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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。
) m! H% r% E( i$ H+ q% H) x; U( b3 y2 ]/ X- importPackage (java.lang);8 \, ~6 R; m+ L" I
- importPackage (java.awt);
2 H- a. B, ]+ \; L* | - ) Z- R" k, H9 u
- include(Resources.id("mtrsteamloco:library/code/face.js"));5 u: G2 E" [( a3 l; D' }( h
- $ }8 Q& z/ a. T7 k
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ M |) L& G# ^* p6 n
- 3 u3 X, v) {- M3 A; F* b
- function getW(str, font) {+ G: I$ A" u. M% `9 B
- let frc = Resources.getFontRenderContext();
2 F- ^3 v5 H# e. p4 T% V( b - bounds = font.getStringBounds(str, frc);
1 Y6 ]1 j% r" x, }# o6 o - return Math.ceil(bounds.getWidth());, x' }- u; Z5 K/ N8 @
- }
' K- u; R e% ^5 w' y - : N' M% ?3 ]( U0 v# I
- da = (g) => {//底图绘制
) l0 V- H0 q- H# N; ] - g.setColor(Color.BLACK);
t1 U! t: p# ^: {, k - g.fillRect(0, 0, 400, 400);" k7 b- q& V6 m8 _% x) P& {9 d, O) |
- }6 D! g: r- t8 [% O) `0 u
- , W' }) w) U% X
- db = (g) => {//上层绘制0 T& I1 m' r- C/ p4 n, b6 E
- g.setColor(Color.WHITE);
3 b9 V6 J' V( p, C- ~ - g.fillRect(0, 0, 400, 400);" A O6 {1 W! n7 w0 s d5 V# {! ~
- g.setColor(Color.RED);
; x: E; }8 G4 i$ o5 {: E+ C* f [ - g.setFont(font0);
* p4 C9 E: c( w( l: y - let str = "晴纱是男娘";
" P8 z% q: ^$ g* D% |2 x - let ww = 400;8 f" N/ J; F' O) \( \, H
- let w = getW(str, font0);
& f: _( d0 g9 d: E' A; C3 c( z& ~ - g.drawString(str, ww / 2 - w / 2, 200);
/ K5 s! N" O, p' D. |" ~ - }5 F7 `9 ~# K: U4 I; @
- % x3 y0 B2 V( f) p2 C
- const mat = new Matrices();
7 x* b* v# x+ a8 ^" r0 d - mat.translate(0, 0.5, 0);; Q% r. q+ A% q6 U$ w
. E# U0 |0 E; T6 T! J$ N" U& X- function create(ctx, state, entity) {, V( _3 ^9 o: k+ C
- let info = {* j/ w* I/ y( z. l; B! o x8 }. t2 o
- ctx: ctx,
. s( J% f$ N+ K+ F) O2 w! a D - isTrain: false,
. X, d+ F ~) c - matrices: [mat],5 |7 M" A! U5 X! E1 t/ @/ @
- texture: [400, 400],
5 l- b6 J5 N2 j# _7 [3 A& u' ~ - model: {# z' p: K+ n+ w1 U+ T# a6 G% A
- renderType: "light",
# s" o A; t8 @, H - size: [1, 1],/ k+ S: ~7 y; L) q9 u
- uvSize: [1, 1]" V" Q! A( c4 J
- }
. H5 K& X8 B$ ^# Y; E5 { - }5 A! v0 l* l/ p% D5 ]! G
- let f = new Face(info);
$ ~8 q5 n, @; h8 z5 N7 c4 ] - state.f = f;
4 L/ p/ Q# X7 B d
, f! T W$ ^* R' }! Y( [- let t = f.texture;. W/ }$ D6 V3 L: q# Q: ]
- let g = t.graphics;
5 R9 y; P& \* `2 t! N* r( O$ B q - state.running = true;, ]' g6 A* q; t/ E2 [1 t
- let fps = 24;
. V4 s: E3 b L* i% X - da(g);//绘制底图) ~' {9 w, N; q O2 |: |
- t.upload();
: F# n9 V9 O a - let k = 0; I% m1 G7 q* R6 j4 _
- let ti = Date.now();, t; p4 C; B2 |0 A L6 t) f
