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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。 s; A$ N- G1 s% l: @* T& N
- importPackage (java.lang);( e( |8 B5 d2 ]( P7 W
- importPackage (java.awt);, E6 Q( g% {$ |5 T: s) | T) r
4 |# p, Y3 Y* {; Z X2 y8 | c, O- 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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: d2 q6 i8 \# T- function getW(str, font) {6 Y% d: Q* I7 r, q! \+ j1 n. y
- let frc = Resources.getFontRenderContext();
( s- Q/ M! B: j% D' e - bounds = font.getStringBounds(str, frc);( C; ^6 v) U# x; B7 E
- return Math.ceil(bounds.getWidth());
7 ? |5 @! G4 Y* W - }
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- da = (g) => {//底图绘制7 ~; w2 r6 L1 r* P
- g.setColor(Color.BLACK);% v7 b6 {* S# c/ O: `# u
- g.fillRect(0, 0, 400, 400);4 H% Y& K* E" a; X) d, X
- }
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- db = (g) => {//上层绘制' B: K- M6 B8 p+ P6 [' e% Y
- g.setColor(Color.WHITE);( q8 @- G3 Z" F9 j$ h+ k+ j
- g.fillRect(0, 0, 400, 400);
" B, @2 C( U$ Z8 V - g.setColor(Color.RED);
/ @8 @( D9 e% t) ~. U - g.setFont(font0);
+ x }+ ~2 \* B% i$ @3 p$ P' F- | - let str = "晴纱是男娘";3 v5 h* k: {( j( @( A8 l
- let ww = 400;
5 G* j, q# s) o/ n) D& G - let w = getW(str, font0);% p- o$ R3 }1 T; O I% p
- g.drawString(str, ww / 2 - w / 2, 200);" {: t3 i9 i/ I8 D$ B( g
- }
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* t& C$ ]1 n1 b S0 B- const mat = new Matrices();
2 b5 | k) A! O' Y8 L; D - mat.translate(0, 0.5, 0);. Y, I9 P m$ J. d( c! X
6 w: n9 z2 C6 Q6 l+ v. K& `- function create(ctx, state, entity) {" _. C( u2 |9 b& w. x
- let info = {! D( U ]" r4 x! }6 H; C$ T
- ctx: ctx,4 U! ^ F; |8 a
- isTrain: false,+ Y; k& U0 e$ N
- matrices: [mat],
/ c; n9 [, j# I- J8 G9 A+ T4 ]- f) l - texture: [400, 400],
6 @) [* I' Q1 }; [# ? - model: {
. r& X& w9 H0 G& K, Y7 N' F - renderType: "light",
: p8 C% z8 Y4 e4 H( B) N! q6 M - size: [1, 1],1 u3 O( L/ @% R! @6 E
- uvSize: [1, 1]
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- let f = new Face(info);
2 g* m3 `' ?7 ^. I& C! w - state.f = f;5 T+ M4 P$ f* O3 z, R# d! y" r) m
- : m& ~& b+ j, z7 K! f7 v) }, m
- let t = f.texture;
, n5 u. M: J1 V" E9 m - let g = t.graphics;0 h& \! c* |6 g; c- b( P7 w1 Y
- state.running = true;
6 p: T: @1 Q! v* x. `# v! n M - let fps = 24;
- D' |: j# `* b, u7 a - da(g);//绘制底图+ j6 X& @% e8 M
- t.upload();; {# N9 q+ c; D) p& g
- let k = 0;
$ d- K" \- e, E8 p# e# J1 y - let ti = Date.now();+ G. q# J( M( N
- let rt = 0;
0 \4 W) j9 P E* ^% b3 i% | - smooth = (k, v) => {// 平滑变化
" c( j) \- @0 |5 j% N) f( g) B4 U - if (v > k) return k;4 x6 S) T; p, F
- if (k < 0) return 0;1 j& p' H5 a& y- c9 [2 h9 l
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; s/ O7 ~8 e) i8 K# ~. @6 ^' F
- }
7 f2 H9 n3 {; s9 ~ - run = () => {// 新线程' i; q, G! T* q3 F3 o9 _& V
- let id = Thread.currentThread().getId();. H% O& f& V" E# m
- print("Thread start:" + id);& {# s9 q- q+ j
- while (state.running) {# F) z- C3 C& Q% k
- try { G4 n+ J" b* p# N, L! l. J
- k += (Date.now() - ti) / 1000 * 0.2;
& a4 h' ~0 l" |$ O - ti = Date.now();' h7 Q5 ^% T5 z/ i+ g5 }
- if (k > 1.5) {! o' L% v( H6 e! W1 p: o9 @
- k = 0;
/ S- b0 K; \! z! \# ? - }
' r; o: ~# [. W7 E- I. y - setComp(g, 1);
1 Q5 r5 h" ^# y! |& V. n& V. h$ C - da(g);
9 d+ e8 f6 d1 ]; \+ h& [ - let kk = smooth(1, k);//平滑切换透明度
$ A# K5 }) w. m4 a3 y& F5 } - setComp(g, kk);) C5 @ s- F( u0 l8 C X: U
- db(g);
- H" _- F' E0 k0 q5 I - t.upload();$ _" n5 W% Q: p$ Y8 e; R+ m
- ctx.setDebugInfo("rt" ,Date.now() - ti);5 f1 ?' N5 T" T ~& i( l2 ]" x- V! R
- ctx.setDebugInfo("k", k);) p y$ R( ~% x
- ctx.setDebugInfo("sm", kk);
: i: U( a, ^/ n/ \0 Q! u# \! C' K - rt = Date.now() - ti;3 T8 Q: S( e+ ], K, E
- Thread.sleep(ck(rt - 1000 / fps));
4 p( H1 X7 q) A2 S6 L f! Q* [ - ctx.setDebugInfo("error", 0)
; q1 a' L% n4 V( ^- V* W# S( m - } catch (e) {
& n7 [5 x' y( V. A! S6 n, T/ A - ctx.setDebugInfo("error", e);
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- }
; J, x/ D4 Y( E- k, J+ i1 e2 } - print("Thread end:" + id);
1 N0 U+ @, o- V4 m - }
1 J# @: ~7 c% q# W( a - let th = new Thread(run, "qiehuan");4 l/ X9 b9 ]9 P/ p/ J' |0 A7 h
- th.start();
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: f5 S3 h" _4 I/ ]0 l. E- function render(ctx, state, entity) {- Q+ U6 @, O1 R( M" K, }+ h/ i
- state.f.tick();2 \0 M* ?. ^( M1 K/ M( m# a
- }& ^: I5 ]; n% y' u6 Y% s
- 9 p" ?* k; _; O* M- @
- function dispose(ctx, state, entity) {
$ a5 s& X* i( S5 V5 X v( Z - print("Dispose");
5 m& i4 h0 I2 @& e4 y t& y! i - state.running = false;' k' _0 s& \) E2 j- I+ D2 }; L
- state.f.close();: v/ l* p" Z7 k" n3 J
- }2 d/ c( a+ D( n2 o) P4 T. r2 J
! V& X. n: z% U- ^8 B8 A. A- function setComp(g, value) {
- \( J6 G: ^+ x. U - g.setComposite(AlphaComposite.SrcOver.derive(value));8 T: B: p$ X: \
- }
复制代码 3 Y7 U0 v5 s* ^) P3 B% x/ C% d4 y
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。1 K9 U! q7 _( _
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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)8 a) K. f0 j, Z' E3 t
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