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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。
- N6 t3 `/ E+ t3 H- importPackage (java.lang);
% F1 c* ]# F' S - importPackage (java.awt);8 i, x1 c4 }0 q1 B" T& Z) I- A
- 3 |) d9 a/ x( O( q
- include(Resources.id("mtrsteamloco:library/code/face.js"));1 h+ { N* g4 v2 s1 ^3 x
- " @: ]" d) p) o; _: }- ?/ Q6 }
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {! E- T/ |# @6 j) p
- let frc = Resources.getFontRenderContext();& N k3 g4 h3 `3 Y( s
- bounds = font.getStringBounds(str, frc);* u5 O7 L/ W U$ U+ \
- return Math.ceil(bounds.getWidth());
# _: ~# d" Z4 Y$ N - }% ]4 t* r4 R. e, d7 f5 ?9 M1 }
- 1 X% B9 _8 V6 e3 R
- da = (g) => {//底图绘制, W4 s2 Z! u8 x% L: R) ]
- g.setColor(Color.BLACK);+ z8 S& |/ N8 D
- g.fillRect(0, 0, 400, 400);. L5 |3 ]# Q/ `- I( g
- }2 V: s3 H; r2 E; y: [' s" B
! P$ P$ u- ]( c3 o6 @8 X( a- db = (g) => {//上层绘制
. q: H$ a9 F' D( S y$ N) Z+ I - g.setColor(Color.WHITE);
- |( }4 b) P! p7 t5 v8 ?: D - g.fillRect(0, 0, 400, 400);
; E+ w! w: n' Z4 ?; M5 K - g.setColor(Color.RED);- t$ B' z" k0 f8 x0 ^
- g.setFont(font0);
! W6 ~: R! z3 l7 S6 i# N, [ - let str = "晴纱是男娘";) y6 D+ n# d- x; G" a
- let ww = 400;
, T+ n$ `* J& v/ b) v; ]7 I - let w = getW(str, font0);
' {+ S# m5 B7 s# D. [4 |8 z% T: t - g.drawString(str, ww / 2 - w / 2, 200);' [ ^( L; M/ H+ b8 C7 [5 {- n/ Q4 G+ ^
- }
% |2 T2 T" @3 ~5 C" M, ^2 R
p X$ I; \6 y1 s' k5 u- const mat = new Matrices();) P( I* Y% H% g" x h
- mat.translate(0, 0.5, 0);% h/ q, W( U' f- v1 l4 s" t) |7 I1 s
- S" k+ h$ U/ ~3 Q. P) Z- function create(ctx, state, entity) {9 Y) |( b7 s: |- e3 b
- let info = {# n% _! L0 t& q
- ctx: ctx,& R5 [! A) w$ A% w1 ]% c( X' }, N
- isTrain: false,+ T( p; l1 x* y1 v, Y8 Z
- matrices: [mat],, z' y0 z4 ~( D' t
- texture: [400, 400],
- Z4 U, t, Q; `/ X - model: {% I( r: I. c3 `+ j$ a4 P8 y2 d0 q
- renderType: "light",2 v, d+ K% K0 _3 b8 X
- size: [1, 1],
5 Q; F3 z) [& b+ p9 j - uvSize: [1, 1]6 x& p* p' T! f7 B2 f
- }
+ t& ~, { v. k. v# @3 D" u - }
`( z3 u" W+ Z x7 P5 \: L/ V - let f = new Face(info);! }; l4 n5 g( D; j0 x. d
- state.f = f;, b C A/ ~) a Z. X6 G
- N3 B# B2 V9 R. {2 I5 r( h2 C- let t = f.texture;
! h! O/ W- }# j }9 R# I - let g = t.graphics;/ A6 F/ L2 P/ T7 z8 Y) Q2 b
- state.running = true;
7 W+ t+ }6 `" T/ S - let fps = 24;
1 K9 P$ P" L5 F) Y - da(g);//绘制底图
2 C* q/ z- y4 n. @( p4 V/ C - t.upload();
( T# R+ ?' C0 ]9 j - let k = 0;9 S/ L* i6 d/ Q% |0 T" A
- let ti = Date.now();! ~: k; }7 r# d3 _
- let rt = 0;( |3 w3 I. }+ N: J/ m$ Q
- smooth = (k, v) => {// 平滑变化
