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9 a x7 a% Z5 @% F3 H! L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 z6 T' D0 s# ^; j( M6 p, [
- importPackage (java.lang);
- D- N! O+ T. l/ y) z' @, @6 Q - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
1 X8 f Y1 J. e# E7 {
2 o% ?" G2 b3 a: O8 F9 x6 ^, b: @, Y- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
0 T' @2 c- |* ]2 _ - let frc = Resources.getFontRenderContext();: }4 o! k2 O1 V0 ?0 o
- bounds = font.getStringBounds(str, frc);6 W; Q0 @" v9 y0 Y
- return Math.ceil(bounds.getWidth());6 Q, g% Q; J3 d2 t. I
- }9 f2 J5 F4 I7 ]$ f
. u; V5 p7 L( U- da = (g) => {//底图绘制 k9 l# F! s0 x! z- }' d) q* S* @
- g.setColor(Color.BLACK);
, x9 A- z1 L4 m% k3 ]4 o8 O - g.fillRect(0, 0, 400, 400);
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- # Y2 O r/ D9 J5 v
- db = (g) => {//上层绘制
0 s* _' i- Q0 D. H" S/ ~1 w& v8 V - g.setColor(Color.WHITE);' K4 @% [+ T4 K( z0 u* D) ?
- g.fillRect(0, 0, 400, 400);
: u- y. Z$ D3 X- R! W- G6 S - g.setColor(Color.RED);
. ~5 i9 j7 K, a# u% A, |, B - g.setFont(font0);
3 q2 R8 u/ g2 c7 _; b - let str = "晴纱是男娘";
1 n& b: o; U! _3 |; I+ | - let ww = 400;/ I: r: [ c3 r: Q/ v8 Y$ B: C
- let w = getW(str, font0);) ]+ u) T7 h0 ~# [' X% J3 x
- g.drawString(str, ww / 2 - w / 2, 200);
" G- J: b: o; i7 Z - }
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- const mat = new Matrices();8 k- T* {4 |5 |. Q2 O
- mat.translate(0, 0.5, 0);
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) j4 P1 P# R, f, c! M7 ?- function create(ctx, state, entity) {
. E/ w, N9 Y0 i. [+ b0 B/ c$ O - let info = {0 w- g! a6 @+ C3 w3 Y# N
- ctx: ctx,$ a# S- n1 v; I. j9 C, c+ \3 p% \' m
- isTrain: false,
5 U; [( `8 E0 J - matrices: [mat],
1 q; H$ }: |' ?8 S - texture: [400, 400],
5 P5 g1 d* Q5 H7 `/ k4 r- j2 r7 O - model: {
- J% C2 ] j# i7 o3 Q - renderType: "light",: |0 A" t W( b* @ R
- size: [1, 1],
; c1 G8 S0 i5 V5 \8 M5 ~ - uvSize: [1, 1]
1 P, s- t1 Y( ]6 v. d) Y, ? - }
$ ~4 Q2 J7 y w5 S - }
0 w" N0 m4 T2 e% {+ [- u2 t - let f = new Face(info);& V1 c. G3 R t" f' Z
- state.f = f;9 V" L* R5 D- H: y7 x+ ^2 ^
- 6 q a. V* |% u4 P- l u, Z# c
- let t = f.texture;
9 {3 Z, s8 n" Z1 K3 W - let g = t.graphics;- A* N2 X3 j I
- state.running = true;! Q- O6 k+ X+ Q( ^' k
- let fps = 24;
% I. V) ?% t; _. S) j$ ? - da(g);//绘制底图
0 c& ^! S, a2 ` - t.upload();
" D: |0 U- w, n2 j' p/ A/ A# J; U - let k = 0;
5 a' G4 F6 F, J B - let ti = Date.now();
# b& N: J. U) y$ s- m - let rt = 0;
! S/ a8 o* J$ `% `3 O( R - smooth = (k, v) => {// 平滑变化9 M) a6 J. k6 T' w8 @
- if (v > k) return k;
' q! ?9 V- [9 B7 Z# Y7 | - if (k < 0) return 0;2 `3 ^. c/ u# P n- p5 |3 o1 n/ {
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
' |, U- X$ E7 s - }
: R% d1 H1 s; [$ ]2 C" { - run = () => {// 新线程1 F3 c' W1 `5 Z+ a5 ^7 T- {: S
- let id = Thread.currentThread().getId();
% X6 @6 V: Z0 w9 b( m4 T$ c" B) M( F - print("Thread start:" + id);1 s3 k5 q8 \" i. v ?
- while (state.running) {; \) l! P3 t# H# H7 |
- try {( J8 f0 C- ^2 t( ^! E( d. ~+ ]
- k += (Date.now() - ti) / 1000 * 0.2;
0 Z6 k! l) J: | - ti = Date.now();* x* |5 m) m- B( t) z- t
- if (k > 1.5) {
/ v: M2 k: O; P d- |; w: ~ - k = 0;# s8 r2 x+ t/ F1 ~1 e) {" C0 ?
- }8 n: h! O+ f6 y4 k6 O& g
- setComp(g, 1);1 A8 `- F5 h' ^ X
- da(g);
. x* ~! B8 a* Y" J - let kk = smooth(1, k);//平滑切换透明度6 U' e9 W9 }! a+ Y
- setComp(g, kk);8 k V8 R8 v5 {; f
- db(g);
# s2 f( c9 W" S8 X/ u - t.upload();
" C1 u3 p; m% p0 B - ctx.setDebugInfo("rt" ,Date.now() - ti);
; {2 w/ h7 r( Z$ t# W - ctx.setDebugInfo("k", k);" I: l6 x$ k1 v
- ctx.setDebugInfo("sm", kk);
/ g# B+ j" \+ d3 H6 q - rt = Date.now() - ti;) N: J+ u- l6 l5 Z# K L) p( }
- Thread.sleep(ck(rt - 1000 / fps));
% \3 z, ^4 U2 X( |, E - ctx.setDebugInfo("error", 0)' y: e5 F* B2 S& Z
- } catch (e) {7 G" {6 P N3 C4 W2 f' S
- ctx.setDebugInfo("error", e);; p. U2 b+ F7 e: h- w! L- t
- }# V) ?" b& d3 s4 Q
- }
7 C8 N! r( V8 a) K4 H& ^ - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");( s4 d4 M4 T2 n7 g8 Y7 a& O
- th.start();. F! ~& v$ ^8 i1 E X- o9 T4 i; u+ ^+ k* y
- }" W( q/ \0 ?* L- X5 K- v
I9 ]" r; C4 n1 ~' O% D- function render(ctx, state, entity) {
I) k0 h3 d1 P# e& i: r/ K2 V& i - state.f.tick();, A6 _8 i- u4 W3 r
- }
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- function dispose(ctx, state, entity) {
& H/ t. {, a, ~ - print("Dispose");
: u! X% g" V! V" C: w - state.running = false;" K: K* v# W, W) D& k4 ?0 c
- state.f.close();
- H9 P: m7 v* Q - }
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- function setComp(g, value) {
& p1 y4 a l' ] - g.setComposite(AlphaComposite.SrcOver.derive(value));
5 [8 V, n' i, ~" M, r* X7 C8 D" K - }
复制代码
1 `; S `1 P! \' 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。9 b* L9 O y8 a. `
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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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