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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。) M% b7 ?, E1 G2 d2 ^! v; w
- importPackage (java.lang);: v+ Y3 ~: z% n* V* v/ y: w
- importPackage (java.awt);8 M/ H) f7 Y$ G' Y
) v& G. _/ w" O% E, m- y- include(Resources.id("mtrsteamloco:library/code/face.js"));* U, v. d1 d) Y2 B# X' p
- K+ O! A( R s- [5 b
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
* {: l9 l5 r$ V - " d3 S. `5 G7 }. r* F# l) P# z$ l
- function getW(str, font) {
. C9 ~8 O0 e4 O% C* z7 m& o - let frc = Resources.getFontRenderContext();
8 ~9 M" p% t8 `1 T- Q - bounds = font.getStringBounds(str, frc);
# j! V, ^& J( [' P1 o! x" d9 _ - return Math.ceil(bounds.getWidth());8 s! n( J/ d1 }; U: B4 S
- }
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, X3 }. K1 K1 {, Z, E# V- da = (g) => {//底图绘制
/ q3 |( }' F" a5 t) x/ H2 i& S - g.setColor(Color.BLACK);. H/ R! _. G* R, G( _4 P- X( I: P
- g.fillRect(0, 0, 400, 400);4 A( ]# q4 c5 k$ n* N1 F
- }
5 g% N) r. O1 ?' l - * z( t7 `% m/ ^# x |
- db = (g) => {//上层绘制 A. M8 o- W4 r! j6 z/ ^) K
- g.setColor(Color.WHITE);
8 _* K: p" ?" ^ - g.fillRect(0, 0, 400, 400);8 o; a) p% Z( L* ^% }6 L- Z+ }
- g.setColor(Color.RED);% `0 I# i3 v# E' y1 o P- u
- g.setFont(font0);. {) z0 \! b) e
- let str = "晴纱是男娘";) d$ K* ^6 i" ?# [5 t$ S" Q2 g
- let ww = 400;' W7 @$ C4 e6 W9 A: m
- let w = getW(str, font0);
5 Y6 D8 M7 w4 s7 R L! _ - g.drawString(str, ww / 2 - w / 2, 200);; w0 A4 k A" H
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, ?; b3 K: V& ^6 Q- const mat = new Matrices();
' S1 B! j: |- _) ?. p l* N - mat.translate(0, 0.5, 0);# B9 b- C! M$ {- W+ {7 s" q
- : n0 ]1 b9 g0 t* s1 k, M
- function create(ctx, state, entity) {- R; Q. x5 m( `# }8 J! A0 e
- let info = {
/ c- h( |: [7 ~/ m6 ] - ctx: ctx,
1 C N7 [& _8 \$ ?! l - isTrain: false,% Z3 T( @% V" A6 w
- matrices: [mat],
+ Z: t. v- T) H+ b. C1 O0 ]! Q1 ~% o - texture: [400, 400],
. P5 `$ C5 i, ^7 D" q' t1 k* K - model: {
. z1 G( F0 {. a* ~. \$ ]' j; s9 f n - renderType: "light",* v* o$ r# p" k4 K! o* _' u
- size: [1, 1],
3 S6 b) W- t3 ]6 ~: ^9 x1 b - uvSize: [1, 1]% `% g+ d& C; g! _) q1 m7 A/ f" u
- }8 A' g0 X! L. \
- }! t' J3 i; `. y. B6 i' w' j
- let f = new Face(info);7 z' n8 Y$ G+ Z) Y! ^
- state.f = f;+ |0 D* K! {! y/ w
- 0 F( g2 b- g" z+ i* {
- let t = f.texture;, y- A. d) r2 I& {$ M
- let g = t.graphics;
0 k! D+ I9 v! w: c& H - state.running = true;: v% S# k) u) r1 `
- let fps = 24;
1 d; S& y( u6 |4 Z - da(g);//绘制底图. p; X8 p0 R( b* x8 w/ p! L: R6 a
- t.upload();
8 l/ |% a- V! L% Z' Y$ c - let k = 0;+ M$ b- f$ t* C# M
