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# [ c5 G; X, n, R2 ~& H: q+ D$ P
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。# }" g; i$ H' _6 v5 P, n1 v
- importPackage (java.lang);
* c( c9 y/ |: W: H/ k - importPackage (java.awt);- t. }" s2 `4 t0 D
) q" C! y' L2 h3 z) Q- include(Resources.id("mtrsteamloco:library/code/face.js"));9 N _& Q" d1 C9 M( }1 J+ Q
- # K- ? b, Q b- }0 k& ^5 l: ]
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
6 m0 `. g: s' m2 J, u
/ ]; x4 \' E; f# z. E) b- function getW(str, font) {
% V, f) o/ c9 L/ D w2 J, K2 b - let frc = Resources.getFontRenderContext();
" z7 T7 j6 O' V& ` - bounds = font.getStringBounds(str, frc);
\6 I9 @9 q, k; L$ J( v7 k - return Math.ceil(bounds.getWidth());
7 Y7 I) G0 W8 V4 S- d& z4 c7 e+ A - }
0 T" o1 Z& e$ ?2 i/ M0 l - 5 o% K4 z5 |5 Q$ Z
- da = (g) => {//底图绘制4 o6 i. i6 t( m8 ^' A
- g.setColor(Color.BLACK);8 R, S) d2 ~# R0 o+ O
- g.fillRect(0, 0, 400, 400);
' w. z8 u- D! u1 G. ^3 [! z$ { - }
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. o6 r x _* `! l! T% R" X1 k4 ]% L9 |- db = (g) => {//上层绘制
' H, v3 I; P9 B; b- S - g.setColor(Color.WHITE);
$ O5 S5 ~$ m/ L) }4 @ U - g.fillRect(0, 0, 400, 400);
( d' P( U8 b' [4 y9 [- t1 ^ - g.setColor(Color.RED);. P) w' _" Z+ r" U# q
- g.setFont(font0);
3 P# R; |% }" X$ h; R6 Q% @, p7 E - let str = "晴纱是男娘";
, i2 c2 N, \' n& @$ o6 H6 Z - let ww = 400;
8 J6 G/ o4 ]. O - let w = getW(str, font0);/ `( [% t+ K. m/ Q
- g.drawString(str, ww / 2 - w / 2, 200);
/ r" z! O. O: H - }' e4 ?: `0 v9 \+ r$ x3 k$ L
- - R$ p8 Q5 r/ @6 i ?
- const mat = new Matrices();
* N+ T' O8 l: W1 a - mat.translate(0, 0.5, 0);9 j/ [# C0 z9 J! y
6 D3 z, `# L% D) ]$ e6 \- function create(ctx, state, entity) {9 P) v' {! D3 c( P0 ^$ P3 Z3 ]2 `
- let info = {$ J# H* o5 a" D- O j
- ctx: ctx,1 n/ Q+ S, D* A. ]* }
- isTrain: false," F$ a, f+ u7 \' u/ c
- matrices: [mat],9 q p- B# c" C( S
- texture: [400, 400],
" W( F% Q4 ~: E, j' {2 Z8 a' K - model: {1 U5 q' D3 J" c) o7 l8 I
- renderType: "light",3 \* v! Q' W2 s" G7 C( V
- size: [1, 1],
! I4 D6 I5 Q' m* } - uvSize: [1, 1]
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- }' w/ G/ K {* z7 k- z
- let f = new Face(info);
+ w8 H5 H+ |$ E - state.f = f;
& w/ L2 |4 E; G8 | - ! x+ C0 B5 F: p
- let t = f.texture;
" c1 U* w! u8 G - let g = t.graphics;1 h9 w- |( Y/ J S! m; S
- state.running = true;
* L9 u) f5 C0 |, E! y, V3 [ _) ` - let fps = 24;5 j4 `! `) ^1 Q
- da(g);//绘制底图
7 U! g( v( p7 B) L3 r/ g" O - t.upload();$ r! ?' p% v5 a8 p
- let k = 0;) o- n7 k t0 ^) H0 q
- let ti = Date.now();
4 v$ A/ k2 b9 L$ B - let rt = 0;
6 A) e8 Y6 K& V/ D9 R - smooth = (k, v) => {// 平滑变化) J- B, S/ s* a- M G3 |
- if (v > k) return k;! U: C. a- I; q( u' r* x2 u
- if (k < 0) return 0;/ @4 m- n* ^$ R9 _0 I. s( D: D# c
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;* q9 c1 ? E# m4 E% V/ r
- }
! T, m& Z$ c' M9 b; @ - run = () => {// 新线程( w4 Y" |1 p9 |
- let id = Thread.currentThread().getId();/ J: W& n' X6 [# i1 d
- print("Thread start:" + id);
6 }* M1 \5 V1 d - while (state.running) {4 i, |6 O, O- A i" `: r9 X
- try {" e/ G# U' Q, ]; p8 w, b& C
- k += (Date.now() - ti) / 1000 * 0.2;8 L) b6 p: \' `0 Z) ?
