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% R* K! Q! L$ d( 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。, z- W& [6 m& H6 W) }1 _3 @# `% q- y
- importPackage (java.lang);- _% a6 q9 ^% Z3 p! d6 x) @/ [/ |
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
; D ~* O& o2 \ - / `. e! R! k x) S3 y- Y
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
" R8 ]8 J+ j8 t3 S' p+ Q/ a
: z8 M/ D* U' Z; F$ |& E- function getW(str, font) {
$ {, ^- Y. {# k7 C1 j - let frc = Resources.getFontRenderContext();7 ]2 U E5 {: R3 C p: w! Q2 }
- bounds = font.getStringBounds(str, frc);# K( s1 Z9 m8 f* s
- return Math.ceil(bounds.getWidth());+ c/ t1 K- c, z, N
- }7 R/ K, v b$ M0 V* n, b
- * _; f; t Z4 y1 U7 Q3 b9 {5 ^0 s
- da = (g) => {//底图绘制
1 V) x$ o( ~ i6 m" m( i - g.setColor(Color.BLACK);+ {. `. z/ p2 B* k9 f: ~7 V
- g.fillRect(0, 0, 400, 400);
. a4 L- E) d( k - }
. p. _. q& e. U9 [9 `9 M, F% |
) i# f3 G- G, i- db = (g) => {//上层绘制
5 a% [, P/ y- R - g.setColor(Color.WHITE);1 j0 J( P5 q6 E$ U- H
- g.fillRect(0, 0, 400, 400);* U- P2 }6 ]) Z8 W( r, d( P
- g.setColor(Color.RED);) ~) S4 ~% q% T. D5 U
- g.setFont(font0);
- a3 Q# Z. a7 a. _! x/ B) @% s - let str = "晴纱是男娘";4 @" u* G( w7 L& w; d; n. B3 Q
- let ww = 400;
7 Z; y- B! @, y p, S1 e2 S8 N - let w = getW(str, font0);
# D. i8 O$ d4 A% C2 _" Z! g1 w: |3 Q/ Q - g.drawString(str, ww / 2 - w / 2, 200);2 F; B6 Y) _$ z# C" g6 {0 `
- }: L+ G: L& j N* y/ n
- $ x0 O0 @0 y; B9 U2 @: L% @2 _
- const mat = new Matrices();
4 \ E7 b8 f9 K/ E7 i; E2 o - mat.translate(0, 0.5, 0);* Z+ ]) b3 a; E8 \4 W
- ' k+ M8 b) {+ c8 i2 V+ `' H2 O. X
- function create(ctx, state, entity) {5 q, v/ e6 Z* B6 X# r& w0 o m. i
- let info = {9 h5 s2 q+ X, z, k/ @ v+ f$ c/ S
- ctx: ctx,
R# T" w3 S6 V1 [ o* x - isTrain: false,
8 d; E$ T: } c6 t8 @7 ] - matrices: [mat],
) Q2 w- ~) g# _0 N! W6 J4 M# B q - texture: [400, 400],7 f! Z9 @& l) I$ N9 u% f3 o/ L6 E
- model: {
7 z: H, S& F6 Q4 @% L5 r) p1 v - renderType: "light",
" B, \2 i, J6 m9 I' w' @ - size: [1, 1],
& h v6 K0 {/ T y5 d" E - uvSize: [1, 1]. y3 e. p; u. A( _0 Y2 z/ \
- }
9 m2 u- ]: V( Z2 a - }2 C1 d. P; t# {; L0 f" d' b
- let f = new Face(info);
: Y) ?* k) d, ?- Y - state.f = f;2 E3 p+ }. e+ H9 ]0 ]2 w
. n4 ~# g% _" L, k# F0 ]4 f- let t = f.texture;
; d' @$ @5 L: Y: U& c! L% n( I - let g = t.graphics;4 v, k( |! Y2 P! _
- state.running = true;
& u5 x9 ?6 a) `, N - let fps = 24;
+ n: |- T$ V8 T- h7 Y - da(g);//绘制底图- d0 W* F8 D+ S% W/ d6 W. D( d4 P$ d
- t.upload();/ Y9 P8 A& P9 L1 e9 d2 G
- let k = 0;
; o4 _! E. g7 |$ p# M) o - let ti = Date.now();" |5 F" Y& b7 \- N7 w9 |! R* J
- let rt = 0;: t( C8 | K M* p4 o! O