- let ti = Date.now();- ]1 j `. \$ j5 N$ Q# B. w
- let rt = 0;
1 b b1 A# b U( W, G1 N - smooth = (k, v) => {// 平滑变化
) f2 P; U: b$ K - if (v > k) return k;4 @& i6 S f/ K+ {
- if (k < 0) return 0;3 B# i- z! I3 d9 @. B' A6 e* d5 }
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;; H8 v8 n o7 @2 K7 w6 ^5 U
- }
s! ]+ i) r* l& a5 B$ u - run = () => {// 新线程" H }9 ~0 [# z* _4 t9 A4 E5 Q, @
- let id = Thread.currentThread().getId();$ P4 Q _5 D- X
- print("Thread start:" + id);
5 T# k0 U+ a3 Y @ - while (state.running) {
# q0 w+ M% X/ N+ t# a: ~ - try {
4 \7 B* X$ b6 t, `- J - k += (Date.now() - ti) / 1000 * 0.2;: m5 K: |; s9 }$ H9 L
- ti = Date.now();
! N7 E4 z: {% E. L1 g - if (k > 1.5) {
n; _! g2 K0 U - k = 0;) C8 }" Z9 M; H
- }
; k0 h! B ?, v W/ I - setComp(g, 1);
% N/ Y" x) w4 f( c6 _+ I- B - da(g);
% L/ T8 r J7 u9 | - let kk = smooth(1, k);//平滑切换透明度. h2 t# ]* A+ ~ e3 s
- setComp(g, kk);1 Y. k D) I5 G: Y) ?. V
- db(g);% M' z! d# y7 Q R, f/ l: f# N7 `4 Q
- t.upload();2 o9 q! r3 E5 U% a. I
- ctx.setDebugInfo("rt" ,Date.now() - ti);
; C. j) W* W1 }6 t0 Z+ d3 X - ctx.setDebugInfo("k", k);" ?% Q- q& [, _; X5 i8 c
- ctx.setDebugInfo("sm", kk);
( ?. S/ n% K( b. h - rt = Date.now() - ti;3 m! W# u0 S6 z! L/ ^
- Thread.sleep(ck(rt - 1000 / fps));: [8 }% F' F% v8 K
- ctx.setDebugInfo("error", 0)
. W0 h4 [2 w% N( [ - } catch (e) {
& e1 Z. @$ Y+ \8 [& _# |% g9 c - ctx.setDebugInfo("error", e);
; f! R' Q, b' @: ` - }
1 M) Z+ x6 b5 f9 Y: d* [ - }& O2 \ v/ G$ m, } ]! F7 a" e$ C
- print("Thread end:" + id);
: W" I( s- v% a# ` - }
& K/ F7 M5 _1 V - let th = new Thread(run, "qiehuan");* n, E n) x0 w/ \7 J( r
- th.start();
% w: ~" e! a* n8 [) ? - }
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1 v, J/ }8 t5 s9 Z- function render(ctx, state, entity) {: C' L$ P' V, r
- state.f.tick();2 x) I5 C5 U' A3 `
- }
' F/ h' ?) D" ^ - : H/ T* D( y; e, `9 ~
- function dispose(ctx, state, entity) {
- S$ r0 F1 G! a! {- I6 f - print("Dispose");- {7 D* F5 e X7 R
- state.running = false;
6 g; B0 W( i! Q4 H+ a0 K3 h - state.f.close();
/ _* h6 U. o' L6 Q( e - }
6 P( o: A% m7 K- Z# e7 [5 O
- a; \" J g+ ?" C5 J/ f) O* ^- function setComp(g, value) {' D$ r( I! T+ [( m! ~# i. O8 R7 l
- g.setComposite(AlphaComposite.SrcOver.derive(value));
/ s: V% |6 Y8 s - }
复制代码
' J- p9 S* R6 `5 a' c0 D) e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 L. R5 s& I2 u/ [" F
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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)( l* t7 p& g: u3 O6 n8 A
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