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- L; m8 G, A9 i) e8 ]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。
" V$ x4 G% c7 K3 {; O$ y' H }- importPackage (java.lang); z% [& _- ?% X. |0 N- t7 U
- importPackage (java.awt);
) G- s. w- _3 E4 H
- j1 W$ C/ |$ k8 W% a: J+ _+ {/ r- include(Resources.id("mtrsteamloco:library/code/face.js"));1 G' y/ z* Q% z
, j+ M5 `7 E9 p% E0 C8 O- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
2 l, u# Q* h( ? - ' k& z4 z6 X- g
- function getW(str, font) {, I" C0 @1 W0 E5 N
- let frc = Resources.getFontRenderContext();- m9 u* n# j! [" a& v# u+ ^, o% k2 Q" [
- bounds = font.getStringBounds(str, frc);( e9 W) b2 ~& r+ f* E3 m
- return Math.ceil(bounds.getWidth());
, y% n7 {" ]$ N; L! a$ s) e - }
5 n. X- X' t l5 Z. ^, m& e - 5 ~9 d5 X. n: W- F
- da = (g) => {//底图绘制
7 v/ I4 t5 u6 ]0 Z5 q2 m - g.setColor(Color.BLACK);
( N" ?4 ^" E8 P2 M% ^; ~4 U5 o2 Y - g.fillRect(0, 0, 400, 400);7 Q# V& k1 H+ @( t% A
- }3 @+ j3 Z4 y* I) o1 W
- 3 o/ G: J: y8 t$ w; b$ L
- db = (g) => {//上层绘制( w: ^! U/ ~/ e! f; S' q
- g.setColor(Color.WHITE);
/ |8 s$ r9 {3 H0 _7 J - g.fillRect(0, 0, 400, 400);
3 _6 z; }( n; ^( C& d - g.setColor(Color.RED);
9 y' J4 _! U$ d |& P+ M% N* ^ - g.setFont(font0);4 @0 b: e# N& u1 d* X6 `
- let str = "晴纱是男娘";: m9 U' k' z" ?
- let ww = 400;" n! q" n, h' A# L' y# B
- let w = getW(str, font0);- g3 |! X6 o7 t; l3 ]3 m' W6 H; g
- g.drawString(str, ww / 2 - w / 2, 200);1 y6 w0 ~0 n3 H" L
- }
/ q+ Y2 h! N T$ h4 f - ' \& H3 t2 g/ f. r% Q4 N7 C
- const mat = new Matrices();/ @* m) x+ k# l4 h& ~
- mat.translate(0, 0.5, 0);) a% _5 ~+ D% |; W5 l' F9 i$ A
6 P8 d8 t6 \+ G7 t5 u- function create(ctx, state, entity) {
( z! i6 J) n0 z$ o4 h$ M - let info = {
$ X7 h! S* `& ?; W' { - ctx: ctx,
" ~! q. u+ K+ W7 _0 R V - isTrain: false,9 c5 j" h3 ?- F+ [! }5 p/ C) ^) h
- matrices: [mat],+ o" W% f. T9 h; V
- texture: [400, 400],9 s) I$ s7 l$ D) }" U1 W
- model: {
* m* J' T/ X F' v* S - renderType: "light",8 G4 n3 o- u: ]$ t1 i6 @+ F, J6 O
- size: [1, 1],# O/ t/ C- J$ F3 ~4 R) z$ m
- uvSize: [1, 1]. W) n+ Z' `/ n, j5 K
- }
8 F# O2 f% ^- U7 r - }
) e5 e. @7 y: \* C( J - let f = new Face(info);
, z* `. F9 {1 x$ P: x0 T. O - state.f = f;" P2 X! _3 W* o2 A% G" C
3 ]7 i" T. U5 H$ q# h) ]! h& H/ L- let t = f.texture;9 g; v5 ]/ V" M( m
- let g = t.graphics;5 N. D/ D1 S* j
- state.running = true;
' ~+ d* E' S' E8 X& `8 V b - let fps = 24;& |4 S- N! A! u: E, D l7 e( y
- da(g);//绘制底图) A) R- c1 k4 l8 l- f
- t.upload();
" K' d1 B. P6 `* p b - let k = 0;
! E$ c. z1 k3 o; x( A - let ti = Date.now();! i+ R3 R3 \! \7 _, m/ y/ `
