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- y( P9 \7 } m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。
: ~6 q) k8 Y$ W$ x( C1 I- importPackage (java.lang);
9 E) e6 N5 y* q - importPackage (java.awt);
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) G$ G; S( a6 `2 H- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);! i( V# x- p3 p' _
v! c3 W# V1 A; p- function getW(str, font) {
; X5 S; Y, y) Y+ F - let frc = Resources.getFontRenderContext();
6 W7 b9 ~' s6 V2 U1 u$ ~ - bounds = font.getStringBounds(str, frc);6 N5 X( x/ r, s3 y# ?* I* }0 f
- return Math.ceil(bounds.getWidth());
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- 7 s( l4 X$ Q2 }& A; w( W
- da = (g) => {//底图绘制
' F$ V# M4 Q+ o1 y' m' d - g.setColor(Color.BLACK);
( k# k n+ h' B8 ^ - g.fillRect(0, 0, 400, 400);
4 }7 y" i6 @& l% K# }9 }4 r - }
& {# H" o3 K* O& c6 l! ?# G
. V/ Q+ n1 J6 B5 l! l' [- db = (g) => {//上层绘制
8 O8 j5 o& _; C5 b; u! G3 x - g.setColor(Color.WHITE);
! S. m; c ?4 C; D; Z6 x" { - g.fillRect(0, 0, 400, 400); R1 }$ A' ~* x
- g.setColor(Color.RED);1 A8 H. W. q+ |2 ~" O- s* b$ v& [
- g.setFont(font0);
* t: |# R$ v: {, c5 _. g t - let str = "晴纱是男娘";
2 _" I/ b4 ^$ g, { X! P* X: G - let ww = 400;
4 ^4 w0 T" u6 B, ?" S* A - let w = getW(str, font0);7 n2 @; B: `' {1 l
- g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();
- G3 l/ I/ U$ X+ q4 k# X' l3 n - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {" K/ F* a. ~: \# a
- let info = {
& Z |+ h9 V% f) N6 r# g) i - ctx: ctx,* m: r9 H2 I& U2 d+ \" s
- isTrain: false,7 ]6 W; I& Z; A/ P/ L- X3 K
- matrices: [mat], a. Y% q3 c8 z" C2 O- j* m
- texture: [400, 400],4 L: H5 L0 Y2 m l+ C
- model: {. B& Y) ^) U" D) W- i
- renderType: "light",) J; m/ S- U) ~- ^( h% }( e2 ]; e
- size: [1, 1],
. y$ X# S5 g3 A3 _7 A! A - uvSize: [1, 1]
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- let f = new Face(info);9 [" S- Q7 O) d' M, F- s* i8 [- c; z
- state.f = f;+ K/ b& i& e# y8 E, {
! K$ I$ {. W6 ^, L) f: ]' _4 u- let t = f.texture;
# z4 h( O0 I9 ] - let g = t.graphics;) K1 `' I8 e: A0 H
- state.running = true;( O3 N2 X2 H8 S: n9 l
- let fps = 24;; B6 c2 a4 w9 k+ V4 _5 v
- da(g);//绘制底图
+ @; W/ K5 ]! ?4 o - t.upload();
+ T, R0 n( a& m& N# y - let k = 0; e" Z- @% |7 q1 L: p# L8 x# ^
- let ti = Date.now();/ \5 |* q7 P' F6 g" A3 \! L
- let rt = 0;- a. l% X5 M! o+ J3 f" a2 c
- smooth = (k, v) => {// 平滑变化
3 |8 l: o" F" b0 P4 q - if (v > k) return k;
# k3 c) S3 O1 K) M( q - if (k < 0) return 0;
3 s4 Z* a6 x4 |" H6 ~ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
# O# S- x/ m# ?2 m8 k - }
* E) B. x$ r6 \ y) y& k$ g# T1 o) G - run = () => {// 新线程
* O: m4 D9 g& Z9 j7 V6 Z - let id = Thread.currentThread().getId();7 t. B4 l) Z6 S$ X
- print("Thread start:" + id);
4 z, e/ [; L, d+ y% b - while (state.running) {$ G& [% Q* v R1 {0 V0 Z( p
- try {
3 E3 j9 G+ y& s - k += (Date.now() - ti) / 1000 * 0.2;
0 f( D; U$ i# B {7 z+ n U N - ti = Date.now();: l/ R% o8 x4 G k6 {6 R- j; w4 H
- if (k > 1.5) {& T4 ]4 I$ B8 _: _. {1 ~/ z
- k = 0;# E4 E) ~! i8 t1 V0 e% A& R) m$ U9 y
- }
$ T) }4 n5 S }) v - setComp(g, 1);/ {1 T k9 f d( u
- da(g);
; L& _ D8 ]( G0 q8 \ - let kk = smooth(1, k);//平滑切换透明度; Y+ x. g% Q+ l& [8 C
- setComp(g, kk);( v3 M- @2 D+ O0 {9 L
- db(g);
! }% s- c' E) n. b0 L - t.upload();# k+ W% C! ?3 h* [( E1 K# v% @
- ctx.setDebugInfo("rt" ,Date.now() - ti);5 q, P3 ~1 j% r+ v8 [& Y: T
- ctx.setDebugInfo("k", k);1 b: [% o- x1 o
- ctx.setDebugInfo("sm", kk);0 e9 a, q t" Y
- rt = Date.now() - ti;& Z8 |$ q* T6 U/ {& ?5 D
- Thread.sleep(ck(rt - 1000 / fps));+ c, m/ ^5 Y% C* T: g o
- ctx.setDebugInfo("error", 0)
; l' S* t& o8 O - } catch (e) {
# M {% h, I5 v/ K; D - ctx.setDebugInfo("error", e);& i; ?- r; P/ x: C( D6 ?" l
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- print("Thread end:" + id);
- ~# I- u3 b- U' A) n0 x/ }7 h - }+ _! _4 c/ w! w- X3 z* S, [4 }! |
- let th = new Thread(run, "qiehuan");
6 i8 Z) f8 j1 j$ k - th.start();. Z* y8 A9 c$ b
- }
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- function render(ctx, state, entity) {
1 W) d# K* u8 }0 L$ q, W - state.f.tick();' m3 s0 i( `7 }4 S5 A. N+ y
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: C) _* I# ]; e- function dispose(ctx, state, entity) {/ B* }) P( s; S# ^* `! C8 L
- print("Dispose");" {/ ]9 Q2 p: {
- state.running = false;
- e, ?( V5 \3 W5 N4 @! B3 i* ?7 w - state.f.close();
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& z$ l, T! q& p( s( m) l+ u- function setComp(g, value) {+ S4 T. ^8 g/ L1 Q
- g.setComposite(AlphaComposite.SrcOver.derive(value));
) S6 I/ m# Q# B1 P2 `# ]) g - }
复制代码 % O# W$ M7 J9 H: u- f+ e
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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( X. X+ M/ t R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 ]4 L% N; N. a1 r* g, k3 d: x6 z
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