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# z/ L3 b" C. c; P$ o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。+ I, t, h, g" G5 z" @+ m
- importPackage (java.lang);
/ e8 n3 K& _2 p& K: O, P5 a - importPackage (java.awt);# I/ c. r+ B$ K9 P5 }8 @
9 y7 b0 u/ V5 m- include(Resources.id("mtrsteamloco:library/code/face.js"));
; Q# k2 _# o. Z! H4 {3 C - 4 ~- S; n6 S/ K1 {
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ l: S* ^% S5 B0 Y) L! `$ ?8 H
# T* c) @/ ]5 c- function getW(str, font) {
1 S' ^" r7 [, E8 ]$ Y1 ] - let frc = Resources.getFontRenderContext();
J9 [# E2 F( B7 p* x: J3 G - bounds = font.getStringBounds(str, frc);# K# n G# R- |8 t; W8 i% C
- return Math.ceil(bounds.getWidth());$ H5 {5 W% a# i* ?
- }
) {0 i5 f! F0 R; i2 h' A9 n1 R2 l - & ?. x8 E7 F, z/ r/ K
- da = (g) => {//底图绘制
' [1 j5 P$ v l* D8 ?) m, j. E& g - g.setColor(Color.BLACK);9 H% s- ~" I0 L6 P- U k3 T/ ^2 C2 E4 {/ ?
- g.fillRect(0, 0, 400, 400);
" Y: Q# K$ A" r# n6 X - }7 H: c" l% e3 D4 ^ e* \2 I- n2 V
- I7 G' y2 u9 x) }- p5 u o4 f0 U- db = (g) => {//上层绘制6 D: a2 r0 p- y% r
- g.setColor(Color.WHITE);
' V. S; x6 g2 M1 Z - g.fillRect(0, 0, 400, 400);
% G9 Z) P7 `3 P; P1 S! E* p$ J5 @- N - g.setColor(Color.RED);
5 w' @$ g+ p _( w - g.setFont(font0);: o/ g6 X) |6 i& M! ?
- let str = "晴纱是男娘";
2 w& M( x5 q2 J+ S - let ww = 400;0 v: r8 N9 G b9 ^6 u* A9 Y5 C( e h
- let w = getW(str, font0);
5 p+ ^- h m" ?) I9 B* q: X - g.drawString(str, ww / 2 - w / 2, 200);( U$ J9 N6 z. @/ D0 X
- }! w9 o* k* A/ K
& S# i0 V/ `6 G- k! y; d- const mat = new Matrices();
; b D4 l. _* U+ `9 R - mat.translate(0, 0.5, 0);/ A3 c* v. { O/ Z+ M+ t& ^
- T5 h0 L2 F" i) ]
- function create(ctx, state, entity) {
3 F1 ~8 K) D) ~9 X# N) v, S. b! f' } - let info = {
- S$ W% [6 h0 B$ ?9 L - ctx: ctx,
' Y, Q( G1 W; P* e+ l. z" [" g - isTrain: false,
5 C* F9 U+ ^# K5 x/ H/ k" A - matrices: [mat],' K' L5 e/ N3 J1 k
- texture: [400, 400],( a7 J D! l7 ~5 D7 [
- model: {
& P P) M2 p: Y, P4 I - renderType: "light",( B$ M$ V6 B( ]( f3 i' M) C( q
- size: [1, 1],
. E* \3 @3 H. t) u6 y: m - uvSize: [1, 1]
0 Q+ C1 Y! R' I E: _4 V - }
7 b& R! }1 [: u9 f" _6 P @7 A* q$ T - }1 |5 E" G. F+ T$ r& `1 d
- let f = new Face(info);# t# i4 Z. l0 t/ Y6 C7 ?0 I
- state.f = f;
% c+ Z/ n6 a6 T7 J8 n! x0 S2 V
7 A$ O% W& p; U$ [0 J6 z7 |3 {- let t = f.texture;
5 _0 x, E, i8 k6 l/ S' h+ w2 E2 Y - let g = t.graphics;
- E! _* [* j9 O$ R( H; s- r - state.running = true;
( T& b V2 S3 T+ A; X' L - let fps = 24;
3 Z6 h; `2 U0 ^9 N; F! B5 ` - da(g);//绘制底图
7 e) D/ K% M7 _4 E, Z0 x - t.upload();0 q' t9 O- H$ n, t3 e
