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0 M( _# c3 ~1 g9 r! Z3 G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& m: g0 u7 i8 Q
- importPackage (java.lang);
% y B: d, j9 B; i* m9 C - importPackage (java.awt);
, l/ }/ ]! c; b$ w/ o) ]; B
% h! ~8 t% o- \- include(Resources.id("mtrsteamloco:library/code/face.js"));* ^7 d* r6 l3 e4 W- s* i2 s
- 1 D. ? X9 F( J+ c5 d) y
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
! s4 L' h" V7 |/ i' G* n* S - 1 o5 Q+ }+ U3 B& b
- function getW(str, font) {
, m) [5 h7 E2 ]5 c8 j% ~& i - let frc = Resources.getFontRenderContext();
! i/ \7 Y7 y( X7 [& T- Q& G - bounds = font.getStringBounds(str, frc);$ g( S/ ~ v: s) e( w" G2 I2 ~
- return Math.ceil(bounds.getWidth());
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- $ P5 D1 t0 W M+ w3 r; x4 I! ]& v
- da = (g) => {//底图绘制
" P5 S8 Z4 a6 T8 ~8 P5 {7 s - g.setColor(Color.BLACK);! y. l) Y" O( L3 r4 o
- g.fillRect(0, 0, 400, 400); ]) M) ]6 [- P2 I. ?2 [
- }% m/ h O, e6 }, r/ O
- & o2 c/ S/ I- j" c( T5 q
- db = (g) => {//上层绘制
) V. Z' Q) S3 n# q4 M! | - g.setColor(Color.WHITE);0 A1 Q6 d7 z! U3 J+ |7 S
- g.fillRect(0, 0, 400, 400);
, T/ R9 [. z8 Y w6 f$ j. ~% z - g.setColor(Color.RED);
0 x& f7 H8 z7 J9 Y - g.setFont(font0);; G5 \; T' C1 T, }. }7 d
- let str = "晴纱是男娘";
: d. H% A" x1 ?* \0 z - let ww = 400;; y4 _. Z! B( K4 e& P2 }7 Y
- let w = getW(str, font0);7 Z& \1 M4 ~+ p6 ?3 F3 }
- g.drawString(str, ww / 2 - w / 2, 200);
0 T5 Z ?4 I" }3 s( U& K/ s+ U - }
$ f9 G% O- e( u+ b h1 v - 1 d" J; o D! t- {
- const mat = new Matrices();
7 F; I6 d+ v# x' ?) i; {8 ` n - mat.translate(0, 0.5, 0);2 M7 J' D4 m+ D1 _; r3 k; ~0 x6 S
& Y6 Q. m% T* b0 R8 j- function create(ctx, state, entity) {8 G+ G* G2 e; }$ b T
- let info = {
* p0 b% H, D _ @9 B - ctx: ctx,
; }( R; O+ u4 b v - isTrain: false, ?7 o/ D$ x% B, Q
- matrices: [mat],- j& r9 K& L" R, r
- texture: [400, 400],3 p/ D$ [2 t- D3 X2 l
- model: {' V6 Z4 ~- q. k; }
- renderType: "light",
1 J8 M& g, }9 g H - size: [1, 1],& s1 V' _4 n! z# {
- uvSize: [1, 1]
& @! Q3 D6 D. b- k - }7 `, ?4 z1 Q; V1 ^
- }: g: S' C7 d: Q/ A$ g
- let f = new Face(info);3 [5 t' z7 E( c& u7 {4 v( R7 c
- state.f = f;* h' h" x8 T9 T2 m# C7 g
. j3 W8 [" M: Z5 p- let t = f.texture;
