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% x, n/ k8 h& q" T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。
; G5 L& o: I# _1 E, @# Z8 W; l- importPackage (java.lang);
( k }; l5 X' ^4 m - importPackage (java.awt);
7 P$ i0 @* k+ _7 |# \
1 j$ Y0 O4 n* {. P- v/ x$ ~) u- include(Resources.id("mtrsteamloco:library/code/face.js"));- C3 Q& i- W( Z# U+ F1 c
4 V* H) C9 W6 L `/ D- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
3 S. |2 v% N, m) P - ; L/ f- O& I1 q9 e& E. Y0 ^
- function getW(str, font) {4 E: t- Z0 Q1 k2 s8 e( D
- let frc = Resources.getFontRenderContext();/ k/ J7 Z! a& b+ v% @9 v! z8 ]
- bounds = font.getStringBounds(str, frc);, R* i7 U0 [2 D6 H# Z5 f
- return Math.ceil(bounds.getWidth());$ w, C5 z, Q0 i; f4 m
- }
/ F$ o+ W( U9 W3 u+ S - 7 y) V; g! D1 D2 Y! d- K! x2 o! K
- da = (g) => {//底图绘制; `1 ~: E. @8 Q- Q* g# J
- g.setColor(Color.BLACK);
- v/ ?# x0 l8 m) p+ T; E - g.fillRect(0, 0, 400, 400);* K" G3 V7 i& V! y9 f
- }) G1 [0 V9 y2 p( |
- $ _0 w+ V: ?- U8 W! r
- db = (g) => {//上层绘制) ]7 J' G0 H2 J# Q- j1 u! W
- g.setColor(Color.WHITE);
: y- @5 `. q1 P" y+ W& j - g.fillRect(0, 0, 400, 400);! v# i( h' f5 |
- g.setColor(Color.RED);
t1 @( `/ j4 q+ w8 n, K - g.setFont(font0);4 |* F1 X8 V9 e4 ~
- let str = "晴纱是男娘";1 s' f- Q3 q( I
- let ww = 400;/ g, H" F! @2 H5 h( t$ c
- let w = getW(str, font0);
0 s0 y i( x- F& p' F9 L2 j - g.drawString(str, ww / 2 - w / 2, 200);9 e( S1 ~; p& O. F4 @% X, X
- }2 u+ \) f, Z* c, e3 Q
# g! B+ x2 i: c" t4 `- const mat = new Matrices();' D, }% a: S# d) F
- mat.translate(0, 0.5, 0);
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/ t- b" a- k8 Q+ c4 w- l0 y2 s- function create(ctx, state, entity) {: ]' _- I/ }, @: T! h/ R* [8 a
- let info = {
' t. j+ W2 {1 t3 S& [; { - ctx: ctx,( ~2 g9 l5 ^4 D) {+ \
- isTrain: false,
/ `6 g o, q1 k) `1 a2 L( p$ N - matrices: [mat],& L( N% {8 p* D, ^
- texture: [400, 400],
6 g' P5 c ^% j. | b' E5 }0 a - model: {
+ u! e. w$ {" U/ [2 R4 h; V - renderType: "light",
" w5 H$ m n/ V+ X- r - size: [1, 1],
0 I- Z9 s. c2 r2 u3 l) [! w s: G) V - uvSize: [1, 1]
5 @5 @/ o2 g. ^9 v+ K% E! Z - }/ ^* w* E( [' [3 |5 [/ f2 x
- }
( p) P/ E/ B2 \& {' l* a - let f = new Face(info);9 q4 J3 G1 f7 Q7 @$ K
- state.f = f;2 D: k8 C# H5 f# m# w) \
- 7 i5 I5 m8 _1 q3 X5 ?% F) U
- let t = f.texture;
: y9 `; |' L+ z8 M$ \: l; h. \ - let g = t.graphics;
" k! q4 o3 M. z - state.running = true;9 I2 I3 e5 `; [* n/ X
- let fps = 24;
) I! A3 K3 e2 l0 ` ]0 G - da(g);//绘制底图
. d$ h/ j/ t" j3 o/ F; D9 a; E, m - t.upload();, e! I8 `+ Q0 R) o
- let k = 0;
9 j* n) D3 p7 n6 a! ?# F( v* W - let ti = Date.now();9 [. {/ ]1 h* e( V% c! m5 x
