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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。
( m) [$ Q% u: W7 X- importPackage (java.lang);
) c* k$ k& U1 I3 u: H8 \6 U - importPackage (java.awt);# j3 |; i! m" }% [; |' L
6 w, z! S$ \( p1 @8 W$ F1 q" E9 ^- include(Resources.id("mtrsteamloco:library/code/face.js"));
2 P. i) d( T+ F w - - ~6 s# u. T( o }
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, O, n, ]2 M* R- K
- 3 Q1 G& M- q( c& V3 K8 v
- function getW(str, font) {9 K) ^% W- V9 V/ F$ v5 r, k
- let frc = Resources.getFontRenderContext();2 I! _$ W) U% e6 l, n/ z# Y
- bounds = font.getStringBounds(str, frc);, _4 |3 R% @+ f
- return Math.ceil(bounds.getWidth());
. ~6 w6 H" U7 `+ H - }" v z$ o. s! {: c1 J) ?2 C+ a6 a p
6 C* _* V8 q( e7 `- da = (g) => {//底图绘制
' _# m. d2 h- z0 J% o8 W - g.setColor(Color.BLACK);
; k9 X) n( C2 l3 T3 E - g.fillRect(0, 0, 400, 400);6 l3 L. {* i2 ]( U
- }' a5 C7 a" |% l! q( t% ~+ N6 O
- k1 j) D5 S, R$ x' q% }5 C
- db = (g) => {//上层绘制) ~8 D- F+ w) H1 J! X
- g.setColor(Color.WHITE);
: T5 t) Y* O0 J, [7 t1 [ - g.fillRect(0, 0, 400, 400);
A& u8 n3 w9 B3 y/ d1 _ - g.setColor(Color.RED);$ _7 e3 b/ D: h* M, U
- g.setFont(font0);1 ]8 V$ C! t7 j2 s9 Z" ?( ~
- let str = "晴纱是男娘";
( \ u% [6 ~2 N! ]* ] - let ww = 400;9 {5 V% A6 [, n* Z
- let w = getW(str, font0);
2 @) `# m7 b) t/ J$ A1 S7 ]+ j - g.drawString(str, ww / 2 - w / 2, 200);2 j; U0 G( y- t
- }
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9 I" a6 m% ~% Q, o- const mat = new Matrices();+ a2 u4 \2 @0 w6 [! O
- mat.translate(0, 0.5, 0);5 S+ u. ]. G0 e# T- ^6 t: O3 e1 u
- , h! |8 q8 F0 Z" i' ~
- function create(ctx, state, entity) {2 [) B( k R% F- y0 u
- let info = {
8 P4 g- z9 G" P" S8 g - ctx: ctx,
% ~% N3 e0 O) {+ ~/ A3 A6 i+ E - isTrain: false,8 S; G2 l6 y1 x% |* b; u, S! ^3 a
- matrices: [mat],! T1 p) o! h& J' e, I
- texture: [400, 400],
3 M7 v& l0 Q7 z0 A - model: {
5 ]3 m- U% K9 X( g - renderType: "light",
- M+ T/ K5 W4 q1 K. T7 D9 H - size: [1, 1],) {1 W6 U* ~$ X5 ~! T$ L
- uvSize: [1, 1]2 o* @ e/ {2 D' q1 Y$ t/ k
- }# e8 Q3 [* h: C- g! w
- }" G& G. T) G- B2 a1 p& O" m
- let f = new Face(info);" [2 \% y3 g& j- ^) l v7 _- H
- state.f = f;
9 ^+ j) f3 @' T2 t) o
1 @; D6 n/ ^1 t S3 C( r+ V; n9 K4 \, n- let t = f.texture;
: [. R& H" I9 y$ i: _3 x - let g = t.graphics;
+ o9 K5 Y* v9 M% h" Y; W - state.running = true;
. G4 Q$ T4 }2 C- x9 s - let fps = 24;
8 C/ T/ ]+ L) {6 L - da(g);//绘制底图2 _: `* i* ]; N! A
- t.upload();
# g9 n0 r" z3 X# I, R! g - let k = 0;2 @4 w% _( q1 x" Z" W2 h% O$ t
- let ti = Date.now();
