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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。: U6 v5 B* |. U& K5 s" U
- importPackage (java.lang);
; v+ w7 \, C* R9 L; U& z- E3 ~ - importPackage (java.awt); ]9 G% U: q" z
/ G3 e, g( C- E9 n4 L- include(Resources.id("mtrsteamloco:library/code/face.js"));
o p3 X8 s- t7 T _1 d& f4 n+ e! r - 7 p, [" ~. o" }5 q; r/ k2 {
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
. N: ]/ c8 [5 H$ s5 V4 r" D - 2 I+ W2 W3 w& x& @' g0 ]: R; V
- function getW(str, font) {7 }) P/ ~% {2 t/ Z. z
- let frc = Resources.getFontRenderContext();+ c% ?1 U# T. L& x8 U
- bounds = font.getStringBounds(str, frc);: ?8 c6 @1 V- A; n- W
- return Math.ceil(bounds.getWidth());/ y" w7 f, F A* ^8 Q
- }+ W7 d, v1 i* l0 _6 }' o) f9 Q
$ B# m0 t0 S( Y7 k- da = (g) => {//底图绘制
' Z0 N. U/ G6 |) z: f- R# n9 P - g.setColor(Color.BLACK);
/ W, i% \! @% a% t- { - g.fillRect(0, 0, 400, 400);
. {% I% h" ^0 P/ n1 u. d) @/ c - }
' D* X+ G; n) K4 R0 v - / T: g/ F3 k8 |2 \" Z& Q
- db = (g) => {//上层绘制- J' `& o& K( l, a
- g.setColor(Color.WHITE);
7 O! A; f) l# g" B5 q1 i - g.fillRect(0, 0, 400, 400);: P9 q+ e; B7 U/ U1 G, x
- g.setColor(Color.RED);2 F9 s. P( D0 V3 H7 I& u0 ~
- g.setFont(font0);
7 c9 a. u; R+ T/ Q8 s; x6 } - let str = "晴纱是男娘";$ g6 Q1 R; L8 h& z9 U
- let ww = 400;
: _; V9 E- L, G% `" v5 p! ` - let w = getW(str, font0);
- g+ P2 K3 S0 B2 ^ - g.drawString(str, ww / 2 - w / 2, 200);9 L8 n9 u4 f8 Z! o
- }( V- H+ m& _1 y
- 0 L" B( k; ~/ p v7 K* B8 B; a
- const mat = new Matrices();
8 y3 @& T" n: u1 J3 W - mat.translate(0, 0.5, 0);
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) P, q% {, n/ h5 t% L. K- function create(ctx, state, entity) {! x- A+ h6 t9 Q+ v6 ?4 k
- let info = {
4 W9 a. ]# |$ U2 t) b$ z% T6 C - ctx: ctx,3 M2 z& s0 g7 U
- isTrain: false,
9 S7 `6 d4 i: P% C - matrices: [mat],( H8 n+ T7 t) v. V9 W' J* T
- texture: [400, 400],: c5 s, o) S& h
- model: {+ |" v) {" I6 {% U) v, d
- renderType: "light",- X" ~/ r/ Y9 r8 q1 @8 Z. A
- size: [1, 1],3 M* H- |% t' ]$ a7 h: _
- uvSize: [1, 1]
# l" n; E( X& O# d - }$ u2 I; T4 B+ C/ L8 i# [1 S C
- }
; K# i! P( _8 X" Y; W - let f = new Face(info);
; \ Y4 L. \$ y# [/ ~ T5 l - state.f = f;
w5 w! n4 [) O, Z - # p* H5 ?4 x: f( B2 R" A, s
- let t = f.texture;
$ R: L& S" r% H1 g7 q4 J - let g = t.graphics;; q8 Q# T9 U+ G6 V- K7 U: X$ E
- state.running = true;
- D( F, c$ e) D - let fps = 24;
, h, R8 x1 }+ ~* N9 ]5 w - da(g);//绘制底图
) O5 E6 `5 E/ `& n& T - t.upload();
; L% [ V5 w' w: m% m. k - let k = 0;
% M0 D+ |& C6 I) ^! ` - let ti = Date.now();
3 N8 J4 U+ \1 l; |$ Q$ ?* S - let rt = 0;+ m! k5 X8 y! d% ~% H0 o* A. }
