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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。9 f( {. m0 B1 U; b/ q" R
- importPackage (java.lang);. R9 X0 \) q- M; ?/ @ U
- importPackage (java.awt);
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4 N; d6 B5 K7 f6 S# M- include(Resources.id("mtrsteamloco:library/code/face.js"));! j$ n* a. { H
- - B) z0 _+ w, R0 A
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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. {, R& c& k8 R0 S6 b- function getW(str, font) {
M; m+ U) c; `- Z( u- X - let frc = Resources.getFontRenderContext();
* I& Q; M6 t. Y - bounds = font.getStringBounds(str, frc);
4 ~" I0 N; x V. |5 U3 u - return Math.ceil(bounds.getWidth());
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- 2 _" y. |& r5 d# h
- da = (g) => {//底图绘制
- ^# ~0 L3 p% X" v - g.setColor(Color.BLACK);' @3 e2 E( p7 z F
- g.fillRect(0, 0, 400, 400);, N6 W( t; v$ x$ `: _: |
- }
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: S- R8 F7 Q( u/ U- db = (g) => {//上层绘制
4 I( v0 e/ o' p: B- T" h) w - g.setColor(Color.WHITE);/ C$ g& {+ C2 i# i
- g.fillRect(0, 0, 400, 400);
- L" r$ z8 {6 b) l& F9 n1 f: f9 [ - g.setColor(Color.RED);! l* G! }7 R7 t' U- G {
- g.setFont(font0);
( p9 F3 B6 ~4 P h) j) a - let str = "晴纱是男娘";' U6 A2 w4 S, c- a- ` d
- let ww = 400;
' g" e) `; G' h3 \) R - let w = getW(str, font0);- R, ~ L1 u# _
- g.drawString(str, ww / 2 - w / 2, 200);6 l; F; n6 T1 m: m4 m
- }
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- const mat = new Matrices();2 F9 c" N4 p+ g; R1 f4 ]3 \
- mat.translate(0, 0.5, 0);+ ~( D+ H5 M9 n3 ~# t9 X6 U1 y
7 o& i5 X1 Z% B. j% o" @- function create(ctx, state, entity) {& L; J; ?; K9 J9 e# ?5 E _
- let info = {
& e. K& Z" }/ E0 n7 y - ctx: ctx,
* I: e: H8 k: W: b - isTrain: false,* g9 o- ?. u, s- G ?
- matrices: [mat],1 k+ w4 u, F! e% B
- texture: [400, 400],
1 z# M" G& N+ e9 s X - model: {
: d9 Z: x( t: o9 l - renderType: "light",
5 J$ h' q: z: Y4 a* q0 l - size: [1, 1],
( b+ \% n; x g) |; e$ Y - uvSize: [1, 1]
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- }! J& R* j7 M# i* G4 m/ q- ^
- let f = new Face(info);
, K x9 y2 T, V; c0 o$ S0 Y - state.f = f;; t$ z! i" }* c
- 6 G' B9 ?8 U, Y% w( F9 M2 ~
- let t = f.texture;
2 b! F: M+ U; D2 J/ a - let g = t.graphics;
8 y1 ?* O, ]/ C" P - state.running = true;6 h* \, q. R- S1 q8 g5 o' q
- let fps = 24;
( R+ o7 ?2 a0 Y5 a - da(g);//绘制底图1 b5 V0 k( {# Z
- t.upload();
! |: ~3 W8 Q3 S8 X/ W" q9 n - let k = 0;
1 I8 A# F5 c* F6 b! N - let ti = Date.now();1 x1 a+ a" |- q/ J2 Z
- let rt = 0;" z6 b1 c6 ~& _3 z
- smooth = (k, v) => {// 平滑变化3 c% t' ~' l6 A$ S) b
- if (v > k) return k;/ _0 T6 T( T7 e" k' m
- if (k < 0) return 0;
* Q+ i9 I, q; }6 |# _8 \$ ^ n. L - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
" Z5 c0 z- a2 G1 m - }
. b' K/ _% L) i! `3 q+ f3 s - run = () => {// 新线程
' ~7 z- X" |; I0 Q3 s4 ]; y - let id = Thread.currentThread().getId();) X4 r# w2 B. U
- print("Thread start:" + id);
, m/ O0 ?: O3 _ - while (state.running) {( H& j# R# z% V$ F% x- I- `
- try {% I3 o# n6 r' X+ Z. e7 ]( K
- k += (Date.now() - ti) / 1000 * 0.2;
2 Q# v3 R0 Q4 o* V6 U, G2 l - ti = Date.now();
% Q- W2 \9 R {' ? - if (k > 1.5) {
8 o5 {/ X# X1 s& T - k = 0;" Y* o! c' Y$ h- b& S% r6 `4 b
- }
- W0 U* Z& G3 R+ B - setComp(g, 1);
- D- \3 ]# N4 s4 @ - da(g);
: _ ]: @$ B; @8 x - let kk = smooth(1, k);//平滑切换透明度. ]" m5 w0 `7 N, {
- setComp(g, kk);
8 q* M3 ]* y' X- O+ @8 g - db(g);
: |3 B) E" C* I# T - t.upload();
) Y7 {2 j, P3 s - ctx.setDebugInfo("rt" ,Date.now() - ti);/ z8 S/ ~% t) ]- g, y# e8 |: R4 r" g" c
- ctx.setDebugInfo("k", k);, d7 I8 A* V" Y7 O
- ctx.setDebugInfo("sm", kk);
y9 k8 A9 O$ t f I( F! C - rt = Date.now() - ti;( L* o" Y" a. S {+ }* N4 J
- Thread.sleep(ck(rt - 1000 / fps));- L( Q. D% e" d) ?1 G% y
- ctx.setDebugInfo("error", 0)1 P0 l! x* T; a2 Z& m" s
- } catch (e) {: q& I; K1 b5 s! M0 |; K7 K1 U
- ctx.setDebugInfo("error", e);8 y" y9 @$ \% e5 B0 Z7 ]3 w, ^. H# M
- }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
5 p. B. O# Q8 S' R - th.start();
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4 V Y: {/ R7 Q# q- function render(ctx, state, entity) {( I. E3 D% S' P1 Z
- state.f.tick();/ z! F9 A, E. k
- }
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2 O- d9 ?! g0 f! ?6 V/ ~- function dispose(ctx, state, entity) {& F7 M' d) n! o& F
- print("Dispose");
2 v* k4 l# e, z) A0 g, g& Z3 V - state.running = false;
6 z( n8 N9 D% P, ` - state.f.close();
! z5 N- Y& y5 k/ [. x+ k0 x - }
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- function setComp(g, value) {! j, v/ \+ n8 ^9 I( M
- g.setComposite(AlphaComposite.SrcOver.derive(value));* ]2 A0 b' Q& q3 U
- }
复制代码
2 @, O2 w$ u7 v/ ]) E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。 U4 u* l. _; I) r8 x6 \' m
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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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