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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。, t# e4 m0 F- S l2 S
- importPackage (java.lang); n* t3 E# E8 [- a
- importPackage (java.awt);8 A% p/ w# g+ n0 d
F, x3 D3 z8 H# ~; `- include(Resources.id("mtrsteamloco:library/code/face.js"));7 h/ M# r# p) \9 c
- j' h0 H6 }0 m% ? S6 {! h- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);1 K- i: G! [5 \0 S( z/ I- j5 J
- ) K/ q& }( @9 h9 d: Q, w. Q8 s3 d
- function getW(str, font) {
, a' r* O, K/ F+ i0 G - let frc = Resources.getFontRenderContext();
5 p. x2 E9 a8 j% B* G - bounds = font.getStringBounds(str, frc);
. J1 x5 F9 P$ g/ t - return Math.ceil(bounds.getWidth());
/ \& ^. @! Q# ]4 K7 e2 w, b - }3 Z2 v, x* R0 G8 {% s
B% z Q% _" e- }3 y1 V" r) W- da = (g) => {//底图绘制
" O! x+ \; n% n t- Y( V - g.setColor(Color.BLACK);. v; \' g7 c5 g- t# N* s: `6 |/ ~
- g.fillRect(0, 0, 400, 400);
; Y( a3 ~; I/ s - }; S" b& L# ^* ]2 ^
- . |- @# N3 J1 [9 a( r
- db = (g) => {//上层绘制
3 ^' H8 W' K3 h8 S* T - g.setColor(Color.WHITE);, F/ T/ Z( V: m% i: S
- g.fillRect(0, 0, 400, 400);! ~3 Y8 B: L' J) G/ H
- g.setColor(Color.RED);
+ s1 x4 |) ^& U9 W - g.setFont(font0);$ a! T* p v' Y: u) \0 V
- let str = "晴纱是男娘";
4 m) l! ]/ G K; L - let ww = 400;. `) } X7 r9 ^" Y
- let w = getW(str, font0);
- c# J9 L' l+ t4 K$ {+ q - g.drawString(str, ww / 2 - w / 2, 200);: [; J Q/ C5 v$ v, B' s( [0 Y
- }9 f- K" h" u' w: z
" f, b3 [$ ~- u6 m, c" _" y T A- const mat = new Matrices();6 |+ C% B* E/ K/ H& h# {
- mat.translate(0, 0.5, 0);/ `) `, x6 ~ T5 V: y6 x w! o: t
- % b3 x' y2 E" E- M& {
- function create(ctx, state, entity) {
. N9 {% F) T# i3 m+ A - let info = {
6 T5 U6 b# k1 ]5 @ - ctx: ctx,, p" W+ s& J( Q1 ~' O
- isTrain: false,
0 c. s+ I- u8 V# A0 ~+ B4 Z7 o - matrices: [mat],
7 ~; X% _7 D' V% \ - texture: [400, 400], q# k7 }* _8 J# ]7 F9 T. l- E+ Z9 H
- model: {: b- h* W6 Z6 h2 M$ x; ~7 l
- renderType: "light",
0 ]; d( q: K D - size: [1, 1],
M0 a/ _# F* T- G0 a" h3 X7 u - uvSize: [1, 1]
. j% g$ k8 A: Z) Z- A - }5 y* b* o' w$ }& K
- }
# c& W( T7 s% i - let f = new Face(info);0 u8 O8 ?% B* S A9 ?: T
- state.f = f;. c2 f F! Y* a# ^
- 6 X, @4 b3 r$ r4 G+ p6 ?