3 g- W' Q3 C' U - if (v > k) return k;
. E7 c; _5 o0 E7 e. x - if (k < 0) return 0;
$ d# C+ I4 c B3 ^- U; q" F" D0 [$ o - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
4 }" l7 Q/ \/ g4 u: t5 c - }. G# B6 G* O, S. }
- run = () => {// 新线程
# C8 `+ N" `0 [" H - let id = Thread.currentThread().getId(); y: B" U3 a3 ?+ c0 q" W7 R. z
- print("Thread start:" + id);
% S* G: y1 v& E Z) u* F - while (state.running) {
2 Q8 e# m/ Y, z& n- u; R8 [ - try {# H2 M4 P j% n" g Q
- k += (Date.now() - ti) / 1000 * 0.2;
1 ?' t7 }: u" Q4 A K' l- U - ti = Date.now();: q" ?: C0 x3 x% f. V9 G0 E- {
- if (k > 1.5) {) m6 ]+ {5 C& Z' o5 @+ Q
- k = 0;
$ {0 s3 t. T' w! a - }
2 f4 X! ~* w9 | - setComp(g, 1);7 x; b7 X2 f. e* v
- da(g);& Y3 E1 D: C3 t. o% c3 [! q
- let kk = smooth(1, k);//平滑切换透明度
! _' x5 p$ S* R5 Z6 O/ P' _ - setComp(g, kk);
( g) x/ o. V7 j! [; \5 W% M5 F2 s - db(g);6 a/ I R- k* w. T% o
- t.upload();
5 q) T, @- |; y9 o - ctx.setDebugInfo("rt" ,Date.now() - ti);# I" D! L. G4 ^' P: E5 ~( r
- ctx.setDebugInfo("k", k);0 g8 k9 T. A# M% p, G6 N
- ctx.setDebugInfo("sm", kk);8 [, P2 \& C% n1 P! z; b$ p1 E
- rt = Date.now() - ti;
0 v) A+ H, e" a& J- H \# ^ {5 P - Thread.sleep(ck(rt - 1000 / fps));
6 |. }# {+ v' o2 s: ^ - ctx.setDebugInfo("error", 0)( n) c1 ]" s( a* O4 g$ s
- } catch (e) {4 d# H5 T6 T) O9 _
- ctx.setDebugInfo("error", e);
1 g0 J9 J6 M) A \' b0 y5 [8 x, F: U6 ` - }
9 h2 c; @ |- g) n" x$ f- h) h - }
I& `5 T/ \4 e* L+ c* J - print("Thread end:" + id);
8 N; A" w' B; ~0 p$ g - }
% S2 T7 s' ]' f. a# }# R* D - let th = new Thread(run, "qiehuan");
B# Z! p/ C3 r# P( ^* T* i. F - th.start();
. @& ?3 R, `) k8 U/ V4 E - }
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7 x' T, I* B1 |" Z" u$ K- function render(ctx, state, entity) {. A8 R) i3 [, s5 |
- state.f.tick();
/ d$ D [# _. p6 `1 j/ U6 ~ - }
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- function dispose(ctx, state, entity) {1 n& N B/ h7 {/ a
- print("Dispose");& _% ?6 T& A) }% |( w! i2 b
- state.running = false;: a D1 w1 j+ G2 I
- state.f.close();
( v4 m8 D: O% B9 T; | - }
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0 A* O: u0 u/ X- function setComp(g, value) {
8 R, [' g) ^5 ^" j/ z6 n0 M - g.setComposite(AlphaComposite.SrcOver.derive(value));
9 B+ j `* s7 x" }8 { - }
复制代码
/ x* A+ o; v# o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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2 y; Z) Y0 s# C- X* V顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)8 `) |% }3 E: A$ x8 O8 m6 P
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