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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。% P" x" V. \% V9 }
- importPackage (java.lang);
" N- v$ @+ U! L - importPackage (java.awt);
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! Q# n2 y/ I6 y z0 g- include(Resources.id("mtrsteamloco:library/code/face.js"));
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! E8 E+ a9 p& c1 [, v: F& c: E- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
% R4 x: M& c7 L! r. U8 v - ! A& F# m9 X( l! o$ v% O
- function getW(str, font) {! T$ Q7 q! u9 }8 U8 b
- let frc = Resources.getFontRenderContext();& @. _* i; L y
- bounds = font.getStringBounds(str, frc);
, @8 f7 E% r5 T- \ - return Math.ceil(bounds.getWidth());0 t! P0 i5 i) u- O: Q4 s
- }- u+ H" | z1 C1 o/ Y
- % Y4 Y2 j* m+ X. M% C3 [
- da = (g) => {//底图绘制
, G, p( O" e% F% Q O - g.setColor(Color.BLACK);
7 v8 f6 B; U" |* C8 ~) d: r' h5 R - g.fillRect(0, 0, 400, 400);9 G2 Z; q* l1 _+ y, I0 X( d
- }
9 V4 n1 c3 K) h! g
4 l- _" ^& y) Y8 Z0 j$ R- db = (g) => {//上层绘制" H9 T4 O4 S) s% H, ?6 z) N
- g.setColor(Color.WHITE);+ Q/ f( H5 s2 K! y6 m
- g.fillRect(0, 0, 400, 400);" H% I, H+ {0 K2 F4 I! l
- g.setColor(Color.RED);; r( P( h6 q4 ?8 x
- g.setFont(font0);
) t* Z, G) L! X& K# Z7 u) z9 h: G - let str = "晴纱是男娘";8 |3 e2 |( C9 _. y6 g
- let ww = 400;
7 ~ K- C! w: R - let w = getW(str, font0);% q$ S% ~4 R% Y0 N6 y* R; Q) g+ |
- g.drawString(str, ww / 2 - w / 2, 200);
$ K9 x& M& O; ~9 A# f - }
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- const mat = new Matrices();
$ @. _+ r1 I+ s - mat.translate(0, 0.5, 0);0 l7 o0 e' ^1 z8 V
- # d* V5 I# V% @# J2 ^( g
- function create(ctx, state, entity) {5 F5 ?+ W8 a o) a
- let info = {) \$ D; b! J5 M- }7 @
- ctx: ctx,/ w& d+ M% S2 L0 g8 B
- isTrain: false,6 z3 S6 J$ p! u9 U0 ?
- matrices: [mat],. U& E& M9 A, @& S7 D
- texture: [400, 400],
+ O7 i; r- W1 R, N. l - model: {
: n4 S; {3 J$ j$ v - renderType: "light",
# w* c2 \# K# d/ V - size: [1, 1],
/ @7 `* \" j0 ? \ - uvSize: [1, 1]
4 T. U6 W9 N, T+ I q4 `$ M - } B9 @( \7 ~5 C; e# y0 V) ^
- }
. ?; p* G. s r4 ~& c/ M8 \/ v - let f = new Face(info);
/ N- K. ^% x+ i) W8 t5 s6 B - state.f = f;0 }' Y1 r3 k9 g* M! e9 u$ G/ f
" E4 S* z, N- @- let t = f.texture;
: @* |4 F9 [: Y - let g = t.graphics;
/ T6 D4 i+ r1 {# _8 x - state.running = true;( U2 w0 e' |; j
- let fps = 24;
* ~* g9 l- S5 c( k - da(g);//绘制底图* y, r# B' M( ^
- t.upload();/ p* h- W' \( l c- Q. }& y
- let k = 0;% @+ G0 d7 e9 U) x7 O
- let ti = Date.now();3 w9 b. d! G2 U! K2 Y7 q8 C* c, q
- let rt = 0;4 H+ C8 ]7 O* ~( a
- smooth = (k, v) => {// 平滑变化
: I/ g4 L! {. R0 L" V - if (v > k) return k;
* \5 w' p1 C: P - if (k < 0) return 0;9 K) C7 b. l$ `, l2 K. ?
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
. g9 x2 J! ~) r8 g: O - let id = Thread.currentThread().getId();7 p; E4 l% O& Q' ~0 F3 D K7 v& o
- print("Thread start:" + id);3 b7 M6 Q& l/ K# n1 k
- while (state.running) {
& d1 l! [2 g) c8 g, ? - try {4 \6 Y( W9 A9 H9 n/ P( t/ ^
- k += (Date.now() - ti) / 1000 * 0.2;
5 r& t" M7 k8 P) x6 t7 R - ti = Date.now();
0 m: ]6 Z- g7 R0 n* B/ O& a - if (k > 1.5) {
4 P; m# f2 W- z4 b! p - k = 0;
% R3 u& b; A5 Y# P8 Q - }% ]* C7 h3 ^8 M4 H3 B" Y% n6 f9 |2 a
- setComp(g, 1);
2 }9 I _' W- L; R! ?; L2 j - da(g);$ a! _; O+ g) v7 R
- let kk = smooth(1, k);//平滑切换透明度# ]' s% ]0 f0 `# ?% w
- setComp(g, kk);
! f! N/ [# Z1 O- X3 Z - db(g);( Z. _4 m6 G. ?# d( z
- t.upload();
3 b9 w4 Q+ ?& J. z - ctx.setDebugInfo("rt" ,Date.now() - ti);" |! B$ F2 H. w
- ctx.setDebugInfo("k", k);6 S' D- s' |" R0 a8 O# i
- ctx.setDebugInfo("sm", kk);9 a# y* i- y! g+ k7 I: g# ^' O2 P
- rt = Date.now() - ti;
" F# {" ?8 C( G B - Thread.sleep(ck(rt - 1000 / fps));0 ?( T2 Z t7 _- t. I( u
- ctx.setDebugInfo("error", 0)( X. j# J5 {& W
- } catch (e) {
1 H& K5 g/ q3 \* A - ctx.setDebugInfo("error", e);( w* q. c, v2 u8 [1 h8 A! r% _ w
- }
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- print("Thread end:" + id);
: C `( ^! ^5 H0 n+ d% [ - }" S+ P4 O: `; \" Z, i9 M
- let th = new Thread(run, "qiehuan");
7 u1 n1 ]" Y" S* m - th.start();
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- ) u3 D& A" S7 ~2 ]: I
- function render(ctx, state, entity) {
" Q' C Q! P( N t* X* F ?$ \6 f - state.f.tick();% z( w5 }/ ?; R n1 F
- }. h% @; q( N5 E. W( u6 m
* J+ p: ?9 ]% K$ D2 [- function dispose(ctx, state, entity) {
/ ]# U* ^1 u2 Q2 L7 V; }- e$ M' O; x - print("Dispose");9 \3 l0 [/ S, m% c' S/ `
- state.running = false;) j4 d) C( v2 D
- state.f.close();
4 m' C1 x. V- H, H7 Y - }
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0 l5 ]' q& T6 G' R# G% I' r- function setComp(g, value) {
! y2 f) H g7 e3 [ - g.setComposite(AlphaComposite.SrcOver.derive(value));3 Z% v1 n0 m# f0 r/ g5 E* I% V
- }
复制代码 6 g9 d: x' O# Z. _
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。" y9 U H+ y# J5 ?' H# D
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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)2 r4 J% t. T7 {% j1 D6 p
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