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+ F Z/ B3 |8 W. T' ]! l. 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。* B8 O9 Q- D5 f) E3 w6 ?( x3 Q0 l
- importPackage (java.lang);( b3 _. A2 f' B3 M. z
- importPackage (java.awt);
# _% t4 i$ r0 l1 I7 e1 H
/ ^6 w) ?" z* Z8 v- include(Resources.id("mtrsteamloco:library/code/face.js"));0 p) N* z9 o$ {7 D- ]; v
, n1 e' b- }7 U; M* L5 Z$ v/ D- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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1 [* X4 Z2 M6 Z0 e4 `- function getW(str, font) {
& |$ u9 _$ l- q4 q - let frc = Resources.getFontRenderContext();/ }1 @8 L; ~: V: u) i7 ]
- bounds = font.getStringBounds(str, frc);' n I: s, X; k+ u
- return Math.ceil(bounds.getWidth());0 `) ?' v, @0 L r( C
- }
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. @- \. Z% C3 Q; ]; o+ @1 V) v6 Z- da = (g) => {//底图绘制. J; [7 y+ q- p) _
- g.setColor(Color.BLACK);# x! ^7 u1 W6 k
- g.fillRect(0, 0, 400, 400);
. Y5 M; w( x! B+ { A - }
& g- y, ~. z t - 3 e2 [3 C% C/ G5 u9 M! g9 |! t& V- T
- db = (g) => {//上层绘制
$ a) A, H0 z C: L! T; @ - g.setColor(Color.WHITE);
! P9 E+ D+ Q4 w) X( P7 s0 z! a - g.fillRect(0, 0, 400, 400);+ b/ t; h& ], }
- g.setColor(Color.RED);
! P! l( m, }: X2 @3 X - g.setFont(font0);+ N, D& }" j. B: d$ u' }( |! K9 R! v
- let str = "晴纱是男娘";
- H9 i; Q0 G# H* ` - let ww = 400;6 ]7 f, X) @/ o# O/ a6 `
- let w = getW(str, font0);
5 x1 b; Q; s- s9 b6 I - g.drawString(str, ww / 2 - w / 2, 200);/ c( i9 d/ Q/ u( {/ n
- }
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- const mat = new Matrices();' {4 i; J6 ]- G( M, u* ]9 v9 T
- mat.translate(0, 0.5, 0);1 a8 _2 Q4 K% O9 @
- ) F3 M; }% U! }1 V( B$ w
- function create(ctx, state, entity) {
6 A3 e! k3 |3 |, Q+ p( `/ s - let info = {# t& ~/ u- g& [% e* |+ ^% Y
- ctx: ctx,
. ]; [, A8 o( x$ H' {3 @4 ~; f - isTrain: false,9 D0 R% e4 y# | h* l
- matrices: [mat],% [. ^4 y; ^8 l7 _7 L
- texture: [400, 400],. [6 O$ V6 b. s! l9 d6 C
- model: {
6 n; ]" V7 ?& q2 Y+ B) J/ u - renderType: "light",
" H% I* I- H/ D+ |. ?8 R% n - size: [1, 1],4 @9 X L/ ?5 e* X
- uvSize: [1, 1]5 o2 q+ r7 ^, m
- }
. i9 F% `- m2 u* T - }
; c' f$ T, l! h$ A, k - let f = new Face(info);* L) Y! B9 t1 S5 E7 [1 N" T$ Q
- state.f = f;1 J H: r- m) x6 H/ x6 D3 a
6 c" q7 T. f, F3 \3 U/ W6 a- let t = f.texture;3 V9 D2 L1 a$ t1 c; x; G; v2 \0 @
- let g = t.graphics;
2 P9 j; \7 `. c# P3 R! m# Z4 q, G" } - state.running = true;
1 E0 {- J4 S0 x& z9 X - let fps = 24;% r) v$ C' {. Q
- da(g);//绘制底图
8 n6 ~, L: Y3 F9 ` - t.upload();8 C8 \& ]) j1 Y2 q9 y: _
