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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 b0 m! o3 V' ~3 Y
- importPackage (java.lang);( c/ S/ y/ M/ p2 Y! M1 |5 v% @
- importPackage (java.awt);& [/ Y$ w1 `) K; l. Z. \! s" \% l, k
- ; F E! N' h) o. Q# a8 f
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);1 r# V& |1 H; g2 {3 {
- - x* M8 q, Z4 l" Z
- function getW(str, font) {: L2 Q: L1 `% w% r% E3 x( D
- let frc = Resources.getFontRenderContext();
6 V. v( e+ S; m3 q- b+ p7 W - bounds = font.getStringBounds(str, frc);# i5 T6 P) t' Q8 Q& R
- return Math.ceil(bounds.getWidth());9 |+ e( \# G9 k; B: F
- }
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9 ]! p3 p( c8 c4 A- da = (g) => {//底图绘制2 d2 K2 H% g0 ]( {, B
- g.setColor(Color.BLACK);
2 R8 k' I4 O. |) Y3 u: s- }2 @ - g.fillRect(0, 0, 400, 400);
1 i2 Q, j8 e6 ]' Q( |/ u - }. Q$ e( @5 I4 }$ k
- ' @- ^& w2 J5 b. U
- db = (g) => {//上层绘制
$ S7 [/ Z9 X3 y. n! ` - g.setColor(Color.WHITE);
1 p6 \6 ^4 n% X% ~2 j9 h) m! R - g.fillRect(0, 0, 400, 400);5 O" r7 b5 L$ N' b' N
- g.setColor(Color.RED);
! o( P/ ^) S! y( v! E7 j J - g.setFont(font0);
7 B9 |: v; o, {! v, M - let str = "晴纱是男娘";
# p8 b& f; Y2 R% B9 | F - let ww = 400;; e7 q. j; E3 t" ~+ ?6 K- O, _6 e
- let w = getW(str, font0);, F# _, l: z$ [9 ?8 ~! U" `
- g.drawString(str, ww / 2 - w / 2, 200);
h2 d: p& W; e+ Z1 ]. Z; w - }
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0 F& w/ ~. h- }' }# v! R- const mat = new Matrices();
& y0 m% |# `# @! E% s: Q - mat.translate(0, 0.5, 0);* g! ~4 X G7 u( w! j% ?
( ^/ z3 I4 k9 \7 g4 ]- function create(ctx, state, entity) {0 d4 v. [- M6 P1 k" @& w# B
- let info = {, {2 x3 h2 {" U1 K
- ctx: ctx,
- |% |6 Y4 ?3 c- F# Q! b - isTrain: false,& f* i: w4 q# ~
- matrices: [mat],; v8 U9 l4 u( D3 G X% d
- texture: [400, 400],
c9 c" h: o$ E0 | - model: {
# }2 ~/ F- t2 f; R M1 p9 J - renderType: "light",
6 N8 {+ f) j6 ^/ o, G. J - size: [1, 1],- p4 O! }) f. x% Y% ? M6 M6 n
- uvSize: [1, 1]$ B1 u6 R* n8 }) G
- }
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- let f = new Face(info);, E! U2 b8 e' O, D% D/ x- n Z
- state.f = f;' \. N3 c& U5 [6 G; A; Q) \
, n: g) x0 T; J" V( K; T* c- let t = f.texture;
( X$ W: H& |; B5 Z" k3 K9 t% M - let g = t.graphics;
- Y; k: ~; G# D: m7 | - state.running = true;; D1 V2 m N( Y( k2 B, K, c
- let fps = 24;
) B4 U7 v7 c2 ?. @ - da(g);//绘制底图
" b/ H3 E9 Y8 i/ U0 |2 h$ e - t.upload();
]/ l. a/ u+ ^! r6 h - let k = 0;" q+ Y0 n5 K5 k! ]# X) b
- let ti = Date.now();
