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8 W) w3 h+ D. g& D+ p! D9 S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。+ q* Z* v! j4 `7 X9 f
- importPackage (java.lang);
# I- @ D) Z$ h - importPackage (java.awt);% ^( P6 Z+ C: C% |: p* l% I
- 2 ]4 L2 }' k1 Q8 N. n4 L( ]
- include(Resources.id("mtrsteamloco:library/code/face.js"));6 ]0 u8 `; O7 L
+ h1 J2 ]6 ]- L5 ?8 z2 A- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);/ N: C& X G8 j6 d* f V" Z' Q
2 _3 Z3 \/ U" B7 w, h+ ~- function getW(str, font) {1 Z' x+ ^+ H. o, j' l
- let frc = Resources.getFontRenderContext();& k4 h9 ^4 z/ A- N5 ^# n& t
- bounds = font.getStringBounds(str, frc);
1 e: n0 k i2 _ - return Math.ceil(bounds.getWidth());
3 W; N& Z0 G. Y5 c! a - }
J5 k6 E) L6 C - - g9 n8 ~. c8 Z' m( z; W' J
- da = (g) => {//底图绘制
$ F, T' r3 s: `& v* q" Z4 J - g.setColor(Color.BLACK);
6 ?. A' w1 L% s: f" }" o - g.fillRect(0, 0, 400, 400);% V4 b2 A+ X( j" p) }* a U) @9 t
- }8 Y# p0 a+ Z: |8 |& s1 Y
- + v ~5 m& e7 t$ g
- db = (g) => {//上层绘制
O) s) k/ G) o* F J/ @9 \) ?! ? - g.setColor(Color.WHITE);' S, X3 u* ?: `$ U3 P1 I* U
- g.fillRect(0, 0, 400, 400);
3 N K% ?& L& o. W* r' T5 @ - g.setColor(Color.RED);
0 u5 F1 @' j8 y6 w0 ^ - g.setFont(font0);$ o' S2 q8 O! }+ v8 V! ^
- let str = "晴纱是男娘";2 A: a! V8 y+ q6 X. X2 Q: @7 p
- let ww = 400;& L5 \9 }3 ~6 n) N( x* ~3 [! L
- let w = getW(str, font0);
5 o0 D6 g0 _; ~7 ^: i8 T9 T - g.drawString(str, ww / 2 - w / 2, 200);
! N7 K: L) I9 G( \! u$ n - }
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9 k$ o+ V; |& |! k1 F$ F- const mat = new Matrices();+ b5 W" D2 ^) d) a
- mat.translate(0, 0.5, 0);
# Z; u/ m+ s5 s4 f6 ~
1 _3 q" K# h/ |8 K5 U- function create(ctx, state, entity) {
) w8 d+ v) f5 n% u% x - let info = {
# {( _4 d# G1 l; Q, A3 S - ctx: ctx,& w8 W& z4 y( t% Z; V9 D
- isTrain: false,
/ Z) e. L# o: k; p$ L9 {3 d - matrices: [mat],
: D7 c+ |6 p* F9 z B- q - texture: [400, 400],
, @- |5 u. G* n3 M3 t- J7 o) Z( a - model: {- g+ ?. G0 G2 Z% h( A' E3 V/ K
- renderType: "light",1 |' U8 c. s L9 ?2 B! T% l5 N. L
- size: [1, 1],
@8 ^1 ~2 ~- B# i! d" j7 x - uvSize: [1, 1]. k4 G; g: T) `) A$ n
- }
. w5 E. h/ i. L& A- ~- Z3 ~" e* c - }- j3 M) }! U; s# W9 N5 q! ]0 H
- let f = new Face(info);
9 K" |8 K. A" n& @) W& r - state.f = f;5 J& P: w9 g7 c' ?& u4 \, v0 {
0 ?& u2 ~1 D X; F8 [; v; N- let t = f.texture;
& k' {! a; ^" g: U4 Z: A0 T - let g = t.graphics;) k+ a3 k3 d/ W' b; R( p( g# K
- state.running = true;
; x, R' s$ k* t - let fps = 24;
+ P6 {# F' c, q9 {( b: R2 K" [1 R - da(g);//绘制底图
- w% J1 A- r# N. F2 b4 M - t.upload();
$ a( G9 Z0 c) M5 R- n - let k = 0;
: m7 M0 v, n( D - let ti = Date.now();- _$ y+ W8 o' I
- let rt = 0;
7 J- C2 M1 N6 m# U - smooth = (k, v) => {// 平滑变化
# i* Y9 h- w* L$ y0 H9 O$ u - if (v > k) return k;
_+ p& N/ C- V% F - if (k < 0) return 0;0 \4 l1 k+ l) C2 c, e9 @/ u
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
8 q: S+ ]! G% Y* _# U1 z - }- T; i, y, _, _2 w% F5 ?