9 C% b: J- V" r0 F; D! ~" T. u - let g = t.graphics;+ Z9 e8 c0 u2 Z2 E9 T) ?
- state.running = true;; d6 l8 i$ o: y4 d9 [9 A
- let fps = 24;8 D1 J. N$ @& |* ~& v
- da(g);//绘制底图
m) S$ E7 c- h) F; f% w - t.upload();. F" [& p3 L8 b6 |0 O7 W
- let k = 0;" C+ f6 @4 u4 P" P; T7 n
- let ti = Date.now();
9 r$ \ L) F0 L7 b0 a; A% g* X - let rt = 0;
4 b1 c6 a b+ u3 a! Y! i9 k - smooth = (k, v) => {// 平滑变化: H: i/ c2 B7 I7 o! [! ]+ y
- if (v > k) return k;7 l: J8 K- E( t
- if (k < 0) return 0;0 M8 i8 ]9 Y7 H" ~3 q7 {! X
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;# g. \5 }) |+ u: v F+ Z8 J* w
- }3 G* ^, v$ S& N- B( }- A
- run = () => {// 新线程
. ^% [# `! k \- D - let id = Thread.currentThread().getId();
@/ W# ]: Q) F5 ?" S& w0 y - print("Thread start:" + id);
! q7 Z9 P6 f" {5 g: I+ O* s - while (state.running) {
3 W+ _# }) F$ N$ |' n - try {8 } Q$ G% p6 c p7 ]& R t7 J
- k += (Date.now() - ti) / 1000 * 0.2;& t. P' s3 e$ O( k* ?& |- M
- ti = Date.now();
& S( V) z O* [1 J: |5 y2 k& O+ x8 F - if (k > 1.5) {
/ }- V6 H! C% A' J. K2 n - k = 0;
6 K7 K2 P0 @- j" S( A - } r' g& F. w$ c8 a8 v
- setComp(g, 1);3 i/ u7 U/ K! i) c+ K; U. R. y
- da(g);
- T3 @' I" ^9 j- Q5 |4 C. O- r3 L - let kk = smooth(1, k);//平滑切换透明度
* h) Y5 I1 `! c1 b. R/ h7 r - setComp(g, kk);
* a- g! O0 \# w0 y% L9 n - db(g);, ^8 ^) @' V9 m! |: r9 M
- t.upload();0 G$ A5 Q0 d/ n& f; X$ n
- ctx.setDebugInfo("rt" ,Date.now() - ti);& q; u0 q; b; c+ h+ n- j" D
- ctx.setDebugInfo("k", k);
\0 o, v4 f i6 b& X7 S2 \ - ctx.setDebugInfo("sm", kk);
1 ]: T0 I; U* D$ h* e, ?4 X - rt = Date.now() - ti;
1 r9 y. i% ~( @: G - Thread.sleep(ck(rt - 1000 / fps));& A7 G* o/ }3 t2 i
- ctx.setDebugInfo("error", 0)
# p& F) D- Y; g5 i+ Y+ [( u( M, F - } catch (e) {' ?2 _( h+ [* Q
- ctx.setDebugInfo("error", e);
3 V1 {+ ]# J. ^9 y" q* H - }+ d3 a# k8 y2 B* v( N `
- }
8 U8 h4 y" j( p3 y8 @ - print("Thread end:" + id);7 B3 W6 A- U. Y+ r1 F+ w) X
- }: m0 n% E& a9 i/ U% Y- X
- let th = new Thread(run, "qiehuan");
3 C0 A' I/ \0 r( W1 A - th.start();/ B' Q0 i# o; Y' Q" t
- }
+ k$ R! c* d; A" D+ K2 R2 \8 J - . S* {2 Y& u* p; T9 Q
- function render(ctx, state, entity) {: S f# c! g2 G8 O3 g0 f& w
- state.f.tick();8 \5 x2 Y( B& K! b6 U
- }4 g" C" U1 n h0 v, h
- ' e: L# X* N1 ?* A8 Z! _: y
- function dispose(ctx, state, entity) {6 R- @5 @4 R8 r7 c; \- `4 X
- print("Dispose");1 h$ w. y. h8 a) i/ J
- state.running = false;; }" D/ E9 U) U' ]2 @
- state.f.close();0 x$ E" U/ e4 d
- }* \- W/ c3 U' @6 r1 M0 C
- ; y C: b" y6 w5 U' c; a2 I6 `
- function setComp(g, value) {
: c" X0 t+ q! e, R( Q7 N d8 M) O - g.setComposite(AlphaComposite.SrcOver.derive(value));3 e2 d+ m* Y+ z) e; b. c) k
- }
复制代码
~7 a$ ]* _5 a& k% j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。% M6 d: W! T- A+ w# ^) b0 i
% K6 G/ Z, e. e6 T) E( y
* C, i: R4 p5 \" B* F, s% i. u3 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)1 b5 X# h* b- ]
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