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4 @; A* y7 M# T2 N' a! U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 Y% I6 ]; x/ A
- importPackage (java.lang);* Y1 Q3 h, I: O3 g
- importPackage (java.awt);
" ^' h( N. a. m3 z7 G& [/ a, \ - 8 U! b4 G3 \: c3 g% `+ V/ \+ h
- include(Resources.id("mtrsteamloco:library/code/face.js"));
# c2 X! g" J4 R# Z: F y! |- c( \ - * s( _: y! W: p
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);) ^' b: Q# L, \4 M9 N) Z$ D' F
( W; _4 X$ N3 Q1 M# ?6 F- function getW(str, font) {. J( K: R& l. v
- let frc = Resources.getFontRenderContext();( y" X& C1 o' N7 @% {/ V/ Z3 N
- bounds = font.getStringBounds(str, frc);' u2 L, Q8 I0 g2 z2 K9 @
- return Math.ceil(bounds.getWidth());$ J0 x4 p ]0 y
- }) S! z8 h6 l1 y& `. S- W; q
- ' v( t# N, W# L0 Y/ v
- da = (g) => {//底图绘制
8 O" v0 o! d: K) N n l - g.setColor(Color.BLACK);& N9 _- W H) _8 p" d0 \1 o2 g, L
- g.fillRect(0, 0, 400, 400);
- {$ V, N* I( b; y K# n - }7 C+ Y w6 |+ ~# H, i* o' q2 L
7 Q. P6 l5 V' D! X4 \- db = (g) => {//上层绘制
3 {+ T8 S3 _1 x - g.setColor(Color.WHITE);
8 a @7 T9 p6 z - g.fillRect(0, 0, 400, 400);9 W; l, e% p; A
- g.setColor(Color.RED);0 J3 c( |7 k& |( S6 n; z& d. x
- g.setFont(font0);5 T D) j4 w& N; s3 R r
- let str = "晴纱是男娘";5 m3 }. k4 z' V% U4 V! a) P: Z R
- let ww = 400;
# |' x9 _$ K; T' c- v1 M% }/ V* F - let w = getW(str, font0);$ G0 S! t2 r: F) `# I) x. ^0 `" a
- g.drawString(str, ww / 2 - w / 2, 200);
+ Y: t+ d R" g, b3 h - }. O: |" t M7 I& }
- . U2 p* w0 M4 Y1 {$ {1 E
- const mat = new Matrices();
$ C5 J* {& M% w+ _7 k - mat.translate(0, 0.5, 0);5 x2 \# \# c9 \ W' D: t
- . a, t) N: Q& j9 r$ l, [
- function create(ctx, state, entity) {
" H" r$ P3 n. U# r' F- I# i - let info = {- C. k9 |) m ?5 m' \6 b+ P: |
- ctx: ctx,( j. f8 h1 u* k# ^
- isTrain: false,: D+ {+ ]7 R/ K, |/ E1 [' H
- matrices: [mat],3 u6 h. `5 i- B; P9 n& [+ F
- texture: [400, 400],$ P3 A2 P" i, w% I5 @
- model: {! m0 S& ^& f' Y' H" |
- renderType: "light",8 i" r" B+ ^: B# j# t
- size: [1, 1],
0 D" [6 z" \# m( _5 L3 k* S - uvSize: [1, 1]; ? @* x4 E& l6 I
- }
/ K) K& F% |! F/ j - }
; r! l. N: x" _- H" v - let f = new Face(info);
7 x \4 b" j$ w) j - state.f = f;
, y, Z* T, j5 f
$ d. d1 {) M+ }6 u2 m! _/ g- let t = f.texture;
" e! C3 R- {+ z7 j - let g = t.graphics;3 d ~5 u! o8 `6 v3 C
- state.running = true;& ~* P4 t Q {3 c0 y7 Q# I/ e
- let fps = 24;
. m; a7 N6 ~0 e' O: h - da(g);//绘制底图
" D" u3 S3 v( b - t.upload();
. G$ c8 Q* ^. W8 j - let k = 0;
! i7 J7 Z6 \( C5 g8 V" f - let ti = Date.now();3 k" e8 D& J( G* a5 b$ f
- let rt = 0;
