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: w4 @: `' y* n# w/ k0 q' L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。" {. X. U0 P, {$ L
- importPackage (java.lang);5 [) O1 x1 A1 m" n S$ B5 ?
- importPackage (java.awt);, L M, U( i" w/ |# ^
x! A7 D- S! X+ e- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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0 Y% r0 g" r4 w3 N( I( c- function getW(str, font) {
3 [8 B$ G7 k4 a8 h/ e& a - let frc = Resources.getFontRenderContext();
- C# `6 L: ~- P - bounds = font.getStringBounds(str, frc);
2 y7 p5 B: z: Q; G% V - return Math.ceil(bounds.getWidth());
" B4 d/ F' D! L; s4 P - }
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! ?. S( Y# W: {! y6 x# P% v/ J1 J, y- da = (g) => {//底图绘制7 A: c7 v" B0 X& }
- g.setColor(Color.BLACK);
0 @9 `' m6 k7 b+ g0 V% P4 N, p - g.fillRect(0, 0, 400, 400);
: z: H/ j1 ~% d! w7 y0 M& L$ L ~! P - }
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- db = (g) => {//上层绘制
, L/ N( ]* w( [3 o8 k4 G! D - g.setColor(Color.WHITE);
" Y- K2 z! } z' r - g.fillRect(0, 0, 400, 400);" ]# K9 H8 J4 _, b+ K+ }
- g.setColor(Color.RED);( N' Y: n. x- m0 n. _! [
- g.setFont(font0);
9 Z; S( E* ^9 `' f1 m - let str = "晴纱是男娘";
n' ~* V) d! O - let ww = 400;
8 B0 c z6 {0 ]2 L% g - let w = getW(str, font0);! o% O( J. W: R; e3 v7 k5 s1 v+ v* W
- g.drawString(str, ww / 2 - w / 2, 200);6 `6 s1 k; w p2 K
- }
# i- ^& A- u7 D& v' M$ ?: j - + r- M% c3 J3 u& J) L7 U
- const mat = new Matrices();
0 z8 }9 K* E. C- y& h9 m% h - mat.translate(0, 0.5, 0);
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6 N- R9 V! Z7 [" X N- function create(ctx, state, entity) {; m1 m7 q9 i8 U- I9 S' z
- let info = {2 _) a) Q. m; x& I% F% H) j
- ctx: ctx,
: K2 g2 z$ Q$ K) B$ _ - isTrain: false,
1 u3 U p! ?! C# }: | o* [ - matrices: [mat],* Y( T; J! ~% j6 G Q& I- c
- texture: [400, 400],
" u3 c' f/ K. A8 O - model: {
, f' L7 t. L+ t$ { - renderType: "light",. z8 k+ L: P" D5 x& Q
- size: [1, 1],
+ R7 o$ n/ o K9 E. h/ x - uvSize: [1, 1]
8 t, ^6 n6 `$ e - }
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- let f = new Face(info);9 x9 V U( |( y; Z- V( Z
- state.f = f;& ?/ t8 l: G( P/ E( y4 k
) [* P/ L5 }7 M- let t = f.texture;
l# _4 H) ^' U$ Z5 s! B9 W4 t( I6 b - let g = t.graphics;
% H) S/ D6 N6 A4 T - state.running = true;
. K, k8 E! C/ [7 m5 C0 N0 I8 Q - let fps = 24;% I; x) Y; l' A: c/ T$ l9 H/ E' W
- da(g);//绘制底图
- {+ [1 B. g5 K) O. [ - t.upload();
0 m+ \' S3 k+ ? - let k = 0;5 i/ C( y& u3 R/ c' E* k
- let ti = Date.now();
8 t" [, n) M( v, Y- T1 ? - let rt = 0;
+ d4 ?2 B1 {/ \+ U3 ~ - smooth = (k, v) => {// 平滑变化# e/ p7 G4 b! U* V. q7 W4 y
- if (v > k) return k;
3 Q, _7 P$ K9 d( o: _. Y. U; V - if (k < 0) return 0;7 M& L3 ]4 u' H6 Z C. N
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
% ^* l8 x3 \# Z0 A6 d - let id = Thread.currentThread().getId();4 }9 I8 w* r- m5 _8 k, Q& b1 |
- print("Thread start:" + id);
4 g1 T3 ]; s, K, k - while (state.running) {9 \2 X0 h4 U' c/ k3 A
- try {( @8 R/ Y k! [* a
- k += (Date.now() - ti) / 1000 * 0.2;
( W3 Q$ Q3 r/ v8 S& L: U - ti = Date.now();
) `& @& G9 Q+ i! M+ k - if (k > 1.5) {5 b$ n$ ^2 ~1 C* y4 Q3 i
- k = 0;. O& N. V" \0 Z; ]5 @
- }
6 G* q7 F; q; {1 N - setComp(g, 1);
7 e1 _0 i6 d. D c- o - da(g);
7 Y% P( y5 z3 h0 l! V& ^ - let kk = smooth(1, k);//平滑切换透明度
; S X0 z9 j7 g% G, j a/ C0 N1 G - setComp(g, kk);% I2 ? J) E+ v0 U. \8 \- e
- db(g);, A' P' d2 H% m
- t.upload();. f6 g( P5 z5 y. B
- ctx.setDebugInfo("rt" ,Date.now() - ti);& C, Z2 L. N* @# C
- ctx.setDebugInfo("k", k);* d3 n4 I- b. h+ K& \: ^* f, e
- ctx.setDebugInfo("sm", kk);7 d$ K0 @: n/ B7 ~4 [* s
- rt = Date.now() - ti;! Q' Z8 t/ x3 [0 T3 a
- Thread.sleep(ck(rt - 1000 / fps));
: e: R2 u+ s3 z - ctx.setDebugInfo("error", 0)/ j5 {9 v {. D+ H
- } catch (e) {' @ C" a& [' n$ h- P
- ctx.setDebugInfo("error", e);
" x& U! |5 ]( T - }
" J9 v. A3 q, D* B" V8 l0 x - }- o( |# s8 b% q+ D' D% j
- print("Thread end:" + id);. j B* |5 ^" U* v/ S F
- }
: _4 g0 o0 ~% w M - let th = new Thread(run, "qiehuan");
0 n2 q2 ]1 Q M* l7 }$ I - th.start();2 V; @# D( o& {7 E1 b
- }/ i' V5 l/ N) r0 I7 l
& I$ V/ r4 x2 g' a1 Q/ Y8 T- function render(ctx, state, entity) {8 a8 v* `( E- |5 X. N8 l* C
- state.f.tick(); S: S1 e: H c5 e1 Q0 U5 H
- }
" L7 i1 E r+ R, E( `
3 U. n# s4 N) G( ~+ Y- function dispose(ctx, state, entity) {8 f1 U) v* e5 W
- print("Dispose");6 X) T7 M9 o/ W$ i. \' t
- state.running = false;3 _# v( W9 d, I+ W: B6 e. k9 W
- state.f.close(); i1 h- Z5 h" ?2 v c
- }
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0 }. b% r2 W: W8 _/ U1 o! k& U/ S- function setComp(g, value) {: T$ ]1 G/ \) c: I0 b w( D
- g.setComposite(AlphaComposite.SrcOver.derive(value));
( Z, A6 k- k! K8 W - }
复制代码 : y! C% D4 R: E% N5 i( ]
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。7 x; g3 S' g% ~# Q- } `" a
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8 `# i: b6 S% w' Y, l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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