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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。
' c' I4 i* m7 u! P. w K0 m( A5 W- importPackage (java.lang);" g7 `: h; B5 Q7 `) K
- importPackage (java.awt);' G0 Q. K# K* b: N7 s% |( ]
- / g. V+ H+ h& v0 B' n. X
- include(Resources.id("mtrsteamloco:library/code/face.js"));( n) P9 H8 t. O6 N9 B: ]- \
3 F$ s8 z. t3 q- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
! `: C0 Q4 U1 q
8 A0 M8 V, z0 H. f- function getW(str, font) {1 q" x9 u) L/ g0 X
- let frc = Resources.getFontRenderContext();9 B" X2 c+ C; s6 x
- bounds = font.getStringBounds(str, frc);
8 ~2 V6 }) A( r1 P m H8 W- ^ - return Math.ceil(bounds.getWidth());
/ j% a# D; c/ P1 @" d7 V9 Z, O - }
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: b0 g# Q Y9 f( R9 p- da = (g) => {//底图绘制/ ~) ?: Q+ r) _: M& D; U
- g.setColor(Color.BLACK);! K/ I% H1 x( v6 O
- g.fillRect(0, 0, 400, 400);! p1 V! C5 Y, p1 S0 A- B) O4 m
- }
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- db = (g) => {//上层绘制
0 |- \. M* j3 M1 A! W) ^' O - g.setColor(Color.WHITE);+ o, l! [) S3 o
- g.fillRect(0, 0, 400, 400);4 Z* W2 B( \6 F* e: _( p4 g5 R
- g.setColor(Color.RED);/ ^& F5 J( H7 I2 O, O
- g.setFont(font0);
: p+ D; W; ]6 t* r' c( C2 t3 e+ } - let str = "晴纱是男娘";
9 T, B- u4 j) M. _/ U - let ww = 400;
8 N j" u1 z# N( s2 G0 H1 m - let w = getW(str, font0);
e2 p$ i0 k- E8 M' | - g.drawString(str, ww / 2 - w / 2, 200);$ L6 {5 e. ]. l, ` V
- } l. x6 D0 w0 d2 s; n8 y
- 0 C% |8 g- Y o$ a# d- R
- const mat = new Matrices();
" i+ `7 C$ w% e3 M! K8 ~ - mat.translate(0, 0.5, 0);
, o' L2 ^( O6 N0 F - % o. C% y* y+ J( l- c N% q7 ]
- function create(ctx, state, entity) {
- Z( A2 h" F; I4 B - let info = {
- I3 A0 }3 t# i4 ]2 \ - ctx: ctx,) n6 G& {, U) [ m* n0 Y g" b' w
- isTrain: false,1 G2 p6 Q2 \! }1 Q& R
- matrices: [mat],
/ ~( ?3 f+ ^: \) K( V# J - texture: [400, 400],
5 G& k$ _9 J2 i+ y - model: {
; u9 _/ F& r" {9 o, k9 L, o2 t - renderType: "light",
5 K" h/ E2 q& m+ E. B, i2 K6 }1 F - size: [1, 1],5 Z: K) N4 P5 P9 e( K
- uvSize: [1, 1]
6 N: ]$ g5 ]" z1 }. `: X - }
- x# y9 Z3 w% a+ X: W - }
+ H: L# q1 C: C9 F! s/ n - let f = new Face(info);" g- L8 F1 y8 a3 n
- state.f = f;* l) E0 c1 Z, `# x3 e+ J
# Y* Q7 A8 W. ?( E% _- let t = f.texture;
' V! w7 C4 d& w4 h8 j" ~& S - let g = t.graphics;' Q4 R* T" \8 N# j( |0 H
- state.running = true;" C6 x0 d- A& A0 t
- let fps = 24;
0 F2 s# K0 V: U- H1 x' i; ]9 }; O - da(g);//绘制底图
) s; d3 t- `* U4 B- x @9 Q7 u6 h - t.upload();( u) y& s& v) W; `5 b/ K" g! G" Z
- let k = 0;, B6 P& t, w7 S8 z' n4 z7 r. S s+ W
