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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。$ z; _% g j) a) i0 R0 C& F" \
- importPackage (java.lang);2 L, N. K, ~! v; \) g
- importPackage (java.awt);# k5 H1 B: J$ [! K$ ]' r& z9 k2 _
- $ N- J/ x5 n0 C' ~ L9 e0 i
- include(Resources.id("mtrsteamloco:library/code/face.js"));
% R7 O7 t+ U4 B4 m - # {. W5 g9 o) n- E- a ~9 }
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {9 J' z% a f/ d! y8 f! F
- let frc = Resources.getFontRenderContext();2 r6 @4 [, f* Q& Z' c
- bounds = font.getStringBounds(str, frc);- w0 f, g( T( {8 Z( K
- return Math.ceil(bounds.getWidth());, Z9 w; g6 s7 {/ q4 I9 {
- }' K. t4 _. k; l0 }* m0 O
- ) @- B8 \1 o0 r6 ?' b4 Q. k
- da = (g) => {//底图绘制
% K, V( D) l- E+ U: V1 c7 _ - g.setColor(Color.BLACK);2 m/ I7 {/ A4 G, j/ c% ?, Z+ M$ G
- g.fillRect(0, 0, 400, 400);
' C, d6 y, F b+ j& W - }
% Q7 c7 x: n' ^3 i/ k
. g, {4 L, Z9 _1 ^- db = (g) => {//上层绘制
3 r0 F Z5 r& a T, j+ ^1 F - g.setColor(Color.WHITE);- p" W3 I# Q- \5 s- k
- g.fillRect(0, 0, 400, 400);
6 b6 n! m3 j ` - g.setColor(Color.RED);
% \, o/ [; ?$ j8 e# }$ v5 d8 P" C - g.setFont(font0);
; r$ \! v6 F7 Q$ v0 H% F. ^ - let str = "晴纱是男娘";3 |0 x! t4 q% ?' I" f
- let ww = 400;
1 H5 O, D/ O9 v! b- c" J+ I - let w = getW(str, font0);
9 i/ ~2 W" [5 `# i% Y5 w5 s7 W - g.drawString(str, ww / 2 - w / 2, 200);
" Q3 A+ l8 q, p. w - }
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- const mat = new Matrices();0 t/ F) M; p" [4 [4 m* [
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {3 f# d2 K2 r: U# z; z S6 D, z% H
- let info = {
) o! V, {8 T/ {- {# D3 P( X: G) @ - ctx: ctx,
. M: e/ |; E, _# J) v6 |8 ?7 Y - isTrain: false,: \: B: N5 P5 t. p* C+ i2 r
- matrices: [mat],5 L, o+ L! i: w* |" H
- texture: [400, 400],
% Q1 {4 A5 P& v5 z; ? - model: {/ n3 u7 Z, l$ b
- renderType: "light",' s2 }% z! F* A
- size: [1, 1],
5 k* b, C, B8 v: p/ }7 U s - uvSize: [1, 1] r. S$ U% A2 |2 V# D
- }4 Z8 N3 n- Z/ S+ x6 N+ z- T
- }0 }1 i2 X3 n, q) m+ W% z! ~+ s
- let f = new Face(info);
, z' N) P- n3 Q. T; q - state.f = f;
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- let t = f.texture;8 h! p9 l; L8 u1 e& [& a2 x
- let g = t.graphics;2 u* e _4 q) O) O i" z7 O
- state.running = true;
q% M. N7 h# s( `* g' [ - let fps = 24;
" [6 B3 ]; h4 z9 Z6 L - da(g);//绘制底图
9 `; b6 V6 |) i$ r) N1 L - t.upload();
. ]0 `2 y- y2 b& x7 M - let k = 0;1 s; d% H; W: \( t: k
- let ti = Date.now();! L/ Z1 j6 _! {; @
- let rt = 0;7 ]% t" n/ z! w2 E& @/ b
- smooth = (k, v) => {// 平滑变化2 i [: t) v/ ]8 \, `
- if (v > k) return k;: [/ \. p! d0 [4 G. T% U
- if (k < 0) return 0;
~9 b& q0 I, y8 S% { - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
+ {$ F1 N/ B' C0 x( g' A+ t - }
# x" O- e) |7 t2 c' M# s - run = () => {// 新线程
4 O7 }# H6 _4 a4 `* s. z3 |! p - let id = Thread.currentThread().getId();) E9 _/ h2 ^: H. v7 c' R
- print("Thread start:" + id);
6 c( [( N( P: l7 u1 @! {9 \ - while (state.running) {5 \! @: [/ A8 W
- try {
g! n5 w; \+ T3 X. M' k - k += (Date.now() - ti) / 1000 * 0.2;) v* [. R% n# l( }7 s3 p
- ti = Date.now();
: U& U* K2 _. x K( Z5 ^8 E - if (k > 1.5) {
2 D# P, Q4 I& T8 G! ?% U$ a2 G9 ` - k = 0;; r& k7 t2 d) b) {, l. y
- }5 _- o3 s+ s7 G2 _
- setComp(g, 1);. i; H& ^ J$ [. e) x r# L
- da(g);
5 e2 \- X. U# I( _6 N- T6 p' y - let kk = smooth(1, k);//平滑切换透明度
9 g3 S- r, |' K% }; |" N - setComp(g, kk);3 W4 e$ G7 q* V
- db(g);. U0 y9 |5 A8 [' g
- t.upload();& M6 M( F5 V; ?4 R2 b
- ctx.setDebugInfo("rt" ,Date.now() - ti);
( z& R: y7 m3 E9 W! \2 X. Z0 ^4 d - ctx.setDebugInfo("k", k);
( C5 z, N) k8 E. F: K4 r3 I5 ? - ctx.setDebugInfo("sm", kk);
( D4 S. `; A- T$ b, {: t - rt = Date.now() - ti;5 K8 G! y- w2 T2 T
- Thread.sleep(ck(rt - 1000 / fps));6 r( K& x7 ]0 S2 l. C- d
- ctx.setDebugInfo("error", 0)
. _" `2 G6 n4 S0 T0 [ q) f - } catch (e) {1 d! q- z0 A# I% c
- ctx.setDebugInfo("error", e);
3 i. k( r1 P" W! ^5 \ - }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");1 t4 `* ^! {+ X6 U% _
- th.start();
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2 `% d$ R& l# E, O- function render(ctx, state, entity) {3 Y7 B, K: @! @: Y8 d5 n) Z8 z
- state.f.tick();
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+ i1 R) W+ C& f3 O- function dispose(ctx, state, entity) {
" L+ R! }& c6 F: M! n: `2 q - print("Dispose");
) Y0 `' e) }; l) q0 Z: ~+ a* O8 e - state.running = false;
% @+ _$ z t) u2 a* M - state.f.close();
, q4 Z3 e4 f" E; r4 l' q* t% D - }
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- function setComp(g, value) {
& c, x4 O: W9 z5 I* C0 a1 }. S: Y - g.setComposite(AlphaComposite.SrcOver.derive(value)); |+ s. g1 s8 P( L% q. F: F
- }
复制代码 0 _8 \- N! i& b: S2 l+ O( k! F
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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