; r8 o; z9 v, r) w( X9 {2 I - let rt = 0;
4 t- J' |% }1 t! T- a- o7 q& | - smooth = (k, v) => {// 平滑变化/ l# O/ J. K4 |; C& D
- if (v > k) return k;
' k* x3 r; q0 ` ]; |# c - if (k < 0) return 0;0 I8 g/ {8 H" b/ k; u' Q5 C/ r; a
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; i/ |; S7 C! k/ K x8 m3 E# D6 a
- }
" a% z8 I/ l7 u' v, f# h- S - run = () => {// 新线程' `1 y6 {8 q) n
- let id = Thread.currentThread().getId();8 a2 y) K; d0 H, J" S1 J
- print("Thread start:" + id);! {. Y3 q7 o% j' A+ L& I
- while (state.running) {
) @2 O7 ^5 y- N- a! M - try {
# ?, g% e6 m; O; n1 `6 D3 Z - k += (Date.now() - ti) / 1000 * 0.2;7 T3 j" Y) y& ]1 E- D
- ti = Date.now();
9 V0 y- e& n3 b9 q7 K. u5 n - if (k > 1.5) {2 k( N/ l' A ?5 M5 q! }0 `3 q7 f
- k = 0;, q3 P `& s) K( [- n H" |
- }3 i8 v5 g/ d& u. B5 A) `. p
- setComp(g, 1);
( ]3 P6 s6 F: ^5 ?0 @4 b - da(g);
9 Q) Q" N* f, p/ L d1 P - let kk = smooth(1, k);//平滑切换透明度
6 @* v% E; v! a - setComp(g, kk);& \2 a( V6 f2 Z( Y4 M: l
- db(g);' z8 P5 i6 j0 ^2 X" i% Y" N4 n5 N9 o
- t.upload();
; t1 s6 M) r, ~ - ctx.setDebugInfo("rt" ,Date.now() - ti);
% ]7 }3 ^7 V- _1 _ - ctx.setDebugInfo("k", k);
: d9 ?9 @( S, b! y2 y5 o - ctx.setDebugInfo("sm", kk);) V x8 `' Q4 x
- rt = Date.now() - ti;: y* g% o( p% J4 |$ t. I
- Thread.sleep(ck(rt - 1000 / fps));& A: w+ f- J# [
- ctx.setDebugInfo("error", 0)0 P' [% v" [9 C4 [) G5 D
- } catch (e) {2 W6 M, T$ D) F" h* Q, @6 R
- ctx.setDebugInfo("error", e);: x" ~! H& l, u7 L2 F
- }
4 ~& h; }' `5 m, h - }
: o0 s& s b( U, |0 S- S% _ - print("Thread end:" + id);5 n; R: v% [7 q
- }
2 Q* a% o+ q- d0 b7 @6 h - let th = new Thread(run, "qiehuan");& d; J/ {2 J0 }( R
- th.start();6 F6 N+ P& l+ K) ~# A$ \
- }
7 [- g: c+ E' Z; H l1 d$ Z+ z( i - + \: o8 x& Q, L
- function render(ctx, state, entity) {
7 D# p" {: }/ E8 t' P - state.f.tick();: A3 G8 U; m1 ~; U/ A
- }# y- ^. x; [$ c C' G: `
- . {& ~; v5 b0 k9 t' o; Z* p6 U
- function dispose(ctx, state, entity) {5 ~/ c% S: k2 i
- print("Dispose");
8 B$ m# ^2 C- S+ { - state.running = false;
' M0 I, S8 E) } - state.f.close();
" C' ~9 V" d3 {. D6 p* c. O6 Y) | - }
- T6 n& H3 F' W. q/ g0 ]5 M; _+ t
$ r" d7 _& _7 ?; t9 f+ e& |- function setComp(g, value) {
1 V& T$ [ _* Q! R - g.setComposite(AlphaComposite.SrcOver.derive(value));
& i* z9 j* R# m6 A, o9 w7 O" h! m - }
复制代码 - c3 g) v* V1 d9 m
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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) z$ b5 @/ }" ?( U顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)% g8 Z- N7 f6 K! l, k) ]
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