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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。
; Z4 P# p C* i' }* t# [4 |- importPackage (java.lang);6 [5 d& i5 M: o" F U: t
- importPackage (java.awt);
& { n$ N) H# E) e% U- V6 i7 J - # [2 J% b3 | k8 {- b4 g, B7 O6 Y
- include(Resources.id("mtrsteamloco:library/code/face.js"));9 V' l( W& n! i" v0 S5 Z
- : G) G# R( V) ~: F& ?! y
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
1 T( A. L v4 R& X# u8 {9 E
! u7 p6 h+ ?8 N0 @+ o& g5 L- function getW(str, font) {5 U) ]1 q( |" I* p
- let frc = Resources.getFontRenderContext();
2 _6 x9 v/ i) G6 e4 _* f0 N, A - bounds = font.getStringBounds(str, frc);
% i6 h% `4 h7 ]* y6 _+ y - return Math.ceil(bounds.getWidth());
3 y3 U" H; _4 ]; Z k - }
6 y* D# C" _1 o; w8 T# m s - 0 E- J* e' c! F$ L6 v
- da = (g) => {//底图绘制
: W- b# [9 ~: ^. I* B+ T - g.setColor(Color.BLACK);; c( S& c+ ?! _) d8 {1 Z. p
- g.fillRect(0, 0, 400, 400);
6 i7 F7 V0 m3 U& F+ N - }
( D8 U1 W! J! A! f# s& | - 9 ? A6 p$ g r6 z0 O9 f' ?* X' S
- db = (g) => {//上层绘制
' P" S) I: r# M* K2 c8 E - g.setColor(Color.WHITE); a/ v$ w* t5 m# @7 r# l b. z
- g.fillRect(0, 0, 400, 400);
4 Z# l ~- Z- O+ r9 y2 y" N( v5 J8 T - g.setColor(Color.RED);
# R! l5 D* S7 a - g.setFont(font0);
4 c) y% n. U3 @8 W; o9 w$ S - let str = "晴纱是男娘";' h8 v# k S: F
- let ww = 400;
2 [, D3 I& p8 q5 b0 s - let w = getW(str, font0);- p, ~: R, L% x) y3 X8 p
- g.drawString(str, ww / 2 - w / 2, 200);# V7 Y6 l8 t/ j' a' R, G1 d ~2 T
- }. R( G( |, [) k% s8 w) g
0 n) x- ]1 O' s' ` {- const mat = new Matrices();3 b3 p5 v& U! P+ ?4 u& W. @
- mat.translate(0, 0.5, 0);& _0 w) b2 P) u, N7 m7 U, z+ y! _
" E+ j# E$ S/ s& t- b' `- function create(ctx, state, entity) {: @% U% U5 z4 p/ y h
- let info = {
+ T# o6 x9 R5 T7 T - ctx: ctx,2 y" X; N4 S9 @- y& f
- isTrain: false,7 r5 `4 _9 D4 e. c9 F! Y
- matrices: [mat],6 o- s- ?% ]& Z; G' ?: h! Z) B3 W
- texture: [400, 400],7 x/ l' \. k, x! F l, ?
- model: {
+ Z: j- H( y# q! w - renderType: "light",
]& F* q' h3 y" \3 A+ u - size: [1, 1],# Z2 p9 w6 k0 Q2 ]( P
- uvSize: [1, 1]
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- }
, @0 L$ k0 [) \, L; Q3 _" I4 U" K - let f = new Face(info);
4 `5 j8 {* P2 r# s- A6 c1 Q1 ]* f - state.f = f;8 K6 b: W/ V6 U6 Q; y$ E
/ l/ H% N% D7 \1 x$ G5 A; {0 w. q- let t = f.texture;4 G3 [2 h3 P- b* D" I/ Z& N/ E8 ?
