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# n7 ]0 M8 P5 y3 F, g/ y4 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。
0 \7 D# J( [4 ?+ g- importPackage (java.lang);4 N' R$ S& f s# L- `& T$ }4 K
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);- i' _- E+ j6 Z! e/ A# D
3 s% ~: W# d, B( }0 o- function getW(str, font) {
, v6 y& ?% v j - let frc = Resources.getFontRenderContext();
3 F9 g, Z6 l4 q& @& m: V8 d4 t - bounds = font.getStringBounds(str, frc);
! B# E. t4 w( l. A - return Math.ceil(bounds.getWidth());- P( B3 u. h/ V3 L+ {: J% E1 y& l
- }$ C; F, f3 h6 u- T8 N
- : O2 W8 Z" x. T
- da = (g) => {//底图绘制
* U0 T9 z# Q: T6 C, H( ^+ F - g.setColor(Color.BLACK);$ t5 S( |1 A3 c) l
- g.fillRect(0, 0, 400, 400);
2 q/ \0 C4 m) x2 R$ Y - }: T! I/ o: ?3 |3 V8 u
- 4 U3 M! S8 W8 k& i. Q- L
- db = (g) => {//上层绘制
. @) S8 H/ v/ p- G: r5 H - g.setColor(Color.WHITE);
* j: y5 j0 V7 u - g.fillRect(0, 0, 400, 400);
* t5 M! @1 h8 {6 A - g.setColor(Color.RED);; f& D9 J; p; T, `) \5 I- T0 ]
- g.setFont(font0);( D' z U2 M! a$ Z) Z# c: c5 c
- let str = "晴纱是男娘";9 X& v5 p2 p/ _# N, \% K
- let ww = 400;
?+ I* a) r0 W' N4 C" H - let w = getW(str, font0);
1 T5 x, Q1 r# a- A8 k - g.drawString(str, ww / 2 - w / 2, 200);) B5 ?& u! b) K) ?5 `6 _8 Y) T
- }
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- const mat = new Matrices();
4 ?6 K K& W2 @2 H! o& @+ ? - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
/ G4 V9 A; H1 F! Y - let info = {
3 |! _$ t. J& }/ @# ] - ctx: ctx,/ v/ K( F: o) F) g+ {; j8 {
- isTrain: false,1 |9 E* J( y/ M) y+ d
- matrices: [mat],' l% p* S6 U/ |8 o( P$ @$ x9 g r
- texture: [400, 400],9 b: h& {- [0 \- A, l
- model: {
& k9 I6 }3 p1 M6 z$ q - renderType: "light",
3 M$ g% |) M% U- B% l% @ - size: [1, 1],
( q" f3 N* W0 t1 H7 l5 k - uvSize: [1, 1]8 N' w# }/ g! r' o# K. s
- }6 S- z$ Y! v) r! z) y
- }/ \$ G+ o/ A. m
- let f = new Face(info);
2 H, U8 g& V, F( b ]% W& F - state.f = f;# K2 T0 D( r4 R1 w
5 z. ~' a3 B* v* q- let t = f.texture;
, q: M% I- P3 B1 V - let g = t.graphics;0 Z# A: ~$ f# {1 W
- state.running = true;0 Y$ \3 P4 [* i! Q4 Y: e( G" {
- let fps = 24;+ F" M; v* i" o) b( L0 J1 U
- da(g);//绘制底图
8 r% B. ]" z3 s g! \: F) m - t.upload();* V* d; \6 q; b
- let k = 0;
. _' |: y- g! v3 r - let ti = Date.now();
- u9 i+ r; T7 R& g - let rt = 0;/ W% {6 `9 _6 j3 c
- smooth = (k, v) => {// 平滑变化. t. n- U1 ^3 c5 M, k* R7 I/ u
- if (v > k) return k;/ g+ \& ?0 z0 \! Z4 _) s, R1 C8 A
- if (k < 0) return 0;, |- A- j0 R" S" S
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 x4 V$ X+ ]3 ^ w5 p
- }
. t; _; G L0 e2 w% Y4 f - run = () => {// 新线程
+ K2 ?( U/ b j4 B0 z1 N; b - let id = Thread.currentThread().getId(); b4 r8 _* \5 Y. T1 D9 ^' @3 s5 b
- print("Thread start:" + id);
- `* x, S6 o7 E5 q6 R - while (state.running) {- s) T7 s% g' G' C' E) A" v3 \
- try {
) g3 R# \* }6 B - k += (Date.now() - ti) / 1000 * 0.2;
2 Q* F9 T- V7 [, `- X$ X, I$ A* o - ti = Date.now();9 y& Z' c w/ b o) W
- if (k > 1.5) { f4 O x: L* C- h
- k = 0;: C+ U4 L; Q* Z
- }
a5 o* q- S! | - setComp(g, 1);
6 y7 w! V5 F& Q% \! z& o/ f - da(g);. A, j" k ?! p" W* [$ V( w. e
- let kk = smooth(1, k);//平滑切换透明度
0 [* L/ ~6 m* N; H - setComp(g, kk);
/ I2 J/ K) E, c8 _$ I - db(g);7 i' T* `, R( [9 S) h
- t.upload();# ~% }( Y; T) g& k) V
- ctx.setDebugInfo("rt" ,Date.now() - ti);2 W: ?4 u( S2 d5 r7 ~$ M9 @* ^
- ctx.setDebugInfo("k", k);
) o/ y0 R1 z2 H# w - ctx.setDebugInfo("sm", kk);) N# S! {+ R" c2 [: Q$ c& M
- rt = Date.now() - ti;
$ H! t, a, T/ i - Thread.sleep(ck(rt - 1000 / fps));
- C r- ?% L3 V - ctx.setDebugInfo("error", 0)0 f# I |& b$ m. M: D# U' v
- } catch (e) {" Z- c9 ^9 K5 y0 P* Q
- ctx.setDebugInfo("error", e);
( Y( c- z8 |$ T/ X- f - }
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- print("Thread end:" + id); E. f0 t% {! A6 p
- }5 T5 ~9 }+ _0 @9 p$ c. c$ [
- let th = new Thread(run, "qiehuan");9 g* ~2 \, V z3 l1 M
- th.start();
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/ P1 ~& c3 C/ k- I. Y) k6 W# W- function render(ctx, state, entity) {$ _/ Y4 [% v; U
- state.f.tick();( S, p0 a/ P" h y+ I: q! z* g' b* B, j
- }9 T% f9 _/ i) A! ~9 D. }
n0 d, ~! b+ L, [- function dispose(ctx, state, entity) {
/ V- g, m$ @5 g5 }# b" n - print("Dispose");
4 g# E5 ~; L; |! C/ g9 ^ - state.running = false;7 B' G q4 g! ]7 q, X- m9 M
- state.f.close();
7 w1 |; t! V( L, I5 `* [ - }
- f4 Y& h) X, f. a
5 ^0 ^! x9 Z* Z$ i/ }* s! Z- function setComp(g, value) {* b6 j, S/ L. v7 ~8 l
- g.setComposite(AlphaComposite.SrcOver.derive(value));6 \) z8 I# F( _. [
- }
复制代码
* W- q/ p3 M, R' x( g4 G+ y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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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)3 N5 `( K( w. { {8 {
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