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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。
; r9 a2 L1 z$ z% O- importPackage (java.lang);; c! y) z+ F8 F
- importPackage (java.awt);
' `- A; q3 F8 D
2 ^, N0 T2 b2 v* A4 P- Y* y0 k- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80); F' i2 R7 b. @6 ?! e. |
- + M7 J2 m; Z2 J4 r
- function getW(str, font) {" }4 i' y! ], [ q
- let frc = Resources.getFontRenderContext();
/ T3 X" c' a! N' g - bounds = font.getStringBounds(str, frc);) ^4 y: E$ c/ H5 S+ o* n9 g
- return Math.ceil(bounds.getWidth());
5 V, q+ H& { E - }
' r, @( I: x9 _: a/ t
" X9 ^' A7 i) w, H5 D, J* Y0 ~% s- da = (g) => {//底图绘制
9 _7 f* g& T% l) ?$ w - g.setColor(Color.BLACK);
1 N& v& u7 E4 X* V( N1 O( y - g.fillRect(0, 0, 400, 400);
3 G, k( C, n8 \/ G - }; ^0 v- H" z# r! X: V" ?
- ' k0 ^& r% y, n) g* t; G
- db = (g) => {//上层绘制. _( f! Q! k$ [' I, L9 V. l
- g.setColor(Color.WHITE);
9 g% d: J; y8 y- I' G* |5 T ~ j6 g - g.fillRect(0, 0, 400, 400);4 a! n' H: @/ v6 k
- g.setColor(Color.RED);* b% S. E ^) ~; G% B! O
- g.setFont(font0);& l+ A# g, J* S. o
- let str = "晴纱是男娘";5 r0 W* j! a$ s
- let ww = 400;
3 W1 K8 k; r j - let w = getW(str, font0);
) r) t! V3 G! ]% \ - g.drawString(str, ww / 2 - w / 2, 200);
! U* k6 b6 `6 A - }
& A1 Z* c+ h, v6 F
5 }" b8 R" v% @6 B3 O% D- const mat = new Matrices();& l q/ K9 v3 l
- mat.translate(0, 0.5, 0);8 }3 K/ Q; h/ f0 r$ W$ R8 Z4 e
* ~! x3 _- \' T, M5 i/ b, }2 c- function create(ctx, state, entity) {5 v8 B" _, e3 `% E4 P+ G
- let info = {
+ J8 S" Y' u7 u+ ~$ T! m; P1 i - ctx: ctx,
^2 }/ ?* x" n" z) X3 R& K - isTrain: false,
- c* {) K* z4 [0 Z$ u( N& X - matrices: [mat],( `6 M3 g& Y- G9 V
- texture: [400, 400],
* A3 p. ~* q7 v6 l - model: {
3 J# r* [* C% o# ]% ? - renderType: "light",0 N* L1 {% [ X g2 U+ ]7 D
- size: [1, 1]," L, s9 b( H- ~6 P5 p! S" c0 ]
- uvSize: [1, 1]
9 X; \/ }2 y; i- i/ m; f, |( p- P$ j - }
$ V9 r$ I. n9 Z' x3 w/ D7 W$ a& z - }
7 G3 t8 \6 k* U( G- \6 ` - let f = new Face(info);( V7 W3 v: E" x, P# K: l" f0 Y
- state.f = f;
1 R4 R8 x8 v) p, N/ W# }# u - , t- W# ^% N) q/ j) s' o" Z& R: R, c
- let t = f.texture;
, O p" ^, f( i# l+ n) U4 A - let g = t.graphics;; I1 U0 `) y6 `: w2 m( I4 J9 j
- state.running = true;
% B+ e0 Y' k2 P0 v' ~$ ~ - let fps = 24;8 J- d6 F" y+ ~! D9 j: d
- da(g);//绘制底图: }+ \/ ]0 e; ?1 l/ o# r* K
- t.upload();) ]# l1 _, c7 d$ o9 |" g
- let k = 0;
; T1 d Y# A) C - let ti = Date.now();
/ W4 r! D1 l6 f/ c% ~4 @' w: B- c - let rt = 0;& h* s+ `1 n; o6 {
- smooth = (k, v) => {// 平滑变化