- run = () => {// 新线程6 j8 G8 q$ K$ L3 A2 V- t
- let id = Thread.currentThread().getId();
5 I: F9 O* o! [ E# Y9 e) V - print("Thread start:" + id);
( U/ u5 P7 g' Q: A$ v$ T- N - while (state.running) {9 E9 [2 |) G) v: p
- try {
$ B8 o' L* ^9 ?3 R8 z. g9 l4 L - k += (Date.now() - ti) / 1000 * 0.2; s$ h$ h" o, l
- ti = Date.now();; \) @0 O3 a4 X% N( A, }
- if (k > 1.5) {5 ?9 ~4 S9 l2 o' ]
- k = 0;
. ~; [' P/ I2 e5 S U - }
& I: Z; o9 g4 F7 Q& H2 f: S1 y( k - setComp(g, 1);6 k$ A Z8 F& @- L) N" O0 L
- da(g);
% l' K1 `8 T: u% f t, Q - let kk = smooth(1, k);//平滑切换透明度
5 m, {# d9 }6 d! F: k - setComp(g, kk);3 F. ^2 o+ M2 w
- db(g);
8 ~; E3 j& n, G6 c; \ - t.upload();
: \* q# `& l3 t - ctx.setDebugInfo("rt" ,Date.now() - ti);
; n9 }6 {& s+ K6 ?# _ - ctx.setDebugInfo("k", k);. d7 P4 F, H3 `4 D. T% K
- ctx.setDebugInfo("sm", kk);
; t. k! c1 o2 b - rt = Date.now() - ti;
) _( A! I% ^, V- a& q - Thread.sleep(ck(rt - 1000 / fps));
$ p5 B* a: c# s, x0 y- L - ctx.setDebugInfo("error", 0)
* \6 x% X! I# S( j# l( ^ - } catch (e) {$ ^2 H. |" b7 l* Z( s6 ~8 q
- ctx.setDebugInfo("error", e);: T& c, ]# E5 d. i
- }
. {3 W7 @* A( q) G, H y - }
8 e. J" G! a% x, z1 a& O - print("Thread end:" + id);) i- r9 \: ]! z, ~$ c/ `+ I
- }
) |; b# i: k; }; k4 D3 O - let th = new Thread(run, "qiehuan");" N% o; J% z+ c0 b8 m P
- th.start();4 |8 h j3 E2 ]( \* M9 _8 I+ H. T9 |
- }8 Z, W1 M, w* z" m( r4 G
% r' k+ Z/ x/ o7 I; [4 u- function render(ctx, state, entity) {
4 } V4 v! W: C2 N - state.f.tick();
) ]0 Q4 s+ k. E2 T9 K - }
5 J0 X# ~, C. r. m/ K - 9 {& u; E( I! p6 ~1 U8 |" i
- function dispose(ctx, state, entity) {1 p0 ]! \$ L* B; J5 R& o9 n, O' K
- print("Dispose");
; p& v% b# x# ^' ^2 Q/ u* Q - state.running = false;5 K$ K% @& P! H$ J1 {8 J
- state.f.close();) R- ]" c u0 y
- }
4 u. H# z x6 {8 u* j- u1 x
3 h$ J0 a: [" C; D- [' X- function setComp(g, value) {0 ~' P- i! @; }1 a' u0 j2 M! I
- g.setComposite(AlphaComposite.SrcOver.derive(value));
+ a, d3 T4 U( a, Y8 ?1 b - }
复制代码
, q* k6 V7 K! D6 V( n, c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。 W9 L( |. g* H. Z
3 y2 P9 t; `- e% j$ o
9 ?7 O% J( o) v8 V' ^! ^! V( J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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