- let t = f.texture;6 W4 x' x5 [0 D2 W! T! M0 D* |% X+ j
- let g = t.graphics;$ g! O6 J R2 k
- state.running = true;' i3 ]* d/ \8 r+ H# \) Z
- let fps = 24;
5 e* Z, I9 v" Z/ n* j3 D - da(g);//绘制底图; h: w5 H1 L0 X4 Z6 I. S9 B" P
- t.upload();/ |: L1 X# p8 v3 j3 @
- let k = 0;
/ O; L" |. C; t J- w3 u2 P4 G - let ti = Date.now();
# m0 Z0 [$ r2 x - let rt = 0;
3 j& t4 P/ J4 d - smooth = (k, v) => {// 平滑变化5 P* c2 c% ^- n: N
- if (v > k) return k;: K3 }& t% D3 ]% @8 g( F
- if (k < 0) return 0;$ n) V6 K1 }1 }# f1 a" M
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
3 G1 p3 Y1 i/ `: X( `# _ - }
. u# G! U6 N( A - run = () => {// 新线程
h1 |2 K% J) E5 P2 ]" I% ]* J" L - let id = Thread.currentThread().getId();3 G, e( ?/ d' I7 W# {
- print("Thread start:" + id);! O/ A+ C4 M: j" V9 B8 ^ s' L
- while (state.running) {$ ^" v' P2 t$ k* f. S9 F$ a5 ~- x) Q
- try { K6 Y) V! q1 q% r6 O
- k += (Date.now() - ti) / 1000 * 0.2;
+ m% b4 d( u4 E8 k. T$ J - ti = Date.now();
1 K* y4 B1 u( ~/ P8 E7 e/ V9 _ - if (k > 1.5) {
& x# o0 J" t( p! U6 T - k = 0;
% a; {, l5 A. Z; } - }) A& f0 U) ? d. Z4 w- c% v
- setComp(g, 1);
7 ~, m+ v/ Q% a! { - da(g);: a. \0 l& x$ T9 z, X
- let kk = smooth(1, k);//平滑切换透明度
6 Z% H3 H& d, l( x1 E4 g! H& Q- P* Z - setComp(g, kk);9 V( Z: [( D w- u
- db(g);
* `1 z+ z: \& p6 F) v; [) r+ A B - t.upload();7 Y" E9 m9 O# L1 A
- ctx.setDebugInfo("rt" ,Date.now() - ti);
) o7 ]- k5 U7 J3 h8 i4 ] - ctx.setDebugInfo("k", k);
3 s9 Z- m. ?% M' t, ^3 x - ctx.setDebugInfo("sm", kk);
( M" B' b( f" w. Y - rt = Date.now() - ti;
8 P6 Y1 F. h6 b2 f - Thread.sleep(ck(rt - 1000 / fps));. w3 t3 J1 V" q" R5 d M" ^8 [ ~
- ctx.setDebugInfo("error", 0)
4 F3 H% u7 v* r - } catch (e) {4 o7 X) j. a, o# _7 K
- ctx.setDebugInfo("error", e);
: e& G* G6 Y+ j! [) b$ ]; D - }
$ e5 Y1 \3 f8 Y4 Y% v - }
. p; E/ C7 T2 _ - print("Thread end:" + id);
+ B7 ?2 v# D0 A - }
5 E+ _" o9 ~. j% h - let th = new Thread(run, "qiehuan");3 z! x- I: K2 R) L! U) x+ h! P' D
- th.start();' j6 {8 p9 R# _; x
- }
5 K% ?* s& g8 i
. h# w$ m! n3 r. d0 g7 o- function render(ctx, state, entity) {
* u- r* Y- [7 ~/ } - state.f.tick();+ [3 E1 N# |2 z! K& a
- }
$ j/ X+ j9 ]. \$ ~# { - 4 }, e$ R+ ]1 j0 L2 z0 R
- function dispose(ctx, state, entity) {. X- H6 k0 L5 `2 }) f/ [
- print("Dispose");
( |# H7 M) l+ N* h6 Z - state.running = false;
* j. K1 |# x$ J0 V) Y - state.f.close();
& k7 H" F1 e) {; b3 X - }
+ [8 j+ V6 ~! j: e! W0 _7 q - ; V2 T% P5 m4 G& v0 j
- function setComp(g, value) {. t0 i7 R2 G3 [; A
- g.setComposite(AlphaComposite.SrcOver.derive(value));
; L3 W5 N2 y* [% ] - }
复制代码 + @+ s3 c8 \/ [ C. y2 S, 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)
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