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( E: }5 Y4 E0 r- f+ A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。, C Q3 k3 h4 ?2 h
- importPackage (java.lang);) _% @9 t" K" j
- importPackage (java.awt);
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5 \% h8 r: ~, v& m% w* w- include(Resources.id("mtrsteamloco:library/code/face.js"));. t2 `5 ^0 Y8 u+ ?6 m9 ?% {' Z) M
- 1 R: T: P2 p" N! b( r: L
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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/ P% S8 o( ] w- function getW(str, font) {6 P+ D* ~; p! G- U
- let frc = Resources.getFontRenderContext();
( m( \% q& f" s4 u2 o% X - bounds = font.getStringBounds(str, frc);
7 Q6 ~$ e; I$ N - return Math.ceil(bounds.getWidth());. x/ K: p' `! d! O, S, h
- }
& U- `: r, ^! T1 B! R - $ t+ ^1 k9 Z1 z5 t/ M& t
- da = (g) => {//底图绘制1 v& O7 z3 e6 Z) l' c5 }! u6 }
- g.setColor(Color.BLACK);
" A: {3 P' {" }/ i+ `1 G! M - g.fillRect(0, 0, 400, 400);% j" i' \: M; b% @- A
- } \2 l+ b7 @# b' \
2 L' O; H8 r/ S+ j9 Z- db = (g) => {//上层绘制/ t# z: P+ k% C O
- g.setColor(Color.WHITE);/ `: Y- m1 \$ ~, X1 \" \; T
- g.fillRect(0, 0, 400, 400);
6 t5 ]6 M* W# t% p9 k: x - g.setColor(Color.RED);$ p6 Z- \ X6 S& k$ L8 m
- g.setFont(font0);9 E7 g4 b& a5 [
- let str = "晴纱是男娘";* [: t t0 o. t- y: `/ w' G1 o
- let ww = 400;
1 p5 E1 b! y1 Y' U" U0 | - let w = getW(str, font0);0 {. K) |: R' B* `8 Z
- g.drawString(str, ww / 2 - w / 2, 200);
5 F+ t5 a, E+ k1 ~) G9 A, R - }
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% j& J5 {2 n8 C0 a- k, G2 F- const mat = new Matrices();
' l; c* f. b3 Z6 a4 Z' S1 k) q - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {5 b0 Z! @- J) Y1 g5 e
- let info = {6 `+ s* N- D* F! g
- ctx: ctx,) n, K2 H& f: j
- isTrain: false,
0 k9 A+ U- }! ]# e$ R. D1 s/ R1 a - matrices: [mat],
4 j( [" x) F* j y- `* G - texture: [400, 400],
. X) k+ H4 `/ f7 q7 E - model: {7 i5 B3 j+ k: S# g9 R4 Z
- renderType: "light",: z, J o3 o2 s
- size: [1, 1],
1 M$ s# P1 [/ D! ]9 w8 N3 A( M4 O) t ^6 b - uvSize: [1, 1]! ^* c a- F" \5 X1 T U
- }
- a# S2 Z! P) o' n8 v - }$ @2 M4 k Y0 K6 M+ G: Q
- let f = new Face(info);
9 ?# ]( V9 j5 D( S9 K, \ - state.f = f;
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- let t = f.texture;* y1 g" i4 |+ S$ |" x2 d
- let g = t.graphics;
* m; y( q9 }, n! { - state.running = true;" M( s6 a6 b4 f0 G8 b, M: f- T
- let fps = 24;
0 a) B" C; r3 \6 B7 t, d* v - da(g);//绘制底图
8 e8 e0 o1 y* L - t.upload();
2 ` m c! w) n - let k = 0;. G' V* @' P# u% |" P$ F
- let ti = Date.now();" T+ N# r% d( Y; g
- let rt = 0;