7 j$ p; Y6 V( r" P - smooth = (k, v) => {// 平滑变化% w+ m2 i/ k5 r8 ]! X3 s( g
- if (v > k) return k;6 A* V; |% m7 h( p2 z# q& @1 Y4 X
- if (k < 0) return 0;
0 @4 |- g, U; C/ v9 g2 H - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 ?, U4 K6 X, {1 G0 J/ x. ?" a - }
z$ z. T N" u Q - run = () => {// 新线程3 z9 V( Y) c9 y! y2 G% n( ] B* D) i' j
- let id = Thread.currentThread().getId();: W* w# T- y9 }
- print("Thread start:" + id);
% J! {. k6 ~9 b7 u# R* m: D# j/ ] - while (state.running) {
# @# G& `" |$ n1 j7 ~( h/ X - try {' Y0 f2 c% U0 Q4 o4 v: O7 R. E
- k += (Date.now() - ti) / 1000 * 0.2;
7 O' J( n# G# w5 h( p - ti = Date.now();
2 m5 y# p2 I! w* N+ ] - if (k > 1.5) {
. z U- |! _1 `4 D8 w - k = 0;% B5 a$ x+ K$ i2 L4 H/ f4 T8 N
- }
2 x2 ?5 e! I* w1 a2 D - setComp(g, 1);/ R0 q6 H9 U3 g& z
- da(g);
. ~8 G" Y0 L- F" u9 X( x - let kk = smooth(1, k);//平滑切换透明度
. n* X0 y* X3 P7 P5 j9 F7 V2 t" h - setComp(g, kk);' s( J/ @5 h2 n6 \) Q$ g
- db(g);) z" f9 a. R8 v- o
- t.upload();
' p* a9 r o- J6 d$ P* Y- e - ctx.setDebugInfo("rt" ,Date.now() - ti);
+ _6 X- T4 I) i; A3 q - ctx.setDebugInfo("k", k);" z ]! _5 j- X' Y3 D
- ctx.setDebugInfo("sm", kk);* c0 ~3 q: T2 g" F7 E
- rt = Date.now() - ti;! e+ y8 P5 R* Q5 ^( W- Q: }
- Thread.sleep(ck(rt - 1000 / fps));
' V* M! P/ S w* E5 b1 r$ b - ctx.setDebugInfo("error", 0): A5 z/ e7 s; Q9 H! N% H
- } catch (e) {$ c, m- A; r0 M. ]3 J
- ctx.setDebugInfo("error", e);$ W7 u, D9 N! v2 w [& g% ]
- }& L3 R |& L5 i8 ?3 c# s
- }4 L4 B$ u+ g. q+ u& H/ X$ Q; Q
- print("Thread end:" + id);9 r/ J$ n! v1 O
- }
& o3 I! Q8 R( c* {/ u4 o+ i - let th = new Thread(run, "qiehuan");2 ~* Q. L! L! Y: C; [
- th.start();
% C: b+ ]$ k. p3 T7 L- _ - }. G9 ?7 Z8 S( f: {( T
- 9 ^( D" g; z9 V( [
- function render(ctx, state, entity) {
* t8 ]& C9 v! W2 ^ - state.f.tick(); g* s! X: e' [
- }5 c/ Z. c+ M) y! u; [1 L9 K5 m! ^4 ]
- 0 j ]9 P" T5 Q8 S6 e8 U
- function dispose(ctx, state, entity) {
0 A" W7 L" |0 U# M' g: f/ p- \$ A - print("Dispose");& R7 F0 ~/ R# }6 @4 z
- state.running = false;
0 l0 n7 _/ ?2 Z - state.f.close();/ d- Q3 K8 a; G/ S, C
- }8 k0 P3 J1 d. i0 W k, f& x
- ' \/ |+ M" p; h. `6 @1 A
- function setComp(g, value) {
" F7 N& @# y/ ` N# s1 m - g.setComposite(AlphaComposite.SrcOver.derive(value));
! g# }) |7 m& j5 [( e1 @) F: ~ - }
复制代码
/ w) J$ N2 f+ T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。' d) B2 y# m5 X+ u) e/ _
/ G2 ]5 d1 a0 a, W/ G9 A+ J$ w
7 }* Y0 F$ b( \: q4 K顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)0 W8 H* J7 c6 [. y/ L2 _. G
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