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. K( ?# E" S4 H" r' L" [7 I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。
7 K' e8 B, S- Q" V; a0 m# F- importPackage (java.lang);
% l3 D6 x4 u, @ - importPackage (java.awt);
6 I+ r, z- N$ [! [
) w" {' |5 ] C7 e5 M- include(Resources.id("mtrsteamloco:library/code/face.js"));- w+ C0 b: x1 A% T4 l
- $ i( K1 R' I+ _5 H+ Q9 m Q
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
: T4 X0 n* g) K. e! [ - * U& R) W& b# ~# v/ b( b1 U
- function getW(str, font) {
/ k" i5 m( w K$ O - let frc = Resources.getFontRenderContext();
; V& B. T K% }1 n4 X - bounds = font.getStringBounds(str, frc);3 p+ A, z. ^5 V% p' x' v n' x
- return Math.ceil(bounds.getWidth());
6 ^/ {6 D3 @) `4 P X1 b) f n - }* G% @, d2 X: y! S+ r S
8 Q" ]' p' R" c- da = (g) => {//底图绘制% Z$ T7 z4 V% s3 S; Z2 k( u! s T
- g.setColor(Color.BLACK);4 b. M8 H5 u1 f+ o8 g. n9 q W0 ]
- g.fillRect(0, 0, 400, 400);5 |+ B0 U/ S% F% \
- }
$ D6 @. I* u5 {/ ], I - 3 V; ]/ y6 h( e3 \" L# m/ }
- db = (g) => {//上层绘制# k2 ]" }' x; i; D& G' M
- g.setColor(Color.WHITE);
6 {- t" I8 J+ w. p/ N9 c" U7 x - g.fillRect(0, 0, 400, 400);
: _ c' ]0 f, v - g.setColor(Color.RED);
8 F) H2 v2 p7 d - g.setFont(font0);
% t: a' g' h& t' {! W - let str = "晴纱是男娘";
- s% w! ?# e3 e$ s' q3 F. A$ I7 b6 B1 ` - let ww = 400;
c6 q+ A$ j. C - let w = getW(str, font0);+ I+ N5 e' b7 U" I0 a
- g.drawString(str, ww / 2 - w / 2, 200);3 U# M- n$ j2 G
- }
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- const mat = new Matrices();
/ Y8 w% h4 }% d7 c7 ^/ J - mat.translate(0, 0.5, 0);6 A+ s( b8 L/ G
! Y* \4 [* o- Z5 C/ ?- function create(ctx, state, entity) {8 j3 B3 t! q% N8 _. p- ?! _% r5 e
- let info = {( C9 I( w4 J5 J" k1 e
- ctx: ctx,
7 i5 O* }& i k - isTrain: false,% V5 m; O! Q0 Y; |+ ?- w. H$ p
- matrices: [mat], u1 i4 M8 g( t
- texture: [400, 400],
& E' x: u3 i5 A% h - model: {' H- n7 s- {+ _7 ]9 A: n o
- renderType: "light",( L$ @8 ]! b! V, E
- size: [1, 1],
5 j) i! f' ~# O; j - uvSize: [1, 1]) X$ r3 R$ e" r# w2 o
- }8 B2 I" N% X; M4 F0 V, C
- }- R, N d6 r* f0 k' ~
- let f = new Face(info);3 f E, @2 ]4 s8 o) P; P
- state.f = f;
$ ?$ W5 f, u3 A3 e/ j - 8 A" E; }3 ~/ I1 e- I
- let t = f.texture;
) L& _' ]' a8 i( Y/ K7 a - let g = t.graphics;* ?: J% R; n ?/ z
- state.running = true;
1 r. q+ |, s2 q: n# Y0 [ - let fps = 24;
+ p- S$ y9 n8 o2 z* ~- G. G: y i - da(g);//绘制底图
' b0 Y, q* v4 R3 } - t.upload();
1 ?8 U; Q& h) M - let k = 0;
& Z5 L/ |2 C: k% U) Y! f - let ti = Date.now();# v7 k8 Q& ^( G- D$ Y6 N, x
- let rt = 0;) i5 r& e- ^' ^( c