3 F4 x: J3 M" U: }6 N, o7 S - let rt = 0; Z1 ? c$ ^/ Z% R, @. w- k. |5 Q
- smooth = (k, v) => {// 平滑变化
, c3 X$ r$ T8 E& } - if (v > k) return k;+ i7 f ~2 F' u+ k4 ~
- if (k < 0) return 0;8 z* ~0 e v3 @* g5 M' z6 M' m1 S
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
- R9 A! m* F, p$ Y# `7 n - }2 o4 B) t/ V. p5 U
- run = () => {// 新线程' U( X3 Y+ a' a! \/ C5 m8 K
- let id = Thread.currentThread().getId();$ _4 s$ W7 F+ b4 X! U; w
- print("Thread start:" + id);* a/ d9 @$ j5 @
- while (state.running) {) n' ~; v0 ~2 R2 M9 E
- try {7 J' ?3 b) x- z" |( c6 L6 j
- k += (Date.now() - ti) / 1000 * 0.2;$ Y. P4 X9 Y& [. p" Y
- ti = Date.now();
6 M) k$ R! X% C9 n$ G% X - if (k > 1.5) {0 ~3 H" g' o3 c- V
- k = 0;: t# w9 I8 s7 D
- }
: d# R' j! U- M; B/ m6 p - setComp(g, 1);
- E# p1 f1 h; ` B) _( [8 f! L - da(g);
; p+ ]; Q0 a" W" K: q' v - let kk = smooth(1, k);//平滑切换透明度- {1 c2 y. H# i5 ^, m, |4 a2 v- |
- setComp(g, kk);
) R: s4 W- `: Y' d [ - db(g);1 s3 J* S9 P+ F* q2 ~* X* g
- t.upload();5 `/ z8 m ^% \+ x# L3 p! v
- ctx.setDebugInfo("rt" ,Date.now() - ti);# j$ r% z+ g5 C% C& q/ a( \
- ctx.setDebugInfo("k", k);1 P/ k# ?% ^. b# c
- ctx.setDebugInfo("sm", kk);
1 q' b Q# k2 e - rt = Date.now() - ti;
& Y( V& q% R. {. C% s# g0 e - Thread.sleep(ck(rt - 1000 / fps));. w* w# Y' j/ | L4 L
- ctx.setDebugInfo("error", 0)' f% Z. s% K5 E0 \" Y7 W
- } catch (e) {9 q f- B8 ~- j$ E1 i8 e
- ctx.setDebugInfo("error", e);
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- }
. g& \$ B) r. }# M: a - print("Thread end:" + id);
3 f/ J; L" L( D% x' Y% d0 { - }
. h$ v2 C) g7 ?( N. r2 R3 m( h - let th = new Thread(run, "qiehuan");3 y7 ~- N/ Y6 f8 `% J7 U
- th.start();
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0 N, | r% X# C$ I1 I- function render(ctx, state, entity) {6 s8 ]8 k' e+ C8 E* j- z, K
- state.f.tick();
$ W8 A; B3 H# S% \: E8 Z9 z/ | - }
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. h9 X3 Y# z5 m3 a7 _; Y- function dispose(ctx, state, entity) {" }0 Q' b) X5 E* P; O
- print("Dispose");7 }& Z7 f4 `2 j1 F
- state.running = false;' l$ L5 T/ y4 m! ~ c" K/ K
- state.f.close();0 V" \0 f6 ~* j, V
- }( [# E- h4 r+ e3 N
- 6 z: ^! V+ L( ?& T3 U, i9 P
- function setComp(g, value) {' q! e* o6 M. `0 R' C6 g
- g.setComposite(AlphaComposite.SrcOver.derive(value));
" ?" x4 Y3 K0 d. x - }
复制代码 * W7 H1 p9 l. r$ f. l% A2 `9 K& l
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)' C6 @/ [- [' |. E( j, X2 W$ M I$ I
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