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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。9 N9 e0 ~, p3 K! s
- importPackage (java.lang);
( X. p$ E9 E& n6 G/ V1 j- L/ d9 A - importPackage (java.awt);# E) `2 D {; [# f) J* m9 x: ]6 p( B
" B1 R/ K5 s% ~: W; c4 t+ }- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);% N3 ^; C: S; F v7 j$ }
- 0 E" p& K0 M4 K" P3 t5 v% Q! v
- function getW(str, font) {1 [* l4 r/ z* v% s
- let frc = Resources.getFontRenderContext();6 Y' M( j& x; e' z) H" n
- bounds = font.getStringBounds(str, frc);" k( s. Q% u# O8 A) U: r
- return Math.ceil(bounds.getWidth());
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7 {. N: g3 D1 S$ V7 ~3 M: p/ N5 o( _- da = (g) => {//底图绘制9 r% m& T( b: B$ m1 c' m1 d' z. a. H
- g.setColor(Color.BLACK);+ m1 o0 _+ K7 ?" |1 M
- g.fillRect(0, 0, 400, 400);; F" U. k. X$ ~: }- ^2 o3 d
- }- b) o9 R3 k7 y+ M$ Z
- ) S& \0 u9 R* {! ?# r( K
- db = (g) => {//上层绘制$ F- R& X3 O+ O; G' d3 ?' L3 L
- g.setColor(Color.WHITE);
5 }5 G* `& j$ q* D8 Z% K' t9 e - g.fillRect(0, 0, 400, 400);
: U$ D _, @, ?8 E- [" b6 b - g.setColor(Color.RED);
$ s6 y/ ^9 V) Q; G' j+ h5 M/ m4 U - g.setFont(font0);
8 Z. ^$ D* t6 U& r. @) Q - let str = "晴纱是男娘";; t; B) B& Z0 V9 N/ H3 S
- let ww = 400;
6 x9 V; X$ a) F) \ - let w = getW(str, font0);; Z `0 Q1 N1 {% Z, f( R
- g.drawString(str, ww / 2 - w / 2, 200);4 I! s+ O0 a f9 r% [$ u% p8 m- B/ n i
- }. ~, L! W% R; V) w) w8 a9 K
- : U/ j! \% y4 X. L
- const mat = new Matrices();! l8 g8 @ Y( U& r/ r4 O
- mat.translate(0, 0.5, 0);& `' V4 j+ ]9 f& g
. T6 _& |, v0 N8 P& P7 Y: z- function create(ctx, state, entity) {2 c7 C& M0 ^/ h7 Q
- let info = {
* P2 @# n+ Z1 G - ctx: ctx,
& `% I+ j0 L' z- v0 e - isTrain: false,% O: h# _( k* a9 v
- matrices: [mat],
9 E. T4 i$ k" a0 i - texture: [400, 400],
: l/ J ~ O @0 p0 d; _" b - model: {0 U* z/ A0 |& R: T
- renderType: "light",/ Q6 ^( q2 a: c3 G( z+ `
- size: [1, 1],8 `5 E9 U) g( b
- uvSize: [1, 1]$ Q" n( L/ m w5 C& L" ]2 k' M
- }
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- let f = new Face(info);- `* _( ?+ C* ]9 w8 }
- state.f = f;( g9 f# [' h5 F$ h2 ^: D' R
- # H+ V% S/ ?( x0 i) h% v# _
- let t = f.texture;/ b0 |7 p6 _2 h ^# Y
- let g = t.graphics;
% K2 B9 c$ n& J* ~, v& z: j - state.running = true;; @) P9 y0 l& Q* |; x8 ~! O& j, \
- let fps = 24;
; K0 l' u$ R) F6 I) Y9 [ - da(g);//绘制底图6 E) i) r" T; M
- t.upload();) x- K4 E3 ^0 l3 j7 B6 c
- let k = 0;& Y, [" b& X# T6 B' D) A
- let ti = Date.now();
7 _. ^: b) ^2 R j' k9 @0 _ - let rt = 0;$ b8 l- P% y8 i5 ?/ V* t H# J
- smooth = (k, v) => {// 平滑变化
