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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。
" k0 E4 k u D' b2 K- importPackage (java.lang);/ o' H2 h/ Y( y7 g) P1 h
- importPackage (java.awt);" L U0 H( e) }/ _
- $ R) D6 b& F" r8 ^: E+ u$ O9 h
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);: e& x$ M3 v6 N# B8 d G9 s5 y
, Q9 @/ ~2 \; Z9 K! d9 @- function getW(str, font) {
7 S- f# [. L8 N0 O8 ]1 k - let frc = Resources.getFontRenderContext();
3 q: H: w1 _/ I+ Q) ~/ T2 m6 ^# q - bounds = font.getStringBounds(str, frc);7 a/ J) d3 @4 e6 ~- L" V
- return Math.ceil(bounds.getWidth());; q, N2 n" ~% w3 Q8 p1 p
- }- f; D8 S9 P& l0 o {5 i& z
- 1 S6 m& V _! I4 E+ Z# M
- da = (g) => {//底图绘制: Q+ U7 x, j3 V% b
- g.setColor(Color.BLACK);' ~4 k, Q7 U! f/ m6 ?) r! }' {! ?
- g.fillRect(0, 0, 400, 400);
: |% y- Q+ @( u+ l2 D - }
& Q, N' L$ K6 j; E8 p- j
, T+ A! M% Y! S/ O- db = (g) => {//上层绘制
8 F8 C- Q0 ` k+ H- _7 x' d( A - g.setColor(Color.WHITE);1 X: o- O/ ?+ d
- g.fillRect(0, 0, 400, 400);2 t6 x. m6 l* ]- n2 k0 N- n
- g.setColor(Color.RED);
$ j2 a4 `* t ?; Y* c# h - g.setFont(font0);" C2 p( P8 ^: ~% N& a
- let str = "晴纱是男娘";
* R; Z/ }$ G. s4 G - let ww = 400;
& Q, @, x7 F% W5 a, c r5 c - let w = getW(str, font0);
8 Q& h8 h* L( u+ ]7 {! o$ @ - g.drawString(str, ww / 2 - w / 2, 200);( N, e. p9 |4 }! \) m) F( f( f+ j
- }' ?4 b. h- V# Q
% W5 }& w3 s5 i$ l, Z; x. {7 a- const mat = new Matrices();0 R7 _4 x( d, _3 J% ^
- mat.translate(0, 0.5, 0);$ q5 g2 I' h' q4 p+ t' ^) A
: u" Q0 L$ F) y& \- function create(ctx, state, entity) {
& m) u4 f2 a3 X3 B - let info = {$ @4 E% b# @! l& H1 v
- ctx: ctx,' T! x) G: f1 r# c
- isTrain: false,
( d Q2 Q% k8 X% p( L - matrices: [mat],
: `% U: L0 N6 u- ? - texture: [400, 400],# b' A: P! N/ ?* m
- model: {
) S' U4 S7 L, A, b: b, B - renderType: "light",/ k2 ^6 G: k( d% R% t7 m
- size: [1, 1],4 u+ g' }3 C" y: q& f7 y2 X( m
- uvSize: [1, 1]
d- Q; ?1 B# ~& D1 p - }
4 E9 W( }7 ~" o6 [$ e - }
% F; q( O# Q& W. c6 G - let f = new Face(info);+ ~' s( @4 K9 Y: g' M
- state.f = f;4 X- e1 z" K8 j/ Z4 x: k3 l
. v7 T6 G9 v O- k- F# G- let t = f.texture;
: F( {3 K- G5 H+ C" @: B - let g = t.graphics;
0 @ W) m3 D+ f: |" `, H5 { - state.running = true;. ]7 X: G) F2 c# N% m* T# E
- let fps = 24;, q8 ]; s) H' Y Y" s0 C5 K
- da(g);//绘制底图9 o$ H& b, [# L4 E
- t.upload();
0 V( Y6 m, D2 f" p - let k = 0;
1 C/ Y7 h( i! S - let ti = Date.now();' ], [- Y q' T1 S& i& e6 ~! E