- let k = 0;
+ f8 K5 @& }, n - let ti = Date.now();# e& b- j, `# e) s) E$ [! ^: t; f6 [
- let rt = 0;
|1 R/ @* O/ ?; p8 `, `/ l - smooth = (k, v) => {// 平滑变化
8 J6 ~0 w! t4 s4 i* W' z- V4 w+ K - if (v > k) return k;: v+ f0 o9 g& w, k2 R
- if (k < 0) return 0;' t% v, q% B6 {5 W
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
6 y8 l, h! `+ W& X - }* j o; \" ? I3 h; N
- run = () => {// 新线程3 g& {9 ]% }7 X2 Q- E
- let id = Thread.currentThread().getId();
% k9 S d: O, h) b8 Z( u) R - print("Thread start:" + id);6 ^. |6 ~( d8 i4 N. e; [' X4 M
- while (state.running) {
" [3 r: F. F0 |4 E* R - try {
: Z* q4 B' F! {0 o - k += (Date.now() - ti) / 1000 * 0.2;' [7 n0 j* X5 u1 w) w
- ti = Date.now();
7 X3 U) M6 `$ a - if (k > 1.5) {
2 w+ @" I2 O. M( {7 d5 ? - k = 0;
& f0 s6 r* }( N( r5 F: m* \' ^ - }
0 w6 Q% t+ J, Z9 Y - setComp(g, 1);5 K% L- |) |( @1 x, k3 L }
- da(g);; { E; N8 X7 Y* y
- let kk = smooth(1, k);//平滑切换透明度 d7 M0 D6 V5 Q; I$ w5 F/ I* F# C
- setComp(g, kk);" W% m0 R/ x8 c( _, w# N- D
- db(g);( r; b6 c, }5 ?$ U
- t.upload();8 S3 b/ S4 W$ o4 C& M5 X) R- h
- ctx.setDebugInfo("rt" ,Date.now() - ti);9 g& A2 \4 N [( Y; J3 U- l: \
- ctx.setDebugInfo("k", k);( e" B" p1 a3 G+ D
- ctx.setDebugInfo("sm", kk);7 p [% c- Z7 v z* p
- rt = Date.now() - ti;
/ B- K6 c- v. Q# L8 d - Thread.sleep(ck(rt - 1000 / fps));
A6 r' ` Y' h: v* T - ctx.setDebugInfo("error", 0). ]+ R8 V9 _) e4 p# m0 {
- } catch (e) {9 [8 D6 b3 F o! I+ B
- ctx.setDebugInfo("error", e);8 L0 M, u! p" ^' e3 y+ i7 \
- }
. a* Z9 V- L4 S8 l2 e - }, P, O u! r2 }: V$ A7 p
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");& o, Q* a E% `
- th.start();* f, C! A2 y( T, \. \
- }& o! `: Y4 P R2 G
# q* Z: w; n# k( b1 |- function render(ctx, state, entity) {+ R+ E% m; a; f/ x4 p6 i
- state.f.tick();5 d7 G$ @ j* d( _% {- @
- }
8 b# x& K* o4 m4 D7 F
6 Q2 M" h$ c* C3 \- function dispose(ctx, state, entity) {
& l0 G6 ~$ L# b, t [% B* s$ r - print("Dispose");4 O% W" z4 G4 q$ Z' s
- state.running = false;
) r7 ^* \6 r7 | g S# d6 ]# v - state.f.close();' ?/ J/ X4 t H9 D. s
- }: [+ h2 {1 [1 g7 a$ X
7 W5 h# o6 ~ K: [7 s( d- function setComp(g, value) {0 W% H" X) W6 D
- g.setComposite(AlphaComposite.SrcOver.derive(value));; Y9 x1 O' a9 ?* M+ O
- }
复制代码 , \) ?4 j! O0 c# Z( O, |" p* x
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。9 Z3 s7 h2 {0 Z& e; @
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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 k6 e2 }: w+ P) D% ^% B
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