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! O: o$ T% S3 ~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。
+ [$ j/ L* u0 b! K/ ~' r- importPackage (java.lang);
' A; ]$ M# v6 h: |# I# m9 ?0 Y7 ` - importPackage (java.awt);7 l) b+ q! ~1 s0 p1 H. v4 `
- & S! o1 g4 t8 |8 e; o& L& t6 M0 p
- include(Resources.id("mtrsteamloco:library/code/face.js")); b. m! j7 k# ?% i6 h8 Q, R
- + J, C9 S0 h: z( t5 u6 \) f
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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. c! J. q% a- B T5 s# g! s- function getW(str, font) {& h% |' P+ S0 u9 }6 O# ?
- let frc = Resources.getFontRenderContext();
+ C+ ]% w. A* i4 X4 H3 ? - bounds = font.getStringBounds(str, frc);; m$ O) H6 _8 y6 n! E
- return Math.ceil(bounds.getWidth());
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- * }3 d% w N- i
- da = (g) => {//底图绘制
( E4 v2 K( _1 O- `" c, x$ N2 O - g.setColor(Color.BLACK);1 U1 j1 M8 ?! s$ d; _6 F7 s0 o1 [
- g.fillRect(0, 0, 400, 400);
* c7 D$ c: Q0 Y0 |( Q/ N - }9 q& u% e& u: C
) E, [: J# f# K6 N! ]2 [- db = (g) => {//上层绘制
]0 U9 }! k+ a - g.setColor(Color.WHITE);" r0 s/ m& X* l* ~$ d& x3 r
- g.fillRect(0, 0, 400, 400);- x. V/ K0 W' ^8 V( e" J! B) |/ i! e
- g.setColor(Color.RED);3 l* _- `7 \) u
- g.setFont(font0);8 H; Z$ d$ G! z( b
- let str = "晴纱是男娘";
d( v$ e, l" m( n - let ww = 400;
# n/ |: N- k/ H) { - let w = getW(str, font0);5 c0 y! c R/ t9 ]$ \2 w
- g.drawString(str, ww / 2 - w / 2, 200);8 l! b1 f5 I* x! ~5 P B/ {8 M
- }5 `0 C) k3 G. C, J$ T q
. |+ G' W) _* \- const mat = new Matrices();4 k6 b# n: W* _% }( u0 F
- mat.translate(0, 0.5, 0);( v+ w- O3 _; h
$ h6 z/ q% t. p+ J) ~- function create(ctx, state, entity) {* s$ B4 {- G) W4 v4 E! {
- let info = {+ B. M% n2 ]9 J
- ctx: ctx,
+ `- O& M" n ]9 I - isTrain: false,
* N) `/ ]6 p" M - matrices: [mat],
% U! s. M) _+ d' U7 a- i - texture: [400, 400],+ z! a( D, ]1 @1 F
- model: {
1 n) v; {) w \; I- T4 I6 B; e7 c - renderType: "light",
5 R3 I# R8 Y7 M! Y0 @2 } - size: [1, 1],/ F ^4 y$ e4 |% s, |0 j
- uvSize: [1, 1]
7 @- r1 Z2 N/ b - }: g6 y) b. R2 t3 T9 B# x/ ^
- }
* A: F4 p/ Q4 ~; i" c; k - let f = new Face(info);
/ M( S/ v; `! r - state.f = f;
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- let t = f.texture;% _$ d4 Q7 \0 P
- let g = t.graphics;
$ @" Z& s' W$ r# x- E - state.running = true;
1 \$ [; N7 J4 B, j( z: k - let fps = 24;9 ^* ~( D, U% g# U7 G
- da(g);//绘制底图0 M% C. J) m3 | u0 ] G: M
- t.upload();% i: R6 m0 t, f- r. d
- let k = 0;
; [( C0 s6 c& K% r - let ti = Date.now();% |5 l* t4 Y0 ]6 C
- let rt = 0;
3 I/ O& @ k6 k: W! D! B - smooth = (k, v) => {// 平滑变化) Z; P0 z* Z7 u: o/ Z. b& a
- if (v > k) return k;; h: P8 E* ^5 U
- if (k < 0) return 0;4 ]( h: p7 @; b& E2 ]6 c" ?
