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7 A& A, o6 f' m u0 Z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。' o6 q) d8 m$ ~1 x/ O7 p( r$ H
- importPackage (java.lang);# l, w+ Z$ f9 D: l
- importPackage (java.awt);8 K6 }& _% n$ f) T" G+ w1 n
5 o5 ~, S; V5 E! Y* U. e+ F- include(Resources.id("mtrsteamloco:library/code/face.js"));3 [# w# Q' X! [8 n( A
% [9 K8 c7 w, |- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( K, [( Z3 Z# I, r
3 f1 |2 \1 h I# e# i! e2 r) _5 D- function getW(str, font) {5 Y2 d: L4 O* s& H' c
- let frc = Resources.getFontRenderContext();
' R: J) \9 x- `; p8 R+ ^/ v' {3 Q7 F - bounds = font.getStringBounds(str, frc);
( {. n- V/ U1 V - return Math.ceil(bounds.getWidth());0 F; E0 `. Z$ h) b; c. W% d! {
- }
' B9 p7 z+ z# |# P( a/ r6 g) @( S - % k/ c+ T1 T- v: h+ ^( H/ C( d
- da = (g) => {//底图绘制
5 C% @. Q3 R; k7 Q/ N6 V% Q - g.setColor(Color.BLACK);4 l/ D: E* f7 ^& B
- g.fillRect(0, 0, 400, 400);1 B0 a; {( o) [! i* f; r% o
- }
6 ^4 f. u! S2 R/ H - 8 w$ x4 h, g' y; t
- db = (g) => {//上层绘制
" B8 `) u* k! d4 c- G }5 V' A e - g.setColor(Color.WHITE);1 y K* V2 U6 O( @
- g.fillRect(0, 0, 400, 400);
% [/ s! [6 I. W0 _2 y - g.setColor(Color.RED);! f$ D& @- [: T+ e0 u% r
- g.setFont(font0);
- K0 A0 H- u' S# a - let str = "晴纱是男娘";
/ F* o1 T( p p$ I - let ww = 400;/ f, n& J7 v, v, J& V7 Y
- let w = getW(str, font0);
! k6 Z( c% E1 x1 G - g.drawString(str, ww / 2 - w / 2, 200);
3 I& p# E: @% i1 q& U3 l+ O( B" ] - }
3 {# f" `" e4 z - " _; E) ]8 K. I6 c3 _& ?
- const mat = new Matrices();0 Q/ _0 d- I/ H" V& F! f
- mat.translate(0, 0.5, 0);" @6 u# ?- a6 ]+ O
- 3 \ n3 r2 I( \ H" G. l! f% b
- function create(ctx, state, entity) {
) N; B, H9 b) u" S) E - let info = {
( V' D; Z ?% u5 {9 `& B - ctx: ctx,
4 V, b: ^- u7 e# F. l0 [/ C - isTrain: false,
- D& @' w8 R- B - matrices: [mat],
. A* @( u' q/ l- q0 u& Q8 c - texture: [400, 400],9 {+ ]: Z5 | L' X
- model: {
$ f; a0 o o, V6 z - renderType: "light",% Y! g* E) U0 J% M- {* ]0 A0 K
- size: [1, 1],
) i! f- M1 n* G+ k. { - uvSize: [1, 1]
. `; z- O6 [ y/ E - } ^7 S h' Q" p$ Q6 ?
