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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。/ S. R* M5 o* N, V% z/ \$ {- Q
- importPackage (java.lang);
4 A$ j7 A5 n8 k4 v1 J - importPackage (java.awt);
7 U) i0 r0 ]: B" _7 |- U% Y3 A
! |! m+ b- k; G4 {2 ?+ [2 h& ?: m7 `- include(Resources.id("mtrsteamloco:library/code/face.js"));
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+ H) `1 k% O: L$ e# [- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);' q% z5 g: S) s' p' U
( b: E2 K4 ], A: m. f; X( G- function getW(str, font) {7 d& v, R- z0 \; {
- let frc = Resources.getFontRenderContext();' q+ G3 H- o3 A6 y& t8 l
- bounds = font.getStringBounds(str, frc);3 N0 c+ G% M: K0 B+ Q
- return Math.ceil(bounds.getWidth());
+ q) b# J9 g, U1 I1 d# T - }
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6 J4 C E- y- n) B( e8 b: p1 v- da = (g) => {//底图绘制' A8 Y. K$ s8 f: a
- g.setColor(Color.BLACK);% K( k- |$ l1 L7 C+ r) p% e3 A6 \0 m
- g.fillRect(0, 0, 400, 400);
" E M) e F v. s - }
- u9 Y& E5 N; O X; S; g
1 |! _6 Q* M- ?/ w" q$ Z" U- db = (g) => {//上层绘制
% Z2 s. U8 U$ v - g.setColor(Color.WHITE);: O7 Z; s1 f1 K8 R
- g.fillRect(0, 0, 400, 400);1 v) K& a: O9 l9 ?0 ~& n- A
- g.setColor(Color.RED);& z( E$ U' I8 Y, H
- g.setFont(font0);
& c: I) M+ O2 n0 u2 z - let str = "晴纱是男娘";0 n6 G; X0 {/ o2 }1 X
- let ww = 400;
# A3 J" t$ S9 u) d+ ?& e - let w = getW(str, font0);
, _6 ~0 i) t; t* A, o - g.drawString(str, ww / 2 - w / 2, 200);
: g0 ?+ t/ |& j# ^" i0 f9 W - }
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- A' F* _. i7 I! S* }5 n* d# f$ o* |- const mat = new Matrices();
; H1 {$ C; g4 N - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {. ]8 R& Z5 ^8 G8 L2 F8 }
- let info = {
, q2 W t. e4 G# z - ctx: ctx,
3 I! X3 ]: Y/ m( ` - isTrain: false,
' e% `6 e* N$ e, t6 ? - matrices: [mat],
$ i; S+ h, x3 n% _2 _ - texture: [400, 400],
5 y, J5 C; ^7 L2 ^$ F( i' g - model: {
% _6 R. V( h( f: c4 K/ I9 D - renderType: "light",
- X& T b$ Y1 \" ]! K( W - size: [1, 1],
" q( c# v, E [! S @ - uvSize: [1, 1]
& C, Q7 K; F6 Y5 O8 Y" X - }
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- let f = new Face(info);2 f$ [2 ^. n6 m/ Z# \- @
- state.f = f;6 V" R& u1 V$ Q* O2 H& M& b
' K7 @4 q+ H. a5 `! i. L/ B, s- ~2 k- let t = f.texture;
- b( G" O( K1 c - let g = t.graphics;
, ~0 ^& g5 p' y7 I0 G - state.running = true;( L' H1 O! E. h! E! n( y
- let fps = 24;
$ g- c6 k; Z9 E9 e! G - da(g);//绘制底图& w+ Q8 @7 F( U# h' Q
- t.upload();' w' }% j/ ~: a7 ~( G) y
- let k = 0;& _, o- F7 \$ a) S+ u, a
- let ti = Date.now();