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
# l5 Z! q8 `5 W- r - }
" M3 W8 T7 [8 o. g - run = () => {// 新线程" z# O& V; ^2 B2 N; f' y; E8 o
- let id = Thread.currentThread().getId();- B- ^; p+ c% ~0 j' R+ H
- print("Thread start:" + id);0 c# d% g7 L$ _1 c* }
- while (state.running) {; `& J% w+ B2 C( Q/ t
- try {$ f1 A O, Q! E0 {; y" a$ o" ~
- k += (Date.now() - ti) / 1000 * 0.2;4 R ?- Q$ J: v1 v: t' D& F0 X
- ti = Date.now();& U2 Q6 {3 k9 i B$ d* I: `
- if (k > 1.5) {
- X0 q: H: o* b2 s% y4 l - k = 0;
7 |+ |6 a3 g, c4 A - }: P1 ]! z. r+ M
- setComp(g, 1);
+ P$ D* [, F$ P. Y e - da(g);" o7 P3 y5 W. @( S& B
- let kk = smooth(1, k);//平滑切换透明度
" H* x3 V4 Z9 b% D) X. G - setComp(g, kk);/ a2 C- ~, C! g+ @/ t$ A
- db(g);
5 ]% m) f1 F/ F9 `. t$ [4 \# \ - t.upload();
" Q/ e6 a: r! a - ctx.setDebugInfo("rt" ,Date.now() - ti);
. }: V! w" i$ j4 l - ctx.setDebugInfo("k", k);% P- |+ I) Y+ ~% W+ A
- ctx.setDebugInfo("sm", kk);1 L' t/ p0 ? Z
- rt = Date.now() - ti;! a2 g$ G2 L1 U2 m( C$ ~
- Thread.sleep(ck(rt - 1000 / fps));
2 X0 A% f4 ]1 T* e9 N - ctx.setDebugInfo("error", 0) `. ]3 p$ o! h* I" I2 v* U+ r; a v; F
- } catch (e) {
- i0 t' }- t# X* X - ctx.setDebugInfo("error", e);
7 E8 q" |% V- c4 l - }
& y6 V: s+ r: Z1 s - }1 U. J Y( `( j9 o
- print("Thread end:" + id);! ~2 R; z8 N, c5 L
- }" a& e0 x; T: w* N C0 m0 K! w8 B
- let th = new Thread(run, "qiehuan");5 R; v$ Z) S1 E8 p& O h; A! }1 D
- th.start();
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- " U4 Z& Q0 Z: a2 k
- function render(ctx, state, entity) {5 L, R3 k3 K9 T' c6 K( E5 T6 e
- state.f.tick();
' `/ {4 n, a6 p8 q9 k - }
3 n* t" S/ Z( ?* u2 @9 i, ~ - 8 l. O$ D" o# y$ _/ w2 P
- function dispose(ctx, state, entity) {
" s! T' T {* f: ^+ b3 Z# G - print("Dispose");
9 {' ?+ f2 K! d+ |; e" _/ ~ - state.running = false;2 L3 c7 k+ c6 Y
- state.f.close();
% t' k0 O2 [, b$ _4 v8 e0 H" p - }
, b/ U h0 N8 Y n3 |! E - ( l- }9 b# d; m6 M8 m: [
- function setComp(g, value) {+ @4 E h* X" u, K) o4 E5 {% E
- g.setComposite(AlphaComposite.SrcOver.derive(value));3 x, h$ G$ V) [$ w. g
- }
复制代码
; t8 y8 R% D+ X2 u9 t1 u R( r, y; \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。( g- e/ L) b$ s
; \+ u' P" Q# w5 F+ y3 B
" G7 f$ X* a7 n: E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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