- let rt = 0;3 Q1 I& @) S7 M" B# y
- smooth = (k, v) => {// 平滑变化
1 g4 s1 Q5 w* ^6 l3 A2 |" F& x: O - if (v > k) return k;, h* T" U7 G% G2 i, k. R1 i' e
- if (k < 0) return 0;! m4 X3 z7 u$ r( A0 e
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;, S R9 j0 p( `0 O! @( x# s A+ Y
- }
4 [9 g% u, e% x5 w, J% Z7 l - run = () => {// 新线程& f6 `0 k0 Q% ?% x
- let id = Thread.currentThread().getId();/ C. b/ J, P; |& t$ d2 |7 w
- print("Thread start:" + id);; B! H8 O! ]+ Y# Z/ b
- while (state.running) {
$ P. u4 w- q6 T! ^ - try {
$ E1 c$ G' u. _$ M# f6 {* S6 F - k += (Date.now() - ti) / 1000 * 0.2;, E( ^: O$ a1 Q2 F* }/ m* |: V
- ti = Date.now(); @( v1 ?4 e8 n
- if (k > 1.5) {* }% }, b2 `% F2 d: Z
- k = 0;
4 W/ ~/ U" y( d - }: y l) i" e# p! ^) t. |6 C
- setComp(g, 1);/ g. g8 b5 S) s5 A% _/ ~! J! j& P
- da(g);) l- z4 |2 Y4 E2 _5 h: n% ^, C& d- ?
- let kk = smooth(1, k);//平滑切换透明度/ ^7 f6 |$ z; {* P5 Z
- setComp(g, kk);) i0 a$ X$ w" ^5 E$ ?
- db(g);# C& l) q }# z6 X% R
- t.upload();2 F( v1 A, B9 D! G: U
- ctx.setDebugInfo("rt" ,Date.now() - ti);
# ~) d, ]. G) l0 @ - ctx.setDebugInfo("k", k);
% s- ~+ ~4 V. R& o2 { - ctx.setDebugInfo("sm", kk);( S4 E& J. H2 Q- m% X, X+ ^
- rt = Date.now() - ti;
; I/ T* ~# e7 u0 N - Thread.sleep(ck(rt - 1000 / fps));
+ o8 |2 d( n# V! p5 ~# T - ctx.setDebugInfo("error", 0)
6 k% |, y- j# @! P4 J: A3 S, }$ v - } catch (e) {
6 B) z3 R! b& e8 ]0 [ - ctx.setDebugInfo("error", e);1 @/ f" x2 K" p% x' D7 ^+ |
- }8 ~3 A. g/ i6 z; i- ?
- }% `. t' f* X6 J, Z
- print("Thread end:" + id);1 ]; v6 ~/ f5 y: x, H( J
- }9 ~' o/ e7 z8 }" M5 l+ l- i& V
- let th = new Thread(run, "qiehuan");
+ B& Y/ d8 C+ |. s( \0 ~ - th.start();1 i% I" Y% C& a& t/ B
- }
# z# n( \0 \1 I# l+ z6 I& }
1 M9 E7 u4 k9 X% j( h) `% N' d- function render(ctx, state, entity) {
& b% ?, K& i9 k2 N9 l7 @9 P - state.f.tick();
/ P7 |( k& m# ^0 W; \ - }
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- function dispose(ctx, state, entity) {; J- M6 L% t& X+ E$ I* X, f5 v5 W
- print("Dispose");+ F3 W7 l+ K2 e2 t" I+ [
- state.running = false;
2 [5 L# O3 P. s8 N - state.f.close();2 r" N: N1 D `' [( [% R* ~8 s# |
- }8 h% N M7 }; `8 _: n
- , H/ M2 s E q& \' S, ~
- function setComp(g, value) {1 v% g1 C3 C, w9 ~7 l
- g.setComposite(AlphaComposite.SrcOver.derive(value));
# z- M0 H9 v6 h+ V% q- h/ t7 ^' F2 y# Q - }
复制代码 4 u% k+ r1 ?# }* ]
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。1 E" Z0 c/ R9 q' }
' p5 Z" I" a: ~
+ y) u" E" |/ ]2 E. J$ F顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)& l0 I2 }2 J/ m9 ^
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