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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。2 X: I8 d5 s; O' o/ Z {
- importPackage (java.lang);
! A# p+ ?: {) V' ~0 e2 w - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
* W3 ^$ W) k4 U, ^& w5 h
0 x* S& S. G7 z$ V$ b- function getW(str, font) {9 B9 P, Z% W2 h! K3 r9 _# H# W' Q
- let frc = Resources.getFontRenderContext();1 r4 T/ g6 K( X. }" y/ d
- bounds = font.getStringBounds(str, frc);, X2 I6 V! t) F' O) g1 w5 `+ x/ U7 D
- return Math.ceil(bounds.getWidth());& r8 F/ W) w4 S7 b6 m7 ~1 |9 T
- }
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- da = (g) => {//底图绘制
* V6 J A, k' L9 S, N - g.setColor(Color.BLACK);
: F! g! q- O" {: h# r4 h& R3 k% Y - g.fillRect(0, 0, 400, 400);
% F. g- k2 U4 f! `" U - }- h: }) o) b5 C0 I6 _& x- @& Z
. q5 ?7 b) M8 {: T- db = (g) => {//上层绘制
2 P+ W* \0 C. n' N/ I8 f. {! @1 Q - g.setColor(Color.WHITE);
# _. w. X- j9 _/ x4 Z: v( D - g.fillRect(0, 0, 400, 400);
! ?8 Y6 O s( }/ e2 m - g.setColor(Color.RED);
# y: I5 t+ M3 F3 Z$ p& X! B! V - g.setFont(font0);9 F6 }$ L( W0 C0 Z0 ~ d4 c
- let str = "晴纱是男娘";- Y- {: H" _; N2 E3 C: D* e
- let ww = 400;
\' ]6 ]3 Z8 z9 W5 ^* |, f- b - let w = getW(str, font0);
2 x3 \- K. F1 d% x ]7 { - g.drawString(str, ww / 2 - w / 2, 200);/ f% f7 w+ d3 X* Y% |! w
- }: E( o7 p( w) w7 t0 d2 R" _6 s3 ?
b; h2 n* O6 E+ i- const mat = new Matrices();. g) R, L ~* i0 q
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
) e3 j9 q4 o7 E( G9 g4 p8 V4 N - let info = {
' Y/ N, r& ]/ o/ [ ]5 I( [ - ctx: ctx,
1 p, l5 y* N- @8 K' T - isTrain: false,5 J. P0 ]4 c$ D
- matrices: [mat],9 }: x# a1 u; c/ I8 E! d
- texture: [400, 400],1 X2 h) `7 ^& A9 i# F$ X( W( l- I
- model: {; a1 C0 w0 I+ g7 M$ H; h) N2 }
- renderType: "light",8 Y7 m* s+ D' E" n) J& }% i
- size: [1, 1]," q0 r- d6 ?+ G- J
- uvSize: [1, 1]
, ^& w" k9 g) ^ - }
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- let f = new Face(info);
( g, ]. }+ O9 ^3 ~ - state.f = f;9 P/ G7 E% E- j4 r/ s3 [
: p$ w0 h1 Z4 [! G- let t = f.texture;
* W% t; P0 C7 M- n2 L j - let g = t.graphics;& R" H# F8 y) Q9 r% w, Y5 A0 s7 D
- state.running = true;2 e0 t+ n! s! ~, o
- let fps = 24;
; l8 ?; C8 u Y/ o& b5 t+ U' P6 w+ S - da(g);//绘制底图) b: G* [$ J7 c# j
- t.upload();6 n, a, _4 O' B6 \
- let k = 0;
6 t+ }: f% D2 J5 @+ r' T% F - let ti = Date.now();
2 P3 j# Q, A" ?' l/ j9 K - let rt = 0;1 G/ S* B4 V& C& i6 G" m( ~
- smooth = (k, v) => {// 平滑变化
* L" j7 `# I" L& }2 ^1 ]* M3 n - if (v > k) return k;: h: `& F9 Y# I# p4 m( n
- if (k < 0) return 0;* T: d p6 N3 y) L: x0 p
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
T' W" y* K5 @* S - }
4 F; g2 u* n2 [! E: s2 V$ ` - run = () => {// 新线程
$ O! G* M$ N( n5 ~2 l) m# L- j. r - let id = Thread.currentThread().getId();4 a5 L5 {0 d4 Q$ F
- print("Thread start:" + id);
/ h" a' q. \) I/ V1 @ - while (state.running) {: L) x w G$ L3 Y9 e+ `4 _$ V- d
- try {
& J( h; m J9 E" C9 v6 f1 ^ - k += (Date.now() - ti) / 1000 * 0.2;: G! {$ H5 [, I9 T+ w
- ti = Date.now();( w6 v8 a1 E. ]0 c9 C! R2 |& O3 Q
- if (k > 1.5) {
4 Z) N1 ^+ Y# @ - k = 0;' T2 z9 P2 Z0 F) ?7 A0 V
- }0 U n% |% X: {/ f
- setComp(g, 1);
1 u( S5 O$ D. J4 i - da(g);# Z2 {' U* x S
- let kk = smooth(1, k);//平滑切换透明度
9 U2 W- f& _5 [& P" q2 R - setComp(g, kk);
9 l% _' B# ~' Y- W* \ - db(g);0 P2 }0 F/ x! v7 i: Y
- t.upload();
5 \' n* S" _# U0 d4 w" d - ctx.setDebugInfo("rt" ,Date.now() - ti);
& H) @' s! w: s. A4 a - ctx.setDebugInfo("k", k);
3 C: G. E# _- X9 u - ctx.setDebugInfo("sm", kk);8 N- T+ U) C5 g
- rt = Date.now() - ti;- Z1 W9 j8 ?( Q( u1 r9 @) }
- Thread.sleep(ck(rt - 1000 / fps));0 }. j Q$ E6 x- q g) l7 t# w
- ctx.setDebugInfo("error", 0)+ V$ X8 f% x& J) [. O5 m
- } catch (e) {( l5 R) h5 l# Y- o. W3 y
- ctx.setDebugInfo("error", e);
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- }( y9 V/ [2 x. @2 Y1 i& S
- print("Thread end:" + id);' p6 a5 l3 o7 I( w0 \( S
- }
8 }9 B* W+ H9 X# Z' ` - let th = new Thread(run, "qiehuan");: I- S/ K- a4 T& @6 X1 b
- th.start();
7 |0 L- `( N0 ]/ H4 x7 a - }
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- function render(ctx, state, entity) {! A; m7 p; [5 ]8 x
- state.f.tick();0 L- n$ V$ y. k Z1 F3 k
- }
- H% y2 |/ S! c( s9 q
5 T! q* e5 T) d3 N* C& w+ C- function dispose(ctx, state, entity) {1 q9 y/ l. ~& P3 |5 x. O( A
- print("Dispose");. ~* F( m b: Z! k
- state.running = false;
! m6 ]0 h) a6 y3 E0 U! J - state.f.close();) c$ C: J+ ?0 t/ d9 y6 E
- }
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- function setComp(g, value) {
2 I! I; A9 P) S - g.setComposite(AlphaComposite.SrcOver.derive(value));( Y. y: X' O- f9 p" U$ r
- }
复制代码
! v3 S2 S! D& t* p, n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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