1 t' i9 ~' I0 Q1 A - if (v > k) return k;
( }5 }" @4 i' x/ |+ k - if (k < 0) return 0;
y" |3 R' U3 Q - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
/ X# q/ y. m0 X7 L4 S8 Y - }9 u, `- ]1 b1 S o5 w& w8 n
- run = () => {// 新线程
' I1 V# c2 X6 I - let id = Thread.currentThread().getId();5 J; K; l6 |, l+ J5 }9 h! v5 l9 ~) O
- print("Thread start:" + id);% k0 H o- b0 V& d
- while (state.running) {9 M4 z5 j% V- O* |0 n! G/ k' z6 w/ w L) u
- try {5 P7 ?% [+ V6 B0 h1 n- f& ]. P
- k += (Date.now() - ti) / 1000 * 0.2;
8 t; U+ e1 X, J! ~ ]+ b - ti = Date.now();" K. F, A+ x. b" C3 k8 t5 W: P5 Z/ X
- if (k > 1.5) {
- f2 ]0 F) O0 _5 s - k = 0;
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- setComp(g, 1);
# \- e' P; ?& a; r) j9 ?; T$ K8 r% k - da(g);
9 Q+ p8 o- V+ n0 ]+ s5 C - let kk = smooth(1, k);//平滑切换透明度
0 f- F" U# a' y' D& _ - setComp(g, kk);
+ C4 S* |( V5 | - db(g);, q6 b0 T8 i4 }3 M3 f- Q- X
- t.upload();
- x% S* U- G& _! A9 E - ctx.setDebugInfo("rt" ,Date.now() - ti);! b2 M2 ], h$ h$ E1 X
- ctx.setDebugInfo("k", k);
8 Z4 e0 C6 c& H - ctx.setDebugInfo("sm", kk);
3 _+ x" B( X7 N5 z% K$ b3 ^ - rt = Date.now() - ti;
" [5 R5 }( m# \ v1 e - Thread.sleep(ck(rt - 1000 / fps));6 v; R$ t& S& K' Y6 p
- ctx.setDebugInfo("error", 0)( n; `$ Z3 ^6 \; K/ z
- } catch (e) {" \& Q* o4 f# g7 I+ w
- ctx.setDebugInfo("error", e);
- u1 j* v0 P. k+ j0 @2 S, X7 l7 G - }
* m1 n3 \/ D' D - }
; F0 [# W- y- @! e4 U$ e# i - print("Thread end:" + id);
* E" M2 |$ D+ S4 u - }; `8 j* j" {' Q4 `4 r2 x3 u
- let th = new Thread(run, "qiehuan");7 w; ^ h" o/ y& E
- th.start();* S& O* o/ o: r
- }
& Z7 W( T ?4 R1 p3 ?; g1 s
5 J" }4 z# Q! `$ t0 z& D- function render(ctx, state, entity) {
. ~4 l1 ] z# {: a - state.f.tick();+ ?/ Q7 J) k+ X2 b
- }. j3 u) m q+ P' Y6 m
# g2 D& r l9 n" H& E- J* h( ~5 i4 W- function dispose(ctx, state, entity) {
9 M* C" U1 B2 x/ d6 j - print("Dispose");
0 U! ?9 m$ ?/ F) i7 m3 }! ~ - state.running = false;9 q& S$ J3 X6 e' I. L( @5 A
- state.f.close();
" q+ n! o8 t' e9 R! b8 c- R - }
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- function setComp(g, value) {
0 E7 S4 X r2 y4 w$ d5 p5 L - g.setComposite(AlphaComposite.SrcOver.derive(value));' o- A6 ~) t/ x; P
- }
复制代码
$ u3 g. t8 \: E0 ~8 g# P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。
0 r5 q, c9 i# _: \! b$ q4 c" M2 O' ?9 t- u" B' O7 Y) ^
% k& O+ u2 P2 o& w2 f/ 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)2 H: e% B1 Z% X+ P
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