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5 r, p' I$ C: P' w6 F+ ?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 ]# R# M6 q7 y, n- importPackage (java.lang);
$ m* j4 A% D+ x k1 R - importPackage (java.awt);; M! B0 G+ q1 U$ d' u
) }' x9 t0 ?$ j, N0 x1 n" V2 B- include(Resources.id("mtrsteamloco:library/code/face.js"));3 S, G3 J: ]3 c$ ]& p& W: j
- % Y4 ], B2 l9 Z. `! o8 f
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
( J/ `5 `# h5 F! D - let frc = Resources.getFontRenderContext();
1 n' N, a# i. H% m# g - bounds = font.getStringBounds(str, frc);
3 R4 t7 ?: h6 p# l/ d* J - return Math.ceil(bounds.getWidth());+ h" P& G% G. y6 a8 X
- }
3 F6 a9 d( G4 }2 |4 r - # b p' B1 c) x. M' c$ u. I
- da = (g) => {//底图绘制
9 Q8 q0 T, {2 T. z5 f2 S - g.setColor(Color.BLACK);/ {4 B5 i" y# l' T
- g.fillRect(0, 0, 400, 400);
% ], V) E. @8 Y8 Z; W1 K, q - }
+ l6 k, W& d4 L. _8 R9 n - 9 x9 W" F+ N# n& l5 |
- db = (g) => {//上层绘制6 C; f& c9 e% l5 Z8 j+ V
- g.setColor(Color.WHITE);
3 N; t* @6 L# F# M" n; I/ o - g.fillRect(0, 0, 400, 400);* n& c9 F! n9 f5 n/ m% u6 k
- g.setColor(Color.RED);' d/ w' [6 z1 d% q
- g.setFont(font0);
7 W+ G) ]" \& ?0 f - let str = "晴纱是男娘";
& [+ P2 C! j$ c, h) f0 J( o - let ww = 400;2 e* t% ~0 z' [0 ?1 c
- let w = getW(str, font0);
' z3 I# I7 a; S - g.drawString(str, ww / 2 - w / 2, 200);
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- 3 K$ N( E9 ]2 w8 d, Y6 Q( _, G
- const mat = new Matrices();+ Q( Q- g3 X# P* A1 l, j) M! _0 ]- @! }
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {8 c0 t/ q9 u9 ~: }* _; l0 C
- let info = {( T ~/ w- t3 _$ y
- ctx: ctx,4 H4 X0 b9 Z/ O/ k) S
- isTrain: false,* M3 b# d# ?- L4 A; X, ?9 E+ p& H7 v
- matrices: [mat],
p% p6 `1 Z4 y: v ~, t - texture: [400, 400],
9 r: s O, o* ^6 W: [ - model: {
( J$ {& Q& i: d. A$ x" A - renderType: "light",
% q! K8 h* y) [ - size: [1, 1],
" A8 ^& Y4 U; v( G7 X - uvSize: [1, 1]7 s+ v0 r5 x* Q; J# }/ R
- }
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- let f = new Face(info);
& D& C1 r+ s& F/ r - state.f = f;4 L# T1 f% |; g& v/ _- G$ b+ C* N
- ( n: G1 o& V* u( y/ `% E
- let t = f.texture;
: H& m( P0 I% \% m" ?- Z - let g = t.graphics;
2 p& a! `* H1 {+ U - state.running = true;6 ]1 t, m8 a) L" ^5 P/ _, \& Q
- let fps = 24;
# Q8 t: l) N1 H( @7 f - da(g);//绘制底图
- Q9 F* g7 v @) a( y - t.upload();0 _% {: u u7 r3 R& Q
- let k = 0;
2 n/ D- w7 g, Y0 E) Q0 Z: J0 } - let ti = Date.now();, H2 ]7 y( D8 w8 h. `. D
- let rt = 0;! k$ a, {, ~0 Y: }+ O. P3 x
- smooth = (k, v) => {// 平滑变化
" p, B5 q7 \- {# x( Y! S - if (v > k) return k;
2 K% K3 X2 b4 o" j' } - if (k < 0) return 0;
8 A* H4 r2 m! M, S/ V - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
; @3 k+ a, L1 O! Y3 M9 Z - }
3 F$ b6 c @4 x5 M5 E @9 u - run = () => {// 新线程" [: G" l% r& }/ F
- let id = Thread.currentThread().getId();% q9 p: \* ]5 [. Z3 t& ?
- print("Thread start:" + id);, A* q7 O9 B% S8 H& R" i& r" d% e: v
- while (state.running) {
% ~2 o; ]+ ]. n& k/ R ? - try {
1 o5 ~( [0 M3 b- f9 I! p - k += (Date.now() - ti) / 1000 * 0.2;0 H0 q1 V& h. g- J, ?
- ti = Date.now();# A# Q1 m+ k: h! j8 n3 I/ n
- if (k > 1.5) {7 f% `) J* H, _' c2 T
- k = 0;
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- setComp(g, 1); K8 n! q/ |* p9 V1 K& |# ]% `: [5 b) y; O
- da(g);
; J3 L) Q8 R5 ~' D7 s0 ` - let kk = smooth(1, k);//平滑切换透明度
* I% @0 l5 l# N% ~ - setComp(g, kk);
( b7 b$ o7 }3 @3 ?. Z - db(g);
1 p- T$ K& v4 c( y - t.upload();
$ E6 X( ~5 O! P9 @5 e, w# \* [ - ctx.setDebugInfo("rt" ,Date.now() - ti);
# G0 h- i* f5 Y; f5 X. p - ctx.setDebugInfo("k", k);2 P! O% X0 w5 g2 b7 T
- ctx.setDebugInfo("sm", kk);( V3 {) B E9 `
- rt = Date.now() - ti;
( u! X8 G) j m9 r9 M" t$ n1 G* M - Thread.sleep(ck(rt - 1000 / fps));
- X2 g" I5 j" \- t5 U, O) U q - ctx.setDebugInfo("error", 0)
( a9 E+ g1 T% F! h7 W - } catch (e) {* v0 T& ~- m2 d
- ctx.setDebugInfo("error", e);
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- }
% o5 g5 j1 \* v3 d7 z9 J1 [ - print("Thread end:" + id);
9 R4 D$ `8 z" I* x* y! j \' u - }; M0 b1 N% H1 l4 H$ ^) F
- let th = new Thread(run, "qiehuan");
( M9 \" R& j4 ~ b% D/ n - th.start();
# Q; _- k: P1 r8 z: l - }5 }/ E+ v* I- d0 N1 n+ y
- t# B' @9 p; E8 e! }- function render(ctx, state, entity) {
6 L; ?( Y! ^, v- g% }3 U$ H - state.f.tick();# K2 R6 X/ v) ?# m: W9 [
- }- ^( l/ a6 {. b4 r) M a
: {. Z* F, I5 x3 x( |- function dispose(ctx, state, entity) {; d& Y* N7 Z- ?2 k9 d' G
- print("Dispose");( b- a v0 |' W
- state.running = false;
. u5 \6 y7 m# g e+ L' m+ g0 F - state.f.close();+ m2 x R4 w3 |% e+ m
- }8 M2 g7 N C" Z, e6 y6 `& V
- ! A0 \/ G: }: g& E/ [+ l' N: P( o
- function setComp(g, value) {, C$ h0 @; }4 c
- g.setComposite(AlphaComposite.SrcOver.derive(value));
- ?8 I, B# `& Y; m4 Z: R- I0 j! @ - }
复制代码 3 }# q6 L" v* K, d: A( U* a
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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