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* M$ D1 t2 [9 o! Q; x8 W6 D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。7 K0 S+ |. u- k9 @" ^
- importPackage (java.lang); m' o. b6 p) R- U( Z, l
- importPackage (java.awt);' b, e7 ~, o! v6 i# B7 f# N8 J; \
! _' C d' I4 a- include(Resources.id("mtrsteamloco:library/code/face.js"));. e9 ~. b, h; L g
- 7 b( C1 y$ q1 f! }, C
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 G5 b3 w: i+ Q6 t4 r
- # U$ q- p2 F) }- j
- function getW(str, font) {9 M; \6 j& ?) B0 D
- let frc = Resources.getFontRenderContext();
3 a: M) D& Y3 s w6 h& L - bounds = font.getStringBounds(str, frc);( {" q+ n" p# K/ m' r6 V+ K
- return Math.ceil(bounds.getWidth());
* C" S W) @: }; i+ F: r7 O - }
5 t$ j$ C+ ~8 R( B+ o
! k1 \) j4 [# A* `- q- da = (g) => {//底图绘制
; {, T% O. E# B& p3 D - g.setColor(Color.BLACK);" y o5 {6 y) C& v, r
- g.fillRect(0, 0, 400, 400);2 d, E" Z4 n8 m1 M
- }( R7 y+ c1 i4 K8 o2 J( C# U
: t Y# w; p- k$ k; p- db = (g) => {//上层绘制$ T7 a: s* o6 C- }. B K, @
- g.setColor(Color.WHITE);+ s* _0 P& {5 _: O4 K4 ^
- g.fillRect(0, 0, 400, 400);( }* Q) _! b- P- m* ]
- g.setColor(Color.RED);
/ Y( u8 M" h [) ]! ] - g.setFont(font0);
4 t! V2 m8 a: \8 Z7 O+ r# M2 A - let str = "晴纱是男娘";2 ` H* `! g( v6 L5 z
- let ww = 400;
! y3 m8 p0 o# l2 b - let w = getW(str, font0);- v* @/ O9 h# g2 k+ N9 c
- g.drawString(str, ww / 2 - w / 2, 200);$ |/ p3 @1 S) |6 \7 I# n1 s. t
- }2 K; p3 d+ y! c2 V; r
- - t! x1 g& W7 o" ?8 Z5 Z9 P6 Q% l
- const mat = new Matrices();4 `* g0 `5 {% @
- mat.translate(0, 0.5, 0);
2 C% J+ f) B5 E O7 E" Y
+ \ [; {* l; E) T3 G% p* v9 {- function create(ctx, state, entity) {
4 y0 ?3 d& j4 x4 x+ D - let info = {' \5 M) P6 t' r% r/ y
- ctx: ctx,
6 B* G/ k' R+ v$ A# H - isTrain: false,) `7 q* R: E- u$ s8 T3 z# T
- matrices: [mat],7 Q& E c* L7 a3 R* A( R
- texture: [400, 400],
1 m( q, d$ x/ `+ @6 g - model: {: d, ]/ d: j! X) \0 G. `8 [
- renderType: "light",( _- X/ Z1 o2 N! V- p& G1 [6 ^
- size: [1, 1],+ C* I# M: S9 P3 J
- uvSize: [1, 1]
: P) w, C4 H! d- E$ [ - }
$ w$ k" U: o: ?, u - }
: h; j. b" h4 ]8 Z - let f = new Face(info);
6 l6 R0 e( f {% Y. s - state.f = f;
! S9 l" L9 t6 ~- ?- g - # C1 R- `, O0 I; Z, r& \- n8 Z
- let t = f.texture;0 W5 U0 d7 h. }+ o1 i
- let g = t.graphics;
2 L9 k8 g. g6 [- y0 Y8 ?+ ? - state.running = true;2 r2 i' c" ?3 x" e: p
- let fps = 24;
* v* z/ r. \: H/ |: } - da(g);//绘制底图- a8 k7 l( `, Q' T" B; `
- t.upload();1 g5 [ `0 o' o% k+ T3 ^
- let k = 0;( K# F8 f# d# T0 @/ L
- let ti = Date.now();9 D; U5 x5 E( J; Y+ i9 V& O0 o
- let rt = 0;, G9 [6 p5 W# L& D9 t. [& ?
