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+ l; R# y" \$ |3 h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。4 Q! C, g7 u) {9 R! F" K0 o
- importPackage (java.lang);) h. a8 a z( C) f! d) z
- importPackage (java.awt);( d5 T2 i0 [; y5 o% K( }
- " ]" r2 Z" z7 ?. t/ r: G
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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0 s s; b" {% l) T& u- function getW(str, font) {8 g5 N& e3 o6 T) a1 l9 J2 k, ~/ ]
- let frc = Resources.getFontRenderContext();
8 e1 _: n; G4 x. Z - bounds = font.getStringBounds(str, frc);- t. f4 a( V7 l+ a
- return Math.ceil(bounds.getWidth());' D E9 r$ O# z+ n( s) {
- }7 p) w1 m5 v, X! ?! l( a4 U
- 3 K6 _# u' Q8 F
- da = (g) => {//底图绘制! E3 g% {+ v3 G) N' [2 o- |
- g.setColor(Color.BLACK);2 s, i9 b2 v6 c( M
- g.fillRect(0, 0, 400, 400);
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- . H$ t0 G2 h. }9 E! p9 J) p, }/ j! V& m
- db = (g) => {//上层绘制
- D( O+ P% V. L0 H8 J* g { - g.setColor(Color.WHITE);2 {" D) ]* m* e5 a4 D
- g.fillRect(0, 0, 400, 400);
% h! _8 r V4 q) Z! ]: c8 t - g.setColor(Color.RED);
! e3 O7 D0 F4 f0 o+ X& U - g.setFont(font0);6 x% c- K2 q* y. ?" F
- let str = "晴纱是男娘";
/ D( }: C/ H) v; G" S - let ww = 400;/ _& D! @% g0 q9 E' T& U9 Q, J
- let w = getW(str, font0);
7 d9 d; b& r3 @8 G6 k; k+ m* [6 t - g.drawString(str, ww / 2 - w / 2, 200);
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# N: {. V @/ d7 f7 K8 L" k- const mat = new Matrices();- j) }/ j4 c$ V! J% n. J9 T v
- mat.translate(0, 0.5, 0);+ a7 Z, I2 K7 U% L4 G6 p* a
+ X8 y4 V1 |9 p- O- function create(ctx, state, entity) {
& u' c i8 o4 `6 K$ @ - let info = {
4 I3 C, E5 e( P/ [0 w" M8 Q4 ^ - ctx: ctx,
4 U4 ^+ e, s& U/ y - isTrain: false,
( q1 Q3 t! {6 x7 G- W! D - matrices: [mat],
( O& ^6 |& S$ D& z4 Z6 O - texture: [400, 400],9 I! }3 T$ t+ V& A
- model: {
; L4 s" U/ V. X6 q - renderType: "light",; y% {8 m$ Q' v; i0 d' P
- size: [1, 1],
* Y* c0 P2 V) D4 k6 d5 t - uvSize: [1, 1]% P& x# c1 s& C/ k" P+ @
- }
/ p2 `3 k7 L- M - }' c6 N. K% [( l4 i" {
- let f = new Face(info); a. U8 p- M4 C# W
- state.f = f;
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+ t2 d( o% n/ l- let t = f.texture;+ v8 ^3 l& i8 p) l7 M
- let g = t.graphics;5 Y6 N$ V- w% F. E/ S
- state.running = true;+ u9 D7 Q8 k, M4 N9 z$ T0 P# l y, B
- let fps = 24;
: l4 i9 j; |' w1 r - da(g);//绘制底图
4 U" @" a" n. M, L+ D0 Y1 I% H4 q - t.upload();
3 k1 w) J# q3 L8 W7 ]) g" ~ - let k = 0;
+ [1 F$ i* F3 N7 o7 P& F - let ti = Date.now();
! _- B7 A) g6 Q - let rt = 0;: y9 a n& f5 ]& c+ k. C9 I
- smooth = (k, v) => {// 平滑变化( L" A% W/ x$ o) H
- if (v > k) return k;$ c/ ]6 B, g4 h$ A+ e
- if (k < 0) return 0;8 e# R) j% R, d0 P: ]5 w: O# \
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
' D# A# F0 G0 [8 | - }' ~0 T& w: J* X) ~0 g% X7 R( m: a9 ?
- run = () => {// 新线程
! I- n. Y$ _- r0 z3 t) D& R! i6 g6 Z - let id = Thread.currentThread().getId();
+ c. I; C' n j2 _ - print("Thread start:" + id);
" ?4 [( z2 ?- I( |4 X+ h- ^5 { - while (state.running) {- p; _( F* K2 u' i2 V- I
- try {
4 T) A( W x, d! ~ - k += (Date.now() - ti) / 1000 * 0.2;
" V q6 [% z j1 e8 H- v - ti = Date.now();
4 O3 |2 T6 w9 w+ s3 J - if (k > 1.5) {( h+ P0 n( u* m% `4 r& L& O
- k = 0;
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- setComp(g, 1);( h* i* B2 l6 L1 s( S
- da(g);' x7 U, \$ E9 U4 ?
- let kk = smooth(1, k);//平滑切换透明度9 z/ z0 C% _" X' j( {
- setComp(g, kk);
0 a1 n" i8 P' t- d6 K5 P* y4 Q - db(g);( j5 F" G3 c! f+ r( v
- t.upload();( }+ F( L. x& I" l x
- ctx.setDebugInfo("rt" ,Date.now() - ti);* }/ o5 c0 H4 A% M( Q" U* P
- ctx.setDebugInfo("k", k);. H5 |5 I2 l/ K9 W- T& Y
- ctx.setDebugInfo("sm", kk);6 {3 D3 k5 q2 x5 q8 X8 z# s
- rt = Date.now() - ti;+ q, k0 j1 n5 b, N
- Thread.sleep(ck(rt - 1000 / fps));
+ _* W$ T' Z, h% f! U# N0 V- x5 \ - ctx.setDebugInfo("error", 0)
+ ]! c! t/ n0 t, ]2 b" _; O - } catch (e) {& f z4 O3 Y: J$ U+ k
- ctx.setDebugInfo("error", e);( c9 v9 H& N9 }; m8 y
- }. D/ {2 w$ O; E. |; Q3 e
- }
3 {3 k9 g* U" G# ] - print("Thread end:" + id);
# m X" a+ \ e, ]. f7 J# k - }+ q2 E4 ^- n0 t8 c
- let th = new Thread(run, "qiehuan");
& T( U7 a5 p' H- f - th.start();
/ O3 d w1 h: B4 g - }
! P/ q* E' L/ b7 F9 L6 `& Q. N - 3 M4 R' w$ D. g4 V
- function render(ctx, state, entity) {
+ O- h7 k; n, t) i: x- x3 C% z - state.f.tick();9 u- h9 e+ w/ ]7 ^; ~
- }
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# @9 i5 N& Q, N+ D- function dispose(ctx, state, entity) {0 S" h" }/ o) R- j( `! S. m
- print("Dispose");0 u5 \! I! @% Z
- state.running = false;
8 j9 W9 u) K# p/ t s2 R6 O0 q - state.f.close();2 x7 r5 V1 m' G9 l# n
- }1 W" F1 v& E( T$ u& p7 ^: T
4 U% _/ x" a7 S3 p$ D- function setComp(g, value) {# E6 M. {" B4 ` Z# M
- g.setComposite(AlphaComposite.SrcOver.derive(value));0 Z: e+ G. k# [' o) z: c" V7 k: X
- }
复制代码 7 r5 M- H: _) ]
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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' z9 c: c9 U4 \: o) i5 Q顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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