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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。% \8 |$ {; d3 w& _
- importPackage (java.lang);
& `! x# V: H M - importPackage (java.awt);% ]1 }" H* T5 A& q2 _: W0 e
* y9 H; F& X$ n5 r" |5 o- include(Resources.id("mtrsteamloco:library/code/face.js"));
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4 c- i6 v2 D+ ~1 m. h- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
/ r0 }3 h3 Q" E
/ y1 [( m) `+ v% m* d/ m- function getW(str, font) {
/ [5 J4 n9 m! h$ B: k7 F - let frc = Resources.getFontRenderContext();
; ]8 j2 C+ M# F" }3 R9 N! C - bounds = font.getStringBounds(str, frc);
0 M8 f3 a1 P. O - return Math.ceil(bounds.getWidth());
5 Q$ n5 F; j/ P. o - }
/ s! @5 x. N8 _9 l7 H
* P1 K5 H$ h4 [4 b- da = (g) => {//底图绘制' Y* T5 R9 ]* q5 ]& U
- g.setColor(Color.BLACK);
: d. H8 t5 b) ?+ Y - g.fillRect(0, 0, 400, 400);$ Q! c, d! `2 E2 \! d1 z; G
- }: l# p2 Y7 v0 ~5 P% T: @+ x0 X. r6 f
- 8 r9 t; c/ k9 T3 [
- db = (g) => {//上层绘制
5 U& C; b: I2 v, L+ t, j - g.setColor(Color.WHITE);
4 z& P( u1 B8 q1 c) _- T4 m4 s - g.fillRect(0, 0, 400, 400);
& @: S7 a0 H2 i N - g.setColor(Color.RED);5 j- g( L) Q; N7 P/ F7 Z
- g.setFont(font0);
4 h; _6 E4 v; V! \% m3 S( m - let str = "晴纱是男娘";
' \' \ M8 w) V - let ww = 400;& O( {- p Y- X O$ P' J
- let w = getW(str, font0);- U2 R4 ~& q/ j2 G
- g.drawString(str, ww / 2 - w / 2, 200);" T$ W, K( t Z4 P7 ]6 g0 h9 {
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% R# o5 r- k. y- const mat = new Matrices();2 {8 J6 Z( }! ?9 ~0 Y' q
- mat.translate(0, 0.5, 0);
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8 y" F9 ^, w2 y- function create(ctx, state, entity) {- ?7 V) ]# A; a; `4 k+ S) j
- let info = {" ?/ `" _. |6 W
- ctx: ctx,) e( X" j" d% \
- isTrain: false,- X/ c8 Z+ [& ~
- matrices: [mat],+ v; [+ H' ]/ d. S$ v8 C
- texture: [400, 400],% b* ?* | S3 z5 z, t6 \! A
- model: {
+ m6 u$ h- K/ [1 y - renderType: "light",/ H2 e! n \5 U$ x
- size: [1, 1],
! u; {/ A+ |$ R K+ ?% k7 L2 i - uvSize: [1, 1]+ W: h6 v* P6 n* r
- }) v7 \/ M$ H' f6 u, A; v
- }
# H" R- q1 B) k8 q' v - let f = new Face(info);& C3 o3 [+ @1 ^8 w
- state.f = f;/ f7 j' M. G) ~1 ], ~
- 1 D: |7 V' g: o! T+ @4 ~; I- Z3 l
- let t = f.texture;
! m. i' J. |- t& Z* a a# M - let g = t.graphics;/ y& L$ u+ v- l P+ b% b
- state.running = true;6 e1 n7 g! k0 q1 J! f# C
- let fps = 24;
; }, R k* o& U, G- } - da(g);//绘制底图
' n! n! D# A* f* q8 m" _% J2 L - t.upload();
7 j; D( [7 ]7 O% L - let k = 0;
. l! t5 T( L! |+ {/ `0 C - let ti = Date.now();
% {0 @4 s% D" F- N8 A- H5 h6 ^ - let rt = 0;5 r" B5 S& c; L2 x/ ^ x5 ?
