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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。2 i0 q$ ^7 o0 {3 l1 G( E; X
- importPackage (java.lang);2 N' |+ X& N6 S* |
- importPackage (java.awt);/ t% ]- c p' F9 t6 |3 {
- # k% Q4 ]* Z3 N( A7 V+ e' Q Y
- include(Resources.id("mtrsteamloco:library/code/face.js"));+ ]& k1 l+ {3 n T' w
- . ^; n: L5 W1 d% e
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( Z# q$ M, }2 \6 d+ G6 b( H
/ E9 i8 o3 ^$ S( w8 K K: l# y- function getW(str, font) { p" P: y3 v$ @, }% N; B& J W
- let frc = Resources.getFontRenderContext();
1 W- Y' N1 ?: ]/ [7 K# P) V* \ - bounds = font.getStringBounds(str, frc);; K$ L6 E; r$ N! L& [! y0 V
- return Math.ceil(bounds.getWidth());
! I6 c# C2 Y) Z0 ~ - }6 N5 } |$ H6 u
- ! S; `7 T9 N# Z2 R5 v
- da = (g) => {//底图绘制4 c! g( B% [9 k5 v3 u5 Y, O
- g.setColor(Color.BLACK);
/ V! N* G9 \) p3 E: v6 e( K$ H - g.fillRect(0, 0, 400, 400);3 f( Q& g* F" Q& @ H5 V5 Z
- }- ^& J4 b2 ]. Q9 X5 e% E3 j
$ H1 X1 [+ h) S- db = (g) => {//上层绘制
. o6 ~1 q- f, @ } - g.setColor(Color.WHITE);
6 s6 I8 K; _# n! t+ W% m) M9 T - g.fillRect(0, 0, 400, 400);% q# |* W# [' C$ m3 r6 }4 E4 J
- g.setColor(Color.RED);8 O3 m5 X0 Y0 P
- g.setFont(font0);
9 {' O' S( M8 L5 u- B( X: r& l - let str = "晴纱是男娘";
3 u7 @( f) b, s1 {/ X r* { - let ww = 400;
" s% N+ ^% n ^! O) c# M' N7 c - let w = getW(str, font0);- K6 V2 A! k* Q
- g.drawString(str, ww / 2 - w / 2, 200);
- a9 U, D/ z/ v1 g+ r" Q e5 Q* F$ Q. V% T - } z% H$ D8 y* k \4 B) g
9 k- }- z$ v* [' _- const mat = new Matrices();
9 i/ Y3 ?, H" ]$ u b - mat.translate(0, 0.5, 0);
+ B1 \3 x w2 i& X
* F. W- R7 o% f- function create(ctx, state, entity) {6 V% K1 O3 M) y! d7 N% R8 d" v; S4 D
- let info = {
6 Q2 v0 O+ s- w E7 N( U - ctx: ctx,
% p# ?- K4 R3 `+ U- Y" F# a4 G - isTrain: false,5 g8 Y( V& j* r6 u4 d0 A
- matrices: [mat],# i/ f) v/ y2 F5 }! f, ]& w
- texture: [400, 400],
/ q7 X( T) j4 r% ] - model: {
! m; N' Z) o+ m, O" c - renderType: "light",' ?2 _8 M0 ^; B3 U( i" F5 ?
