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/ A5 R: j& u9 j* j' B* N5 R# U- ~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。
- e" J0 V$ k7 @# N2 ]* D- importPackage (java.lang);. z6 i( }" D1 l, t0 Z- w' B: y1 j
- importPackage (java.awt); ]+ d6 U4 ]6 B e4 d7 p! p
9 W$ B8 z+ E! T% l6 y4 w I- include(Resources.id("mtrsteamloco:library/code/face.js"));* b( h% a) U3 h1 a! y
- ; o" D* Z/ [& n
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);4 f- O! e/ ?! z- m7 [
- . w# s. [ m; D/ z+ O4 r2 }
- function getW(str, font) {* u3 z2 l5 P* m8 z
- let frc = Resources.getFontRenderContext();; X2 c- ?# n4 @# c
- bounds = font.getStringBounds(str, frc);
3 ~" }5 g7 g2 g: E - return Math.ceil(bounds.getWidth());3 V& \- d$ }: |5 |
- }. W) w* R- O2 O( D3 M# ?
3 |1 Q* c- s! l; Y7 N- da = (g) => {//底图绘制4 O$ W( q3 ]" w4 j
- g.setColor(Color.BLACK);
5 S: b! U, i: P: o - g.fillRect(0, 0, 400, 400);" ^9 f! P0 _% e) {: E4 f/ a
- }
9 E. H% \* B4 Q7 X R% L
% e' X& u' F0 R! y5 Z. o- db = (g) => {//上层绘制
! S+ u7 R' E" D: j& d - g.setColor(Color.WHITE);
% ~9 C( v3 j1 `7 ^8 b - g.fillRect(0, 0, 400, 400);
( T: `* P' ~" w6 z1 F - g.setColor(Color.RED);
% t6 @$ c) A( K - g.setFont(font0);
$ X) _! G/ v( Z - let str = "晴纱是男娘";
1 X8 C- U- P9 ] - let ww = 400;) k! o0 z1 h4 Z6 P8 C f
- let w = getW(str, font0);
, p( N/ K3 y; a3 K9 I. o* V6 { - g.drawString(str, ww / 2 - w / 2, 200);
6 {: K. w2 d6 Z# G; ^' I+ E5 M - }* Z7 b9 O+ e7 j2 z3 Z
3 j3 _, _2 M& j! A/ j+ ~- I( R/ e! q- const mat = new Matrices();
0 Q: d5 ?9 t$ M4 g+ E0 X - mat.translate(0, 0.5, 0);
0 J+ ]+ l* [5 m! K9 A3 N0 k! N
3 \2 u5 d4 A0 h2 x, s" A- function create(ctx, state, entity) {
, |3 Y% {; b1 l8 J; l1 G - let info = {
4 r7 H8 |7 \3 E H( ~1 N - ctx: ctx,0 L; R& L# r" P) ?/ x
- isTrain: false,
# Y1 O0 A5 E+ _% a( D9 [ - matrices: [mat],5 y# M I( `4 t. K( q' z- u: ~( X
- texture: [400, 400],3 o# I4 W: y$ J) U3 E @+ e3 F
- model: {" X# f- X% ^+ u% g7 M( e2 P+ q
- renderType: "light",* `; n3 k- K, Z; B
- size: [1, 1]," J$ a. V7 X& D1 {7 k" z7 R! ?
