I& _ - let info = {
# |& A7 s" F* J% y - ctx: ctx,, z0 Y0 {" m2 a8 |! O$ {
- isTrain: false,' D* r& f# w: Z4 l; X1 ]
- matrices: [mat],
* F: z1 W0 O7 }, n; i: A - texture: [400, 400],
7 H! A& L. M0 B* s; w - model: {3 {4 H) ^6 `& r7 }; l! ]: d
- renderType: "light",
# o8 [9 l6 o$ d; J: [ - size: [1, 1],0 z6 B: m% g' R6 r/ z! P/ L
- uvSize: [1, 1]$ V7 P4 G' r7 t5 k+ f: G
- }& A2 i7 g; |1 x; v) ^4 a
- }4 }& ]$ h; A" C8 c5 l* a9 i
- let f = new Face(info); c, r V1 o3 P
- state.f = f;
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- let t = f.texture;2 L( Q, k2 T! a6 e& W8 y/ |8 ]
- let g = t.graphics;
, {) {! }8 k9 j: U7 k - state.running = true;1 D, n. b2 L4 [6 J( m
- let fps = 24;2 i; ^2 k. F0 G0 a! C6 P% z: ~
- da(g);//绘制底图
8 H- x% k2 P a( M+ o. s6 b; i3 ^ - t.upload();
}: ]9 E7 F8 {; Z6 H - let k = 0;# N8 Y- q: H# p( |
- let ti = Date.now();# O! u8 p& v u3 T
- let rt = 0;! N. T6 o3 I) Z: n* ^6 U
- smooth = (k, v) => {// 平滑变化8 O/ K2 `) I6 [: q# N' D
- if (v > k) return k;3 h# ~$ w; U1 [
- if (k < 0) return 0;0 {. m( ^& U7 |! G7 H! K7 r4 W
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* V( ^; v! U4 b$ |7 p# e - }- h; s" v% P/ {+ ] \
- run = () => {// 新线程. t ?2 p* v5 n( r- v
- let id = Thread.currentThread().getId();# L9 K+ t6 D/ v& B
- print("Thread start:" + id);
* G5 N9 O- l' [* F* J: J - while (state.running) {
1 X. l, _! e; l0 |, [' H - try {
% z2 d& w6 t8 E! V- h" V! @ - k += (Date.now() - ti) / 1000 * 0.2;
4 ^( ^' Z7 {' W1 Q9 a+ Z0 k - ti = Date.now();# E) Q* g. p7 n$ `' |
- if (k > 1.5) {4 j* @( r8 J# R# K0 E* O2 a
- k = 0;
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+ A, q& C: y# _. h) a - setComp(g, 1);
) q! E9 p9 t0 N8 H/ ]) O - da(g);0 ?# R8 N" O0 i3 f, B7 Q) B
- let kk = smooth(1, k);//平滑切换透明度
3 E* e0 ~6 O, i# b+ ~8 f# G - setComp(g, kk);
7 J8 Y$ @; a4 U6 C - db(g);
3 H5 c3 D, ~: U4 c* J" F; H - t.upload();
- ]9 k. x* W, a9 R! R, p - ctx.setDebugInfo("rt" ,Date.now() - ti);% W7 \" E+ V$ F4 T( u; t
- ctx.setDebugInfo("k", k);% L& a# f: |2 H q: D/ k/ `; e
- ctx.setDebugInfo("sm", kk);
% Y. {4 }/ P( u1 q - rt = Date.now() - ti;, V/ k I% Z3 | e7 j
- Thread.sleep(ck(rt - 1000 / fps));
0 c& ?2 ^) t% }+ Q( Q - ctx.setDebugInfo("error", 0)
( P2 z! I' P) @8 { - } catch (e) {+ i) Z7 r; A- I- m
- ctx.setDebugInfo("error", e);
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- } r4 }2 w- S( I1 s/ ?/ C4 p2 _
- print("Thread end:" + id);5 [; ~. K9 @$ X8 {
- }
! {7 Q* \5 P+ Q' o - let th = new Thread(run, "qiehuan");2 e8 N/ i" L6 W; V
- th.start();0 A" r1 m& S" y
- }
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- function render(ctx, state, entity) {
: y$ R j- G, w! h z. ?0 U a - state.f.tick();
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v8 N. X9 P, F( }' Z$ L" x1 T- function dispose(ctx, state, entity) {
' {' F! o5 F* ~3 c" T - print("Dispose");
+ ~7 T# i% R' n0 p - state.running = false;0 r# r0 U4 B; U7 X
- state.f.close();
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4 \3 B! O. S* J5 F; Y- function setComp(g, value) {$ n, D! R" l8 Z9 u/ n8 y! e! @2 B
- g.setComposite(AlphaComposite.SrcOver.derive(value));
4 z& _8 A1 @2 ^9 k4 R# g& y - }
复制代码 & M4 Q }# @3 i6 o
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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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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