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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 i7 Z4 |$ X3 a D; D/ X- importPackage (java.lang);
6 w$ L9 z5 P/ F+ G# r: m' N - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));; h, e* {8 | v- Q! S# V" u
- % e! u) Z" Z4 O1 x# P
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
& M; d: n. [( e2 c+ T+ { - . m6 }1 _( G$ b9 z5 a5 W# F3 Y6 L7 j, y
- function getW(str, font) {
8 g9 i$ z1 g9 }! Y( I - let frc = Resources.getFontRenderContext();
' b: p$ g, V3 G4 G# v& { - bounds = font.getStringBounds(str, frc);
. _5 J9 v9 y8 T - return Math.ceil(bounds.getWidth());9 \6 x; T2 u8 Z$ Q( M/ V! h
- }
1 i' Z1 Z5 Y. `9 p/ k1 L
6 u6 n2 w p% s# r2 V8 w- da = (g) => {//底图绘制+ f2 B6 B: |7 [* ~- Y* n
- g.setColor(Color.BLACK);
8 }) b. l( ^- j! u( K9 V8 _; Y0 }$ p - g.fillRect(0, 0, 400, 400);
" @) ~1 F7 R% L. Y/ D' `4 y9 n - }
6 {) p1 t! a7 x - ; n' P2 [3 [5 P: q
- db = (g) => {//上层绘制
, y, [+ k" F9 d: u1 l8 I1 O - g.setColor(Color.WHITE);
) m# U* k5 d h( N) e8 b+ U2 ]4 i - g.fillRect(0, 0, 400, 400);, C' ]/ ]% n) P/ M1 A
- g.setColor(Color.RED);
: b4 F# p# ^. ^5 K* m/ X* b. | - g.setFont(font0);
# j0 k; c/ J; \; k7 U - let str = "晴纱是男娘";) e% Z- j1 a1 \
- let ww = 400;
u4 ?" J/ l; ~9 f - let w = getW(str, font0);1 P2 z8 t- A# m( W5 p4 ?
- g.drawString(str, ww / 2 - w / 2, 200);
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3 c. I: `1 A4 [* Y% m6 ]- const mat = new Matrices();
, T( G5 R" z3 e, _9 ^6 d - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
# T* b* D% e7 B5 G; a9 T - let info = {/ f8 G# m! G: |- Z6 W+ D
- ctx: ctx,
6 A0 \9 n ]! d. R6 v; H1 G8 H - isTrain: false,
7 \) t# e9 t* j+ [' B+ G" r - matrices: [mat],. J/ f, E/ D4 d9 Z [
- texture: [400, 400],& U, B# m0 @3 G6 `0 }0 R- k+ s/ K D
- model: {
6 W6 I( V; O. V) f& A - renderType: "light",
3 `$ h7 `$ G5 ^; ~ - size: [1, 1],
# R; V0 g0 |8 R. O* e: Y - uvSize: [1, 1]" F$ H5 n M! Q
- }
% Q5 b$ R. d. }3 m/ \$ V! J; k - }
& o5 L, ^* |5 G - let f = new Face(info);& ~ b* v) A1 Q
- state.f = f;
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- let t = f.texture;5 \5 M9 V3 M0 Y0 b& q
- let g = t.graphics;" @1 Y8 I. C7 G [0 K! f4 l
- state.running = true;
$ {* F; l, X2 d/ o: H - let fps = 24;/ G- S1 H. G9 W0 s
- da(g);//绘制底图
% l9 h- f( y! f; C! L: ? - t.upload();
3 u- U' @) g. b7 \5 d; Z - let k = 0;! r+ J: a4 b g8 @7 k
- let ti = Date.now();0 x% [, w. e# a& Q9 p* `
- let rt = 0;- d+ E( ^& T' E
- smooth = (k, v) => {// 平滑变化
! G7 k, f# L3 Z/ Y1 ~5 ?2 v, K - if (v > k) return k;& O1 O' q7 G, r9 P* L! b# g
- if (k < 0) return 0;1 _! \9 x) S! w2 h* o; L
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;9 e# d! V3 |+ C! |" H
- }
0 i8 c4 F; ~' K - run = () => {// 新线程: c8 ~1 X& Z( _7 M% n% t5 ^
- let id = Thread.currentThread().getId();
k% G0 x3 H5 d - print("Thread start:" + id);6 x P9 U0 }+ i
- while (state.running) {
4 `+ n5 H" e( f% h9 H) R - try {
/ l. V. K. G7 E4 y% \ e9 ? - k += (Date.now() - ti) / 1000 * 0.2;6 B& s! S/ o3 r( S6 U4 ^* ]& m& ?
- ti = Date.now();
% w' @+ {8 n X - if (k > 1.5) {
# K6 x: E% b2 [0 j' C p3 W- t - k = 0;# o4 ], S8 o) w: u/ h: ?. H
- }
. o; V! p/ h, |$ o% ~& ^ - setComp(g, 1);
$ Z2 r( ?0 ]6 `9 w - da(g);
; D' s# l$ a W& [5 T% i - let kk = smooth(1, k);//平滑切换透明度
# u0 P( |5 \8 o9 E. d f7 L' H - setComp(g, kk);8 y. q; n1 U ^% H# H' P4 ^
- db(g); J) {: N/ V7 @* G! N2 {9 ?$ A
- t.upload();
2 H# P' A p: N( G - ctx.setDebugInfo("rt" ,Date.now() - ti);) p" K6 f- ~4 z- ~
- ctx.setDebugInfo("k", k);
2 ]% A2 \0 \6 j) w - ctx.setDebugInfo("sm", kk);
- w4 q, t/ }2 I) H' N. S5 h$ o - rt = Date.now() - ti;
0 D% z) @! l! x - Thread.sleep(ck(rt - 1000 / fps));
! x8 a1 @) q1 x( O. R - ctx.setDebugInfo("error", 0)3 @# K$ O: f9 x, y O: t, ?
- } catch (e) {
) Z) f% G3 I; ?5 ~& Q - ctx.setDebugInfo("error", e);
, {& @9 D5 i6 r - }' X* \# [' |9 @
- }
6 w2 D8 q& D0 z3 S: ]7 P - print("Thread end:" + id);0 m( n! o/ ^+ T
- }
0 `5 w F& @0 D+ o3 b - let th = new Thread(run, "qiehuan");
: C: W" A* J* R: _& v - th.start();+ X& F# a' C5 n) W
- }
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* p3 Z( Q3 `; a* ~, `7 b$ x- function render(ctx, state, entity) {
0 Y0 m% _+ i- T* u/ w/ p0 s3 Q - state.f.tick();5 T. A5 h+ c( e9 U
- }7 `3 q' W, L6 v8 `! o
; l. k$ [. ~5 J: o5 j8 |, x0 y% g% T- function dispose(ctx, state, entity) {
" I) [; X" x7 a# a9 w% @- ] - print("Dispose");
' Q/ `' j0 C7 P - state.running = false;4 @9 S: G4 Y1 d1 x* }( x
- state.f.close();
0 x) Q2 ?& }( T+ f% i( K P - }
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- function setComp(g, value) {
2 a( \7 [8 a1 z" u# P1 ^, y- M( a - g.setComposite(AlphaComposite.SrcOver.derive(value));; O( T- h6 H# y5 L+ ?
- }
复制代码 0 Z) C3 S2 n3 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。! U! C# J+ J9 I! j, W( g! ~
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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)0 D- M$ H2 v# G4 {/ m9 [
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