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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。# U4 h& _4 i: `. V4 c" _
- importPackage (java.lang);6 \+ m) t' p2 S8 M
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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# z; }7 N: x( o- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
8 W2 T/ Q" G, \, R' N# b0 G: g - let frc = Resources.getFontRenderContext();
6 @4 F% u9 Z) h* C: Z9 E }/ n - bounds = font.getStringBounds(str, frc); J7 i h3 ^! ]/ g4 V9 m: b" q
- return Math.ceil(bounds.getWidth());
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- ( L! H; d& F7 C( w8 ?0 |
- da = (g) => {//底图绘制6 Z* u) C" I* x6 l" T
- g.setColor(Color.BLACK);
$ n/ G$ L* D" I0 p9 `: k - g.fillRect(0, 0, 400, 400);
8 e" f) d5 X3 [! F* |: n F - }
4 ^ X1 \! P/ F/ V" p3 I2 a- I+ O - " K {/ R/ ~2 q& n" }9 J ]
- db = (g) => {//上层绘制
; P" U& o; m/ u o - g.setColor(Color.WHITE);0 B. X. y% w% W6 l5 @! G5 R+ \
- g.fillRect(0, 0, 400, 400);, ?' D/ Q. P3 t Z+ E# @+ c( z
- g.setColor(Color.RED);
& e8 H1 V' s$ J6 m& a C - g.setFont(font0);
/ i% m$ T7 G; R4 T, G6 I - let str = "晴纱是男娘";: b1 H" D( k) n; X+ w/ E( T1 _/ y
- let ww = 400;
$ ^) x7 V5 d. V - let w = getW(str, font0);
1 n: v/ c6 }% ]) H* b; z+ H9 W - g.drawString(str, ww / 2 - w / 2, 200);; [9 j$ x. L5 | r: [2 C* s' ]
- }4 u! Q! w; M1 {
# Q5 S6 D! ~8 Y4 E3 C' G- const mat = new Matrices();0 @4 k1 l) q/ v V; @0 e! |
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
3 x, p# u; u5 L# S6 j1 Z2 p - let info = {
9 P8 b; M+ b) @ R - ctx: ctx,* g9 ^# T4 ~, A
- isTrain: false,1 _7 s" Z3 u6 {9 L
- matrices: [mat],
( F' n+ i6 k1 E - texture: [400, 400],5 e: Z( P C" s1 ^7 a, m- _' j4 g
- model: {* |9 ^- H! e2 h
- renderType: "light",0 W9 z: w2 n* Z4 C$ P' g2 S; ^
- size: [1, 1],
8 y2 L. X4 B2 W s2 x - uvSize: [1, 1], C. r$ J8 _4 ]
- }
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- let f = new Face(info);
/ {2 R; m% C: I4 f9 t9 l - state.f = f;
/ d+ m! j2 y. I
: V+ c. z+ P' u# R" z- let t = f.texture;
. _; X E l. S& m" H9 l - let g = t.graphics;
8 b( x f4 t$ A - state.running = true;
& l% `9 M) w2 d& W% l - let fps = 24;
z- \! m0 Y j/ n - da(g);//绘制底图/ S7 | V- A# w1 e' Q* c* U
- t.upload();# I0 t* K" n* b9 N8 L5 n
- let k = 0;
5 P& d1 ?- h5 v, t9 L - let ti = Date.now();1 I- V/ p& ^0 K) A% }
- let rt = 0;+ c& Z0 k; h* w, r$ M
- smooth = (k, v) => {// 平滑变化* y1 X& v6 ?& K) X) V9 p1 v+ T
- if (v > k) return k;
! b) ?" n* T4 O7 X- _ - if (k < 0) return 0;
# k# x& c# Y5 W+ w; n, O5 T - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( K; F! b7 u; w! q% c
- }
+ z) _5 }1 e& k v0 c; t3 V$ m# c6 t - run = () => {// 新线程
, \4 l. d/ l- j2 w" W/ c* \7 N - let id = Thread.currentThread().getId();
4 L, k, _: E+ q q! H. n - print("Thread start:" + id);0 r. I2 |: k% I# A1 ?2 e
- while (state.running) {$ c! ]7 b0 p0 u. @# r. _
- try {' K( t$ K6 G5 P+ ^+ p; d0 H
- k += (Date.now() - ti) / 1000 * 0.2;
. {. {7 x7 G* o! s) A+ D' q# f$ i/ S - ti = Date.now();% E* ]: o' k$ }% n+ s0 N2 ~: x+ U: L
- if (k > 1.5) {9 Q) j5 J$ W0 L) a% v! a. o, {
- k = 0;8 f% @. I$ B# @- z9 h
- }
+ }/ L; U+ s4 M3 d8 i% Z - setComp(g, 1);
6 v) k' z. w0 E, Y/ q2 _ - da(g);( m9 \6 N% t2 K
- let kk = smooth(1, k);//平滑切换透明度
2 Y2 C! f5 ^- {& D - setComp(g, kk);5 w0 @2 d+ \/ o* q9 O
- db(g);
1 j+ _( ]# ^, ?- w5 ~% {. _5 u: U - t.upload();% x. y! T/ J( w3 u
- ctx.setDebugInfo("rt" ,Date.now() - ti); ~$ h2 I$ p! X- Q7 a9 A
- ctx.setDebugInfo("k", k); H9 i2 [& ^5 K* n
- ctx.setDebugInfo("sm", kk);
. O) k# G7 W; O, d# p' k - rt = Date.now() - ti;
0 t) q" n, h, J; F/ l' o - Thread.sleep(ck(rt - 1000 / fps));
% l: W* y: w* u" d9 v - ctx.setDebugInfo("error", 0)- J9 ~: O+ S2 C! p- N6 t$ |. `
- } catch (e) {
+ h7 {, ]: ?0 G; E: m9 A. o% A4 U - ctx.setDebugInfo("error", e);+ I& B! d, F! V; g7 s# x) n
- }( i0 R$ e4 y" D! y: I' `' {, @: @
- }
# \) b' j. \) ?( ~ - print("Thread end:" + id);6 `# C- m! v; F
- }( R- P/ g! w! S
- let th = new Thread(run, "qiehuan");4 ~4 N* p- O3 d: S H8 u0 R& o; Q
- th.start();
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- $ }- o0 H# i% z" D- H8 [# f. e
- function render(ctx, state, entity) {
4 T! j1 s% e+ q; X - state.f.tick();4 D# M# O9 }2 S7 t, E' H
- }
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" x1 A$ @* K( D: m. L4 a- function dispose(ctx, state, entity) {
: }: T5 a1 B" Z9 ]) p - print("Dispose");
& |, v. m+ W$ s7 P - state.running = false;8 y% p+ D' A. H) D% q3 u
- state.f.close(); r1 W# |: x4 C+ ^
- }
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3 S+ _' j9 N3 |2 i; i3 Z" F- function setComp(g, value) { R6 [! E; o9 m" \
- g.setComposite(AlphaComposite.SrcOver.derive(value));5 J" _: c( u! S1 T+ L
- }
复制代码
5 @* `0 d, r# q; R a( {) h& e# j) o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。
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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)7 C! V: O. m! J/ F2 N# T
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