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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。) [& U& I( @6 Z9 `! t' B1 ?' k/ g
- importPackage (java.lang);
9 g! V% C D+ H+ _7 N% M, F - importPackage (java.awt);
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; d7 |7 H: d" D, ~( B Y# z# e- include(Resources.id("mtrsteamloco:library/code/face.js"));
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1 X Q- J7 ]! \* ?4 M* S. O( h% ^- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);6 |! i- V+ v/ _7 S- d
- ; v( S) @, e& J# S
- function getW(str, font) {6 }% Y6 u/ |6 N( Q5 h
- let frc = Resources.getFontRenderContext();- E% T* Q; s3 p
- bounds = font.getStringBounds(str, frc);( f' P, _. o9 U# W5 k5 m/ [
- return Math.ceil(bounds.getWidth());% \1 |/ _+ f4 U0 Z9 v( M
- }
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- da = (g) => {//底图绘制6 n! P& Q$ c. J% m, H/ N2 t* M9 R
- g.setColor(Color.BLACK);
" z4 u0 P- [7 s f' ^/ O - g.fillRect(0, 0, 400, 400);
. D7 D* _# N$ f0 m% [& S - }
) V {9 M# y; s3 Q
% C' Z+ \, T7 ]* N, o- db = (g) => {//上层绘制
- i1 o( Z+ \5 a- { - g.setColor(Color.WHITE);/ }* r' J3 J4 A. l
- g.fillRect(0, 0, 400, 400);5 P4 @% n3 E+ g L0 y$ h# i2 L3 M! L
- g.setColor(Color.RED);( O& @$ X s) P9 B6 K* W
- g.setFont(font0);$ k. l8 x' J% }5 B
- let str = "晴纱是男娘";& |1 ]6 z/ F1 ^7 {* G
- let ww = 400;! g7 k" K# V7 u- p" q! M% V& d g x
- let w = getW(str, font0);
: M4 }* O |7 X' ?! R - g.drawString(str, ww / 2 - w / 2, 200);
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6 n q' O, ?1 j4 G. j- const mat = new Matrices();) r- \( f8 J9 C' `% T' A8 \
- mat.translate(0, 0.5, 0); C K- z) M! u3 B! d' d
- 7 c7 r$ L. M7 m5 ~: m8 k1 D
- function create(ctx, state, entity) {
% v/ w- W$ J& C5 q: d - let info = {
1 i- ]5 ^7 `; Q: ~, t - ctx: ctx,$ M( N3 P+ p% [: Z
- isTrain: false,
3 `- e1 O/ ?+ ?! H; \; F( m - matrices: [mat],
8 y% t; N( m5 [- J" z6 ], z - texture: [400, 400],; a& D' z! o. O# C8 k+ N' e. t" t
- model: {3 s7 R: B6 d+ ?9 e, y! E
- renderType: "light",7 h$ F! i+ _/ d) v6 B; ^& H; l( g
- size: [1, 1],. N: I! G* r0 R, n
- uvSize: [1, 1]
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- }
0 [9 p7 L D' ^) C: @9 O( w - let f = new Face(info);: S$ f+ G; |5 C6 o$ Y1 ?/ |
- state.f = f;9 d( i% N) F" O$ R9 N( D- Q
* W- q1 G, f, l. Y- E* @- let t = f.texture;8 M/ t2 |/ |8 f9 P; \
- let g = t.graphics;
& |9 S7 m0 s6 o+ M - state.running = true;
3 k; K1 w- e! p% K - let fps = 24;
# B/ ?/ r/ T8 A - da(g);//绘制底图, s; H( b$ t( v$ y) f6 r. O
- t.upload();3 E& r( r8 t9 Y h0 s9 E" M, O
- let k = 0;8 v0 r1 t0 @5 c$ z8 z' Y3 q6 D# b
- let ti = Date.now();
6 w8 O: ]4 O# X+ v% m! d - let rt = 0;, C8 c9 D: K, |. \
- smooth = (k, v) => {// 平滑变化
5 M6 {: G% c+ Q( T - if (v > k) return k;9 L% a! a- ~8 [
- if (k < 0) return 0;
# U* X3 P) y6 \8 e3 C+ U - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( i4 S( O! m! L& c
- }
- a1 y5 P% k! ? - run = () => {// 新线程
& E# a0 V/ D6 o6 ` - let id = Thread.currentThread().getId();
4 i3 o* C e8 X - print("Thread start:" + id);
" k, x" i+ L0 D; s - while (state.running) {# k7 h; `0 a9 d( ?0 A1 N6 |, j
- try {! C \' n$ U4 V5 u; P1 t' Q
- k += (Date.now() - ti) / 1000 * 0.2;% E) W, z5 Y, w- ]3 [6 L0 K: [
- ti = Date.now();
" F" {/ P6 q+ Q) z, p - if (k > 1.5) {
/ f ]+ o- [ O% M - k = 0;% v7 v0 I s! m' X% `( ~' `
- }
8 ^2 O7 J6 ^; p( G5 S$ M - setComp(g, 1);- c) Z, Q$ z0 b& D
- da(g);
9 a& n" A2 d i$ d) h0 J. M- I% I; B - let kk = smooth(1, k);//平滑切换透明度
/ p4 m1 M) M/ }* y! R1 N8 r/ N - setComp(g, kk);* ^1 [: ]- L* ~0 S
- db(g);
2 _ K! `" Q) T1 n - t.upload();/ z/ |' Q6 A) u3 {% ^& \
- ctx.setDebugInfo("rt" ,Date.now() - ti);; C2 Z; D, Q- E% U: B9 W
- ctx.setDebugInfo("k", k);
# Q/ v, Z: M4 ^ - ctx.setDebugInfo("sm", kk);# m, k9 p( V; x+ g! e0 N7 ?
- rt = Date.now() - ti;+ _! g' U& r- M2 p/ p, @
- Thread.sleep(ck(rt - 1000 / fps));* F3 I- a6 Z% |# i
- ctx.setDebugInfo("error", 0)& _1 z" X2 d3 R/ X0 {: W
- } catch (e) {
+ @! w7 f# g! n( ^1 A8 S - ctx.setDebugInfo("error", e);
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- }+ p5 ~3 F }" ?
- print("Thread end:" + id);
/ D: }2 X% Y0 K - }
5 u9 F% F$ d9 a, U3 E - let th = new Thread(run, "qiehuan");) \# J @# d, `
- th.start();9 A, H4 K2 x# c2 M
- }
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- function render(ctx, state, entity) {$ S( y3 r* ?. N- X2 `4 S9 `
- state.f.tick();
; r! |, O: a$ }% q - }
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- function dispose(ctx, state, entity) {
0 F( F/ v1 C4 f/ U9 o/ z - print("Dispose");
' ?0 s' U, d7 E. d: s - state.running = false;# G* G$ L V5 M A, t
- state.f.close();- l. F. F' X/ K" N1 {' c
- }
1 M! _) d( ]( V. t6 D. W+ `/ }
8 d+ i8 ` F6 c$ l& ]- function setComp(g, value) {
0 {! r: P8 U% x- q8 p2 @5 r - g.setComposite(AlphaComposite.SrcOver.derive(value));
9 s, |; b n7 [7 M - }
复制代码
( q; ~8 g, u; ^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。" L4 E* c. V" N5 j6 Q V) W# H
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' V+ h% g4 X* i- J+ E1 j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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