- size: [1, 1],
+ F5 I$ F, c" }8 P& m+ i5 [ - uvSize: [1, 1] _" q& X* [( j, x, ?1 j* A
- }
. x) p: h7 A! A |( n5 q; {+ ~! t- p - }
+ B- y. G6 ]7 I* X& q5 c8 w - let f = new Face(info);
7 L% ?0 c0 Z$ T6 H, o - state.f = f;
6 F: D) E8 `- O
. r/ a: D F( A" e' V- let t = f.texture;* }! k5 o6 ?/ T8 q
- let g = t.graphics;
4 f* I! @" \ R! h - state.running = true;" K& _! }# @2 o7 O$ W5 x7 a
- let fps = 24;
5 }* m% j5 c4 x% D - da(g);//绘制底图
4 j" ]$ h# K+ o1 G$ b - t.upload();
+ j, e$ C& R) K - let k = 0;3 l7 r& I& I- ~; ?5 ~
- let ti = Date.now();! P4 u- H* \3 r$ p! t
- let rt = 0;! R4 \; W4 n0 t; c7 s& C
- smooth = (k, v) => {// 平滑变化
1 o3 r* t4 F! f( v3 j - if (v > k) return k;
* G. d* Y0 V( U5 ~/ T) N - if (k < 0) return 0;. ^8 O, ~' T$ C4 V3 y1 g- x! Q
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! b* a, i) ^# [" n - }& m8 w- c9 E. O! T7 M+ Y: ]
- run = () => {// 新线程
; g2 C( R$ P; g$ e; K - let id = Thread.currentThread().getId();+ h6 f$ ~$ n( l5 O0 B( O
- print("Thread start:" + id);
w* k7 M I8 J* ?; G - while (state.running) {
3 E+ i; w8 z3 z: K( k; A3 D - try {
' [( {; F/ U0 ]# Z; e* B% B - k += (Date.now() - ti) / 1000 * 0.2;0 I7 X3 d) q2 C5 Q
- ti = Date.now();$ i7 o. u8 u+ @& d! |' z
- if (k > 1.5) {6 r! m4 ^9 |* I8 V( J2 M
- k = 0;
" [2 K8 R& u0 f/ P& w" A+ D" ^1 I - }! J. X; }8 s& M# F& U
- setComp(g, 1);2 g( T7 z7 L/ v/ A! \+ z" v
- da(g);
9 s5 `2 q: T8 |0 q# u - let kk = smooth(1, k);//平滑切换透明度
# M% p# P) b- b8 i - setComp(g, kk);2 O8 G' v" ?; Y7 Z
- db(g);( k. p2 P) y( t0 J; O) u! E( ?- O
- t.upload();, C2 `. M* Z( `0 Q9 U
- ctx.setDebugInfo("rt" ,Date.now() - ti);2 L- ~) ] t( ^: Z# {8 t
- ctx.setDebugInfo("k", k);
8 n) `3 ]. n. m" }1 K0 z - ctx.setDebugInfo("sm", kk);
4 h; m; `& t! i7 J$ ?$ ?, L - rt = Date.now() - ti; q0 Z- k2 f {
- Thread.sleep(ck(rt - 1000 / fps));
! @7 u( C" c9 K+ T5 F - ctx.setDebugInfo("error", 0)0 f) a+ q) D, n; q% B. i
- } catch (e) {" f& @; @; f2 A( w# V
- ctx.setDebugInfo("error", e);' @# @& B1 C+ B* _
- }
; [6 u5 e* U% w; L - }
" v; U, ^, V5 a - print("Thread end:" + id);! N' ?+ _/ e& k8 w* \
- }9 v3 G& N: x; x' i U
- let th = new Thread(run, "qiehuan");
0 A% g h) Y1 X2 y - th.start();' M; I; |6 M" U
- }, Y. d) {' `# T5 W2 r Z6 @
- - p0 C% L0 o0 G0 V' H
- function render(ctx, state, entity) {6 S/ O8 o6 ?0 \1 X, W% r9 u: O
- state.f.tick();. D9 K t( V9 \& Y7 h8 I" H4 z% I
- }
+ j1 p, [6 _; C8 r( Q - 4 c; v1 R' d5 }9 E* o; C, g( m
- function dispose(ctx, state, entity) {
- }' f; b% O& e9 i9 h9 m - print("Dispose");
1 C: s1 b2 l- s; B - state.running = false;3 i6 L8 Y1 ^* T$ P) P+ W
- state.f.close();
) [, ~9 K6 C3 P9 n0 ^; |3 N" F' h - }
2 B* N4 \* s* h$ c. ?8 I: c6 A0 F
" W6 u% [" y7 a- function setComp(g, value) {
0 p- Q6 [/ T5 a% K1 B+ B' ^ - g.setComposite(AlphaComposite.SrcOver.derive(value));
/ P8 r# ` k$ P: N- N - }
复制代码
2 V1 d r+ l/ `" e t% \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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6 h, V5 W0 O7 v7 y% H7 `
* B6 p& o9 V: r顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)7 A* Y! W, Z) D2 w/ i& p
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