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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。- B7 C. {/ d$ N9 W$ b( a9 D
- importPackage (java.lang);/ @: J* P) H/ H6 s! c, Y. F/ v
- importPackage (java.awt);
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R# j" W* j5 F( u6 A- include(Resources.id("mtrsteamloco:library/code/face.js"));9 D- c& m: S, @) R& Y5 O) p
- 5 |& l( ]. l: o! e; S
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
$ C0 d4 V1 @% O- x9 ^9 y - 9 g; c6 F+ a7 @
- function getW(str, font) {& s5 ~" B+ W6 L6 o
- let frc = Resources.getFontRenderContext();
' Q& F' U! ^# x& l1 v1 Y4 Z - bounds = font.getStringBounds(str, frc);" i- h' z ?+ a" c5 E( c% R+ U
- return Math.ceil(bounds.getWidth());: }# ]0 G0 i6 a+ J4 q
- }+ a* ~7 l' u8 ?; R4 x7 P1 B- l; T& X
- : K# u$ o9 a9 F/ f% `* K
- da = (g) => {//底图绘制
( M3 }1 c3 T$ R$ H5 e3 I- S5 Y N/ v - g.setColor(Color.BLACK);: e5 H8 k8 m ~, b I9 E
- g.fillRect(0, 0, 400, 400);5 h/ r+ h& Z/ L' U* L9 L H1 A1 u
- }
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- db = (g) => {//上层绘制" H; A& X" Q; G5 z: l" _- ?
- g.setColor(Color.WHITE);
- U( f) Z8 I) q. D" o - g.fillRect(0, 0, 400, 400);
# J1 X; S A9 u2 _: E" S - g.setColor(Color.RED);" V* f& e. H4 r/ U! J% f* P6 Q) h
- g.setFont(font0);
# @, Z" p8 L/ L/ O! ]" v! A+ D0 Z - let str = "晴纱是男娘";
2 ]3 C- U/ R% B! b- L9 l* i6 r - let ww = 400;
) f( u2 B2 c* Z - let w = getW(str, font0);- [+ Q- v. R( Z# A
- g.drawString(str, ww / 2 - w / 2, 200);0 V: n1 I) q+ M( p3 a+ }5 s
- }
# R" s( M( Z+ A% \- {% o0 m- w - " T2 x) Z0 x2 [0 P" }" q: f
- const mat = new Matrices();9 Z! i2 W) Z- @! F; v
- mat.translate(0, 0.5, 0);! M( W% R$ ]. {' x
- $ b3 g# I( `) t6 u& D
- function create(ctx, state, entity) {
# [5 U# `, ?4 V6 g k - let info = {
9 r" B, n$ M: A6 \! U6 u2 X - ctx: ctx,6 b+ V- t1 S( h2 W
- isTrain: false,/ g! c5 g: u* q
- matrices: [mat],
4 F; I5 y/ Z1 L$ E" d s6 T - texture: [400, 400],
, Y! ^" c% B& q - model: {
/ }0 F! X2 H: @5 U" l; L L' V - renderType: "light",
% [3 |: |; @$ C2 N - size: [1, 1],
. G: G8 c1 o! c! Y: g, s$ b2 D - uvSize: [1, 1]2 q) C( A: }4 m2 M* ?
- }
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- let f = new Face(info);
+ O, P' I2 Z* P, s) b4 p6 p - state.f = f;
( s) {9 {2 H. K% t, ?9 F8 Q4 {5 ^ - 5 F; w$ V# s' N9 z3 c
- let t = f.texture;% F, y9 ~+ M) [7 U* G
- let g = t.graphics;, d2 ~4 k2 _5 f; v/ {# d2 U2 x
- state.running = true;
! ?0 T2 q7 f! Q' y. [ - let fps = 24;/ [/ d% L, }* x% A, ]
- da(g);//绘制底图
* \, B4 m2 c- }$ X - t.upload();3 p( k w+ \# ^' _0 k
- let k = 0;
( ~, o# Y, ]( C2 Z - let ti = Date.now();
, U9 j- ~) d. B, V x$ @ - let rt = 0;3 s8 `, B- s" t/ k& k
- smooth = (k, v) => {// 平滑变化
$ b Y c9 d, ^. G# \ - if (v > k) return k;0 ]4 g5 W$ Y% C L4 n2 ?