- smooth = (k, v) => {// 平滑变化; f8 g% b$ b7 `) H
- if (v > k) return k;
1 L G6 t8 k# {; r" j+ F - if (k < 0) return 0;; H% j# q6 P9 [# I+ w+ \
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
, M7 L: m8 E* _+ Z- a% U - }
1 _: w7 U" y5 h( T" u1 Y& P8 U - run = () => {// 新线程/ m4 o& i6 \( ^6 \" S. M
- let id = Thread.currentThread().getId();
2 q P2 N& ?' t2 q( u - print("Thread start:" + id);1 Y/ }4 S* P: l( L
- while (state.running) {
$ P* \4 G1 ?) @6 `, T( W - try {9 W) o" a* H3 M) h1 g% |6 M( x! A
- k += (Date.now() - ti) / 1000 * 0.2;
8 l* ?0 P. {9 @8 I# b. \ - ti = Date.now();
9 w9 n: c* e. T" `: M3 O - if (k > 1.5) {' l- }' U3 q; c$ ~
- k = 0;0 k# {/ D/ f0 ^/ L4 Q: ^0 J
- }
. i0 U& `3 X, s0 [1 W$ J3 }! C z- m - setComp(g, 1);3 f# o" K( H& L; o( c( R- {
- da(g);
+ P$ R6 A% }. c* X( }8 j3 Y! B4 h9 C - let kk = smooth(1, k);//平滑切换透明度+ w8 E9 h& t1 u! P( F8 M
- setComp(g, kk);# {! _: ^) u" R. x+ q
- db(g);$ l; {& d" \8 `3 Z6 O; @
- t.upload();8 Q1 I! j* l# c1 p* _* \ o+ \
- ctx.setDebugInfo("rt" ,Date.now() - ti);) e& f. A, X/ K L/ p8 d8 t/ `
- ctx.setDebugInfo("k", k);
4 \) u/ u/ {5 T5 g - ctx.setDebugInfo("sm", kk);
8 ~5 O$ Y/ `- T w0 Y6 t, m3 K E! t* J - rt = Date.now() - ti;
9 V- m) A% i( T+ s) X4 }* j, G$ ^ - Thread.sleep(ck(rt - 1000 / fps));& A; h8 @' U* x9 C* b$ k: L
- ctx.setDebugInfo("error", 0)$ y& r8 ^( s4 n% u( U# X6 \
- } catch (e) {
% J/ b' N* }2 h0 |$ o3 u% Y - ctx.setDebugInfo("error", e);8 u* q. g" ^: R- P" s2 o; n
- }
% u6 K* a* V# d- ^4 ?& Y6 U - }
* m, Q; v0 W2 `& G# c - print("Thread end:" + id);/ D' ~8 S; J8 N$ w) D O/ b# p% x
- }( O4 }9 F* E' \* I) q
- let th = new Thread(run, "qiehuan");" o( ?5 Q$ z# ?& H3 u6 s' G
- th.start();
$ F3 R* f' _, g, c9 J: V - }; U* p8 d% h3 n9 @( }
- + B d3 Y" z* l2 V' v
- function render(ctx, state, entity) {0 C- v6 f- F. [6 Q/ [! O, R
- state.f.tick();
5 g. _. M- r# Y7 ~+ l - }
; s5 x2 D6 j( X0 n* {
- [2 N8 `* U# [1 E* }4 r- function dispose(ctx, state, entity) {
0 Y' Q( e. Z- L% Z( r& P - print("Dispose");
l& Q2 D4 v9 {' J - state.running = false;
c8 d9 H4 }0 M# V - state.f.close();) c( Z. G' h4 R& S# G
- }
- C/ h7 g3 b* D( o8 ?& M- v* l - . p$ _2 N V: o
- function setComp(g, value) {" I' k! V9 R. a' L- L& y: M# |
- g.setComposite(AlphaComposite.SrcOver.derive(value));" q' ~2 P) A# _ c Z7 A
- }
复制代码
3 b& W7 N+ N# l1 ^" w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。0 \ f$ k4 f2 V' _- b% f* n7 k
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2 d" w5 C4 |6 h1 T ~# g顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)# Q4 W, U) A9 J" O
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