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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。
, c7 B! {# i- W$ ~5 B- importPackage (java.lang);
, r, `( j' \' j. u. A( r" u' Z, w - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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u' `4 }0 m! g, `% T1 F. |- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {: w8 N5 ~+ I2 }4 e
- let frc = Resources.getFontRenderContext();
$ u, ^3 x" C" H2 Z k - bounds = font.getStringBounds(str, frc);3 ]( Y: W) o$ u
- return Math.ceil(bounds.getWidth());
# U3 ]3 v: r4 S: } - }& |2 Z5 f( g5 r
: I- F- d$ t) E: U- da = (g) => {//底图绘制
/ W+ b* A( p; b4 P& I! k - g.setColor(Color.BLACK);( h5 p3 G+ D3 N- `# W9 f
- g.fillRect(0, 0, 400, 400);0 t0 _7 h: A& r9 ]' f' ?; c
- }
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. W, J c5 `: @- db = (g) => {//上层绘制) `9 l# o! R- v: I/ I/ {( n
- g.setColor(Color.WHITE);" ^5 f. [! N3 v! P" |
- g.fillRect(0, 0, 400, 400);
: o3 v) v! n% ? - g.setColor(Color.RED);
" S/ c4 a! W2 V$ B& |/ i - g.setFont(font0);, v$ D2 Q5 e, k5 e
- let str = "晴纱是男娘";" t7 Y' w5 |9 H! n
- let ww = 400;8 [& y& _+ y* f9 u1 ?" Z d- R( P1 s% R
- let w = getW(str, font0);
8 J, H" V z' R - g.drawString(str, ww / 2 - w / 2, 200);, R5 O- n% C K( @, ^0 a
- }. C" {# j |' ?! o( ^- e, _
& m) u. y0 Z% p* |6 u5 |0 T, G- const mat = new Matrices();
/ E, B" V* ]3 b+ I8 O$ n! b2 P4 y - mat.translate(0, 0.5, 0);$ y; @# e& H7 I9 l: q6 V" e( D4 L
1 a+ L: ^& ] q: f7 R) X8 S. G- function create(ctx, state, entity) {5 L" n$ n7 R$ N
- let info = {
4 j% c: y0 V. A; ^& |) M - ctx: ctx,
# q0 _% F- A# O2 E - isTrain: false,# g4 C3 X! V3 e$ ~3 o
- matrices: [mat],
$ {3 M! Y3 [; D0 b: i$ @; R - texture: [400, 400],0 z2 H* \ Y" ~% ?* T
- model: {
' H/ Y6 v( \+ X& @3 A& u - renderType: "light",# }: q4 j+ i) L
- size: [1, 1],
1 E6 v( @' V1 p3 ] - uvSize: [1, 1], @, t. t- l, P3 o! t+ a
- }
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- let f = new Face(info);; U! }1 [& Y4 n6 M n' @
- state.f = f;& B8 f0 J9 P8 z8 @
2 [8 S+ f; | I* R8 }- let t = f.texture;
5 J% P5 [& k* @8 S; ~$ B6 \- y - let g = t.graphics;
`5 U e( P5 o, P - state.running = true;! H# n( P5 f U) x( ^9 Q0 _
- let fps = 24;! K0 f& L& D U
- da(g);//绘制底图
& [& {# N' ]2 @7 F' v* u+ E& D - t.upload();& w" R! l2 E8 ?0 e: A. s* i
- let k = 0;
- s6 @* m9 |. T - let ti = Date.now();
% q1 U# g9 {. ~ \ - let rt = 0;
! y+ x- i& o% Y/ Q: b/ _ - smooth = (k, v) => {// 平滑变化
4 x7 s1 v0 j0 J% z: ~$ s - if (v > k) return k;3 [! W1 ^4 b: n0 t& }9 z& v
- if (k < 0) return 0;
4 X4 U. c5 ~9 d y - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
8 m! l( D* _. q. ` - }
4 O1 i4 Y. H7 r2 Q0 f: t - run = () => {// 新线程
! ]* {( s' Q) M0 B. W# f - let id = Thread.currentThread().getId();# e: K* t$ \3 F& ^) ^4 f& k
- print("Thread start:" + id);2 @7 \/ _( i4 c+ p, S+ V* D, }6 r
- while (state.running) {
/ E- S! |4 ^* o, Q9 N; w" R. _ - try {
4 }) d S0 m5 j: N) Q% K - k += (Date.now() - ti) / 1000 * 0.2;6 K# N7 s Z* Q$ A4 d
- ti = Date.now();
( G" W' o7 f# e9 L4 ~% p - if (k > 1.5) {9 m% w5 H- ^7 M* Q
- k = 0;, y7 ^8 v0 Y5 w0 V
- }
7 [+ M2 p+ m) J( x6 B" x1 h7 |' [0 v - setComp(g, 1);# T0 k: q3 i7 R+ i
- da(g);
' @. I8 z) {/ L; \% v - let kk = smooth(1, k);//平滑切换透明度' [2 B+ E; x" c7 r6 s4 x- A6 B& v1 e
- setComp(g, kk);( I; ]' b+ z$ Q. i! a2 Z
- db(g);
, K \* b. J/ P8 W! p. T - t.upload();6 V. q2 {& E; l
- ctx.setDebugInfo("rt" ,Date.now() - ti);
& e' i) p" g6 p( H2 f3 o& t: k - ctx.setDebugInfo("k", k);# u' O* I; F- G. X( Q
- ctx.setDebugInfo("sm", kk);
1 y; i2 f1 ?2 z& R9 H, x - rt = Date.now() - ti;
0 @+ t# i+ u2 X$ O - Thread.sleep(ck(rt - 1000 / fps));
4 |8 S1 V4 D/ v" W - ctx.setDebugInfo("error", 0)
9 f% r5 q) g3 U - } catch (e) {- H7 v$ c% [3 w- n% @4 ^# H
- ctx.setDebugInfo("error", e);
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- print("Thread end:" + id);1 s$ h" E: k2 [* @$ I8 V( M
- }
1 L& U9 d3 |8 F% T+ c* B4 } - let th = new Thread(run, "qiehuan");
- f# c( Z2 l; {- v% p - th.start();3 A3 v) j; ]; ]1 ~( w1 y- @
- }/ v+ O( c* p4 r. \0 p
/ Z/ L) J. H2 ^7 Q: `- function render(ctx, state, entity) {
~1 S- e6 ^( P3 \: l: F2 I0 h- t+ y - state.f.tick();1 X5 C6 j: M) Q4 e
- }, }1 S$ w5 r: |) h* Z( S9 n) i
- 9 r! ^. c1 Y& g6 X0 {1 n
- function dispose(ctx, state, entity) {
5 [, r3 ~* `* L' S8 M' j - print("Dispose");' `' Q! {$ s7 d( W. I& L
- state.running = false;7 r; y. c6 E$ m: T0 ?$ ~% |. _
- state.f.close();
6 ^) w, V% D! e4 D3 W - }
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8 T8 U6 q) g5 x- v Q) }) Q- function setComp(g, value) {8 G( G7 q: z! T* V2 h2 ~4 B+ L5 ^
- g.setComposite(AlphaComposite.SrcOver.derive(value));0 h0 v' h, p# j9 r# n) x
- }
复制代码 0 Q0 R% b6 [8 s9 u% c$ H+ ?
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。& W/ F6 j2 ?2 h' t
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( Z2 i2 I( u' |顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)2 z; d l8 p& c
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