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5 D* W- {1 r' t2 {% v+ w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。
+ e3 _$ {- ]7 f- importPackage (java.lang);: _" [- q' d- q# a, Z/ x) s( a: o* i
- importPackage (java.awt);4 o! o* k) b8 @! s5 y; |0 k. Q+ I
- 2 H+ t+ p+ @* E
- include(Resources.id("mtrsteamloco:library/code/face.js"));. u! E9 _/ [0 ~ u7 Y* ~% A4 q5 y
2 A5 W5 H O/ I- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
* ^# Q' B6 {5 c) M3 A( F
: v( m5 o T8 x% `/ O8 _- s- function getW(str, font) {
& q( z. j: E0 X - let frc = Resources.getFontRenderContext();8 g# f7 F# |5 z" _. ~) {
- bounds = font.getStringBounds(str, frc);( H- |+ g* P/ V8 w
- return Math.ceil(bounds.getWidth()); }% e, F1 S. H6 J. b. o
- }
0 i1 T# p, o7 o5 p/ w/ y" W' {
, z6 B3 K8 f* \2 {- da = (g) => {//底图绘制
G+ h9 n- Y; B7 B$ a - g.setColor(Color.BLACK);
+ y. t& J; p( M. y& z - g.fillRect(0, 0, 400, 400);
2 t, X. Z8 t9 b - }
& o% h# O, b. I% {; S4 [* t) l - ; s$ j9 j5 o" Q# @% G6 M
- db = (g) => {//上层绘制( h/ \8 J2 S5 {5 Y+ B% c5 F3 {
- g.setColor(Color.WHITE);" j0 E/ Z' |; i' g. ` a
- g.fillRect(0, 0, 400, 400);9 ^# Z9 @( Y) {
- g.setColor(Color.RED);3 A/ Z& w9 W& P: Y, z
- g.setFont(font0);
* J: F# X+ b* W+ Z0 b3 t - let str = "晴纱是男娘";/ T! C8 M& A( x2 F! \
- let ww = 400;- |& T, z9 O- j& v# \' C
- let w = getW(str, font0);
0 Z" C# \- R" i: x/ ` - g.drawString(str, ww / 2 - w / 2, 200);; i* v( _' K. f1 D( m: S
- }# d' ~2 U9 j' A: s) C
6 }, {7 u( e: I' x5 ]- const mat = new Matrices();
F, E3 `, ]& _ - mat.translate(0, 0.5, 0);: x. a2 b, W: b! k3 _6 I% t
% k3 M \+ E) j) N; h+ b7 B- function create(ctx, state, entity) {
$ I& b0 O$ o( J6 D2 a - let info = {( v, X1 H, f9 Y" W7 z3 y; M3 G4 [
- ctx: ctx,
6 n8 F- X7 ^ P5 l7 z: ~: u- h$ ~ - isTrain: false,
& `, c: ?" Q- ~1 m5 t; {4 n - matrices: [mat],
% ?8 R( R& n1 k. k: o - texture: [400, 400],6 ~4 H& H5 R! s8 n2 v
- model: {
/ p- i8 d6 \3 h! m, g - renderType: "light",6 G9 H9 p) l, J- k
- size: [1, 1],
/ H) `: F2 w- _' x& F' L, j - uvSize: [1, 1]% {" ~1 G& ^1 N0 U( [, _2 e
- }
. n4 I: T+ H2 R4 I - }
# s9 f& O6 A8 ]. X$ C8 v X - let f = new Face(info);6 i9 H8 [, I& c, n( ]+ }, ^
- state.f = f;/ B/ L$ [# R( ?2 l5 g
- " l" n W2 ~9 s/ t# a( V6 c; Z1 x
- let t = f.texture;, ]7 j8 E9 F: y: m
- let g = t.graphics;
) u5 [; y% T6 u - state.running = true;
. i. X1 j) q6 H3 Z- d: I+ w, P - let fps = 24;
' D3 d4 i6 A( i7 W' H& h& t - da(g);//绘制底图
7 m5 v8 O$ \. }" v - t.upload();! f$ C. }; Z" \( R8 B
- let k = 0;
. q- Z: ^& E3 K- ] - let ti = Date.now();; S7 k( w( _% R. a- s