- let g = t.graphics;1 H' c- R) N+ V
- state.running = true;
3 Z, U$ c1 x$ d$ _, s$ v - let fps = 24;0 }! u/ _6 `* c! F$ r' V( }; [$ S
- da(g);//绘制底图4 ~' ^- _' t" M( s U! w
- t.upload();2 e1 q. ?" i4 h- v1 F
- let k = 0;2 t! U) g0 ]* b! o6 {( x2 z4 h
- let ti = Date.now();' k. Q' E; g" w) H7 T
- let rt = 0;
. X q# @+ o' j6 T/ ^; M- i - smooth = (k, v) => {// 平滑变化4 p1 W! k( ?0 y5 v1 k0 s" E# |% q7 Y
- if (v > k) return k;
: H8 T' p- Z5 P( H' }% |$ s- i$ E - if (k < 0) return 0;
( i% B6 z/ L5 J+ {# P - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: u1 C5 ~. l8 k4 K3 u% Y
- }. ~* X8 \2 i( v4 }- P2 S
- run = () => {// 新线程
$ i" s8 w0 S4 ?( L" _ - let id = Thread.currentThread().getId();7 U F6 H, W: s" Z# I
- print("Thread start:" + id);8 P9 d; s( C+ N$ V1 d+ a! V* V
- while (state.running) {
) s% v& f+ U0 A1 J2 r- u - try {5 j6 |9 g; s4 X- k: m4 B
- k += (Date.now() - ti) / 1000 * 0.2;
1 S2 g0 G& E" z$ W7 |) N - ti = Date.now();
6 H% Q a T7 ^3 s9 L& \) E - if (k > 1.5) {
5 e8 E4 K2 G" ~- l! s( m - k = 0;
' ~3 n( p) W9 x G - }
/ Z- }. ^/ M$ o" k, R. a - setComp(g, 1);
% f" w0 b6 h% e" U - da(g);
8 F1 N, W* {& y% w8 K9 F$ L u - let kk = smooth(1, k);//平滑切换透明度7 E% a: N2 m1 d& _- m% A
- setComp(g, kk);
+ U* e, }2 E3 V. q9 _( f! L0 g. {, ~ - db(g);
- P9 r; @: O; l9 H - t.upload();& m1 A- m0 r6 \" W/ d* g
- ctx.setDebugInfo("rt" ,Date.now() - ti);
+ |; R+ {# Y7 O( N8 r - ctx.setDebugInfo("k", k);2 C) ~. E! r8 H m& n
- ctx.setDebugInfo("sm", kk);
& K9 F* A4 E; _) w+ r+ J - rt = Date.now() - ti;( t' N2 q. W7 O* @6 A6 V/ D
- Thread.sleep(ck(rt - 1000 / fps));
6 G6 b6 T# d; p" ? - ctx.setDebugInfo("error", 0)
, p) S+ X U; m) `' a3 a - } catch (e) {
& d# z2 E; @( c/ X; j6 K3 ~ - ctx.setDebugInfo("error", e);
/ g. {/ R0 f+ A r2 o* d! |. R - }
2 T* j, ]$ H( n2 q8 _9 L - }
" e2 Y/ p' }- z6 g1 R% \ - print("Thread end:" + id); X/ p, I- z) K" @# Z0 i7 v0 t
- }
' M# O" c# b: |. ~) ]& r - let th = new Thread(run, "qiehuan");1 c5 c) p9 Y: [ Y: e+ _6 a
- th.start();. ^$ V5 g( l- ~4 ]+ Q% Q
- }
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/ R; i7 q8 k; S8 J/ ~6 i% a- function render(ctx, state, entity) {/ X0 I' n% ^5 h$ Q: J0 G7 L+ K! k
- state.f.tick();
K) p6 Y0 S& S# S3 O; _$ v* M - }+ w8 D* Q, M; A- b% U. i
- ) [, e' W2 ]$ C
- function dispose(ctx, state, entity) {$ E( ], [! t9 N) d( r
- print("Dispose");
2 k; T! V( Y7 D0 v$ \6 b: m - state.running = false;, ]# T5 Y7 Y5 @0 U* u4 }; y
- state.f.close();
& ~" Y" a5 `/ O0 Z# G7 I% G - }
$ Z7 w8 X" c) W8 F! G; n3 J$ z+ g
- ^( B1 l3 Y5 Z/ H# |: Q# S- function setComp(g, value) {4 W& M9 x. f+ F5 j) ?7 a
- g.setComposite(AlphaComposite.SrcOver.derive(value));/ |5 Q$ n" D5 }! @9 I
- }
复制代码
" `1 j ?4 \8 ]- z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。* q8 S0 f: W5 O2 k
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% ?& k* B1 R+ b" B顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)$ \; j2 `$ @% J. L7 A& ]
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