- smooth = (k, v) => {// 平滑变化% j: I/ k0 ^. c4 ~/ @
- if (v > k) return k;
! S, o* ^! e o( c' Y; c - if (k < 0) return 0;+ K0 [8 c- v3 ^6 g8 X: s( ~
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;- O% j6 K, O/ C8 V. b
- }8 y1 _8 P9 W* ` t
- run = () => {// 新线程
]7 m: K: g [8 V( J% H* s" c; h - let id = Thread.currentThread().getId();
, E5 X0 u8 s2 c. X/ J - print("Thread start:" + id);
3 p6 l$ K& A7 h% b - while (state.running) {
+ d% `$ i8 A" ] - try {1 `* m. g: m7 f5 B Y; \; M7 Q" ]
- k += (Date.now() - ti) / 1000 * 0.2;
6 |$ S% C. }/ M" \: A2 y - ti = Date.now();: u7 i( b0 X. d/ U( M1 F
- if (k > 1.5) {
+ N" U6 J' {4 J( X# u" ` - k = 0;
- P4 F I. P+ z9 e( ] u - }
$ L. [6 {/ |0 w0 I - setComp(g, 1);6 Z. G. y( v2 U% b
- da(g);5 {$ W4 N+ W, K% N) l1 ?, Z& |
- let kk = smooth(1, k);//平滑切换透明度# o9 ~% M+ M9 z! o. [9 s9 q' v- O
- setComp(g, kk);* D E* \* z5 M$ `" q
- db(g);4 J8 S n+ _& ? a. R/ h$ H& W8 s
- t.upload();' S/ C/ `. I. g
- ctx.setDebugInfo("rt" ,Date.now() - ti);; v- V$ j: [ J
- ctx.setDebugInfo("k", k);# R9 C( S3 S1 I6 b; }3 @; |
- ctx.setDebugInfo("sm", kk);
4 L5 l9 S2 H7 c - rt = Date.now() - ti;; a8 J, C; e S5 h& U& a1 G( }
- Thread.sleep(ck(rt - 1000 / fps));/ V7 _+ u/ N6 |
- ctx.setDebugInfo("error", 0)) l* N; y9 A o* k
- } catch (e) {
& @( t/ _* e: J* ~2 { `! m - ctx.setDebugInfo("error", e);
& e+ h: }% w2 B" [6 U - }
3 I' k. Q3 p4 P4 F% s! B3 [2 B# k0 Y - }+ c5 d1 @, _3 L) Q$ ~& \
- print("Thread end:" + id);4 \; A! \" I/ b$ R5 m' @
- }, g, H2 i5 n) w W9 p# P
- let th = new Thread(run, "qiehuan");
6 X7 x# L- C B# \ - th.start();% d5 T5 V* M5 R# S2 g7 D! {
- } ^$ x5 A( v# `4 m# G: a
1 L8 s9 m9 T' j1 I2 c! W) d" a- function render(ctx, state, entity) {
. Z$ |( W4 E( O0 g - state.f.tick();
% }: E1 I/ q" ]8 F( `7 O - }
. z# P5 |* U8 ^6 K0 C, ^" s - 0 I7 F8 Y, p" q/ N. e% w+ J
- function dispose(ctx, state, entity) { c; r! F1 o; l* t
- print("Dispose");
9 |) M$ H6 F0 {) H, s. i3 m% b5 x - state.running = false;! M4 L/ T9 O& X5 P9 G
- state.f.close();
4 m( Y4 n5 b+ e" z' f' O6 F - }# c6 s. C) x, n8 }% ~/ h. M) y4 T
- 5 l9 _0 Y7 f/ x6 _- X; O, M$ r
- function setComp(g, value) {
. Y4 @6 h Z- O1 |' f, Y - g.setComposite(AlphaComposite.SrcOver.derive(value));
1 b9 Z1 g, H2 T+ l# ?- C2 Q - }
复制代码 $ M9 `8 e+ J( e6 _- l
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。' L; j$ R% g W. \
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+ a- w e* D+ w0 V2 x
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)* {: I2 U) S3 J. V; L* i- G1 t" b+ t
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