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, O! l. a! y! \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。
X+ X0 o8 }0 i4 R+ P( j- importPackage (java.lang);
! @2 [9 R B& `! |# E3 C - importPackage (java.awt);
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# u( g/ P5 N# p& N6 c- include(Resources.id("mtrsteamloco:library/code/face.js"));( Q" _+ U( `8 H6 N. E! q
9 a* t7 Q: ^8 O5 x w" M( A, T A- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
+ T7 O% e! Y, w; W, N
: l& |, J7 K D6 q4 @- function getW(str, font) {
: `; _$ K! }+ q/ A4 b - let frc = Resources.getFontRenderContext();$ L. H w4 i# A8 o0 O
- bounds = font.getStringBounds(str, frc);. ]4 p* x) U5 \+ N! r3 f7 ~$ J
- return Math.ceil(bounds.getWidth());
8 c; L2 B7 h% O$ g6 U( c$ A3 | - }& I3 h# `) l* F' t o
- ; Q0 p3 k, U) p, j: w
- da = (g) => {//底图绘制0 g7 l# s0 b2 c" N
- g.setColor(Color.BLACK);' X/ {/ K* N$ u2 W( a. @2 ?
- g.fillRect(0, 0, 400, 400);
; A5 n# ~# F6 d9 P- ]( l - }4 W" h, S- F$ J5 Q3 g
4 u: C% J- h. V2 g8 ^! R0 Q+ K! V+ Y- db = (g) => {//上层绘制8 E) f: c: m( z1 T# d7 z; D
- g.setColor(Color.WHITE);& X# b4 c! N! |3 p& W4 V
- g.fillRect(0, 0, 400, 400);
+ ^, n/ t* G- U: q4 | - g.setColor(Color.RED);
7 R) Q* {* j; J% ~8 t3 L' H - g.setFont(font0);
/ g- {! N' |% [+ K4 t6 ` - let str = "晴纱是男娘";
0 b/ }* c$ _' d6 e6 U - let ww = 400;/ }' |% ?' Z7 x
- let w = getW(str, font0);4 f( p! W9 }$ z* J
- g.drawString(str, ww / 2 - w / 2, 200);% A% K& J0 `% N; ^) r! m) Q
- }; n( F" Q$ R' D e$ N# @& E0 P
- # f, Q+ d, D1 m' x) C& ?0 I
- const mat = new Matrices();+ y6 ]: @, A; `6 V% s& }
- mat.translate(0, 0.5, 0);
, t( t3 Q3 ]* l1 J: {( Z6 P
# }# ~* s5 h/ c6 y' X" y$ O R9 Q- function create(ctx, state, entity) {
# k$ L5 I1 n& e/ } - let info = {# W( g* G+ w7 t2 ~- ^4 U( r
- ctx: ctx,
5 S& U& y; W! r- j5 ~) |6 f4 c0 l$ x - isTrain: false,: \3 V9 Q, A+ g( i0 `0 F7 g
- matrices: [mat],
" B/ W& h" i, T - texture: [400, 400],$ F9 D8 A/ r* _3 P9 q% d
- model: {
" n$ B* X. [, ?: g/ B6 p# x - renderType: "light",: w: |5 `$ o( C# C$ Q' r/ M+ H
- size: [1, 1],6 q: w8 O- e, [ e) i
- uvSize: [1, 1]0 c/ R/ z }, d: `3 B! d
- }6 b. T1 Q& _% b3 V8 v1 A
- }
) }5 V, F5 Y' J+ i' r; T; d - let f = new Face(info);. K5 F L6 X0 \
- state.f = f;
& t1 `9 s/ ~5 R3 ]' j) L
0 b9 ]8 p9 S# N- G) G- let t = f.texture;
. _* p/ I1 c0 d& M6 D; X5 S - let g = t.graphics;6 l$ S+ g( r+ n( g( `2 h- ?% f
- state.running = true;
9 \1 _: X( ]3 q1 f3 ]1 R9 ^ - let fps = 24;
: i7 ^( \# q5 g# K) b3 M2 Q M - da(g);//绘制底图
1 F/ j% K4 b# t) k% E% z* }& h! [ - t.upload();& N& O2 |0 e+ _& |) l" m6 Y4 v