- }, Y" r+ ^8 k" g2 t: H! x0 {
- let f = new Face(info);
3 P# J* N) n. E$ K1 } - state.f = f;
% X+ e6 a' ?" M: y - 4 h% L9 N9 s* R- {/ m
- let t = f.texture;7 [% x, Y) L, g( w! b' v; D, U
- let g = t.graphics;
" g+ F4 l2 N2 G! I- _ f# _ - state.running = true;* M, v; {/ }0 Q7 F' L
- let fps = 24;2 w/ d. z& E4 U0 K" \
- da(g);//绘制底图
* o4 p" l, U9 v0 t7 g - t.upload();( i7 u) I: N- A2 ~
- let k = 0;. z, L! I; D2 ~' o9 n
- let ti = Date.now();
& w. @; u4 {% }' g. K, P/ b - let rt = 0;, ? |. w/ L4 b2 H) j7 B8 y* {
- smooth = (k, v) => {// 平滑变化4 v S% D7 c/ J% K x
- if (v > k) return k;. f. u* p7 m/ V& D# \# I
- if (k < 0) return 0;
/ @# Q" }0 H) J, x! c; |* k! O - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;! i& g' C# L0 p. v; M! _
- }3 Q9 o: c V) }5 {
- run = () => {// 新线程0 M" z) P8 k r5 L1 z+ ?. S
- let id = Thread.currentThread().getId();* I- h/ } G0 ~$ a
- print("Thread start:" + id);
2 H: z5 a$ a, n5 \; t - while (state.running) {! q6 e# A6 o! G1 x7 l: G
- try {/ V8 G" v+ M2 p$ x6 m
- k += (Date.now() - ti) / 1000 * 0.2;8 a I) D+ _' q* b7 S
- ti = Date.now();% ]4 U$ x) \$ ~% V. |4 d: z
- if (k > 1.5) {
2 v5 a9 K, m+ k6 C9 f; \ - k = 0;: Q& U/ R* I& B& F/ N
- }, M+ K) D- W3 z
- setComp(g, 1);
6 i" q) X0 m9 a/ |. P - da(g);, E+ B0 u8 C+ c) l' k% r7 {; w1 J
- let kk = smooth(1, k);//平滑切换透明度% j3 [, }/ ?# A1 G
- setComp(g, kk);; x- ]( m; J; H
- db(g);$ w+ ] J( J6 q
- t.upload();' }' c3 k j: Y8 e
- ctx.setDebugInfo("rt" ,Date.now() - ti);
" o4 x; m! E: D/ j - ctx.setDebugInfo("k", k);7 {( {. j: D0 S8 N% s
- ctx.setDebugInfo("sm", kk);
n) x) R$ Z# l2 P - rt = Date.now() - ti;
# l2 d) |7 i J: d, h/ V$ f - Thread.sleep(ck(rt - 1000 / fps));: y# z& c, Z6 x, Z
- ctx.setDebugInfo("error", 0)7 j6 z6 y6 G, b ?9 U, [& h
- } catch (e) {- ^3 D* h- x/ E$ j. g# x
- ctx.setDebugInfo("error", e);8 k; V- N9 c1 @+ |
- }
' q: Q* S& _' E - }. ] t# `" h. D) B0 D
- print("Thread end:" + id);
7 g3 x6 t: N. u- K! \ - }4 D+ {0 ?& U& x( A. p
- let th = new Thread(run, "qiehuan"); j( f7 ^8 M$ H$ m8 R2 C
- th.start();
! G% g5 S( @$ p5 y* M* X - }5 f3 o% l6 h: X# @
8 J7 D' D6 p0 c% S3 i- function render(ctx, state, entity) {+ I, R& C8 o# y! ~
- state.f.tick();( \) m! C. e* K- v1 ~
- }
; K# \5 S$ z1 g+ A, i! d
5 R7 h: o$ N$ X+ F3 {- h- function dispose(ctx, state, entity) {
9 z2 }% w; Q: W: U+ Z' D - print("Dispose");
6 q: T( z; g8 c9 U& Q - state.running = false;% A1 N; d5 S2 [
- state.f.close();7 h5 g. p2 x% _4 Q5 n# K0 K9 f O
- }5 w* B# M3 l: b3 G1 p3 L
- ; Y) E9 |0 Y. f4 o; H
- function setComp(g, value) {1 R$ u& t0 T) z& z) \6 P( Q
- g.setComposite(AlphaComposite.SrcOver.derive(value));
8 \: K* v6 d5 s# `9 ^! p3 Y - }
复制代码
5 ^( J% \0 p7 |" g! O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。
) ?7 a1 f. F: q9 E2 H& J( {
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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)) \/ U7 A# ?* K/ y+ x8 t- i* n
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