- let rt = 0;
' c4 Q! J O. C - smooth = (k, v) => {// 平滑变化* {' U8 l/ M1 J8 t+ y
- if (v > k) return k;
3 D+ m4 L: F# `) C# E# d$ }$ L" r+ Z - if (k < 0) return 0;
3 L& Y1 _, i& w5 b! l - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
. p- N# b8 i% V2 D - }) M$ m( Z4 \) j4 y
- run = () => {// 新线程
# R; _$ U5 r: [8 c1 E - let id = Thread.currentThread().getId();+ _1 v, _. z3 V1 e/ ^- m7 k1 a
- print("Thread start:" + id);7 k4 J5 X0 l$ O# t# `2 l5 o1 C
- while (state.running) {! s: `( s5 @! o
- try {
/ H; y8 R) ]0 S2 K - k += (Date.now() - ti) / 1000 * 0.2;: N w$ a6 ~8 {
- ti = Date.now();9 G0 z$ i$ D0 w' [& j' \
- if (k > 1.5) {1 q3 t$ ~: s- q/ A* M
- k = 0;
- U* h# F+ \: {5 }/ ^) y7 t0 I - }) B$ h- }, ?2 j) W3 Q, z% w
- setComp(g, 1);* d2 O9 k- J0 v+ j
- da(g);
& ?5 L/ j# ~" _ - let kk = smooth(1, k);//平滑切换透明度
! t! ^6 e# a I) |; z/ D - setComp(g, kk); T: M1 H! ]1 ?" E6 |- ^" \
- db(g);
/ p0 V' X. n0 R' C5 W4 I/ V; o - t.upload();
' e( W) v7 c- C1 i- V2 W3 j3 n - ctx.setDebugInfo("rt" ,Date.now() - ti);
* }$ C; H9 L2 A9 V. Y; B0 v4 J# Z1 @* f - ctx.setDebugInfo("k", k);
( {2 C: l% `0 f( y* X$ ^" f - ctx.setDebugInfo("sm", kk);& k: C' b5 J/ r8 H: h
- rt = Date.now() - ti;
0 B9 S% b$ G) u0 `- p% W/ E - Thread.sleep(ck(rt - 1000 / fps));* d7 H! Y! z$ |3 @0 N4 H
- ctx.setDebugInfo("error", 0)
8 C& u# {4 f0 ^4 ?1 |: \ - } catch (e) {
+ c: L2 V% E* @1 Y$ S - ctx.setDebugInfo("error", e);
4 j& W( o* ^& b3 h5 e) D - }
3 s1 G! R0 ~% C: k - }6 f3 _( Z6 z+ w! B7 ?, E% K4 R
- print("Thread end:" + id);3 D4 t/ o$ e: E- J- y
- }; V q" H# b5 x5 ^# y# \
- let th = new Thread(run, "qiehuan");
: O. T7 R; m% k q0 n - th.start();! G$ w. q' f7 k* H$ d
- }
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+ i1 i$ i/ s& c- function render(ctx, state, entity) {
7 J8 \1 }7 s3 @ - state.f.tick();
. e# v6 }' a& i8 Y2 x - }
9 f: l# N' l7 P; n& o
. N; b R# N- f4 {6 u- function dispose(ctx, state, entity) {2 G, Q1 N/ u) Q3 U
- print("Dispose");
8 d4 K& U* ~4 S6 L+ g- t - state.running = false;
2 P( L" u( ?( f - state.f.close();3 C2 [2 z5 C' t" u0 p
- }) q) G+ v n& w" c% C0 M' S8 ^
- # {( s5 K# @- E' u
- function setComp(g, value) {
+ C8 |6 ^# P8 z$ L' H# V/ h' M/ T - g.setComposite(AlphaComposite.SrcOver.derive(value));" F6 r% m/ j: f! v( v
- }
复制代码 ' a3 ]3 Y' j6 P) d
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。. i! S$ T' z) Y' T! |
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; z) F- g& X$ 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)
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