- let k = 0;
; x" I# X9 u$ @" k7 w. w, i - let ti = Date.now();
) w3 K P8 S1 `5 f; H O5 u' Y - let rt = 0;
2 e6 [+ Y( B" K" v - smooth = (k, v) => {// 平滑变化4 W, ^. Q( u d( q% o
- if (v > k) return k;# M$ f- b% R+ W7 I$ I) P+ k* ~5 M
- if (k < 0) return 0;
8 w- V% j# L: L$ k- x: D - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
; C' s1 w* h7 S/ r6 a" F4 M - }
/ P! C0 ^- @9 A6 k8 z, F0 u - run = () => {// 新线程
6 l L7 q# n, d8 v - let id = Thread.currentThread().getId();2 L. D4 h" _& U# r; Y
- print("Thread start:" + id);# v: B: X( e9 r$ k
- while (state.running) {
% V* R$ U1 u" v$ T - try {$ G" N" A# @& A7 Z& y
- k += (Date.now() - ti) / 1000 * 0.2;
# G% O; {* m& n! G) M- ` - ti = Date.now();' }* L# a* k6 [8 J
- if (k > 1.5) {
9 m) K- M# T1 C. R - k = 0;3 ^3 i. N, t% [
- }
8 ]& i- y0 w. A0 H& `6 F% l - setComp(g, 1);
/ D2 q/ t# K0 @& Q - da(g);
% q: f7 I& Q' d1 d' B - let kk = smooth(1, k);//平滑切换透明度- \/ D7 Y: k- t3 q( H
- setComp(g, kk);
; H- o) _" L( w5 B - db(g);
; e+ o. [9 M" ? - t.upload();
; E% z/ v$ X+ B0 a T4 B P - ctx.setDebugInfo("rt" ,Date.now() - ti);7 x8 D6 k+ |. f1 K# k) O* w
- ctx.setDebugInfo("k", k);, _* A: {2 z* u9 G& V
- ctx.setDebugInfo("sm", kk);
8 y) d6 r& s/ }9 r3 ~ - rt = Date.now() - ti;0 k& @4 h% \4 g1 D
- Thread.sleep(ck(rt - 1000 / fps));
# Y6 O" `6 s) q, n - ctx.setDebugInfo("error", 0)
% c+ D7 J$ f% s3 }; V$ {: ^. m - } catch (e) {2 Y P0 ]" Y$ s0 e5 |3 s2 ^7 }0 M+ L
- ctx.setDebugInfo("error", e);7 r, h2 A4 J/ T' I& f4 H7 U
- }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");% C& {7 f$ b' O# S9 t
- th.start();, Z4 V9 R9 `5 a; `
- }# X! H, V& E' Z' U; b( q4 k
- / A2 E( F x# d+ J. F* X2 J& f W
- function render(ctx, state, entity) {
5 I1 v- N3 T) ]5 l u X9 k$ F9 n - state.f.tick();
! _( {2 b; H% Z b+ t) D" H - }3 C+ J; G1 G% e2 `4 T
- Q& e% S: X4 w; q
- function dispose(ctx, state, entity) {' ^* L4 E: d) B2 ~4 {+ j
- print("Dispose");
; v+ W! F9 F7 \* c: E; o - state.running = false;
3 O) |- e# c; z& ? - state.f.close();
c. z. m+ b9 ], I2 P; s7 Y - }
$ q. d6 Z5 g9 h4 U3 S1 f - * B4 p( h! s* }$ ~9 a) D; w3 `
- function setComp(g, value) {3 b9 I, u" [% m( O- Z% u) g
- g.setComposite(AlphaComposite.SrcOver.derive(value));
0 S" E& d" _- [ d; {( J% j& [ - }
复制代码 # u, w' a5 {' C
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。7 t' o: O# i3 O; o, P9 x
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' ~; ^& O, h2 r8 s' ~* N3 c; X顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)0 H% `$ M5 H9 L/ J& o
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