- smooth = (k, v) => {// 平滑变化( f" Z' ^# g6 H P- y ]
- if (v > k) return k;
- V4 D- B& Z3 M - if (k < 0) return 0;2 n/ @& S( f; N- t1 Y
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;# M* J* w, c4 ]! P9 W
- }
( r. `5 H& z% r+ P( c1 K - run = () => {// 新线程
+ E# v, E4 j+ l - let id = Thread.currentThread().getId();5 K" d. y- G3 V; N
- print("Thread start:" + id);
7 g! u! B9 f. y- e: R3 d - while (state.running) {8 D# S _, L& F: G0 T; b
- try {
# o& T) ?2 C p - k += (Date.now() - ti) / 1000 * 0.2;6 a$ D* @6 ~( k1 f; z
- ti = Date.now();: J, d& _" Y7 q4 f$ A# i
- if (k > 1.5) {
6 `/ v1 A* z& S7 D6 c - k = 0;: | P6 R! O# {+ B
- }
" p' K6 q) ^% l3 P9 ^( @ - setComp(g, 1);
: {, O, Q V2 y5 O& u* Y - da(g);: k" Y- K) n9 o' ?6 b, e0 k% Q: k# V
- let kk = smooth(1, k);//平滑切换透明度
9 J( s0 F! Y( J& G, T. N - setComp(g, kk);; j# v( _3 J) n/ I* \
- db(g);
3 r* k2 k0 i1 H! q1 |1 Q2 {' D' H - t.upload();
" q" e: { J. `/ F$ X& k- } - ctx.setDebugInfo("rt" ,Date.now() - ti);6 d6 f6 @7 U5 h/ z: }8 [
- ctx.setDebugInfo("k", k);9 v- L( K. o" s/ P* e
- ctx.setDebugInfo("sm", kk);$ `* J6 H2 \. k% k- q* [% s7 S
- rt = Date.now() - ti;6 \' k& B( x6 T9 L$ s) [2 K
- Thread.sleep(ck(rt - 1000 / fps));7 p/ t2 F' s8 v* p3 t1 y
- ctx.setDebugInfo("error", 0)
9 Y! F* x8 h) N+ n# r7 t - } catch (e) {* o, G8 u( o6 q' p* [) k5 w
- ctx.setDebugInfo("error", e);! W; ?$ v; p) T3 u) Q3 b! B- S
- }. N9 I5 b W, T
- }! H" n2 f. I: J3 c
- print("Thread end:" + id);! `) J, p/ `0 x. u5 m
- }
, q% e6 w" u& L* Q6 f - let th = new Thread(run, "qiehuan");8 L1 F p$ F) X# G/ g
- th.start();
2 g! ^6 f* k- e - }4 \& n4 ~% y$ U2 C, t
) E, g1 ~5 J% U7 L, T$ N- function render(ctx, state, entity) {
4 G, \" e9 ]0 R5 m7 L - state.f.tick();
/ N5 p& Z" t% w) m V8 m9 b - }' G5 n& y2 g8 O5 U( Z
- 0 [& \) P& Z- F! r$ T1 q
- function dispose(ctx, state, entity) {
0 {" ?8 e3 t6 v- B7 d6 Y' D - print("Dispose");; K6 r5 o. s9 l# r
- state.running = false;
- P! Z- X& X3 }' i" i. ?' C3 ? - state.f.close();
' v9 c; F# a( I- K. h - } F' s% X }/ [
" W5 u1 N, T9 n o! j- function setComp(g, value) {
& B- G; K& D- g Z7 L' p( z - g.setComposite(AlphaComposite.SrcOver.derive(value));2 E$ o$ v) v3 b" s: g6 s
- }
复制代码 8 |+ m. a$ |0 [5 m: 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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c7 M% p) W2 h: A9 l顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)" O: V$ d1 h/ X$ X1 R, `/ x7 a. P7 M
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