- smooth = (k, v) => {// 平滑变化/ n; \9 }0 i4 ]9 @4 G
- if (v > k) return k;3 @; W# C) ]$ l- y+ S' r
- if (k < 0) return 0;
. _) [: }& S. B - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 [4 \, x. E) M, s; z) j% x - }
G+ _) d; k- N- B7 l - run = () => {// 新线程
+ z& J$ L) Z. P; f i$ o7 b - let id = Thread.currentThread().getId();
# ]' k1 N( K. p+ j5 ~/ B - print("Thread start:" + id);) l1 w( _4 Q' N& {- @% B: Q+ U+ p
- while (state.running) {; y7 s9 l+ M4 B: {) j
- try {
& g; Y) a; P" c+ Q2 V. K5 i( Z - k += (Date.now() - ti) / 1000 * 0.2;& @1 e0 ?/ |' E7 l# U
- ti = Date.now();
* t, G/ i* Z+ k {% E2 c - if (k > 1.5) {! J8 B1 b: [2 m$ l7 X* U; s- o) _
- k = 0;
% k9 K5 ~0 N [0 j2 `+ J7 j - }
. t7 G0 L2 _" W4 Y6 a4 _) [ - setComp(g, 1);# ^/ q' r0 ~$ K& T& }3 c
- da(g);
2 V! A, ?6 b8 p& C# o: ^, Z- B - let kk = smooth(1, k);//平滑切换透明度
* Z' V# @$ F8 }0 [4 R$ Y, x6 n - setComp(g, kk);9 K$ p0 S" l9 v( y9 \
- db(g);
( Z& ?( h& p' {. w9 q- |' d - t.upload();
4 U: \1 a5 W. W* f5 r T; r - ctx.setDebugInfo("rt" ,Date.now() - ti);* x2 F; j5 F8 n' T s
- ctx.setDebugInfo("k", k);
6 p. E( O0 S2 l" x$ o - ctx.setDebugInfo("sm", kk);
7 P3 }; I- Q6 w: v4 }0 Q1 [ - rt = Date.now() - ti;4 R5 s) b7 t( D
- Thread.sleep(ck(rt - 1000 / fps));( M/ {4 b) f6 M$ B) J
- ctx.setDebugInfo("error", 0)1 W% _( @) t( M1 `8 h
- } catch (e) {" i; N* F* J$ Q' e: f6 h* l$ X
- ctx.setDebugInfo("error", e);
" Z$ \" C. X1 p5 c1 w3 z; k. z2 O - }
1 |2 e2 ]& I4 k+ z7 A2 m - }
( d! Z3 W/ t+ s0 v0 f6 c% n - print("Thread end:" + id);
/ c/ M# g3 C" Y F1 i; a( H - }
% w- p* g% [0 m - let th = new Thread(run, "qiehuan");
/ T; f& T+ l: s1 a8 [ - th.start();+ }- @2 t7 A& B" z0 d; g& Z8 u2 d
- }4 O: N0 F O1 p5 K2 A
- 3 A. \+ V& G7 P/ L
- function render(ctx, state, entity) {% B) m H9 D& H m3 [8 z- K
- state.f.tick();
Z b, r0 f2 q. b! e) q0 r - }; }" m& |2 }: N$ B7 \4 U
- ; l8 I; W) {8 S4 c% M
- function dispose(ctx, state, entity) {
F- `7 J9 i1 m - print("Dispose");$ L5 B6 S2 S( Z4 v7 J! o
- state.running = false;
& q; y: M% z; W$ y1 G6 w9 @ - state.f.close();
; A+ Y- G5 e8 M! ?' |/ c4 x9 ]( A; j9 D - }
2 ^# b. g* z9 j, H' l
0 v" L# l6 @1 U- V0 D! Y- function setComp(g, value) {3 }7 _) Z* ?8 A( |- k- x
- g.setComposite(AlphaComposite.SrcOver.derive(value));
/ {, J3 k! p) F3 \% k - }
复制代码
" V# k" D/ t: M. 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。
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: G t9 T. l9 n2 {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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