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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。+ u+ s* V5 [2 _4 i5 V( ~; _3 _
- importPackage (java.lang); i, `; t3 D: i- B
- importPackage (java.awt);9 e( ?: `3 d8 `: U- l
9 N$ r8 R' r6 _, r) A) g5 H- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
- ?$ P9 ~, z5 x" e/ \ - " D' ^: w3 _+ _4 E
- function getW(str, font) {
x, t2 C$ L g1 c3 g2 H - let frc = Resources.getFontRenderContext();" i4 t- S" i) E
- bounds = font.getStringBounds(str, frc);
2 u9 g7 {; |: ?! d. _1 s* L - return Math.ceil(bounds.getWidth());
# G4 ?! ?, P+ E- r7 l/ G: T* h - }
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- da = (g) => {//底图绘制' s2 y" k1 s- ]+ U
- g.setColor(Color.BLACK);# r) Z1 s/ _7 G- F% o
- g.fillRect(0, 0, 400, 400);
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- 1 \. i- B( B- v, F6 v. @! f! D( q
- db = (g) => {//上层绘制4 ~, p* f$ ^. H: e) v! X, X
- g.setColor(Color.WHITE);
5 g% h. U/ Y, x5 y- ?4 ~ - g.fillRect(0, 0, 400, 400);
4 e% `# i0 Z3 V9 r - g.setColor(Color.RED);2 ~" U/ N; b9 }9 ?4 `/ ~+ P, ?4 H; o; ^' C
- g.setFont(font0);' Q {! p' l+ i2 d5 L
- let str = "晴纱是男娘";+ h+ D K: C; Y6 n/ W& f
- let ww = 400;
/ k7 M/ |3 |# k: ^! M* P - let w = getW(str, font0);
4 ^# a9 ~+ p" q {9 [. n2 n - g.drawString(str, ww / 2 - w / 2, 200);
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- 6 ?( F" t! o+ Q5 b3 J) F
- const mat = new Matrices();9 ?6 c7 i5 H+ d- j1 {, m$ t
- mat.translate(0, 0.5, 0);( l8 L9 k. s0 Y! q
- * O0 Y9 _/ y9 J) \0 p# P
- function create(ctx, state, entity) {
& f5 [6 |% M- s - let info = {- g$ E* |& w1 P" j/ p
- ctx: ctx,) A: z) y6 s6 [ |# k
- isTrain: false,
% g7 e' X0 _" e' o2 D. Q( ^; x8 u - matrices: [mat],
$ b6 D5 a, |# n - texture: [400, 400],
; H, k5 J5 x' v5 C5 V) w$ G5 o) { - model: { @: |& |5 N% [, H+ D& b+ I
- renderType: "light",% ]% l7 M+ E7 c5 S- d
- size: [1, 1],! o" x- U% N {, G% F9 n
- uvSize: [1, 1]
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- }
' G: K+ L" C& l; t8 o8 i1 w) p - let f = new Face(info);
# K, f+ K5 P7 |/ C2 Q" S - state.f = f;! B+ i' `, G/ G; E/ b- Z
- d5 G6 }, @2 `
- let t = f.texture;
$ H! O- @, \8 |; G) G - let g = t.graphics;
6 t3 ]5 X# z9 D! F C - state.running = true;) ]3 i7 | H6 g3 y( y
- let fps = 24;" I; M+ f# V. B: |
- da(g);//绘制底图
" t. q" Q2 k% V& ?" ?1 @+ Z) N4 b - t.upload();
6 L* N7 K4 \1 ~, O2 ] - let k = 0;
0 t- c! V! g, @3 g7 Q - let ti = Date.now(); ^: F* `! O- l* P9 F
- let rt = 0;/ w0 Z2 J5 T1 C
- smooth = (k, v) => {// 平滑变化
0 }( \- b% @( ~, h' Q% b - if (v > k) return k;! t% F5 A5 Q+ q4 a$ v5 H* I, w+ u
- if (k < 0) return 0;
' | D# `+ ^ e - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;1 l2 R- F. t' q) F% \* |+ y
- }: A* {, A7 u* o1 C( L
- run = () => {// 新线程
7 m) s: N/ j% D+ g/ `7 C2 q - let id = Thread.currentThread().getId();
& E) e& [8 ]: c n/ P - print("Thread start:" + id);1 Y2 @3 c, u* C5 V
- while (state.running) {
: _4 h B9 Y) Y7 i3 j: B& m - try {/ ]8 ~' y$ @3 V. i4 @0 [
- k += (Date.now() - ti) / 1000 * 0.2;9 H9 R' B2 I5 q! ]- w9 S4 p
- ti = Date.now();4 S' [( s F" }# O# ?( ]) `
- if (k > 1.5) {' T/ L* {1 J8 H4 E/ l& ]6 ^9 T
- k = 0;
+ V9 c7 ?! u5 [* b* ? @! { - }
9 ]$ T& Q% m$ s: m) t* R" ?7 U( E - setComp(g, 1);
! E0 i* G" E+ n5 P) a - da(g); R& C3 N, ^: G8 H
- let kk = smooth(1, k);//平滑切换透明度) z- h' i3 [; h
- setComp(g, kk);
6 N; {& e* J+ R/ x- q' C - db(g);4 C8 V& N% `1 C
- t.upload();
2 F- |" |/ }0 @ - ctx.setDebugInfo("rt" ,Date.now() - ti);
" n- S; R+ Z t2 l" z - ctx.setDebugInfo("k", k);
/ v8 |' Z0 S9 u5 D% d - ctx.setDebugInfo("sm", kk);+ ~" @* R, x5 o& D: u
- rt = Date.now() - ti;
8 J4 M% J% W5 u - Thread.sleep(ck(rt - 1000 / fps));4 R* k3 y% r* }& `6 r6 K
- ctx.setDebugInfo("error", 0)* R* x: P8 @* O) C I
- } catch (e) { O/ J- h; N g5 G' x; `! u, e8 I( S
- ctx.setDebugInfo("error", e);; z- c. E, b0 W. F7 r4 e
- }
) i% @3 q, _) h% m8 Y0 } - }
# r& f+ }0 j) `: w! j - print("Thread end:" + id);; u8 D5 m$ o8 e, |+ a0 i8 w
- }
j: L3 F' X( b7 C. d+ [" c0 D - let th = new Thread(run, "qiehuan");/ H( ]! Q% l' D! U) }3 Y' h
- th.start();1 M5 Y# }% B6 B( h
- }7 j+ ^7 y! T+ X6 H
- ' d' J0 x( G( R( S
- function render(ctx, state, entity) {8 a% Q/ A7 G7 t3 S
- state.f.tick();
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- 4 l4 Q% x Z4 w& h; ^1 g
- function dispose(ctx, state, entity) {7 X$ `* g: k5 \5 F- e/ B" c% r
- print("Dispose");, G3 e1 t" D0 q. `2 B! ], q$ Q
- state.running = false;
% x! C- e; Z: A! y6 d - state.f.close();
" A4 i/ P7 h) |/ X+ d - }
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' p% S+ C2 c: F4 f3 ^- function setComp(g, value) {
- G) F8 j9 l& Q9 W* q8 { - g.setComposite(AlphaComposite.SrcOver.derive(value));
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复制代码
" u) F' Z$ W5 a: ]! a# j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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