- let rt = 0; [, W/ u) v' c
- smooth = (k, v) => {// 平滑变化% u7 j9 d* P& ~ B8 m
- if (v > k) return k;2 R1 G4 h" V2 V; @7 o
- if (k < 0) return 0;4 K _, B4 N; D3 B2 u
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;5 \& S" J( T. k& W
- }
- c7 O! y8 o5 ]/ M2 E - run = () => {// 新线程+ [; h/ E4 G1 [; R, f) |- X3 D4 u
- let id = Thread.currentThread().getId();% {# K6 P7 m" N% x8 I8 V5 Z
- print("Thread start:" + id);
9 Q6 y% ^0 K: p: n& W& }( O1 x5 Y - while (state.running) {
2 o9 a; \2 Y2 X, Y( k- r1 f( d - try {) L$ |, w! @4 m# s5 q
- k += (Date.now() - ti) / 1000 * 0.2;
( g' T% s: l4 C; Q2 Q - ti = Date.now();
: F% P& z; T. G1 n2 _! ] - if (k > 1.5) {7 ~( b, p2 J8 ?1 N% Y* d2 Y
- k = 0;
& g1 D. i1 T" R v - }
; Y! l8 p" V# e, q9 }) X& a - setComp(g, 1);5 L, Z' L+ T! S" {3 I( T
- da(g); C! A0 x& Y# e& K
- let kk = smooth(1, k);//平滑切换透明度6 W. f8 h! p7 r
- setComp(g, kk);
! J! E& y/ u, D% O7 e4 Z( V& b1 l - db(g);1 J6 e% Z( T _( Z7 D" G1 H+ d
- t.upload();% y* a/ ]3 ]8 W1 p/ i
- ctx.setDebugInfo("rt" ,Date.now() - ti);
8 a4 ^- Z# _( \; X c+ S4 e5 I - ctx.setDebugInfo("k", k);
1 P& L9 F2 R3 E& y2 [$ O3 | - ctx.setDebugInfo("sm", kk);
, W# l; H7 T& Y& Z1 X - rt = Date.now() - ti;
0 R+ d$ l/ ~3 H! k - Thread.sleep(ck(rt - 1000 / fps));- r; s! [. W4 G- u f v
- ctx.setDebugInfo("error", 0)2 F: Q- c2 a! @1 Y% v6 ]! y2 k
- } catch (e) {5 a% G$ U& ^. T; g& u0 _5 g
- ctx.setDebugInfo("error", e);; M( D! g6 G: A6 e+ m5 K
- }& ^/ w: |0 a& H% S# ~2 s
- } }9 y" U3 b/ _" i5 b- C
- print("Thread end:" + id);
' T6 _9 y) }$ S) E# E$ d8 K9 ~ - }
- z' d1 m5 G# O! G% u5 g1 ~& x c - let th = new Thread(run, "qiehuan");
, g8 d# v% k* k# | - th.start();; p+ }; j6 P4 t. k/ P3 a# u5 J
- }. P# j# v4 x& f7 y
! J" ^0 o/ _, i$ m5 n2 U0 R( |- function render(ctx, state, entity) {0 ]+ F+ c% }" B6 K
- state.f.tick();
1 p+ Z+ V0 ^; b; C7 a: @ y/ F - }6 z' A3 U6 {2 C
- ) Z4 p2 f; y2 ~7 x
- function dispose(ctx, state, entity) {1 X- h: D0 W' e3 d; |
- print("Dispose");; s! W4 W9 L F3 ]+ Y* Q6 d" g
- state.running = false;1 w" b N% n' [1 M- {1 E
- state.f.close();
9 R6 F2 v. D4 O0 k% n1 @6 Y - }5 r/ G5 d% B; V9 H- W T3 K! \( N# J
# G8 A7 O T# w9 |3 x- function setComp(g, value) {
+ A+ L! f/ W( w2 T - g.setComposite(AlphaComposite.SrcOver.derive(value));% ~8 n- L% I' M( R$ e; b* r
- }
复制代码
* l1 a- h( C/ g$ e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。, j/ ~& u9 F3 Q ^# g( V
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. E2 m- X3 l% a# m顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)/ ~, c+ k0 a f9 j. v9 j1 j
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