- smooth = (k, v) => {// 平滑变化1 m& z3 z4 A- R1 a0 k; ?' G/ b
- if (v > k) return k;
8 T5 e: J! m1 k" y/ Z - if (k < 0) return 0;
0 b6 T' f) N6 V8 ~ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
1 e; i! V+ J* a9 e4 g$ x4 i+ ~/ w - }
" G/ P) q, T. v$ y/ c" { - run = () => {// 新线程
% V! Q9 H6 Q- _1 x - let id = Thread.currentThread().getId();# `% ` W* V. Q6 x! H# W
- print("Thread start:" + id);
2 z& {2 u; U5 { - while (state.running) {* a1 }# L5 `9 _( G( j
- try {
5 T2 G2 G" b$ g7 u. Q# r - k += (Date.now() - ti) / 1000 * 0.2;2 E- m! U Q5 p3 e5 a) A8 _0 S
- ti = Date.now();
/ M6 S% r. q# P6 C - if (k > 1.5) {
8 L+ c. F" f* v1 \# q - k = 0;
7 Y n4 N9 z; V9 O4 o# |! R - }& y5 E- v! y! ?" j0 [
- setComp(g, 1);
/ @$ y0 P8 p" c* b, O( k - da(g);
" ]5 C7 x# c$ l: F0 Z- T - let kk = smooth(1, k);//平滑切换透明度& [: s8 [4 G4 i* S' p3 `
- setComp(g, kk);% E! n, i& t3 I a, k
- db(g);* B; v' [, A" z" x) e
- t.upload();
7 z1 J! E3 ?& @9 c - ctx.setDebugInfo("rt" ,Date.now() - ti);& b4 t4 I) T- X) V" C+ V8 J
- ctx.setDebugInfo("k", k);
# _" b. d* O$ k* }4 U2 B, @2 n - ctx.setDebugInfo("sm", kk);1 Y- e l u ?* t
- rt = Date.now() - ti;7 P% A9 p; J% D& _. X
- Thread.sleep(ck(rt - 1000 / fps));
& Q( J* e( c2 d2 H - ctx.setDebugInfo("error", 0)" q3 S2 ~" s! w
- } catch (e) {
# G G% A$ T1 D0 o9 M. _ - ctx.setDebugInfo("error", e);
; N) Y- |5 L1 n/ f - }* d- |. Q1 J3 E4 d) L' @# E
- }5 G; ^+ {. m. r; m- V0 @
- print("Thread end:" + id);6 R/ w, Y* _' J% ?, r9 d, y6 Q* T" {4 _
- }
' W- c2 R j, ^% W# e5 ]) _- I# `# p - let th = new Thread(run, "qiehuan");
) ]' ]- K+ y9 i2 b1 o - th.start();
) l. q' }2 D% @& ? - }. B% F; q) v1 B* C6 V& C
- $ n3 J$ @! F& u6 E' x
- function render(ctx, state, entity) {
& X* ^# O, L/ N9 W - state.f.tick();' p2 a$ D/ j7 g% D$ e+ P& U
- }4 y5 v, ~; {5 ?- a# K; V* g; i6 v' F
2 J0 g; c# k# |& d9 z8 F+ r. X- function dispose(ctx, state, entity) {. M; m4 m1 d& d1 b: { A( h3 r5 }5 r8 S- i6 L
- print("Dispose");6 |) i+ Y' i' _5 s4 E
- state.running = false;' S1 w" D7 h- X
- state.f.close();
, c! u! F% a- D1 j O: W& w% o/ | - }
; S: Q4 k" }% W. d3 L
% N2 d4 N6 F% `- function setComp(g, value) {
$ l8 }4 y F8 s* ?2 B - g.setComposite(AlphaComposite.SrcOver.derive(value));0 K! E. T1 Y$ a' ?5 N( H, @ |
- }
复制代码
# a5 p" |5 o1 A. k( k6 ` z* q4 U [5 x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。7 |; o+ X2 j/ A8 Y9 X w2 }, W
# L- S8 M; y% G2 P
7 {. O* u3 f6 M) E0 [ E0 `8 w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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