/ o& O3 x9 Q. V9 V$ f/ i - let rt = 0;5 S' n% `6 i' O# x' y
- smooth = (k, v) => {// 平滑变化( P, [3 k# Z' i8 A
- if (v > k) return k;- `" L' ^+ i8 M
- if (k < 0) return 0;* `+ y5 O- B5 L$ p) h- B
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;% Z: `. E+ Y! S. Q; b8 q- p
- }5 K! u" x% V4 b a* _, S
- run = () => {// 新线程) C( ]5 b( d$ k
- let id = Thread.currentThread().getId();
" k, g$ v- x* c1 `( l" |, |" x5 X0 O - print("Thread start:" + id);1 o& \7 m7 Y% P- t. s3 I: c( E1 t
- while (state.running) {
, v" h3 J } j8 w - try {
- I0 l7 }: q2 L0 b$ @ - k += (Date.now() - ti) / 1000 * 0.2;
$ ?; S! i* Y& p& j5 H - ti = Date.now();2 n" d) @5 e0 N( h4 A0 R: s% ]
- if (k > 1.5) {) K8 F% ?. Z) p' ?( i
- k = 0;
& f, k( h2 [0 L6 L+ U9 ] - }/ R6 Y( \$ P- M# U1 l
- setComp(g, 1);; _. p/ S2 f. o; D
- da(g);
, S# s( s9 [& v& K6 i - let kk = smooth(1, k);//平滑切换透明度
: y& i4 {% w1 T, L - setComp(g, kk);
' ?" {7 M8 G# a8 q, v - db(g);
3 D7 n3 L+ a) \- N! q) } - t.upload();
& M6 W' y4 m3 A - ctx.setDebugInfo("rt" ,Date.now() - ti);1 U/ J1 O* ^- C4 L; ?3 E: z: p. ]
- ctx.setDebugInfo("k", k);4 p1 U7 H& J8 [5 T* G$ m' ~
- ctx.setDebugInfo("sm", kk);
: |0 X( J0 v" `6 i* w; ^ - rt = Date.now() - ti;
+ M3 a# G: Q; R: a, ]; R4 K - Thread.sleep(ck(rt - 1000 / fps));3 v2 H* M/ |( J
- ctx.setDebugInfo("error", 0)
7 O8 B/ ]! B- b# ^3 N: f - } catch (e) {
% d- o( P! J* o* f, n+ v5 }' L+ m - ctx.setDebugInfo("error", e);
! T; j$ R7 t4 H( Z, m; N" t - }) C( S% b/ {7 a. m
- }
1 v0 Z! @% O6 T- ?9 ^ - print("Thread end:" + id);
" R0 O' i: o+ G - }' q$ q0 x8 E7 O9 t
- let th = new Thread(run, "qiehuan");- z; p( I( A; ?/ m
- th.start();
9 p! w7 |1 P: i N) h- h - }
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- function render(ctx, state, entity) {; e! f) [- `6 R
- state.f.tick();/ Y, W% k2 p/ E: p7 u; n3 g5 d
- }4 }! i2 s4 K) k
- + D, L( w- G' i: H, O/ G4 m$ C
- function dispose(ctx, state, entity) {
: A- w9 q5 m: _; q$ K6 C: w - print("Dispose");
" L9 a! }: T$ i1 A3 P - state.running = false;8 Y' Q: @/ N' H* d; B
- state.f.close();8 Q9 X6 V4 \% l S( M3 e2 h6 S8 ?3 K) L# c
- }0 v- l) l+ C x* T
# q9 R/ W6 G, @- ?+ B1 b( I- function setComp(g, value) {
) u, K3 h) |/ s! M) w" B. I# i - g.setComposite(AlphaComposite.SrcOver.derive(value));
- U7 K" v, `" `2 u2 a( t - }
复制代码 7 o: v. c) I0 c4 n/ ~
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。3 n4 J. m3 F) }7 X4 m x8 }
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. l& a5 E7 @* b" r5 I5 ?6 k; m" s顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)9 E% v, y' I8 ?: v, M
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