- let k = 0;% T+ w- I) D) \' o. Q( \
- let ti = Date.now();4 h2 H$ m$ z7 E
- let rt = 0;% M2 h& V8 P! e3 T
- smooth = (k, v) => {// 平滑变化' {2 w ?, T, g" k! e
- if (v > k) return k;
% F! p& c! S4 `; P3 K5 z - if (k < 0) return 0;- r& O# ^3 E) c% m! I! C
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 R) r: g- C9 m5 c, c
- }, r3 s+ C8 `6 l. V. W
- run = () => {// 新线程
% P4 T9 e, s- D- O" T - let id = Thread.currentThread().getId();& X( s' f( W* s9 K( l% c
- print("Thread start:" + id);
; Z {7 u+ z: R$ h8 J. I" j, k - while (state.running) {% y, z/ ]9 V* M k& Y5 U
- try {
6 s6 E) q, c4 A! J - k += (Date.now() - ti) / 1000 * 0.2;
& o0 x( D7 I+ x8 D" w' z# [ - ti = Date.now();, A+ Y) T8 V3 @
- if (k > 1.5) {7 a7 v8 B$ S" d+ X: f8 W
- k = 0;! E* \% H! F. Q
- }
# [1 P5 ^$ T# w' ]1 X - setComp(g, 1);# c3 t/ |3 C, E- S
- da(g);
3 O. I; V5 f2 ? - let kk = smooth(1, k);//平滑切换透明度
5 f; w5 }7 u5 U5 a: b/ y8 A& Q - setComp(g, kk);
! l4 h7 y3 s# G2 u" L - db(g);
j- T: _/ P, F, U! }' e - t.upload();
% R! g X) A: T3 O - ctx.setDebugInfo("rt" ,Date.now() - ti);; J) f/ @5 P7 M2 T
- ctx.setDebugInfo("k", k);4 V' U4 L: z2 A6 ?. f6 P4 N
- ctx.setDebugInfo("sm", kk);
( c4 B" X; M" _6 C - rt = Date.now() - ti;9 b" W* p) y. H& s R" l9 _
- Thread.sleep(ck(rt - 1000 / fps));: V6 o3 a* |( B% z' R% D: v
- ctx.setDebugInfo("error", 0)
2 b+ |- _. u- v& W9 i - } catch (e) {& H0 S( B- [" J0 P! c0 Y1 Q
- ctx.setDebugInfo("error", e);% z) @7 H% w- z3 [+ d9 w3 P9 Z9 ^. ]
- }
) Q# A) i# S. \4 j - }
# \5 S6 e G% `; p/ v - print("Thread end:" + id);
) a0 m# E5 O& C/ M; ~3 x - }: C4 e d; r/ P3 `7 }
- let th = new Thread(run, "qiehuan");% g/ i4 [% a, [
- th.start();* j3 R9 U4 p0 m4 }. H5 B
- }/ H+ M N: k( D& U/ R/ u
- : ?$ D# L8 Q, @" E, T% W
- function render(ctx, state, entity) {
/ m( Z2 d- G/ v! L q( V - state.f.tick();
1 V P# e7 Z* J. _3 [ - }
- ^( o6 H0 N& t2 J
: D' j# y, x6 ?1 j' }) X; c9 S) ?- function dispose(ctx, state, entity) {- e. L8 j9 I) W- ~7 {3 x$ N: v% ?
- print("Dispose");' a' P) V# t" t# R7 O6 b
- state.running = false;& u. }! L% `' J1 B6 q* P
- state.f.close();
7 ^ o" n7 \ o - }
# }/ w; l6 R1 Z - g+ p4 @4 f z' p' J% C" K; h
- function setComp(g, value) {! u0 m. _# D% C% z6 _
- g.setComposite(AlphaComposite.SrcOver.derive(value));/ f7 s/ k2 G; d7 n8 n: z
- }
复制代码 ! j/ T5 t7 `/ y3 v* I, U* e% G# i
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。( r$ m: G! p0 q3 h( [4 V
8 A; l" j5 _- J u: \, Y5 P& Z
$ w- F$ S9 @+ g7 y V1 I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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