* Q$ t! u4 l+ o; n" x- j - smooth = (k, v) => {// 平滑变化- M$ W6 W I* G
- if (v > k) return k;
' f' i' e- b1 s - if (k < 0) return 0;
, x+ e& W: O, ?" S' g5 v - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
- t+ g& h4 h" {1 }: B2 } _: U - let id = Thread.currentThread().getId();
# W$ z- H* z) p: s. R - print("Thread start:" + id);
- h2 M# f% s. r2 h - while (state.running) {
1 D7 _9 B8 E+ Q$ t, s) [7 B - try {
' w, ]2 B4 I1 M9 M+ b - k += (Date.now() - ti) / 1000 * 0.2;
1 @) C2 \8 l2 v6 L: N. ` S2 A$ a - ti = Date.now();
) ]; @3 T' v! g2 s9 ]( R, [1 n; n - if (k > 1.5) {; n" x+ V& o8 O+ a5 ^# \
- k = 0;
" ~) E8 R0 \% s8 k, q' I0 t - }
1 B# G* T; J" s) M+ {8 |; o - setComp(g, 1);7 m8 d2 U( o' V8 C7 n; d; o! l
- da(g);; O; i- s4 K8 G$ C
- let kk = smooth(1, k);//平滑切换透明度3 f4 X) k8 H% ]" |
- setComp(g, kk);7 F8 T2 r& u/ K- x
- db(g);
a+ m4 }. |1 R2 k+ a( r- x$ F - t.upload();: J) C1 M3 }) C7 _ D7 W* f
- ctx.setDebugInfo("rt" ,Date.now() - ti);6 d G* | I7 x( x0 K$ m
- ctx.setDebugInfo("k", k);
+ i% K6 U3 {& S* M - ctx.setDebugInfo("sm", kk);: V9 ?/ Y: [; F5 w; g2 o
- rt = Date.now() - ti;# u9 n- Y9 A+ Y/ @, q
- Thread.sleep(ck(rt - 1000 / fps));
6 Q5 Y* g9 t& ~# i, C8 |; L0 ^ - ctx.setDebugInfo("error", 0)
9 ^ r7 e- f/ Z7 F% n - } catch (e) {
' \# } b% \8 B8 k8 e - ctx.setDebugInfo("error", e);. {! f9 p/ I5 T1 c8 W
- }" X! @# \, |# a) z* X8 b
- }; ?6 K: {5 \ m5 B
- print("Thread end:" + id);
; i! W( P, M0 v6 h$ b4 { - }
/ d- n+ r1 Q7 [9 W+ v - let th = new Thread(run, "qiehuan");" j. M: w# H0 _- S" K. t
- th.start();
: J3 _. J5 j+ U% P* B2 e - }' P3 U" |6 e C- t9 P6 o1 Q j! m
- # c" {: k6 h: O, }2 R' C1 R
- function render(ctx, state, entity) {
4 B2 b% O3 u" t8 u# Z - state.f.tick();0 p7 ~( ~: [3 e) e# ]
- }
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5 |% t: w2 u9 z" G3 w5 U3 m- function dispose(ctx, state, entity) {8 l' z) i. V2 o) X, t. C) _0 J
- print("Dispose");
6 h- C+ U, A; S$ {- u7 { - state.running = false;
3 B2 [2 q1 H1 N, |( W5 K8 r3 _! L - state.f.close();5 z6 N) j9 a% }8 Y1 W/ n8 k& f& Y. }
- }
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' @& v8 Z0 W! T3 @" D0 `$ s6 k8 D- function setComp(g, value) {4 |, u6 ^0 a/ p* O* `4 r6 k
- g.setComposite(AlphaComposite.SrcOver.derive(value));
1 x; O7 K7 O7 B& `4 a b* D - }
复制代码 2 W0 o2 l8 S- [+ ^. _9 f% ?3 q
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。4 B8 u A; B6 [: ?. ]5 s& v; q+ u! M
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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)% o6 G5 c1 |6 x; k3 ^. j6 A
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