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; n' L/ K! L) m- P S; X, u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。0 f) o% ~2 i. ]
- importPackage (java.lang);4 {0 w" V) `2 R* t
- importPackage (java.awt);
- o1 }. o( I6 {% J- w8 H - ' }1 g# P: |9 A6 E; J3 \' U. Z
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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; c: s Q) q; T* n" H- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {3 Q( @% t' x; @
- let frc = Resources.getFontRenderContext();9 q' K, ` Y) q# Y% I
- bounds = font.getStringBounds(str, frc);; `4 Z/ a* ~0 D3 E- g
- return Math.ceil(bounds.getWidth());
$ d' H" }: n5 d% u - }
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7 f9 L- U" e( _5 X- da = (g) => {//底图绘制+ q4 Q- U5 x5 G& A$ L1 U$ c
- g.setColor(Color.BLACK);4 B5 @" J9 r5 X" @
- g.fillRect(0, 0, 400, 400);
# @2 K+ J& a5 j - }1 `' n* ]# p" K6 y5 P, p
7 O5 Q6 h" e5 a( P, N* E- db = (g) => {//上层绘制0 H( v \' g5 [" U6 Y& w" J! C
- g.setColor(Color.WHITE);% @/ K- a. g. d" F, n
- g.fillRect(0, 0, 400, 400);+ H% C5 L1 Q6 p9 A, i! _8 y
- g.setColor(Color.RED);% E0 {6 l+ x& M( I" g7 {
- g.setFont(font0);
* Y, Z2 g( G% L3 l6 Y2 S5 Z! ^ - let str = "晴纱是男娘";3 V/ |7 y; `2 \. _: Q; N
- let ww = 400;4 {% n' `3 O2 j, x
- let w = getW(str, font0); ~ @* M) J" C; q# u3 }7 s
- g.drawString(str, ww / 2 - w / 2, 200);
0 `' H4 `8 `3 Y! A9 A - }
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- const mat = new Matrices();. H! D# Q" U% v/ @: G* p$ H+ |
- mat.translate(0, 0.5, 0);5 f8 p2 e e4 t) O' ^, k/ a F4 G& _
- . B6 v( o$ N9 o* K5 X2 ~' S/ h
- function create(ctx, state, entity) {! ~( v6 x7 n! }) m2 w3 v4 i+ F& M
- let info = {
; a" C" G: _* _ - ctx: ctx,$ O' H. y+ a* q8 g: j1 G
- isTrain: false,. a! p2 B) ]( `$ ?- _
- matrices: [mat],
! U B6 ^* \) j8 i6 g - texture: [400, 400],
) V. b( s& n( ~' p: C - model: {6 q* ~% C( W0 H# d
- renderType: "light",
1 g, d3 y% p; q. ~3 n8 y, m - size: [1, 1],
Z' [) a3 ^& | - uvSize: [1, 1]
7 z* s$ Z+ ?' s9 V0 j1 c+ E - }
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- let f = new Face(info);
5 I& H: |6 y) ^! _& D - state.f = f;4 m& {' z ]# j9 L# f
- * M: S" B8 f d: |
- let t = f.texture;2 {& D, [/ Y2 m* K7 P) h! B
- let g = t.graphics;
1 ~7 i- W! U N - state.running = true;
2 r% ^9 A0 g0 |' Z7 k4 t) A& g5 L - let fps = 24;
" a8 ]0 G/ o* P" q% Y1 ]5 m - da(g);//绘制底图. D) j5 X/ h' C' b+ f
- t.upload();, R1 Y ~% L3 }4 h2 V
- let k = 0;
# B7 h$ j1 u3 E - let ti = Date.now();
# n3 e4 m' F- |' L - let rt = 0;" P1 x. A k! _: C3 ^; a5 {, Y
- smooth = (k, v) => {// 平滑变化+ Y% o) m/ S% \! e# z% F
- if (v > k) return k;
7 `& I0 O! J1 E9 z - if (k < 0) return 0;
0 Q9 b9 |- D# e" P. l B8 B; V - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
8 i2 r \8 i. K& w/ g, Y L! Z - }
3 R' z5 b- n2 r' A - run = () => {// 新线程
, G S. H d+ L* j; [5 u. f& ` - let id = Thread.currentThread().getId();4 `2 W, \7 v, ?$ z1 }2 k
- print("Thread start:" + id);
' e1 z- o# d' m1 P1 p& P; E0 ~ - while (state.running) {# _9 g* r( d* P, Q. ^4 N
- try {% F y$ B B4 D4 E# N) B* A1 I6 G
- k += (Date.now() - ti) / 1000 * 0.2;
9 O4 i2 P; E# W9 |5 H0 e - ti = Date.now();
* B1 u; o. l0 [. }8 Y% N - if (k > 1.5) {
: i; E; ^8 Z% R q4 v - k = 0;/ Q( U! X& n2 t) F/ P" v4 S+ ^! j
- }( i. l8 x5 V& B2 R
- setComp(g, 1);3 K; r# }; c5 o& o& |8 v2 Z- i# J
- da(g);- m; x* E% I+ _# v2 ]. [
- let kk = smooth(1, k);//平滑切换透明度
0 U' e8 W$ t8 z - setComp(g, kk);! P. g* a0 Z( k5 |8 u4 O
- db(g);
D; l+ x9 g& L# T0 ~ - t.upload();1 W" u: Y) ]+ h. I7 P/ k
- ctx.setDebugInfo("rt" ,Date.now() - ti);
4 D! H+ N/ e t* A S w( t - ctx.setDebugInfo("k", k);
y# l/ n* }) |+ { - ctx.setDebugInfo("sm", kk);% c6 ^. J8 i3 m- y0 A. ^( j8 C
- rt = Date.now() - ti;
A s: x3 `0 C- r" i+ Z - Thread.sleep(ck(rt - 1000 / fps));
v i9 J2 R; C3 c. g x - ctx.setDebugInfo("error", 0)8 D* _6 X% ?* |% V2 w
- } catch (e) {
: B* E# E1 f* N+ A9 \ k4 s - ctx.setDebugInfo("error", e);+ }! H* |+ Q% D. M$ ^
- }
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- print("Thread end:" + id);
) d" Q" [( G( z3 e' D1 J/ q - }
; {# _* T: L# ?& N. U - let th = new Thread(run, "qiehuan");
& {3 D6 D r" c! }3 H9 f5 c4 H - th.start();
; i( ]6 ]( {' B$ Q6 Y! u; p - }
3 Q' g- F& I% ^' R - , Z( K9 I8 o) q3 S
- function render(ctx, state, entity) {7 K# G9 R# u, C
- state.f.tick();
1 y4 F- u8 f" u# e$ @: Y% V& D - }
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- function dispose(ctx, state, entity) {6 {- k1 P9 W' V+ x u/ i
- print("Dispose");* Y8 [- X* G) l! X `
- state.running = false;
6 ^1 b8 F: |; Z$ C* j - state.f.close();
! e+ L% `1 \' ^. F - }* m5 {4 e4 I9 Q# n7 ?" |
- ( p2 d3 W0 C5 a
- function setComp(g, value) {
: @6 n/ C$ K5 G& F( a% J. F: `& F - g.setComposite(AlphaComposite.SrcOver.derive(value));$ Y. s2 Z1 O7 H; v3 ~* o7 L
- }
复制代码
* f, B3 Z- v, h0 [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。5 \, h* h \8 ^0 ?: n7 I8 Y8 R
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, Y9 I7 {* A; e1 O& S, v顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)* W2 p' l: O. M1 i, H! q
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