- if (k < 0) return 0;3 y4 @7 N, s& h: D6 O8 p2 \$ w
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 F& G$ g0 F) c( ? - }
1 U2 j/ o- w# {* W! B0 o, q - run = () => {// 新线程- u5 y# u" g2 A: y p2 B) D
- let id = Thread.currentThread().getId();8 Q* l; M0 F5 n0 |4 M' V
- print("Thread start:" + id);
! m; c, B8 n% u& ]- W - while (state.running) {
1 G v. J6 `: r0 n8 L& X - try {
/ O* a% x7 a3 j0 w: g+ f# v" m - k += (Date.now() - ti) / 1000 * 0.2;
) m' F: f1 g7 @8 S" \ - ti = Date.now();
0 q( d3 U/ o6 `8 m. r# ?; ]# b - if (k > 1.5) {* ~: o( K8 W0 W) I: R
- k = 0;
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- setComp(g, 1);5 R+ p3 c, \+ o2 W/ G5 p
- da(g);
3 L' d9 w0 b5 f; w9 E: w - let kk = smooth(1, k);//平滑切换透明度9 C' C% g1 b" i, q: }& G9 T; P
- setComp(g, kk);; Y5 Y. N3 b. R, a3 J. n- j: n
- db(g);' `- ?9 s& n, O+ V( H+ v
- t.upload();' C5 |+ f9 Q) w# X
- ctx.setDebugInfo("rt" ,Date.now() - ti);
0 q2 M! V5 M7 s+ q( I; I4 u4 q - ctx.setDebugInfo("k", k);
: h C; @! ]6 g9 Z1 J! O, b# K* F$ c - ctx.setDebugInfo("sm", kk);
. `/ L( v! K' \+ f - rt = Date.now() - ti;
7 d9 {% f& h% Q; t( x7 M - Thread.sleep(ck(rt - 1000 / fps));' x, Z. U' @, |3 m
- ctx.setDebugInfo("error", 0)
# z; {5 \1 p3 V" Y) A1 A7 H - } catch (e) {
* t+ g* E1 D. N5 Q - ctx.setDebugInfo("error", e);
! R& V. N) h& h - }
: A" ]7 m% M) P, w - }
* T* T" ]# X4 T6 J - print("Thread end:" + id);
* S3 A9 J" V: y4 r9 s# t' \4 n6 |$ _ - }9 h0 r5 i7 ` E+ t0 l
- let th = new Thread(run, "qiehuan");+ Z" R0 S+ W8 {
- th.start();
$ {; J" }% {8 q8 y$ m% U) r9 M - }; M( H* O$ @ R
+ p B7 N4 ^; l5 n: W5 K F/ _- function render(ctx, state, entity) {
/ U- v. f( f6 |; i! K! t/ N - state.f.tick();
, O& e- j& ~8 S6 T8 B \( L - }
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- function dispose(ctx, state, entity) {& a1 H' }0 l" F5 @
- print("Dispose");* M3 e, w* ?; E( ?! v+ B/ g
- state.running = false;
+ Y) @* S" Y! _9 H - state.f.close();
* L" A; E0 l6 m4 `7 g - }
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& _! [) ]% B6 T+ H- function setComp(g, value) {
5 |. l$ q" I7 v - g.setComposite(AlphaComposite.SrcOver.derive(value));
# H5 I$ w7 T/ p1 ~1 X - }
复制代码
5 [4 a. q8 X+ s% o+ R$ V3 m" P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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2 |0 B- h; `3 Q: l$ I顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)6 U- n% b# b, ?, K& H) W
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