2 J# g8 F" [4 d9 `/ z S; q3 D! Z - if (v > k) return k;
7 I4 s9 b. C; O' X& z# _5 ^# F/ y$ @; ~ - if (k < 0) return 0;
, e( ]) Y% d9 K- P8 L - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
- B2 y9 `, ?8 ~ - }. S) d6 i D# U% u/ r" I }
- run = () => {// 新线程# u( s' Y: L, k2 {/ W
- let id = Thread.currentThread().getId();
) e- q8 u' C! x" D% E9 M0 K - print("Thread start:" + id);3 {9 a. b6 E3 y+ @$ R* n t! x
- while (state.running) {* O9 u# P! J" D, P: ]3 ]
- try {& T" ?6 @: R6 W( K4 y
- k += (Date.now() - ti) / 1000 * 0.2;! F4 B' D: h8 Y) K1 {7 A( \
- ti = Date.now();
' X0 |( H4 i" }9 p6 H( F7 ] - if (k > 1.5) {) h0 B3 M; B# r# s) x) j% ^9 ]
- k = 0;
8 ~4 j) i7 ?# b - }
& q7 V: k8 N3 C! m9 x* Z! N - setComp(g, 1);
8 a2 Q9 e, I# {" C) \0 _ - da(g);
) ~2 J) j/ `+ r4 K [3 x/ ^ | - let kk = smooth(1, k);//平滑切换透明度
6 E# z, C" N$ u0 L; D - setComp(g, kk);
& U! n9 W8 h/ D6 X. N; }, p - db(g);. n& @: T0 ?& g) D' D) Z: u
- t.upload();
9 H3 X3 Y7 F% W' j- `1 T0 p - ctx.setDebugInfo("rt" ,Date.now() - ti);3 Y, F C/ M- g4 C. k3 a
- ctx.setDebugInfo("k", k);" ?5 u- w* G, R2 k; }( Y* G
- ctx.setDebugInfo("sm", kk);: [: P9 \: F! T0 J
- rt = Date.now() - ti;
* y3 n3 Y1 [ b$ U; N- l: _; n - Thread.sleep(ck(rt - 1000 / fps));# Q6 H( x% T$ m0 b( g1 C8 _0 _
- ctx.setDebugInfo("error", 0)' r. m6 a2 E8 @
- } catch (e) {+ j9 Z% @7 ~5 U" j7 b5 B
- ctx.setDebugInfo("error", e);! X2 E6 S0 b e8 M
- }9 g% r6 z- c- h; f4 s3 P
- }
: @, j5 z5 X4 Q1 H1 p! K/ E( { - print("Thread end:" + id);$ x. V: i5 _8 y' N8 U
- }
# h8 ~4 Z. ^* N7 D0 O7 d, _% Y - let th = new Thread(run, "qiehuan");! |8 z4 N' i1 q8 d# _& E2 z
- th.start();4 e) o2 C4 s9 N2 f4 l1 ^
- }
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9 F. n6 r: K$ z1 H- X, L$ I& o- function render(ctx, state, entity) {
9 b& k f- ~2 Y4 G$ x - state.f.tick();, s Q8 g- b/ g) q$ A4 B: i6 x2 i
- }* y$ [+ e" O% W0 ^
, f8 x" Z. ?1 D7 o/ P. c- function dispose(ctx, state, entity) {; ] Z: U0 n4 h M
- print("Dispose");+ A9 T+ G: |5 t. H, o/ C4 @- d' \
- state.running = false;% U' l3 S( M5 ^
- state.f.close();4 |& b& Q7 t2 d2 _/ M6 }3 @/ _9 n
- }$ r/ N' }) ?4 ?1 ?( ~
( M% ]% G$ U" b! q7 W4 |- function setComp(g, value) {! l- }. c9 v x; m8 A
- g.setComposite(AlphaComposite.SrcOver.derive(value));
5 _; j: O% P9 V- a) a) B - }
复制代码
' n- `) j7 G( T9 R3 S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。! ^5 s1 z* H' R5 C& x( R( e
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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)
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