- let rt = 0;
! t/ d9 Q& Q( j - smooth = (k, v) => {// 平滑变化
) D+ q' E$ |# r g2 x) O7 `+ Y - if (v > k) return k;; m) u q u Z1 t
- if (k < 0) return 0;
2 S! z0 O( [( x - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;. K. v5 A' y% i2 V1 w' L, _+ {( Z
- }
4 T0 J; F4 k3 L$ q: e( D! Q+ M - run = () => {// 新线程
8 w3 w( j# `( J7 S0 I - let id = Thread.currentThread().getId();& |; T! B: w; Q) s) l
- print("Thread start:" + id);; O0 s& ?3 I1 k: \
- while (state.running) {
3 ~3 z- f# M/ u9 c4 k5 v - try { d' n( p L t) k# u V
- k += (Date.now() - ti) / 1000 * 0.2;
0 h* a6 ]7 ?; R1 T$ s j, _ - ti = Date.now();& |6 `- [; _8 }+ L K% @0 A
- if (k > 1.5) {( x6 H1 s( C% q- ^; Y4 T, y3 D4 \( Y
- k = 0;
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- setComp(g, 1);
* P& @: A: B" h+ v a. j0 S% i - da(g);' e" d, R5 b; w" a0 z8 z4 T$ d
- let kk = smooth(1, k);//平滑切换透明度
9 u$ P" x! g" e/ v, F4 H - setComp(g, kk);) {2 y# T+ Q$ |: [0 e
- db(g);
3 D: V4 C; |1 O, ?/ U - t.upload();
8 V) Q9 p$ @0 i$ Y# V1 R - ctx.setDebugInfo("rt" ,Date.now() - ti);6 [5 y" D7 P4 v4 |; U- q% `6 T5 v
- ctx.setDebugInfo("k", k);5 Y# b: {. p7 b' a" z" @$ W: d' C
- ctx.setDebugInfo("sm", kk);
/ V4 I7 e- n$ i4 g - rt = Date.now() - ti;$ ~7 ]0 F8 t. c$ K- p3 G! @
- Thread.sleep(ck(rt - 1000 / fps));# n7 z; c, `1 i1 R( I" _* x
- ctx.setDebugInfo("error", 0)
' M j8 r- g9 x# ~: x - } catch (e) {
3 m! K: c4 U$ C; @ - ctx.setDebugInfo("error", e);8 @* o; @, x; n
- }4 |+ Z/ V# t7 a* i- o
- }
" L/ K1 Y3 J/ p. X5 I - print("Thread end:" + id);
8 F* f- I7 \3 ]# x. v - }% g& u& F4 x& A
- let th = new Thread(run, "qiehuan");
& H) I K+ b2 L8 b - th.start();
( }6 v/ j, b5 h5 z - }
; k1 J: |6 N7 s2 L - $ j/ G% b' U& ^# C
- function render(ctx, state, entity) {* ]# T/ L8 O0 U' w
- state.f.tick();
9 I7 a4 W a, e8 L - }
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9 Z9 ]9 D3 U$ M5 n/ s% G- function dispose(ctx, state, entity) {
9 [8 F- z1 q# X3 m1 \( f9 O - print("Dispose");
: q. g5 D% d: j! F c - state.running = false;5 R P6 @3 f2 d- ^
- state.f.close();* G5 M# T, k' \
- }
- o& m2 e& M6 }( x: n H - 1 Y6 n, m4 U2 V# p' `$ O* k6 J+ K o. r
- function setComp(g, value) {: h4 x3 |3 o$ ]; t' O: G* @8 @/ n e3 ~. Q
- g.setComposite(AlphaComposite.SrcOver.derive(value));
9 ]! h& j: a0 x9 Z' [/ T/ _% d - }
复制代码 % l) d! f& {7 w% E+ u9 {4 ~7 w
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)
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