- uvSize: [1, 1]- f+ X+ w! a( F5 M- P
- }' _& e# e; [7 }2 I R8 u+ y
- } B9 t$ B# V& [4 L; T
- let f = new Face(info); m4 E# m% R+ V$ W$ q
- state.f = f;- I! `4 w; {9 W b2 b. O; h- }
& O7 A F6 z: z+ z7 i- let t = f.texture;' _( @% Q; V! R) R
- let g = t.graphics;
$ l2 p3 {0 _0 T1 d4 l0 h E - state.running = true;
" J: I4 w+ F/ R1 [- U - let fps = 24;% n5 ~4 l8 S' {
- da(g);//绘制底图 P$ K6 b% w- _0 m" G( p* K+ H
- t.upload();2 x. d# i. p8 Q" q- j0 d
- let k = 0;1 ~* Y6 @, t, d& _* v% s8 t* t) ?' a
- let ti = Date.now();
# ]" i# e/ p; d4 y' O; d- c - let rt = 0;
$ }* W; f, H9 y, q - smooth = (k, v) => {// 平滑变化) Y; E4 |. Q. D# M+ N6 x
- if (v > k) return k;5 c4 q2 L$ `2 |6 }
- if (k < 0) return 0;
: Y; B4 u" w1 `* y5 |( D; X7 _8 D - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
4 S1 v- K% w: j8 G* v) } - }- I( [! K' ^2 D# @7 R& N
- run = () => {// 新线程& w, U# T1 O. I: ^$ y
- let id = Thread.currentThread().getId();/ R, l8 b; R2 s/ V, t
- print("Thread start:" + id);
4 L8 f5 f% C' Z" K3 K% l, x - while (state.running) {+ L! V& W& b; _. Q9 v' n8 G
- try {
9 S1 C$ c0 e: g4 b - k += (Date.now() - ti) / 1000 * 0.2;
/ H( M; m P1 _7 R# N- e6 M - ti = Date.now();
! \6 H2 `8 n! t. B* p2 {+ R2 P - if (k > 1.5) {/ F# E* c- ~5 v! \) X% ?+ C$ u7 I
- k = 0;0 H$ ~2 t j X7 o @( @* `5 X* [
- }
5 H/ W5 } B- Y' q7 c - setComp(g, 1);
1 P% k" @' L' ?2 ]2 \! c - da(g);9 e1 e# _ z# D/ o/ }" \
- let kk = smooth(1, k);//平滑切换透明度
2 Y2 _% W$ K8 s. p - setComp(g, kk);
/ k/ j) r" D7 C - db(g);
) I) P: a7 b [) C# [/ A - t.upload();
" L/ t/ T% m7 R1 @ q% ^ - ctx.setDebugInfo("rt" ,Date.now() - ti);
- z9 i( e* z% p/ \0 U$ o1 Q* ] - ctx.setDebugInfo("k", k);! e7 }+ o; U. u
- ctx.setDebugInfo("sm", kk);2 M% U2 A/ ^. V
- rt = Date.now() - ti;* p% D \% ?+ F+ O" O2 K; N
- Thread.sleep(ck(rt - 1000 / fps));
t6 J8 I8 N4 Y7 {7 { - ctx.setDebugInfo("error", 0)
; _" ~- b0 \8 U2 X* V - } catch (e) {
/ T" Y' x% p! l$ i- T3 a# {0 ]& \, m: S - ctx.setDebugInfo("error", e);* \- F! Y# m1 ^/ E& F4 |
- }! Q, u$ n- B+ u
- }
8 n- ]- A `3 h0 N* ~3 J% H - print("Thread end:" + id);
0 f- _7 e+ M$ A% k# @3 a - }. L( y: \" z2 d
- let th = new Thread(run, "qiehuan");: D: i* ]# a9 P1 R+ D& x7 w
- th.start();
8 a) g( h; `7 i: v% I - }3 c. ~. N, m/ L1 y( x9 \
4 v6 d$ L: T$ o% q# p& _6 L9 ~- function render(ctx, state, entity) {# C7 U" M) z$ v# f/ w N! |: L7 y0 {
- state.f.tick();: f' ~/ f( m7 q5 e
- }, k. i/ C/ v! h
- , B& w! J; E! S* S" H k- j/ J
- function dispose(ctx, state, entity) {+ b) V; Q( d0 g" t l! x! U7 ?
- print("Dispose");
$ C& x6 K- r7 |1 M7 _* u - state.running = false;3 U" m+ O# |9 [# A
- state.f.close();( u' [. g: C1 i* B' H% {
- }+ o6 A) z$ {7 ?) _& w9 E
1 p4 G1 |% v4 ^; ?( h& A- function setComp(g, value) {
# D% q. ^! g, B6 N+ { - g.setComposite(AlphaComposite.SrcOver.derive(value));
8 u2 e8 r: x+ y4 f a9 [5 A: h2 Y - }
复制代码
- h5 y8 A/ m5 N# Y2 z; k2 {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)5 e$ e# z& v+ |' B7 j; Q$ J4 Q" b! p
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