- let ti = Date.now();/ j; W" b o9 Z" V: ~( B
- let rt = 0;
0 X G( N5 T) x& ~5 f9 N - smooth = (k, v) => {// 平滑变化4 U: S' a# T$ z0 w
- if (v > k) return k;
6 A! X4 x0 m' [; m- N4 Q& ^- p0 I% n - if (k < 0) return 0;
# ~: o. o, Z# T4 F+ ? - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;1 z* x9 |, N: d# I2 }3 ~2 r, ]
- }3 G* S: n m2 }& h. c
- run = () => {// 新线程
* w/ u) d4 q0 O; M8 Y! G5 @ - let id = Thread.currentThread().getId();9 z' S) u0 @( `$ G) l2 ~
- print("Thread start:" + id);
( f. ?, d' k6 ]7 [; N$ _/ E+ J8 ~6 D4 T - while (state.running) {" W% n, H3 H) V
- try {, ^0 w4 [/ p- q8 M
- k += (Date.now() - ti) / 1000 * 0.2;) I# e. }. I; C0 M+ Y6 H9 G6 c
- ti = Date.now();/ G3 p3 ~0 g2 z8 J1 n4 h$ [
- if (k > 1.5) {
' a& T6 `5 y* W, _0 s - k = 0;
0 I; ^1 Z6 w$ t) s0 | - }
$ d" N* N# F V& S; R8 a7 H1 r - setComp(g, 1); ]( a- x7 h4 r1 b9 T
- da(g);
( a* V, U, B; W. h! J% q( R! m* p6 z9 p - let kk = smooth(1, k);//平滑切换透明度; J, ^0 U! l8 g" b, \
- setComp(g, kk);7 |( Z: p R7 h- G$ m9 I' I3 |9 D2 w/ q
- db(g);' ]0 L3 |$ u2 _: | R4 Q
- t.upload();5 y% t5 [6 w) D( g( r( |. L- i' I
- ctx.setDebugInfo("rt" ,Date.now() - ti);: b% U& Y, j# K6 `7 b
- ctx.setDebugInfo("k", k);
, u7 p/ @$ c E9 u - ctx.setDebugInfo("sm", kk);. O! o2 n8 t. S d* [1 b0 D
- rt = Date.now() - ti;
! J$ G2 K6 a9 M j8 `) `4 c - Thread.sleep(ck(rt - 1000 / fps));
# D0 `1 A7 d7 ]; a - ctx.setDebugInfo("error", 0)4 j7 |& [8 ~% Z+ ]. ?# o0 J
- } catch (e) {
, ?! W. ?1 e* O# m. F; m- B# i - ctx.setDebugInfo("error", e);) s2 O4 z5 I2 k- p
- }: H) @, h0 p! d1 O
- }
" e; V& t8 n5 ^: Q1 R - print("Thread end:" + id);* ~! p% u4 K7 H1 z2 i) ~# ?; w
- }" v9 y: r/ T3 N' T: ~
- let th = new Thread(run, "qiehuan");+ K, h2 T7 ` y& s2 B
- th.start();( b2 |9 j* J8 K
- }
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- function render(ctx, state, entity) {) z3 `. {$ ?) E% Q/ K
- state.f.tick();3 T( }% j4 {1 L8 M) u
- }/ B1 v* g# V" l. S
7 R, d! p" _8 B- function dispose(ctx, state, entity) {; d- M/ R, j6 X0 w6 T3 @6 T9 c- `
- print("Dispose");
% `2 W3 a# A5 i6 {8 M( d( a - state.running = false;
3 P2 x* J ~; W$ e$ a - state.f.close();( h& c y3 s9 t
- }
. z/ f7 ^% h b+ }- _/ ~/ v
' I5 h# C6 N0 N- function setComp(g, value) {7 |7 C- x2 I2 F0 }; y9 S
- g.setComposite(AlphaComposite.SrcOver.derive(value));
6 \: E' S1 F! q6 k t) Y9 H O6 ^ - }
复制代码
( Q! Y. S0 p* W6 g3 M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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! n3 x7 d6 F1 l5 \+ ^# L. E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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