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2 O$ ]8 W" [* c4 S: y6 l1 i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。0 x$ J3 l3 d6 t+ j& c3 r
- importPackage (java.lang);
7 x; b! ^, ?; d9 C8 M - importPackage (java.awt);/ e# I9 ]; N& }, t
3 n) G9 a5 e3 Z% \8 D$ c5 G4 U- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
$ J5 l3 Y- L7 n - let frc = Resources.getFontRenderContext();' ^/ T, b! {- o% W b3 @, U/ r7 w
- bounds = font.getStringBounds(str, frc);
* u2 D$ v* D3 `: m* \0 T - return Math.ceil(bounds.getWidth());% Q5 I" k/ b1 ] G
- }
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' H( y; j& o0 z' C" J# `- da = (g) => {//底图绘制" k" Z# F* a! Y8 A/ h# _# X* v
- g.setColor(Color.BLACK);6 A2 l6 o5 [. P! s6 ~" ?
- g.fillRect(0, 0, 400, 400);' {' k2 f) T( Z" @( F
- }
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( E! Z/ B) _$ w/ Z5 e- db = (g) => {//上层绘制$ W2 {+ p! k3 U7 `' [# p9 f3 k
- g.setColor(Color.WHITE);
" K8 j1 `0 G: G8 Z - g.fillRect(0, 0, 400, 400);
0 c; O9 M: I: H% Q/ m3 ]" R1 M - g.setColor(Color.RED);+ Y7 F4 u3 S, g b4 L
- g.setFont(font0); z+ n2 W2 |0 P
- let str = "晴纱是男娘";
) q( K2 K! R( ^9 ~* x/ [1 J* G - let ww = 400;
% ` k4 j$ y1 ~0 b5 ` - let w = getW(str, font0);
) m1 \8 v7 J) C9 \* ] - g.drawString(str, ww / 2 - w / 2, 200);% _' t' h6 P4 a# U1 f; I* s
- }4 ^( O. D7 }* S6 g! v1 C/ E
- 2 `) C; g5 \: n
- const mat = new Matrices();
2 F& r9 z. h5 @ - mat.translate(0, 0.5, 0);7 f3 `( Y, H) a0 K: d$ f
, z% f/ @5 b9 U K- function create(ctx, state, entity) {
* I8 \4 M9 X: I" b0 q( H- ? - let info = {) C, J0 j- b( G. ^4 E
- ctx: ctx,* k" b/ l8 L- C$ P/ I4 a; i
- isTrain: false,7 f; I% {! O# N- t
- matrices: [mat],& G1 l" _7 L B* l& ^
- texture: [400, 400],
% r: ]( K6 g% @- `( L* x( Z - model: {
$ W! U; ? R. A5 @' u- l! Y1 ~! |2 \ - renderType: "light",
8 \0 O& `# y) L. C - size: [1, 1],/ M2 h7 O+ M9 Y3 d7 `7 u8 m
- uvSize: [1, 1]( g1 V# v; f* t( b7 D2 U
- }
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- let f = new Face(info);/ S" Y& R* L' k
- state.f = f;* x+ T( {2 n. P1 U/ l8 Z
- 2 S/ q) p1 H/ o/ |: G c u
- let t = f.texture;4 p3 m3 O# R! r
- let g = t.graphics; c; @3 d$ w& _4 X/ E7 m
- state.running = true;
1 O9 P$ O0 w1 W( @' ^# B: n - let fps = 24;
! S1 q1 s0 P- @, ]' y - da(g);//绘制底图2 C7 {0 X' |8 \* m( ]. L" G7 S; [1 I
- t.upload();
8 \6 N( ^+ X7 V - let k = 0;
. R2 B, F3 E/ k# H7 f6 s- E - let ti = Date.now();8 e5 h& T* A% K* |; L7 c
- let rt = 0;
& B/ ]4 ?0 @6 J - smooth = (k, v) => {// 平滑变化
* v5 m. W% o. S- E; W - if (v > k) return k;
9 a3 `7 J" e) Z% U }% f$ `, X2 p - if (k < 0) return 0;
# `; B& u. {0 G7 }; H - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;* ^- P" `- |2 H, t. A3 E5 Y I9 A
- }
# M2 T; M3 r/ x6 ~0 }0 c - run = () => {// 新线程
8 x( |5 T1 G# M/ P5 w5 D/ w - let id = Thread.currentThread().getId();+ P( O) `, J: O& C: b+ t/ {
- print("Thread start:" + id);
' ^& S R2 G: z* o# k - while (state.running) {
+ {1 ]" L) B7 b# @+ s' z - try {
1 ^8 f4 o$ s4 ~: r. R' U1 j - k += (Date.now() - ti) / 1000 * 0.2;
0 l7 {2 p! k+ N2 E; W8 b - ti = Date.now();
9 I$ O: y- a- o5 w: ] - if (k > 1.5) {
1 l! e* @0 e' }8 r* H! W - k = 0;
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- setComp(g, 1);
. o; W+ V0 ^0 d0 u6 U - da(g);8 `8 [2 }6 p U y+ P
- let kk = smooth(1, k);//平滑切换透明度
7 w: [6 _$ t! V2 ]2 f - setComp(g, kk);& R% p! ] ^. g7 w
- db(g);
" }( r. C6 s" Q( ~ - t.upload();
: }0 r6 V3 p6 }+ m - ctx.setDebugInfo("rt" ,Date.now() - ti);
( x5 ]* A2 N' ] - ctx.setDebugInfo("k", k);
. m* u5 O0 M, A4 k( O- X) A - ctx.setDebugInfo("sm", kk);
: Y. B5 z3 \3 I2 F( q5 k) f - rt = Date.now() - ti;/ d7 V- e+ b( B1 _8 C r/ H7 _
- Thread.sleep(ck(rt - 1000 / fps));8 B5 g. E0 J0 K4 B' _1 P5 ?) f
- ctx.setDebugInfo("error", 0)
$ P5 R. {+ s" l1 C+ g - } catch (e) {$ B8 i$ \, v! B+ D# E& j. a5 A
- ctx.setDebugInfo("error", e);* d! W1 O( s z: x' _4 O
- }
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- print("Thread end:" + id);2 b! \2 ^. W5 S. P1 j' P
- }
1 N% t* p0 ?) N" E3 x2 \. ]9 g - let th = new Thread(run, "qiehuan");
; T. h: d, `% J - th.start();, D i+ D2 g0 _3 J& a; P
- }/ V- \9 X; X( b
x! o0 ^$ E7 b7 W; K7 W6 U- function render(ctx, state, entity) { h; Z; F0 ~4 T
- state.f.tick();
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7 { P* {5 c. j- function dispose(ctx, state, entity) {
' Y! X4 V5 [1 P3 i7 y" j; F - print("Dispose"); d4 @5 k4 Y% I$ _
- state.running = false;
% ?3 v4 R& R* [8 ~ - state.f.close();
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& J" `3 x" [5 g* \% F9 |5 X: p5 W$ @- function setComp(g, value) {8 i k7 k( m( p
- g.setComposite(AlphaComposite.SrcOver.derive(value));9 x% _$ D6 j; `+ _) e* V
- }
复制代码 1 V+ j" K$ p, o/ h# M) ? r) f
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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" N8 G; i1 Q+ q+ 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)% l: u: e l1 t; U: V% U2 U- [
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