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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。5 o" l7 U7 J+ T* W; X; S
- importPackage (java.lang);
& l( t- M8 w2 A - importPackage (java.awt);" Z" Q) `- U+ @* f
- ) K4 ?! w' Q L2 Z/ t
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);! Y7 q# @% b8 I, ^1 b
- $ B; H, _8 S9 `! ^# K" C( \/ |
- function getW(str, font) {7 ?4 R% _* `- z% H' b8 L4 g
- let frc = Resources.getFontRenderContext();9 [7 r* b5 G4 u) B0 r( G
- bounds = font.getStringBounds(str, frc);
9 G" ?- d2 J3 Y8 } - return Math.ceil(bounds.getWidth());
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- ; Q }8 V H1 N7 R8 _1 L% a4 N
- da = (g) => {//底图绘制$ v! O8 F7 D5 L( h4 L) l$ L
- g.setColor(Color.BLACK);- P; A9 v; c% V* ?( r- a4 K
- g.fillRect(0, 0, 400, 400);
' L$ i3 r" D% I3 X$ c - }
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- db = (g) => {//上层绘制
, p: T" I( [* \7 w - g.setColor(Color.WHITE);
5 d5 a/ t3 ~. M" W - g.fillRect(0, 0, 400, 400);
" ~, y# ^2 h2 `) z s w - g.setColor(Color.RED);
) Z3 |, _8 \. D2 x1 E - g.setFont(font0);
+ [% l7 V$ n1 f0 g - let str = "晴纱是男娘";
' M4 a: C6 m/ ]' j6 `6 t/ Q - let ww = 400;
+ G' n( C/ r& A: O, w7 m - let w = getW(str, font0);
h5 i3 S7 F" p6 s" z2 t( Z - g.drawString(str, ww / 2 - w / 2, 200);
; Z0 b" ?4 f- V& ~# M1 ]4 P3 C5 v4 s9 O1 | - }
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+ c) k% }- `7 u1 {) K! ^- const mat = new Matrices();
3 _# k: N2 a: c" S, T* i - mat.translate(0, 0.5, 0);
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* i. z# A2 y$ k1 P0 x6 W- function create(ctx, state, entity) {
, x! Z+ t" U4 Q. r( Y# |$ e, x - let info = {7 l" s& J8 n. Z3 G) A
- ctx: ctx,/ q; p* W7 l9 Y/ w1 M% j$ \
- isTrain: false, |4 ], d$ Q+ S# s
- matrices: [mat],
, l) C% \; b @, Y - texture: [400, 400],
5 |& _" L1 ?. @5 c4 Q+ c/ _ - model: {; u% R; m: B+ a4 E( N
- renderType: "light",$ X8 Z/ \% g; U, m! V/ f" J; V0 o0 D
- size: [1, 1],( h" I1 x7 l. _3 b
- uvSize: [1, 1]4 S6 s7 ?( l! s6 P, O) _& ~% |
- }
b# q' c% g" f: k8 p - }; b6 K- m- b" p
- let f = new Face(info);1 }6 b' I0 B/ }; n! ]$ l
- state.f = f;
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$ w9 |+ ~( @" S4 c5 t- let t = f.texture;- |4 U3 R& X* W
- let g = t.graphics; F- C1 b) ]9 Z+ p/ Q8 T9 y7 p
- state.running = true;
; Q6 i$ q, N: }0 c - let fps = 24;
+ r- C/ t3 {( u2 C0 L5 S! p - da(g);//绘制底图4 Q2 y5 G8 F; S3 k0 _
- t.upload();' {$ ~7 ~+ E8 |" h
- let k = 0;
' P7 p4 J. j9 ]+ g0 y; Q - let ti = Date.now();
# J6 b' m0 q! |& X - let rt = 0;
* u: W4 w7 o4 ^ e - smooth = (k, v) => {// 平滑变化& L6 W( _( c1 L5 o. H& `
- if (v > k) return k;
( x. j* X" i' M& j) ~$ e; L7 E | - if (k < 0) return 0;
9 C3 j1 K N& k0 |/ Q9 N7 B - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;' }- Q" X, o% ], o) U/ a5 b
- }
" H+ g/ T6 s8 f/ h' W7 U - run = () => {// 新线程
0 M P9 \: s+ R) z' _, \$ O - let id = Thread.currentThread().getId();, q4 g, T- n8 ]9 M1 _
- print("Thread start:" + id);
/ e3 D! R+ P, F/ u+ f - while (state.running) {0 @2 O/ z% l3 D3 B5 T+ y8 w* ^. |
- try {# Y9 Q# P% D9 a P
- k += (Date.now() - ti) / 1000 * 0.2;
5 w6 v0 l% \% I& C) X; N - ti = Date.now();
# {/ @/ ?: z. T( M. S- \& |, w" T - if (k > 1.5) {6 { u* X$ F8 }& ^
- k = 0;
8 b! y% B, ^3 V - }$ c4 l3 I( Q# ]# n2 v
- setComp(g, 1);
/ O, [$ h! r7 J% q& x - da(g);
]( R! O+ H" G$ h - let kk = smooth(1, k);//平滑切换透明度
( I! B7 R5 z! Y8 D, t5 o' ?. h& h - setComp(g, kk);6 ?; x3 R* V, m3 l; G- F" H
- db(g);
. A4 H' W/ `8 D1 U8 r) @ - t.upload();
: F9 U9 K0 w) o5 Y - ctx.setDebugInfo("rt" ,Date.now() - ti);4 j S3 G+ j9 e2 e8 H" B7 Q
- ctx.setDebugInfo("k", k);
, b" G8 E5 {" D5 q, |$ ^6 }4 Z, [& H - ctx.setDebugInfo("sm", kk);) w- J; S; ]+ R+ t) w
- rt = Date.now() - ti;9 ~7 O3 |7 {$ J! h5 w
- Thread.sleep(ck(rt - 1000 / fps));
) L. N5 m- B. T8 K6 t) Q - ctx.setDebugInfo("error", 0)
7 a# `% C; n* U0 J8 Q9 d - } catch (e) {2 ~1 d( Z8 P7 ]! ? w- n( P
- ctx.setDebugInfo("error", e);& v9 i* ^; a6 v* G/ e2 b9 i
- }
$ f4 J1 e, _3 k8 @ - }: }) W" E2 V$ A$ m5 A1 N8 x
- print("Thread end:" + id);% X. l* @( Y9 X$ G7 b/ g
- }
6 r. n; n' S3 }4 d; V* r - let th = new Thread(run, "qiehuan");
) A' c# c/ W& ~$ { - th.start();# o) z- ?+ c* w9 P0 {( y8 D; v! T2 {
- }
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- function render(ctx, state, entity) {8 q1 W" J1 ^/ G1 d# H, l: I: `) ]% R. Z
- state.f.tick();
2 O7 F! r& N7 _& f( ^# X - }
@5 O- E$ a% y* {
& a- Z) g" ?% F9 [: n5 |+ Z- function dispose(ctx, state, entity) {, ]' B3 B& B4 t( M) r* x
- print("Dispose");
* o! r$ B$ A$ g* C5 | - state.running = false;- S* z7 X7 r- |0 n1 f- M
- state.f.close();1 c$ p* R9 C. C Z0 k2 U
- }
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- function setComp(g, value) {& F! M, s. z' j/ \
- g.setComposite(AlphaComposite.SrcOver.derive(value));
8 Z7 r, W' R7 @ - }
复制代码
" {& v6 r# Y; D* w. `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。( ^# ~% C+ s' U* m3 k
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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)3 O- q3 m' \( ?! G1 J$ q
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