- let rt = 0;# H, x% e# Z2 q+ _* H/ x
- smooth = (k, v) => {// 平滑变化
2 e3 d' e3 z( n$ A! [/ w - if (v > k) return k;
1 {! I5 W0 T+ G( F1 K - if (k < 0) return 0;
5 t7 N; J! B/ b$ F - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;" N+ M5 [3 }& D" ]; U3 @
- }
7 r4 y) I. ?" W# I( F9 R5 X - run = () => {// 新线程
. x+ [8 z3 a$ m* A. W+ j' A - let id = Thread.currentThread().getId();* M1 c( n- p- [6 x
- print("Thread start:" + id);
" U3 Q$ a3 a1 W; D0 C0 Q4 i - while (state.running) {
: ~+ c+ _" m0 d/ x, e+ Z' E/ _ - try {
/ {7 h2 ^/ T0 ]2 `( ^- h( I - k += (Date.now() - ti) / 1000 * 0.2;4 y/ |2 E; z2 X
- ti = Date.now();3 U0 D5 M, N1 N0 Z+ O7 t3 {
- if (k > 1.5) {
& a* x: r: [, `6 f6 { w - k = 0;5 _: s( s8 C% q M: u S, P% o
- }/ X7 ?6 g) A. z3 p. H! n
- setComp(g, 1);. E; O4 B+ e( W, ?2 v& n2 H9 }
- da(g);
' [4 o% L w3 n: @/ R D - let kk = smooth(1, k);//平滑切换透明度3 a" m" m. ?: V% g
- setComp(g, kk);' g% t5 i9 O# j5 j; [7 ]
- db(g);
7 Y2 G& Q; f$ g8 H) ^ - t.upload();3 w# u1 a# x( e! R
- ctx.setDebugInfo("rt" ,Date.now() - ti);
9 l7 V3 D3 l0 C4 C# A2 i. p, d% D - ctx.setDebugInfo("k", k);$ R: W0 m, ^) Y3 t& \ i! t
- ctx.setDebugInfo("sm", kk);
; w/ c2 x7 f. T, a! I. E7 S- V, E - rt = Date.now() - ti;4 j! z$ W! k( u4 A$ s4 f
- Thread.sleep(ck(rt - 1000 / fps));
3 J( ~0 @# ~# b! a! @% Q% \ - ctx.setDebugInfo("error", 0); \# d. _3 t- |- Z. h
- } catch (e) {; {' o) |3 O5 s# Z
- ctx.setDebugInfo("error", e);' W; P! @% h7 ]; ~
- }
* q/ t9 P. d# @* N7 N - }
) p5 E6 \4 p& m- M. O% D2 ~ - print("Thread end:" + id);
0 H8 o3 }) C% f0 B2 j& x - }) q( Q7 `% p5 ^6 H' o) L" s
- let th = new Thread(run, "qiehuan");0 Y2 K8 x( E- ]$ @4 r3 |
- th.start();: `* h _+ M9 @: A, D, j2 i6 g
- }
: Y1 n+ P/ ~* P! V8 |
. j# Z7 A& ^4 Y( T& k% l- function render(ctx, state, entity) {% r, j, B; X! G0 Z" o, w
- state.f.tick();
7 J! T. W1 S5 d; w' v X - }0 ]" F: M6 E0 B8 G5 I* H+ O4 W2 V
- ( [ ^8 }2 j- ~) ?
- function dispose(ctx, state, entity) {6 b) x9 P+ ~6 Z
- print("Dispose");
H/ z9 z X. Y2 U! P/ E# t& h1 Z$ g - state.running = false;; q$ G. J7 R \0 F; }
- state.f.close();
0 Y: {& i( i9 O8 c2 d - }
, A, A9 S# y) R- q
- R) n! G3 K# n1 o- z- function setComp(g, value) {
7 Z) S8 ]" w' n8 G+ M$ M+ v! W E - g.setComposite(AlphaComposite.SrcOver.derive(value));
6 L% `' f* q# U- R - }
复制代码 + o3 u" h( j* q( 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。
8 s& f4 ~. O% Z4 M* T6 ? o; }* a0 j- @) \* V
' c' }4 j/ G- x. o" s
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)4 P/ W5 l4 ~' I7 i$ V, V- L
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