- ti = Date.now();1 j8 u. {6 |; Q0 Z
- if (k > 1.5) {7 o n1 @0 }' { G) e( C7 @8 D% a
- k = 0;' Z% z. h) p- c9 w
- }
2 p. o/ ~& `% A0 K' s* E - setComp(g, 1);
( R) P( y; d/ p% y; N+ e7 g+ n - da(g);% X7 L; f8 ]1 I2 q3 y
- let kk = smooth(1, k);//平滑切换透明度2 j& Y8 B9 m% Y# L
- setComp(g, kk);
! f& C) J" b; v V# L% @# |2 j3 V - db(g);, {. \. m! y. `% f! s
- t.upload();5 p# @: X5 f2 c4 G
- ctx.setDebugInfo("rt" ,Date.now() - ti);
8 L, o' }' U8 l# I - ctx.setDebugInfo("k", k);
. @" _, S/ \2 x" V' x1 D' z - ctx.setDebugInfo("sm", kk);
. L1 H7 l5 l% N( T - rt = Date.now() - ti;
& ?" I+ E h' ^5 K - Thread.sleep(ck(rt - 1000 / fps));
: ]. @ Z* H/ N! c" Z - ctx.setDebugInfo("error", 0)
* { W9 o) z" q- V3 Q- w - } catch (e) {* j# R7 a' R' z4 e1 f1 s
- ctx.setDebugInfo("error", e);2 Y1 H! u& K+ f2 G& g
- }7 G3 S! M. S" \' q( S% D, [' r& V
- }
0 M' U, q* }3 z# V, T# y/ Q4 l* W - print("Thread end:" + id);, B! q) g! O8 z5 ]! s% n$ y
- }
8 ~& y2 Y3 e, e% k$ P! Q - let th = new Thread(run, "qiehuan");5 w) T: D% U* T2 u- k4 s8 N
- th.start();
2 ~5 G' T1 @ D% w - }6 C* S. c* J9 J
- $ @5 M5 R' x7 h
- function render(ctx, state, entity) {. y$ d+ m4 n$ d+ @$ G
- state.f.tick();
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- ( N3 A' C7 r( v- n" m
- function dispose(ctx, state, entity) {; X0 e2 t( E( Y: b$ O3 u6 ~
- print("Dispose");
4 W- o- v, k# f6 Z - state.running = false;
" _+ P2 T& ^. O% c2 Z - state.f.close();, Y7 P$ N% y k9 ^$ ?/ G5 t6 c& Q
- }$ S8 ]& N @& M3 V& C4 u
: w- V& X p9 G3 e( Q# j; i- function setComp(g, value) {/ T' W) _& Y( n% y
- g.setComposite(AlphaComposite.SrcOver.derive(value));
7 [- s" X! P* i/ a8 f% v - }
复制代码 ; Q _) ?4 |2 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。* s1 U- w/ s6 N7 J
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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)) e j+ q( X" I+ y
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