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9 R* y" h! \: v. `* i7 Q2 K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 [5 n9 q8 ~2 l% F5 @
- importPackage (java.lang);# u7 y5 ? X5 Z$ T! I
- importPackage (java.awt);' M+ |7 w& x$ h; q7 a
- ' m! Q9 [$ r8 i: \5 D2 b
- include(Resources.id("mtrsteamloco:library/code/face.js"));1 Y: d: [! Y9 E* G4 ?7 w
# y" i5 j/ U) j& y) X- J! h" Y5 M- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);- ?) q v- p. V4 A0 k* O' A
Y1 r2 y7 y- y! {: w J+ I- function getW(str, font) { C# x, q) a- D6 ^/ f- b! q) {+ _# e
- let frc = Resources.getFontRenderContext();
! ~& v! @% J1 J8 K - bounds = font.getStringBounds(str, frc);
+ O) @, b) O! t) }: U - return Math.ceil(bounds.getWidth());1 f& d/ c2 E( b( X* ~$ t
- }( C$ W9 [3 C- ^: s- b, C0 ~1 B
- ) B4 Q' t3 O5 l
- da = (g) => {//底图绘制- f5 Z3 w* N9 f Q- m' C4 l
- g.setColor(Color.BLACK);, I9 ]% O. D# y$ F
- g.fillRect(0, 0, 400, 400);
( T3 y8 O- C0 x+ _/ J1 M - }! E) B7 h( ]/ C) o% d4 m$ K. a
- - y* n8 |: V/ ]' p
- db = (g) => {//上层绘制2 z3 s. Z8 Q! V/ ~2 p+ @9 J
- g.setColor(Color.WHITE);! _' Q/ z( J- X9 k6 O
- g.fillRect(0, 0, 400, 400);
5 c/ r0 V$ p3 r- H- u/ I& d - g.setColor(Color.RED);
/ F; ?$ G, l0 w" r6 d - g.setFont(font0);0 Z+ j' q8 e3 D- H% U6 s3 G
- let str = "晴纱是男娘";
: n' t1 H, Q% P/ q! V% [( w - let ww = 400;
" [3 }2 h/ R- w - let w = getW(str, font0);9 f1 P5 e2 g# E) ~
- g.drawString(str, ww / 2 - w / 2, 200);
" E; P0 M" o' w% [! e4 Z# a - }7 i9 b# i+ J$ U, Z. J
- / w5 }. C: H/ |; |( F( j. c k9 U; e
- const mat = new Matrices();# P" v9 i8 d. r1 E y0 H; A7 ^7 {& ^
- mat.translate(0, 0.5, 0);
: G% P* A$ c/ q - 9 U2 q# C) ?/ S4 ?
- function create(ctx, state, entity) {- M m, B) m7 x4 }, _% }* R& s
- let info = {+ F; h: X& h, o4 }! H0 o: M+ \& N
- ctx: ctx,
5 o! [6 r+ U" s) v9 f - isTrain: false,; }; I* @3 ^7 j& v8 S
- matrices: [mat],
& W) @3 e! B9 R3 m2 F9 Y0 Q - texture: [400, 400],
; x. x+ Z( M, P9 `3 S6 q+ @ I" w* G - model: {0 Y; ]* \4 k+ I1 q
- renderType: "light",
! H% j& Y( m( j0 G0 A+ r6 X - size: [1, 1],
H. B# z3 b9 G! Q( a- m% X - uvSize: [1, 1]4 B6 A! `* e" Y- y& Y% h1 ?' V
- }1 G t. @2 s) p. w- s
- }, n( L4 _! }4 F; F I
- let f = new Face(info);$ v) l0 V$ S) n+ c9 ?
