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% ?6 K1 j! O, k( Z6 C; W" q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。
' m* g0 G' W) n, x) g- importPackage (java.lang);
% ^) A, G1 w: } - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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2 j; B$ ?1 k& P4 g$ X" t- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ Z/ F& O% a. L
- : \$ s, n, A6 \
- function getW(str, font) {
$ j: Z8 W; k1 {/ z: v: k* P/ K {5 B - let frc = Resources.getFontRenderContext();, q0 _4 H- v0 _+ H( \; U
- bounds = font.getStringBounds(str, frc);
0 n, p z' x2 e- p3 e. @ - return Math.ceil(bounds.getWidth());% g2 l. R& B2 \/ g" ]/ q5 G
- }* j. m% f& E* P# R; O( y. h
- * D7 n9 Z/ B1 w7 e6 j4 ~
- da = (g) => {//底图绘制9 g/ d. H W5 X) Y8 l l
- g.setColor(Color.BLACK);* s* ^1 r$ h5 W7 Q% H7 u
- g.fillRect(0, 0, 400, 400);- F4 Z+ ?$ V2 y/ Z$ r) s2 a
- }1 W. Q. Z0 Y3 H& N) H3 ^* T5 t
- $ j+ B, ^( G1 t
- db = (g) => {//上层绘制! H& v* N2 _" H% J
- g.setColor(Color.WHITE);; t$ H; E9 `2 s) \6 H, P! _" q; h
- g.fillRect(0, 0, 400, 400);; g" B& g0 [4 b9 ]
- g.setColor(Color.RED);
8 m, ]8 |0 h2 x% a - g.setFont(font0);6 h' |, N: W6 m6 z2 i
- let str = "晴纱是男娘";4 e+ X3 |; |$ ^" U- p; S
- let ww = 400;
; Y$ [6 i& j$ j; V - let w = getW(str, font0);
# @3 S- c$ u* B2 u9 R9 ^7 \$ A/ n - g.drawString(str, ww / 2 - w / 2, 200);
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1 {( h3 C. w6 i4 k# I- s6 x- const mat = new Matrices();
& A5 E4 O2 ~" \3 i; K+ N - mat.translate(0, 0.5, 0);
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/ k b- b- I. d/ B1 a5 ]- function create(ctx, state, entity) {
5 E8 a6 [: D p7 u6 u7 _ - let info = {
) U% q% _3 t* T6 [+ i8 Z: h" Z7 G% q. s - ctx: ctx, r9 |; m! a$ g7 d
- isTrain: false,
6 ~% S4 o3 } D - matrices: [mat],% \' l/ ~$ f$ Q- Z
- texture: [400, 400],1 B; T2 |$ V: ^/ C
- model: {
$ Z5 n% s$ l- b5 n! v/ ~1 } - renderType: "light",
, |( m) v* `" H9 @ - size: [1, 1], m$ ^8 X4 F3 y
- uvSize: [1, 1]
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- }; E$ k1 v# R5 k, Q3 U. r
- let f = new Face(info);
% R" o, s- W) n$ Q5 G - state.f = f;5 R( N/ S% m) p/ y& z. w
- 3 W- @+ b' t! H! R0 R
- let t = f.texture;
+ D& x7 o7 v# v% y; U- l - let g = t.graphics;
7 e. I% G" k, ]) T- ^% S - state.running = true;) r" c: |+ g- T, `: ^/ @0 z9 Q* c
- let fps = 24;
; X+ ~+ ?- ]# R t - da(g);//绘制底图7 M+ e3 t9 {4 r6 d0 \' |
- t.upload();
0 U9 d3 Y4 i4 B; ?3 H0 h - let k = 0;# \5 t6 V1 d( O" _. e$ J
- let ti = Date.now();
y) H0 B# h! @' \! V - let rt = 0;
; C, X" n( c9 f - smooth = (k, v) => {// 平滑变化5 L q1 S% B7 C8 o4 {+ c
- if (v > k) return k;5 ^+ T! V& z) A& Z; W! ]7 k2 X
- if (k < 0) return 0;9 }; o0 g! b& x: b2 w
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
7 m% l* @% j& }- M. Z - let id = Thread.currentThread().getId();
1 @6 Y; N# v* U7 }, @ - print("Thread start:" + id);
% ^+ q& k- m4 W6 Z - while (state.running) {
1 W, Y8 p+ _8 U0 d! o0 V. K - try {) i$ m% h9 o) x; K% l; o. n
- k += (Date.now() - ti) / 1000 * 0.2;4 b, p6 b5 q' P5 T5 I
- ti = Date.now();; m2 e2 K# @) s' j2 v
- if (k > 1.5) {' j! q6 [8 C. H1 q0 y/ _
- k = 0;
2 v6 ^ l* W6 s- B+ C! a2 c9 I2 M - }, A8 C0 ^9 q9 n
- setComp(g, 1);8 _" w% f0 K$ Q$ m& n3 {
- da(g);6 {+ s) e$ N0 _: \( ?# @
- let kk = smooth(1, k);//平滑切换透明度7 W v% U/ }+ D* o
- setComp(g, kk);
, J7 m9 j% v! x% A, V8 O - db(g);+ g( j4 x1 h1 i [, u
- t.upload();8 G# k! Q2 Z* u1 L- V$ M
- ctx.setDebugInfo("rt" ,Date.now() - ti);
) H5 O5 \8 g+ W$ V0 w$ ^ - ctx.setDebugInfo("k", k);
; C. I9 T+ Z# I4 { - ctx.setDebugInfo("sm", kk);$ |7 i0 Q: U$ O+ j. t
- rt = Date.now() - ti;
7 u9 y& ]8 J! h+ p( ?3 V - Thread.sleep(ck(rt - 1000 / fps));
) z& X' x7 Q* ~9 v6 M7 h0 P0 w - ctx.setDebugInfo("error", 0)) [+ l' a7 X( J7 Z
- } catch (e) {
i4 L2 C$ z6 L - ctx.setDebugInfo("error", e);8 V3 h6 e# V2 Z3 H/ ?2 A( a
- }1 K n3 U" Q; q% E8 j( p: m
- }
9 D: |& `, Q9 r/ [' K - print("Thread end:" + id);
- F$ }# i. I e& C+ B - }
- i0 f. I# l9 l H# P - let th = new Thread(run, "qiehuan");* y! k4 i9 d+ s3 S. G
- th.start();
# M5 p5 C: p9 x7 J1 Y - }
2 Q- I$ P) [6 j b+ I& Z - 0 m/ P9 ^5 s5 A! s. ^
- function render(ctx, state, entity) {
. I2 \, x# s: c. p - state.f.tick();
8 j# C8 w* K' L - } L, ~4 q, G2 f' H% s0 N3 k
* \0 I P4 p9 `" v- function dispose(ctx, state, entity) {
3 K: E7 w# [) E4 a7 h3 E. g5 r - print("Dispose");
0 \1 d- v& [2 ?# t0 Y* P8 ~ - state.running = false;
2 g' a% P0 a H2 U - state.f.close();4 b) a$ L# N R+ N* r
- }
" j0 I# h. c) `1 L2 |( M - $ }. ?$ u- f+ l! o! A! h
- function setComp(g, value) {
/ {8 I! Z) g7 V0 _ - g.setComposite(AlphaComposite.SrcOver.derive(value));
' W. t. l4 y' b! ~, V: Y; X - }
复制代码 4 R5 V. N' U, v# M
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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+ R) ~0 ~$ ?0 k9 Y4 {* Q% |
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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