- state.f = f;# V" x% A3 L+ q/ R& u
- 6 Q% c9 e# a" f: w: l
- let t = f.texture;8 v$ { Z6 R% ~1 Q7 h9 s
- let g = t.graphics;3 M* s6 R$ E! E8 W( {8 K3 H8 i) u G( G
- state.running = true;
+ @: d( i, m( l* u. k r+ O' f2 b3 v - let fps = 24;7 }, O4 @% c2 V1 C. E4 S
- da(g);//绘制底图, ~( G9 a1 @: H
- t.upload();5 T4 j# x, h O. i. T& @0 Z
- let k = 0;
! q2 O% X# R0 f& y- J - let ti = Date.now();
, X9 Z8 {6 y, {. H - let rt = 0;
7 _: n/ h% ]. z( O0 ?: a - smooth = (k, v) => {// 平滑变化! k; k, s+ N8 V# U s0 e
- if (v > k) return k;$ s+ I5 t" d7 v" N' B; T
- if (k < 0) return 0;9 U2 u; @7 Q9 i% H) w1 c" x+ M
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! _( c% [* I. b' R: r1 M& g - }
6 S* @' A/ u) y% q+ V$ v2 {8 w - run = () => {// 新线程
; i6 u [0 ?; ?& b1 r7 k - let id = Thread.currentThread().getId();. y, d6 V3 r$ M/ ?- W
- print("Thread start:" + id);$ Q9 u% t* b r+ E
- while (state.running) {
2 B: B7 S9 a) v: R - try {
4 G4 P% a$ L: x; ` - k += (Date.now() - ti) / 1000 * 0.2;
+ M3 c" p5 @4 P/ e( K1 F - ti = Date.now();
$ X1 C+ n% D# p - if (k > 1.5) {8 g4 G& \2 \& h8 O" H* m
- k = 0;
4 a2 a! Q3 f/ K X1 G8 C; y - }
0 m- X7 P! B/ E" L* A& L - setComp(g, 1);- |4 l1 \2 C+ R& ?+ p0 X
- da(g);3 k0 ]+ ~2 S) z1 A a+ I
- let kk = smooth(1, k);//平滑切换透明度
) b$ e% d1 f# ]: o - setComp(g, kk);( u/ X' u/ E1 G) y7 _
- db(g);2 e( m9 S. C( P2 a! y5 s- @, j
- t.upload();3 b$ n) _* D4 |3 I
- ctx.setDebugInfo("rt" ,Date.now() - ti);
" ?: D8 n' b2 j - ctx.setDebugInfo("k", k);
. r* o( ?. p- B9 P. l8 I- K - ctx.setDebugInfo("sm", kk);
, P1 L: }1 G6 A6 i - rt = Date.now() - ti;
1 v/ g3 F5 B% l- |5 M9 N! V; f - Thread.sleep(ck(rt - 1000 / fps));8 z* V) y) v0 M8 R4 d
- ctx.setDebugInfo("error", 0)
* K. Z L2 J$ I1 U - } catch (e) {" R6 a* |0 ]- Q* i
- ctx.setDebugInfo("error", e);
7 n. ]. O% y" i: j - } ]5 p2 ~; C0 P# q
- }
8 X6 ?+ v" M. Y) i9 J - print("Thread end:" + id);
( p, g3 w+ Z1 @ R7 p/ e, _ - }; l# e% e R1 t: d
- let th = new Thread(run, "qiehuan");
5 a9 W# @& h7 c) G. E - th.start();* C) A3 K. e6 c/ {* z$ m0 z: L/ f7 M
- }
, a' f+ f3 B: t* \+ _ S
! n, l& w) E: z9 O- V5 W; f- function render(ctx, state, entity) {
( H$ |3 g. e. f: ^# h - state.f.tick();
, l5 J( I: w) N/ w: g2 { - }- V8 T% j- N8 n/ a
3 l4 P. e2 q' Y0 C; s- function dispose(ctx, state, entity) {
D. s& I' M/ D5 e7 b - print("Dispose");
3 u) C% c* F6 U2 ? - state.running = false;- l" a# L$ _) O3 @7 E& T0 `) d
- state.f.close();- k. J, I3 d4 b$ J% Q/ [
- }% f+ {8 A$ s5 V8 V: P; u, V+ ~
1 _6 F$ H5 e( }+ P+ D3 E- function setComp(g, value) {7 O$ s$ ?. ?% I! x; o
- g.setComposite(AlphaComposite.SrcOver.derive(value));
" {/ w1 n5 W+ c! B( z- Y' ? - }
复制代码
6 U# U, p0 z% r9 u" m6 n1 U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。" v% c8 ^6 V+ @0 Q. R
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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)1 [8 W/ F: ?6 c# q. `8 y, `2 F1 B
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